Operating System Concepts

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WiTrack (Through-wall 3D Tracking using body Radio Reflections)

Through-Wall 3D Tracking Using Body Radio Reflections

WiTrack is a device that tracks the 3D motion of a user from the radio signals reflected off her body. It works even if the person is occluded from the WiTrack device or in a different room. WiTrack does not require the user to carry any wireless device, yet its accuracy exceeds current RF localization systems, which require the user to hold a transceiver. It transmits wireless signals whose power is 100 times smaller than Wi-Fi and 1000 times smaller than cellphone transmissions.

WiTrack localizes the center of a human body to within 10 to 13 cm in the x and y dimensions (about the size of an adult hand), and 21 cm in the z dimension. It also provides coarse tracking of body parts, identifying the direction of a pointing hand with a median of 11.2 degrees. It can also detect falls with 96.9% accuracy. WiTrack can be incorporated into consumer electronics and has a wide set of applications.

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Gaming in the Entire Home WiTrack enables games in which users move around freely in the entire home. Unlike today's gaming interfaces (like Xbox Kinect), it does not require a player stand right in front of it to play a game. It can stalk him as he runs down hallways or hides behind furniture and walls from video game enemies.

Elderly Monitoring & Fall Detection Falls are the leading cause of both fatal and nonfatal injuries among adults aged 65 and over. Current fall detection systems require the user to wear sensors or place cameras in her home, which invade her privacy. WiTrack can detect falls with 96.9% accuracy, even through walls and simply by using reflections off a person's body.

Controlling Household Appliances WiTrack allows a user to control a household appliance, like turning a light on or off, by simply pointing his or her hand in its direction - even if it is in a completely different room.

ایم آئی ٹی کا تیار کردہ وائی ٹریک … ٹریکنگ سسٹم جو دیوار اور رکاوٹوں کے پار بھی کام کرتا ہے

ایم آئی ٹی کی کمپیوٹر سائنس اینڈ آرٹی فیشل انٹیلی جنس لیبارٹری کے محققین نے ایک ہائی ریزولوشن ، تھری ڈی موشن ٹریکنگ سسٹم تیار کیا ہے جو دیوار اور دیگر رکاوٹوں کے پار بھی کام کرسکتا ہے۔ یہ سسٹم ایک جگہ پر مستقل طور پر کمپیوٹر کے ساتھ نصب ہوتا ہے اور کسی چلتے پھرتے شخص کو پورے گھر میں انتہائی درستگی کے ساتھ ٹریک کرسکتا ہے۔ حتیٰ کہ اگر وہ شخص کسی دیوار کے پیچھے چلا جائے تو بھی یہ سسٹم اس کی پوزیشن شناخت کرسکتا ہے۔ اس سسٹم کی ریزولوشن بھی زبردست ہے جس کی وجہ سے یہ دیوار کے پیچھے سے کئے گئے اشاروں ( ہاتھ کا اشارہ یا جسم کی کوئی مخصوص حرکت) کو بھی آسانی سے شناخت کرسکتا ہے۔

وائی ٹریک انتہائی سادہ اور سستا سسٹم ہے۔ جبکہ اس کے مقابل مائیکروسافٹ Kinect عام اور انفرا ریڈ کیمروں کی مدد سے ٹریکنگ کرتا ہے (اسے کمپیوٹر وژن کہا جاتا ہے) ۔ یہی وجہ ہے کہ کنکٹ رکاوٹوں کے پار کام نہیں کرتا۔ کیمروں کی مدد سے حاصل شدہ ڈیٹا کو سمجھنے کے لئے اسے ایک پیچیدہ الگورتھم سے گزارا جاتا ہے۔ اس کے مقابلے میں وائی ٹریک میں کیمرے استعمال ہی نہیں کئے جاتے اور پروسسینگ کا کام بھی سادہ ہے۔

وائی ٹریک وائرلیس ٹریک کا مخفف ہے اور یہ اشیاء (یا شخص) کی حرکت کو ریڈیو ویووز کے ذریعے شناخت کرتا ہے۔ یہ ریڈیو وویوز انتہائی کم قوت کی ہوتی ہیں۔ محققین کے مطابق یہ وائی فائی سگنلز کی قوت سے 100 گنا کمزور اور موبائل فون کی شعاعوں سے 1000 گنا تک کمزور ہوتی ہیں۔ اس سے اندازہ ہوتا ہے کہ ان ریڈیو ویووز کی قوت 1 سے 2 ملی واٹ تک ہوسکتی ہے۔ اس سسٹم میں کل 4 انٹینا نصب ہوتے ہیں۔ ایک انٹینا سے ریڈیو ویووز نشر کی جاتی ہیں جبکہ باقی تین انٹینوں سے نشر کی گئی شعاعوں کو وصول کیا جاتا ہے

Oracle Database 10g Express Edition Tutorial

 Oracle Database 10g Express Edition Tutorial!

This tutorial prepares the Oracle Database 10g Express Edition Developer to perform common development and administrative tasks of Oracle Database 10g Express Edition.

Learning Objectives

After taking this tutorial, you should be able to:

	Install Oracle Database 10g Express Edition
	Access the Oracle Database Home Page
	Manage Database Objects
	Access and Manipulate Data
	Create an Application using HTML DB 2.1
	Add PL/SQL Functionality to an Application
	Administer and Monitor the Database
	Create an Application using Visual Studio .NET
	Create an Application using PHP

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MACRORIT Disk Partition Expert Free

MACRORIT Disk Partition Expert

Macrorit Disk Partition Expert is powerful free partition software allows you to extend partition  settle low disk space problem, manage disk space easily, it is also the only one free disk partition management software possesses advanced technology of power-off protection and data disaster recovery. This totally free disk management utility is designed for home users which supports 32/64 bit Windows Operating System including Windows XP, Vista, Windows 7 and latest Windows 8.1.

Availability: Free
File Size: 3.9MB

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Oracle Database express edition 10G

Oracle Database express edition 10g

Oracle Database XE is the perfect choice for many different groups, including:
• Developers working on PHP, Java, .NET, and other applications that require a database
• DBAs who need a free starter database for training and deployment
• Independent Software Vendors (ISVs) who want to embed an Oracle database in their application or product to extend customer value at no additional cost
• Educational institutions and students who need a free starter database for their curriculum.

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PAKISTANI STUDENTS SENT SATELLITE TO SPACE VIDEO

Post by The I.TEANzzz.

PAKISTANI STUDENTS SENT SATELLITE TO SPACE

         iCUBE-1 Launch  .

A Stupendous Achievement by Institute of Space Technology

Pakistan’s first Cubesat satellite, iCUBE-1, was launched on Thursday at 1210 hrs onboard Dnepr launch vehicle from Yasny launch base, Russia. It is welcoming news for Higher Education Institutions, students and researchers of Pakistan that Institute of Space Technology (IST) has etched its name among the foremost universities in the World who have built and launched a cubesat satellite. This CUBESAT satellite will open up a wide vista of future experiments that can be carried on cubesats in the domain of imaging, microgravity, biology, nano technology, space dynamics, chemistry, space physics and various other fields. Cubesats can also provide a test bed for developing satellite constellations for specific applications. Institute of Space Technology has achieved this astounding success in a short span of ten years, owing to the concerted efforts by its leadership, students and faculty to standout in this field and to create a national center of excellence in space technology. The Vice Chancellor IST, Imran Rahman congratulated ‘Team IST’ for this great achievement.  He specifically thanked the Federal Minister for Planning, Development & Reforms, Prof. Ahsan Iqbal, Chairman HEC and Chairman of our National Space Agency for their continuous encouragement, support and help in achieving this milestone.

ICUBE-1 has been launched in a polar orbit, 600 Km above the surface of the Earth, and is designed to take low resolution images of Earth and other space objects. Initially, ICUBE-1 will transmit a Continuous Wave Morse coded beacon with message “ICUBE-1 First CubeSat of Pakistan”. Ham radio operators have a great opportunity to hear those signals on the VHF band. ICUBE-1 has a mass of 1.1 Kg and is thus categorized as a pico-satellite. The satellite has a volume of 10cm cube and it houses several sensors to collect data for scientific purposes. ICUBE-1 is a fully autonomous satellite and is capable of maintaining its health via its on-board computer. The satellite will send its health data to ground stations and can also be commanded from Satellite Tracking and Control Station at IST.

Launch of ICUBE-1 is a significant milestone in the space program of Pakistan as it will motivate our youth to take a more active part in the future satellite development program of Pakistan.

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Functional And Non-Functional Requirments of a website

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Hard Disk Structure Pdf

Hard Disk Structure Pdf

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Programing Windows 8 Apps

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DATABASE SYSTEMS

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Hyper-threading and its drawbacks

Hyper-threading(officially Hyper-Threading Technology or HT Technology, abbreviated HTT or HT)
For each processor core that is physically present, the operating system addresses two virtual or logical cores, and shares the workload between them when possible. The main function of hyper-threading is to decrease the number of dependent instructions on the pipeline. It takes advantage of superscalar architecture (multiple instructions operating on separate data in parallel). They appear to the OS as two processors, thus the OS can schedule two processes at once. In addition two or more processes can use the same resources. If one process fails then the resources can be readily re-allocated.

Hyper-threading requires not only that the operating system supports SMT, but also that it be specifically optimized for HTT, and Intel recommends disabling HTT when using operating systems that have not been optimized for this chip feature.


Drawbacks
When the first HT processors were released, many operating systems were not optimized for hyper-threading technology (e.g. Windows 2000 and Linux older than 2.4).
In 2006, hyper-threading was criticised for energy inefficiency. For example, specialist low-power CPU design company ARM stated simultaneous multithreading (SMT) can use up to 46% more power than ordinary dual-core designs. Furthermore, they claimed SMT increases cache thrashing by 42%, whereas dual core results in a 37% decrease.  Intel disputed this claim, stating that hyper-threading is highly efficient because it uses resources that would otherwise be idle.
In 2010, ARM said it might include simultaneous multithreading in its future chips; however, this was rejected in favor of their 2012 64-bit design.

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