Asian Journal of Engineering, Sciences & Technology

Abbreviated key title: AJEST
ISSN: 2077-1142
Published by: Iqra University
Periodicity: Bi-Annualy
Months: March & September
Start year: 2011

Title: A Systematic Approach to Retrieve Semantically Similar Documents Author(s): Tariq Hussain Laghari, Syed Sajjad Hussain and Manzoor Hashmani

Abstract: Finding required information on any particular topic give rise information retrieval (IR) problems. Information retrieval techniques resolved these issues but these techniques are unable to extract opinions from unstructured text. Hence, for this problem opinion mining techniques are utilized. Opinion mining extracts opinions from unstructured data source efficiently but it extracts opinions with polarity either negative or positive. The single topic or product where one opinion is similar to another, opinion mining is unable to detect semantic similarity between opinions which are semantically similar. There are other tools available too (Turnitin, Viper, PlagScan) for retrieving the text or documents on the basis of text syntax. However, a system is required which retrieves text with respect to semantics of the text or opinions despite of text syntax. In this study we proposed a system to retrieve text on basis of semantic similarity among text or opinions from a collection of texts (entire corpus). This system utilizes Latent Semantic Indexing to ?nd the semantic similarity in Recognizing Textual Entailment (RTE) dataset. Features of text dataset (RTE) are term frequencies obtained from term document matrix. Implementation of our proposed system showed convincing results by retrieving semantically similar documents from RTE-3 dataset. We provide multiple queries and system retrieved documents similar to each query respectively. In addition we analysed input parameters affecting the output results which can be understood from variation in evaluation matrices that are Precision and Recall.


Title: Design and Implementation of a DTMF Based Pick and Place Robotic Arm Author(s): Muhammad Hassan and Mohtashim Baqar

Abstract: In recent times, developments in field of communication and robotics has progressed with leaps and bounds. In addition, the blend of both disciplines has contributed heavily in making human life easier and better. So in this work while making use of both the aforementioned technologies, a procedure for design and implementation of a mobile operated mechanical arm is proposed, that is, the proposed arm will be operated via a cellular device that connects with the receiver mounted on the robotic arm. Moreover, over the duration of a call, if any key is pressed from the cellular device than an indicator indistinct to the key pressed is noticed at the receiver side. This tone represents superimposition of two distinct frequencies and referred to as DTMF (dual tone multi-frequency). Further, the mechanical arm is handled via the DTMF tone. Also, the acquired tone at the receiver is taken into a micro-controller (ATMEGA16) using the DTMF decipher module i.e. MT8870. Further, the decipher module unwinds the DTMF signal into its corresponding two bit representation and then the matched number is transmitted to the micro-controller. The micro-controller is programmed to take an action based on the decoded value. Further, the micro-controller forwards control signals to the motor driver unit to move the arm in forward/backward or multi-directional course. Lastly, the mechanical arm is capable of picking and placing objects while being controlled wirelessly over GSM (Global System for Mobile Communications).


Title: Motion SURF Referral System for Hard Exudates Author(s): Syed Ali Gohar Naqvi, Hafiz Muhammad Faisal Zafar and Ihsan ul Haq

Abstract: Hard exudates are the leading causes of blindness and blurred vision in individuals suffering from Diabetic Retinopathy. Ophthalmologists become overloaded due to examination of eye fundus images in hard exudates manual detection process. In the presented work a system for detection of hard exudates is proposed. Proposed system is formed through utilization of different mathematical and image processing tools and shows promising results.


Title: Touch Screen Wireless Spying Robot (Spy Robot) Author(s): Shayan Ahmed, Waqar Qayyum, Yousuf Ahmed and Jawwad Ahmad

Abstract: This project is intended to design a robotic vehicle controlled by the assistance of android application for remote operation. Remote camera is joined with automated vehicle for checking the circumstance around the robot. The robot with the remote camera can transmit ongoing audio and video with night vision abilities with the assistance of RF (radio recurrence) signals. This kind of robot can be helpful for spying reason in any field. At the client end android application supported gadget like Cell phone or tablet and so forth is utilized. Commands are sent to the robot for controlling the operation of the robot either moves left, right, forward or in reverse. At the receiving end blue-tooth is attached with the Arduino to receive the command and two motor are interfaced with an Arduino via motor driver where they are used for the movement of vehicle. The voltage DC source is taken from the chargeable batteries attached with the robot module for Arduino, blue-tooth and motor driver. The camera consists of own receiver which is with the user and is attached with the LCD for monitoring the surrounding of robot.


Title: Energy Metering and Load Controlling System Author(s): Syed Muhammad Haseeb Ahmed, Turab Ali Mahmood, Syed Kazim Hussain Rizvi and Syed Mohsin Ali

Abstract: In modern world Humans rely most on Electricity, as a form of energy, to run their day-to-day businesses. In fact it will not be an exaggeration to say that mankind in increasingly getting dependent on it; itís everywhere! This importance in turn results in: (a) Finding different and cheaper means to generate electricity, ?rst it was fossil fuel (oil) then water and solar and the list goes on. (b) Conserving and reducing the wastage of electrical energy. In this project we aim to explore part-b by Monitoring electrical parameters to examine the usage of electricity and Load controlling with the help of sensors to ?nd ways to avoid energy wastage. Design and implement single solution for smart energy meter and load controlling by using Programmable Logic Controller (PLC) and Human Machine Interface (HMI).


Title: Graphene to Supplement Conventional Electrode Materials in Lithium-Ion Batteries: Opportunities and Challenges Author(s): Haris Habibullah Sajwani

Abstract: Graphene is extracted from graphite and possesses some the ideal characteristics of very light weight, high conductivity, and chemical stability. The conventional materials used as LIB electrodes fail to meet the increasing demand of more efficient, faster, and lighter charge storing cells. This magnifies the role of graphene to be used as supplementary material for achieving higher levels of battery charge capacity, reduced charge losses during discharge, and greater cyclic stability over a longer duration. The researcher has examined graphene as a hybrid or supplementary element with lithium iron phosphate (LiFePO4), manganese oxide, (MnO2), and cobalt oxide (Co3O4), which are currently used as cathode materials, and with lithium titanium oxide (Li4Ti5O12) and silicon (Si), which are presently used as anode materials. Graphene as supplementary cathode material exhibited benefits of greater charge capacitance and cyclic stability, while at the anode it exhibited benefits of reduced discharge losses and reduced volumetric expansion. The integration of graphene at anode was met with fewer challenges than at the cathode as anode act as active charge carrier during the charging process and carbon-family elements serve as good charge retainers.


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