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.

Speed control of Mobile Robotic System using PI, PID and Pole Placement Controller

Abstract: Mobile Robotic System (MRS) is an automatic machine capable to move in it's environment to carry out task in field of logistic area. It is a battery or an electric motor operated Computer Controlled mobile transport system. The development of Mobile Robotic System is one of the areas of research. This paper presents the Identification and Parameter Control of Mobile Robotic System. Open loop response of MRS has been simulated and analyzed in this paper. The analysis of open loop response for speed of MRS shows that it is not up to the mark; so; to improve the Speed response of MRS; different type of controller such as PI; PID controllers are implemented and simulated. Furthermore; to enhance its performance full state feedback controller (Pole Placement Controller) is used. Implementation and simulation of different controllers on MRS has been done using MATLAB software tool. Comparison of performance parameters of MRS using different controllers has been done to justify the preference of particular controller.

Activity concentration and annual effective ingestion dose assessment due to natural radionuclides present in cereal samples consumed by inhabitants of India

Abstract: In the present study, activity concentration and annual effective ingestion dose assessment was carried out in cereal samples using gamma spectrometry. In the studied samples the activity of 226Ra, 238U, 232Th, and 40K varied from 10.25±0.94 Bq/kg to 29.13±0.69 Bq/kg, 7.04±0.13 Bq/kg to 20.08±1.32 Bq/kg, 22.20±2.46 Bq/kg to 58.21±1.15 Bq/kg and 1158.4±26.05Bq/kg to 1962.2±18.17 Bq/kg with an average value of 20.06±4.82 Bq/kg, 13.08±1.31 Bq/kg, 41.53±3.77 Bq/kg, and 1639±75.55 Bq/kg respectively. The average value of annual effective ingestion dose from ingested food was 0.62±0.08 mSv/y, 0.07±0.006 mSv/y, 1.20±0.11 mSv/y, and 1.28±0.06 mSv/y from 226Ra, 238U, 232Th, and 40K, respectively. The average value of total ingestion dose and cancer risk was found to be 3.18±0.14 mSv/y and (79.5±3.55) × 10−4 respectively.

Efficient thermal utilization in MEMS bulk micromachined pyroelectric infrared sensor using thermal oxide thin layer

Abstract: Pyroelectric infrared sensors utilize interfacial polymer bonding, thick porous silica layer and Si3N4 thin film as conventional methods of reducing heat sinking with substrate. The thick polymer and porous silica layers cause additional enhancement in thermal time constant (?D) as well thermal mass (Cth) of pyroelectric sensor which reduces the rate of temperature change (dT/dt) and limits responsivity at lower frequencies. The SiO2 thin layer posses lower heat conductivity than Si3N4 thin films and often used in Si bulk micromachining as etch barrier. This paper proposes use of micromachined SiO2 thin membrane as thermal insulation layer in bulk micromachined pyroelectric infrared sensor. The study is supported by the comparative radiation heat transfer, finite element analysis and the practical thermal measurements on fabricated pyroelectric infrared sensor using non destructive thermal imaging method.

Social implications of leagile manufacturing system: TISM approach

Abstract: Leagile is a combination of both lean and agile paradigms; it involves the advantages of both lean as well as agile systems. Through this paper an attempt has been made to study the social implications of this high technology related manufacturing on Indian society. Furthermore, total interpretive structural modelling (TISM) technique has been utilised to identify the driving and dependent social implications of leagile manufacturing. Moreover, TISM technique has been used in finding the mutual relations of these social implications by developing a model. This TISM model may be utilised to identify the key social implications which will be helpful in the area of leagile manufacturing. In the present study, social implication of leagile manufacturing has been identified through literature study and experts review and an TISM model has also been prepared.

Evaluation of gas turbine power plant efficiency using graph theoretic approach

Abstract: This paper presents a methodology based on graph theoretic approach (GTA) to design a new gas turbine power plant (GTPP), upgrading of existing plant and evaluation of two real life operating gas turbine power plants. Different combinations may be recommended by a manufacturer to an organization for selecting or improving the thermal efficiency of a power plant. This paper recognizes various design parameters affecting the gas turbine power plant efficiency. All these parameters are interacting with each other by different amounts. An attempt has been made to develop a mathematical model of GTPP from these interacting parameters using GTA. A GTPP efficiency index is proposed which assesses the influence power of these parameters.