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Other Orienteering Problem Variants, Pieter Vansteenwegen, Aldy Gunawan Aug 2025

Other Orienteering Problem Variants, Pieter Vansteenwegen, Aldy Gunawan

Research Collection School Of Computing and Information Systems

In this chapter, different variants of routing problems with profits will be discussed. Based on what is available in literature, mostly variants of the orienteering problem will be discussed. A first variant considers capacity constraints, since these appear frequently in many practical applications. Next, multi-objective orienteering problems, explicitly considering different types of profits separately are discussed. Time-dependent and stochastic travel times are also relevant for most practical applications. These are considered together with time-dependent and stochastic profits. More and more routing problems are considered together with inventory management. For routing problems with profits, this leads to the inventory orienteering problem, …


From Storm To Strength: Katrina's Legacy Of Health, Healing, And Hope, Lsu Health Sciences Center - New Orleans Aug 2025

From Storm To Strength: Katrina's Legacy Of Health, Healing, And Hope, Lsu Health Sciences Center - New Orleans

LSUHSC Hurricane Katrina Archive: Reports & Presentations

This is the schedule for "From Storm to Strength" Katrina Symposium organized by LSU Health New Orleans to commemorate the 20th Anniversary of Hurricane Katrina.

A speaker panel session was held each day from Monday, August 24, 2025 to Thursday, August 28, 2025 for LSU Health faculty, staff and guests to share their remembrances of the hurricane and its impact on the school, on the City, and on their lives.


Shape Memory Behavior In Medium To High Entropy Shape Memory Alloys: Design, Prediction, And Experimental Analysis, Hatim Raji Aug 2025

Shape Memory Behavior In Medium To High Entropy Shape Memory Alloys: Design, Prediction, And Experimental Analysis, Hatim Raji

Theses and Dissertations

This dissertation provides a data-driven system integrating synthetic data generation and machine learning (ML) techniques to create multicomponent SMA compositions with specific transformation temperatures (TTs). Models were trained to represent the nonlinear dependencies influencing martensitic transformation behavior by using elemental, thermodynamic, and process-related aspects. The capacity of the ML models on medium entropy NiTiHfPd and high entropy NiTiHfZrCu systems accuracy was confirmed by experimental validation showing TTs closely matched with model outputs.


Simmel’S Reification In The Digital Era: The Commodification Of Emotional Relationships In Rent-A-Partner Services On Social Media, Juliana Pramesti Aug 2025

Simmel’S Reification In The Digital Era: The Commodification Of Emotional Relationships In Rent-A-Partner Services On Social Media, Juliana Pramesti

Masyarakat: Jurnal Sosiologi

This study examines the commodification of emotional relationships in Indonesia through the rise of “rent-a-partner” services on social media platforms such as Instagram and TikTok. Existing scholarship on digital intimacy has largely focused on Western and East Asian contexts, particularly dating applications, offering limited insight into how commodified intimacy operates in non-Western settings shaped by distinct socio-cultural and moral frameworks. Addressing this gap, the study draws on Georg Simmel’s concept of reification to analyze how emotional intimacy is transformed into purchasable service packages within platform-mediated environments. Using a qualitative approach that combines netnographic observation and in-depth interviews, the study demonstrates …


A Cultural Mapping Of Local Knowledge For Flood And Landslide Mitigation In The Sendi Community, Mojokerto, East Java, Ahmad Mujahid Arrozy Arz, Abyoso Romadhoni Wicaksono Arw, Kusuma Sabrina Wardhani Skw, Lora Septrianda Putri Aug 2025

A Cultural Mapping Of Local Knowledge For Flood And Landslide Mitigation In The Sendi Community, Mojokerto, East Java, Ahmad Mujahid Arrozy Arz, Abyoso Romadhoni Wicaksono Arw, Kusuma Sabrina Wardhani Skw, Lora Septrianda Putri

Masyarakat: Jurnal Sosiologi

This article investigated the irrigation sustainability and landslide prevention in the Sendi community, Mojokerto, East Java, by applying a cultural mapping approach to examine everyday practices through which local knowledge was enacted and produced, while linking the analysis to broader structural formations. The approach informed a participatory data collection process, that is also designed to protect the intangible cultural heritage of the community. The findings demonstrated how everyday practices function as an integral component of flood and landslide mitigation. This knowledge has been passed down through community archives since 1915 and included practices, such as planting local crops (bamboos and …


Readiness Of Universitas Indonesia To Be An Inclusive Campus For People With Disabilities, Dumilah Ayuningtyas, Tri Auri Putri Ayuningtyas, Anita Pebrina Lubis, Anindya Naila Sabahat, Ratih Oktarina, Afaf Jauhar Aug 2025

Readiness Of Universitas Indonesia To Be An Inclusive Campus For People With Disabilities, Dumilah Ayuningtyas, Tri Auri Putri Ayuningtyas, Anita Pebrina Lubis, Anindya Naila Sabahat, Ratih Oktarina, Afaf Jauhar

Masyarakat: Jurnal Sosiologi

Ensuring equal education rights remains a challenge in Indonesia, despite constitutional mandates and the global commitment to “no one left behind.” The Disability Participation Rate remains low; in 2023, only 21.03% of individuals aged 19–23 were included. This reflects, among other factors, the limited preparedness of educational institutions. This study evaluates Universitas Indonesia’s readiness to develop inclusive education for persons with physical, sensory, mental, and intellectual disabilities. Using the capability approach, it assesses whether institutional resources can be translated into capability-enhancing conditions for students with disabilities. The study draws on literature review, targeted document searches, SWOT analysis, IFE-EFE matrices, and …


Central Halmahera In Power Relations, Development, And Environmental Crisis, Herman Usman Aug 2025

Central Halmahera In Power Relations, Development, And Environmental Crisis, Herman Usman

Masyarakat: Jurnal Sosiologi

Abstract This paper analyzes the relationship between power relations, development, and environmental crisis in Central Halmahera, North Maluku, a region that has undergone socio-ecological changes due to the expansion of extractive industries, especially nickel mining. Such development is controlled by state actors and corporations, creating unequal power relations in which local communities are often marginalized. This development model based on natural resource extraction resulting in ecosystem degradation, water pollution, and the loss of living space for indigenous peoples and coastal communities. This paper uses the approaches of political ecology and the sociology of development, to examine how the state facilitates …


Greening The Virtual: An Interdisciplinary Narrative Review On The Environmental Sustainability Of The Metaverse, Mousa Al-Kfairy Aug 2025

Greening The Virtual: An Interdisciplinary Narrative Review On The Environmental Sustainability Of The Metaverse, Mousa Al-Kfairy

All Works

As the Metaverse continues to evolve as a transformative digital ecosystem, its environmental implications remain insufficiently examined within academic discourse. Despite growing interest in its technological and societal impacts, there is a lack of comprehensive evaluations that synthesize existing knowledge on its sustainability potential. This interdisciplinary narrative review addresses this gap by critically exploring how Metaverse technologies intersect with environmental sustainability across key sectors, including education, healthcare, tourism, e-commerce, manufacturing, and urban development. Employing a narrative review methodology informed by a systematic selection of scholarly and industry sources, the study consolidates current practices, emerging opportunities, and notable trade-offs. While the …


Properties Of A Class Of Analytic Functions Associated With Exponentially Convex Functions, K. R. Karthikeyan, Elangho Umadevi, G. Thirupathi, Dharmaraj Mohankumar Aug 2025

Properties Of A Class Of Analytic Functions Associated With Exponentially Convex Functions, K. R. Karthikeyan, Elangho Umadevi, G. Thirupathi, Dharmaraj Mohankumar

All Works

Studies in univalent function theory comprising the exponential of differential characterizations are rarely considered. The prominent study in this direction is the study of so-called α-exponentially convex functions. Here we study a class of analytic functions which satisfy an analytic characterization influenced by the definition of the multiplicative derivative and α-exponentially convex functions. Integral representation and coefficient inequalities of the defined function class are the main results of the paper.


Project Choices: An Experimental Serious Video Game For Performance-Based Risk Assessment, Rachel Bomysoad Aug 2025

Project Choices: An Experimental Serious Video Game For Performance-Based Risk Assessment, Rachel Bomysoad

Theses, Dissertations and Culminating Projects

Risk assessment for future criminal conduct currently relies on evaluator ratings or self-report measures, with imperfect predictive utility. A new serious (clinical) video game, Project Choices, was developed for assessment and treatment purposes with persons involved with the criminal legal system. Project Choices offers performance-based measurement of individuals’ responses to realistic scenarios relevant to overall criminogenic risk and individual risk factors. The current study aimed to pilot test the newest version of Project Choices (Version 2) using a sample of university students (N = 100), examining gameplay performance metrics (number of risky decisions overall and within individual risk domains) for …


An Examination Of The Lived Experiences Of Community College Students Of Color Who Utilize On-Campus Food Pantries, Maria Luisa Marte Aug 2025

An Examination Of The Lived Experiences Of Community College Students Of Color Who Utilize On-Campus Food Pantries, Maria Luisa Marte

Theses, Dissertations and Culminating Projects

In this dissertation, I present the findings of a descriptive phenomenological study I conducted focused on examining the experiences of community college students of color who utilize on-campus food pantries, aiming to understand how these resources impact their well-being. Through in-depth interviews, two central themes emerged. The first theme, Introduction to the On-Campus Food Pantry, highlights the accessibility of the service, with participants emphasizing the simplicity and efficiency of the registration process as a key factor in their initial engagement. The second theme, Experiences Using the Pantry, reveals that students found the pantry environment to be welcoming and non-stigmatizing, fostering …


Electrophysiological Markers Of Emotion Dysregulation In Autistic Youth, Rachel G. Mcdonald Aug 2025

Electrophysiological Markers Of Emotion Dysregulation In Autistic Youth, Rachel G. Mcdonald

Theses, Dissertations and Culminating Projects

Emotion dysregulation (ED) is a transdiagnostic mechanism that is conceptualized as difficultly regulating emotions and deploying appropriate regulation strategies in response to environmental stimuli. Meta-analyses suggest that autistic people, across the lifespan, experience more severe ED as compared to both neurotypical people and those with mental health conditions. Despite elevated risk and evidence linking ED to disruptions in neural mechanisms, no studies to date have examined neural markers of ED in autistic populations. The current project uses multi-method and multi-informant measurement to examine similarities and differences in neural mechanisms of ED in autistic and non-autistic populations. Forty-four youth aged 11—17 …


Seeing Students For Part Of Who They Are: High School Counselors' Experiences Broaching, Jessica M. Miserentino Aug 2025

Seeing Students For Part Of Who They Are: High School Counselors' Experiences Broaching, Jessica M. Miserentino

Theses, Dissertations and Culminating Projects

Broaching is raising issues of race, ethnicity, and culture (REC) in the counseling setting. Day-Vines and colleagues (2007) introduced this skill that involves counselors bringing topics of identity into the counseling space intentionally. This phenomenological study, guided by intersectionality, aimed to explore the experiences of high school counselors broaching REC. This study provided a further understanding and definition of broaching. Five main themes emerged to describe their experiences: 1) What is Broaching? 2) Broaching Strategies, 3) Broaching with Students and Various Stakeholders, 4) Systems of Power Impact Broaching, and 5) Professional Trajectory, Training, and Counselor Identity Impact Broaching. The findings …


Mind Mentor, The Workplace Mental Health Navigator: Evaluating The Utility Of A Self-Paced Web-Based Mental Health Awareness Training For Supervisors, Lauren Offermann Aug 2025

Mind Mentor, The Workplace Mental Health Navigator: Evaluating The Utility Of A Self-Paced Web-Based Mental Health Awareness Training For Supervisors, Lauren Offermann

Theses, Dissertations and Culminating Projects

The growing prevalence of mental health challenges in the workplace – such as anxiety and depression, burnout, suicide, and substance abuse – has increased demand for evidence-based supervisor training programs that promote psychological well-being. This study evaluated the effectiveness of Mind Mentor: The Workplace Mental Health Navigator, a 1.5-hour, web-based, self-paced adaptation of the Mental Health Awareness Training (MHAT; Dimoff, 2016) for supervisors. The training aimed to enhance mental health knowledge, awareness, self-efficacy, and supportive behaviors among U.S.-based supervisors with at least one direct report. Using a pre/post/follow-up design (baseline N = 51, immediate post-test N = 35, and 4-week …


A Collaborative Teaching Approach: Teaching Emergent Bilinguals In Higher Education, Erika Oliveros Aug 2025

A Collaborative Teaching Approach: Teaching Emergent Bilinguals In Higher Education, Erika Oliveros

Theses, Dissertations and Culminating Projects

This dissertation examines the collaboration between two college instructors, one in writing and one in psychology, to enhance support for emergent bilinguals at a private university in the northeastern United States. While collaboration among educators is widely encouraged in K–12 settings, it is far less common and studied in higher education, particularly in relation to language-minoritized students. Through an action research model, this study examines how our informal exchanges evolved into a more intentional and reflective collaboration over time. Grounded in the frameworks of translanguaging (García, 2009) and community cultural wealth (Yosso, 2005), the study traces the evolution of our …


"It's A Calling That Won't Let You Rest": The Experiences Of Counselor Educators Of Color Who Teach Social Justice, Sunanda M. Sharma Aug 2025

"It's A Calling That Won't Let You Rest": The Experiences Of Counselor Educators Of Color Who Teach Social Justice, Sunanda M. Sharma

Theses, Dissertations and Culminating Projects

Social justice advocacy has been described as a foundational ethical duty for all professional counselors (American Counseling Association, 2014). Counselor educators of color (CEOCs) have advocated for the advancement of multiculturalism and social justice in counseling (Sue et al., 1992; Vera & Speight, 2003). However, their lived experiences are not well-accounted for in the counseling literature. Grounded in critical race theory (CRT) (Delgado & Stefancic, 2017), this phenomenological study sought to explore the lived experiences of CEOCs who teach students to engage in systemic social justice advocacy (SSJA). Eleven participants described the essence of their experiences and four themes emerged …


Not Just A White People's Book Club: The Participatory Action Research Of An Educator Collaborative, Jessica E. Smedley Aug 2025

Not Just A White People's Book Club: The Participatory Action Research Of An Educator Collaborative, Jessica E. Smedley

Theses, Dissertations and Culminating Projects

This participatory action research (PAR) study investigated the learning and action of a racial and social justice book club composed of educators within a public school district. Over several years, the group engaged in collaborative cycles of inquiry, reflection, and systemic action to deepen understanding of racism, power, and equity in education. Framed by Bronfenbrenner’s Ecological Systems Theory, Relational-Cultural Theory, and Transformative Learning Theory, this study explored how learning in community supported both personal and collective transformation. Findings highlight that the book club functioned as a relational and intellectual space where vulnerability, critical reflection, and mutual accountability fostered growth-fostering relationships …


The Cost Of Strength: Navigating Systemic Racism And The Strong Black Woman Stereotype In The Workplace, Krystle M. Davis Aug 2025

The Cost Of Strength: Navigating Systemic Racism And The Strong Black Woman Stereotype In The Workplace, Krystle M. Davis

Theses, Dissertations and Culminating Projects

This research defined and explored the lived experiences of Black women in leadership and the role of systemic racism on the performance of the strong Black woman stereotype in the workplace. Grounded in Black feminist thought, epistemology, and phenomenology, this qualitative study seeks to deepen understanding the lived experiences of Black women. This manuscript-style dissertation comprises two studies: Study 1 consisted of nine participants who contributed through Sista Circle focus groups and Study 2 consisted of fourteen participants who engaged in semi-structured interviews to defined and examined their workplace experiences. Situated at the intersection of race and gender, this research …


Ocean-Ice Sheet Interactions During Super-Interglacial Mis 31: Comparison Of Rock Magnetic Records From The Scotia Sea (59.1°S) And Fram Strait (76.5°N), Olga Libman-Roshal Aug 2025

Ocean-Ice Sheet Interactions During Super-Interglacial Mis 31: Comparison Of Rock Magnetic Records From The Scotia Sea (59.1°S) And Fram Strait (76.5°N), Olga Libman-Roshal

Theses, Dissertations and Culminating Projects

The mid-Pleistocene transition (MPT) was a period spanning ~1.2-0.7 Ma when glacial-interglacial cyclicity changed from 41 kyr obliquity paced to 100 kyr eccentricity paced cycles with increased glacial-interglacial contrast post-MPT. Marine Isotope Stage (MIS) 31 was a “super-interglacial” within the MPT and occurred in the recent geological past (1.08-1.06 Ma). During MIS 31, the tectonic configuration resembled the present day, but Earth’s orbital parameters were marked by maximum values of eccentricity and obliquity while atmospheric CO2 remained at pre-industrial levels (below 280 ppm). MIS 31 therefore offers a valuable baseline for testing the impacts of modern anthropogenic CO2 levels combined …


The Effects Of Different Volume-Load On Sprint And Change Of Direction Performance, Damar K. Bobb Aug 2025

The Effects Of Different Volume-Load On Sprint And Change Of Direction Performance, Damar K. Bobb

Electronic Theses and Dissertations

This study was designed to compare the effects of two different strength training protocols on sprint and change of direction (COD) performance in recreationally trained athletes. Participants were evaluated on maximal dynamic (1RM squat) and isometric (IMTP) strength, speed (30m sprint), and COD (5-0-5 test). The participants were divided into two groups (Low volume-heavy load group [LV], High volume-moderate load high-intensity endurance (HIE) group [HV]) after initial testing, for a 4-week training intervention using traditional and weightlifting derivative lifts. The training consisted of 5 sessions per week (3 sessions resistance training [RT], each about 40-50 mins; 2 sessions sprint & …


In A Safe-Space Of Her Own: Alice's Journey Through A Traumatized Wonderland To Find Attunement And Recovery, Cheston A. Axton Aug 2025

In A Safe-Space Of Her Own: Alice's Journey Through A Traumatized Wonderland To Find Attunement And Recovery, Cheston A. Axton

Electronic Theses and Dissertations

Throughout Alice’s Adventures in Wonderland/Through the Looking-Glass’s 160-year existence, Lewis Carroll’s seven-year-old protagonist has experienced many changes and alterations. With an ever-growing pop culture interest, Alice’s original narrative has undergone numerous adaptations, with each new variation diving deeper into the impact of trauma on Wonderland.

This thesis continues this existing discourse by examining Wonderland’s capacity to facilitate recovery in the aftermath of severe trauma. Through this research, the traumatic experiences of Alice, from Christina Henry’s The Chronicles of Alice: Alice and American McGee’s Alice: Madness Returns, are examined concerning their effect(s) on her construction of Wonderland, as …


Examining The Lived Experiences Of International Students At East Tennessee State University, John The Baptist Anodjo Aug 2025

Examining The Lived Experiences Of International Students At East Tennessee State University, John The Baptist Anodjo

Electronic Theses and Dissertations

This research investigates the lived experiences of international students at East Tennessee State University (ETSU), specifically examining how they navigate social, academic, and structural challenges. Through in-depth interviews with 20 international students from a variety of nationalities, I analyzed issues related to legal status, housing, food insecurity, healthcare, and social integration. I found that students encounter barriers due to immigration policies, financial constraints, and limited access to essential resources. Additionally, international students benefit significantly from support provided by campus services, community organizations, and their social networks, which play a vital role in their adjustment process. While institutional resources are beneficial …


Isolation And Characterization Of Siderophore(S) From Pseudomonas Mosselii, Casey J. Stophel Aug 2025

Isolation And Characterization Of Siderophore(S) From Pseudomonas Mosselii, Casey J. Stophel

Electronic Theses and Dissertations

Iron is essential for growth of most microorganisms. It functions as an important cofactor in many important biological processes. However, iron found in soil is rendered insoluble and unavailable to microorganisms for use. To overcome this, many bacterial species produce siderophores, a small organic molecule that has high affinity for iron. Siderophores allow for bacterial cells to obtain otherwise insoluble iron. Pseudomonas mosselii, a Gram negative bacterium, was isolated from a local soil sample. P. mosselii was found to produce siderophore(s) under iron restricted environment, however, they have not been characterized. Therefore, it was of interest to isolate, purify and …


Give Me A Break: Exploring The Use Of A Reset Room On Secondary School Students And Resilient Practices In Tennessee, Alex White Aug 2025

Give Me A Break: Exploring The Use Of A Reset Room On Secondary School Students And Resilient Practices In Tennessee, Alex White

Electronic Theses and Dissertations

The culmination of toxic stress and social-emotional instability can result in significant challenges for students. Incorporating an appropriate response to address the social-emotional needs of students must be a priority if schools seek to see improvements in attendance, discipline, and ultimately academic success. Resilient middle and high schools recognized the need to create innovative spaces for students to learn how to self-regulate challenging emotions during the school day. The purpose of this quantitative research study was to investigate the relationship between chronic absenteeism, office disciplinary referrals, and the use of Resilient Schools Reset Rooms in middle and high schools from …


Electrochemical And Electrocatalytic Properties Of Screen-Printable Carbon Inks Featuring Pyridinic Nitrogen-Containing Polymeric Binder, Albert Sam Junior Aug 2025

Electrochemical And Electrocatalytic Properties Of Screen-Printable Carbon Inks Featuring Pyridinic Nitrogen-Containing Polymeric Binder, Albert Sam Junior

Electronic Theses and Dissertations

Screen-printable conductive inks have been widely applied to prepare electrodes for electrochemical sensing. These inks generally consist of conductive metal or carbon particles, solvents, and polymeric binders. Low-cost, carbon-based, screen-printable conductive inks are especially popular. However, screen-printed carbon electrodes (SPCEs) must often be modified after they are printed to impart the necessary characteristics (e.g., sensitivity, selectivity, stability) for the desired application. For example, nitrogen-doping of SPCEs, especially in ways that introduce pyridinic or pyrrolic nitrogen species, can impart electrocatalytic properties towards reduction of O2, H2O2, and CO2. While our previous work done …


Host-Virus Interaction Dynamics Using Sulfolobus Spindle-Shaped Virus And Host Sulfolobales System, Yeasin Ahmed Aug 2025

Host-Virus Interaction Dynamics Using Sulfolobus Spindle-Shaped Virus And Host Sulfolobales System, Yeasin Ahmed

Graduate Theses and Dissertations

The Sulfolobus Spindle-shaped virus (SSV) is among the most studied archaeal viruses, particularly in extreme environments. This virus predominantly infects multiple Crenarchaea from the Sulfolobaceae family. These hosts thrive in extreme environmental conditions, such as sulfuric hot springs, with a pH of 2 to 4 and a temperature of 76-80˚C. Sulfolobales exhibit a wide geographical distribution across volcanic hot springs. The Sulfolobus Spindle-shaped Virus (SSV), encompassing strains such as SSV1 and SSV8, employs a non-lytic replication strategy in hosts belonging to the order Sulfolobales. The SSV-Sulfolobales system can be cultured in liquid and gellan gum solid media. A comprehensive study …


Exercising Sovereignty In The Theater Of Court: How Performative Punishments Has Substitute Law Implementation In The Islamic Republic Of Iran, Nina Maziar Aug 2025

Exercising Sovereignty In The Theater Of Court: How Performative Punishments Has Substitute Law Implementation In The Islamic Republic Of Iran, Nina Maziar

Graduate Theses and Dissertations

Abstract Legality is a modern infrastructure, but when it is combined with the jurisprudence, which is very interpretive and subjective, an amorphous content is merged, which can be shaped for utilitarian purposes; and this is how the arbitrary legal system of Islamic Republic is staged. This unshaped legal system, courts/trials and penal codes, especially political charges are ambiguous contents, baffling the mindsets. This unclear setting is deterministically vague to scare the victim, and the audience with the stagecraft of the court. Sovereignty is defined both in the international affairs regarding the capability of one state ruling a country, but it …


How To Do Things With Little Talking Tubes: Nonideal Speech Acts In The Digital Age, Anthony Holdier Aug 2025

How To Do Things With Little Talking Tubes: Nonideal Speech Acts In The Digital Age, Anthony Holdier

Graduate Theses and Dissertations

In this work, I develop a view about what it means to share a social or conversational context with others, as well as what is normatively entailed by doing so. Working from a broadly Austinian perspective about the moral foundations of language use and how we use words to position ourselves within social space, as well as from a generally Stalnakerian social ontology (demarcating groups by dint of aligned or overlapping sets of commitments), I present three papers demonstrating how nonidealized, ordinary language philosophy can make sense of complex, real-world phenomena. Through analyses of heretical utterances, context collapse, and chatbot …


Growth And Characterization Of Thin Film Gase On Si(111) And Sio2/Si(001) Substrates By Molecular Beam Epitaxy, Christopher John Hocevar Aug 2025

Growth And Characterization Of Thin Film Gase On Si(111) And Sio2/Si(001) Substrates By Molecular Beam Epitaxy, Christopher John Hocevar

Graduate Theses and Dissertations

Gallium selenide (GaSe) is a thin-film semiconducting material with promising optoelectronic properties, including a tunable bandgap, high photosensitivity, and atomic-layer scalability. These characteristics make it suitable for devices such as photodiodes, FETs, MOSFETs, Hall effect sensors, and p–n diodes. In this study, GaSe thin films were grown on SiO2 and Si(111)-7×7 substrates using molecular beam epitaxy (MBE) to compare growth behavior across different substrates. The films were characterized using Raman spectroscopy, X-ray diffraction (XRD), atomic force microscopy (AFM), photoluminescence (PL) spectroscopy, and reflection high-energy electron diffraction (RHEED). RHEED confirmed the 7×7 reconstruction of the Si(111) surface and the amorphous nature …


Synthesis, Structural Characterization And Optical Studies Of Silver-Indium-(Zinc)-Chalcogenide Fluorescent Quantum Dots, Sujal Acharya Aug 2025

Synthesis, Structural Characterization And Optical Studies Of Silver-Indium-(Zinc)-Chalcogenide Fluorescent Quantum Dots, Sujal Acharya

Graduate Theses and Dissertations

Developing a non-toxic, high-performance fluorescent nanomaterial is crucial for overcoming the environmental and health restrictions of current cadmium, and lead based quantum dots (QDs), which limit the application of quantum dots in optoelectronics and bioimaging. In this thesis, we synthesized environmentally friendly AgInS2 QDs by a colloidal method, systematically altering the In/Ag precursor ratio from 2 to 6 to study the impact on their optical and photophysical properties. Our goals were to find the optimal stoichiometry for maximum quantum efficiency and stability. We also investigated further improving optical and photophysical properties through shelling with ZnS. The emission spectra appeared broad, …