Lakshminath Bezbaroa Central Library Digital Repository

Welcome to the Institutional Digital Repository of Lakshminath Bezbaroa Central Library.

  • This digital archive comprised of the Institutes' intellectual output.
  • It manages, preserves & makes available the academic works of faculty and research scholars.
  • It is established to facilitate deposit of digital content of scholarly or heritage nature.
  • Allowing academics & their departments to share & preserve contents in a managed environment.
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Recent Submissions

Selfhood and Narrative Agency: A study of Indian life-writing and fiction on physical disability and mental illness
(2024) Purkayastha, Shibashish
This dissertation examines the portrayal of selfhood and agency in Indian life-writing and fiction concerning physical disability and mental illness in the early twenty-first century. It argues that these narratives not only depict a transition from dependency to independence but also embrace the complexities and polyvocality inherent in disabled and mad identities. This nuanced portrayal contributes to a more diverse literary landscape. While protagonists grapple with challenges, they explore unconventional approaches to life, emphasizing the importance of sharing distressing experiences. The narratives serve as therapeutic counter-narratives, prioritize autonomy in healthcare decisions, and address systemic barriers. The examination of collaborative narration, embodied narration, and personal experiences of discrimination serves to elucidate the multifaceted nature of self-expression and resistance within the narratives of physical disability and mental illness. These explorations delve beyond mere storytelling techniques, revealing the intricate interplay between individual agency, societal structures, and the construction of identity within the selected literary works. The study draws from literary disability studies, mental illness and literary studies, life-writing, fiction, narrative theory, selfhood, and health humanities. It demonstrates how these narratives facilitate self-expression and challenge societal norms, particularly regarding family dynamics, gender roles, ethnicity, caste, and social class. Ultimately, the dissertation underscores the transformative power of storytelling in shaping individual and collective identities and contributes to ongoing dialogues in literary disability and mental health studies, health humanities, and narrative theory.
Enhanced energy storage performance of BaTiO3 and BiFeO3 - based dielectric ceramics and their thin films for capacitor applications
(2024) Balmuchu, Shashi Priya
The rising global demand for energy consumption for meeting the commercial and economic growth concerns for sustainable energy resources, generation, harvesting, and storage. The energy storage devices include electrochemical capacitors, batteries, fuel cells, and dielectric capacitors. Among these storage devices, dielectric ceramics offer inherently high power density and ultrafast charging/discharging time ranging from micro-nano to second time. This thesis mainly focuses on lead-free dielectric ceramics and thin films for energy storage applications. A detailed investigation of two systems, (1-x)BaTiO3-xBiFeO3 (BTBF) and (1-x)BaTiO3-xBi[Zn2/3(Nb0.85Ta0.85)1/3]O3 (BT-BZNT) from BaTiO3-BiMeO3 (where Me is trivalent or average trivalent metal ions) solid solution family in the bulk form is carried out. The ferroelectric studies for both compositions are analyzed to evaluate energy storage performance. The BTBF3 composition displayed a Wrec and η (%) of ⁓ 40 mJ/cm3 and 60.92%, respectively, at 25 kV/cm applied field, which is sufficiently lower as compared to other BaTiO3-BiMeO3 systems. A significant improvement in energy storage performance is observed in BT-BZNT ceramics. A remarkably high Wrec of 2.06 J/cm3 with an η (%) of 78% is achieved for BT-BZNT3 ceramics at an applied field of 180 kV/cm. The ultrahigh-energy efficiency of up to 96% is observed for higher concentrations in BT-BZNT ceramics. Herein, BT-BZNT3 and BT-BZNT4 ceramics exhibited a comparable energy storage performance at a lower applied field of 180 kV/cm, demonstrating the excellence of BT-BZNT ceramics over other BaTiO3-BiMeO3 family.
Studies on Energy and Environmental Applications of Ravenna Grass (Saccharum ravennae) Biomass
(2024) Dhara, Simons
The Ph.D. thesis focuses on the utilization of Saccharum ravennae grass as a biofuel source and for environmental applications. Bioethanol production involved optimizing sugar yields using enzymatic hydrolysis with various pretreatment methods, including CCD RSM for alkaline lignin extraction , which were targeted as the first two objectives of the thesis . Thereafter, the last two objectives of the thesis affirmed the utilization of the extracted lignin with the PSf membranes for Cr(VI), Pb 2+2+, and dye removal from
Brahmaputra River Basin: A Game Theoretic Approach to Cooperation and Benefit Sharing
(2024) Baruah, Tanushree
Freshwater is a critical natural capital that is non-substitutable at the interface of economy and environment. Globally, demographic and socioeconomic drivers, along with the impact of climate change, have created unprecedented water scarcity, with demand exceeding supply. Collaborative water management can strengthen resilience and cope with risks from imminent water crises, aiding the achievement of the Sustainable Development Goals (SDGs). However, management becomes increasingly complex for transboundary rivers, a global common good that flows without obeying borders. The complexity arises from the additional layer of political economy to the economy-environment interface, encompassing transboundary rivers. Transboundary interaction among power asymmetric riparians is influenced by overlapping state sovereignty and diverse strategic interests in river utilisation. Unilateral water interventions without internalising associated external costs strain international relations between nations. The non-cooperative behaviour exists because riparian nations equate transboundary negotiations with sovereignty bargains, interpreting lost autonomous control over the river. As the entire problem relates to water-sharing, an innovative principle called benefit sharing emphasises sharing the benefits derived from the water resource rather than the water itself. Despite hydro-political tensions, benefit sharing incentivises transboundary water cooperation as it overlooks sovereignty issues, producing win-win outcomes for riparians. This thesis focuses on the relatively under-researched transboundary river basin- the Brahmaputra River Basin (BRB). The mighty river that originates in China and transcends three South Asian countries, India, Bhutan, and Bangladesh, needs more institutionalised water cooperation. Although the basin has not faced an acute water crisis to date, growing and competing water interventions have been underway since the millennium to use the river as a power consolidation mechanism, particularly by China and India. This has intensified the vulnerability risks for the basin communities. Existing literature is silent on the economic and political factors driving the interaction between power asymmetric BRB riparians. Therefore, this thesis aims to examine the existing and evolving bilateral water interaction among the BRB riparians and the prospect of benefit sharing. It deploys the state-of-the-art analytical framework of game theory to analyse riparians’ strategic behaviour. Game theory is the science of rational decision-making for conceiving social situations among competing players and fits best to understand the economic and political dimensions of water management even without
Segmentation-based Approaches to Pre-operative and Intra-operative Brain Ultrasound Image Registration
(2024) Chel, Haradhan
The human brain is made of soft tissues that floats on cerebrospinal fluid (CSF), and it frequently shifts during a surgical process. The brain-shift prevents a neuro-navigation (NN) system from locating the diseased region. A brain ultrasound (BUS) imaging system is utilized to monitor the surgical procedure. Brain-shift can be corrected by registering the pre-operative brain ultrasound (pBUS) and the corresponding intra-operative brain ultrasound (iBUS) images. The similarity between the pBUS and the corresponding iBUS image is affected for a variety of reasons, which makes the registration difficult. This thesis developed three methods to extract similar regions in pBUS and iBUS images and register using these regions. The first method finds the common edge-rich regions from the registering image pair and is followed by the registration of those edge-rich regions through the minimization of the mean-squared registration error. The second method proposes a fast and fully automatic method for extracting the hyper-echoic(HE) regions from the registering image pairs. The patch-based approach makes the segmentation faster and robust to noise. The segmented HE regions are registered by minimizing the registration error. The third approach adopts a patch-based level-set strategy for segmenting three prominent HE regions namely, the longitudinal fissure, choroid plexus, tumor, and two anechoic regions namely, the ventricles and the resection cavity. A registration method is followed on the segmented image sections. Various gradient-based and heuristic optimizations are used for minimizing the mean-squared registration error during registration. Experiments were conducted on selected image pairs from the RESECT and the BITE datasets. For performance evaluation, the segmented ground truth images are prepared by annotating the boundaries of different regions in coordination with an expert radiologist. For comparing registration performance, common tagpoints are selected from the registering image pairs, and the improvement of mean target registration error (mTRE) after registration is analyzed. Experimental results demonstrate the superiority of the proposed segmentation-based approaches to the state-of-the-art methods.