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Deploy django channels app on Nginx with Daphne, Asgi and Supervisor

noreply@blogger.com (Hammad Hussain) — Wed, 02 Nov 2016 08:23:00 +0000

So finally you have successfully created a django app that is utilizing the new cutting-edge technology django channels. Before that absorbing the power of web sockets in django is somewhat a a bane in your life. But after the channels revelation, the bad days are no more.

Though channels are very major and wonderful addition in django family, But it still in initial phases so resources for it is also very few. But instead of all of these thing, if you got success in the integration of channels in your project, that's not a last job, you still need to serve your app across the internet so that your audience can see it.

In order to achieve this, your old friend WSGI wont works. Since channels required Asgi for its capability to serve over the internet. Again Since this is quite a new technology so there isn't enough resources that will guide you for this deployment at least at the time I am right this.

When I was deploying my django channel app, it almost took my good time because of this lackness of online resources and reviews. So I have decided to share my all the efforts in black and white for others, through which I have successfully made deployment on Nginx with Daphne and Asgi as well as involving supervisor with this.

If you are still not familiar with Daphne and Asgi, I recommend you to visit this wonderfully tutorial by Abu Ashraf Masnun, that will provide you good understanding of both of these channels backers.

Here I will also show you how you can use supervisor to automate server up down without your manual interference.

asgi.py

To run Daphne, it just needs to be supplied with a channel backend, in much the same way a WSGI server needs to be given an application. Create asgi.py file that looks like this in the same directory where there is wsgi.py:

import os 

from channels.asgi import get_channel_layer 




os.environ.setdefault("DJANGO_SETTINGS_MODULE", "your_project.settings") channel_layer = get_channel_layer()

Install Supervisor

Since we are using supervisor to automate our server process so, Install supervisor in your machine. In ubuntu for this I have done

apt-get install supervisor

After this we need to configure the supervisor for our program, you. I am keeping my program conf separated from the supervisor base configurations i.e used [include] to include external configurations, but you can also add directly to this file. Add the following lines in /etc/supervisor/supervisord.conf


; supervisor config file



[unix_http_server]

file=/var/run/supervisor.sock   ; (the path to the socket file)

chmod=0700                       ; sockef file mode (default 0700)

[supervisord]

logfile=/var/log/supervisor/supervisord.log ; (main log file;default $CWD/supervisord.log)

pidfile=/var/run/supervisord.pid ; (supervisord pidfile;default supervisord.pid)

childlogdir=/var/log/supervisor            ; ('AUTO' child log dir, default $TEMP)

; the below section must remain in the config file for RPC

; (supervisorctl/web interface) to work, additional interfaces may be

; added by defining them in separate rpcinterface: sections

[rpcinterface:supervisor]

supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface



[supervisorctl]

serverurl=unix:///var/run/supervisor.sock ; use a unix:// URL  for a unix socket

; The [include] section can just contain the "files" setting.  This

; setting can list multiple files (separated by whitespace or

; newlines).  It can also contain wildcards.  The filenames are

; interpreted as relative to this file.  Included files *cannot*

; include files themselves.

[include]

files = /etc/supervisor/conf.d/*.conf

stdout_logfile=/var/log/django-supervisor.log

stderr_logfile=/var/log/django-supervisor.log

And then create your configuration file program.conf in /etc/supervisor/conf.d/ as:


[program:server_workers]

command=/my_venvs/django-venv/bin/python /home/django/your_project/manage.py runworker

directory=/home/django/your_project/

stdout_logfile=/home/django/logs/gunicorn_supervisor.log            ; Where to write log messages

stderr_logfile=home/django/logs/gunicorn_supervisor.log

autostart=true

autorestart=true

redirect_stderr=true

stopasgroup=true



[program:server_interface]

command=/my_venvs/django-venv/bin/daphne -b 127.0.0.1 -p 8000 your_project.asgi:channel_layer

directory=/home/django/your_project/

stdout_logfile=/home/django/logs/daphne.log            ; Where to write log messages

stderr_logfile=home/django/logs/daphne.log

autostart=true

autorestart=true

stopasgroup=true

Make sure to replace python path, project path, daphne path, logs files path according to your project in this configurations.

Till now we have configured our supervisor script to run Daphne server and the workers that interact with Daphne server.

Nginx

The last step in our server deployment is to setup Nginx to divert all traffic to Daphne

Create confuration file of your site in /etc/nginx/sites-available/ and paste the following configurations: project.conf

# Enable upgrading of connection (and websocket proxying) depending on the
# presence of the upgrade field in the client request header
map $http_upgrade $connection_upgrade {
    default upgrade;
    ''      close;
}

# Create an upstream alias to where we've set daphne to bind to
upstream your_project {
server 127.0.0.1:8000;
}

server {
    listen 80;
    server_name YOUR_SERVER_IP;

    client_max_body_size 4G;

    access_log /home/django/logs/nginx-access.log;
    error_log /home/django/logs/nginx-error.log;


    location /static/ {
        root  /home/public_html;
    }

    location /media/ {
        alias   /home/public_html/media/;
    }

    location / {
        # an HTTP header important enough to have its own Wikipedia entry:
        #   http://en.wikipedia.org/wiki/X-Forwarded-For
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

        # enable this if and only if you use HTTPS, this helps Rack
        # set the proper protocol for doing redirects:
        # proxy_set_header X-Forwarded-Proto https;

        # pass the Host: header from the client right along so redirects
        # can be set properly within the Rack application
        proxy_set_header Host $http_host;

        # we don't want nginx trying to do something clever with
        # redirects, we set the Host: header above already.
        proxy_redirect off;

        # set "proxy_buffering off" *only* for Rainbows! when doing
        # Comet/long-poll stuff.  It's also safe to set if you're
        # using only serving fast clients with Unicorn + nginx.
        # Otherwise you _want_ nginx to buffer responses to slow
        # clients, really.
        # proxy_buffering off;

        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $connection_upgrade;

        # Try to serve static files from nginx, no point in making an
        # *application* server like Unicorn/Rainbows! serve static files.
        if (!-f $request_filename) {
            proxy_pass http://your_project;
            break;
        }
    }

    # Error pages
    error_page 500 502 503 504 /500.html;
    location = /500.html {
        root /home/public_html/static/;
    }
}

Again make sure to replace all the settings according to your understanding for example replace YOUR_SERVER_IP with the address of yours. Similarly replace static file paths as well as project names etc.

Now the final step is to create the symlink of your site configuration from sites-available to sites-enabled, here's how to do this in ubuntu:

cd sites-enabledsudo ln -s ../sites-available/project.conf .

That's it:

If everything goes fine as mentioned above, you will now be able to see your site in your browser. If this helps you don't forget to appreciate me via comments :)
Furthermore, if found anything wrong in this tutorial please help others by commenting it.
Thanks

Best way to create See Own Customers rule in Odoo

noreply@blogger.com (Hammad Hussain) — Wed, 26 Oct 2016 10:56:00 +0000

Odoo does not provide by default a rule to limit users to see their own customers, at least at the time when I am writing this article. So many people are asking the question in different odoo forums, how they can limit users to see their own customer similar to the See Own Leads group rules of the Sale.

For the answer of this question, many have suggested to create a record rule from Odoo Settings --> Technical --> Security --> Record Rules like ir.ui.view.custom object. Set the object as res.partner and Add related domain in Domain section as:

['|', ('user_id', '=', user.id), ('user_id', '=', False)]

like in the answers in this post and this and this

This is valid domain but I am not the one who suggest this domain on record rule for such use case, since the problem with this is that the res.partner object is not just for customers, its also has records for companies, users as well as suppliers. So what this domain does is it limit all that other records too. It is also possible that you will also got such access errors on different other objects as I got in sale module while approaching sale dashboard:

The requested operation cannot be completed due to security restrictions. Please contact your system administrator.
(Document type: res.users, Operation: read)

Hence we need a way to exclude all other than customer record from this domain.

This domain will I think is best suited if you want to limit just customers:

['|', '|', '|', ('user_id', '=', user.id), ('user_id', '=', False), ('create_uid', '=', user.id), ('customer','=',False)]

and to apply this via code :

<record model="ir.rule" id="custom_rule_see_own_customer">
<field name="name">custom.rule.see.own.customer</field>
  <field name="model_id" ref="base.model_res_partner"/>
  <field name="domain_force">ABOVE DOMAIN HERE</field>
  <field name="groups" eval="[(4,ref('base.group_sale_salesman'))]"/>
  <field name="perm_read" eval="True"/>

Hardware Approach vs API: Choosing the best and right SMS API gateway in Pakistan

noreply@blogger.com (Hammad Hussain) — Sun, 21 Aug 2016 15:11:00 +0000

Recently I got a chance to work in a project, in which there was a requirement to integrate the two way messaging mechanism in web system. So the very first thing that came to my mind was which sms messaging method to go for? There are the choices for hardware approach and the API approach. Hardware approach is that in which usually modems are used as a communication medium is very popular for many organisations that are been using this sms mechanism in their systems for now long time. There is a relative easiest way to achieved similar thing is using the cloud based API services. In this gateway providers rather than to setup hardware on client system provide cloud based APIs to be integrated with the clients systems. For me this API based approach is more suitable, so I opted it over hardware approach.

The second thing on which I have to made decision was, which SMS API gateway to choose? There are plenty of such gateway providers in the web, choosing your best and right option is really a hectic job, at least it was for me. I have different conditions from the customer of my system related to pricing, time, durable etc. , to whom I have to address. So I prepared a comparison table that helped to select my best and right SMS API gateway. The system on which I was working was for Pakistan so my primary concern of work is only for Pakistani audience, but you can also get good sort of knowledge for any region.

Solution/Platform	Coverage	Local Number	2 way	API	Ease of integration	pricing

Twilio	yes	no	yes	yes	yes	Low
Clickatell	yes	no	yes	yes	no	Average
plivo	*	no	yes	yes	yes	low
Sinch	*	no	yes	yes	yes	Average / very low ⁰¹
smsglobal	*	no	yes	yes	yes	Average ⁰¹
nexmo	-	no	yes	yes	yes	Average
Hardware Approach	yes	yes	yes	no	no	High

* Need Credentials to test / Not Free / Failed to test
⁰¹ Depending on the scale of use

How to reset all migrations in django > 1.7 in windows and linux?

noreply@blogger.com (Hammad Hussain) — Sat, 13 Aug 2016 16:04:00 +0000

Django has a awesome way to handle changes in the database, which help us to track the structure of the database and keep us safe from manual interactions with the database. Databases changes are mapped according to the model definitions. If you worked in other python frameworks like Odoo or web2py then you can definitely realize what a great thing it is. Here is how they are defining these migrations:

Migrations are Django’s way of propagating changes you make to your models (adding a field, deleting a model, etc.) into your database schema

But often times this facility becomes tension and we stuck in such a situation where it fails to caters our need and the only way we have is to reset all the migrations and start the migration from the initial. For such a situation in Windows and Linux these may can help you.

For Windows:

del project_dir/app_dir/migrations/*
echo.>project_dir/app_dir/migrations/__init__.py
python manage.py makemigrations
python manage.py migrate

For Linux :

$/home/project-dir@user: find . -path *migrations* -name "*.py" -not -path "*__init__*"
python manage.py makemigrations
python manage.py migrate

ref: http://stackoverflow.com/a/30016412/3832653

How to configure hierarchy Sales Team Structure in Odoo / OpenERP

noreply@blogger.com (Hammad Hussain) — Tue, 15 Sep 2015 19:44:00 +0000

Often times while following OpenERP/Odoo for sales management, it is our requirement to have a proper team hierarchy with the secure desired flow of information. For that Odoo provides us the ability to create our own sales teams with the desired access control for the flow of information in the team hierarchy. In this tutorial we will use use the default Odoo provided roles or group. For the one who wants to customize the access control as per his/her requirement, he/she have to create their own security rules etc.

One of major concerns for the Odoo users is to easily configure the sales team, since Odoo have the poorest documentation [as per the online sorcerers :) ]. So to configure your sales teams properly, likely this tutorial will helps you.

In this tutorial I am considering this sales team hierarchy:

Sales Manager (Team Leader)

Sales Person

Sales And Quotations

Setting proper sales team configurations can solve the mentioned problems.

Sales Teams can be configured by the following steps:

Create Sales Teams: Go to Sales Tab‣ Configuration ‣ Sales Teams. Give the newly created sales team some desired name like Team A.
Set Team Leader (Sale Manger) for Sales Team. From Sales ‣ Configuration ‣ Sales Team. Make sure that the Team Leader has proper access rights (instructions are given below for setting access rights.
Assigning Team members of that Sales team. Add some users as a team member to new sales team. Each user should have proper access rights. (Instructions are given below).
Set Sales Person and Sales Team on Quotations and Sales Orders. Now as our sales team is created, it’s time to associate some sales and quotation to our sales team. To do this one should set Sales Person and Sales Team while creating new Quotations and Sale order. Set Sales Team from the Other Information Tab.

How to set access rights For Team Leader & Sales Person:

To configure access rights: settings ‣users ‣ user ‣ access rights

For Team Leader set sales value to Manager
For Team Leader set sales value to See Own Leads

The Anatomy of Bika-LIMS

noreply@blogger.com (Hammad Hussain) — Tue, 15 Sep 2015 05:02:00 +0000

Python, Zope, CMF, Plone, Bika how does that all fit together?

Bika-LIMS Architecture:

The architecture of Bika-LIMS can be analyzed from this figure:

Figure 1 Bika-LIMS architecture

What is Zope:

Zope is one of the most scalable web application servers in the market.

Figure 2 The Zope Application Server

What is Plone?

Plone is a content management system (CMS) which you can use to build a web site. With Plone, ordinary people can contribute content to a web site without the help of a computer geek. Plone runs over the Web, too, so you don't need to install any special software on your computer. The word content is meant to be general, because you can publish so many types information,

Where Bika-LIMS stands?

Bika-LIMS is an add-ons built for the Plone framework. Or we can say that the Bika-LIMS is Plone site. That means in order to understand the Bika-LIMS, we must have to understand Plone framework.

Plone is all about Content and Theme:

Theming Plone:

Theming a Plone site has two major parts:

· Structural theming: the construction of the HTML skeleton of a page and getting the right content elements into the right spots. Also, the provision of the CSS and Javascript elements to finish the presentation and provide dynamic behaviors.

Templating, which itself has two aspects:

Viewlet templates, which we might think of as the micro formatting of the page. Remember when we looked at the viewlet map of a page? (Look again via @@manage-viewlets.) All those viewlets are provided via individual, editable templates.
Content type view templates, Whenever we create a new content type or modify an existing one, we’ll typically want to create or modify a view template.

Structural theming is best accomplished via the Diazo theme engine. Diazo provides a rule based mechanism for mapping content provided by Plone into one or more master page designs.

Templating is accomplished by editing page template files which allow us to mix object content from the ZODB with HTML. Plone uses its own (actually Zope’s) Template Attribute Language (TAL) for this purpose.

Content-types in Plone:

A content type is a variety of object that can store information and is editable by users. We have different content types to reflect the different kinds of information about which we need to collect and display information. Pages, folders, events, news items, files (binary) and images are all content types.

There are two content-frameworks in Plone: Archetypes and Dexterity. Dexterity is the new way to create content types and is default in Plone 5. And Archetype is the default way to create content types in Plone 4.

Since the scope of this document is to understand the Bika-LIMS and the Bika-LIMS is based on Plone 4. So we will just understand the archetype framework here. The comparation between the two frameworks can be seen from http://plone-training.readthedocs.org/en/latest/dexterity.html#dexterity-and-archetypes-a-comparison

The makings of a Plone content type:

Every Plone content type has the following parts:

Schema: A definition of fields that comprise a content type; properties of an object.
FTI: The “Factory Type Information” configures the content type in Plone, assigns it a name, an icon, additional features and possible views to it.
Views: A view is a representation of the object and the content of its fields that may be rendered in response to a request. You may have one or more views for an object. Some may be visual — intended for display as web pages — others may be intended to satisfy AJAX requests and be in formats like JSON or XML.

Archetypes Content-types:

Archetype is a framework designed to facilitate the building of applications for Plone and CMF. Its main purpose is to provide a common method for building content objects, based on schema definitions.

o Schema in Archetypes: Schema only in Python
o Archetypes: Permissions per field hard, custom forms even harder.
o If you have to program for old sites you need to know Archetypes!

To learn more about Archetypes visit https://plone.org/products/archetypes/documentation/old/ArchetypesDeveloperGuide/index_html

Major Archetypes present in Bika-LIMS can be seen from the project database ERD:

References:
http://www.bikalabs.com/softwarecenter/bika
http://www.bikalabs.org/
https://plone.org/
http://www.zope.org/

Free Microsoft 70-480 Test Samples : Programming in HTML/CSS/JS

noreply@blogger.com (Hammad Hussain) — Fri, 08 Mar 2013 06:30:00 +0000

Microsoft 70-480 Tests

Exam: Programming in HTML 5 with JavaScript and CSS3:

Last week I got the chance to appear in Microsoft's 70-480 test, Programming in HTML 5 with JavaScript and CSS3. I had only the little bit knowledge or hands on HTML 5 with JavaScript and CSS3. I was thinking that that test was not a big deal for me because I am the programmer in several tough and big languages (C, C# etc) which helps me for that test, so keeping that in my mind I did not practice and even I did not opened any book to learn something for my upcoming test. One day ago from my test I fell that I should see the samples from the web, so it would help me in knowing the pattern and types of question appearing in test. I opened some sites and view some sample tests from different sources. Next day I appeared in test and I was totally amazed to know that the pattern and type of questions was same as that been mentioned in the samples that I had downloaded the day ago. I fell very sad and guilty to not to taken serious those samples papers. And it is also interesting that few of the questions from the sample paper were also mentioned exactly same as in the real Microsoft's test, that I took. And lastly, as possible I did not able to get success in that test. But I advice you guys to study well enough for these tests because It was really not a child's task for whom who had not learned the HTML 5/ CSS3/JS from any good institute like me. Or if it is not possible to you, you should make sure to practice or keep mind on these sample tests perfectly. So I will helpful to you to getting you certificate to you.

Here are these sample tests that I think are useful to you before appearing in test.
Note: To run these .vce extension tests files you need Visual CertExam Suite.
click here to download it. or visit their website.

If you find broken links or corrupted files, please report to me. Thanks!

Microsoft BeItcertified 70-480 v2013-02-14
3.71 MB
Microsoft ExamCollection 70-480 v2013-02-04

4.54 MB

Microsoft Testinexam 70-480 v2013-01-03
4.52 MB

Microsoft BrainDump 70-480 v2013-01-12
5.67 MB
Microsoft BrainDump 70-480 v2013-01-09
5.58 MB
Microsoft BrainDump 70-480 v2012-12-29

99.57 KB
Microsoft BrainDump 70-480 v2012-12-26

4.52 MB
Microsoft BrainDump 70-480 v2012-12-26
5.52 MB
Microsoft BrainDump 70-480 v2012-12-25
5.59 MB

Microsoft BrainDump 70-480 v2012-11-11
598.29 KB

Microsoft ActualTests 70-480 v2012-12-17
3.88 MB
Microsoft ActualTest 70-480 v70-480
4.61 MB
Microsoft ActualTest 70-480 v2012-12-04
3.69 MB
Microsoft ActualTest 70-480 v2012-12-04
3.73 MB
Microsoft ActualTests 70-480 v2012-11-25
3.73 MB

Microsoft ActualTests 70-480 v2012-09-08
1.74 MB

Microsoft Test4Prep 70-480 v2012-11-24
4.55 MB
Microsoft Test4Prep 70-480 v2012-11-14

4.55 MB

Microsoft Test4Prep 70-480 v2012-11-12
4.55 MB
Microsoft ExamCertify 70-480 v2012-09-08 2

1.74 MB

Free Dev c++ for download

noreply@blogger.com (Hammad Hussain) — Wed, 06 Mar 2013 09:03:00 +0000

Dev-C++ is a free integrated development environment (IDE) distributed under the GNU General Public License for programming in C and C++. MinGW, a free compiler, is bundled with it. The IDE is written in Delphi.

The project is hosted by SourceForge. Dev-C++ was originally developed by programmer Colin Laplace. Dev-C++ runs exclusively on Microsoft Windows.

Bloodshed Dev-C++ is a full-featured Integrated Development Environment (IDE) for the C and C++ programming languages. It uses the MinGW or TDM-GCC 64bit port of the GCC as its compiler. Dev-C++ can also be used in combination with Cygwin or any other GCC-based compiler.^[1]

One additional aspect of Dev-C++ is its use of DevPaks, packaged extensions on the programming environment with additional libraries, templates, and utilities. DevPaks often contain, but are not limited to, GUI utilities, including popular toolkits such as GTK+, wxWidgets, and FLTK. Other DevPaks include libraries for more advanced function use.

Dev-C++ is generally considered a Windows-only program, but there are attempts to create a Linux version: header files and path delimiters are switchable between platforms. More work needs to be done though.

souce: http://en.wikipedia.org/wiki/Dev-C%2B%2B

Click here to download!

Urdu++ v1.0 - Urdu Text Editor

noreply@blogger.com (Hammad Hussain) — Sat, 12 Jan 2013 09:25:00 +0000

Urdu++ v1.0 is one of the Projects developed by first year students of Software Engineering at Department of Computer Science (UBIT), University of Karachi

Urdu++ is a text editor designed for Windows and have an On-Screen Keyboard too for Urdu typing & as it is based on Unicodes there is no need to install any Urdu Fonts to generate Text files having Urdu text.

As it is the very first version, Urdu++ is a bit basic program but its features will be upgraded later in its next version.

Development Team:

Hammad Hussain Qureshi

Abdul Bari

Hunain Manzoor

Muhammad Hasan Sarosh

www.fb.com/ubitstudents

The Urdu++ will available for Download Soon!

Study- Six Top demanded IT fields

noreply@blogger.com (Hammad Hussain) — Wed, 26 Dec 2012 07:25:00 +0000

With the economy in upheaval, here are some IT fields that probably polish new upcoming student's career:

If you want to stay employed in IT amid the economic uncertainty, look for jobs in software design and development, networking and systems administration, software implementation analysis, testing and quality assurance, database administration and general IT management with cutting-edge mobile IT and Web 2.0 skills.

These above mentioned IT field are the top demanded IT job fields today, according to a new report on the "Top 20 Most Recession-Proof Professions," recently released by McLean, Va.-based online job placement firm JobFox.com.

The top recession-proof professions, according to the list, based on JobFox's analysis of monthly rankings since last November are sales representatives/business development, software design and development, nursing, accounting and finance executives, and accounting staff.

Among the jobs on the top 20 list of recession-proof professions are six in IT fields.

"That general category of IT popped through as the biggest winner" at this time, said Barry Lawrence, a JobFox.com spokesman. "We know our recruiters are dying to get people with those skills. Everybody is trying to improve the ways they do business, to streamline in a tough economy," so companies are seeking workers with these qualifications.

JobFox.com compiled the study from online job listings that are placed by employers. JobFox.com then takes detailed resumes and employment profiles from prospective job candidates and matches them up to the job listings, Lawrence said.

"Think eHarmony.com for jobs," he quipped, referring to the online dating service that conducts online profile interviews of each applicant and then matches them up to potential dates by comparing their responses.

Other online job posting boards, such as Monster.com and CareerBuilder.com, post ads that users can search using keywords, but JobFox uses a database to query and match applicants to jobs, Lawrence said.

The company was founded by Rob McGovern, who founded CareerBuilder.com before selling it in 2002. In 2004, he began a new online employment company, Market10.com, in the Washington area. Last year, he changed the name to JobFox.com and went national. The site tracks jobs in about 170 professions and includes job postings for about 1,700 employers across the nation. Fees for the services are paid for by the employers, not by the job candidates.

The recession-proof job rankings are an outgrowth of the company's regular monthly "JobFox Top 25 Most Wanted U.S. Job Candidates" listings, Lawrence said. The top 25 lists have been done for the last five months, using data on job listings since last November. "We don't pretend that this is scientifically perfect, but we think it gives you a nice snapshot," he said.

In July's monthly rankings of most wanted job candidates, the hottest IT jobs are:

Software design/development (No. 4)
Networking/systems administration (No. 10)
Database administration (No. 18)
Software implementation analyst (No. 19)
Testing/quality assurance (No. 20).

JobFox.com compares report data with findings from other employment research businesses and government data from the U.S. Department of Labor, Lawrence said. "I feel very good about what we're reporting in the Top 20. The numbers are there."

Paul Holley, a spokesman for employment services company Manpower Inc.in Milwaukee, said in an e-mail that his company conducts similar research, but that it can't be compared directly because the methodologies used are different. What is comparable, Holley said, is that data from the "Manpower 10 Hardest Jobs to Fill" survey contains several jobs also found in the JobFox.com listings, including engineers, sales representatives, IT and accounting/finance.

"One thing that we have noted about the Top 10 list at Manpower is that many of the positions (i.e., skilled manual trades, sales representative, mechanic) require a personal touch -- direct contact or service -- and therefore are difficult to offshore," Holley said.

John Challenger, president of Chicago-based outplacement consulting firm Challenger, Gray & Christmas Inc., said the JobFox.com studies "hit a number of jobs that will be in strong demand. ... They are all core functions that most companies need."

Source: http://www.computerworld.com/s/article/9110173/Study_Six_IT_fields_in_top_20_recession_proof_professions

Career Focus: Software Engineering

noreply@blogger.com (Hammad Hussain) — Mon, 24 Dec 2012 06:47:00 +0000

Career Focus: Software Engineering

BY JOHN R. PLATT

A few weeks ago, the IBM-built supercomputer named Watson made worldwide headlines by beating several human contestants on the game show, Jeopardy!. It's a feat that would not have been possible without the software engineers behind the scenes. [Editor's Note: On Monday, 28 February, physicist and Congressman Rush Holt (D-N.J.) saved face for humans by topping Watson in the first of three rounds of an exhibition Jeopardy! match.]

"Software engineering is one of the fastest growing fields in the world today," says Ben Amaba, worldwide executive for IBM Complex Systems. "What we're seeing across all other disciplines is that software is becoming an invisible thread tying all disciplines together. Software is now embedded in almost all devices, mechanical devices all talk with each other, and developing products using software is faster and poses fewer risks than physical prototyping."

CAREER PROFILES

Sandra Robinson

Occupation:	Software Engineer
Experience:	30+ years
Employer:	Lockheed Martin
+ See Sandra's full profile

Phillip LaPlante, PE

Occupation:	Professor of Software Engineering
Experience:	28 years
Employer:	Penn State University
+ See Phillip's full profile

Why Software Engineering is Important

Software engineering was recently dubbed the best job of 2011 by career site Career Cast, and magazines like Forbes and Fortune have also extolled the virtues and importance of the field. Heck, even toy company Mattel recently introduced Computer Engineer Barbie to help inspire young girls into the profession.

So why are these employees so valuable? Look no further than the often-cited Standish Group "Chaos" reports, which most recently (2009) found that only 32% of software projects are, in their terms, "successful." The Standish report found that 44% of software projects were "challenged," usually involving cost over-runs and late delivery, and a full 24% of projects failed. Since companies often can't afford these costly delays or failures, engineers who operate by a set of standard development principles, such as those defined in the Software Engineering Body of Knowledge (SWEBOK), can help keep costs down and products flowing out the door.

"Software engineers can also have higher innovation rates," says Amaba, "because they aren't tied to the physical world. Their only constraint is time. Other areas are more limited by materials and manpower."

The Field

According to the Bureau of Labor Statistics (BLS), the number of employed software engineers has grown more than 25 percent in the past decade, from 745,000 in 2001 to 1,206,000 in 2010. The earning potential for software engineers is also strong, with both computer systems and applications software engineers averaging more than $90,000 in annual wages in 2009, according to BLS data (see table below). Among all other engineering fields, only chemical engineers averaged higher annual wages in 2009 at just over $96,000.

Source: US Department of Labor/Bureau of Labor Statistics (Occupational Employment Surveys)

That doesn't mean there are jobs for everybody, but the prospects are good for software engineers, and they have one of the lowest levels of joblessness among engineering professions. According to the BLS, software engineering unemployment was 4.6% in 2010, compared to 5.4% for electrical engineers.

Chris Ruoff, Sr. Manager of Sales and Channel Development for the IEEE Computer Society points out that professional certifications, like the IEEE Computer Society's Certified Software Development Associate and Certified Software Development Professional, are now becoming recommended or even required by companies seeking to hire software engineers. "More and more organizations are recognizing the benefit of hiring someone who has a solid foundation in software engineering and provides a lower risk as a new hire." The SWEBOK Guide is used world-wide in academia and in industry and provides a great resource to build this foundation.

What Employers are Looking For

"Software engineers need good communication skills, both spoken and written," says Amaba. "They need an analytical capability, and they need to be able to manage a project from end to end while working well with their colleagues." He says employees also need to be able to keep up with rapidly changing technologies. "Also, the more they know about the social sciences, physical sciences and mathematical sciences, the better they will be able to succeed."

"As a hiring manager, I'm looking for candidates to show me two things: that they are smart and can get things done," says Jensen Crawford, director of engineering for Fetch Technologies. "The former includes being able to communicate about, analyze and solve problems. The latter is being able to deliver those solutions." If you're looking for experience, Crawford recommends a few steps, especially for anyone who is still in school: "Contribute to open source projects, work as an intern, and enter programming contests," he says. "Having proof that you delivered software will give you a real advantage over other candidates."

Software engineering will be of great need in a number of fields in the coming years, says Bruce Douglas, chief evangelist for IBM Rational. A few examples include probability and statistics, environmental engineering, economics, ethics, and electric vehicle mechanics. "Software engineers with knowledge and fundamentals on electric vehicles will be in better position to create complex battery systems, electric drive units and cabin electronics," he says.

"What we have found is you need product-oriented people," says Arvind Srinivasan, chief technology officer and co-founder of ZL Technologies. "They need to be able to work on a project from A to Z and solve problems at every level, not just be able to write code. We hire people with a mathematical background and a strong engineering sense." Srinivasan says one of the main things he wants to see from a job candidate is if they have already shipped a product. "If not, it doesn't matter how well you write code."

A software engineer is the best support engineer, says Srinivasan. "They can support what they write, find a problem and fix it. They have a good sense of what the customer is thinking and can respond to customer requirements. They also understand the quality assurance process and make sure that products are of high value."

All of the people I spoke with this article discussed how important software engineering is not just for today, but for the future. "Software engineering is going to change the world," says Amaba. "It's becoming embedded in the devices we all use every day." Srinivasan agrees: "Software engineering is the nuts and bolts for the entire future. You need software for everything these days. It's deeper than deep. I think it's going to become the new English."

IEEE Software Engineering Resources

Don't miss the recent Today's Engineer article, "IEEE-USA and IEEE Computer Society Cooperate in New Professional Software Engineering Licensure Initiative."

You can find information on the IEEE Computer Society's certification programs here.

The Guide to the Software Engineering Body of Knowledge (SWEBOK) is available here.

Source: http://www.todaysengineer.org/2011/Mar/career-focus.asp

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Perception of university students about annual system and semester system

noreply@blogger.com (Hammad Hussain) — Thu, 20 Dec 2012 14:17:00 +0000

Introduction:

Academic concerns have now become an extensive debate for understanding the concept of enhanced academic quality. Educators and higher authorities are always trying to devise new ideas and explore several options for making education as effective as possible in terms of outcomes. Outcomes in an academic set up means achievement of overall excellence in terms of results.
This research is an analysis of the focus group discussion that we conducted in University of Gujrat. This research aims to investigate and present a comparative analysis of annual and semester system which one is the best one.
In order to compare the semester and annual system the researcher has taken into account the qualities, advantages and disadvantages of both the systems. Annual system has been a successful system for our education in the past. However there were many loopholes in the system. This research talks about the possibilities of comparing the two systems as well as finding out which one is better to ensure quality for the students.

Review of the Literature:
Rana Muhammad Dilshad in 2004 on Students' Perceptions about the Quality of Semester System and Annual System. Researcher use multi stage ram dam sampling. The study concludes that semester system is better as compare to annual system.
Tayyaba Malik & Tahira Khanam in 2010 on Comparative analysis of MA English Results under Annual and Semester system: Quality Assurance in Pakistan. Researcher use Focus group discussion. The study concludes that the students from semester system have good results as compare to annual system.
Methodology:
Sample:
Our topic is perception of the university students about annual system and semester system. First of all we took appointment from the students of different departments and from the different age groups. As we want take the perception of the university students about the system of examination. So we conduct a focus group discussion to take the perception of the university students.
Instruments:
We used tape recorder and writing materials to pinpoint their discussion. After that we coded their arguments and then analyzed them.
Procedure:
In order to take the perception of the students we developed themes of the topic and after that we conducted a focus group discussion according to those themes. Our focus group was comprises on 9 members. We were 5 group members. One of us adopted the role of moderator, one of us was taping the discussion, and two were writing the discussion and was taking their snaps. After collecting the information we pinpoint them and analyzed.
Findings:
According to our themes the major findings of the study are;
Confidence Level:
We started our focus group discussion with confidence level. When we asked them about the of confidence level, 5 from the 9 respondents replied that semester system provide a lot of confidence. As one respondent asked that;
"When I got admission in the university, I was unable to speak with strangers but now I don't hesitate."
So from their discussion it is clear that semester system is more reliable in the increasing the confidence of the students as compare to the annual system.
Communications Skills:
Communications skill is an art. Without getting proficiency on communication, nobody can convey his message. In this way communication skill is very necessary for surviving the society. So, when we asked them about the improvement in the communications skills in the annual and semester system. 6 respondents were in the favor of semester system. They argued that;
"The semester system presentations processes improve their communication skills".
So the findings suggest that semester system is very convenient method for improving the communication skills of the students as compare to the annual system.
Relationship with Teachers:
Teachers and students relation have also an important role the learning of the students. On asking about the students and teachers relations, 8 respondents were in the favor semester system, they argued that;
"In the semester system teachers and students have very close relationship because teachers have to provide material for the study, in these way students and teachers have very close ties among them".
So it is clear from the findings that semester system is very beneficial for creating a strong relationship among teachers and students.
Learning Chances:
When we asked from our respondents about the learning chances in the both systems, 7 respondents were in the favor of semester system. They argued that;
"In the semester system the different parts of examination (assignments, presentations, quizzes and midterm) provide more chances for the learning".
Findings suggest that semester system provides more chances of learning as compare to the annual system.

Favoritism:
On asking about the favoritism in the examination 7 respondents were in the favor of semester system, they argued that;
"In the semester teachers room interaction count very much".
So in this way we can conclude that most respondents were in the favor of annual system as compare to the semester system.

Sr.#	Themes	Annual System	Semester system	Total
1	Confidence Level	04	05	09
2	Communications Skills	03	06	09
3	Relationship with Teachers	01	08	09
4	Learning Chances	02	07	09
5	Favoritism	07	02	09

Summary:
Both the education systems, i.e., semester and annual have their weak and strong presentation skills. However the annual system gives an opportunity to develop through concepts and in depth study of texts. In this system students get ample time to mastery over the subjects. Smooth running of the semester system means being careful about timelines and constraints of concepts that can be comprehended in a concise manner. It trains the students through a process of analysis, synthesis and evaluation. For cognitive learning semester system moves to the higher level of learning and student is evaluated on both intellectual and behavioral grounds. Check and balance system can facilitate the learners with the full benefit of the system. Teacher training can help both the semester and annual systems to assure quality.
In this study we conclude that 55.55% respondent in the favored that semester system increase their confidence level and 44.45% were disagree with this argument and 66.66% respondent is in the favor that semester system increase their communication skills, while 88.88 % respondents were stressed that semester system increase the relationship between teachers and students. 77.77% respondents have believed that semester system increase their learning process, while only 22.23 % respondents argue that semester system grading based on favoritism.

Source: http://www.ilmkidunya.com/student_articles/perception-of-university-students-about-annual-system-and-semester-system-1416.aspx

How to Be a Career Online Writer

noreply@blogger.com (Hammad Hussain) — Tue, 18 Dec 2012 06:58:00 +0000

By Jacob Malewitz

Online writing is a growing field. It seems every month there is a new place to publish articles-and for profit. I have made more money writing online articles than doing anything else-even my newspaper work. If you are ready to begin a new career, let this piece guide you.

Understand the Basics:
In short, people like reading short, to the point articles online. This isn't new, nor will it change for a while. Every week more newspapers and magazines begin publishing online. However, there are some basics to know. You will need to know what a keyword is, for example, and how many words the typical online piece has. Keywords are how search engines find your articles. And the typical online piece is 400-600 words, rarely pushing 1,000.

Remember: the more you understand the more you will make.

Set a Writing Schedule:
Treat internet writing like a business. This career can lead to much profit, and all from your words. The only way to profit, in my mind, is to have a regimen of writing almost every day. In the beginning, you may want to write every day. You can keep it at five days a week later. This means developing a set routine of working when you can. If you have the ability to work from home, you will often succeed in setting this schedule. If you don't, it's still more than doable. A good method is to start small: write 4-5 hours a day, early in the morning or at night, finding the time to make this a career.

Publish Often:
The only way to profit from your words is to publish as much as possible. Some sites will pay you a few dollars for your piece, while others will pay you hundreds. What matters is, either way, you need to stay focused on publishing articles. The more articles you publish, the more your checking account will rise.

So you will need to apply the second step here too. Publishing often means having a schedule for writing, editing, and publishing. The more quality articles you publish, the better said savings balance will be.

Running out of Ideas...
When you run out of ideas, it's time to start rethinking your goals. Goals are important to internet writers too. Many times, when you run out of ideas, you can look to the past articles you published. Often there will be a small gold stone in their: the idea which could be another article or more. You might try writing for a different site too. Different sites allow you to write similar articles in a different vein.

For example, you can turn one article into three, if you really try. A movie review could turn into an actor biography, then the biography could turn into an article on action films. One keyword is switched, the theme of the article changes, and you have a new title. This helps when you run out of ideas-or stops it from happening in the first place. That's a new online article.

Search for new Sites Monthly:
You should be writing for more than one site in the beginning. Perhaps when you are more financially stable you can afford to focus on one site. Right now, keep searching for new internet sites. This doesn't have to be all content sites, where you publish freely for set rates; there are many popular online magazines accepting articles every day. Your job is to find these. Again, use a schedule. Work once a week on finding new internet publishing avenues.

Enjoy the Ride:
This will be fun for you, in the end, even if all doesn't go well. Internet writing will keep growing as long as new, ambitious companies want to tap the power of the internet. A good method for having fun is to use your internet income to reward yourself. You can buy a new book or film, for example, or just take the family out to a restaurant. You will, at some point, realize your writing can be a career.

By profiting from writing, you will learn that if you improve as you go along, you have a good chance of being a top internet writer. And that this can be a career.

Tip
Focus on a few topics in the beginning, and then expand when you start running out of ideas.
One online, non-content site is Salon.com. This site publishes all kinds of pieces. They pay more than most, but there is stiff competition.

Warning:
Don't write for sites that only pay you per page views-at least exclusively. Page views are how many hits your article gets and how many ads are clicked on. This does turn into income over time. Some of these sites are better than others. Helium, in my experience, is one that rarely pays writers well. If they don't offer an upfront payment, look elsewhere, as some sites offer both upfront payments and page view bonuses.

Article Source: http://EzineArticles.com/?expert=Jacob_Malewitz

9 Steps for Managing Small Business IT

noreply@blogger.com (Hammad Hussain) — Tue, 18 Dec 2012 06:47:00 +0000

By Tom Ledford

Information Technology has never been more affordable. Small businesses can now take advantage of technology that will help them level the playing field and compete with larger companies, even on a global scale. Yet, the costs for small businesses that compete with you have come down too. How do you use IT to gain a competitive advantage?

Business leads - IT follows

1. Use IT to provide value to your customers

If IT doesn't add value for your customers, what's the point? Technology should allow you to either, lower costs, provide better customer service, or develop new products and services your customers need. If deploying new technology doesn't do one of these, don't bother.

2. Don't buy more complexity than you need.

Efficiency is found in simplicity - fewer moving parts. Don't buy feature laden software if simple software gets the job done. However, you should take care to analyze and anticipate your needs so you don't under buy. A good tactic is to plan for a progression of features or capabilities that match your expected growth. Choose software that is easily upgraded and allows you to use your existing data with new versions or modules.

3. Apply technology only if it improves a process

A manual process is often the most efficient. Don't spend 200 man hours implementing a technology that will save you 8 man hours a month. Any technology should also add customer value over and above the manual process.

4. Monitor capacity, performance and health

Don't just set it and forget it. There are too many inexpensive management tools that will allow you to monitor your systems and alert you in time to avert a disruption of service. Something as simple as running out of disk space can cause a service outage that takes days to recover from.

5. Be proactive instead of reactive

Monitoring your systems also allows you to collect data that can be used for trend analysis. For example: By knowing the rate of increase in your disk space usage you can predict when you will need to add capacity and plan accordingly.

Replace your equipment before it wears out or becomes unreliable. Practice "life cycle management." Budget for computer replacement every 3 to 5 years. For example: if you have 40 computers, consider budgeting to replace 10 of them each year.

6. Plan for contingency

Hardware fails. Users screw up. Viruses are always a threat. It's prudent and cost effective to use redundant disk technology on your server, but you don't have to go crazy trying to build fault tolerance into all your systems. If you have 20 computers, having a spare ready to go only costs you an additional 5%. That's a very cost effective way to increase availability. I've worked with large companies that will spend days trying to source parts and repair a computer while the user cannot work.

7. Provide operational structure

Define the processes you will use to manage your information technology just as you would any other business process. Use a regimented approach to performing the tasks needed to complete the processes. For example: backing up your data requires a number of specific steps. Write them down, perform them at the same time every day, and train more than one person to do them. Plan how you will update software and apply patches. Create processes, document them and develop a routine.

8. Train users

Your users don't need to know how to use every little bell and whistle. If they help them do their job faster, they'll learn them. Train them how to use their hardware and software to complete the business processes they are responsible for first. Teach them about Internet safety and help them organize their files and data.

9. Hire professionals to do the technical stuff

Find competent and reliable professionals to help you plan and maintain your systems. A good professional will want to understand your business, your customers, and your plans for the future. Once you have a good technology partner, you can focus on your business and customers.

Simplify

Information technology supports your efforts best when it is reliable, predictable and efficient. The best way to improve all three is to simplify.

For more about Tom Ledford:
Tom Ledford, Owner
South Side Tech
http://www.southsidetech.com
3849 Wyndsong Trl
Lexington, KY 40514
859-577-2403
Blog: The Practical Computer - http://praccomp.southsidetech.com
Twitter: @tcledford

Article Source: http://EzineArticles.com/?expert=Tom_Ledford

Free Vector Analysis* By Murray R. Spiegel* Schaum's Outlines

noreply@blogger.com (Hammad Hussain) — Sat, 08 Dec 2012 06:32:00 +0000

Free Vector Analysis* By Murray R. Spiegel* Schaum's Outlines* For Students

Students, Vector Analysis which had its beginnings in the middle of the 19th century, has in recent years become an essential part of the mathematical background required of Engineers, Physicists, Mathematicians and other scientists.

This book is designed to be used either as textbook for a formal course of students in vector analysis or as a very useful supplement to all current standards text. Each chapter in this book is provided with well defined explanations as well as solved examples and supplementary questions. Each question is presented with its answers at the end. This should very helpful for every student.

To me as a student, this book was really excellent and informative. Now its your turn to judge it, So here's the free download for you. . . . . and ya don't forget to comment . . . . . .

First skip the ad, then it will start the download.

Search/Social Marketing Service Request Confirmation

noreply@blogger.com (Hammad Hussain) — Thu, 29 Nov 2012 07:33:00 +0000

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Free Download Military Inc. by Ayesha Siddiqa

noreply@blogger.com (Hammad Hussain) — Wed, 28 Nov 2012 13:58:00 +0000

Military Inc. By Ayesha Siddiqa:

Ayesha Siddiqa (b. April 7, 1966) is a civilian military analyst and political commentator from Pakistan. She is also a regular op-ed contributor to Dawn News Papers, and before that to Daily Times. She currently writes for Express Tribune where her column appears every Friday. She previously served as professor of Military Science at the Johns Hopkins University.

This book Military Inc. includes the information and fact about the Pakistan Military Economics. This book also includes the history of the Evolution of Pakistan Military.

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Topics Of Object Oriented Concept UBIT DCS

noreply@blogger.com (Hammad Hussain) — Tue, 27 Nov 2012 06:23:00 +0000

Topics Of Object Oriented Concept (Sec A Batch 2012) by Hammad Hussain Qureshi:

How to Download :

Click the link below.
It will direct you to an ad, press skip at the top of the ad page.
That's all the file will start download for you.

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Download Beginners Visual Csharp 2010 free

noreply@blogger.com (Hammad Hussain) — Tue, 31 Jul 2012 07:32:00 +0000

Free Download Beginning Visual C# 2010, Karli Watson, Christian Nagel, Jacob Hammer Pedersen, Jon D. Reid, Morgan Skinner by uok-ubit.blogspot.com

Cell Phone charged by Coke or Pepsi.

noreply@blogger.com (Hammad Hussain) — Sat, 21 Jul 2012 13:54:00 +0000

Cell Phone charged by Coke or Pepsi.

The modern world is depends on high technologies, The high technologies means combinations, set of concepts. and this news is about a Chinese designer Daizi Zheng came up with the idea of a cell phone powered by sustainable energy sources. She designed a battery that uses enzymes generate electricity from carbs. That way she can use sugary drinks like Coke or Pepsi to charge the battery. Better still, the by-products of the charging process are just water and oxygen! and this is designed for the Finnish brand Nokia, the Eco-Friendly cellphone runs on an innovative battery.

source:http://www.designbuzz.com/entry/coke-powered-nokia-cellphone-concept-by-daizi-zheng/

The Youngest CEO from India.

noreply@blogger.com (Hammad Hussain) — Sat, 21 Jul 2012 13:46:00 +0000

The Youngest CEO from India.

Shravan (10 years, sixth Grade) and Sanjay Kumaran (12 years, eighth grade), two brothers from Chennai have created mobile phone applications that have witnessed over 10,000 downloads across the world already.
These brothers Shravan and Sanjay Kumaran have not yet completed school but they are already co-founders and President (Shravan)/CEO (Sanjay) of GoDimensions, a mobile applications firm.

Mobile Platforms comparison

noreply@blogger.com (Hammad Hussain) — Tue, 19 Jun 2012 17:54:00 +0000

The last year has seen some big movers and changes in the UK mobile platform market with more and more consumers adopting smartphone platforms such as Apple iOS and Google Android, with resulting increases in mobile spending, especially on applications.

According to research by MediaCells (via Guardian), a research and insight company based in London, big changes took place in the UK mobile market during 2010, and continuing into 2011 as well. Their forecast for 2011 shows that the amount of so called feature phones will reduce heavily while we will see continued growth in smartphone penetration, where especially Blackberry (RIM), Android, and Apple iOS is standing to gain from the consumer change over to more advanced mobile solutions.
In fact, this 2011 forecast might prove to be on the cautious side, as new figures from Kantar World Panel indicates that Android is now leading the UK smartphone market with a 37% marketshare compared to Apple’s iOS with 22% and RIM with 23%, with especially Android and Apple taking marketshare from Nokia and their Symbian platform (in the process of changing to Windows). Their research also shows that over 70% of new customers coming to Apple iOS and Android are coming from non-smartphone platforms (feature phones).
Although i guess no one will really be surprised by these figures, considering the popularity of the top 3 smartphone platforms and the constant innovation and new product releases taking place. Looking at mobile phone promotions in the UK market these days, it is all about smartphones and what opportunities they open in terms of staying connected to social networks, applications, and games.
But is the increase in smartphone penetration and an increasing amount of time spent online and consuming media over mobile solutions making people spend more of their expendable income on their mobiles?
A recent Ofcom study into how we consumer media and communications confirm the changes in terms of the impact smartphones have had on media consumption and time spent on a mobile phone, but it is also showing that we are actually spending less of our expendable income on media these days compared to earlier. This does however cover off all media, including televisions, internet etc. and does not looks at mobile phone expenditure alone.
A recent report by research2guidance shows that UK smartphone owners spent over £280m on mobile apps in 2010 as the ‘app economy’ exploded on a global scale. This figure is expected to increase further as the app market matures and people start becoming more focused in how they use apps in their daily lives, and the smartphone and tablet market penetration increases.

Mobile Internet Devices (MIDs) , Netbooks, Internet Tablets, Smart phones and Ultra-Mobile PCs (UMPCs) maybe just buzzwords today, but they are without doubt the devices of the future. In a nutshell, these are portable, small form-factor devices capable of browsing the Internet and having their own set of applications which can be executed in limited memory and processing power.
Traditionally OSes like Windows CE and Symbian’s S60 were the popular smart-phone OSes a few years ago. Today Linux as an embedded or a Netbook OS takes the top slot.
As a result of this a number of SIGs (Special Interest Groups) were formed by bigger companies who decided to start investing seriously in Open Source Mobile platforms.

The following are few of them which are not only popular, but are also backed by big companies in terms of resources as well as funds.

Android : With HTC Touch and HTC Hero being a huge success, the Google-promoted mobile stack Android, is touted as something to look forward to. With a Java-like programming interface, the Android SDK is easy to install and start developing apps on. Android Apps for these smart phones are increasing in number and soon can be a serious contender for the iPhone App Store.
Maemo : Nokia’s 770 Internet Tablet was one of the first commercially available MID running Linux. The Nokia N10 is the latest offering from Nokia running on the Maemo platform. Although Maemo does have VoIP apps, it is primarily being designed for Internet Tablets rather than Smart phones.
Moblin : Molin, asuumably short for Mobile Linux, was an initiative from Intel. After the release of their Atom family of processors, Moblin recieved further push from Intel in engaging the community. Moblin, like Maemo, is primarily targetted towards Netbooks, MIDs and Internet Tablets. It utilizes some of the modern embedded linux components like the Gnome-based Clutter toolkit which used OpenGL to create fast and visually rich GUIs.
OpenMoko : The OpenMoko project has dual objectives, to provide an open source stack for Mobile phones and also to pave the way for developing open hardware for running this stack. The first commercial devices running OpenMoko was the Neo 1973 and the Neo FreeRunner from FIC. It was an open source geek’s dream come true with both open hardware as well as software. The stack is based on the OpenEmbedded specifications.
The above mentioned are just the some of the more popular open source stacks. There are a lot of other commercial open source stacks developed by companies like OpenedHand (now acquired by Intel), Azingo based in Pune and Ziilabs, which focus on PMPs (again based in Pune).
With the phenomenal success of platforms like Acer’s Aspire One or the EeePC or Sony and HP’s Pocket Netbooks, all the Giants have started allocating budgets and resources towards development of open source mobile stacks.
All in all, the day and age for Open Souce Mobile stacks has arrived !!!

Half Adder Animated Digital Electronics

noreply@blogger.com (Hammad Hussain) — Wed, 04 Apr 2012 07:08:00 +0000

In electronics, an adder or summer is a digital circuit that performs addition of numbers. In modern computers adders reside in the arithmetic logic unit (ALU) where other operations are performed. Although adders can be constructed for many numerical representations, such as Binary-coded decimal or excess-3, the most common adders operate on binary numbers. In cases where two's complement or one's complement is being used to represent negative numbers, it is trivial to modify an adder into an adder-subtractor. Other signed number representations require a more complex adder.

A full adder can be implemented in many different ways such as with a custom transistor-level circuit or composed of other gates. One example implementation is with S = A \oplus B \oplus C_{in} and C_{out} = (A \cdot B) + (C_{in} \cdot (A \oplus B)).
Example full adder circuit diagram
Inputs: {A, B, Cin} → Outputs: {S, Cout}
File:Full Adder.JPG
Example full adder circuit diagram using only NAND and XOR gates
Inputs: {A, B, Cin} → Outputs: {S, Cout}

In this implementation, the final OR gate before the carry-out output may be replaced by an XOR gate without altering the resulting logic. Using only two types of gates is convenient if the circuit is being implemented using simple IC chips which contain only one gate type per chip.

A half adder is a logical circuit that performs an addition operation on two one-bit binary numbers often written as A and B. The half adder output is a sum of the two inputs usually represented with the signals Cout and S where sum = 2 \times C_{out} + S. Following is the logic table for a half adder:

Microsoft Visio 2003 portable free

noreply@blogger.com (Hammad Hussain) — Mon, 26 Mar 2012 06:27:00 +0000

Download Microsoft Visio 2003 Portable

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macromedia Flash 8 portable

noreply@blogger.com (Hammad Hussain) — Mon, 26 Mar 2012 06:20:00 +0000

Macromedia Flash 8 portable

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