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traditional-finance
Source⧉Crypto
traditional-finance
the federal reserve, fractional lending, etc
51 messages
⧉infominer
22-Aug-18 11:42 PM
@ummjackson @jimmysong The Cantillon effect: "the first ones to receive the newly created money see their incomes rise whereas the last ones to receive the newly created money see their purchasing power decline as consumer price inflation comes about."
https://t.co/glvGFWi...
Likes
135
Twitter
⧉infominer
26-Aug-18 12:25 AM
Want to know why the USA will eventually be stripped as the reserve currency of the world?
Just take a look at this:
Retweets
294
Likes
438
Twitter
StLouisFed: "Corporate profits and employee wages have tracked each other closely for decades—until the mid 2000s, when profits leaped out in front." Let me see, we had the $2008 Financial Crisis, lost 9MM workers and then the US gov't IOU'd $1.2T/yr for 9 yrs ($11...
Twitter
⧉infominer
30-Aug-18 07:16 PM
Currency against US Dollar, past year.
Venezuela: -2,000,000%
Sudan: -168%
Turkey: -67%
Argentina: -65%
Angola: -57%
Iran: -30%
Brazil: -21%
Ethiopia: -18%
Pakistan: -17%
Russia: -13%
Sweden: -12%
Tunisia: -11%
Nicaragua: -8%
Indonesia: -8%
Myanmar: -8%
Haiti: -8%
India: ...
Retweets
2102
Likes
2520
Twitter
⧉infominer
30-Aug-18 07:30 PM
1/ Just finished @andrewrsorkin’s “Too Big to Fail.” What a masterpiece in storytelling— a front row seat of the 2008 Financial Crisis.
Likes
184
Twitter
⧉infominer
30-Aug-18 07:37 PM
The Institutional Risk Analyst is a weekly commentary published by Whalen Global Advisors LLC in New York City
⧉infominer
30-Aug-18 08:20 PM
Sorry to burst your bubble, folks, but the Fed has never been independent. The president and Senate pick the Board of Governors. C'mon. https://t.co/gBhQuhLiLF
Twitter
⧉infominer
04-Sep-18 12:53 AM
The US Securities and Exchange Commission has revealed daring plans for investment in private companies, with the potential to open the doors to Main St. in a way that could prove more inclusive to mom and pop investors than any regulation in years. Read between the lines, th...
⧉infominer
04-Sep-18 11:48 AM
archived 30 Aug 2018 22:48:10 UTC
⧉infominer
08-Sep-18 08:19 PM
The financial elites were responsible for putting through the Fed as a governmentally created and sanctioned cartel device to enable the nation's banks to inflate the money supply in a coordinated fashion.
⧉infominer
08-Sep-18 08:26 PM
Bill Stills Channel: Copyright Disclaimer Under Section 107 of the Copyright Act 1976, allowance is . THE MONEY MASTERS is a historical documentary that trac...
All rights belong to Paul Grignon https://www.youtube.com/user/PaulLWGrignon I just put them together so you can play the whole thing as one ;) Greetz eRX
⧉infominer
17-Sep-18 12:56 PM
Listen to The Bitcoin Game episodes free, on demand. Welcome to episode 54 of The Bitcoin Game, I'm Rob Mitchell. Back in 2015, I had been waiting and waiting for a Bitcoin conference to be held here in Los Angeles. I finally gave up and booked a trip to the 2015 Texas Bitco...
good discussion about how international transactions work and how banks hold our money.
(edited)
⧉infominer
22-Sep-18 09:53 PM
Federal Reserve creates new money “out of thin air” (in digital form) and uses it to buy Treasury bonds or other assets, which pumps liquidity into the financial system.” #Magic https://t.co/H8PZ6Xhdd8
Twitter
Disaster Is Inevitable When America's Stock Market Bubble Bursts: https://t.co/lOHhEmPsYJ by @TheBubbleBubble $QQQ $SPY
Likes
109
Twitter
⧉infominer
22-Sep-18 10:01 PM
My answer to How do banks and currency dealers actually exchange currency when it is electronic and not actually cash? What mechanism tracks it from one system to another and how do you even know that it was in the first system to begin with? https://t.co/lvMh8OIp9z
Twitter
When this gem first appeared in 1963, it took the form of a small paperback designed for mass distribution.
⧉infominer
23-Sep-18 05:52 AM
1/ Did you know, that the Vietnam war was a major contributor to the US going off the Gold Standard (aka the "Nixon shock"), which gave birth to the international fiat currencies system that we know today?
Likes
184
Twitter
⧉infominer
27-Sep-18 11:27 PM
2020 has been set as the date for the next financial crisis by the economist and experts alike that will break down everything as JPMorgan chase details the crashing we will be seeing. What role Bitcoin and cryptocurrencies will play here?
⧉infominer
28-Sep-18 12:23 AM
Economics 101 -- "How the Economic Machine Works." Created by Ray Dalio this simple but not simplistic and easy to follow 30 minute, animated video answers t...
⧉infominer
28-Sep-18 11:29 PM
“Negative interest rates are purely a construct of the artificiality of the monetary system. There is going to a major bond crash - the challenge is that this could be years if not decades away, or it could be tomorrow.”
— Caitlin Long
⧉infominer
05-Oct-18 07:31 AM
(Part 3 of 4: The Present, How Value is Tracked and Settled)
⧉infominer
05-Oct-18 03:58 PM
@BobMcElrath @_tessr There were public discussions after 2009 fin crisis, 2010 Greek crisis, 2011 MF Global collapse. Tri-party repo, securities lending and rehypo of collateral are necessary for the functioning of the financial system, per Bill Dudley (former NYFed). http...
Twitter
⧉infominer
26-Oct-18 07:05 AM
https://www.theinvestorspodcast.com/blog/americas-long-term-challenge-3-destruction-of-the-currency/
If you look at the history of the US dollar, it has lost 98.5% of its value since 1792. What’s incredible about this constant, steady destruction of the currency is how subtle it is.
⧉infominer
31-Oct-18 03:43 AM
“It is well enough that people of the nation do not understand our banking and monetary system, for if they did, I believe there would be…
⧉infominer
04-Nov-18 03:50 AM
The Triffin Dilemma refers to the double-edged sword of possessing a currency that serves as the world reserve currency. If a private cryptocurrency were to replace a given world reserve currency, this would eliminate the dilemma for that currency https://t.co/NgzPLcWbMM
Retweets
144
Likes
259
Twitter
⧉infominer
04-Nov-18 08:39 AM
(Part 3 of 4: The Present, How Value is Tracked and Settled)
⧉infominer
04-Nov-18 09:22 AM
A weekly financial podcast for professional finance, high net worth individuals, and other sophisticated investors
⧉infominer
05-Nov-18 07:15 AM
A history of the Rothschilds, a prominent family, originally from Germany, that established banking and finance houses in Europe.
⧉infominer
25-Nov-18 08:58 PM
“It is well enough that people of the nation do not understand our banking and monetary system, for if they did, I believe there would be…
⧉infominer
09-Dec-18 12:34 AM
No cryptocurrency is a true unit of account or a payment instrument, and we have seen this year that they are a poor store of value. Buyers of cryptocurrencies are buying into nothing more than a software algorithm.”
Agustín Carsten
https://t.co/Z39zAhf6i2
Twitter
⧉infominer
09-Dec-18 02:56 AM
Join thousands of others who receive this daily analysis of crypto markets & news in their inbox every morning - subscribe now. Banks aren’t going to go down quietly. Rather than completely ignore blockchain and crypto, the intelligent financial organizations are scrambling...
⧉infominer
22-Dec-18 09:51 PM
https://cryptoslate.com/szabo-traditional-finance-destroyed-its-tradition-merit-of-crypto-over-fiat/
According to crypto pioneer Nick Szabo, the traditional finance sector has destroyed its tradition and has implemented inappropriately complex policies.
⧉infominer
23-Dec-18 04:52 PM
Vijay Boyapati (Software Developer, Austrian Economist) joins me to discuss his 2010 article, “Why Credit Deflation Is More Likely Than Mass Inflation”. Find out where economics comment…
⧉infominer
31-Dec-18 10:30 PM
References and Resources for the animated short Money as Debt
⧉infominer
20-Jan-19 09:40 PM
Twitter went mad last week because somebody had transferred almost $150m in a single Bitcoin transaction. This tweet was typical: There was much comment about how expensive or difficult this would …
⧉infominer
22-Jan-19 11:16 PM
A framework for Bitcoin skeptics, part 1
Trusted third parties are security holes.
DoD: https://t.co/YPuFdT7rPF
Deutsche Bank: https://t.co/Bc2dEdr1i3
Marriot: https://t.co/7rmQO1rG1y
Twitter
⧉infominer
22-Jan-19 11:38 PM
Expanding on an observation from his last talk, Andreas asks why we talk so much about the cartels in drugs and oil, but rarely about one of the largest cart...
⧉infominer
08-Feb-19 06:35 AM
Swift is showing more swagger in its rivalry with Ripple thanks to progress it has made with a multifaceted payments-tracking technology called GPI.
⧉infominer
12-Feb-19 03:56 PM
⧉infominer
21-Feb-19 01:12 AM
10.10.2018
i have no idea just trying to connect the .......
#everyThingbubbLe excepT #Bitcoin
Retweets
129
Likes
417
Twitter
^^^ huge thread of oncoming collapse
⧉infominer
21-Feb-19 01:44 AM
Beat back the propaganda about the Federal Reserve with this free eBook.
This is the history of bull and bear markets.
Hang it on your wall. $SPX $DJIA
https://t.co/ABRW500mrh
Retweets
702
Likes
1457
Twitter
⧉infominer
12-May-19 06:48 PM
Since 1995, news.GoldSeek.com publishes the leading gold news commentaries, gold market updates and reports providing gold investors with the most updated gold and silver prices, news & precious metals information!
ON GITHUB
Share on
Twitter Facebook LinkedIn RedditSUPPORT THE CAUSE
Feel free to contact me, especially if you're interested in bitcoin related content or research!
| Bitcoin | DOGE |
|---|---|
| 1A1DZfw4VgpHCgnMjnmfDnMjddKf8xdYbd | DQKkzfJjqnXUD8Z7C3e84vKzvghPe9dXSa |


None of the following functions can be called with the arguments supplied.
- foo(T, Any, MutableList<`T>, MutableList<`T>)
where T cannot be inferred for
fun <`T> foo(t: T, a: Any, lt: MutableList<`T>, lr: MutableList<`T>): Int defined in p
- foo(Int, R, MutableList<`Int>, MutableList<`R>)
where R cannot be inferred; T = Int for
fun <`T, R> foo(t: T, r: R, lt: MutableList<`T>, lr: MutableList<`R>): Int defined in p


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Death of 1-year-old in Missouri investigated as suspicious
BERKELEY, Mo. (AP) - Authorities are investigating the death of a 1-year-old boy in suburban St. Louis as suspicious.
St. Louis County police said in a news release that officers from Berkeley responded to a report of an unresponsive child Wednesday. The child was taken to a hospital where he died.
Police in Berkeley asked St. Louis County police to investigate.
No details were released about why the death was considered suspicious, and the child’s name wasn’t immediately released.
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Please read our comment policy before commenting.


The software tool used to optimize the above image is called "PhotoScapeX". The previous size of the file was 145KB and now 36KB, displayed on the main page.


Scottish Fairy and Folk Tales, by George Douglas, [1901], at sacred-texts.com
THERE was a mouse in the hill, and a mouse in a farm.
"It were well," said the hill mouse, "to be in the farm, where one might get things."
Said the farm mouse, "Better is peace."


TRIPLE MEDICATED FOR DIAPER RASH- zinc oxide paste
Summers Laboratories Inc
Disclaimer: Most OTC drugs are not reviewed and approved by FDA, however they may be marketed if they comply with applicable regulations and policies. FDA has not evaluated whether this product complies.
ACTIVE INGREDIENT
ZINC OXIDE 12.8%
USES
- HELPS TREAT AND PREVENT DIAPER RASH
- PROTECTS CHAFED SKIN DUE TO DIAPER RASH AND HELPS PROTECT FROM WETNESS
WARNINGS
FOR EXTERNAL USE ONLY
Stop and ask a doctor if
- condition worsens or does not improve within 7 days
KEEP OUT OF REACH OF CHILDREN.
Directions
- Change wet and soiled diapers promptly
- Cleanse the diaper area and allow skin to dry
- Apply ointment liberally as often as necessary, with each diaper change, especially at bedtime or any time exposure to wet diapers may be prolonged
Inactive ingredients
white petrolatum, corn starch, anhydrous lanolin, stearyl alcohol, beeswax, bisabolol, cholesterol, water, glycerine, oat (avena sativa) kernel extract, polysorbate 80.


Hoisting is JavaScript's default behavior of moving declarations to the top.
In JavaScript, a variable can be declared after it has been used.
In other words; a variable can be used before it has been declared.
Example 1 gives the same result as Example 2:
To understand this, you have to understand the term "hoisting".
Hoisting is JavaScript's default behavior of moving all declarations to the top of the current scope (to the top of the current script or the current function).
JavaScript only hoists declarations, not initializations.
Example 1 does not give the same result as Example 2:
Does it make sense that y is undefined in the last example?
This is because only the declaration (var y), not the initialization (=7) is hoisted to the top.
Because of hoisting, y has been declared before it is used, but because initializations are not hoisted, the value of y is undefined.
Example 2 is the same as writing:
Hoisting is (to many developers) an unknown or overlooked behavior of JavaScript.
If a developer doesn't understand hoisting, programs may contain bugs (errors).
To avoid bugs, always declare all variables at the beginning of every scope.
Since this is how JavaScript interprets the code, it is always a good rule.
|
JavaScript in strict mode does not allow variables to be used if they are not declared. Study "use strict" in the next chapter. |


Clone
Clone creates multiple copies of a single input on the output. It is present under the Straight Pull category in the component palette since no transformations are performed on the incoming data.
Clone has a single input port and can transmit copy of the input data on one or more output ports. It does not have an unused port on it.
The Clone component can be easily distinguished in the component palette.
An enlarged version of the same is depicted when dragged on the canvas.
For further reference click on the links below:


@(assetsHost: String, assetsBuild: String, studyName: String, studySupportEmail: String, studyId: String)


Client-side CoffeeCup (crème)
Doing everything on the client. Lots of flexibility but a fatty download.


Free Personalization out of the Box
With easyrec you can personalize your applications within minutes - just for
free.
easyrec is a web application that provides recommendation services using
standardized web technologies, which can be integrated into web enabled applications.
easyrec is...
-
easy to use - personalize your application within minutes
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easy to integrate - due to plug-ins and webservice API
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easy to scale - due to distributed architecture
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easy to maintain - with the available administration tool
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for free - easyrec is going Open Source soon!


University Institute of Engineering & Technology
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map() from Arduino library is expensive in terms of flash and time
Submitted by cybergibbons on Thu, 27/03/2014 - 08:57
I've been playing with an RFu-328 and a thermistor as opposed to a DS18B20. This is because thermistors are pennies compare to pounds, and they give almost instant readings instead of having to wake, request, sleep, read a with the DS18B20.
The example code I was using had map() to change the thermistor readings into something more useful. I noticed this seemed to be taking a lot longer than expected, so I looked into it.
The short of it is that map() is really quite inefficient, and it's nearly always possible to use a simpler construct to map values.
I wrote a blog post about this, including how to make the map() used in emonGLCD more efficient (not that it matters, as it is mains powered):
map() from Arduino library is expensive in terms of flash and time
Submitted by cybergibbons on Thu, 27/03/2014 - 08:57I've been playing with an RFu-328 and a thermistor as opposed to a DS18B20. This is because thermistors are pennies compare to pounds, and they give almost instant readings instead of having to wake, request, sleep, read a with the DS18B20.
The example code I was using had map() to change the thermistor readings into something more useful. I noticed this seemed to be taking a lot longer than expected, so I looked into it.
The short of it is that map() is really quite inefficient, and it's nearly always possible to use a simpler construct to map values.
I wrote a blog post about this, including how to make the map() used in emonGLCD more efficient (not that it matters, as it is mains powered):
http://cybergibbons.com/arduino/arduino-misconceptions-x-map-is-a-low-ef...


You can import an exported cluster configuration to create a new cluster or import data into a region.
-
Import a cluster configuration.
-
Import user data from a file to a region.
import cluster-configuration
Imports a previously exported cluster configuration from a zip file. This command is useful when spinning up a new cluster.
- In a given cluster, only one locator needs to perform the import. That locator shares the imported configuration with all other connected locators in the distributed system.
- Locators share the imported configuration with data members (servers) when the servers start, or if the servers have been recently started, have no regions defined in them, and have been given no other configuration changes since they started.
To import a cluster configuration, start one or more locators and then run the gfsh
import cluster-configuration
command.
Availability: Online. You must be connected in gfsh
to a locator to use this command.
Syntax:
import cluster-configuration --zip-file-name=value
Import Cluster-Configuration Parameters:
| Name | Description |
|---|---|
| --zip-file-name | Required. Name of the zip file containing the cluster configuration artifacts to be imported. |
Example Commands:
gfsh>import cluster-configuration --zip-file-name=/home/username/myClusterConfig.zip
Sample Output:
gfsh>import cluster-configuration --zip-file-name=/home/username/myClusterConfig.zip
Cluster configuration successfully imported
import data
Import user data from a file or files to a region.
Availability: Online. You must be connected in gfsh
to a JMX Manager member to use this command.
Syntax:
If the data was exported sequentially to a single file, use the serial form of the import
command to import the data:
import data --region=value --file=value --member=value [--invoke-callbacks=value]
In this scenario, data from replicated and partitioned regions is imported sequentially from a single file on the specified member.
See export data for an explanation of the difference between serial and parallel data exports.
If the data was exported from a partitioned region in parallel format, use the --parallel
option to import the data:
import data --parallel --region=value --member=value --dir=value
[--invoke-callbacks=value]
In this scenario, partitioned region data is imported simultaneously on all hosting nodes from directories local to those respective nodes.
Parallel import applies only to partitioned regions exported in parallel mode.
The
--file
and--dir
options are mutually exclusive;--file
can be used only for serial import,--dir
can be used for both serial and parallel imports.
Import Data Parameters:
| Name | Description | Default Value |
|---|---|---|
| --region | Required. Region into which data will be imported. | |
| ‑‑member | Required. Name/ID of a member that hosts the region. In a serial import, all data is imported from the specified file on the host where the member is running. In a parallel import, data from a partitioned region partially hosted on this member is imported for each partition from files on the nodes that host those partitions. | |
| --file | File from which the imported data will be read. The file must have an extension of .gfd and must be on the file system of the member (or accessible to that member via NFS) that is being targeted for the import. Cannot be specified at the same time as --dir, cannot be used with ‑‑parallel. |
|
| --dir | Directory from which the data is to be imported. Required if --parallel is true. Cannot be specified at the same time as --file. If a given node has no data file in the specified directory, the import operation is silently skipped for that node. | |
| ‑‑invoke‑callbacks | Boolean value that, when true, invokes callbacks during the data import. | false |
Example Commands:
import data --region=region2 --file=/mnt5/region2_20121001.gfd --member=server1


Logboard
public class Logboard
Undocumented
-
Undocumented
Declaration
Swift
public static let dateFormatter: DateFormatter
-
Undocumented
See moreDeclaration
Swift
public enum Level : Int, CustomStringConvertible
-
Undocumented
Declaration
Swift
public static func with(_ identifier: String) -> Logboard
-
Undocumented
Declaration
Swift
public let identifier: String
-
Undocumented
Declaration
Swift
public var level: Logboard.Level
-
Undocumented
Declaration
Swift
public var appender: LogboardAppender
-
Undocumented
Declaration
Swift
public init(_ identifier: String)
-
Undocumented
Declaration
Swift
public func isEnabledFor(level: Logboard.Level) -> Bool
-
Undocumented
Declaration
Swift
public func trace(_ message: Any..., file: StaticString = #file, function: StaticString = #function, line: Int = #line)
-
Undocumented
Declaration
Swift
public func trace(format: String, arguments: CVarArg, file: StaticString = #file, function: StaticString = #function, line: Int = #line)
-
Undocumented
Declaration
Swift
public func debug(_ message: Any..., file: StaticString = #file, function: StaticString = #function, line: Int = #line)
-
Undocumented
Declaration
Swift
public func debug(format: String, arguments: CVarArg, file: StaticString = #file, function: StaticString = #function, line: Int = #line)
-
Undocumented
Declaration
Swift
public func info(_ message: Any..., file: StaticString = #file, function: StaticString = #function, line: Int = #line)
-
Undocumented
Declaration
Swift
public func info(format: String, arguments: CVarArg, file: StaticString = #file, function: StaticString = #function, line: Int = #line)
-
Undocumented
Declaration
Swift
public func warn(_ message: Any..., file: StaticString = #file, function: StaticString = #function, line: Int = #line)
-
Undocumented
Declaration
Swift
public func warn(format: String, arguments: CVarArg, file: StaticString = #file, function: StaticString = #function, line: Int = #line)
-
Undocumented
Declaration
Swift
public func error(_ message: Any..., file: StaticString = #file, function: StaticString = #function, line: Int = #line)
-
Undocumented
Declaration
Swift
public func error(format: String, arguments: CVarArg, file: StaticString = #file, function: StaticString = #function, line: Int = #line)


Raising a Seed Round: A Step-by-Step Guide
Your first round of financing is a mixed bag. In some regards, it can be the easiest money you will ever get. In other ways, it is the most challenging. At this stage angel investors still see opportunity in getting in early, and traditional venture capitalists still have some interest if your company has large visions. At this stage you are mostly pitching vision. What your company will eventually become. You may have some initial traction, but nothing that can guarantee future earnings.
In order to help others learn from our mistakes, we wanted to create a helpful guide for raising your first round of financing.
Step 1. Identify Every Investor in the World
Fund raising is similar to classic enterprise sales. You need to generate your list of leads. Sites like AngelList and even wikipedia can help you construct this list. Start by making the largest list of angels and venture capital firms that you can make. Shoot for around 200 leads.
Step 2. (Dis)Qualify Investors
Every investor has an investment thesis. It is their vision of where the world is going. Their thesis will explain what types of companies they invest in, at what stage they invest, and how much they are willing to invest. These theses can be found on AngelList or on the investor's website.
Use each investor's thesis to identify why or why not they should invest in your company. Do they invest in b2b or consumer businesses? Do they invest small or large amounts? Do they want to lead or follow on? Do they invest in your vertical and/or sector?
If they are not from an investment background, but are entrepreneurs themselves (Most Angels and some VC like Andreessen Horowitz and True Ventures), have they built companies similar to the one your are building? If they have already done it once, the advice they can give you is invaluable.
As you are qualify and disqualify investors take notes as to why or why not they would be a good investor. The reasons why a potential investor would invest in you is critical to the success of your fund raising. When you meet with them you can even explain why your company fits into their portfolio by citing their thesis.
Step 3. Ask For Intros
Although investors will take meetings with almost anyone (It helps with their deal flow), investors love warm intros. Identify how you are connected to investors and ask your connections for warm intros. Explain to your connection the reasons why you want to talk to them. This should be easy to do since you have already done your homework and qualified them as a potential investor.
If you are going through an incubator such as AngelPad, YC, or TechStars, leverage this network to make warm intros to the people on your list. If you have multiple people who could make an introduction for you, ask the person who has already made them money. Investors love keeping in contact with entrepreneurs who've made them returns and in order to keep relationships with these entrepreneurs healthy, they will love talking with you.
Step 4. Follow Up & Background Check
After meeting the investors if they have any questions in the meeting you can't address, follow up with an email answering their questions. If they decide they want to invest in you call around to some of their portfolio companies and do background checks on the investors. Try to do this for both successful and unsuccessful companies in their portfolio. Other entrepreneurs are a great way to vet whether investors are helpful or not.
Things to Keep in Mind
Shorten your fund raising cycle. Once you begin the process, your timer has begun. Startups have to be fast at doing everything and this includes fund raising. Get all of your meetings back to back in the shortest time possible.  Don't let this happen.
Use feedback effectively. If an investor asks you a question, answer it. When you are done with the meeting, add a slide to your investor deck that answers the question they asked. Should this slide go into the presentation? If it makes sense, yes. If not, add it to the appendix. If you continue getting asked this question in other meetings, then maybe it should be put into the pitch deck.
This is not the only way to finance your venture. If you have a large network there are other methods for fund raising, but, this is what works for 95% of the people seeking financing for the first time.


I am a developer, very passionate about making clean interfaces and writing clean code. I am presently going through the WIN Program for a 6 months period. 3months in class and and 3 months on the job site. I am really excited about this opportunity and really want to make the most of it.


Gems can be such an amazing time saver and can vastly improving your apps functionality, security, maintainability, and presentability. It can be very easy for a new developer to load their app up with every gem under the sun.
Letting your Gemfile get out of hand can quickly bloat your project with a lot of unnecessary code and some times it is better to build the methods on your own so that you can gain a deeper knowledge set.
With all this being said I’ve created a list of Gems that I’ve either used and loved or plan to use on future projects.
Authentication
- Devise - This is a very robust authentication gem with excellent documentation. When I used this gem I found the helpers like
user_signed_in?
and `current_user’ to make this much simpler but this is just the tip of the iceberg. - CanCanCan - All of your permissions are defined in the
Ability
class which can then be accessed by usingcan?
andcannot?
. This gem helps to better organize permissions and make your code more readable.
User Interfaces
- Kaminari - When the number of items in your database starts to get a little unwieldy and you want the user or yourself to have more control over the pagination this is your solution. This full featured paginator has everything you need to make database display simple and effective.
- Chartkick - An awesomely simple tool to make JavaScript charts out of a single line of Ruby. All you have to do is pick what kind of chart you’d like and what data you’d like to be presented and viola, it’s just that easy.
- CarrierWave - Need to allow the user to upload certain files but want to limit the types of files they can upload? Want to allow the user to upload files from remote locations? CarrierWave is a wonderfully straightforward solution.
- Ransack - Regardless of whether you just need a simple search form or a more advanced form Ransack is going to be a great option. Documentation for this gem is very clearly written for how robust it can be.
Helping the Developer
- Annotate - This gem allows you to add a comment showing the current schema to your models, tests, fixtures, factories, and/or routes. Very simple but can make a world of difference in terms of maintainability.
- RuboCop - This is a great code analyzer which helps the programmer stay within the guidlines in the Ruby Style Guide. It’s always nice to have your work checked for you.
- Figaro - A gem focused on keeping sesitive configuration information, like tokens, out of Git. As a big added bonus it is also Heroku-friendly.
SEO
- MetaTags - This plugin allows you to streamline the SEO process so you can get back to cranking out incredible content.


public class Sasl extends Object
This class defines the policy of how to locate, load, and instantiate SASL clients and servers.
For example, an application or library gets a SASL client by doing something like:
It can then proceed to use the instance to create an authentication connection.SaslClient sc = Sasl.createSaslClient(mechanisms, authorizationId, protocol, serverName, props, callbackHandler);
Similarly, a server gets a SASL server by using code that looks as follows:
SaslServer ss = Sasl.createSaslServer(mechanism, protocol, serverName, props, callbackHandler);
| Modifier and Type | Field and Description |
|---|---|
static String |
BOUND_SERVER_NAME
The name of a property that specifies the bound server name for
an unbound server.
|
static String |
CREDENTIALS
The name of a property that specifies the credentials to use.
|
static String |
MAX_BUFFER
The name of a property that specifies the maximum size of the receive
buffer in bytes of
SaslClient /SaslServer . |
static String |
POLICY_FORWARD_SECRECY
The name of a property that specifies whether mechanisms that implement
forward secrecy between sessions are required.
|
static String |
POLICY_NOACTIVE
The name of a property that specifies whether
mechanisms susceptible to active (non-dictionary) attacks
are not permitted.
|
static String |
POLICY_NOANONYMOUS
The name of a property that specifies whether mechanisms that accept
anonymous login are not permitted.
|
static String |
POLICY_NODICTIONARY
The name of a property that specifies whether
mechanisms susceptible to passive dictionary attacks are not permitted.
|
static String |
POLICY_NOPLAINTEXT
The name of a property that specifies
whether mechanisms susceptible to simple plain passive attacks (e.g.,
"PLAIN") are not permitted.
|
static String |
POLICY_PASS_CREDENTIALS
The name of a property that specifies whether
mechanisms that pass client credentials are required.
|
static String |
QOP
The name of a property that specifies the quality-of-protection to use.
|
static String |
RAW_SEND_SIZE
The name of a property that specifies the maximum size of the raw send
buffer in bytes of
SaslClient /SaslServer . |
static String |
REUSE
The name of a property that specifies whether to reuse previously
authenticated session information.
|
static String |
SERVER_AUTH
The name of a property that specifies whether the
server must authenticate to the client.
|
static String |
STRENGTH
The name of a property that specifies the cipher strength to use.
|
| Modifier and Type | Method and Description |
|---|---|
static SaslClient |
createSaslClient(String[] mechanisms,
String authorizationId,
String protocol,
String serverName,
Map<String,?> props,
CallbackHandler cbh)
Creates a
SaslClient using the parameters supplied. |
static SaslServer |
createSaslServer(String mechanism,
String protocol,
String serverName,
Map<String,?> props,
CallbackHandler cbh)
Creates a
SaslServer for the specified mechanism. |
static Enumeration<SaslClientFactory> |
getSaslClientFactories()
Gets an enumeration of known factories for producing
SaslClient . |
static Enumeration<SaslServerFactory> |
getSaslServerFactories()
Gets an enumeration of known factories for producing
SaslServer . |
public static final String QOP
"auth"
- authentication only"auth-int"
- authentication plus integrity protection"auth-conf"
- authentication plus integrity and confidentiality
protection"auth"
.
The value of this constant is "javax.security.sasl.qop"
.public static final String STRENGTH
"low"
"medium"
"high"
"high,medium,low"
.
The value of this constant is "javax.security.sasl.strength"
.public static final String SERVER_AUTH
"true"
if the server must
authenticate the to client; "false"
otherwise.
The default is "false"
.
"javax.security.sasl.server.authentication"
.public static final String BOUND_SERVER_NAME
serverName
argument in createSaslServer(java.lang.String, java.lang.String, java.lang.String, java.util.Map<java.lang.String, ?>, javax.security.auth.callback.CallbackHandler)
as null.
The property contains the bound host name after the authentication
exchange has completed. It is only available on the server side.
"javax.security.sasl.bound.server.name"
.public static final String MAX_BUFFER
SaslClient
/SaslServer
.
The property contains the string representation of an integer.
"javax.security.sasl.maxbuffer"
.public static final String RAW_SEND_SIZE
SaslClient
/SaslServer
.
The property contains the string representation of an integer.
The value of this property is negotiated between the client and server
during the authentication exchange.
"javax.security.sasl.rawsendsize"
.public static final String REUSE
public static final String POLICY_NOPLAINTEXT
"true"
if such mechanisms are not permitted;
"false"
if such mechanisms are permitted.
The default is "false"
.
"javax.security.sasl.policy.noplaintext"
.public static final String POLICY_NOACTIVE
"true"
if mechanisms susceptible to active attacks
are not permitted; "false"
if such mechanisms are permitted.
The default is "false"
.
"javax.security.sasl.policy.noactive"
.public static final String POLICY_NODICTIONARY
"true"
if mechanisms susceptible to dictionary attacks are not permitted;
"false"
if such mechanisms are permitted.
The default is "false"
.
"javax.security.sasl.policy.nodictionary"
.public static final String POLICY_NOANONYMOUS
"true"
if mechanisms that accept anonymous login are not permitted;
"false"
if such mechanisms are permitted. The default is "false"
.
"javax.security.sasl.policy.noanonymous"
.public static final String POLICY_FORWARD_SECRECY
"true"
if mechanisms that implement forward secrecy
between sessions are required; "false"
if such mechanisms
are not required. The default is "false"
.
"javax.security.sasl.policy.forward"
.public static final String POLICY_PASS_CREDENTIALS
"true"
if mechanisms that pass
client credentials are required; "false"
if such mechanisms are not required. The default is "false"
.
"javax.security.sasl.policy.credentials"
.public static final String CREDENTIALS
"javax.security.sasl.credentials"
.public static SaslClient createSaslClient(String[] mechanisms, String authorizationId, String protocol, String serverName, Map<String,?> props, CallbackHandler cbh) throws SaslException
SaslClient
using the parameters supplied.
This method uses the
JCA Security Provider Framework, described in the
"Java Cryptography Architecture API Specification & Reference", for
locating and selecting a SaslClient
implementation.
First, it
obtains an ordered list of SaslClientFactory
instances from
the registered security providers for the "SaslClientFactory" service
and the specified SASL mechanism(s). It then invokes
createSaslClient()
on each factory instance on the list
until one produces a non-null SaslClient
instance. It returns
the non-null SaslClient
instance, or null if the search fails
to produce a non-null SaslClient
instance.
A security provider for SaslClientFactory registers with the
JCA Security Provider Framework keys of the form
SaslClientFactory.
mechanism_name
and values that are class names of implementations of
javax.security.sasl.SaslClientFactory
.
For example, a provider that contains a factory class,
com.wiz.sasl.digest.ClientFactory
, that supports the
"DIGEST-MD5" mechanism would register the following entry with the JCA:
SaslClientFactory.DIGEST-MD5 com.wiz.sasl.digest.ClientFactory
See the "Java Cryptography Architecture API Specification & Reference" for information about how to install and configure security service providers.
mechanisms
- The non-null list of mechanism names to try. Each is the
IANA-registered name of a SASL mechanism. (e.g. "GSSAPI", "CRAM-MD5").authorizationId
- The possibly null protocol-dependent
identification to be used for authorization.
If null or empty, the server derives an authorization
ID from the client's authentication credentials.
When the SASL authentication completes successfully,
the specified entity is granted access.protocol
- The non-null string name of the protocol for which
the authentication is being performed (e.g., "ldap").serverName
- The non-null fully-qualified host name of the server
to authenticate to.props
- The possibly null set of properties used to
select the SASL mechanism and to configure the authentication
exchange of the selected mechanism.
For example, if props
contains the
Sasl.POLICY_NOPLAINTEXT
property with the value
"true"
, then the selected
SASL mechanism must not be susceptible to simple plain passive attacks.
In addition to the standard properties declared in this class,
other, possibly mechanism-specific, properties can be included.
Properties not relevant to the selected mechanism are ignored,
including any map entries with non-String keys.cbh
- The possibly null callback handler to used by the SASL
mechanisms to get further information from the application/library
to complete the authentication. For example, a SASL mechanism might
require the authentication ID, password and realm from the caller.
The authentication ID is requested by using a NameCallback
.
The password is requested by using a PasswordCallback
.
The realm is requested by using a RealmChoiceCallback
if there is a list
of realms to choose from, and by using a RealmCallback
if
the realm must be entered.SaslClient
created using the parameters
supplied. If null, cannot find a SaslClientFactory
that will produce one.SaslException
- If cannot create a SaslClient
because
of an error.public static SaslServer createSaslServer(String mechanism, String protocol, String serverName, Map<String,?> props, CallbackHandler cbh) throws SaslException
SaslServer
for the specified mechanism.
This method uses the
JCA Security Provider Framework,
described in the
"Java Cryptography Architecture API Specification & Reference", for
locating and selecting a SaslServer
implementation.
First, it
obtains an ordered list of SaslServerFactory
instances from
the registered security providers for the "SaslServerFactory" service
and the specified mechanism. It then invokes
createSaslServer()
on each factory instance on the list
until one produces a non-null SaslServer
instance. It returns
the non-null SaslServer
instance, or null if the search fails
to produce a non-null SaslServer
instance.
A security provider for SaslServerFactory registers with the
JCA Security Provider Framework keys of the form
SaslServerFactory.
mechanism_name
and values that are class names of implementations of
javax.security.sasl.SaslServerFactory
.
For example, a provider that contains a factory class,
com.wiz.sasl.digest.ServerFactory
, that supports the
"DIGEST-MD5" mechanism would register the following entry with the JCA:
SaslServerFactory.DIGEST-MD5 com.wiz.sasl.digest.ServerFactory
See the "Java Cryptography Architecture API Specification & Reference" for information about how to install and configure security service providers.
mechanism
- The non-null mechanism name. It must be an
IANA-registered name of a SASL mechanism. (e.g. "GSSAPI", "CRAM-MD5").protocol
- The non-null string name of the protocol for which
the authentication is being performed (e.g., "ldap").serverName
- The fully qualified host name of the server, or null
if the server is not bound to any specific host name. If the mechanism
does not allow an unbound server, a SaslException
will
be thrown.props
- The possibly null set of properties used to
select the SASL mechanism and to configure the authentication
exchange of the selected mechanism.
For example, if props
contains the
Sasl.POLICY_NOPLAINTEXT
property with the value
"true"
, then the selected
SASL mechanism must not be susceptible to simple plain passive attacks.
In addition to the standard properties declared in this class,
other, possibly mechanism-specific, properties can be included.
Properties not relevant to the selected mechanism are ignored,
including any map entries with non-String keys.cbh
- The possibly null callback handler to used by the SASL
mechanisms to get further information from the application/library
to complete the authentication. For example, a SASL mechanism might
require the authentication ID, password and realm from the caller.
The authentication ID is requested by using a NameCallback
.
The password is requested by using a PasswordCallback
.
The realm is requested by using a RealmChoiceCallback
if there is a list
of realms to choose from, and by using a RealmCallback
if
the realm must be entered.SaslServer
created using the parameters
supplied. If null, cannot find a SaslServerFactory
that will produce one.SaslException
- If cannot create a SaslServer
because
of an error.public static Enumeration<SaslClientFactory> getSaslClientFactories()
SaslClient
.
This method uses the same algorithm for locating factories as
createSaslClient()
.SaslClient
.createSaslClient(java.lang.String[], java.lang.String, java.lang.String, java.lang.String, java.util.Map<java.lang.String, ?>, javax.security.auth.callback.CallbackHandler)
public static Enumeration<SaslServerFactory> getSaslServerFactories()
SaslServer
.
This method uses the same algorithm for locating factories as
createSaslServer()
.SaslServer
.createSaslServer(java.lang.String, java.lang.String, java.lang.String, java.util.Map<java.lang.String, ?>, javax.security.auth.callback.CallbackHandler)
Submit a bug or feature
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
Copyright © 1993, 2015, Oracle and/or its affiliates. All rights reserved.


Cliommit tracks your total carbon footprint including travel and purchases, it then calculates the costs to offset your lifestyle and automatically debits your account. All proceeds are then invested into SDG companies and the return is awarded to those who lead low carbon lives!


If you are a Principal Investigator or a Facility Coordinator, you are going to certify also the scientific production of your group (research line or facility), in addition to your personal profile.
To switch between the personal and the group profile, just click on the arrow next to your profile's name and select the desired profile, as shown in the image.
In the Suggested section, you will find automatically the publications already added by your team members to their personal profiles: you can verify them directly, adding them to the scientific production of the group.
You can also check and modify your team members.


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Before we put anything into the case and start building in it, we want to setup the computer outside of the case to
make sure all the parts works and arnt bad parts. here is a good video to show you how to test it outside of the case.
Building the pc would be really really hard to explain on this website and I cant make a video so here are some
really good videos on how to build a PC and tips to building.Two of the videos are AMD builds and the last one is an intel build.
Pretty simple right? PC build is a verry simple procces and it dosnt take much knoledge to assemble a PC.


Fire Engineering and Git
As a geek, Git is a fantastic program. Almost everything I write is in plain text, outside of the office (where I’m forced to use Microsoft Word). I wrote my doctoral thesis within LaTeX and Git allowed me to keep a fantastic record of the changes to my thesis as I went through my work, as well as providing a backup. Outside of work, I write occasionally for Micro Mart and of course I write these blog posts and others. I even journal and write a diary in plain text.
However, when I’m in the office, I’m expected to use Word, which is fine (but I hate Word with a passion - it’s a pain to do some of the advanced functions without taking my hands away from the keyboard and that slows me down). Whilst we use Word for writing our reports, we make use of the free Fire Dynamics Simulator (FDS) for modelling fires. And therein lies the beauty of FDS and Git.
Git
Git works well with plain text files, such as coding. That’s what it’s designed for. Browse Github and you’ll find various computer programs and project in a range of different languages, all of them written within a coding editor of some kind. Because it works with plain text files, it can be used to track changes within any plain text file and that’s where FDS comes in.
FDS stores it’s data in a single plain text file. You create the geometry of the fire compartment using obstructions and specifying the co-ordinates of the actual walls etc. This is obviously quite time consuming and tiresome (which is why there are third party solutions for building models, such as Pyrosim). Even though Pyrosim runs the models and builds them - at the heart of it all is that single FDS text file that sets out the model parameters - Pyrosim is just a glossy finish to it really.
So I’ve taken to using Git to store and track all the changes to my models. This works really well as you can see in the image below. Bitbucket even highlights some of the sections fairly well, which is quite impressive considering the syntax probably isn’t in the database! (I’ve blanked out the project name as it identifies the project and I don’t want that public).
I’ve taken to using Bitbucket, which lets me create a private repository where I can store my FDS files. Tracking is important from a quality management role - it’s important to show the external auditor that the data is being checked and that the models are being run properly. From a research point of view, the tracking allows all the changes to the model to be understood by a third party that may be reviewing or trying to replicate the results. Similar results can be gathered using Github. In fact, I host a Github repository for helpful FDS files and the like here. You’ll find a library file there (basically an FDS file that Pyrosim creates with a number of properties/materials/constants in, but no obstructions), with a number of properties specified, taken from literature.
The benefit of hosting this on Github is that the full history of the changes to the library can be viewed. From a research point of view, this is a fantastic help and means that all the changes can be checked off.
Another perk of storing these files in Git is that other users can then decide to either fork the data and use it themselves and make changes and they can also then merge the data with your own to help create an organised database of information.
Conclusion
Whilst a slightly technical method of storing FDS files, the perks more than makes up for the little effort required to learn Git. However, even this doesn’t have to hard - Github offer an easy to use Git client and Sparkleshare is a setup and forget solution. However, it’s worth learning the extra benefits of Git as it will allow you make the changes you need and add additional information (such as informative commit messages).
I should point out, that this applies to the FDS files and not the Pyrosim files - as these are a binary file, you don’t get the same benefits to storing these in Git as you do with the FDS files.


Microsoft Visual Basic Express Starter Kit
Starter Kit: My Movie Collection
Contents:
Introduction
Download the Updated Web Plus
Edition
Getting Started
How My Movie Collection Works
My Movie Collection Starter Kit In-Depth
Introduction
The My Movie Collection starter kit is a sample application designed to help you track your collection of movies. With this kit, you can organize movies in your collection, rate them, and look up information about them. Plus, you can change the application anyway you want and see the source code.
Download the Updated Web Plus Edition
Want to connect your movie collection to the Web and download information about your movies? The Web Plus edition of the My Movie collection starter kit does just that: it tracks your collection and searches for movies using an online Web service. The Web Plus edition also contains updates to the starter kit that aren't in the version shipped with Visual Basic Express Edition, so you will want to download it even if you don't want to use the Web features.
You can download the Web Plus edition for free from here.
Getting Started
The first step to getting your movie collection application up and running is loading the starter kit project by choosing the My Movie Collection Starter Kit template in the New Project dialog box.
1) Starting the My Movie Collection Application
To see the application in action, you need to run it.
To run the application
- Press F5 to run the application.
The form for the application is displayed. This is the form where you’ll enter information about your movies, organize them, and search through your collection.
2) Adding Movies to your Collection
Let's add a movie from your collection.
To add a movie to your collection
- On the form, click Add Title.
A new entry, called a record, opens in the list above the Add Title button.
- In the dvd details boxes to the right, add the title of a favorite movie and other information, such as director or movie rating.
The database file that is part of your project is updated with the information automatically anytime you add, delete, or modify data.
At any time, you can select a movie from the grid and view its details.
3) Updating Information about your Collection
Updating a record is just as easy as entering one.
To update a record in your movie collection
- In the list, click the record you would like to update.
- The data from this record is displayed in the boxes to the right.
- Choose the data that you would like to update and make your change. Your new information is saved as soon as you move from a box.
4) Searching Online for Information about a Movie
If you have the Web Plus edition of the My Movie Collection starter kit, you can take advantage of the rich movie collection that is provided by Amazon.com Web service. The My Movie Collection starter kit application is already connected, and you can use this connection to download information about your favorite films. Don't forget: You need to be connected to the Internet for this to work, and you need the Web Plus edition, which can be downloaded for free here.
To get online information about a movie
- Connect to the Internet, if you are currently offline.
- On the form, click the Search Online button.
- In the first box, type a keyword or keywords related to the film, and then click the Search button. The keywords can be words from the title, actor names, or any other words having to do with the film. The first ten films that match are added to the results list; if the film that you were looking for is not included in the first ten, you can enter additional keywords to narrow the results.
- If there's a match with the film you were looking for, select it and click Add To Collection.
The movie is added to your collection.
5) Assigning a Rating to a Movie
Now you can be a movie critic. Movies that are added via the Web don't have ratings or comments, but you can add your own.
To assign a rating to a movie
- Using the mouse, click the number of stars to assign a rating (1 through 5). The stars turn yellow when selected. Your rating is automatically saved.
To add a comment for a movie
- Select the Comments field and enter your comments. The comments are automatically saved
6) Customizing the Application
Let's see how easy it is to customize the look and feel of the application. You can customize the text of labels and forms, and use your own images and icons for your application. Before you can do this, however, you need to stop the application from running.
To stop the application from running
- Switch to the Visual Basic Express Edition window.
- On the Debug menu, click Stop Debugging.
You’re in design mode. This mode is where you can make code and design changes.
Customizations
The My Movie Collection application consists of several forms. MainForm.vb is the starting point for the application. There are also two custom controls:
- ListDetails.vb – This control is where you view details about your collection. The information comes from the My Movie Collection database.
- SearchOnline.vb – This control is connected to the Amazon.com Web service, and is what you use to search online.
You can customize the text or images of the form or any of the controls by setting properties in the Properties window. Or, you can update properties by editing the code associated with the forms.
The following examples show a few of the ways you might want to customize the application.
To change the text displayed in the Title Bar
- In Solution Explorer, right-click MainForm.vb and choose View Designer.
- In the Properties window, make sure that MainForm is selected in the dropdown list, then locate and change the value of Text property. For example, change the text from "My Movie Collection" to "[Your Name] Movie Collection."
The Text property of the form is changed once you press ENTER. Notice that the Title Bar of the form reflects your new text.
You will probably also want to change the text displayed on the form itself to match, since it still reads "my movie collection".
To change the text displayed on the form
- In Solution Explorer, right-click MainForm.vb and choose View Designer.
- Select the Label control that contains the text "my movie collection".
- In the Properties window, locate and change the value of Text property. For example, change the text from "My Movie Collection" to "[Your Name] Movie Collection."
The Text property of the label is changed once you press ENTER.
You can change the properties of any of the custom controls that appear on the form.
Images for the application are managed in the Resources tab of the Project Designer.
To add a background image
- In Solution Explorer, double-click My Project. The Project Designer opens. This designer makes it easy to modify or add content such as resource files.
- On the left side, click the Resources tab.
- In the Categories list, select Images.
- Add your favorite images to the designer. Click the Add button and then click Existing File. Locate to the image you want to add. Or drag and drop an image file from Windows Explorer (for example, from My Pictures) to the designer.
-
In Solution Explorer, right-click ListDetails.vb and choose View Designer.
The ListDetails form will appear in the Form designer.
- Select the DVDDetailsPanel control (the dark gray box on the right side of the form).
In the Properties window, locate the BackgroundImage property and click the ellipsis button to the right of the property.
The Select Resource dialog box will open.
-
Select the image that you just added, and then click OK.
The new background image will appear in the designer. You can change the image to anything in the Resources folder, including the image you added.
Do you ever have movie titles too long to fit in your labels? This will fix it.
To change display behavior of ListDetails
- In Solution Explorer, right-click ListDetails.vb and choose View Designer.
- Click the Label2 control ("[Title]") , and in the Properties window set AutoSize property = False; set AutoEllipsis property = True.
To test your application
- Press F5 to rebuild the application. You can now see your changes.
Move your mouse over the title of the movie in your collection to show its ToolTip and ellipsis.
Want to add a new field to keep track of the actors in your movies? Here's how.
To add a field to ListDetails
- In Solution Explorer, right-click ListDetails.vb and choose View Designer.
- From the Toolbox window, drag a TextBox control onto the form beneath the Description field. Resize and rearrange the controls as necessary.
- With the TextBox control selected, choose the (DataBindings) property in the Properties window and expand it.
- Select the (Advanced) property and click the Ellipsis button to open the Formatting and Advanced Binding dialog box.
- From the Binding dropdown list, choose DVDsBindingSource - Actor, and then click Ok.
- From the Toolbox, drag a Label control onto the form and place it next to the new TextBox control.
- In the Properties window, change the Text property to "Actors".
When you run the application again you should see the Actors field. Enter the names of the actors for the movie.
Do you have movies in more than one format, for example DVD and VHS? Add a field to the database to track the media type.
To add a field to the database
- In Solution Explorer, right-click DVDCollectionDatabase.mdf and choose Open. The Database Explorer window will open.
- In the Database Explorer, expand the Tables node and select DVDs, and then right-click and choose Open Table Definition.
- In the Table designer, scroll to the bottom of the list and in the Column Name column type "Media".
- In the Data Type column, select nvarchar(MAX) from the dropdown list.
- On the File menu, choose Save DVDs to save your changes.
You can now add a Media field to the ListDetails view as you did with the Actors field in the previous example.
How My Movie Collection Works
This has been a brief introduction to the My Movie collection starter kit. You can use the application some more, and get more practice in customizing the look and feel. You might try rearranging the layout of the controls or dramatically altering the look and feel. If you are comfortable with Visual Basic code, dissect the functionality of the application by examining the source code. Finally, add features to the application to organize books and music, or write your own application based on this one.
My Movie Collection Files and Folders
The My Movie Collection starter kit consists of the following files and folders.
| MainForm.vb | Main form; serves as container for controls. |
| ListDetails.vb | Custom user control; serves as a viewer and editor for your movie collection. |
| SearchOnline.vb | Custom user control; serves as a search tool for online web services. |
| DVDCollectionDatabase.mdf | Database for movie collection. Note: When adding a database to your project, it is important to understand where the database is located. For more information, look for the help topic "How To: Manage Local Data Files in Your Project". |
| DVDCollectionDataSet.xsd | Dataset and data layer objects; helps to do database operations such as loading, saving, and validating data. |
| Resources folder | Folder containing images, such as bitmaps. |
| Documentation folder | Folder containing documentation and Help for the starter kit. Right-click Getting Started Tutorial.htm and then click View in Browser to view the documentation. |
| Controls folder | Custom controls used by the collection. |
| Web References folder | (Web Plus edition only) Folder containing Web Service connection. |
| Project folder | Folder containing Visual Basic project and application settings. Double-click to open the Project Designer. |
My Movie Collection Starter Kit In-Depth
This section describes the workings of the My Movie Collection kit, and suggests entry points for your customizations.
Online search
(Web Plus edition only) The application is making an online search request for this data, and it is responding back with XML describing the resulting data. This is analogous to visiting the Web page and performing a search; the application programmatically makes a request to the Web service, and the service responds back with XML data.
Notice that only a few lines of code are used to fill a list of DVD objects and bind them to the screen in the PerformSearch method of the SearchOnline.vb file.
'object responsible for containing dvd search results
Dim searchResults As New BindingList(Of DVD)
'simple wrapper object responsible for handling requests and responses from the Amazon.com Web service
Dim amazonService As New SimpleAmazonWS
'show hour glass during the search to tell users that work is being done
Me.Cursor = Cursors.WaitCursor
Try
'request search results from the Web service passing in the user's search criteria
searchResults = amazonService.SearchDVDs(Me.SearchTextBox.Text)
'data bind the search results to the form UI
Me.DVDBindingSource.DataSource = searchResults
Catch ex As Exception
MsgBox(String.Format("There was a problem connecting to the Web service. Please verify that you are connected to the Internet. Additional details: {0}", ex.Message))
My.Application.Log.WriteException(ex)
Finally
'set cursor back to the default now that work is done
Me.Cursor = Cursors.Default
End Try
'tell the user how many results were found. Use String.Format feature to concat strings in a Localization-friendly way
Me.Label2.Text = String.Format("{0} results found. ", searchResults.Count.ToString)
End Sub
This method creates a List of DVD objects, and then calls the simplified Amazon.com Web service to fetch DVD search results based on search criteria (specified by the SearchTextBox control on the user’s display). The SearchOnline control is then data bound to the list of DVD object results returned by the Web service. This is done by setting the control’s DataConnector.Datasource = [List of DVD objects].
Data binding
Visual Basic treats this data like a list of DVD objects and can bind (or base the data in) the controls to it. Visual Basic Express Edition permits you to bind user interface elements to several kinds of data:
- databases
- objects
- Web services
Creating elements bound to data is as easy as drag and drop, or using the smart tag on a particular control. You can then write additional code to rebind your element to data dynamically, so long as it's the same kind of data.
For example, from your online search for DVD titles, click the first, then second items in the results list. Notice that the grid has been populated with data from the web service.
Clicking on a particular item shows details in the boxes on the right side. The application also retrieves images from the image URL and displays them in the Picture Box, if there are any. This is done asynchronously.
Now, select your favorite item and click Add to Collection. The following code is executed.
'try to add data to the collection
Try
'check boundary cases where DVD list is empty or there is no current selection
If (Me.DVDBindingSource.Count > 0) AndAlso (Me.DVDBindingSource.Current IsNot Nothing) Then
'object that stores the current DVD selection
Dim currentDVD As DVD = CType(Me.DVDBindingSource.Current, DVD)
'try to cache the image to the dvd object
If Me.PictureBox1.Image IsNot Nothing Then
'try loading from picture box first
currentDVD.ImageCache = Me.PictureBox1.Image
ElseIf currentDVD.ImageUrl <> "" Then
'else try from the source URL
Me.PictureBox1.Load(currentDVD.ImageUrl)
currentDVD.ImageCache = Me.PictureBox1.Image
End If
'convert custom DVD object to the datable / datarow format used by the application, and
'add the datarow to the datatable
My.Forms.MainForm.ListDetailsPart.DVDCollectionDataSet.DVDs.AddDVDsRow(currentDVD)
'update display to show ListDetailsPart with new row selected
My.Forms.MainForm.ListDetailsPart.DVDsBindingSource.MoveLast()
My.Forms.MainForm.ShowListDetailsPart()
Else
MsgBox("No DVD is selected. Please select a DVD before adding to collection. ")
End If
Catch ex As Exception
MsgBox("There was a problem adding this DVD to the collection. ")
My.Application.Log.WriteException(ex)
End Try
End Sub
This step converts the list of DVD objects into the format used by the DVD collection, the DVDCollectionDataSet, and then adds a new DVDCollectionRow. This step is analogous to entering a DVD title into the collection by hand. You can see the code that does the conversion by viewing the DVDCollectionDataSet.vb file.
The application dynamically starts viewing the collection again. At this point you can refine the data in the editable fields. You can also provide personalized data like comments and a rating.
User controls
The My Rating field is implemented as a user control named RatingPicker.vb, created in Visual Basic. If you look at the form in design mode, you won't see the RatingPicker control - it's created when the form loads in the InitRatingPickerControl() method.
You may have noticed that when you move the mouse over the RatingPicker control that the stars "light up" as you pass over them. This is handled in the Star_MouseHover method with the following code:
If Not Me.m_Initializing Then
Select Case (hoverOverStar.Name)
Case Me.Star1.Name
Me.PreviewNewRating(RatingPickerValue.Poor)
Case Me.Star2.Name
Me.PreviewNewRating(RatingPickerValue.BelowAverage)
Case Me.Star3.Name
Me.PreviewNewRating(RatingPickerValue.Average)
Case Me.Star4.Name
Me.PreviewNewRating(RatingPickerValue.AboveAverage)
Case Me.Star5.Name
Me.PreviewNewRating(RatingPickerValue.Excellent)
End Select
End If
The stars (Star1, Star2, etc.) are picture boxes contained in the user control. Depending on which star the mouse is over, the PreviewNewRating method is called with a RatingPickerValue. The following code sets the Image for each star based on the rating:
Dim setimage As Bitmap = My.Resources.star_filled
Select Case (newRating)
Case RatingPickerValue.NotSet
Me.Star1.Image = notsetimage
Me.Star2.Image = notsetimage
Me.Star3.Image = notsetimage
Me.Star4.Image = notsetimage
Me.Star5.Image = notsetimage
Case RatingPickerValue.Poor
Me.Star1.Image = setimage
Me.Star2.Image = notsetimage
Me.Star3.Image = notsetimage
Me.Star4.Image = notsetimage
Me.Star5.Image = notsetimage
Case RatingPickerValue.BelowAverage
Me.Star1.Image = setimage
Me.Star2.Image = setimage
Me.Star3.Image = notsetimage
Me.Star4.Image = notsetimage
Me.Star5.Image = notsetimage
Case RatingPickerValue.Average
Me.Star1.Image = setimage
Me.Star2.Image = setimage
Me.Star3.Image = setimage
Me.Star4.Image = notsetimage
Me.Star5.Image = notsetimage
Case RatingPickerValue.AboveAverage
Me.Star1.Image = setimage
Me.Star2.Image = setimage
Me.Star3.Image = setimage
Me.Star4.Image = setimage
Me.Star5.Image = notsetimage
Case RatingPickerValue.Excellent
Me.Star1.Image = setimage
Me.Star2.Image = setimage
Me.Star3.Image = setimage
Me.Star4.Image = setimage
Me.Star5.Image = setimage
Case Else
Me.Star1.Image = notsetimage
Me.Star2.Image = notsetimage
Me.Star3.Image = notsetimage
Me.Star4.Image = notsetimage
Me.Star5.Image = notsetimage
End Select
You could easily customize the control to use different images, or to display ratings on a scale of ten instead of five.
For more information
- Provide feedback on this documentation here.
- Other Visual Basic Starter Kits are available here.
- Get further details on Visual Basic Express Edition here.
© 2000 Microsoft Corporation and/or its suppliers. All rights reserved. Terms of Use.


Theory¶
The derivation of the Kapchinsky-Vladimirsky differential equations is shown here.
Maxwell Equations¶
Bulk current density of the beam \(\jmath = \rho\upsilon\), where \(\rho\) is the bulk charge density, \(\upsilon\) is the beam velocity. We write the differential equations of Maxwell:
where \(\vec {D}\) is the induction of the electric field, \(\vec {H}\) is the magnetic field strength, \(c\) is the speed of light. We use the Stokes theorem on the integration of differential forms to obtain Maxwell’s equations in integral form:
Find \(D_r\) for a cylindrical beam of radius \(a\) with constant density \(\rho_0\):
Given that in a vacuum \(D = E\), \(H = B\), \(E\) - electric field strength, \(B\) - magnetic field induction, and in flat space in a Cartesian coordinate system \(H_\alpha =\beta D_r\), where \(\displaystyle\beta =\frac {\upsilon} {c}\), the radial component of the force \(F_r\) from the Lorentz force \(\vec {F} = e\vec {E} +\displaystyle\frac {e} {c}\vec {\upsilon}\times\vec {B}\):
It is useful to express the field through the current \(I =\rho_0\upsilon\pi a ^ 2\) then:
Equations of motion¶
Newton’s second law \(\dot p_r = F_r\), we use the paraxial approximation and consider \(\gamma = const\):
we got a linear equation, but since all the particles are moving, we need to take into account that \(a = a (t)\). The solution of the linear equation can be represented as a linear transformation of the phase plane. Since a segment on the phase plane under a non-degenerate linear transformation goes into a segment, it can be characterized by a single point. Therefore, we choose the extreme point $ r = a $, which will characterize the extreme trajectory:
We proceed to differentiation with respect to $ z $, taking into account that \(\displaystyle dt =\frac {dz} {v}\), then:
We introduce the characteristic Alfven current \(I_a =\displaystyle\frac {mc ^ 3} {e}\approx\) 17 kA, therefore:
We take into account external focusing, assuming a superposition of fields (it is not always true, for example, in nonlinear media this is not true), we obtain:
which resembles the equation of the envelope:
where \(w =\displaystyle\sqrt\beta.\)
Envelope equations for an elliptical beam with Kapchinsky-Vladimirsky distribution with external focusing by linear fields¶
Kapchinsky-Vladimirsky distribution:
where \(A\) is the Courant-Snyder invariant. Axes of the ellipse:
The field is obtained linearly inside the charged elliptical cylinder:
Check that \(\nabla\vec {E} = 4\pi\rho:\)
Since the fields are linear, they are added to the fields of the focusing lens. Substitute \(\displaystyle a =\sqrt\epsilon_x w_x, b =\sqrt\epsilon_y w_y:\) in the envelope equation
where \(k_ {xt} = k_x + k_ {xsc}\) is the total stiffness, \(k_x\) is the stiffness of the lens, and \(\displaystyle k_ {xsc} =\frac {4I} {I_a (\beta\gamma) ^ 3}\frac {1} {a (a + b)}.\) As a result, we obtain a system of equations connected through a space charge:
Quantitative criterion for the applicability of the flow laminarity approximation¶
This system of equations makes it possible to take into account 2 effects that interfere with focusing the beam at a point — the finiteness of the emmittance and the space charge. Members work the same way, so you can compare these values.
When the current \(I\) is small - weak repulsion, if the current \(I\) is large - strong repulsion, therefore, the emmittance can be discarded and the flow can be considered laminar. Obviously, a quantitative criterion for the applicability of laminar flow is as follows:
It can be seen that the space charge affects the envelope more where the \(\beta\) function is greater, and in the vicinity of the focus, the influence of the space charge can be neglected.
Bush’s Theorem¶
As an addition to the derivation of the equation of the envelope of the beam, we prove an important auxiliary theorem called the Bush theorem. It connects the angular velocity of a charged particle moving in an axially symmetric magnetic field with a magnetic flux enveloped in a circle centered on the axis and passing through the point at which the particle is located.
Consider the charge $ q $ moving in a magnetic field \(\vec B = (B_r, 0, B_z)\). We equate the \(\theta\) component of the Lorentz force with the time derivative of the momentum divided by \(r\):
The flow penetrating the area covered by a circle of radius $ r $, the center of which is located on the axis, and it passes through the point at which the charge is located, is written in the form \(\psi =\int\limits ^ r_0 2\pi r B_z dr\) . When a particle moves by \(\vec {dl} = (dr, dz)\), the rate of change of the flow covered by this circle can be found from the second Maxwell equation \(\nabla\vec {B} = 0.\) Thus,
After integration over time, from the above equations we obtain the following expression:
Paraxial Ray Equation¶
Here we write the equation of the paraxial ray in the form corresponding to a system with axial symmetry under the assumptions made earlier. To derive the equation of the paraxial ray, we equate the force of radial acceleration to the forces of electric and magnetic from the side of external fields. It must be remembered that the value \(\gamma =\gamma (t).\)
We apply the Bush theorem and the independence of \(B_z\) from \(r:\)
Exclude \(\dot\theta\) and substitute \(\displaystyle\dot\gamma\approx\frac {\beta q E_z} {mc}:\)
Envelope equation for round and elliptical beams¶
Given that:
And also, if there are no charges in the beam region, then expanding into a Taylor series in the vicinity of the axis and leaving only the first term, taking
Then we can finally write the envelope equation for a round beam of radius \(r\) with a Kapchinsky-Vladimirsky distribution with external focusing by linear fields:
and for an elliptical beam:
Magnetic Lenses¶
The focusing elements can be: solenoids and magnetic quadrupole lenses.
Solenoids¶
\(k_x = k_y = k_s\) - stiffness of the solenoid:
Quadrupoles¶
$ k_q = \displaystyle `:nbsphinx-math:frac {eG}` {pc}$ is the quadrupole stiffness, where $ G = \displaystyle `:nbsphinx-math:frac {partial B_x}` {\partial `y} = :nbsphinx-math:displaystyle :nbsphinx-math:frac {partial B_y}` {\partial `x }$ is the magnetic field gradient, and :math:`k_x = k_q, k_y = -k_q.
Longitudinal beam dynamics¶
The equation for the longitudinal dynamics of the beam can be solved independently of the equation for the envelope, so that the ready-made function of the beam energy of $ z $ is already used in the equation for the envelope. Assuming that the electron velocity is close enough to the speed of light and therefore its longitudinal coordinate is \(z \approx ct\), and the momentum is \(p_z \approx \gamma mc\)
Then it is enough to integrate the function \(E_z (z)\) once.
Solution of the envelope equation for an elliptical beam with focusing elements¶
The envelope equation for an elliptical beam with half axes $ a, b $ with the Kapchinsky-Vladimirsky distribution with external focusing by linear fields:
Let \(\displaystyle x = \frac {da} {dz}, y = \frac {db} {dz}, \displaystyle \frac {d \gamma} {dz} \approx \frac {e E_z} {mc ^ 2 },\) then:
Let \(\vec X = \begin{bmatrix} x \\ a \\ y \\ b \end{bmatrix}\), we now compose the differential equation \(X '= F (X).\)
Trajectory equation for one particle¶
The vector potential in the solenoid has only one component and is easily expressed in terms of \(B_z (z)\):
Therefore, the Lagrangian in a cylindrical coordinate system has the form:
Axial symmetry implies the existence of an integral of motion:
Differentiating by \(z\) we get:
And in the paraxial approximation:
From:
Then the equations of the trajectory in the given coordinates look like this:


This template allows you to edit feature service layers in the
map. The template allows you to choose from one of three color schemes
(blue, green, gray). When viewed from desktop browsers you can choose
to display the edit toolbar which adds more advanced editing
functionality to the application. Mobile browsers do not display the
edit toolbar.
Table of Contents
Install the Web application
These instructions assume that you have a web server like Internet Information Services
(IIS)
installed and setup on your machine. If you are using another web
server the general installation steps will be the same but you will
need to check your web server's documentation for specific information
on deploying and testing the application.
- Copy the contents of the zip file into your web server's
root directory. In IIS, the default location for the root
folder is
c:\inetpub\wwwroot
.
- If your application edits features in a feature service,
enables the elevation chart, contains secure services, web maps that
aren't publicly shared, or generates requests that exceed 2000
characters you may need to setup and use a proxy page. Common
situations where you may exceed the URL length are, using complex
polygons as input to a task or specifying a spatial reference using
well-known text (WKT).
For details on installing and
configuring a proxy page, see Using
the proxy page. After setting up the proxy set the
proxyurl
option in index.html to point to the location of your proxy.
- Test the page using the following URL:
http://localhost/[template name]/index.html, where [template name] is
the name of the folder where you extracted the zip contents.
Configure the application
Now let's configure the application to use a different map,
title or subtitle.
- Every
map you save contains a unique identifier. You’ll
use this ID to configure the
application.To
obtain the ID, log in and open the map you
want to include in your application.If
you own the map, make sure it is shared with everyone.
View
the map details and copy
the ID from the URL in the top of your browser. The section you need to
copy is highlighted in yellow in the image below.
- To modify the map, replace the string for webmap with your
map's id. For example:
function init(){
//The ID for the map
webmap = "dbd1c6d52f4e447f8c01d14a691a70fe
- Modify sharingurl, found
inside index.html, to point to your sharing service URL if you are using an ArcGIS Online organization or Portal for
ArcGIS.
- The default value is null, and
automatically attempts to use www.arcgis.com.
- For an organization, specify the url as
follows:
http://MyOrg.maps.arcgis.com
- For Portal for ArcGIS, specify the url as follows: http://<fully qualified
domain name>/<web adaptor instance name>. For
example,
http://myportal.domain.com/arcgis.
sharingurl: "Sharing URL
- If your map contains data from Bing Maps, enter your Bing
Maps key in commonConfig.js.
bingmapskey = "Enter your Bing Maps key here";
- Save the file then test your application. Note that it
now displays your map and your custom title and subtitle, if specified.
Configure custom utility services and
other external URLs
Your Edit application can be configured to use your
own
utility services. Additionally, any other externally facing URLs can be
customized to point to URLs within your network, except where otherwise
noted. The instructions below detail the steps necessary to configure
your application in a disconnected environment.
- Specify a
custom print service. In commonConfig.js, replace the URL
value in quotes for the printTask
property with your custom print service. For example:
printTask:{
url: location + protocol + "//MyServer/../rest/services/Utilities/PrintingTools/GPServer/Export%20Web%20Map%20Task"
}
Note:
If a custom print service is not configured, the application uses the
ArcGIS.com default print service.
- Specify a
custom geometry
service. In
commonConfig.js, replace the URL
value in quotes for the geometry
property with your custom print service. For example:
geometry:{
url: location + protocol + "//MyServer/../rest/services/Geometry/GeometryServer"
}
Note:
If a custom geometry service is not configured, the application uses
the
ArcGIS.com default geometry service.
- Specify a
custom geocode
service. In
commonConfig.js, replace the URL
value in quotes for the geocode
property with your custom print service. For example:
geocode:{
url: location + protocol + "//MyServer/../rest/services/World/GeocodeServer"
}
Note:
If a custom geocode
service is not configured, the application uses the
ArcGIS.com World geocode service by default.
- Search and
replace Javascript API (JSAPI) references. In index.html, use a text
search to find all instances of
"//serverapi.arcgisonline.com/jsapi/arcgis/3.5". Your search should find three
references to the ArcGIS.com JSAPI. Replace these three references with
your internally hosted JSAPI. Be aware you may need to modify the
search and replace text strings to correctly update the references to
point to your
hosted JSAPI.
If you are using Portal for ArcGIS, you can update
the references to use the portal's internally hosted JSAPI,
for
example:
Search for: //serverapi.arcgisonline.com/jsapi/arcgis/3.5
Replace with: //MyPortalServer.domain.com/arcgis/jsapi/jsapi
Confirm the update
was successful by opening one of the updated references in a web
browser. If the file contents are displayed properly in the web
browser, the
update was succesful. For example:
Open in web browser: "http://MyPortalServer.domain.com/arcgis/jsapi/jsapi/js/dojo/dojox/layout/resources/FloatingPane.css"
Note: If
JSAPI
references are not updated, the application uses the JSAPI hosted by
ArcGIS.com.


Essential Links
We are the girls of MS_Gang
MS_Gang_Girls
| SL. |
Name |
Roll |
Copy Button |
Result |
| i |
Fatema-1 |
|
|
|
| i |
Nijhum |
|
|
|
| i |
Bani |
|
|
|
| i |
Ema |
|
|
|
| i |
Mou |
|
|
|
| i |
Mim |
|
|
|
| i |
Seli |
|
|
Not Published..! |
| i |
Tonima |
|
|
Not Published..! |
| i |
Roja |
|
|
Not Published..! |
| i |
Nitu |
|
|
Not Published..! |
| i |
Nishi |
|
|
Not Published..! |
| i |
Laboni |
|
|
Not Published..! |
| i |
Kona |
|
|
Not Published..! |
| i |
Fatema-2 |
|
|
Not Published..! |
| i |
Tisha |
|
|
Not Published..! |
| i |
Eva |
|
|
Not Published..! |
| i |
Irin |
|
|
Not Published..! |
| i |
Jui |
|
|
Not Published..! |
| i |
Roshni |
|
|
Not Published..! |
| i |
Mrittika |
|
|
Not Published..! |
| i |
Naima |
|
|
Not Published..! |
| i |
Riya |
|
|
Not Published..! |
| i |
Babli |
|
|
Not Published..! |
| i |
Dristi |
|
|
Not Published..! |
| i |
Sumaya |
|
|
Not Published..! |
| i |
Sonia |
|
|
Not Published..! |
| i |
Jemi |
|
|
Not Published..! |
| i |
Tania |
|
|
Not Published..! |
| i |
Toma |
|
|
Not Published..! |
| i |
Sonia |
|
|
Not Published..! |
| i |
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Class SettableGridViewBase<T>
A convenient base class to inherit from when implementing ISettableGridView<T> that minimizes the number of items you must implement by implementing indexers in terms of a single indexer taking a Point.
Inheritance
Inherited Members
Namespace: SadRogue.Primitives.GridViews
Assembly: TheSadRogue.Primitives.dll
Syntax
public abstract class SettableGridViewBase<T> : ISettableGridView<T>, IGridView<T>
Type Parameters
| Name | Description |
|---|---|
| T |
Properties
| Improve this Doc View SourceCount
Declaration
public int Count { get; }
Property Value
| Type | Description |
|---|---|
| Int32 |
Height
The height of the grid being represented.
Declaration
public abstract int Height { get; }
Property Value
| Type | Description |
|---|---|
| Int32 |
Item[Point]
Interface designed to act as a standardized input/output format that defines minimal required data for algorithms that operate and make changes to a grid of some sort. For a concrete implementation to subclass for custom implementations, see SettableGridViewBase<T>.
Declaration
public abstract T this[Point pos] { get; set; }
Parameters
| Type | Name | Description |
|---|---|---|
| Point | pos | Location to get/set the value for. |
Property Value
| Type | Description |
|---|---|
| T | The "value" associated with the provided location. |
Remarks
See IGridView<T>. This interface serves the same purpose, but for cases when it is also necessary for an algorithm to be able to change the value at each location.
Like IGridView, a number of implementations of this interface to cover common needs are provided. For example, ArrayView<T> defines the interface such that the data is retrieved from and set to an array, and LambdaSettableGridView<T> defines the interface such that arbitrary callbacks are used to retrieve and set the data.
Item[Int32]
Interface designed to act as a standardized input/output format that defines minimal required data for algorithms that operate and make changes to a grid of some sort. For a concrete implementation to subclass for custom implementations, see SettableGridViewBase<T>.
Declaration
public T this[int index1D] { get; set; }
Parameters
| Type | Name | Description |
|---|---|---|
| Int32 | index1D | 1D index of location to get/set the "value" for. |
Property Value
| Type | Description |
|---|---|
| T | The "value" associated with the given location. |
Remarks
See IGridView<T>. This interface serves the same purpose, but for cases when it is also necessary for an algorithm to be able to change the value at each location.
Like IGridView, a number of implementations of this interface to cover common needs are provided. For example, ArrayView<T> defines the interface such that the data is retrieved from and set to an array, and LambdaSettableGridView<T> defines the interface such that arbitrary callbacks are used to retrieve and set the data.
Item[Int32, Int32]
Interface designed to act as a standardized input/output format that defines minimal required data for algorithms that operate and make changes to a grid of some sort. For a concrete implementation to subclass for custom implementations, see SettableGridViewBase<T>.
Declaration
public T this[int x, int y] { get; set; }
Parameters
| Type | Name | Description |
|---|---|---|
| Int32 | x | X-value of location. |
| Int32 | y | Y-value of location. |
Property Value
| Type | Description |
|---|---|
| T | The "value" associated with that location. |
Remarks
See IGridView<T>. This interface serves the same purpose, but for cases when it is also necessary for an algorithm to be able to change the value at each location.
Like IGridView, a number of implementations of this interface to cover common needs are provided. For example, ArrayView<T> defines the interface such that the data is retrieved from and set to an array, and LambdaSettableGridView<T> defines the interface such that arbitrary callbacks are used to retrieve and set the data.
Width
The width of the grid being represented.
Declaration
public abstract int Width { get; }
Property Value
| Type | Description |
|---|---|
| Int32 |


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This blog post shows a few different types of content that's supported and styled with Bootstrap. Basic typography, images, and code are all supported.
Hello I am Ritabrata Das. This is an app called Ethernova.
Ethereum in the narrow sense refers to a suite of protocols that define a platform for decentralised applications.
At the heart of it is the Ethereum Virtual Machine (“EVM”), which can execute code of arbitrary algorithmic complexity.
Understanding Ethereum
Let us understand Ethereum from the bellow writepost.
What is Ethereum?
Ethereum is a blockchain platform with its own cryptocurrency, called Ether (ETH) or Ethereum, and its own programming language, called Solidity. As a blockchain network, Ethereum is a decentralized public ledger for verifying and recording transactions. Its cryptocurrency is now second only to Bitcoin in market value.
Ethereum?
Ethereum is a permissionless, non-hierarchical network of computers (nodes) which build and come to consensus on an ever-growing series of "blocks".
Why Use Ethereum?
Ethereum enables the deployment of smart contracts and decentralized applications (dapps) to be built and run without any downtime, fraud, control or interference from a third party.
- Open-Source
- Safe
- Easy-to-handle
Advantages of Ethereum
- Decentralised Finance
- Popular among other cryptocurrencies.
- Ethereum’s open source concept allows for developers to build entirely new cryptocurrencies on top of it, like Chainlink and XRP, which are known as tokens.
New features
Ethereum has regained it's popularoty on the basis on the implementation of it's new features like:.
- Easy Scalability
- Increased Throughput
- Efficient Security
Thus, Ethereum has the best cryptocurrency efficiency and popular among them.


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