[gecode-users] Stability of a solution
Christian Schulte
cschulte at kth.se
Wed Oct 16 13:57:32 CEST 2013
Hi,
Not really knowing the details, I think this looks like a feasible plan even
though it all depends on whether the second point in your list is
sufficiently easy to do.
Cheers
Christian
--
Christian Schulte, Professor of Computer Science, KTH,
www.ict.kth.se/~cschulte/
-----Original Message-----
From: users-bounces at gecode.org [mailto:users-bounces at gecode.org] On Behalf
Of Philippe
Sent: Wednesday, October 16, 2013 11:04 AM
To: users at gecode.org
Subject: Re: [gecode-users] Stability of a solution
Hi Christian,
Thank you very much for your help.
Even if your solution is the one I had in mind, I'm not sure that we have
the same assumptions :
The constraints remains the same (for instance "allocate some task to
device", "A task cannot be allocated more than once", ...) but the domain
of the variables change (for instance, the priority of a task, the duration
of a task) that's what I call "minor changes of the problem". but I can also
have new tasks, removed tasks. In that case, the changes are not so minor.
However, I was thinking about a solution similar to yours :
- find the best task's affectations of the new problem
- Once done, do the same but add the constraint that "the task's affectation
to optimize must be the same than the one found in the old problem"
- check if the space fails. If not, retrieve the cost.
So, here is the pseudo code :
-----------------------------
// First, find the new task affectation
TaskAff * taskAff = new TaskAff(tasks, priorities, durations); BAB<TaskAff>
search_engine(taskAff, opt); delete taskAff;
while(TaskAff *taskAff = search_engine.next())
{
taskAff->get_solution(affectations);
delete taskAff;
}
// second, do the same but with a new constraint "affectations =
previous_aff"
//
TaskAff * taskAff = new TaskAff(tasks, priorities, durations, previous_aff);
If (! taskAff->failed())
{
taskAff->get_cost();
delete taskAff;
}
Are we ok ?
Cheers,
Philippe
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{% extends "layout.html" %} {% block main %} {% from "flask_user/_macros.html" import render_field %}
{{ _("Registrations are collected from the User.registration timestamps of all Users without the Test Role") }}
{{ _("Logins are collected from the start_time timestamps of Encounters whose auth_method='password_authenticated'") }}
{{ _("Intervention Logins are filtered based on the login Encounter's User's User.interventions, and represent the number of users associated with that intervention who have logged in within the given timeframe (whether or not they accessed the intervention during that login session") }}
| {{_("Source")}} | {{ _("Today") }} | {{ _("This Month") }} | {{ _("This Year") }} | {{ _("All Time") }} |
|---|---|---|---|---|
| {{ _("Registrations") }} | {{ counts['registrations'] | selectattr("day", "equalto", now.day) | selectattr("month", "equalto", now.month) | selectattr("year", "equalto", now.year) | list | length }} | {{ counts['registrations'] | selectattr("month", "equalto", now.month) | selectattr("year", "equalto", now.year) | list | length }} | {{ counts['registrations'] | selectattr("year", "equalto", now.year) | list | length }} | {{ counts['registrations'] | length }} |
| {{ _("Logins") }} | {{ counts['encounters']['all'] | selectattr("day", "equalto", now.day) | selectattr("month", "equalto", now.month) | selectattr("year", "equalto", now.year) | list | length }} | {{ counts['encounters']['all'] | selectattr("month", "equalto", now.month) | selectattr("year", "equalto", now.year) | list | length }} | {{ counts['encounters']['all'] | selectattr("year", "equalto", now.year) | list | length }} | {{ counts['encounters']['all'] | length }} |
| {{ k }} | {{ v | selectattr("day", "equalto", now.day) | selectattr("month", "equalto", now.month) | selectattr("year", "equalto", now.year) | list | length }} | {{ v | selectattr("month", "equalto", now.month) | selectattr("year", "equalto", now.year) | list | length }} | {{ v | selectattr("year", "equalto", now.year) | list | length }} | {{ v | length }} |
{{ _("User stats are collected from all Users without the Test Role") }}
{{ _("Role counts are tallied from User.roles (e.g. a User with both the Patient and Staff Roles, would add 1 to both Roles' counts)") }}
{{ _("No Diagnosis") }}: {{ _("Users whose User.observations does not contain any Observations where the Observation.codeable_concept=CC.BIOPSY and the Observation.value_quantity.value=True") }}
{{ _("Diagnosis, No Treatment") }}: {{ _("Users where known_treatment_not_started(User)=True") }}
{{ _("Diagnosis and Treatment") }}: {{ _("Users where known_treatment_started(User)=True") }}
{{ _("Metastasis") }}: {{ _("Users whose User.observations contains any Observations where the Observation.codeable_concept=CC.PCaLocalized and the Observation.value_quantity.value!=True") }}
| {{ _("Role") }} | {{ _("User Count") }} |
|---|---|
| {{ _("Patients - All") }} | {{ counts['roles']['patient'] }} |
| {{ _("Patients - No Diagnosis") }} | {{ counts['patients']['pre-dx'] }} |
| {{ _("Patients - Diagnosis, No Treatment") }} | {{ counts['patients']['dx-nt'] }} |
| {{ _("Patients - Diagnosis and Treatment") }} | {{ counts['patients']['dx-t'] }} |
| {{ _("Patients - Metastasis") }} | {{ counts['patients']['meta'] }} |
| {{ _("Partners") }} | {{ counts['roles']['partner'] }} |
| {{ _("Clinicians") }} | {{ counts['roles']['staff'] }} |
{{ _("User stats are collected from all Users without the Test Role") }}
{{ _("Intervention counts only apply to those interventions that control their subject list manually (eg Sexual Recovery, Care Plan, Community of Wellness). They are tallied from User.interventions (e.g. a User with both the 'Care Plan' and 'Community of Wellness' interventions, would add 1 to both Interventions' counts)") }}
| {{ _("Intervention") }} | {{ _("User Count") }} |
|---|---|
| {{ k }} | {{ v }} |
{{ _("User stats are collected from all Users without the Test Role") }}
{{ _("Completed Reports are tallied for each User that has any number of PatientReports for that Intervention (e.g. whether a User has 1 or 100 PatientReports for 'Symptom Tracker', that User only adds 1 to that Intervention's Completed Reports tally)") }}
{{ _("Completed Reports are only shown for an Intervention if the report count is above 0") }}
| {{ _("Intervention (Reports)") }} | {{ _("User Count") }} |
|---|---|
| {{ k }} | {{ v }} |
{{ _("User stats are collected from all Users without the Test Role") }}
{{ _("Intervention Access counts reflect the number of users who could access said intervention, regardless of whether or not they've actually accessed it.") }}
| {{ _("Intervention (Access)") }} | {{ _("User Count") }} |
|---|---|
| {{ k }} | {{ v }} |
{{ _("Organization counts are collected from the User.organizations of all Users without the Test Role") }}
{{ _("'None of the above' refers to Users who specifically selected the 'None of the above' organization option") }}
{{ _("'Unspecified' refers to Users who have not yet been assigned to any Organization option (including 'None of the above')") }}
| {{ _("Organization Name") }} | {{ _("User Count") }} |
|---|---|
| {{ k }} | {{ v }} |


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- Andrea Authoriser
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Payment details
Payments made on 12 April 2017
| Contract | Description | Amount |
|---|---|---|
| 16AP-4222 | 16-18 Apprenticeships Reconcilliation Apr 2017 | £96,067.55 |
| 16AP-4222 | 16-18 Trailblazer Apprenticeships Reconcilliation Apr 2017 | £9,696.66 |
| AAC-1343 | 19+ Apprenticeships Profile Apr 2017 | £522,372.00 |
| AEC-1427 | Adult Education Budget Profile Apr 2017 | £2,276,865.00 |
| AGE-3219 | Employer Incentive 19-24 Capping Mar 2017 | -£3,000.00 |
| AGE-3219 | National careers service offenders leaning and skills service in custody Mar 2017 | £3,000.00 |
| ALLC-2673 | Advance Learener Loans Bursary Profile Apr 2017 | £299,760.00 |
| Total | £3,204,761.21 |


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Next.js has been designed for gradual adoption. With Next.js, you can continue using your existing code and add as much (or as little) React as you need. By starting small and incrementally adding more pages, you can prevent derailing feature work by avoiding a complete rewrite.
The first strategy is to configure your server or proxy such that,
everything under a specific subpath points to a Next.js app. For example,
your existing website might be at example.com
, and you might
configure your proxy such that example.com/store
serves a
Next.js e-commerce store.
Using
basePath
, you can configure your Next.js application’s assets and links to
automatically work with your new subpath /store
. Since each
page in Next.js is its own
standalone route, pages like
pages/products.js
will route to
example.com/store/products
in your application.
// next.config.js
module.exports = {
basePath: '/store',
}
To learn more about basePath
, take a look at our
documentation.
This feature was introduced in Next.js 9.5 and up. If you’re using older versions of Next.js, please upgrade before trying it out.
The second strategy is to create a new Next.js app that points to the root
URL of your domain. Then, you can use
rewrites
inside next.config.js
to have some subpaths to be proxied to
your existing app.
For example, let’s say you created a Next.js app to be served from
example.com
with the following next.config.js
.
Now, requests for the pages you’ve added to this Next.js app (e.g. /about
if you’ve added pages/about.js
) will be handled by Next.js,
and requests for any other route (e.g. /dashboard
) will be
proxied to proxy.example.com
.
// next.config.js
module.exports = {
async rewrites() {
return {
// After checking all Next.js pages (including dynamic routes)
// and static files we proxy any other requests
fallback: [
{
source: '/:path*',
destination: `https://proxy.example.com/:path*`,
},
],
}
// For versions of Next.js < v10.1 you can use a no-op rewrite instead
return [
// we need to define a no-op rewrite to trigger checking
// all pages/static files before we attempt proxying
{
source: '/:path*',
destination: '/:path*',
},
{
source: '/:path*',
destination: `https://proxy.example.com/:path*`,
},
]
},
}
To learn more about rewrites, take a look at our documentation.
This feature was introduced in Next.js 9.5 and up. If you’re using older versions of Next.js, please upgrade before trying it out.
Next.js and Vercel make it straightforward to adopt micro-frontends and deploy as a Monorepo. This allows you to use subdomains to adopt new applications incrementally. Some benefits of micro-frontends:
Once your monorepo is set up, push changes to your Git repository as usual and you’ll see the commits deployed to the Vercel projects you’ve connected.
To learn more, read about subpaths and rewrites or deploy an example with micro-frontends.


{% extends 'base.html' %} {% block title %} Page Not Found {% endblock title %} {% block content %} Four... Oh, four...
It seems that the page you were trying to reach doesn't exist.
Return to the home page.


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Sat Dec 23, 2006
I while back I got fined for parking at work. Yes, at work. The injustice of the situation hardened my resolve to never pay this fine. After a few softcore letters I received this hardcore final notice, which I kept because it is a fine example of Aristotelian logos, pathos and ethos being used to full effect.
After reading it, I was almost persuaded to pay the fine because I thought I was being sued - at first. I then noticed all the cunningly placed “mays” and decided they were just trying to scare me.
A few months later, the case was handed over to some debt collectors, and they sent me this letter.
Needless to say, I was disappointed. After the previous rhetorical tour de force, this skimpy letter was positively anti-climatic. Not only that, but the grammar is astoundingly poor. Note the quintuplet ellipses. What did they do that for? Why did they have to be so grammatically offensive? After recieving this letter, I was certain I would never be tempted to pay this fine…ever.
The other night, after a bout of insomnia, I decided to pay this fine because God had a gentle word with me. He told me that paying was the right thing to do, and that I needn’t worry about my finances because I would be well taken care of in the future. He also said that I needed to write a letter to Mr. Bird and persuade him to cease profiting from the misery of others. I am to inform Mr. Bird that his job could hardly be spiritually fulfilling and that he should rethink his station in life. So, that’s what I’ll do. When I’m done writing that letter, I’ll share it with you.


Resume
Overview
Jason Gilbert
Saguenay, Quebec, Canada ·<PHONE_NUMBER> ·<EMAIL_ADDRESS>20 years old programmer and IT enthusiast in general | Very curious | I love learning stuff | ISJT
Experience
Developer C#/.NET
CGI Group Inc.
September 2017 - Present
Consulting | C#/.NET, WinForms, ASP.NET (MVC), HTML, Javascript, AngularJS, CSS, GIT, TFS, MSSQL, SSMS
Baker
Tim Hortons Inc.
May 2015 - March 2016
Evening & night. Worked there between highschool & College Multihexa (which required to be 18).
Education
Université du Québec à Chicoutimi
CS Certificate
August 2018 - In Progress
Avg. : ?
Collège Multihexa
1-Year Attestation of College Studies (ACS)
March 2016 - March 2017
Avg. : 89%
Odyssée Dominique-Racine
High School
September 2012 - June 2015
Avg. : 82%
Skills
Technologies & Tools
- .NET
- Visual Studio
- MSQL Server
- Git
- JIRA
- HTML5
- Javascript
- CSS3
- Bootstrap
- PHP
- Laravel
- Linux
- GitHub
- Open Source
Other
- Agile Development & Scrum
- Cross Functional Teams
- Debugging, Unit Testing & Quality Assurance
- Responsive & Reusable Design
- Documentation
About
Born in '97, I am a young programmer and IT enthusiast in general. Very curious and interested in pretty much everything, I like to deeply understand stuff before doing it.
My favorites subjects are sciences & technologies, computers and psychology for naming a few.
I love to code personal projects and play video games in my spare time. I should start reading some books too.
I Attended a 1-year intensive private college in programming when I was 18 (never wrote a line of code before that, so I started to code pretty late compared to some people), I got my diploma and applied for a 3-month internship at CGI Group, where I am still working today as full time developer.
My favorite programming language is C#/.NET since this is the one that I have the most experience with, but I wouldn't mind playing with another general-purpose language like Java, PHP or C++ if I had to.
My main language is french since this is what I use in my day-to-day life, but I'd say I am pretty fluent in english and I am constantly working on improving myself (regular uses at my job and pastimes).
MBTI ISTJ.
Achievements
- Setuping my linux home server which is hosting my email, website and other future projects.
- Developing my website from the ground up.
- Building a portable RetroPie All-In-One arcade box.
- Working a full time programmer job in Canada's Top 1 Computer Services Company by the age of 19.
- Building and customizing my own gaming computer from scratch.


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| {{x.Title}} | {{x.StartDate | date:'MM/dd/yyyy'}} | {{x.EndDate | date:'MM/dd/yyyy'}} | Update |
Delete
|


Forms - Another Exercise
Create a page that submits a search to Google
Creating your own Google search is easy
Houston
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prefers-reduced-motion
an important, but often overlooked, CSS media feature
Write all CSS rules that should be applied to users requesting reduced motion content in a media query selecting the prefers-reduced-motion
media feature.
Generic Animation Override Example
This snippet of CSS completely prevents most animations from happening on a webpage for users with reduced motion settings enabled. For all other users, it will still move.
@media (prefers-reduced-motion) { * { animation: none !important; transition: none !important; } }
This snippet currently exists in the head of of this page. If you have enabled reduced motion settings on your machine, the header "Generic Animation Override Example" will not move. Additionally, the dark mode toggle at the top left of the page will also not slide, but snap into place as it is toggled.
Enabling Reduced Motion
To request usage of reduced motion media on your machine, take the appropriate actions as follows for the device being used:
- Windows 10: Settings > Ease of Access > Display > Show animations in Windows.
- Windows 7: Control Panel > Ease of Access > Make the computer easier to see > Turn off all unnecessary animations (when possible).
- macOS: System Preferences > Accessibility > Display > Reduce motion.
- iOS: Settings > General > Accessibility > Reduce Motion.
- Android 9+: Settings > Accessibility > Remove animations.
As of Chrome 79, you can also test the prefers-reduced-motion
feature in your browser without enabling the reduced motions settings across the entire OS.
- Open the Chrome developer tools by inspecting the page,
ctrl+shift+i
, or otherwise. - Click on the 3 vertical dots it the top right, and click "Run command", OR press
ctrl+shift+p
while the dev tools are open. - Run the
Show Rendering
command. This will open the "Rendering" panel below. - Using the "Emulate CSS media feature prefers-reduced-motion" dropdown, select the "prefers-reduced-motion: reduce" option.


RIP JD Salinger. Odd that I just blogged about my first time reading him mere days ago.
1/28/2010, 11:13:18 PM
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RIP JD Salinger. Odd that I just blogged about my first time reading him mere days ago.
1/28/2010, 11:13:18 PM
Favs: 0
Retweets: 0
link


How I resolved WindowManager BadTokenException for Toast#handleShow()?
Blog by theDroidLady
Introduction
“Every problem is a gift — without problems, we would not grow.” ― Anthony Robbins
When we have to display information for a short span of time in Android, we use Toast. Here are some key features:
1) It provides simple feedback about an operation in a small popup.
2) It is a view containing a quick little message for the user.
3)It only fills the amount of space required for the message and the current activity remains visible and interactive.
Recently, I started getting a major number of crashes for Toast#handleShow() on Crashlytics.
Here are the logs:
Fatal Exception: android.view.WindowManager$BadTokenException
Unable to add window -- token android.os.BinderProxy@f839de9 is not valid; is your activity running?
android.view.ViewRootImpl.setView (ViewRootImpl.java:697)
android.view.WindowManagerGlobal.addView (WindowManagerGlobal.java:347)
android.view.WindowManagerImpl.addView (WindowManagerImpl.java:94)
android.widget.Toast$TN.handleShow (Toast.java:463)
android.widget.Toast$TN$2.handleMessage (Toast.java:346)
android.os.Handler.dispatchMessage (Handler.java:102)
android.os.Looper.loop (Looper.java:163)
android.app.ActivityThread.main (ActivityThread.java:6377)
java.lang.reflect.Method.invoke (Method.java)
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run (ZygoteInit.java:904)
Before the analysis, it’s important for you to know about WindowManager.BadTokenException.
Exception that is thrown when trying to add view whose LayoutParams LayoutParams#token is invalid.
Lets, Look at the WindowManagerService.java file.
WindowManagerService (WMS) is a system service that manages the windows on Android.
Window Tokens:
As the name suggest, a window token is a special type of Binder token used by window manager to uniquely identify a window in the system. Window tokens are important for security reasons because they make it impossible for malicious applications to draw on top of the windows of other applications. The window manager protects against this by requiring applications to pass their application’s window token as part of each request to add or remove a window. If the tokens don’t match, the window manager rejects the request and throws a BadTokenException. Without window tokens, this necessary identification step wouldn’t be possible and the window manager wouldn’t be able to protect itself from malicious applications.
A real-world scenario:
When an application starts up for the first time, the ActivityManagerService creates a special kind of window token called an application window token, which uniquely identifies the application’s top-level container window. The activity manager gives this token to both the (*application) and the window manager, and it sends the token to the window manager each time it wants to add a new window to the screen. This ensures secure interaction between the application and the window manager (by making it impossible to add windows on top of other applications), and also makes it easy for the activity manager to make direct requests to the window manager.
And the code that throws “BadTokenException” :
Return WindowManagerGlobal.ADD_BAD_APP_TOKEN
If returned the WindowManagerGlobal.ADD_BAD_APP_TOKEN, the exception occurs when the WMS.addWindow () function is called to check whether the window to be added is not in violation of the policy according to the android window policy.
So now, after all, my research and analysis on BadTokenException, what I noticed about all the crashes there on Crashltyics:
All were on Android 7.1 (API level 25).
I compared the API level 25 Toast class and others for the difference and I found an interesting thing there:
From API 25, Android added a new param IBinder windowToken for Toast#handleShow(), and It brought an exception. 😪
Let me show you the code:
As you can see here, they try-catch the mWM.addView(mView, mParams)
Since the notification manager service cancels the token right after it notifies us to cancel the toast there is an inherent race and we may attempt to add a window after the token has been invalidated. Let us hedge against that.
However, API level 25 is still at risk. We had to capture it on our own else it would have continued to produce an exception for the users.
This exception occurs regardless of whether the Context you passed to Toast is an Activity or ApplicationContext or Service. And you can not try-catch it.
Solution :
So I created a library that possesses a ToastHandler class which is responsible for showing Toast smoothly on all API versions and replaced the base Context to a ToastContextWrapper, it will hook the WindowManagerWrapper.addView(view, params) method and fix the exception.
You just need to add this in your app/build.gradle:
implementation 'com.toastfix:toastcompatwrapper:{latest_version}'
Now, you are all good to use your Toast :
ToastHandler.INSTANCE.showToast(this, "Hi,I am Toast", Toast.LENGTH_LONG)
You can find the source code here.
Happy Coding !!


Design Challenges
Participants
Design Solutions
Locating city services within City Hall should be quick process, how can we design a better way finding system so that we can make this effortless?
Opportunities to contribute
Ideation workshop on 02/18/20
Locating city services within City Hall should be quick process, how can we design a better way finding system so that we can make this effortless?
Opportunities to contribute
Ideation workshop on 02/18/20
When our neighbors attend City Commission meetings, how do we ensure that we are providing a good experience? What tools can we provide to help simplify the process and to overcome barriers?
Opportunities to contribute
Usability testing from 2/11/2020 to 2/21/20
This survey is to help us understand your experience with the City of Gainesville website. It should take approximately 5-10 minutes. We will be incorporating your feedback into the website redesign.
welcomeGNV is a website that helps new residents and students get settled into Gainesville. Explore the site and submit feedback by clicking on the blue bar at the top of the page.
statGNV lets you explore the City of Gainesville's data through interactive charts, graphs, and maps. You can now easily understand complex city data and track important trends in areas such as public safety, basic city services, human services, economic development, and others.
Locating city services within City Hall should be quick process, how can we design a better way finding system so that we can make this effortless?
Opportunities to contribute
Ideation workshop on 02/18/20
Locating city services within City Hall should be quick process, how can we design a better way finding system so that we can make this effortless?
Opportunities to contribute
Ideation workshop on 02/18/20
When our neighbors attend City Commission meetings, how do we ensure that we are providing a good experience? What tools can we provide to help simplify the process and to overcome barriers?
Opportunities to contribute
Usability testing from 2/11/2020 to 2/21/20
This survey is to help us understand your experience with the City of Gainesville website. It should take approximately 5-10 minutes. We will be incorporating your feedback into the website redesign.
welcomeGNV is a website that helps new residents and students get settled into Gainesville. Explore the site and submit feedback by clicking on the blue bar at the top of the page.
statGNV lets you explore the City of Gainesville's data through interactive charts, graphs, and maps. You can now easily understand complex city data and track important trends in areas such as public safety, basic city services, human services, economic development, and others.


Some personal recording projects and links to MIT wind ensemble (MITWE) concerts I've played trombone on
A recording I mixed where I played all 5 trombone parts to Stan Kenton's Here's That Rainy Day
Recorded separately during Covid-19 times and featuring many chamber ensembles
A recording of a brass quintet I played with the MIT wind ensemble
Featuring Holst's Hammersmith and one of my favorite wind band pieces, Mannin Veen


Introduction
Text objects (t2dTextObject) allow string of dynamic text to exist
within the Scene, without requiring the GUI to be involved. They are a
lower level replacement to bitmap sprites representing text,
making them mostly useful for large blocks of text or mock ups. Static
sprites will always be more attractive and flexible, but text objects
are available for quick uses.
Creation
To create a text object, start by navigating to the Create Tab. In the Other Panel, located at the very
bottom, click on the Text Object button and drag it into the scene. Drop it where you would like your Text Object to be created.
When the object is first dropped, it will be in Text Edit mode. Write out the string of text that you would like it to contain.
Alternately, you can click the Text Edit Tool on the Toolbar and then click in your scene to place the new Text Object.
When you have finished editing the text, click anywhere in the Scene View outside of the Text Object to exit Text Edit mode.
Properties
- Font - Font to use for this Text Object.
- Alignment
- Left - Each line begins at the left bounds of the object.
- Right - Each line ends at the right bounds of the object.
- Center - Each line of text is centered within the object bounds.
- Justify - Text on complete lines is spaced out to fill the object bounds.
- Character Height - Height of the characters.
- Line Spacing - Space between each line of text.
- Character Spacing - Space between each character.
- Horizontal Scale - Amount of horizontal space the TextObject takes up.
- Word Wrap - If true, words will automatically wrap to the next line when reaching the end of the TextObject area.
- Hide Overflow - If true, text outside of the TextArea will not render.
- Filtered - Enables or Disables the filtering on the TextObject.
- No Unicode - Disables intensive unicode conversions (if unicode is not required).
- Integer Precision - Allows the text object to work on integer levels, avoiding half-pixel imprecisions.
Script Representation
new t2dTextObject() {
size = "1.0 2.0";
font = "Arial";
wordWrap = "0";
hideOverflow = "0";
textAlign = "Center";
lineHeight = "2.0";
aspectRatio = "1";
lineSpacing = "0";
characterSpacing = "0";
autoSize = "1";
fontSizes = "80";
};
Conclusion
Text Objects allow dynamic text to exist in your scene, good for
dynamic numbers such as in-scene scoreboards and more. With clever
scripting work, you can replace the text object functionality using
static sprites. |


This guide references the following value sets.
| Name | Definition |
| v3-ConfidentialityClassification | http://hl7.org/fhir/ValueSet/v3-ConfidentialityClassification Set of codes used to value Act.Confidentiality and Role.Confidentiality attribute in accordance with the definition for concept domain "Confidentiality". |
| DischargeSummaryDocumentTypeCode | urn:oid:2.16.840.1.1138<IP_ADDRESS>.1 A value set of LOINC document codes for discharge summaries. Specific URL Pending |
| ConsultDocumentType | urn:oid:2.16.840.1.1138<IP_ADDRESS>.31 Specific URL Pending |
| ReferralDocumentType | urn:oid:2.16.840.1.1138<IP_ADDRESS>.2.3 A referral note provides a consulting physician specified patient information about the patient referred. Specific URL Pending |
| ProcedureNoteDocumentTypeCodes | urn:oid:2.16.840.1.1138<IP_ADDRESS>.1 A value set of LOINC document codes for Procedure Notes. Specific URL Pending |
| HPDocumentType | urn:oid:2.16.840.1.1138<IP_ADDRESS>.22 Specific URL Pending |
| LOINC Imaging Document Codes | urn:oid:<IP_ADDRESS>.4.1.12<IP_ADDRESS> A value set of LOINC document type codes for Diagnostic Imaging Reports. |
| DIRSectionTypeCodes | urn:oid:2.16.840.1.1138<IP_ADDRESS>.59 The Section Type codes used by DIR are all narrative document sections. The codes in this table are drawn from LOINC (http://www.loinc.org/) and DICOM (http://medical.nema.org/). The section/code should be selected from LOINC or DICOM for sections not listed in this table. |
| SurgicalOperationNoteDocumentTypeCode | urn:oid:2.16.840.1.1138<IP_ADDRESS>.1 Specific URL Pending |
| ProgressNoteDocumentTypeCode | urn:oid:2.16.840.1.1138<IP_ADDRESS>.1 Specific URL Pending |


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Perception, Planning, and Control
© Russ Tedrake, 2020-2023
Last modified .
How to cite these notes, use annotations, and give feedback.
Note: These are working notes used for a course being taught at MIT. They will be updated throughout the Fall 2023 semester.
| Previous Chapter | Table of contents | Next Chapter |
Our study of geometric perception gave us good tools for estimating the pose of a known object. These algorithms can produce highly accurate estimates, but are still subject to local minima. When the scenes get more cluttered/complicated, or if we are dealing with many different object types, they really don't offer an adequate solution by themselves.
Deep learning has given us data-driven solutions that complement our geometric approaches beautifully. Finding correlations in massive datasets has proven to be a fantastic way to provide practical solutions to these more "global" problems like detecting whether the mustard bottle is even in the scene, segmenting out the portion of the image / point cloud that is relevant to the object, and even in providing a rough estimate of the pose that could be refined with a geometric method.
There are many sources of information about deep learning on the internet, and I have no ambition of replicating nor replacing them here. But this chapter does being our exploration of deep perception in manipulation, and I feel that I need to give just a little context.
The modern revolution in computer vision was unquestionably fueled by
the availability of massive annotated datasets. The most famous of all is
ImageNet, which eclipsed previous datasets with the number of images and
the accuracy and usefulness of the labels
... annotations fall into one of two categories: (1) image-level annotation of a binary label for the presence or absence of an object class in the image, e.g., "there are cars in this image" but "there are no tigers," and (2) object-level annotation of a tight bounding box and class label around an object instance in the image, e.g., "there is a screwdriver centered at position (20,25) with width of 50 pixels and height of 30 pixels".
The COCO dataset similarly enabled pixel-wise instance-level
segmentation
Instance segmentation turns out to be an very good match for the perception needs we have in manipulation. In the last chapter we found ourselves with a bin full of YCB objects. If we want to pick out only the mustard bottles, and pick them out one at a time, then we can use a deep network to perform an initial instance-level segmentation of the scene, and then use our grasping strategies on only the segmented point cloud. Or if we do need to estimate the pose of an object (e.g. in order to place it in a desired pose), then segmenting the point cloud can also dramatically improve the chances of success with our geometric pose estimation algorithms.
The ImageNet and COCO datasets contain labels for a variety of interesting classes, including cows, elephants, bears, zebras and giraffes. They have a few classes that are more relevant to manipulation (e.g., plates, forks, knives, and spoons), but they don't have a mustard bottle nor a can of potted meat like we have in the YCB dataset. So what are we do to? Must we produce the same image annotation tools and pay for people to label thousands of images for us?
One of the most amazing and magical properties of the deep architectures that have been working so well for instance-level segmentation is their ability to transfer to new tasks ("transfer learning"). A network that was pre-trained on a large dataset like ImageNet or COCO can be fine-tuned with a relatively much smaller amount of labeled data to a new set of classes that are relevant to our particular application. In fact, the architectures are often referred to as having a "backbone" and a "head" -- in order to train a new set of classes, it is often possible to just pop off the existing head and replace it with a new head for the new labels. A relatively small amount of training with a relatively small dataset can still achieve surprisingly robust performance. Moreover, it seems that training initially on the diverse dataset (ImageNet or COCO) is actually important to learn the robust perceptual representations that work for a broad class of perception tasks. Incredible!
This is great news! But we still need some amount of labeled data for our objects of interest. The last few years have seen a number of start-ups based purely on the business model of helping you get your dataset labeled. But thankfully, this isn't our only option.
Just as projects like LabelMe helped to streamline the process of
providing pixel-wise annotations for images downloaded from the web,
there are a number of tools that have been developed to streamline the
annotation process for robotics. One of the earliest examples was
LabelFusion, which combines geometric perception of point clouds
with a simple user interface to very rapidly label a large number of
images
In LabelFusion, the user provides multiple RGB-D images of a static
scene containing some objects of interest, and the CAD models for those
objects. LabelFusion uses a dense reconstruction algorithm,
ElasticFusion
Tools like LabelFusion can be use to label large numbers of images very quickly (three clicks from a user produces ground truth labels in many images).
All of this real world data is incredibly valuable. But we have another super powerful tool at our disposal: simulation! Computer vision researchers have traditionally been very skeptical of training perception systems on synthetic images, but as game-engine quality physics-based rendering has become a commodity technology, roboticists have been using it aggressively to supplement or even replace their real-world datasets. The annual robotics conferences now feature regular workshops and/or debates on the topic of "sim2real". For any specific scene or narrow class of objects, we can typically generate accurate enough art assets (with material properties that are often still tuned by an artist) and environment maps / lighting conditions that rendered images can be highly effective in a training dataset. The bigger question is whether we can generate a diverse enough set of data with distributions representative of the real world to train robust feature detectors in the way that we've managed to train with ImageNet. But for many serious robotics groups, synthetic data generation pipelines have significantly augmented or even replaced real-world labeled data.
There is a subtle reason for this. Human annotations on real data,
although they can be quite good, are never perfect. Labeling errors can
put a ceiling on the total performance achievable by the learning
system
For the purposes of this chapter, I aim to train an instance-level segmentation system that will work well on our simulated images. For this use case, there is (almost) no debate! Leveraging the pre-trained backbone from COCO, I will use only synthetic data for fine tuning.
You may have noticed it already, but the RgbdSensor
that we've been using in Drake actually has a "label image" output port that we haven't used yet.
This output port exists precisely to support the perception training use case we have here. It outputs an image that is identical to the RGB image, except that every pixel is "colored" with a unique instance-level identifier.
I've provided a simple script that runs our "clutter generator" from our bin picking example that drops random YCB objects into the bin. After a short simulation, I render the RGB image and the label image, and save them (along with some metadata with the instance and class identifiers) to disk.
I've verified that this code can run on Colab, but to make a dataset of 10k images using this un-optimized process takes about an hour on my big development desktop. And curating the files is just easier if you run it locally. So I've provided this one as a python script instead.
You can also feel free to skip this step! I've uploaded the 10k images that I generated here. We'll download that directly in our training notebook.
There is a lot to know about modern object detection and segmentation pipelines. I'll stick to the very basics.
For image recognition (see Figure 1), one can imagine training a standard
convolutional network that takes the entire image as an input, and outputs a
probability of the image containing a sheep, a dog, etc. In fact, these
architectures can even work well for semantic segmentation, where the input
is an image and the output is another image; a famous architecture for this
is the Fully Convolutional Network (FCN)
The mainstream approach to this is to first break the input image up into
many (let's say on the order of 1000) overlapping regions that might
represent interesting sub-images. Then we can run our favorite image
recognition and/or segmentation network on each subimage individually, and
output a detection for each region that that is scored as having a high
probability. In order to output a tight bounding box, the detection
networks are also trained to output a "bounding box refinement" that selects
a subset of the final region for the bounding box. Originally, these region
proposals were done with more traditional image preprocessing algorithms, as
in R-CNN (Regions with CNN Features)
For instance segmentation, we will use the very popular Mask R-CNN
network which puts all of these ideas, using region proposal networks and a
fully convolutional networks for the object detection and for the masks
torchvision
package; we'll stick to the torchvision
version for our
experiments here.
The following notebook loads our 10k image dataset and a Mask R-CNN network pre-trained on the COCO dataset. It then replaces the head of the pre-trained network with a new head with the right number of outputs for our YCB recognition task, and then runs just a 10 epochs of training with my new dataset.
Training a network this big (it will take about 150MB on disk) is not fast. I strongly recommend hitting play on the cell immediately after the training cell while you are watching it train so that the weights are saved and downloaded even if your Colab session closes. But when you're done, you should have a shiny new network for instance segmentation of the YCB objects in the bin!
I've provided a second notebook that you can use to load and evaluate the trained model. If you don't want to wait for your own to train, you can examine the one that I've trained!
We can use our Mask R-CNN inference in a manipulation to do selective picking from the bin...
One of the goals for these notes is to consider "open-world" manipulation -- making a manipulation pipeline that can perform useful tasks in previously unseen environments and with unseen models. How can we possibly provide labeled instances of every object the robot will ever have to manipulate?
The most dramatic examples of open-world reasoning have been coming
from the so-called "foundation models"
More coming soon...
For this exericse, you will look into a simple trick to automatically generate training data for Mask-RCNN. You will work exclusively in . You will be asked to complete the following steps:
For this exercise, you will use Mask-RCNN and our previously developed antipodal grasp strategy to select a grasp given a point cloud. You will work exclusively in . You will be asked to complete the following steps:
| Previous Chapter | Table of contents | Next Chapter |


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FROM: DAVID KUBA. NO.10 ANDERSON STREET JOHANNESBURG, SOUTH AFRICA TEL: +27-83-9470181 FAX: +27-865173471 EMAIL<EMAIL_ADDRESS>ATTENTION: DIRECTOR /CEO. ATTENTION: DIRECTOR /CEO. STRICTLY PRIVATE AND CONFIDENTIAL You may be surprised to receive this letter from me since you don't know me personally, the purpose of my introduction is that, I am MR.DAVID KUBA,the first SON of MR.PEDRO KUBA,a farmer and leader movement for Democratic change (MDC)in Zimbabwe who was murdered in the land dispute in Zimbabwe. I was furnished with viable information from the International Trade Centre here in Johannesburg and I decided to write to you. Before the death of my father, he had taken me to Johannesburg to deposit the sum of US$40 M(FOURTY MILLION UNITED STATES DOLLARS),in a Security Company, as if he fore saw the looming danger in Zimbabwe. This amount was meant for the purchase of new machines and chemicals for the farms and the establishment of the new farms in Swaziland. This land problem came when Zimbabwean President MR.ROBERT MUGABE introduced a new Land Act which wholly affected the rich white farmers and some few black farmers.This resulted to the killing and mob action by Zimbabwean war veterans and some lunatics in the society. Infact, alot of people have been killed because of this land reformed Act for which my father was one of the victims. It is against this background, that I and my family who are currently staying in South Africa decided to transfer my father's money to foreign account since the law of South Africa prohibit a refugee (asylum seeker) to open any bank account or to be involved in any financial transaction. As the eldest SON of my father, I am saddled with the responsibility of seeking a genuine foreign account where this money could be transferred without the knowledge of my government who are bent on taking everything we have got. I am faced with the dilemma of investing this amount of money in South Af rica for fear of going through the same experience in future since both countries have similar political history. Moreover,the South African Foreign Exchange policy does not allow such investment as an asylum seeker. As a business man,whom I have entrusted my future and of my family in his hands,I must let you know that this transaction is risk free. If you accept to assist me and my family. will aid us in transferring the money into any account you will nominate overseas. This money I intend to use for investment. I have two options for you, firstly you can choose to have a certain percentage of the money for nominating your account for this transaction. Or you can go into partnership with me for the proper profitable investment of the money in your country. Which ever the option you want, feel free to notify me as I have also mapped out 5% of this money for all kinds of expenses incurred in the proccess of this transaction. If you do not prefer a partnership I am willing to give you 20% of the money while the remaining 75% will be for my investment in your country. Contact me with the above telephone number while I implore you to maintain the absolute secrecy required in this transaction. And no matter the level of transaction we are, you must call me on phone first before sending a reply. Please, You should keep this transaction secret and confidential. And send your fax and telephone numbers for easy communication.  2) YOUR FULL NAME. 3) YOUR FULL ADDRESS. THANKS FOR YOUR CO-OPERATION DAVID KUBA (FOR THE FAMILY)


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We just need a few more details to configure your SynBioHub instance.
Try to choose something descriptive to identify the kind of parts your SynBioHub instance will store. Don't worry, you can change this later.
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For best results, upload an SVG or high resolution PNG.
We need to know where this SynBioHub instance is hosted so we can assign URLs to your submissions. The instance URL has been automatically guessed as http://localhost:7777/ , but if this is incorrect, please change it here.
We need to know how to prefix URIs of objects stored in this SynBioHub. Its default is the same as the URL, and should only be changed if you are shadowing another instance.
We need to know where the Virtuoso INI is stored. We have guessed it to be /etc/virtuoso-opensource-7/virtuoso.ini , but if this is incorrect, please change it here.
We need to know the location of the Virtuoso DB directory. We have guessed it to be /virtuoso , but if this is incorrect, please change it here.
Here, you can set up an external auth provider. Select one from the list and provide additional information.
Selected auth:
This is the path in your application that users are redirected to after they have authenticated with Google. The path will be appended with the authorization code for access. Must have a protocol. Cannot contain URL fragments or relative paths. Cannot be a public IP address.


{% include "includes/square.html" with game=game index=0 value=game.board_str.0 %}
{% include "includes/square.html" with game=game index=1 value=game.board_str.1 %}
{% include "includes/square.html" with game=game index=2 value=game.board_str.2 %}
{% include "includes/square.html" with game=game index=3 value=game.board_str.3 %}
{% include "includes/square.html" with game=game index=4 value=game.board_str.4 %}
{% include "includes/square.html" with game=game index=5 value=game.board_str.5 %}
{% include "includes/square.html" with game=game index=6 value=game.board_str.6 %}
{% include "includes/square.html" with game=game index=7 value=game.board_str.7 %}
{% include "includes/square.html" with game=game index=8 value=game.board_str.8 %}


public class Main
extends javafx.application.Application
| Modifier and Type | Field and Description |
|---|---|
private static java.lang.String |
ABOUT
Text displayed in the 'About' dialog.
|
private javafx.scene.control.TextField |
acFX
TextField where the value of the accumulator will be displayed. |
private javafx.scene.control.TextField |
arFX
TextField where the value of the address register will be displayed. |
static javafx.scene.input.KeyCombination |
ASSEMBLING
KeyCombination for assembling. |
private java.util.ArrayList<Code> |
codes
ArrayList of currently open Code documents. |
private javafx.scene.control.TabPane |
codesFX
|
private Computer |
computer
Computer used for running simulations. |
private javafx.scene.control.TextArea |
consoleFX
TextArea in the application window where messages will be logged. |
private javafx.scene.control.TextField |
drFX
TextField where the value of the data register will be displayed. |
private javafx.scene.control.TextField |
eFX
TextField where the value of the carry bit flip-flop will be displayed. |
private javafx.scene.control.TextField |
fgiFX
TextField where the value of the input flag flip-flop will be displayed. |
private javafx.scene.control.TextField |
fgoFX
TextField where the value of the output flag flip-flop will be displayed. |
private javafx.scene.control.TextField |
ienFX
TextField where the value of the interrupt enable flip-flop will be displayed. |
private javafx.scene.control.TextField |
iFX
TextField where the value of the indirect addressing flip-flop will be displayed. |
private javafx.scene.control.TextField |
inprFX
TextField where the value of the input register will be displayed. |
private javafx.scene.control.TextField |
inputFX
TextField where the user's input will be displayed. |
private javafx.scene.control.TextField |
irFX
TextField where the value of the instruction register will be displayed. |
private javafx.scene.control.TextField |
microoperationFX
TextField where the currently executing microoperation will be displayed. |
private javafx.scene.control.TextField |
outrFX
TextField where the value of the output register will be displayed. |
private javafx.scene.control.TextField |
pcFX
TextField where the value of the program counter will be displayed. |
private Program |
program
The most recently compiled program.
|
private javafx.scene.control.TableView<Memory> |
ramFX
TableView where the current state of RAM will be displayed. |
private javafx.scene.control.TextField |
rFX
TextField where the value of the interrupt flip-flop will be displayed. |
private javafx.scene.control.ToggleButton |
runFX
ToggleButton for running and pausing the simulation. |
static javafx.scene.input.KeyCombination |
SAVING
KeyCombination for saving. |
private javafx.scene.control.TextField |
scFX
TextField where the value of the sequence counter will be displayed. |
private javafx.scene.control.TextField |
sFX
TextField where the value of the s flip-flop will be displayed. |
private javafx.scene.control.Slider |
speedFX
Slider for adjusting the speed of the simulation. |
private javafx.stage.Stage |
stage
The contents of the application window.
|
private javafx.scene.control.TabPane |
tabsFX
TabPane where instructions, the console, and the simulation are shown. |
private javafx.concurrent.Task<java.lang.Void> |
task
The
Task for running the simulation. |
private static java.lang.String |
TITLE
Title of the application.
|
private javafx.scene.control.TextField |
trFX
TextField where the value of the temporary register will be displayed. |
| Constructor and Description |
|---|
Main()
Initializes the application window with an empty
ArrayList of Code documents. |
| Modifier and Type | Method and Description |
|---|---|
private void |
aboutOnAction()
Called when the 'About Mano Simulator' button is pressed.
|
private void |
assembleAllOnAction()
Called when the 'Assemble All' button is pressed.
|
private void |
assembleOnAction()
Called when the 'Assemble' button is pressed.
|
private void |
bind()
Binds the application controls to simulation values.
|
private void |
closeOnAction()
Called when the 'Close' button is pressed.
|
private void |
exportOnAction()
Called when the 'Export' button is pressed.
|
private void |
inputEnableOnAction()
Called when the 'Input Enable' button is pressed.
|
void |
inputHelpOnAction()
Called when the '?' button is pressed.
|
static void |
main(java.lang.String[] args)
Starting point for the application.
|
private void |
newOnAction()
Called when the 'New' button is pressed.
|
private void |
openOnAction()
Called when the 'Open...' button is pressed.
|
private void |
outputEnableOnAction()
Called when the 'Output Enable' button is pressed.
|
void |
quitOnAction()
Called when the 'Quit' button is pressed.
|
private void |
resetOnAction()
Called when the 'Reset' button is pressed.
|
private void |
runOnAction()
Called when the 'Run' button is toggled.
|
void |
saveAllOnAction()
Called when the 'Save All' button is pressed.
|
private void |
saveAsOnAction()
Called when the 'Save as...' button is pressed.
|
private void |
saveOnAction()
Called when the 'Save' button is pressed.
|
void |
start(javafx.stage.Stage stage)
Used to launch the application.
|
private void |
stepOnAction()
Called when the 'Step' button is pressed.
|
private void |
updateSimulation(Program program) |
private static final java.lang.String TITLE
private static final java.lang.String ABOUT
public static final javafx.scene.input.KeyCombination SAVING
KeyCombination
for saving.public static final javafx.scene.input.KeyCombination ASSEMBLING
KeyCombination
for assembling.private javafx.scene.control.TabPane codesFX
private javafx.scene.control.TabPane tabsFX
TabPane
where instructions, the console, and the simulation are shown.private javafx.scene.control.TextArea consoleFX
TextArea
in the application window where messages will be logged.private javafx.scene.control.TextField scFX
TextField
where the value of the sequence counter will be displayed.private javafx.scene.control.TextField pcFX
TextField
where the value of the program counter will be displayed.private javafx.scene.control.TextField arFX
TextField
where the value of the address register will be displayed.private javafx.scene.control.TextField irFX
TextField
where the value of the instruction register will be displayed.private javafx.scene.control.TextField drFX
TextField
where the value of the data register will be displayed.private javafx.scene.control.TextField acFX
TextField
where the value of the accumulator will be displayed.private javafx.scene.control.TextField trFX
TextField
where the value of the temporary register will be displayed.private javafx.scene.control.TextField inprFX
TextField
where the value of the input register will be displayed.private javafx.scene.control.TextField outrFX
TextField
where the value of the output register will be displayed.private javafx.scene.control.TextField iFX
TextField
where the value of the indirect addressing flip-flop will be displayed.private javafx.scene.control.TextField sFX
TextField
where the value of the s flip-flop will be displayed.private javafx.scene.control.TextField eFX
TextField
where the value of the carry bit flip-flop will be displayed.private javafx.scene.control.TextField rFX
TextField
where the value of the interrupt flip-flop will be displayed.private javafx.scene.control.TextField ienFX
TextField
where the value of the interrupt enable flip-flop will be displayed.private javafx.scene.control.TextField fgiFX
TextField
where the value of the input flag flip-flop will be displayed.private javafx.scene.control.TextField fgoFX
TextField
where the value of the output flag flip-flop will be displayed.private javafx.scene.control.TextField inputFX
TextField
where the user's input will be displayed.private javafx.scene.control.ToggleButton runFX
ToggleButton
for running and pausing the simulation.private javafx.scene.control.Slider speedFX
Slider
for adjusting the speed of the simulation.private javafx.scene.control.TextField microoperationFX
TextField
where the currently executing microoperation will be displayed.private javafx.scene.control.TableView<Memory> ramFX
TableView
where the current state of RAM
will be displayed.private javafx.stage.Stage stage
private Program program
private javafx.concurrent.Task<java.lang.Void> task
Task
for running the simulation.public Main()
ArrayList
of Code
documents.public static void main(java.lang.String[] args)
args
- Ignored.private void newOnAction()
Code
with Code.Code()
, adds it to codes
, and displays it in codesFX
.private void openOnAction()
File
was picked initializes a new instance of Code
with Code.Code(File)
.private void closeOnAction()
private void saveOnAction()
codesFX
contains any tabs it saves the currently selected Code
document.
If the selected Code
document does not have a file it passes off the job to saveAsOnAction()
.
Otherwise it saves the Code
document with Code.save(Stage)
.public void saveAllOnAction()
codesFX
contains any tabs it saves all of the Code
documents.
Otherwise it saves the Code
document with Code.save(Stage)
.private void saveAsOnAction()
codesFX
contains any tabs it displays a prompt for choosing where to save the current Code
document.
If a File
is chosen will be called followed by a call to Code.saveAs(Stage)
.private void assembleOnAction()
private void resetOnAction()
private void updateSimulation(Program program)
private void assembleAllOnAction()
private void aboutOnAction()
public void inputHelpOnAction()
private void inputEnableOnAction()
private void outputEnableOnAction()
private void runOnAction()
private void stepOnAction()
private void exportOnAction()
public void start(javafx.stage.Stage stage) throws java.io.IOException
start
in class javafx.application.Application
stage
- Essentially the window to display the application in.java.io.IOException
- Occurs when the file 'main.fxml' representing the layout of the application could not be accessed.private void bind()
public void quitOnAction()


This example shows how images are resized and cropped when the plugin is used with custom configuration. The red lines indicate the middle of the image and the blue dot is the focus point. Resize your window to see how much is cropped from the original images.


Feature Overview¶
Based on its feature set, I’d describe Ada as a mirror of C++ in the Pascal family, with many features of Rust.
Covering every Ada feature would be dilute the conceptual overview of Ada, so related Ada-specific terminology is quoted in parentheses for those wanting to do their own targeted research.
Ada supports:
Forced namespacing (“packages”).
Function overloading.
Sum types (“variants”, “discriminants”).
Static polymorphism (monomorphism, “generics”);
Dynamic polymorphism (dynamic dispatch, virtual functions).
Compiler and runtime checked constaints on ranges of numerical types (“ranges”, “constraints”).
User-specified runtime type invariant checking on assignment and usage as parameters (“Type_Invariant”, “Static_Predicate”, “Dynamic_Predicate”).
Semantic types, saying two things are the same backing type, but not the same type of “thing”, think of “Miles” vs “Kilometers” both stored as floats, which cannot be assigned to each other without a cast (“derived types”).
Deterministic construction and destruction of objects (RAII, a term from C++, “controlled types”)
Design-by-contract (“precondition” and “postcondition” “aspects”).
Lifetime checks (“accessibility” of “access types”, very similar to, but not as extensive as Rust).
Task definition with defined synchronization and queueing strategies. (“rendevzous”, “entry”, “select”, “accept”, “abort”, “Ravenscar”)
Concurrency types (“protected”, which provides mutual exclusion, and “task”).
Exceptions.
Deterministic and configurable static initialization order (“preelaborate”, “elaborate”, “elaborate_body”, “elaborate_all”)
ML-style signatures (“packages”, “generics”)
Formal verification, by enabling Spark_Mode for parts of the program and writing in SPARK, a language which is an Ada subset. Think of this along the lines of using extern “C”, except for “provable” parts of your code base.
Ada is missing:
A preprocessor (GNAT has one, but it’s not standard).
A sanitary macro system.
Reflection.
A concept of “move”.
Variadic functions.
Variadic templates.
Async/Await (it has tasks instead)
Mixed-mode arithmetic and the related implicit numerical casts.
An equivalent of template parameter pack


{% extends "base.html" %} {% block content %}
Only students of the physics department can register...


{{customerName}} | Table
{{tableNumber}}
TIP
10%
{{getSubtotalAmount() * 0.10 | currency}}
15%
{{getSubtotalAmount() * 0.15 | currency}}
18%
{{getSubtotalAmount() * 0.18 | currency}}
20%
{{getSubtotalAmount() * 0.20 | currency}}
TOTAL
Sub Total
{{ this.getSubtotalAmount() | currency}}
Tax
{{getTaxAmount() | currency}}
Tip
{{tipSelectedValue | currency}}
Total Amount
{{getTotalAmount() + tipSelectedValue | currency}}


Uche Akogwu is a quintessential entrepreneurial young man; he is a humanitarian,aspiring software programmer,aspiring politician,graduate of cooperative economics and management,digital marketing expert, blogger,reader and a lover of God. Uche is a team player who believes he can do anything by learning anything.
Hi ya! Feel free to contact me for your web projects and business branding (I forgot to mention that i'm quite good with photoshop) and if you also need someone to talk to, just send a message and i'll sure reply as soon as possible!


Cause of Jessi Combs's Fatal 550-MPH Crash in Land Speed Racer Was Front Wheel Failure
by Laura Sky Brown- The cause of the crash that killed land speed racer, TV personality, and daredevil Jessi Combs has been announced by the Harney County (Oregon) sheriff's department.
- Combs was killed in late August while trying to break 512 mph and set a new record as a driver with the North American Eagle team. She had been with the team since 2013.
- Cause of death was determined to be "a mechanical failure of the front wheel, most likely caused from striking an object" during the desert run, the sheriff's office said.
The Harney County, Oregon, sheriff department has released the final results of its investigation into the high-speed crash of the North American Eagle during a land-speed record attempt in late August. According to the department's press release, first reported by TMZ, the front wheel experienced mechanical failure, "most likely caused from striking an object on the desert. The front wheel failure led to the front wheel assembly collapsing."
The report stated that the failure occurred at "speeds approaching 550 mph," and the cause of Combs's death was determined to have been blunt-force trauma to the head that occurred before the fire that engulfed the land-speed-record vehicle.
The press release was dated September 17, but a sheriff department spokesperson told C/D that it was not made public until now while waiting for the medical examiner's report to confirm, which has now occurred.
The department also stated its condolences to the team and to the family of the late racer.
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{{ _('If you maintain your works in our research bibliography, you can embed this list on your own homepage and have it perpetually updated by registering new titles with us.') }}
{% if site == 'rub' %}If you are currently interested in using this service, please consult our docs or contac us.
{% endif %}{{ _('Examples') }}:
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{{ _('With just a few clicks we will make you and your work individually recognisable on the web and in important data sources.') }}
{% if site == 'dortmund' %} {{ _('You can find further information on our ') }}{{ _('ORCID Website') }} {% elif site == 'bochum' %} {{ _('You can find further information on our ') }}{{ _('ORCID Website') }} {% endif %} {{ _('or learn more in this short video clip.') }}
{{ _('If you maintain your works in our research bibliography, you can embed this list on your own homepage and have it perpetually updated by registering new titles with us.') }}
{% if site == 'rub' %}If you are currently interested in using this service, please consult our docs or contac us.
{% endif %}{{ _('This feature will be available soon!') }}


use Red::AST::Infix; use Red::AST::Value; class Red::AST::Sum { ... } class Red::AST::Eq { ... } class Red::AST::Ne { ... } class Red::AST::Lt { ... } class Red::AST::Gt { ... } class Red::AST::Le { ... } class Red::AST::Ge { ... } class Red::AST::AND { ... } class Red::AST::OR { ... } class Red::AST::Mul { ... } class Red::AST::Div { ... } class Red::AST::IDiv { ... } class Red::AST::Mod { ... } class Red::AST::Concat { ... } class Red::AST::Like { ... } class Red::AST::In { ... } #| Represents a sum operation class Red::AST::Sum does Red::AST::Infix { has $.op = "+"; has $.returns = (self.left | self.right).returns ~~ Num ?? Num !! Int; method should-set(--> Hash()) { self.find-column-name => self.find-value } method should-validate {} method find-column-name { gather for self.args { .take for .?find-column-name } } method find-value { for self.args { .return with .?find-value } } } #| Represents a subtraction operation class Red::AST::Sub does Red::AST::Infix { has $.op = "-"; has $.returns = (self.left | self.right).returns ~~ Num ?? Num !! Int; method should-set(--> Hash()) { self.find-column-name => self.find-value } method should-validate {} method find-column-name { gather for self.args { .take for .?find-column-name } } method find-value { for self.args { .return with .?find-value } } } #| Represents a equality operation class Red::AST::Eq does Red::AST::Infix { has $.op = "="; has Bool $.returns; method should-set(--> Hash()) { self.find-column-name => self.find-value } method should-validate {} method find-column-name { gather for self.args { .take if .defined for .?find-column-name } } method find-value { for self.args { .return with .?find-value } } method not { Red::AST::Ne.new: $.left, $.right, :bind-left($.bind-left), :bind-right($.bind-right) } } #| Represents a not equality operation class Red::AST::Ne does Red::AST::Infix { has $.op = "!="; has Bool $.returns; method should-set(--> Hash()) { } method should-validate {} method not { Red::AST::Eq.new: $.left, $.right, :bind-left($.bind-left), :bind-right($.bind-right) } } #| Represents a less than operation class Red::AST::Lt does Red::AST::Infix { has $.op = "<"; has Bool $.returns; method should-set(--> Hash()) { } method should-validate {} method not { Red::AST::Ge.new: $.left, $.right, :bind-left($.bind-left), :bind-right($.bind-right) } } #| Represents a greater than operation class Red::AST::Gt does Red::AST::Infix { has $.op = ">"; has Bool $.returns; method should-set(--> Hash()) { } method should-validate {} method not { Red::AST::Le.new: $.left, $.right, :bind-left($.bind-left), :bind-right($.bind-right) } } #| Represents a less than equal operation class Red::AST::Le does Red::AST::Infix { has $.op = "<="; has Bool $.returns; method should-set(--> Hash()) { } method should-validate {} method not { Red::AST::Gt.new: $.left, $.right, :bind-left($.bind-left), :bind-right($.bind-right) } } #| Represents a greater then equal operation class Red::AST::Ge does Red::AST::Infix { has $.op = ">="; has Bool $.returns; method should-set(--> Hash()) { } method should-validate {} method not { Red::AST::Lt.new: $.left, $.right, :bind-left($.bind-left), :bind-right($.bind-right) } } #| Represents a AND operation class Red::AST::AND does Red::AST::Infix { #also does Red::AST::Optimizer::And; has $.op = "AND"; has Bool $.returns; multi method new(Red::AST $left is copy, Red::AST $right is copy) { my \ret = self.optimize: $left, $right; return ret if ret.DEFINITE && ret !~~ Empty; $left .= value if $left ~~ Red::AST::So; $right .= value if $right ~~ Red::AST::So; return $left if $left eqv $right; return ast-value(False) if $left eqv $right.not; self.WHAT.bless: :$left, :$right } method should-set(--> Hash()) { [$.left, $.right].flatmap({ .should-set }) } method should-validate {} method not { Red::AST::OR.new: $.left.not, $.right.not, :bind-left($.bind-left), :bind-right($.bind-right) } } #| Represents a OR operation class Red::AST::OR does Red::AST::Infix { #also does Red::AST::Optimizer::OR; has $.op = "OR"; has Bool $.returns; multi method new(Red::AST $left is copy, Red::AST $right is copy) { my \ret = self.optimize: $left, $right; return ret if ret.DEFINITE && ret !~~ Empty; $left .= value if $left ~~ Red::AST::So; $right .= value if $right ~~ Red::AST::So; return $left if $left eqv $right; return ast-value(True) if $left eqv $right.not; self.WHAT.bless: :$left, :$right } method should-set(--> Hash()) {} method should-validate {} method not { Red::AST::AND.new: $.left.not, $.right.not, :bind-left($.bind-left), :bind-right($.bind-right) } } #| Represents a multiplication operation class Red::AST::Mul does Red::AST::Infix { has $.op = "*"; has $.returns = (self.left | self.right).returns ~~ Num ?? Num !! Int; method should-set(--> Hash()) { self.find-column-name => self.find-value } method should-validate {} method find-column-name { gather for self.args { .take for .?find-column-name } } method find-value { for self.args { .return with .?find-value } } } #| Represents a division operation class Red::AST::Div does Red::AST::Infix { has $.op = "/"; has Num $.returns; method should-set(--> Hash()) { self.find-column-name => self.find-value } method should-validate {} method find-column-name { gather for self.args { .take for .?find-column-name } } method find-value { for self.args { .return with .?find-value } } } #| Represents a division operation class Red::AST::IDiv does Red::AST::Infix { has $.op = "/"; has Int $.returns; method should-set(--> Hash()) { self.find-column-name => self.find-value } method should-validate {} method find-column-name { gather for self.args { .take for .?find-column-name } } method find-value { for self.args { .return with .?find-value } } } #| Represents a module operation class Red::AST::Mod does Red::AST::Infix { has $.op = "%"; has Int $.returns; method should-set(--> Hash()) { self.find-column-name => self.find-value } method should-validate {} method find-column-name { gather for self.args { .take for .?find-column-name } } method find-value { for self.args { .return with .?find-value } } } #| Represents a concatenation operation class Red::AST::Concat does Red::AST::Infix { has $.op = "||"; has Str $.returns; method should-set(--> Hash()) {} method should-validate {} multi method new(Red::AST $left, Red::AST::Value $ where .value eq "", *%) { $left } multi method new(Red::AST::Value $ where .value eq "", Red::AST $right, *%) { $right } } #| Represents a like operation class Red::AST::Like does Red::AST::Infix { has $.op = "like"; has Str $.returns; method should-set(--> Hash()) {} method should-validate {} multi method new(Red::AST $left, Red::AST::Value $ where .value eq "", *%) { $left } } #| Represents a not in operation class Red::AST::NotIn does Red::AST::Infix { has $.op = "NOT IN"; has Str $.returns; method should-set(--> Hash()) {} method should-validate {} method not { Red::AST::In.new: $!left, $!right; } } #| Represents a in operation class Red::AST::In does Red::AST::Infix { has $.op = "IN"; has Str $.returns; method should-set(--> Hash()) {} method should-validate {} method not { Red::AST::NotIn.new: $!left, $!right; } }


Vision
To be a center of excellence in computer engineering education, empowering graduates as highly skilled professionals.
Mission
• To provide a platform for effective learning with emphasis on technical excellence.
• To train the students to meet current industrial standards and adapt to emerging technologies.
• To instill the drive for higher learning and research initiatives.
• To inculcate the qualities of leadership and Entrepreneurship.
Program Educational Objectives (PEO’s)
1. Provide graduates with both fundamental and advanced concepts of computer science and engineering for acquiring knowledge.
2. To prepare the graduates to apply computer engineering knowledge to build professional career.
3. To enable students to engage in lifelong learning with the ability to involve in higher studies and research.
4. To encourage graduates to imbibe professional ethics and soft skills.
Program Specific Outcome
1: The graduates of the program will have the ability to build software products by applying theoretical concepts and programming skills.
2: The graduates of the program will have the ability to pursue higher studies and Research in the modern computing era.


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SQL
Links
- TSQL Language Ref (MSDN)
- Online SQL Beautifier (wangz.net)
- Data Models (databaseanswers.org)
- UPSERTs (Insert or Update) in SQLServer
- FIFO queues from tables in SQLServer
SQL syntax
- LIKE: _ for single character (as opposed to %)
- Datetimes:
SELECT * FROM Orders WHERE OrderDate < '20080101'; --other strings work but beware locale SELECT CONVERT(DateTime, '20080101', 112); -- 103 is ddmmyyyy, 101 is mmddyyyy SELECT DATEADD(DD, 7, GETDATE()); --7 days from today SELECT CURRENT_TIMESTAMP; --(sql server and oracle) current date time SELECT SYSUTCDATETIME(); --UTC time (DATETIME2, also SYSDATETIMEOFFSET() )
- NULL will trip you up. In C#, null == null, but in SQL NULL <> NULL
- WHERE X = NULL doesn't work. It's WHERE X IS NULL (inverse: IS NOT NULL)
- IS NULL operator is not the same as ISNULL(x,x) function (which is closer to ANSI standard COALESCE)
- For sorting, it's best to use ISNULL/ COALESCE / CASE for NULLs
- SELECT COUNT(X) returns fewer rows than SELECT COUNT(*) because NULL rows are excluded (see also AVG() etc)
- You can't CREATE UNIQUE INDEX IX ON TABLE(X) (but you can add WHERE X IS NOT NULL for a filtered index)
- Parameterized WHERE columns:
@Filter nvarchar(256), @FilterOn nvarchar(256) SELECT * FROM USERS WHERE ( CASE WHEN @FilterOn='UserID' THEN USERS.UserID WHEN @FilterOn='UserRole' THEN USERS.Role WHEN @FilterOn='Name' THEN USERS.Name ELSE USERS.UserID END LIKE @Filter)
- SQLServer2005 paging use ROW_NUMBER() OVER(ORDER BY col) as RowNum
Note you have to repeat the select list in the outer sql too.SELECT ... FROM (SELECT ... , ROW_NUMBER() OVER(ORDER BY ColumnName) as RowNum FROM Employees e) WHERE RowNum BETWEEN @startRowIndex AND (@startRowIndex + @maximumRows) - 1
- Multi-table selects can deadlock against row-level update locks.
- In Sql2000 and Oracle, use dirty reads (or see below for 2005's snapshot)
SELECT * FROM USERS WITH (NOLOCK)
using (TransactionScope tscope =
new TransactionScope(TransactionScopeOption.Required,
new TransactionOptions { IsolationLevel = System.Transactions.IsolationLevel.ReadUncommitted } )) - In Sql2005+, avoid deadlocks with snapshot isolation (which must be enabled first)
ALTER DATABASE AdventureWorks SET ALLOW_SNAPSHOT_ISOLATION ON
using (var tscope =
new TransactionScope(TransactionScopeOption.Required,
new TransactionOptions { IsolationLevel = System.Transactions.IsolationLevel.Snapshot }))
- In Sql2000 and Oracle, use dirty reads (or see below for 2005's snapshot)
Management Notes
- DON'T PREFIX SPROCS WITH "SP_". That looks them up in master database first. A common error.
- Command Line stopping:
NET STOP MSSQLSERVER /Y
(the Y is to stop SQLServerAgent too).
I have to do this to free up memory for VPCs. - Backup/restore across machines- use sp_change_users_login 'Update-One' 'user1', 'user1' to fix the database user to the server user
- To get Identity after an insert:
INSERT INTO [Categories] (CategoryName) VALUES ('Random'); --use @@IDENTITY SET @iid = @@IDENTITY; --SCOPE_IDENTITY() is safer as triggers may be firing SET @sid = SCOPE_IDENTITY();
- BCP: to bulk export a table:
--export bcp database.dbo.MYTABLE out myfile.bcp -N -T --import sqlcmd -ddatabase -Q"delete from dbo.MYTABLE" bcp database.dbo.MYTABLE in myfile.bcp -N -T --with mixed mode authentication, append -Sserver_name\instance_name -Umylogin -Pmypassword
- Rebuild all indexes (2005 version, with 2000 version commented out)
DECLARE @TableName nvarchar(255) DECLARE @sql nvarchar(255) DECLARE TableCursor CURSOR FOR SELECT table_schema + '.' + table_name FROM information_schema.tables WHERE table_type = 'base table' Order by table_name OPEN TableCursor FETCH NEXT FROM TableCursor INTO @TableName WHILE @@FETCH_STATUS = 0 BEGIN --DBCC DBREINDEX(@TableName,' ',90) SET @sql = 'ALTER INDEX ALL ON ' + @TableName + ' REBUILD' EXEC (@sql) FETCH NEXT FROM TableCursor INTO @TableName END CLOSE TableCursor DEALLOCATE TableCursor
- Shrinking the log file
- Renaming constraints (Access can't read SQLServer primary keys with "." in the name)
DECLARE @sql NVARCHAR(MAX); SELECT @sql = ''; SELECT @sql = @sql + 'EXEC sp_rename ''' + QUOTENAME(CONSTRAINT_SCHEMA) + '.' + QUOTENAME(CONSTRAINT_NAME) + ''', N''' + LEFT(CONSTRAINT_NAME,3) + 'ems' + SUBSTRING(CONSTRAINT_NAME,8,99) + ''', ''OBJECT'';'+ char(13) + char(10) FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS WHERE CONSTRAINT_NAME LIKE '%K_dbo.%' AND CONSTRAINT_NAME NOT LIKE '%__MigrationHistory' EXEC sp_executesql @sql;
- ApplicationPoolIdentity doesn't have SQL login (and it's a virtual account):
- for local SQL, add login "IIS APPPOOL\AppPoolName" (change the appPoolname here!)
- for remote SQL, add "domain\serverName$"
Oracle
Oracle 11 has increased security (auto-expiring passwords, case sensitivity).
- In SqlPlus, connect as SYSDBA:
conn sys/secretpassword as sysdba
- Find expired and locked accounts:
select username, account_status from dba_users where account_status like 'EXPIRED%';
- To reset an expired user, change the password:
password HR
New password:
Oralter user HR IDENTIFED BY new_password;
- To unlock a user:
alter user HR account unlock;
- To disable password expiry:
ALTER PROFILE DEFAULT LIMIT PASSWORD_LIFE_TIME UNLIMITED;
To find profile if it's not DEFAULT:select profile from dba_users where username = 'HR';


elexio_api package¶
Submodules¶
elexio_api.grab_image_from_pdf module¶
This is a function to grab an image from a pdf, based on this: https://nedbatchelder.com/blog/200712/extracting_jpgs_from_pdfs.html
-
elexio_api.grab_image_from_pdf.
extract_image
(pdf_bytes)[source]¶ Extracts an image from a pdf
Reads through the pdf bytes searching for the start and end flags for an image.
Parameters: pdf_bytes (bytes) – Bytes from a pdf file. Use open(“fild.pdf”, “rb”) and then .read() to pass to this function Returns: jpeg_bytes – Returns the bytes of the jpeg image Return type: bytes
elexio_api.wheatland module¶
@author: Peter Boone email<EMAIL_ADDRESS>Some functions to pull data from the Elexio API.
Documentation for this API can be found at https://wheatlandpca.elexiochms.com/api_documentation (login required)
-
elexio_api.wheatland.
get_session_id
(username=None, password=None)[source]¶ Posts username and password and returns a session_id string Prompts user for username and password
-
elexio_api.wheatland.
download_all
(session_id, write=True, file_location='', filename='people_all.xlsx', delim='\t')[source]¶ Requests all of the people and saves it in an excel file
-
elexio_api.wheatland.
get_groups
(session_id, write=True, file_location='', filename='groups.xlsx', delim='\t')[source]¶ Gets all of the groups and their descriptions, but not who is in them
-
elexio_api.wheatland.
get_users_in_group
(session_id, group_id, group_name=None, write=True, file_location='', delim='\t')[source]¶ Gets the users in one group
-
elexio_api.wheatland.
get_users_in_all_groups
(session_id, write=True, file_location='', filename='users_in_all_groups.xlsx', delim='\t')[source]¶ Gets the people every different group. Will take a while to request every group
-
elexio_api.wheatland.
get_user
(session_id, user_id)[source]¶ Gets all of the info on a single person. The family, group, and note data has to be parsed specially
-
elexio_api.wheatland.
get_all_users
(session_id, write=True, file_location='', filename='all_users_full.xlsx', delim='\t')[source]¶ Gets the full data on all of the users, one at a time
-
elexio_api.wheatland.
get_user_attendance
(session_id, uid, week_offset=0, number_of_weeks=50, write=True, file_location='', delim='\t')[source]¶ Gets a single user’s attendance.
-
elexio_api.wheatland.
get_all_attendance
(session_id, week_off=0, number_of_weeks=50, write=True, file_location='', filename='all_attendance.xlsx', delim='\t')[source]¶ Goes through every user and gets their attendence.
Parameters: - = offset back from current week. So 5 would start 5 weeks ago and (weeks_off) – work backwards from that
- = the number of events to count. Elexio default is 50. Entering a very (number_of_weeks) – large number will ensure that you get everything
-
elexio_api.wheatland.
update_all_users
(session_id, input_filepath=None, write=True, write_file_location='', write_filename='updated_all_users_full.xlsx')[source]¶ Compares the local users file to the current database online and updates local
input_filepath = full path to local excel file to run through


Ardrone Control EXAMPLE
Event
Connect
Ftrim
Quit
Pitch_plus
Roll_plus
Yaw_plus
Pitch_minus
Roll_minus
Yaw_minus
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If I'm not riding my bike around Melbourne then hopefully I'm overseas walking through towns I've never been to before and trying not to butcher the language. If I've got some downtime I'm trying to read the back log of books that I have.... faster than I am buying them.
We are the 4.0 grads of REA more commonly know as realestate.com.au. We are scattered throughout REA with the aim to soak the most amount of knowledge possible.
Data Science, Business Analysts, UX/Design and Developers are all the flavours that we come in.


Visitors who have come to spend time with us and survived :)
Norm Whittington, Lee Hearst
|
John, parking the boat July 2012 |
|
|
Lee and Edie March 2012 |
Terry, Mary, Clara, and Jacob April 2012 |
|
Glenn and Linda McConnell October 2011 |
Chaz and Dylan August 2011 |
|
John McCraw August 2011 |
Norm Whittington, Lee Hearst May 2010 |