Abstract:Due to wide-range low dc output voltage, the renewable energy sources cannot support the ac or dc electrical appliances directly. Consequently, a step-up converter is required. Currently using photovoltaic systems has several energy conversion stages. As the conversion stages increases power loss, switching loss and harmonics increases. So as to overcome these disadvantages, a new DC-DC-AC converter has been proposed in this paper which exhibits several advantages, the most important of which is the ability to generate both DC and AC outputs higher than the DC source voltage in a single stage with reduced number of switches. So the DC-DC-AC converter can connect the renewable energy sources directly to AC and DC equipment’s. The proposed technology has wide range of applications including industrial, domestic, agricultural, marine etc. The simulations were done in MATLAB/Simulink and both the DC as well as AC output voltages obtained from DC-DC-AC converter were verified.

Keywords:DC-DC-AC Converter, Differential Boost Inverter (DBI), Interleaved Boost Converter (IBC)

Abstract:Our reckless life has pushed us to follow online lifestyle. It has made our lives comfort that even foods reached our doorsteps with a single tap. Often, we tend to ignore the work stress of food delivery executives. This article checks through its pros and cons. Stress consumed the minds of people. ‘Stress is the psychological and physical state that results when the resources of the individual are not being sufficient to cope with the demands and pressures of the situation’. The present study was to evaluate the pros and cons of job stress, impact of coping mechanism and job performance of executives in selected online food delivery services. The study reported responses of 210 online food delivery executives. The convenient random sampling method was adopted for collecting data. For analysis purposes, Chi square test, Correlation and independent t- test were used. The researcher culminated that online food delivery executives to realise the intensity of stress coping mechanism are best solution to overcome the stress in job performance.

Keywords:Executives, Job performance, Job stress, Stress management, Stress coping mechanism, Online food ordering (delivery) service.

Abstract:The Dalit movement is a social as well as political movement of Dalits in India started by B.R. Ambedkar. This movement rejects Hinduism; it challenged the brutal caste system and promulgated the rights of Dalits. There is Four classes of caste system in Hindus; Brahmins, Kshatruyas, Vaisyas, Sudras. Dalits are mostly exploited class of Hindus. The caste reforms of 19th century were influenced by the work of Christian Missionaries in India. The Brahmo Samaj, the Prarthana Samaj, The Ramakrishna Mission and Arya Samaj are the examples of such institutions founded with a view to fight against Social evils practiced by the Caste Hindus. In this paper I will discuss Dalit movement, different social reforms organization, caste harassment, great social reformer personalities etc.

Keywords:Hygiene; Dalit womens, Up-liftment ,exploitation ,procutation, un-touchability, inequality

Abstract:Due to industrialization the amount of effluent discharged in environment has increased rapidly with time. The safe disposal of these effluent is a major issue that is been faced all over the world. One of the major predicaments faced by geotechnical engineers around the world is land contamination. The effluent when it comes in contact with soil causes changes the engineering behaviour of the soil which may affect the stability of the foundation and pavements. In some cases the changes caused by these effluents can either improve or degrade the engineering behaviour of soil. If there is an improvement in engineering behaviour of soil, there is a value addition to the industrial wastes serving the three benefits of safe disposal of effluent, using as a stabilizer and return of income on it. If there is degradation of engineering behaviour of soil then solution for decontamination is to be obtained. Hence an attempt is made in this present study that the effect of certain Industrial effluents such as Soap effluent, on the plasticity, compaction characteristic and shear strength parameters of red soil. Effluents were added in the percentage of 5%, 10%, 15%, 20% and 25% by the dry weight of the soil for a curing period of 7, 14, 28 and 60 days. Results of the study shows that Soap Effluent increases the maximum dry density with decrease in optimum moisture content, lowers the liquid limit, plastic limit and higher the shrinkage limit. It can be inferred that the increase in percentage of soap effluent with increase in curing period causes the marginal variations in geotechnical properties of red soil. When soil interacts with industrial effluents, the interaction changes the pore fluid chemistry and subsequently the thickness of diffused double layer. These changes are likely to be reflected by variation in engineering properties.

Keywords:Degradation, Diffused double layer, Pore fluid chemistry, Soap effluent.

Abstract:Reservoir and foundation affect the dynamic characteristics especially modal frequencies and consequently the dynamic response of arch dams. A study is performed in this paper to view the effect of reservoir presence, foundation and fluid-dam interfaces modelling on modal behavior of arch dam using ANSYS. To represent water reservoir, two methods such as added masses approach and finite element method are adopted here.

Keywords:Ansys, Arch dam, Modal frequency, PLANE 182