P A College of Engineering

About: P A College of Engineering is a based out in . It is known for research contribution in the topics: Dihedral angle & Ring (chemistry). The organization has 298 authors who have published 594 publications receiving 4888 citations.

A Study on Usage of Total Productive Maintenance (TPM) in Selected SMEs

Abstract: In the present competitive economic environment, it is very much essential for the manufacturing plants to achieve world class operation standards along with high quality and timely delivery of goods. This requires excellent maintenance practices to increase the availability of the machines, to reduce production cost and to produce goods with desired quality level. Total Productive Maintenance (TPM) implementation is an approach to improve the performance of maintenance activities. It aims to maximize the equipment effectiveness by the total participation of all employees. But most of the manufacturing plants are not able to harvest the benefits of TPM practices due to lack of planning and proper awareness. This work is carried out in order to study the usage of TPM in the selected SMEs (Small and Medium sized Enterprises). A total of 50 SMEs involving manufacturing, process and service industries are considered for the study. The primary data is collected through a structured questionnaire consisting of 24 questions related to TPM implementation. The respondents are randomly selected involving chief executives, engineers, managers and supervisors. A five point Likert scale is selected to rate the respondent's opinion. The results are analysed using simple graphical representations and conclusions are drawn based on the feedback obtained from the respondents. It has been found that 52% of SMEs (26 out of 50) have adopted TPM in their organizations and remaining 48% have not yet implemented TPM. The study helps to find out the extent to which the TPM being used in SMEs and what are the possible reasons for not implementing TPM.

Merits and Limitations of Mathematical Modeling and Computational Simulations in Mitigation of COVID-19 Pandemic: A Comprehensive Review.

Abstract: Mathematical models have assisted in describing the transmission and propagation dynamics of various viral diseases like MERS, measles, SARS, and Influenza; while the advanced computational technique is utilized in the epidemiology of viral diseases to examine and estimate the influences of interventions and vaccinations. In March 2020, the World Health Organization (WHO) has declared the COVID-19 as a global pandemic and the rate of morbidity and mortality triggers unprecedented public health crises throughout the world. The mathematical models can assist in improving the interventions, key transmission parameters, public health agencies, and countermeasures to mitigate this pandemic. Besides, the mathematical models were also used to examine the characteristics of epidemiological and the understanding of the complex transmission mechanism. Our literature study found that there were still some challenges in mathematical modeling for the case of ecology, genetics, microbiology, and pathology pose; also, some aspects like political and societal issues and cultural and ethical standards are hard to be characterized. Here, the recent mathematical models about COVID-19 and their prominent features, applications, limitations, and future perspective are discussed and reviewed. This review can assist in further improvement of mathematical models that will consider the current challenges of viral diseases.

1-(3-Bromo-2-thienyl)-3-(6-methoxy-2-naphthyl)prop-2-en-1-one

Abstract: The title compound, C18H13BrO2S, is chiral due to the twist of the naphthalene and thienyl rings about the chalcone backbone dihedral angle = 1775 (10)degrees] There are weak C - H center dot center dot center dot O interactions which link the molecules into chains in the b direction

Redetermination of α- D -glucosamine hydrochloride: elucidation of the hydrogen-bonding scheme

Abstract: The previously reported crystal structures Chu & Jeffery (1965). Proc. R. Soc. London Ser. A, 285, 470 - 479; Chandrasekharan & Mallikarjunan (1969). Z. Kristallogr. 129, 29] of the title compound, C6H14NO5+ center dot Cl-, have been confirmed to higher precision, and the H atoms located, allowing the elucidaton of the hydrogen- bonding network. A combination of O - H center dot center dot center dot O, N - H center dot center dot center dot O, O - H center dot center dot center dot Cl and N - H center dot center dot center dot Cl links results in a three- dimensional network. Considered by themselves, the inter- cation O - H O and N - H center dot center dot center dot O hydrogen bonds result in undulating (001) layers. The configurations of the chiral C atoms are: C1 S, C2 R, C3 R, C4 S and C5 R.