http://hdl.handle.net/10150/105067 Fri, 18 May 2012 00:52:07 GMT 2012-05-18T00:52:07Z http://arizona.openrepository.com:80/arizona/retrieve/233431/dlistlogo.gif http://hdl.handle.net/10150/105067 http://hdl.handle.net/10150/224211 Title: Open Courseware initiatives for e-learners in India Authors: Majumder, Apurba Jyoti; Sarma, Gautam Kumar Abstract: Open Courseware is nothing but the repository of the study and learning materials in digital form in the web which is open for every user i.e. Open Access. These repositories envisage to store, index, preserve, distribute and share the digital learning resources with any time access offering interoperability. On the other hand, e-learning covers a myriad set of applications, and processes such as computer based learning, web-based learning, virtual classrooms, etc. What is most significant about the method is that it ensures faster learning at comparatively reduced cost and gives access to more learning resources. In India, a number of institutions are digitizing their course materials and a good number of open courseware have been established e.g. eGyankosh-a National Digital Repository, CEC Learning Object Repository, Indo- German eGurukul on Digital Libraries, NPTEL, NCERT Online Textbooks, UNESCOSALIS e-Learning Portal, etc. This paper presents a scenario of the Open Courseware initiatives in India that can be helpful and necessary to the e-learners. Description: Paper presented in IDEA 2008 & later published in Book form "ODL system in transition" Fri, 01 Jan 2010 00:00:00 GMT http://hdl.handle.net/10150/224211 2010-01-01T00:00:00Z http://hdl.handle.net/10150/219514 Title: A Novel Authenticity of an Image Using Visual CryptographA Cryptography Authors: 1 Prashant Kumar Koshta, 2 Dr. Shailendra Singh Thakur Abstract: A digital signature is an important public-key primitive that performs the function of conventional handwritten signatures for entity authentication, data integrity, and non-repudiation, especially within the electronic commerce environment. Currently, most conventional digital signature schemes are based on mathematical hard problems. These mathematical algorithms require computers to perform the heavy and complex computations to generate and verify the keys and signatures. In 1995, Naor and Shamir proposed a visual cryptography (VC) for binary images. VC has high security and requires simple computations. The purpose of this thesis is to provide an alternative to the current digital signature technology. We introduce a new digital signature scheme based on the concept of a non-expansion visual cryptography. A visual digital signature scheme is a method to enable visual verification of the authenticity of an image in an insecure environment without the need to perform any complex computations. We proposed scheme generates visual shares and manipulates them using the simple Boolean operations OR rather than generating and computing large and long random integer values as in the conventional digital signature schemes currently in use. Description: Information security in the present era is becoming very important in communication and data storage. Data transferred from one party to another over an insecure channel (e.g., Internet) can be protected by cryptography. The encrypting technologies of traditional and modern cryptography are usually used to avoid the message from being disclosed. Public-key cryptography usually uses complex mathematical computations to scramble the message. Sun, 01 Apr 2012 00:00:00 GMT http://hdl.handle.net/10150/219514 2012-04-01T00:00:00Z http://hdl.handle.net/10150/219513 Title: HigHigh-speed Multiplier Design Using Multi-Operand Multipliers Authors: 1,2Mohammad Reza Reshadi Nezhad, 3Kaivan Navi Abstract: Multiplication is one of the major bottlenecks in most digital computing and signal processing systems, which depends on the word size to be executed. This paper presents three deferent designs for three-operand 4-bit multiplier for positive integer multiplication, and compares them in regard to timing, dynamic power, and area with classical method of multiplication performed on today architects. The three-operand 4-bit multipliers structure introduced, serves as a building block for three-operand multipliers in general Description: Multipliers are used in most arithmetic computing systems such as 3D graphics, signal processing, and etc. It is inherently a slow operation as a large number of partial products are added to produce the result. There has been much work done on designing multipliers [1]-[6]. In first stage, Multiplication is implemented by accumulation of partial products, each of which is conceptually produced via multiplying the whole multi-digit multiplicand by a weighted digit of multiplier. To compute partial products, most of the approaches employ the Modified Booth Encoding (MBE) approach [3]-[5], [7], for the first step because of its ability to cut the number of partial products rows in half. In next step the partial products are reduced to a row of sums and a row of caries which is called reduction stage. Sun, 01 Apr 2012 00:00:00 GMT http://hdl.handle.net/10150/219513 2012-04-01T00:00:00Z http://hdl.handle.net/10150/219532 Title: A Novel Method for Water irrigation System for paddA paddy fields using ANN Authors: 1L. Prisilla, 2P. Simon Vasantha Rooban, 3Dr. L. Arockiam Abstract: Water is an essential resource in the earth. It is also essential for irrigation, so irrigation technique is essential for agriculture. To irrigate large area of lands is a tedious process. In our country farmers are not following proper irrigation techniques. Currently, most of the irrigation scheduling systems and their corresponding automated tools are in fixed rate. Variable rate irrigation is very essential not only for the improvement of irrigation system but also to save water resource for future purpose. Most of the irrigation controllers are ON/OFF Model. These controllers cannot give optimal results for varying time delays and system parameters. Artificial Neural Network (ANN) based intelligent control system is used for effective irrigation scheduling in paddy fields. The input parameters like air, temperature, soil moisture, radiations and humidity are modeled. Using appropriate method, ecological conditions, Evapotranspiration, various growing stages of crops are considered and based on that the amount of water required for irrigation is estimated. Using this existing ANN based intelligent control system, the water saving procedure in paddy field can be achieved. This model will lead to avoid flood in paddy field during the rainy seasons and save that water for future purposes. Description: In our country farmers have to face many difficulties because of the poor irrigation system. During flood situation, excessive waters will be staged in paddy field producing great loss and pain to farmers. So, proper Irrigation mechanism is an essential component of paddy production. Poor irrigation methods and crop management are rapidly depleting the country’s water table. Most small hold farmers cannot afford new wells or lawns and they are looking for alternative methods to reduce their water consumption. So proper irrigation mechanism not only leads to high crop production but also pave a way for water saving techniques. Automation of irrigation system has the potential to provide maximum water usage efficiency by monitoring soil moistures. The control unit based on Artificial Neural Network is the pivotal block of entire irrigation system. Using this control unit certain factors like temperature, kind of the soil and crops, air humidity, radiation in the ground were estimated and this will help to control the flow of water to acquire optimized results. Sun, 01 Apr 2012 00:00:00 GMT http://hdl.handle.net/10150/219532 2012-04-01T00:00:00Z