http://nopr.niscpr.res.in/handle/123456789/60117 2026-10-10T20:32:26Z http://nopr.niscpr.res.in/handle/123456789/61074 Title: Time scaled modulated signal and its variation in real saturated time shifted communication strategies Authors: Srivastav, Atul Ranjan Abstract: This paper explores those standards through which Time Scaled modulated signal can be applied in different communication strategies depending on the frequency and phase of the amplitude. It is necessary to tackle physical topology challenges and to adequately use a limited platform. We should take a simple scaled signal and generate quality and compare it with theoretical values to applaud the traditional values. We have signal statistics that are unknown and varying in real-time implementations. We have signal statistics that are unknown and changing throughout time. Therefore if we try to time-stretch the signal by making it faster, we do not have the ability to grab the future frames which makes speeding up the signal impossible. Howeve, in order to slow down the signal we are simply, in some cases, repeating parts of the known signal, therefore time-stretching used to decrease the speed of signal. Page(s): 59-64 2022-12-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/61073 Title: High performance perovskite-silicon tandem solar cells Authors: Shukla, Naman; Lal, Dharam; Tiwari, Sanjay Abstract: Equipped with simple fabrication and efficient technique of converting solar energy into electricity, perovskite-silicon tandem solar technology is being seen as an attractive and promising option in the field of solar energy. Perovskite-Si tandem solar cell structures with multiple junctions achieve efficiency higher than the experimental efficiency limits of a single p-n junction solar cell. Even after two decades, the efficiency of the prevailing silicon solar cell technology is stuck at a maximum of about 26%. Perovskite-silicon tandem solar cells are a possible alternative to this problem. High efficiency is recently reported by using organic-inorganic lead halide perovskite. Perovskite solar device made from low cost and simple manufacturing process, possess inherent characteristics like light in weight, flexible, semi-transparent etc. The thermal instability and moisture sensitivity in perovskite materials are still under-performed when compared to silicon materials. The numerical simulation of perovskite- Si tandem solar cells has been performed. The perovskite active absorber layer is placed at the top and the silicon at the bottom, with band gaps of 1.54 eV, 1.12 eV respectively. The optical and electrical studies of perovskite-silicon tandem solar cells have been done using SCAPS-1D simulation technique. Tandem solar cell structure TCO/TiO2/CH3NH3PbI3/PEDOT:PSS/c-Si(n)/c-Si(p)/c-SiBSF(p+)/Ag has open circuit voltage 1.56 V, short circuit current density 23.7mA/cm2, Fill factor is 84.76% and efficiency is 30.7% (after filtration of solar spectrum). The effect of thickness of silicon and perovskite layer on performance in tandem solar cell has also been studied. Page(s): 65-70 2022-12-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/61072 Title: Self-cleaning Technique: Working Mechanism, Utility in Textile Products and Existing Challenges Authors: Mishra, Anu Abstract: The concept of self-cleaning has immense applications in our day to day life. Self-cleaning ability of a product promises its unique selling preposition in the market and ensures its wide acceptability among its end users. Self cleaning materials have got their applications in industry like building construction, healthcare, aerospace, transport and textiles. The present research paper compiles the importance of self-cleaning property in perspectives of textiles. The mechanism of working of self cleaning materials on superhydrophobic surface has been discussed in length. The role of photocatalysts to impart self-cleaning ability in textiles has also been elaborated. In addition to this, methods of application of self cleaning materials on textiles and their existing challenges are also discussed. Page(s): 71-78 2022-12-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/61071 Title: Impact on awareness of E-waste and its hazards in society Authors: Shrivastri, Shweta; Choudhary, Shobhna Abstract: Many deadly environmental pollutions are polluting our earth today, due to which we are facing problems like climate change and health problems, another reason for this is also the change in technology and marketing trends, as well as our need to buy new items. This includes the tendency of many electronic devices to become obsolete and obsolete due to changes in time and technology, and most of these electrical and electronic equipment's (EEE) are discarded due to the end of their lives or non-working conditions. In such a scenario, it becomes a big question that what will happen to these old and unusable devices after all? In spite of this, we buy new electronic equipment, e-waste is one of the main problems of increasing waste as well as the most recent cause of environmental pollution this electronic waste. This waste is commonly known as "e-waste". In the year 2019, the world generated 53.6 metric tons (MT) of e-waste - an average of 7.3 kg per person. E-waste generation is projected to increase to 74.7 million tons in 2030 and 110 million tons in 2050 (GEMReport 2020) unless we revise our habits and practices of buying new equipment. In such a situation, the 3R policy will have to be adopted personally, so that we can reuse, recycle and reduce electrical and electronic equipment.The purpose of this research paper is to study how to make the public aware of the impact of e-waste on the environment and health, as well as to understand the relevant public knowledge and to effectively address the concern about e-waste. To help in creating awareness programs for This study focuses on the impact of awareness on e-waste and related problems. Page(s): 79-84 2022-12-01T00:00:00Z