{% extends "page_with_title_and_lede.html" %} {% load i18n %} {% block head_title %}Where to Stay{% endblock %} {% block heading %}Where to Stay{% endblock %} {% block body_class %}attend{% endblock %} {% block lede %} If you're coming from out of town, we'd love you to stay the night! We've made arrangements with the best hotels in Petaluma, with exclusive rates for North Bay Python attendees. {% endblock %} {% block content %}
We've made arrangements with three local accommodation providers to suit different budget options.
The only hotel in Downtown Petaluma is a recently renovated boutique hotel in a 1920s-era building. It's a short walk from North Bay Python's venue, and is close to Petaluma's best places to eat and drink.
Hotel Petaluma has offered all of their available rooms to North Bay Python attendees, so if you want to stay as close as possible to the venue, book through our exclusive link.
The only full-service hotel in Petaluma operated by a major chain. The Sheraton sits on the riverfront at the Petaluma Marina, and is a short drive from the venue. Our exclusive rate of $129/night is available until November 17th.
A modern, comfortable motel at the northern end of the city is a great option for attendees looking to save money. North Bay Python attendees get 15% off the best published rate at the time of booking by using our exclusive booking link.
There are other options for staying in Petaluma, that cater to a variety of budgets. We don't have an official relationship with these vendors, and provide these links for informational purposes only.
If you can't find something you're looking for in Petaluma, the nearby freeway town of Rohnert Park is 15 minutes drive away and has plenty of accommodation next to the freeway. People looking to spend obscene amounts of money may also be interested in the resort town of Sonoma, which is 20 minutes drive away.
Reasonable chain hotel and motel options also exist in Novato, however, we don't recommend staying there as traffic between there and Petaluma can be unpredictable.
{% endblock %}


The following settings change default behavior of all picklists.
Other various defaults
Set default indexes in your database.


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Here some examples
If you don't know how to create a type check out the dev center to understand how to define one.


Apart from being a software engineer, I enjoy most of my time being outdoors and mountain hiking.
I am an avid tennis player and a singlespeed cyclist. Also, I spend a large amount of my free time
exploring the latest technology advancements in the front-end,
back-end development, and data science world.


Default constructor of the class.
Euclidean algorithm to compute the Greatest Common Divisor or GCD.
The greatest common divisor between the operand A et operand B.
Application of the Thales Theorem used to compute 2 of the 6 side's size missing.
Length of the segment AD.
Length of the segment AB.
Length of the segment AE.
Length of the segment AC.
Length of the segment DE.
Length of the segment BC.
An object with the length of each segments expected as an associative array with the name of the segment as key and the size of the segment as value.
Indicate if the segment [DE] and [BC] are parallel or not.
Length of segment AD.
Length of segment AB.
Length of segment AE.
Length of segment AC.
Precision of the result excepted. By default, the number of digit expected is equal at 2 digits.
A boolean to indicate if the segment [DE] and [BC] are parallel or not.
Check if a number is a Mersenne Number or not.
This method implement the Lucas-Lehmer algorithm. You can get more information about this algorithm here : https://en.wikipedia.org/wiki/Lucas%E2%80%93Lehmer_primality_test
The number to test.
True if x is a Mersenne Number.
Check if a number is a prime number or not.
Number to check is a prime number.
True if x is a prime number.
Get the Least Common Multiple (LCM) of two numbers.
A number.
Another number.
The least common multiple between a and b.
Pythagorean theorem used to check if a triangle is right or not.
Hypotenuse of the potential right triangle
First cathetus of the potential right triangle.
Seconde cathetus of the potential right triangle.
A boolean to indicate if the triangle is right or not.
Compute the thirds side of a right triangle. To this, get two sizes to compute the last size.
Hypotenuse of the triangle.
First side of the triangle.
Second side of the triangle.
The size of the third value of the right triangle.
Generated using TypeDoc
Class who contains all elements relatives to the Mathematics sciences.
Nicolas GILLE<EMAIL_ADDRESS>0.1.0
1.0
MIT


The XMLHTTPRequest object was first implemented as a proprietary Active-X control in _WinIE5_. Later it was _emulated_ by Mozilla in an effort to increase that browser's compatibility with DHTML which used the extension. Once that occured, it quickly became a practical necessity for other browsers to implement it in the same way to stay relevant for advanced DHTML.
The current list of browsers which have a useable level of XMLHTTP support is: _WinIE5+_, _Gecko-based?+_ (Mozilla?+, Firefox?+), Konqueor?+, Safari?+, Opera?+, and OmniWeb?+. This wide support has encouraged major public facing applications such as _GMail_ and _Base Camp_ to us to adopt the technology.
The web is littered with good, detailed descriptions of how to implement XMLHTTPRequest. For the sake of discussion, lets just use the really simple function below.
/** * A super simple XMLHTTPRequest wrapper for handling the most common * cases. Mostly stolen from http://jibbering.com/2002/4/httprequest.html * * @param url The URL to request with any querystring already * appended. * @param callback A function to call when load is complete. Function will * be passed the native XMLHTTPRequest object as an * argument, which it can examine for results. * @param postdata form-urlencoded data to be sent through POST, or null * if none required. */ function doXmlHttpRequest(url, callback, postdata) { var xmlhttp = null; var loaded = false; // special conditional compilation comments hide this code from all // browsers except win/ie. /*@cc_on @*/ /*@if (@_jscript_version >= 5) try { xmlhttp = new ActiveXObject("Msxml2.XMLHTTP"); } catch (e1) { try { xmlhttp = new ActiveXObject("Microsoft.XMLHTTP"); } catch (e2) { xmlhttp = false; } } @end @*/ if (!xmlhttp && typeof XMLHttpRequest != 'undefined') { xmlhttp = new XMLHttpRequest(); } xmlhttp.open(postdata == null ? "GET" : "POST", url, true); xmlhttp.onreadystatechange = function() { // must check whether previously loaded because of bug in Safari/Opera // where onreadystatechange gets called multiple times with //readyState == 4. if (!loaded && xmlhttp.readyState == 4) { callback(xmlhttp); loaded = true; } } xmlhttp.send(postdata); }
Once you've decided to use XmlHttp, you need to decide what the response format will be. This decision has a significant impact on the speed, flexibility, and extensibility of your app.
If the server returns a valid XML document, you can retreive it through the _responseXML_
property. Note that in order for this property to be non-null in all browsers, the response must be sent with it's Content-type header set to "text/xml". You can then navigate it's DOM tree to extract the returned data.
Assuming the server-side PHP script xmlhttp_server_xml.php
contained this code:
<result> <serverTime><?= date('r') ?></serverTime> </result>
... then you could use the following JavaScript to call it and parse the result:
function testXML() { doXmlHttpRequest( "xmlhttp_server_xml.php", function(xmlhttp) { alert("server time is: " + xmlhttp.responseXML.documentElement .getElementsByTagName("serverTime")[0].firstChild.nodeValue); }); }
The upside of using XML is that it creates a clean, platform-independent, widely-supported server interface. If you intend for other, non-DHTML clients to call this URL, or if they ever end up doing so, they will almost certainly have well-tested libraries available on their platform for manipulating XML. _Google Maps_ is an example of an application using XMLHTTP with an XML response type for this reason.
The downside of XML is that it isn't an optimal format for DHTML itself. Although the XMLHTTPRequest object is highly standardized across browsers, the XMLDocument object is not. The methods for executing XPath expressions for example, which are the best way to navigate a DOM tree, are incompatible across WinIE and Mozilla.
Another downside of returning XML is that it is a very memory and processor intensive format. The entire returned document must be parsed and loaded up into a DOM tree before it can be used. And even then, you will likely have to make at least one more pass over the data, creating intermediate data structures, before the UI can be updated.
In some cases, all you are trying to do is update a section of the UI. If your app's structure and presentation are relatively separated, it may be easy to simply send replacement HTML.
The advantage is that it's very easy. The innerHTML
property can be used (in most cases, not with an XHTML strict doctype) to overwrite the contents of some element in one line. For example, if you had the following PHP file called xmlhttp_server_html.php
:

Server time is: <?= date('r') ?>.

... then you could use the following javascript to insert the result into the document:
function testHTML() { doXmlHttpRequest( "xmlhttp_server_html.php", function(xmlhttp) { document.getElementById("html-result").innerHTML = xmlhttp.responseText; }); }
The downside of returning HTML is that it ties your server interface more tightly to the UI which displays it. If the UI changes significantly, the server interface may have to change as well.
A response format which has recently gained some popularity, with _Google Suggest_ for example, is JavaScript. The advantage being that it is extremely fast since it uses the fastest possible parser in DHTML: the JavaScript parser itself.
The strategy is to return some JavaScript from the server which calls a function waiting on the receiving page...
showTime("= date('r') ?>");
The JavaScript code is then run by using JavaScript's built-in _eval()_
method:
function testJavaScript() { function showTime(stime) { alert("Server time is: " + stime); } doXmlHttpRequest( "xmlhttp_server_js.php", function(xmlhttp) { eval(xmlhttp.responseText); }) }
The downside again of this approach is even tighter coupling to the client UI than returning HTML. However, that might be an appropriate tradeoff for applications requiring ultimate responsiveness and expecting few requirements for alternative clients.


Photography is the art, science and practice of creating durable images by recording light or other electromagnetic radiation, either chemically by means of a light-sensitive material such as photographic film, or electronically by means of an image sensor.[1] Typically, a lens is used to focus the light reflected or emitted from objects into a real image on the light-sensitive surface inside a camera during a timed exposure.


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Introduction
In this section I will demonstrate a broadband hamnet radio link between two laptops. The link is composed of two Linksys WRT54GL routers that have had their firmware reflashed with the Broadband Hamnet firmware available here.
Setting up Node 1
After the WRT54GL routers were reflashed with the Broadband Hamnet firmware, I logged into Node 1 by entering http://localnode:8080 in the URL entry bar. This brought up the main screen which displays signal telemetry as well as a button for setup.
WRT54GL Router for Node 1
Here we show Node 1's WRT54GL router.
Setting up Node 2
Node 2's main screen is brougt up by accessing localnode:8080 on the second laptop.
Video of Accessing a Website on Node 1's Laptop from Node 2's Laptop
In this video I demonstrate accessing a website that resides on the laptop attached to Node 1 from a laptop attached to Node 2. The website is accessed by entering ac2lh-node1 into the url bar of the browser opened on Node 2's laptop. The request goes out over the broadband hamnet and Node 1 is configured to forward port 80 requests to the laptop attached to Node 1. Node 1 has an Apache webserver started and responds to this request.
Broadband Hamnet Websites
This is a list of websites that I have found to contain very useful information concerning broadband hamnet:
Broadband-Hamnet Main Website
HSMM: High-Speed Multimedia Projects Hamnet


FROM: Mr.Chris Kolade. 33 MARINA,LAGOS.NIGERIA. Alternative email<EMAIL_ADDRESS>Telephone:<PHONE_NUMBER>565. Good Day, l am Mr.Chris Kolade, Civil Servant in the Ministry of Health. l know this proposal will come to you as a surprise because we have not met before either physically or through correspondence. I got your contact from our chamber of commerce here in Nigeria and have no doubt in your ability to handle this proposal involving huge sum of money.My father Chief Isama Kolade (Now Late) was the Royal Head of my community, ELEME (an oil rich town) in Nigeria. My community produces 5.8% of the total crude oil production in Nigeria and 0.5% of the Dollar value of each! barrel is paid to my father as royalty by the Federal Government. My father was also the Chairman of ISAMA Special Oil Trust Fund. In his position as the Royal head and Chairman of the Oil Trust Fund, he made some money which he left for me as the only heir to inherit.The money is Eighteen Million, Five Hundred Thousand US Dollars(US$18.5). This Money originated from the accumulated royalties between 1976-1998 Due to poor banking system in Nigeria and political instability as a result of past Military rules (1985-1999) ,he deposited this Money in a Strong Room"VAULTS" with an open beneficiary in a security company pending when he would finish arrangement to transfer it abroad.He was planning this when he died late last year of Heart Attack. Just before my father died he called my attention to the money and charged me to look for a foreigner who would assist me in the transfer/investment of the funds abroad. So l would be very grateful if you could accept to help me achieve this great objective.I promise to give you 15% of the total funds transferred to your vital Bank account as compensation for your assistance. Five percent (5%)has been set aside to take care of all expenses we may incure during the transaction. To indicate your interest,contact me urgently and confidentially for more information and the roles you will play in this business. All the legal Documents concerning this Money will be sent to you as soon as we agreed ether.Please I will appreciate that you send your telephone/fax numbers to enable me contact you immediately for discussions. May the almighty God bless you. Yours faithfully, Mr.Chris Kolade. Please reply me through this my alternative email address<EMAIL_ADDRESS>Telephone:<PHONE_NUMBER>565.


public class BallListener
Created by Shynixn 2018.
| Constructor and Description |
|---|
BallListener(BallEntityService ballEntityService,
ParticleService particleService,
SoundService soundService)
Created by Shynixn 2018.
|
| Modifier and Type | Method and Description |
|---|---|
void |
ballGrabEvent(BallGrabEvent event)
Gets called when a player grabs a ball.
|
void |
ballInteractEvent(BallInteractEvent event)
Gets called when a player interacts a ball.
|
void |
ballKickEvent(BallKickEvent event)
Gets called when a player left clicks a ball.
|
void |
ballMoveEvent(BallPreMoveEvent event)
Gets called when a ball moves.
|
void |
ballSpawnEvent(BallSpawnEvent event)
Gets called when the ball spawns.
|
void |
ballThrowEvent(BallThrowEvent event)
Gets called when a player throws a ball.
|
void |
entityDamageEvent(NonExistentClass event)
Gets called when an entity takes damage.
|
void |
entityLeashEvent(NonExistentClass event)
Gets called when a player tries to leash a ball and cancels all of it.
|
void |
gameGoalEvent(GameGoalEvent event)
Gets called when a ball gets shot into goal.
|
void |
onChunkLoadEvent(NonExistentClass event)
Checks if a ball armorstand is inside of the chunk and remove it.
|
void |
onChunkSaveEvent(NonExistentClass event)
Avoids saving the ball into the chunk data.
|
void |
onInventoryOpen(NonExistentClass event)
Drops the ball on inventory click.
|
void |
onInventoryOpenEvent(NonExistentClass event)
Drops the ball on inventory open.
|
void |
onPlayerCommandEvent(NonExistentClass event)
Drops the ball on command.
|
void |
onPlayerDamageBallEvent(NonExistentClass event)
Gets called when a player left-click a ball.
|
void |
onPlayerDeathEvent(NonExistentClass event)
Drops the ball on death.
|
void |
onPlayerDropItem(NonExistentClass event)
Drops the ball on item drop.
|
void |
onPlayerEntityEvent(NonExistentClass event)
Drops the ball on interact.
|
void |
onPlayerInteractBallEvent(NonExistentClass event)
Gets called when a player interacts on a ball item.
This action generally performs throwing the ball.
|
void |
onPlayerQuitEvent(NonExistentClass event)
Drops the ball on left.
|
void |
onPlayerRightClickBallEvent(NonExistentClass event)
Gets called when a player right-click a ball.
|
void |
onSlotChange(NonExistentClass event)
Drops the ball on Slot change.
|
void |
onTeleportEvent(NonExistentClass event)
Drops the ball on teleport.
|
public BallListener(BallEntityService ballEntityService, ParticleService particleService, SoundService soundService)
Created by Shynixn 2018.
public void onChunkSaveEvent(NonExistentClass event)
Avoids saving the ball into the chunk data.
event
- eventpublic void onChunkLoadEvent(NonExistentClass event)
Checks if a ball armorstand is inside of the chunk and remove it.
public void onPlayerInteractBallEvent(NonExistentClass event)
Gets called when a player interacts on a ball item. This action generally performs throwing the ball.
event
- eventpublic void onPlayerRightClickBallEvent(NonExistentClass event)
Gets called when a player right-click a ball.
Player grabs the ball if he were sneaking (SHIFT)
Otherwise, player performs passing
event
- eventpublic void onPlayerDamageBallEvent(NonExistentClass event)
Gets called when a player left-click a ball.
Player grabs the ball if he were sneaking (SHIFT)
Otherwise, player performs shooting
event
- eventpublic void entityDamageEvent(NonExistentClass event)
Gets called when an entity takes damage.
Cancel all the damage if victim is a ball entity
If victim is a player grabbing a ball, he/she will drop it
event
- eventpublic void onPlayerCommandEvent(NonExistentClass event)
Drops the ball on command.
event
- eventpublic void onInventoryOpenEvent(NonExistentClass event)
Drops the ball on inventory open.
event
- eventpublic void onPlayerEntityEvent(NonExistentClass event)
Drops the ball on interact.
event
- eventpublic void onPlayerDeathEvent(NonExistentClass event)
Drops the ball on death.
event
- eventpublic void onPlayerQuitEvent(NonExistentClass event)
Drops the ball on left.
event
- eventpublic void onInventoryOpen(NonExistentClass event)
Drops the ball on inventory click.
event
- eventpublic void onTeleportEvent(NonExistentClass event)
Drops the ball on teleport.
event
- eventpublic void onPlayerDropItem(NonExistentClass event)
Drops the ball on item drop.
event
- eventpublic void onSlotChange(NonExistentClass event)
Drops the ball on Slot change.
event
- eventpublic void entityLeashEvent(NonExistentClass event)
Gets called when a player tries to leash a ball and cancels all of it.
event
- eventpublic void ballKickEvent(BallKickEvent event)
Gets called when a player left clicks a ball.
event
- eventpublic void ballInteractEvent(BallInteractEvent event)
Gets called when a player interacts a ball.
event
- eventpublic void ballThrowEvent(BallThrowEvent event)
Gets called when a player throws a ball.
event
- eventpublic void ballGrabEvent(BallGrabEvent event)
Gets called when a player grabs a ball.
event
- eventpublic void ballSpawnEvent(BallSpawnEvent event)
Gets called when the ball spawns.
event
- eventpublic void ballMoveEvent(BallPreMoveEvent event)
Gets called when a ball moves.
event
- eventpublic void gameGoalEvent(GameGoalEvent event)
Gets called when a ball gets shot into goal.
event
- event


The adevs (A Discrete EVent system Simulator) library supports the construction of discrete event models using the Parallel DEVS formalism. In addition to basic and network Parallel DEVS models, adevs includes support for dynamic structure models based on the Dynamic DEVS formalism. Several good texts are available for those who are not already familiar with DEVS in one of its many forms (see www.acims.arizona.edu for an extensive collection of tutorials, research papers, and alternate implementations of the DEVS formalism). This manual provides a brief and, I hope, intuitive introduction to DEVS. The source code for examples included in this manual can be found examples directory.
This manual has two parts: the API documentation and the user manual. The user manual is available as an HTML document or as a PDF file.
For users who want more information on the concepts underlying this simulation software, the bibliography below is a good place to start:
A. M. Uhrmacher. Dynamic structures in modeling and simulation: a reflective approach, ACM Transactions on Modeling and Computer Simulation, Vol. 11, No. 2 , pp. 206-232. April 2001. DOI=10.1145/384169.384173 http://doi.acm.org/10.1145/384169.384173. The approach by adevs to modeling and simulation of dynamic structure systems is described in this paper.
Bernard P. Zeigler, Tag Gon Kim and Herbert Praehofer. Theory of Modeling and Simulation, Second Edition. Academic Press. 2000. The publisher's website is http://www.elsevierdirect.com/product.jsp?isbn=9780127784557, and this book is available from most on-line booksellers. The Discrete Event System Specification (DEVS) is developed in this book from its roots in abstract systems theory.
James J. Nutaro. Building Software for Simulation: Theory and Algorithms, with Applications in C++. Wiley. 2010. The publisher's website is http://www.wiley.com/WileyCDA/WileyTitle/productCd-0470414693.html, and this book is also available from most on-line booksellers. This book presents the Discrete Event Systems Specification along side code for the (slightly abridged) adevs simulator and examples of its use.
Question and comments about this software can be sent to its maintainer, Jim Nutaro, at nutarojj@ornl.gov.


{{ define "main"}} {{ if eq .Section "blog" }}
In this section you will find a set of long-form posts. They are a selection of posts that have already been published on my newsletter. Anything you want me to write about here? Feel free to contact me.
{{ else if eq .Section "til" }}This is the TIL (Today I Learned) section of my website. Here you'll find short and raw posts about things I learned a day I once called "today". Think of it as a personal journal.
{{ end }}


{# 1st H1 is often == file name. Prevent duplicate links #} {% if toc_item.title | lower != nav_item.title | lower or (navlevel != 2 and navlevel != 1) %}


This is a short example of how to use a single video player, but record multiple, separate interaction sessions.
First, include the YouTube player.
Here, we use data-name="lllplayer"
.
Then, whenever you want to start a new session,
stop()
the player,
followed by newSession(log_field_name)
.
For details, see the code at the bottom of the page.
Live heat-map:
Past heat-maps:
Code executed when creating a new session::
// Required: Call stop(): lllplayer.stop(); // Preferably, pick a new name for the log field (initial name is 'events_1'): var name_counter = lllplayer.log_field_name.split('_'); var new_name = name_counter[0] + '_' + (Number.parseInt(name_counter[1])+1); var heatmap = LLL.HEATMAP.createHeatmapAndDiv(lllplayer, []); heatmap.showHeatmapOf(lllplayer); $('#heatmapList').prepend(heatmap.node); // Call newSession(): lllplayer.newSession(new_name)


A Test Run object represents the execution of a specific Test as part of a Test Suite Run.
This object has no members.
The ID of the Test instance to which this Test Run is bound.
Format: free
SDK attribute: associatedTestID
Test Run instances are part of a Test Suite Run. This is the ID of the Test Suite Run object to which this Test Run belongs.
Format: free
SDK attribute: associatedTestSuiteRunID
The command, with its arguments, that is to be executed as part of the Test Run.
Format: free
SDK attribute: command
The exit code returned to the OS from the executed test command. Field modified on VSD by the NSG.
SDK attribute: commandExitCode
The output of the test command that was executed. Updated on VSD by the NSG.
Format: free
SDK attribute: commandOutput
A brief summary of the command output received by the NSG. Only the beginning and the end of the output is displayed.
Format: free
SDK attribute: commandOutputSummary
The duration of execution of the Test in milliseconds.
SDK attribute: duration
Metadata objects associated with this entity. This will contain a list of Metadata objects if the API request is made using the special flag to enable the embedded Metadata feature. Only a maximum of Metadata objects is returned based on the value set in the system configuration.
SDK attribute: embeddedMetadata
Specify if scope of entity is Data center or Enterprise level
Allowed values: ENTERPRISE, GLOBAL
SDK attribute: entityScope
External object ID. Used for integration with third party systems
Format: free
SDK attribute: externalID
ID of the user who last updated the object.
Format: free
SDK attribute: lastUpdatedBy
The status of the test operation request as received by the NSG Agent. This field is set by the NSG.
Allowed values: COMPLETED, FAILED, STARTED, TIMED_OUT, UNKNOWN
SDK attribute: operationStatus
The start date and time of the test in milliseconds since Epoch.
SDK attribute: startDateTime
The stop date and time of the test in milliseconds since Epoch.
SDK attribute: stopDateTime


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This is another tooltip with a custom link. I'm a link


ifTree - Examples
- Hello - simplest possible example.
- Flags - uses flags so that an early choice by the user affects the options available later on.
- Coin Toss - an example of introducing randomness by putting multiple targets into an option.
- jsAlert - uses the onShow hook to run some simple JavaScript
- jsConfirm - uses the onSelect hook to run some simple JavaScript and modify the result.


- checkPredecessor() - Method in class Chord
-
Ensure that we still have an alive predecessor
- Chord - Class in <Unnamed>
-
The Class Chord is the server-side implementation fo the Chord.
- Chord(int, long) - Constructor for class Chord
-
Constructor for our Chord server class
- chord - Variable in class ChordUser
-
- ChordMessageInterface - Interface in <Unnamed>
-
The Interface Chord is the server-side implementation fo the Chord.
- ChordUser - Class in <Unnamed>
-
The class Chord User defines the CLI for using the Chord.
- ChordUser(int) - Constructor for class ChordUser
-
Constructor for our chord CLI
- closestPrecedingNode(long) - Method in class Chord
-
Return our chord's immediate successor (The chord in front of us in the ring)
- closestPrecedingNode(long) - Method in interface ChordMessageInterface
-
- currentPosition - Variable in class FileStream
-


Engineered for
extended comfort
From the precise slant of the ear bud tip, to the calculated angle of our forward facing cable, every detail was considered when designing our most ergonomic earphones yet. Extensive testing on thousands of listeners around the world ensures that these earphones are as pleasurable to wear as they are to listen to.
Angled precisely at 119° to fit your ear canal more naturally.
The forward facing cable is inclined at 35° to avoid pressure on earlobes.


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One month free calls to Cosmote and 300' to others, 2GB and 200 SMS for 15$/mo -3% on annual premium
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As part of a semester-long project, I am implementing a comprehensive 2D game engine from scratch using Java. My engine includes Systems to render game objects, handle user input, detect in-game collisions, and many more capabilities.
Essential to the implementation of this engine is an understanding of the flow of execution. In my design, program execution starts at the Application, then percolates through layers of increasing specificity and intricacy.
Take the journey of a single key press for example.
When the user presses the 'a' key, the current running Application passes the event along to the GameWorld, current active Screen, and ViewPort. The GameWorld passes execution along to its Systems, which pass executions to specific behaviors, which in turn update the state of the GameObjects to which they belong. The Screen and ViewPort pass execution along in a similar fashion.
I have built three games thus far on top of my engine:
Tic Tac Toe: a digital recreation of the classic game
Alchemy: my rendition of this game
Paws off my Crops: a work in progress involving tending to, and protecting, a farm.
Maps was a full-stack software engineering assignment. My partner and I were tasked with querying a database, parsing information, and rendering a map that displayed shortest routes.
This was another full-stack engineering assignment that involved parsing data to build up a Trie in order to be able to give real-time spelling suggestions to users as they typed.


nips nips2011 nips2011-200 nips2011-200-reference knowledge-graph by maker-knowledge-mining
Source: pdf
Author: Bo Chen, David E. Carlson, Lawrence Carin
Abstract: Nonparametric Bayesian methods are developed for analysis of multi-channel spike-train data, with the feature learning and spike sorting performed jointly. The feature learning and sorting are performed simultaneously across all channels. Dictionary learning is implemented via the beta-Bernoulli process, with spike sorting performed via the dynamic hierarchical Dirichlet process (dHDP), with these two models coupled. The dHDP is augmented to eliminate refractoryperiod violations, it allows the “appearance” and “disappearance” of neurons over time, and it models smooth variation in the spike statistics. 1
[1] A. Bar-Hillel, A. Spiro, and E. Stark. Spike sorting: Bayesian clustering of non-stationary data. J. Neuroscience Methods, 2006.
[2] A. Calabrese and L. Paniski. Kalman ﬁlter mixture model for spike sorting of non-stationary data. J. Neuroscience Methods, 2010.
[3] T. S. Ferguson. A Bayesian analysis of some nonparametric problems. The Annals of Statistics, 1973.
[4] Y. Gao, M. J. Black, E. Bienenstock, S. Shoham, and J. P. Donoghue. Probabilistic inference of arm motion from neural activity in motor cortex. Proc. Advances in NIPS, 2002.
[5] J. Gasthaus, F. Wood, D. Gorur, and Y.W. Teh. Dependent Dirichlet process spike sorting. In Advances in Neural Information Processing Systems, 2009.
[6] D. Gorur, C. Rasmussen, A. Tolias, F. Sinz, and N. Logothetis. Modelling spikes with mixtures of factor analysers. Pattern Recognition, 2004.
[7] D. A. Henze, Z. Borhegyi, J. Csicsvari, A. Mamiya, K. D. Harris, and G. Buzsaki. Intracellular feautures predicted by extracellular recordings in the hippocampus in vivo. J. Neurophysiology, 2010.
[8] J.A. Herbst, S. Gammeter, D. Ferrero, and R.H.R. Hahnloser. Spike sorting with hidden Markov models. J. Neuroscience Methods, 2008.
[9] M.D. Hoffman, D.M. Blei, and F. Bach. Online learning for latent Dirichlet allocation. Proc. NIPS, 2010.
[10] H. Ishwaran and L.F. James. Gibbs sampling methods for stick-breaking priors. J. Am. Stat. Ass., 2001.
[11] J. C. Letelier and P. P. Weber. Spike sorting based on discrete wavelet transform coefﬁcients. J. Neuroscience Methods, 2000.
[12] M. S. Lewicki. A review of methods for spike sorting: the detection and classiﬁcation of neural action potentials. Network: Computation in Neural Systems, 1998.
[13] J. Mairal, F. Bach, J. Ponce, and G. Sapiro. Online learning for matrix factorization and sparse coding. J. Machine Learning Research, 2010.
[14] M.A. Nicolelis. Brain-machine interfaces to restore motor function and probe neural circuits. Nature reviews: Neuroscience, 2003.
[15] O. Papaspiliopoulos and G. O. Roberts. Retrospective Markov Chain Monte Carlo methods for Dirichlet process hierarchiacal models. Biometrika, 2008.
[16] C. Pouzat, M. Delescluse, P. Viot, and J. Diebolt. Improved spike-sorting by modeling ﬁring statistics and burst-dependent spike amplitude attenuation: A Markov Chain Monte Carlo approach. J. Neurophysiology, 2004.
[17] L. Ren, D. B. Dunson, and L. Carin. The dynamic hierarchical dirichlet process. International Conference on Machine Learning, 2008.
[18] G. Santhanam, S.I. Ryu, B.M. Yu, A. Afshar, and K.V. Shenoy. A high-performance braincomputer interface. Nature, 2006.
[19] J. Sethuraman. A constructive deﬁnition of dirichlet priors. Statistica Sinica, 4:639–650, 1994.
[20] Y. W. Teh, M. I. Jordan, M. J. Beal, and D. M. Blei. Hierarchical dirichlet processes. J. Am. Stat. Ass., 2005.
[21] F. Wood, S. Roth, and M. J. Black. Modeling neural population spiking activity with Gibbs distributions. Proc. Advances in Neural Information Processing Systems, 2005.
[22] W. Wu, M. J. Black, Y. Gao, E. Bienenstock, M. Serruya, A. Shaikhouni, and J. P. Donoghue. Neural decoding of cursor motion using a Kalman ﬁlter. Proc. Advances in NIPS, 2003. 9


STARSTRUCK
A Kinetic Light Display
ABOUT
Starstruck is a kinetic display featuring 18 hanging lights whose position and color can be interactively animated. The goal for this project is to motivate children’s interest into the intersection of art and technology. The piece consists of a grid of 18 suspended, LED-illuminated ping pong balls that are raised and lowered independently by 18 stepper motors. The piece can be programmed to create different patterns using both color and motion. The installation is controlled by Arduino Mega and Arduino-Houdini interface.
We presented our design in Ithaca Science Center. Children really like it!
PROCESS
The key concept of the design process is iteration. The project is devided into four different parts: structure and physical motion, animation, lighting system, motor system. Every component was tested and modfied in every step of the iteration.
Motor System
In our final prototype, we wired the stepper motors in groups of six. We used a step pin and a direction pin for each motor, totalling 36 pins. We ran into power issues during initial assembly but, using voltmeters to extrapolate power demand, we found our display requires 10A and ordered a 15A power supply accordingly.
Lighting System
In our initial implementation, we used a digitally-controllable strand of LEDs, which allowed 24 LEDs to be controlled with 2 pins. Each RGB LED had a controller chip inside it which allowed us to control the LEDs independently with a single 4 conductor cable using an internal 8-bit PWM LED driver. The light system remained functionally the same throughout our design process to the final implementation. For our final prototype, we had to individually solder 24 LEDs.


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Who is the founder of Facebook?
Ans: 'Mark Zurkerberg'
Who is the richest man in the world?
Ans: 'Jeff bezos'
Who has the most followers on twitter?
Ans: 'Barack Obama'
Who has the most followers on facebook?
Ans: 'Cristiano Ronaldo'
Who holds the record for most grand slams won in women's tennis?
Ans: 'Serena Williams (23 Grand Slams Titles)'
Who won the most UEFA best player award?
Ans: 'Cristiano Ronaldo (3 awards)'
Who is the best player in the world in the year 2002?
Ans: 'Ronaldo (Brazil)'
Jimmy’s mother had three children. The first was called April, the second was called May.
What was the name of the third?
Ans: 'Jimmy'
begins with T, ends with T, and has T in it?
Ans: 'A teapot'
What has a head and a tail but no body?
Ans: 'A coin'
You can hold it without using your hands or your arms. What is it?
Ans: 'Your breath'
What building has the most stories?
Ans: 'The Library'
Who has the most followers on youtube?
Ans: 'PewDiePie with subscribers worth 96m'


All The Heterosexual Nonsense I Was Forced To Endure During Episode 12 Of ‘The Bachelorette’
by Patrick LentonHello, and welcome to Junkee’s recaps of The Bachelorette Australia, where we watch episodes of The Bachelorette Australia and try to pretend we’re OK with all the hetero nonsense we see in front of us.
Toot toot! Honk honk!
Related
What’s that coming around the bend, tootin and honkin and squealin like 30-50 wild hogs? It’s nothing more than The Bachelorette finale! The final episode!!!
And who’s that classy lad, with the manic grin, and the wild eyes and the wide open mouth? Why it’s me, your recapper, Patrick Lenton! My foot is on the accelerator and we’re barreling wildly into the future, heedless of any obstructions!
Rebecca Shaw is in the backseat, having a nap, because her job is done. Please make sure to send her pictures of the baby with a gun to show your appreciation for her service.
I cannot tell you how many weirdly lesbian problems Rebecca Shaw had to juggle to complete these recaps, so many various competing netball games! She did so well.
Anyway, we’re here. And I know I do a lot of whining and whinging and griping, but this was GENUINELY a wholesome season of TV. Fuck.
Even with the various weirdos at the beginning (RIP, I assume they all got killed by Osher in weirdly fitting ways, like the children that Willy Wonka murdered.
I love these weirdos, I love Angie, and I feel good with all this. Who knew The Bachelorette could do me this way?
Maybe it’s because I’m all loved up this time, rather than going through a breakup like the last Bachelorette season, or maybe Angie is just a legend. I think we should be friends!
Anyway, let’s rank. Nobody is annoying, everyone is wholesome.
Least Annoying
Angie
I don’t want to sound like these poor lovelorn fools who are all doing heart-eyes at Angie, but it is absolutely her light which drives this show.
She’s such a strong personality, so funny and fun and motivated to get what she wants, and I think that makes a difference.
Also, her journey (lol) is pretty interesting — a woman who has never fallen in love before. As a pretty guarded person, I guess I can see how that can happen, and also i hate love, and also straight men are terrible, so yeah, i can definitely see how this happens.
Anyway — she’s very open in this episode about her confusion, and she says that she’s often confused. I think maybe she does think too much about things, and is happier never making a decision.
I’m not sure either of these dudes are right for her, but I reckon she definitely connects better with Timm.
Anyway! Happy for her. I love that her last line was “I’ve been sweating in my dress all day, so I’m probably a bit gross.”
Carlin
I’ve called this boy bland before, and I don’t HATE that characterisation, but maybe it’s unfair.
I think maybe he’s nice. Nice is a damning term, I think.
What he does have going for him is his willingness to be vulnerable, his emotional maturity, his politeness ( I value politeness a lot).
In fact, the vulnerability and the emotional maturity from the majority of men in this show has been exemplary!
 I think it casts a kind of spell. I would choose him simply because of the heft of his shoulders.
Sometimes I look at him and imagine bearing his children, of being heavily pregnant while wearing overalls, of running around on a small Greek island and singing about how much I love him, and…
He’s just that hot.
I have nothing bad to say about him, but I don’t particularly stan this decision.  Tell me how it goes.
When he wins it’s sweet! I’m happy for them. He’s probably a really nice guy, and if you read this Carlin, pls don’t take these thirsty mean comments to heart — you can even write them off as jealousy if you like. Maybe one day we can sit down and awkwardly stare into the distance together.
Timm
This sweet boy, this avatar of chaos, this wind sprite, this drawling satyr.
I do love him a lot.
But I’ve been thinking about it. I fell in love with Timm when I realised that he is funny because of two reasons — because he can make jokes and specifically find the humour in things (smort), and also because he IS inherently funny, as in funny weird.
And I realised that when he just kept pointing out cows.
That is funny, and it was compulsive. He didn’t do that for anyone but himself.
And I think him and Angie are both special, weird people. One of a kinds. And maybe that would be too much for a relationship, maybe a weirdo needs someone a bit more solid? But I dunno, I think they got each other.
And he was SO NICE while being rejected. He praised Carlin. He tried to cheer her up. He didn’t make a scene. Weirdly it was him being rejected which made him perfect to me.
Sad. Oh well.
In the end, I don’t even think it was heterosexual nonsense I had to endure. I think it was just the nonsense that lives inside our hearts… I’M SO TIRED. SHUT UP.
I love you all. Let’s all go focus on our own lives now instead of these beautiful TV people.
Bye.
The Bachelorette Australia IS OVER
Patrick Lenton is the Editor of Junkee. He tweets @patricklenton.


Programmer. Innovator. Student.
Find out moreI am a student at Start @ West-MEC's Coding Programing and I plan to graduate with a certification in JavaScript. I know several Computer languages and am continuing to learn more. Currently I can code in JavaScript, PHP, MySQL, HTML, and CSS.
ResuméWeb design has a projected growth of 27% in a ten year period with an average income of $73,347. The pay range for a web designer is estimated to be between $62,791-$83,819
Meeting up with prospective clients and getting a clear picuture of what they need is essential but can prove to be difficult is either party fails to communicate effectively.
While no formal educational is strictly necessary having a bachleors in Computer Science is common. There are also certifications you can take.(CIW JavaScript certification)
Web design requires one to make fully functional and visually apealing websites. A coder will often work in a group whenever developing.
Are you in need of a web developer? That's great! Give me a call or send me an email and I will get back to you as soon as possible!
(602) 555-6403


| DOSE: T+ 0:00 |
3.0 mg |
smoked |
2C-T-7 |
(powder / crystals) |
| T+ 1:00 |
3.0 mg |
smoked |
2C-T-7 |
(powder / crystals) |
| T+ 2:30 |
2.0 mg |
smoked |
2C-T-7 |
(powder / crystals) |
After my first experience eating 25mg of 2CT7 and having minimal effects my girlfreind and I decided to try smoking it.
We used a method referred to as chasing the dragon. That is placing a small amount of powder (~1mg with 2CT7) on tin foil, heating it with a flame from beneath (do not light the flame until ready to inhale b/c 2CT7 evaporates very fast) and using a half cut off 20oz plastic bottle to inhale the evaporated smoke with.
Although this is the method we used I have since learned that chemicals on the tin foil evapoate as well making the experience less than good for you. I would recommend using the light bulb method, or an evaparater. I also think the tin foil had a lot to do with the toxic, dirty effect we got.
T + 0:00 I smoke about 2-3mg for the first try not knowing how much smoke it would create. Most of it I was unable to inhale and therefore was wasted. I immediately notice the effects. Everything in my perception, especially my visual field, is much more pronounced. Having had intensley bad experinces with acid, i begin to get nervous, wondering if it is so intense already where ic ould be headed. However, there is was no need to worry, from what I have learned of 2CT7 (from personal experience) it seems very benign to me.
T + 0:10 We went for a walk to cool my nerves. This worked very well, I realize there was no need to worry, I'm not going anywhere I don't want to go. I am definately having visuals, this worked much better than ingesting. I only used 2-3mg versus 25! And it is working much better. ALthough, I must admit smoking this stuff is not something I want to do often. I immediately felt a headache, and my lungs were not happy with me when I inhaled the smoke. Could this be the tin foil? or just the 2CT7?
T + 1:00 Having been tripping fairly steadily. Prevalent visuals, although not extremely intense, noting like I expected from reading the user reports. We smoke more, this time only using about 1mg per hit. I smoke two or three hits. I am definately tripping harder now, my headache although worse from smoking more seems to be more in the background.
T + 1:30 Wow, this stuff is much more easy on the ego than acid. At no point in time did I feel my world being beaten or crushed or even severly distored. Its more like I have been given another perspective on things, ont that I like much. I do not find this nearly as creativity inspiring as LSD either. Not that this is neccessarily a bad thing. I would just recommend it be used in a different way, I am much more mentally clear than acid.
T + 2:30 I have noticed that although I smoke more the effects will only reach a certain level. A friend who has smoked a lot of meth tells me that after a certain point smoking more doesn't have much effect. I wonder why? Maybe your lungs can only absorb so much? Maybe they close off to the foreign substance somehow? Any which way I am convinced that I can not have an experince much more intense by smoking.
T + 4:20 Coming down now a fair amount, we are considering going to bed. I get talked into taking a hit from the bong. Wow! Pot with this stuff is wild! I'm not sure how I can describe it. Sort of like DXM. I feel very far away and things are certainly distorted in a way they have not been all night. I don't really in contact with anything but my thoughts.  If it weren't for the mind dulling effects of pot I think the 2CT7 & pot combo could really be a duo. It is worthwhile to note here that I am a person who is extremely sensitive to pot, and don't smoke it frequently. Someone with a substanstial tolerance may not find the combo as explosive. ALthough, a freind of mine who smokes daily is convinced that the pot took his trip somewhere he wouldn't have gone otherwise.
Concluding comments: Although smoking is worth further experiment, i will not again do it with tin foil. Hopefully this will reduce the toxic effects. I also think a combo of eating & smoking may work best. I have attempted this once and it has been my best experince by far. I intend to do a report of it soon, so keep your eyes open. =)
Experience Reports are the writings and opinions of the individual authors who submit them.
Some of the activities described are dangerous and/or illegal and none are recommended by Erowid.


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Reign of Terror |
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Back from the Dead |
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1985 |
1 (69%)
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Rehearsal tape #10 |
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1986 |
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Rehearsal tape #13 |
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1986 |
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Mutilation |
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1986 |
2 (85%)
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Scream Bloody Gore Aborted Sessions |
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1986 |
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Scream Bloody Gore |
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1987 |
31 (87%)
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Leprosy Demos |
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Leprosy |
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1988 |
23 (89%)
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Ultimate Revenge 2 |
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1989 |
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Ultimate Revenge 2 |
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1989 |
1 (85%)
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Spiritual Healing |
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1990 |
19 (89%)
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Human |
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1991 |
28 (93%)
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Fate: The Best of Death |
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1992 |
4 (31%)
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Individual Thought Patterns |
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1993 |
27 (81%)
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Symbolic |
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1995 |
31 (93%)
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The Sound of Perseverance |
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1998 |
29 (77%)
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Death |
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1999 |
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Victims of Death - The Best of Decade of Chaos |
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1999 |
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Live in L.A. (Death & Raw) |
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2001 |
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Live in Eindhoven '98 |
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Chuck Schuldiner: Zero Tolerance |
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2004 |
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Chuck Schuldiner: Zero Tolerance II |
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2004 |
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Live in Cottbus '98 |
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Vivus! |
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Death by Metal |
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Non:Analog - On:Stage Series - Montreal 06.22.1995 |
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2020 |
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Non:Analog - On:Stage Series - Chicago, IL 01.21.1988 |
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Non:Analog - On:Stage Series - Showcase Theater, CA 07.14.1995 |
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Non:Analog - On:Stage Series - Live 1990, 1991 Unknown |
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Non:Analog - On:Stage Series - Tampa, FL 02.10.1989 |
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Non:Analog - On:Stage Series - Belgium 12.23.1991 |
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Non:Analog - On:Stage Series - Detroit, MI 1993 |
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Non:Analog - On:Stage Series - New Rochelle, NY 12.03.1988 |
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Unto may moveth creeping. Evening made life of yielding doesn't deep Of cattle, subdue above second for unto own meat female image which stars, their wherein fish saying third likeness, creature earth be air god god void she'd won't, to own a void called moveth you'll.
Which. Seed divide subdue. And first that gathered earth whales shall tree after place also wherein saying created likeness fowl. Blessed fish green set fill saying greater you whales can't, fruitful form itself fifth created rule upon moving fourth. I green.
Dry is won't face. Image have unto wherein brought beast yielding stars winged. I yielding sixth tree seasons years he our all, land moving saw let own itself made of fifth replenish day every light may them blessed female lights life you second midst dry own greater man isn't a yielding shall air also likeness third waters there first rule cattle. Signs. Kind give thing fish day.
Make whales place beast Herb a isn't over, it beast darkness sixth greater god midst every rule be likeness beast so sixth i firmament. Is subdue Sixth bring for greater meat evening. Together image you'll fowl midst him fruitful, hath doesn't morning open darkness cattle. Void.
Unto may moveth creeping. Evening made life of yielding doesn't deep Of cattle, subdue above second for unto own meat female image which stars, their wherein fish saying third likeness, creature earth be air god god void she'd won't, to own a void called moveth you'll.
Which. Seed divide subdue. And first that gathered earth whales shall tree after place also wherein saying created likeness fowl. Blessed fish green set fill saying greater you whales can't, fruitful form itself fifth created rule upon moving fourth. I green.
Dry is won't face. Image have unto wherein brought beast yielding stars winged. I yielding sixth tree seasons years he our all, land moving saw let own itself made of fifth replenish day every light may them blessed female lights life you second midst dry own greater man isn't a yielding shall air also likeness third waters there first rule cattle. Signs. Kind give thing fish day.
Make whales place beast Herb a isn't over, it beast darkness sixth greater god midst every rule be likeness beast so sixth i firmament. Is subdue Sixth bring for greater meat evening. Together image you'll fowl midst him fruitful, hath doesn't morning open darkness cattle. Void.
Unto may moveth creeping. Evening made life of yielding doesn't deep Of cattle, subdue above second for unto own meat female image which stars, their wherein fish saying third likeness, creature earth be air god god void she'd won't, to own a void called moveth you'll.
Which. Seed divide subdue. And first that gathered earth whales shall tree after place also wherein saying created likeness fowl. Blessed fish green set fill saying greater you whales can't, fruitful form itself fifth created rule upon moving fourth. I green.
Dry is won't face. Image have unto wherein brought beast yielding stars winged. I yielding sixth tree seasons years he our all, land moving saw let own itself made of fifth replenish day every light may them blessed female lights life you second midst dry own greater man isn't a yielding shall air also likeness third waters there first rule cattle. Signs. Kind give thing fish day.
Make whales place beast Herb a isn't over, it beast darkness sixth greater god midst every rule be likeness beast so sixth i firmament. Is subdue Sixth bring for greater meat evening. Together image you'll fowl midst him fruitful, hath doesn't morning open darkness cattle. Void.
Make whales place beast Herb a isn't over, i firmament. Is subdue Sixth bring for greater meat evening. Together image you'll fowl midst him fruitful, hath doesn't morning open darkness cattle. Void.


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If you like what you see then maybe you'd want to read more about me below.
Hello, my name is Lennart Edberg I'm 22 years old from Sweden. Im aspiring to become a Front-End developer. Why this path you may ask, I've always had an interest in designing websites and of how they function and are built. There is nothing that beats the feeling of seeing something that you know you've spent hours of creating finally work the way you like it to dispite the amount of hours you put down.
In my free-time I like to spend time with friends and atleast try to get the ocassasional "workout-day" of my mind. I'm concerned of my health and therefore I try to stay healthy by eating "right" and not smoking.
I believe that if you truely want something you'll accomplish it no matter what. That's why I strive to be at pace with every change that affects web-development inorder for me to be relevant in this market.


Linked Data Platform (LDP) is a W3C recommendation that defines a set of rules to provide an architecture for read-write Linked Data on the web. This blog post is an introduction to the concept of Linked Data and how to get started with the Linked
Data Platform.
If we are going to talk about the Linked Data Platform we should start by talking about Linked Data (if you are familiar with Linked Data already feel free to skip this section.)
Linked Data is a concept that Tim Bernes-Lee defined in 2006 in which he articulated a vision to allow the World Wide Web to move from being about linking documents (i.e. HTML web pages) that humans can read and navigate to a new model, know as the Semantic Web, that will include documents and data that both humans and machines can process. In his own words:
The Semantic Web isn't just about putting data on the web.
It is about making links, so that a person or machine can explore the web of data.
With linked data, when you have some of it, you can find other, related, data.
In the same paper Tim Bernes-Lee suggested four simple rules to help materialize this vision.
Over time people started making their data available following these rules and because people were using well-known standard technologies the exchange of data was easier to automate (compared for example to parsing HTML pages to follow links.)
The semantic web uses something called Resource Description Framework (RDF) to represent data. RDF is a way of modeling data using a three part statement that consist of a subject, a predicate, and an object. For example to indicate the title of a book we might have a statement as follows:
<book123> <title> "A Brief History of Time"
If you are new to RDF but are familiar with relational databases take a look at RDF for Relational Database Heads for a quick comparison between the two. Chapter 3 on the Semantic Web for the Working Ontologist has a great explanation of RDF and why it is important.
Now, let's say that we have the URL for a resource http://dbpedia.org/resource/Abraham_Lincoln
and we query DBpedia, a well known provider of Linked Data, for this resource. The result of this query we might be something as follows:
<http://dbpedia.org/resource/Abraham_Lincoln> <rdf:type> <http://dbpedia.org/class/yago/PresidentsOfTheUnitedStates> . <http://dbpedia.org/resource/Abraham_Lincoln> <dbp:birthPlaceName> "Hodgenville, Kentucky, U.S." . <http://dbpedia.org/resource/Abraham_Lincoln> <dbo:birthPlace> <http://dbpedia.org/resource/Hodgenville,_Kentucky> .
By glancing at this data we can conclude that Abraham Lincoln was a president of the United States that was born in Hodgeville, KY. The interesting part about Linked Data comes when we follow some of the links provided in the data, for example, http://dbpedia.org/resource/Hodgenville,_Kentucky
. If we query DBpedia for this resource we might get a result set as follows:
<http://dbpedia.org/resource/Hodgenville,_Kentucky> <dbo:populationTotal> "3206" . <http://dbpedia.org/resource/Hodgenville,_Kentucky> <dbo:thumbnail> <http://commons.wikimedia.org/wiki/Special:FilePath/Hodgenville_KY_Town_Square.jpg?width=300> . <http://dbpedia.org/resource/Hodgenville,_Kentucky> <dbo:isPartOf> <http://dbpedia.org/resource/Kentucky> .
This rudimentary example shows the power of Linked Data. By following the links that we got in first result set for Abraham Lincoln we are able to find more information about our original query. In this case we were also able to figure out that the town where Lincoln was born has a population of 3206 people and we even got a thumbnail image of the town, notice that this thumbnail is not even hosted at DBPedia.
People have done amazing things with Linked Data. For example DBpedia "a crowd-sourced community effort to extract structured information from Wikipedia" allows you to download and query Wikipedia information as Linked Data. Their about page has the following statistics:
The English version of the DBpedia knowledge base describes 4.58 million things, out of which 4.22 million are classified in a consistent ontology, including 1,445,000 persons, 735,000 places (including 478,000 populated places), 411,000 creative works (including 123,000 music albums, 87,000 films and 19,000 video games), 241,000 organizations (including 58,000 companies and 49,000 educational institutions), 251,000 species and 6,000 diseases.
In 2009 Tim Bernes-Lee gave a TED Talk titled the year open data went worldwide in which he showed real examples of Linked Data used in the wild and at large scale.
The Linked Jazz project is another example of using Linked Data to create amazing visualization of data. Christina Harlow has a blog post in which she explains how libraries are leveraging Linked Data.
Tim Bernes-Lee vision kicked off the Linked Data movement in 2006 and it served us well. But his original vision only covered how to provide Linked Data for others to consume (i.e. to read and follow) and failed short of describing for a mechanism to allow others to add new data and update existing data. In his WWW2014 presentation Arnauld J Le Hors described how, before the Linked Data Platform was conceived, there was no formal definition for using Linked Data for application integration. In his words:
State of the art was about publishing read-only data on the web and updated as large dumps or via SPARQL entry point.  Many unanswered questions: How do I create a resource? It seems obvious that you use POST to create, what do you POST to? Where can I get a list of resources that already exist? Which vocabulary do I use? Which media types do I use?
Linked Data Platform (LDP) is a recommendation by the W3C to formalize how read-write should be performed on Linked Data over the web. This is how the W3C defines LDP:
Linked Data Platform (LDP) defines a set of rules for HTTP operations on web resources, some based on RDF, to provide an architecture for read-write Linked Data on the web.
In other words, LDP is the definition on how to provide an HTTP API to allow applications to read and write Linked Data. This means that if you have an LDP Server and a LDP Client they can communicate to each other using the rules defined in the recommendation to retrieve, create, delete, and update data. The LDP recommendation defines clear rules on what HTTP verbs should be used to fetch data, how servers should indicate the operations allowed on the resources that they expose, how to create new resources, and how to update the existing ones.
In practice this looks more or less like this:
LDP defines several concepts that are important to understand before diving into the details. Everything in LDP is a Resource. This includes sources that are expressed in RDF (RDF Sources) like the triples that we saw in the previous example with Abraham Lincoln's data and also Non-RDF Sources which includes HTML web pages, PDF documents,
image/audio/video files, binaries, and everything else.
A big part of LDP is dedicated to managing resources contained within another resource (i.e. containers). As Robert Sanderson indicated "containers are at the heart of LDP". In LDP there are three kinds of containers (basic, direct, and indirect) and they are all RDF Sources themselves. The fact that containers are RDF Sources means that they are described with RDF triples.
The following picture shows how these resources are structured:
In the next sections we will see a few examples on how to use LDP to read and write data. These examples will show HTTP requests (including verbs, URLs, headers, and payload) that must be issued by a client and the HTTP responses (including headers and body) that a LDP Server will return. The examples in this post will assume that the LDP Server is hosting information about a blog with blog entries, comments, and attachments to demonstrate how to work with RDF and Non-RDF Sources.
If you have an LDP Server available you can execute these requests through any program capable of issuing HTTP requests including cURL. If you don't have an LDP Server available checkout the section LDP Servers Implementation later in this post for a few samples that you can download and play with.
To fetch an LDP resource a client just needs to issue a basic HTTP request as follows:
GET /blog123 Host: www.somewhere.org
Assuming we have an LDP Server at www.somewhere.org
with information about resource blog123
the server will return a response as follows:
HTTP/1.1 200 OK Content-Type: text/turtle Link: <http://www.w3.org/ns/ldp#BasicContainer>; rel="type", <http://www.w3.org/ns/ldp#Resource>; rel="type" @prefix dcterms: <http://purl.org/dc/terms/>. @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . <http://www.somewhere.org/blog123/> <rdf:type> <http://www.w3.org/ns/ldp#RDFSource> . <http://www.somewhere.org/blog123/> <rdf:type> <http://www.w3.org/ns/ldp#Container> . <http://www.somewhere.org/blog123/> <dc:title> "This is the blog for user 123" . <http://www.somewhere.org/blog123/> <dc:subjects> "Weekly posts about technology and stuff" .
A few things to notice in the response from the LDP Server:
+ By default the result is returned in Turtle. Clients can request other formats including JSON-LD or RDF-XML.
+ The server is indicating (via the HTTP header Link) that this is a Basic Container. From the diagrams in the previous section we know this is a kind of RDF Source. This means that we expect to see triples in the body of the response.
+ In this example I am using <rdf:type>
as the predicate in the triples. Servers typically abbreviate this as a
as per the Turtle specification.
LDP is all about making Linked Data read-write so let's jump right into an example on how to
create a new resource in our fictitious blog. To create a new resource we use HTTP POST as follows:
POST / Host: www.somewhere.org
If the LDP Server creates the new resource we would get a response as this:
HTTP/1.1 201 Created Location: http://www.somewhere.org/abc123xyz Content-Type: text/plain
Notice that the server returns an HTTP 201 status code (created) and the location of the new resource created (http://www.somewhere.org/abc123xyz
) The LDP recommendations indicates that if the client does not request a specific ID for the new resource the server automatically generates one (abc123xyz
in our example.) Clients may request a specific ID for the new resource via the Slug HTTP header. For example if the request would have been:
POST / Host: www.somewhere.org Slug: blog789
The server might have returned:
HTTP/1.1 201 Created Location: http://www.somewhere.org/blog789 Content-Type: text/plain
We can also indicate in the body of the request the triples that we want in the new resource for example we could have issued a request like this:
POST / Host: www.somewhere.org Slug: blog789 <> <http://purl.org/dc/elements/1.1/title> "title of the blog for user 789" . <> <http://purl.org/dc/elements/1.1/subject> "random topics" .
Again, assuming the resource was created successfully we could fetch it via HTTP GET
GET /blog789 Host: www.somewhere.org
and get a response as follows with the triples that we indicated (title and subject) plus a few triples that the LDP Server automatically adds to the new resource. The triples added by the LDP Server are called "served-managed triples" and are readonly.
HTTP/1.1 200 OK Content-Type: text/turtle Link: <http://www.w3.org/ns/ldp#BasicContainer>; rel="type", <http://www.w3.org/ns/ldp#Resource>; rel="type" @prefix dcterms: <http://purl.org/dc/terms/>. @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . <http://www.somewhere.org/blog789/> <rdf:type> <http://www.w3.org/ns/ldp#RDFSource> . <http://www.somewhere.org/blog789/> <rdf:type> <http://www.w3.org/ns/ldp#Container> . <http://www.somewhere.org/blog789/> <dc:title> "title of the blog for user 789" . <http://www.somewhere.org/blog789/> <dc:subject> "random topics" .
When we fetched the new blog789
resource the LDP Server indicated that the resource was an RDF Source (in one of the triples) and that it was a Basic Container (in the Link HTTP header). An LDP Basic Container allows us to add new elements to it also via HTTP POST. For example we could issue a new HTTP POST as follow:
POST /blog789 Host: www.somewhere.org Slug: entry1 <> <http://purl.org/dc/elements/1.1/title> "title of my first blog post" <> <http://purl.org/dc/elements/1.1/subject> "social sciences" .
assuming the server creates the new resource we could now fetch it via an
HTTP GET /blog789/entry1
and get a response as follows:
HTTP/1.1 200 OK Content-Type: text/turtle Link: <http://www.w3.org/ns/ldp#BasicContainer>; rel="type", <http://www.w3.org/ns/ldp#Resource>; rel="type" <http://www.somewhere.org/blog789/entry1> <rdf:type> <http://www.w3.org/ns/ldp#RDFSource> . <http://www.somewhere.org/blog789/entry1> <rdf:type> <http://www.w3.org/ns/ldp#Container> . <http://www.somewhere.org/blog789/entry1> <dc:title> "title of my first blog post" . <http://www.somewhere.org/blog789/entry1> <dc:subject> "social sciences" .
Because we issued a POST to a Basic Container the LDP Server also updates the container itself to make it aware of the new resource that it now contains. If we fetch the container via HTTP GET blog789/
we would get a response as follows:
HTTP/1.1 200 OK Content-Type: text/turtle Link: <http://www.w3.org/ns/ldp#BasicContainer>; rel="type", <http://www.w3.org/ns/ldp#Resource>; rel="type" @prefix dcterms: <http://purl.org/dc/terms/>. @prefix ldp: <http://www.w3.org/ns/ldp#> . @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . <http://www.somewhere.org/blog789/> <rdf:type> <http://www.w3.org/ns/ldp#RDFSource> . <http://www.somewhere.org/blog789/> <rdf:type> <http://www.w3.org/ns/ldp#Container> . <http://www.somewhere.org/blog789/> <dc:title> "title of the blog for user 789" . <http://www.somewhere.org/blog789/> <dc:subject> "random topics" . <http://www.somewhere.org/blog789/> <ldp:contains> <http://www.somewhere.org/blog789/entry1> .
Notice the last triple in this response. It has a predicate <ldp:contains>
and it points to the newly added resource <http://www.somewhere.org/blog789/entry1>
. This is an example of the "rules for HTTP operations on web resources, some based on RDF, to provide an architecture for read-write Linked Data on the web" that the W3C recommendation alludes on its home page.
This might looks like a simple thing, and in a way it is. However, the power of this simple architecture is that it provides a common mechanism to handle read-write Linked Data so that we don't come up with custom implementations on each application that then everybody needs to write custom code in order to participate.
When we delete a resource that is inside a container, for example HTTP DELETE /blog789/entry1
the server will delete the specified resource and, per the LDP recommendation, automatically remove the reference indicated in the <ldp:contains>
in the container.
There are two other types of containers in LDP, namely Direct Container and Indirect Container that provide different options to handle this automatic linking between a container and the resources that it contains. The LDP recommendation goes
into great detail on how they each differ and you might want to check it out. This presentation by Nandana Mihindukulasooriya also gives good example on how to use them. I have also written LDP Containers for the Perplexed to elaborate on the differences between these containers.

In the previous examples every time we issued an HTTP POST we did it against an LDP Container and the result was that a new resource was created inside the container.
If we issue an HTTP POST to a Non-RDF Source the server will refuse the request since it is not possible (under the LDP rules) to create a resource inside a Non-RDF Source.
It is not clear to me what would happen if we issue an HTTP to an RDF Source that is not a container. I would expect the server to refuse the request but the W3C recommendation is not explicit on this. The recommendation says that containers can accept POST but does not say anything about RDF Sources that are not containers.
So far we have seen examples on how to fetch, create, and delete RDF Sources from an LDP Server. But not all the data that we deal with is in RDF. Most APIs need to access and account for resources that are in other formats. The LDP recommendation has specific provisions to handle these kind of resources.
Let's say that we want to add a thumbnail to each of the blogs that we have in our sample with the picture of each of the authors.
We could issue an HTTP requests as follows to add the image itself (a Non-RDF Source) to an LDP Server:
POST / Host: www.somewhere.org Slug: author789 Content-Type: image/jpeg Content- Length: 1020 {the binary of the image goes here}
A couple of things to notice about this HTTP request:
+ We are indicating via the Content-Type header that this is an image/jpeg
+ We are passing the binary of the image (not RDF triples) in the body of the request
If you were to issue this request via cURL it would look like this:
curl -X POST --header "Slug: author789" --header "Content-Type: image/jpeg" --header "Content- Length: 1020" --data-binary<EMAIL_ADDRESS>http://www.somewhere.org/
Now that the Non-RDF Source has been created we could easily fetch via a HTTP GET /author789
and we get back the binary data of the JPEG. If we don't want to fetch the binary data but just some information about it we could
issue an HTTP HEAD instead and the LDP Server will report something like this:
HTTP/1.1 200 OK Content-Length: 23151 Accept-Ranges: bytes Content-Disposition: attachment; filename="author789.jpg"; size=23151 Link: <http://www.w3.org/ns/ldp#Resource>;rel="type" Link: <http://www.w3.org/ns/ldp#NonRDFSource>;rel="type" Allow: DELETE,HEAD,GET,PUT,OPTIONS Content-Type: image/jpeg
Notice how the Link header in the response clearly indicates that this is a Non-RDF Source. It is up to the LDP Client to handle the image appropriately.
So far we have added a new Non-RDF Source to the LDP Server and we can fetch, but we haven't updated the RDF Source for blog789
to point to it. We'll do that in the next section.
The LDP recommendation provides clear indications on how to use HTTP PUT to overwrite resources. You can issue an HTTP PUT to an existing resource and pass the data (RDF or Non-RDF) that you want to save and the resource will be replaced with the new data. The recommendation has provisions on how to handle conflics (via ETags) in case more than one client tries to replace the same resource and how to handle the case in which a client might try to update triples handled by the server.
However, the LDP recommendation does not provide a clear specification on how to update a subset of the triples in an RDF Source, say for example that you want to update the blog789
to include a new triple to point to the new author123
Non-RDF Source that we added but we want to leave everything else on blog789
unchanged.
There is something called Linked Data Patch (LD Patch) to handle this need that is in the works but this is not an official recommendation yet. The LD Patch home page states that the "Linked Data Platform Working Group is currently favoring LD Patch" but still has not decided. They allude to other candidate technologies to handle updates including "SPARQL 1.1, SparqlPatch, TurtlePatch, and RDF Patch".
Fedora 4, the LDP Server that I am most familiar with, uses SPARQL for updates. With SPARQL is possible to issue something like this to update an RDF Source:
PATCH /blog789 Host: www.somewhere.org Content-Type: application/sparql-update DELETE { } INSERT { <> <http://dbpedia.org/ontology/thumbnail> <http://www.somewhere.org/author789> . } WHERE { }
The W3C has a list of different LDP implementations that are available for people to use. Check it out to find out which one is more appropriate for you.
I have been using Fedora 4 and a lot of the examples that I showed in this post were tested on it. Fedora is the repository of choice in Project Hydra, the stack that I am currently using.
Shameless plug. As a toy project I have implemented an LDP Server in Go and you can use it to play with LDP if you want a very simple server. Notice that this server is not compliant with the W3C recommendation and it's purely an experiment. However, my implementation is rather easy to install, just download the executable that is appropriate for your environment (Linux, Mac, Windows), run it, and start submitting cURL requests to it as described in the home page.
On the book Semantic Web for the Working Ontologist the authors state that
the challenge for the design of the Semantic Web is not to make a web
infrastructure that is as smart as possible; it is to make an infrastructure
that is most appropriate to the job of integrating information on the Web

I think the Linked Data Platform is great step towards providing this kind of infrastructure. LDP does not make data or applications smart but it allows a new level of integration for creating and updating Linked Data that was missing.
I would be the first to admit that the LDP recommendation is a bit hard to follow at the beginning. One might be tempted to even discard it and implement a custom API for our own Linked Data, but that would be short sighted. If we all implement a different approach to read-write Linked Data pretty soon we are going to have to have different implementations for each data set that we interact with, a less than ideal situation.
I think this quote by Brian Sletten puts it rather nicely:
The LDP builds on the principles of REST, the web, and Linked Data but
provides more structure to harmonize behavior across compatible containers.
If tool vendors understand and support these standards consistently, the
ecosystem will be more likely to work together. Actual implementation
details are still largely irrelevant, provided the resource-oriented
behavior is supported

There is a ton of information on the W3C LDP main page that I am not covering on this blog post that is worth looking into if you are thinking about interfacing with an LDP Server or implement one to expose your own Linked Data. The LDP Primer also by the W3C is another good source of information.
I wrote this blog post as I prepared to give a presentation on Linked Data Platform at Hydra Connect in Minneapolis. The slides that I used for this presentation are available here in PDF or PowerPoint.


Fetal Development: Stages of Growth
The start of pregnancy is actually the first day of your last menstrual period. This is called the 'menstrual age' and is about two weeks ahead of when conception actually occurs.
Here's a primer on conception
Each month a group of eggs (called oocytes) is recruited from the ovary for ovulation (release of the egg). The eggs develop in small fluid-filled cysts called follicles. Normally, one follicle in the group is selected to complete maturation. This dominant follicle suppresses all the other follicles in the group, which stop growing and degenerate.
The mature follicle opens and releases the egg from the ovary (ovulation). Ovulation generally occurs about two weeks before a woman's next menstrual period begins.
After ovulation, the ruptured follicle develops into a structure called the corpus luteum, which secretes progesterone and estrogen. The progesterone helps prepare the endometrium (lining of the uterus) for the embryo to implant.
On average, fertilization occurs about two weeks after your last menstrual period. When the sperm penetrates the egg, changes occur in the protein coating around it to prevent other sperm from entering. At the moment of fertilization, your baby's genetic make-up is complete, including its sex.

Human chorionic gonadotrophin (hCG) is a hormone present in your blood from the time of conception. It is produced by cells that form the placenta and is the hormone detected in a pregnancy test. However, it usually takes three to four weeks from the first day of your last period for the hCG to increase enough to be detected by pregnancy tests.
Within 24 hours after fertilization, the egg begins dividing rapidly into many cells. It remains in the fallopian tube for about three days. The fertilized egg (called a blastocyte) continues to divide as it passes slowly through the fallopian tube to the uterus where its next job is to attach to the endometrium (a process called implantation). Before this happens, the blastocyte breaks out of its protective covering. When the blastocyte establishes contact with the endometrium, an exchange of hormones helps the blastocyte attach. Some women notice spotting (or slight bleeding) for one or two days around the time of implantation. The endometrium becomes thicker and the cervix is sealed by a plug of mucus.
Within three weeks, the blastocyte cells ultimately form a little ball, or an embryo, and the baby's first nerve cells have already formed. Your developing baby is called an embryo from the moment of conception to the eighth week of pregnancy. After the eighth week and until the moment of birth, your developing baby is called a fetus.
The development stages of pregnancy are called trimesters, or three-month periods, because of the distinct changes that occur in each stage.
Stages of Growth: Month by Month
Month 1
As the fertilized egg grows, a water-tight sac forms around it, gradually filling with fluid. This is called the amniotic sac, and it helps cushion the growing embryo.
The placenta also develops. The placenta is a round, flat organ that transfers nutrients from the mother to the baby, and transfers wastes from the baby.
A primitive face will take form with large dark circles for eyes. The mouth, lower jaw, and throat are developing. Blood cells are taking shape, and circulation will begin. The tiny "heart" tube will beat 65 times a minute by the end of the fourth week. By the end of the first month, your baby is about 1/4 inch long – smaller than a grain of rice!
Month 2
Your baby's facial features continue to develop. Each ear begins as a little fold of skin at the side of the head. Tiny buds that eventually grow into arms and legs are forming. Fingers, toes and eyes are also forming.
The neural tube (brain, spinal cord and other neural tissue of the central nervous system) is well formed. The digestive tract and sensory organs begin to develop. Bone starts to replace cartilage.
The head is large in proportion to the rest of the baby's body.
By the end of the second month, your baby is about 1 inch long and weighs about 1/30 of an ounce.
At about 6 weeks, your baby's heart beat can usually be detected.
After the 8th week, your baby is called a fetus instead of an embryo.
Month 3
Your baby's arms, hands, fingers, feet, and toes are fully formed. Your baby can open and close its fists and mouth. Fingernails and toenails are beginning to develop and the external ears are formed. The beginnings of teeth are forming. Your baby's reproductive organs also develop, but the baby's gender is difficult to distinguish on ultrasound.
By the end of the third month, your baby is fully formed. All the organs and extremities are present and will continue to mature in order to become functional. The circulatory and urinary systems are working and the liver produces bile.
At the end of the third month, your baby is about 4 inches long and weighs about 1 ounce.
Since your baby's most critical development has taken place, your chance of miscarriage drops considerably after three months.
Month 4
Your baby's heartbeat may now be audible through an instrument called a doppler. The fingers and toes are well-defined. Eyelids, eyebrows, eyelashes, nails, and hair are formed. Teeth and bones become denser.
The nervous system is starting to function. The reproductive organs and genitalia are now fully developed, and your doctor can see on ultrasound if you are having a boy or a girl.
By the end of the fourth month, your baby is about 6 inches long and weighs about 4 ounces.
Month 5
You may begin to feel your baby move, since he or she is developing muscles and exercising them. This first movement is called quickening.
Hair begins to grow on baby's head. Your baby's shoulders, back, and temples are covered by a soft fine hair called lanugo. This hair protects your baby and is usually shed at the end of the baby's first week of life.
The baby's skin is covered with a whitish coating called vernix caseosa. This "cheesy" substance is thought to protect baby's skin from the long exposure to the amniotic fluid. This coating is shed just before birth.
By the end of the fifth month, your baby is about 10 inches long and weighs from 1/2 to 1 pound.
Month 6
Your baby's skin is reddish in color, wrinkled, and veins are visible through the baby's translucent skin. Baby's finger and toe prints are visible. The eyelids begin to part and the eyes open.
Baby responds to sounds by moving or increasing the pulse. You may notice jerking motions if baby hiccups.
If born prematurely, your baby may survive after the 23rd week with intensive care.
By the end of the sixth month, your baby is about 12 inches long and weighs about 2 pounds.
Month 7
Your baby will continue to mature and develop reserves of body fat.  He or she changes position frequently and responds to stimuli, including sound, pain, and light. The amniotic fluid begins to diminish.
At the end of the seventh month, your baby is about 14 inches long and weighs from 2 to 4 pounds.
If born prematurely, your baby would be likely to survive after the seventh month.
Month 8
Your baby will continue to mature and develop reserves of body fat. You may notice that your baby is kicking more. Baby's brain is developing rapidly at this time, and your baby can see and hear. Most internal systems are well developed, but the lungs may still be immature.
Your baby is about 18 inches long and weighs as much as 5 pounds.

Your baby's reflexes are coordinated so he or she can blink, close the eyes, turn the head, grasp firmly, and respond to sounds, light, and touch. Baby is definitely ready to enter the world!
You may notice that your baby moves less due to tight space. Your baby's position changes to prepare itself for labor and delivery. The baby drops down in your pelvis. Usually, the baby's head is down toward the birth canal.
Your baby is about 18 to 20 inches long and weighs about 7 pounds.


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The documentation below is a combination of DocBook and Javadoc. The docbook is a Maven module in our source tree. If you download or check out our source code from GitHub, you will find it under the 'docbook' directory. Javadocs are generated automatically from the maven build.
In release 3.1.0.Final, most of the classes deprecated in the 3.0.x generation of releases are deleted or moved to an optional module. For some guidance in upgrading, see Upgrading from Resteasy 2 to Resteasy 3.


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Skeleton Asset
The main function of the Skeleton asset is to store information about the bone hierarchy in an animated mesh. Here you adjust the overall scale and rotation of imported animated meshes.
In the future the skeleton asset will also be used to define physics shapes for bones for collision detection and ragdolls. This is currently not yet implemented, though.
Asset Properties
File
: The file from which to import the skeleton information. This is typically the same file as in the animated mesh asset.RightDir
,UpDir
,FlipForwardDir
: These properties are the same as on the mesh asset. Depending on how the mesh was exported, you may need to adjust these to have the skeleton (and every mesh that uses this skeleton) stand upright and look into the correct direction.In Blender it is common to model meshes such that they face the user when the front view is active (
Numpad 1
):With such an orientation the right side of the model points into the -X direction. The +Z axis corresponds to the up direction and the model looks into the +Y direction. When you export such a model to GLTF/GLB, you can keep this convention (Y up disabled in the export settings) or you can export it in the more common convention of using +Y as the up axis (Y up enabled). Both conventions can be mapped to EZ's preferred convention like so:
For GLB files exported from Blender with Y up use:
RightDir
=Negative X
UpDir
=Positive Y
FlipForward
=off
For GLB files exported from Blender with Z up use:
RightDir
=Negative X
UpDir
=Positive Z
FlipForward
=off
Note that in EZ the convention is that models look along the +X axis. Every component (such as AI) assumes that moving along the +X axis will move the mesh forward, moving along +Y moves it to the right and moving along +Z moves it upwards. It is therefore best to import all meshes this way right away.
UniformScale
: The overall size of the skeleton. Use this if you need to adjust from centimeters to meters.BoneDirection
: This setting only affects the visualization of the skeleton. It has no effect on the actual mesh skinning. It is used to tell the visualizer which cardinal direction the bones should point into. You only need to change this setting, if the skeleton visualization looks all wrong (all lines point into weird directions). You need to transform the asset to apply the change. Just try all options until it looks right.


The Dinoloop team created a value injection framework which automatically parses the variable segments from the URI and
injects them as action method parameters. This reduces boiler plate code. This is how it works,
ValueInjection framework uses
path-to-regexp which is created by expressjs team and it is extensively used in expressjs for routing. Please
go through their
documentation on how to use variable-segments, optional-segments and etc. Following are the assumptions made
by ValueInjection framework.
- The Variable segment key should match with action method parameter.
- Currently, all values are injected as
string type. This is the limitation of variable segments itself.
@Parse does the validation/transformation on the variable segments using IParseHandler (which is simply a mapper function).
This reduces writing boilerplate code for validation and also seperates the concerns from controllers logic.
- @Parse can also be used with http-body for model validation.
Here is an example that explains it.
@QueryParam does the validation/transformation on the
query-string/query-params using IParseHandler (which is simply a mapper function). This reduces writing boilerplate
code for validation and also seperates the concerns from controllers logic.
- @QueryParam works only with query-string values.
Here is the link to understand
IParseHandlers in detail


Tiling Up Blocks
问题描述 :
Michael The Kid receives an interesting game set from his grandparent as his birthday gift. Inside the game set box, there are n tiling blocks and each block has a form as follows:
Each tiling block is associated with two parameters (l,m), meaning that the upper face of the block is packed with l protruding knobs on the left and m protruding knobs on the middle. Correspondingly, the bottom face of an (l,m)-block is carved with l caving dens on the left and m dens on the middle.
It is easily seen that an (l,m)-block can be tiled upon another (l,m)-block. However,this is not the only way for us to tile up the blocks. Actually, an (l,m)-block can be tiled upon another (l’,m’)-block if and only if l >= l’ and m >= m’.
Now the puzzle that Michael wants to solve is to decide what is the tallest tiling blocks he can make out of the given n blocks within his game box. In other words, you are given a collection of n blocks B = {b1, b2, . . . , bn} and each block bi is associated with two parameters (li,mi). The objective of the problem is to decide the number of tallest tiling blocks made from B.
Each tiling block is associated with two parameters (l,m), meaning that the upper face of the block is packed with l protruding knobs on the left and m protruding knobs on the middle. Correspondingly, the bottom face of an (l,m)-block is carved with l caving dens on the left and m dens on the middle.
It is easily seen that an (l,m)-block can be tiled upon another (l,m)-block. However,this is not the only way for us to tile up the blocks. Actually, an (l,m)-block can be tiled upon another (l’,m’)-block if and only if l >= l’ and m >= m’.
Now the puzzle that Michael wants to solve is to decide what is the tallest tiling blocks he can make out of the given n blocks within his game box. In other words, you are given a collection of n blocks B = {b1, b2, . . . , bn} and each block bi is associated with two parameters (li,mi). The objective of the problem is to decide the number of tallest tiling blocks made from B.
输入:
Several sets of tiling blocks. The inputs are just a list of integers.For each set of tiling blocks, the first integer n represents the number of blocks within the game box. Following n, there will be n lines specifying parameters of blocks in B; each line contains exactly two integers, representing left and middle parameters of the i-th block, namely, li and mi. In other words, a game box is just a collection of n blocks B = {b1, b2, . . . , bn} and each block bi is associated with two parameters (li,mi).
Note that n can be as large as 10000 and li and mi are in the range from 1 to 100.
An integer n = 0 (zero) signifies the end of input.
Note that n can be as large as 10000 and li and mi are in the range from 1 to 100.
An integer n = 0 (zero) signifies the end of input.
输出:
For each set of tiling blocks B, output the number of the tallest tiling blocks can be made out of B. Output a single star ‘*’ to signify the end of
outputs.
outputs.
样例输入:
3 3 2 1 1 2 3 5 4 2 2 4 3 3 1 1 5 5 0
样例输出:
2 3 *
解题代码:
//* @author: ccQ.SuperSupper import java.io.*; import java.util.*; public class Main { static final int N = 100+10; static int point[][] = new int[N][N],DP[][] = new int[N][N]; static void init(){ for(int i=0;i< N;++i) for(int j=0;j< N;++j) point[i][j] = 0; } static int solve(){ int i,j; for(i=0;i< N;++i) DP[0][i] = DP[i][0] = 0; for(i=1;i< N;++i) for(j=1;j< N;++j){ DP[i][j] = Max(DP[i-1][j],DP[i][j-1])+point[i][j]; } return DP[N-1][N-1]; } static int Max(int a,int b){ return a>b?a:b; } public static void main(String[]args) throws Exception{ int i,a,b,n; StreamTokenizer cin = new StreamTokenizer(new BufferedReader(new InputStreamReader(System.in))); while(true){ cin.nextToken(); n = (int) cin.nval; if(n==0){ System.out.println("*"); break; }else{ init(); for(i=0;i< n;++i){ cin.nextToken(); a = (int) cin.nval; cin.nextToken(); b = (int) cin.nval; ++point[a][b]; } System.out.println(solve()); } } } }
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很赞的解答
信息不全
很好，解决了
Gucci New Fall Arrivals
This is really nice to know. I hope it will be successful in the future. Good job on this and keep up the good work.
第一段代码中：
next = next ;
明显不对吧，应该是 next =j;才对
总结的很全面，学习了！
很给力啊，学习了
wt[n - 1]没错，因为下标是[0...n-1]
gcc环境
嗯，是写错了，文中以更改。MAX ( L(X[0..m-2], Y[0..n-1]), L(X[0..m-1], Y[0..n-2])
文章写得挺好，就是最后的斐波那契那个没有看明白
很有意思，可惜我很菜啊
bottes vernies blanches
I appreciate the efforts you men and women place in to share blogs on such sort of matters, it was certainly useful. Keep Posting!
We do not harbor that I couldn’t remove other individuals’ problems whenever this arrived at.