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DTSTART:20250101T000000
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DTSTART;TZID=Asia/Kolkata:20260928T133000
DTEND;TZID=Asia/Kolkata:20260928T144500
DTSTAMP:20260916T072703Z
CREATED:20260916T072703Z
LAST-MODIFIED:20260916T072703Z
UID:99207-1790602200-1790606700@www.ashoka.edu.in
SUMMARY:Physics Seminar
DESCRIPTION:Abstract: Spin-selective electron transmission makes chiral molecules a promising candidate for applications ranging from molecular spintronics to chemical and pharmaceutical technologies. By controlling the relative spin orientation of electrons\, it may be possible to influence electron-transfer processes and\, consequently\, spin-dependent chemical transformations. This phenomenon originates from the Chirality-Induced Spin Selectivity (CISS) effect\, in which electron transmission through a chiral molecular system depends on the electron spin orientation and the handedness of the molecule. We have demonstrated through several experimental approaches that electron transmission through chiral molecules adsorbed on metallic surfaces is spin selective. Furthermore\, the interplay between the metal-chiral molecule interface\, electron correlations\, molecular orientation\, and the direction of the applied magnetic field gives rise to characteristic magnetoresistance behavior.  \n\nMore recently\, my research has moved toward understanding CISS at the single-molecule level using mechanically controllable break junctions (MCBJ). In this approach\, a single chiral molecule is electrically connected between two metallic electrodes\, enabling direct measurement of electron transmission through an individual molecular junction. This provides a route to investigate the CISS effect in the molecular limit\, where effects arising from molecular structure\, electrode-molecule coupling\, transport channels\, and spin-dependent transmission can be examined more directly. Ultimately\, this work bridges the gap between ensemble measurements and single-molecule spin transport\, providing a platform for understanding the microscopic origin of CISS and for developing future single-molecule spin filters\, molecular spintronic devices\, and spin-sensitive nanoscale sensors. \nAbout the Speaker: Dr. Tapan Kumar Das is a Research Scientist at the Weizmann Institute of Science\, Israel. He received his Ph.D. from the Indian Institute of Technology Madras (IIT Madras)\, where his doctoral research focused on charge transport and optoelectronic properties of molecular and nanoscale systems. His current research lies at the interface of physics\, chemistry and\, biology\, with a particular focus on the Chirality-Induced Spin Selectivity (CISS) effect\, molecular spintronics\, and spin-dependent electron transport. His work explores spin-selective transport in chiral molecules\, biomolecules\, and materials using magnetoresistance\, Hall-effect measurements\, and\, more recently\, single-molecule mechanically controllable break-junction (MCBJ) techniques. His research aims to bridge ensemble and single-molecule spin transport toward applications in molecular spintronics\, quantum-enabled technologies\, and biosensing. He was part of the team recognized with the Royal Society of Chemistry’s 2022 Horizon Prize (Stephanie L Kwolek Award) for pioneering research on chiral materials for controlling electron and photon spin. \nWe look forward to your active participation.
URL:https://www.ashoka.edu.in/event/physics-seminar/
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DTSTART;TZID=Asia/Kolkata:20260928T134500
DTEND;TZID=Asia/Kolkata:20260928T144500
DTSTAMP:20260921T102408Z
CREATED:20260916T072704Z
LAST-MODIFIED:20260921T102408Z
UID:99209-1790603100-1790606700@www.ashoka.edu.in
SUMMARY:Psychology and Cognitive Sciences Seminar
DESCRIPTION:Abstract: The Job Demands–Resources (JD-R) model establishes that personal resources positively contribute towards employee well-being and work engagement. Their role attains particular significance in resource-constrained non-governmental organizations (NGOs) operating in developing economies\, where employees often balance the needs of grassroots beneficiaries with the expectations of international donor agencies. When organizational resources are limited\, the ability to understand and respond effectively to diverse social situations becomes especially valuable. In this regard\, this study examines social intelligence (SI) as a personal resource\, focusing on how employees’ ability to interpret social cues and adapt to different situations shape their perceptions of job demands and their use of relational support as a job resource. This perspective extends the JD-R model by highlighting how SI helps employees manage demanding work environments and remain engaged in their work. 218 employees from various Indian NGOs participated in this study. Data was gathered through self-administered questionnaires. The study employed Partial Least Squares Structural Equation Modeling (PLS-SEM) to analyze the data and test the proposed hypotheses regarding the impact of SI on perceptions of job demands and resources\, as well as its effects on psychological well-being and work engagement.The results demonstrate that SI as a personal resource significantly influences employees; perceptions of job demands and resources. Furthermore\, SI was found to have a direct and positive effect on psychological well-being and work engagement. These findings underscore the pivotal role of SI as a personal resource in enhancing the job outcomes of employees in the NGOs. This study contributes to the broader literature on organizational management\, especially within the context of NGOs in emerging economies. The findings suggest that by fostering SI among employees\, organizations can achieve improved job outcomes. The cross-sectional design of this study is a limitation\, emphasizing the need for longitudinal research to further validate these findings over time. Keywords: Social Intelligence\, Psychological Well-being\, Work Engagement\, Job Demands- Resources\, Nonprofit Organizational Management. \nAbout the Speaker: Dr. Sudipt Kumar is an Assistant Professor in the Organizational Behaviour and Human Resource Management area at the Indian Institute of Management Bodh Gaya. He has an interdisciplinary academic background\, with a PhD in Management from the Vinod Gupta School of Management\, Indian Institute of Technology Kharagpur\, and master’s degrees from the Tata Institute of Social Sciences\, Mumbai\, and the Indian Institute of Technology Bombay. Dr. Kumar has taught courses such as Talent Acquisition\, Learning and Development\, Research Methods\, and Social Entrepreneurship at both postgraduate and undergraduate levels. His research has been published in leading journals in Organizational Behaviour and Human Resource Management\, including Personnel Review\, Journal of Managerial Psychology\, Acta Psychologica among others. His recent publications examines social intelligence\, neurodiversity\, and talent acquisition in work organizations. Before joining IIM Bodh Gaya\, Dr. Kumar served at O. P. Jindal Global University\, where he held several academic and leadership positions. He was the Programme Director for Industrial and Organizational Psychology and also served as Assistant Dean for Internships and Placements at the Jindal Institute of Behavioural Sciences. \nWe look forward to your active participation.
URL:https://www.ashoka.edu.in/event/psychology-and-cognitive-sciences-seminar-2/
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