YMCA University of Science and Technology

About: YMCA University of Science and Technology is a education organization based out in Faridabad, India. It is known for research contribution in the topics: Web page & Web crawler. The organization has 299 authors who have published 568 publications receiving 4547 citations.

Analyzing the factors affecting the flexibility in FMS using weighted interpretive structural modeling (WISM) approach

Abstract: A high degree of flexibility is required for advancement in technology, rapid delivery to market, meeting customers demands and flexible manufacturing system is ideal for solving these problems. There are some variables which not only affect the flexibility but also affect each other. In this paper, twelve factors have been identified through the literature review and they are further analysed with the help of weighted interpretive structural modeling approach. In this research, a questionnaire based survey was conducted to rank these factors and ISM based approach has been employed to analyse their mutual interaction and interpretation of factors in terms of their driving and dependence powers has been examined. The structural model developed using this methodology helps to understand the interaction between various factors affecting the flexibility and their managerial implications. A method of effectiveness index is used to identify the key factors. The effectiveness index evaluated in this paper will help the industries to benchmark their performance by focussing on the factors reported in this paper.

Reliable delay sensitive loss recovery protocol for critical health data transmission system

Abstract: Wireless Body Area Network (WBAN) is a special kind of sensor network deployed with low power, intelligent sensors, which are placed on the human body to collect human's vital signs, while monitoring body functions and the surrounding environment. Many applications of WBAN demand Reliable communication service; since the majority of these applications are responsible for handling time-critical data. Such an application area is a healthcare system, which offers flexibility and mobility to patients through the internet. Due to the long propagation delay and high loss rate in the WBAN, it is very tough to provide reliable data transfer for time-critical applications. In this paper, we analyze all these issues and design an efficient Reliable Delay Sensitive Loss Recovery protocol (RDSLR) for handling critical and non-critical data in WBAN. We emphasize on arrival of heterogeneous data (i.e. traffic flow) within the expected time for the analysis of actual health conditions of a patient. Reliable and loss-free data transmission requirements in a healthcare system desire arrival of data within the predefined critical time interval. Thereby, we enhance the loss recovery and delay module considering critical time parameters as an account. We evaluate the performance of the proposed approach by taking packet loss rate, elapse time, loss error time, and reliability time as key metrics.

Different aspects in design and development of flexible fixtures: review and future directions

Abstract: Widely used in manufacturing, fixtures have a direct impact upon product manufacturing quality, productivity and cost. The cost of designing and fabricating fixtures can amount to 10 ± 20% of the total manufacturing system cost. To reduce manufacturing costs, a flexible fixture system should be designed to be competent in fixturing as many workpieces as possible. This paper carries out a literature review of different aspects in design and development of flexible fixture. This review considers introduction and literature review with significant researches and requirements of fixtures over time, steps of fixture design along with their classification review has been presented to give a deep and quick understanding of fixture design and its criteria. Important and relevant research carried out in the field of CAFD using intelligent approaches that have been utilised in automation has been reviewed. The shortcomings of the existing research studies are stated and future directions are proposed.

Design of improved performance rectangular microstrip patch antenna using peacock and star shaped dgs

Abstract: In this paper, two novel defected ground structures (DGS) are proposed to improve the return loss, compactness, gain and radiation efficiency of rectangular microstrip patch antenna. The performance of antenna is characterized by the shape, dimension & the location of DGS at specific position on ground plane. By incorporating a peacock shaped slot of optimum geometries at suitable location on the ground plane, return loss is enhanced from -23.89 dB to -43.79 dB, radiation efficiency is improved from 97.66% to 100% and compactness of 9.83% is obtained over the traditional antenna .Simulation results shows that the patch antenna with star shaped DGS can improve the impedance matching with better return loss of -35.053 dB from -23.89 dB and compactness of 9% is achieved. In the end comparison of both DGS shapes is carried out to choose one best optimize one. The proposed antennas are simulated and analyzed using Ansoft HFSS (version 11.1) software.

Information Retrieval from the Web and Application of Migrating Crawler

Abstract: Study reports that about 40% of current internet traffic and bandwidth consumption is due to the web crawlers that retrieve pages for indexing by the different search engines. As the size of the web continues to grow, searching it for useful information has become increasingly difficult. The centralized crawling techniques are unable to cope up with constantly growing web. In this paper it is presented that distributed crawling methods based on migrating crawlers are an essential tool for allowing such access that minimizes network utilization and also keeps up with document changes.