http://hdl.handle.net/123456789/1434 Dissertation submitted by MS - 16 batch as part of their course Mon, 15 May 2023 09:26:04 GMT 2023-05-15T09:26:04Z http://hdl.handle.net/123456789/1884 Title: Design and fabrication of microwave circuits for proposed microwave hall measurements Authors: Saji, Jerin Abstract: Microwave circuits have a large application base, from biomedical fields to controlling quantum qubits inside a quantum computer. For the purpose of realising quantum systems and building a working quantum computer prototype, these circuits and devices needed to be thoroughly analysed, designed and precisely fabricated. The design and fabrication of these devices become tricky when dealing with high-frequency signals, and thus, this opens some exciting windows to study the effects of high-frequency signals on thin-film samples. The hall measurements are a well-known method to determine the carrier type, carrier concentration and mobility of a material. Measuring the DC hall on a sample requires putting point contacts, which destroys the sample for further use. This thesis tries to measure the Hall effect by a noninvasive method using high-frequency microwave signals. We designed and fabricated a homemade micro-strip circuit using photo-lithography and took measurements on nickel, germanium, graphene and bismuth selenide samples. The results obtained show that the hall field shows a linear increase with the applied magnetic field, and the phase is reversed when the magnetic field direction is reversed. Fri, 01 Apr 2022 00:00:00 GMT http://hdl.handle.net/123456789/1884 2022-04-01T00:00:00Z http://hdl.handle.net/123456789/1883 Title: The making of postcolonial governmentality Authors: Mishra, Ashirbad Abstract: This dissertation tries to understand the postcolonial modes of governmentalities by examining the forms of power-knowledge entanglement in the making of the Independent Indian state. We identify the Indian Statistical Institute and the formation of the National Sample Survey as our site of investigation where the infrastructure for a data-centric organization of public and governmental life in India finds its genesis. NSS subsequently became the guiding authority for every macroeconomic, welfare and industrial policy of the early postcolonial Indian state. By tracing a genealogy of enumeration and official statistics in colonial India and its role in the colonial mode of knowledge production, we attempt to understand the transformations of official data collection, organization and inferences from the colonial mode to a postcolonial mode. This forms the cornerstone of this thesis: the paradigmatic shift from colonial governmentality to postcolonial govern- mentality through ISI, NSS, and Planning Commissions within the context of democracy, decolonization and narratives of development. Fri, 01 Apr 2022 00:00:00 GMT http://hdl.handle.net/123456789/1883 2022-04-01T00:00:00Z http://hdl.handle.net/123456789/1882 Title: Interrogating everyday hindu nationalism Authors: Dangi,Abhishek Fri, 01 Apr 2022 00:00:00 GMT http://hdl.handle.net/123456789/1882 2022-04-01T00:00:00Z http://hdl.handle.net/123456789/1881 Title: Relax, just chill! Authors: Meena, Himanshu Abstract: Ectotherms are cold-blooded animals whose body temperature is controlled by external factors such as sunlight, hot rock, and so on. These creatures are unable to regulate their own body temperature, and their temperature varies according to their surroundings. As a result, we can conclude that temperature plays an essential role in the life cycle of ectotherms. Here, we adopt an intriguing technique for conducting research on the effects of temperature on ectotherms. "Rapid Cold Hardening" is the procedure. Rapid Cold Hardening, or RCH, is a phenotypic plasticity that permits ectotherms to rapidly acquire cold tolerance after only a few minutes of chilling. Drosophila was utilised as a model in my experiments to explore its responses to cold shock. It undergoes entire metamorphosis because it is a holometabolous insect, and insects that undergo complete metamorphosis have different life stages: egg, larval, pupa, and adult. Adults and larvae have a very different appearance. The active immature stages are referred to as larvae. For my experiments, I used the larval stage of the drosophila. The way they react to cold could reveal a lot about your fitness costs as well as the procedures that assist them prevent and recover from cold injury. This study looked at the survival and fitness metrics of adults of Drosophila melanogaster that had been cold stressed as larvae. Pre-treatment was given at 0°C for 2 hours and cold shock at various temperatures (-2°C, -5°C, 25 degrees Celsius of controls) for 1 hour. With a drop in temperature, I saw a considerable rise in mortality and development time. Pretreatment increased mortality and development time much more’re-treatment did not promote RCH response in the larval stage, contrary to predictions; instead, it had negative consequences. I believe it is primarily because to the high cost of hardening treatment at this vulnerable phase. Chilling temperatures deplete energy reserves, implying that systemic management of these reserves may be an important part of the processes that cope with environmental temperature fluctuations. Fri, 01 Apr 2022 00:00:00 GMT http://hdl.handle.net/123456789/1881 2022-04-01T00:00:00Z