Lakshminath Bezbaroa Central Library Digital Repository

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Now showing 1 - 5 of 26

Recent Submissions

Role of Mature Care Ethics in Addressing Bioethical Issues: A Critical Analysis
(2026)
Mukherjee, Upamita
In this thesis, I critically examine the moral issues surrounding three bioethical topics. Before attempting to do so, in the introduction part of this thesis, I outline some limitations of traditional moral theories and care ethics, and finally subscribe to the theory of mature care ethics as an analytical tool throughout this thesis. I subscribe to mature care ethics not as a critic of care ethics, but as its more comprehensive version. Mature care ethics has been developed as a normative moral theory by moral philosopher Tove Pettersen. This theory discusses a balanced approach of caring that helps us avoid the risks of an altruistic understanding of care. Subsequently, this thesis proceeds with the analysis of the positions of deontology, utilitarianism, and sometimes care ethics regarding these three bioethical issues: the vegetarianism and non-vegetarianism debate, voluntary active euthanasia of terminally ill patients, and organ transplantation for people with substance use disorder in the following chapters. Here, I argue that, as situations vary, we should make decisions based on their own weight. If we are strict about rules or always aim for the best possible outcomes, it will be morally problematic for us to make moral decisions in a given situation. Hence, from the perspective of mature care, I conclude that while saving a life is sometimes morally correct, sacrificing a life is not morally wrong. Mature care ethics does not demand that every life be saved — it demands that every decision be made with emotion and reason both; therefore, we never become a blind carer.
Machine Learning-Augmented DPSM Frameworks for Ultrasonic Field Estimation under Deterministic and Random Wavenumber Variations
(2026)
Thakur, Ayush
Ultrasonic field modelling near fluid–solid interfaces is essential for non-destructive testing and evaluation (NDT&E) and structural health monitoring (SHM). Conventional numerical methods, however, are computationally demanding for high-frequency, parametric and stochastic analyses. This thesis develops machine-learning-augmented and stochastic frameworks based on the distributed point source method (DPSM) for efficient and physically consistent ultrasonic field estimation. First, a Neural Green-Distributed Point Source Method (NG-DPSM) is developed using a physics-informed neural network (PINN), which learns the displacement Green’s function (GF) with the closed-form solution as its governing physics. Automatic differentiation provides the gradients needed for stress fields, eliminating rigorous analytical differentiation. NG-DPSM evaluates Green’s functions about sixty times faster than the conventional approach while closely matching DPSM results. Second, a Pix2Pix-based conditional generative adversarial network (cGAN), with a U-Net generator and a PatchGAN discriminator, is trained on DPSM-generated data to predict high-frequency wavefields in isotropic solids coupled with a fluid. Frequency, edge, perceptual and structural similarity index measure (SSIM) losses preserve physical and structural fidelity. The model translates 1 MHz fields into 5 MHz displacement and stress fields within seconds, with SSIM values of 0.86–0.96. Third, uncertainty in elastic constants is modelled by treating the P- and S-wavenumbers as random variables. Closed-form statistical moments of the GF and its gradients are propagated within DPSM to estimate the mean and standard deviation of ultrasonic fields, agreeing closely with Monte Carlo simulations while being 425–473 times faster. Together, these frameworks provide efficient, scalable and uncertainty-aware ultrasonic modelling tools for real-time monitoring and model updating in SHM.
Morphotectonic Analysis of the Brahmaputra River System
(2026)
Narayan, M Uma
UNDER EMBARGO
Post-Diagnosis Mental Health Trajectories among the Parents of Children with Developmental Disabilities
(2026)
Sharma, Sushmita
The present thesis examined the experiences of parents raising children with developmental disabilities in India through a sequential mixed-methods design comprising two studies. Study 1 used SPSS and AMOS software and employed Structural Equation Modeling (N=175) to test theoretical models grounded in Self-Determination theory (SDT), investigating the association between Basic Psychological Need Satisfaction and Frustration with parental burnout, life satisfaction, and post-traumatic growth (PTG). It also assessed the mediating role of autonomy-supportive parenting, controlling parenting, and commitment to parental identity, alongside the moderating roles of parenting styles. Results demonstrated that need satisfaction was significantly negatively associated with parental burnout and positively associated with life satisfaction and PTG. Need frustration showed an even stronger positive association with parental burnout, consistent with SDT’s dual-process model. Need specific analysis further revealed that competence satisfaction was the strongest protective factor against parental burnout, while relatedness satisfaction and frustration were the most robust predictors of PTG; autonomy satisfaction reported non-significant effects across all outcomes, potentially reflecting collectivist cultural norms. Mediation analyses indicated that commitment to parental identity fully mediated the relationships between both need satisfaction and need frustration with PTG, while parenting styles did not demonstrate consistent mediation. Serial mediation confirmed a significant sequential pathway from need satisfaction through autonomy-supportive parenting to commitment to parental identity, and ultimately to PTG. Moderation analysis revealed that both autonomy-supportive and controlling parenting amplified the detrimental effect of need frustration on parental burnout, with the protective effect of need satisfaction on parental burnout weakening at high levels of both parenting styles.
Effects of Ageing on Seismic Performance of Mid-Rise RC Flanged Wall–Frame Buildings
(2026)
Samanta, Nilanjan
UNDER EMBARGO