Digital Commons Network^™

Nonparametric Identification And Estimation Of Stochastic Frontier Models, Jun Cai

Dissertations - ALL

This dissertation studies nonparametric identication and estimation of stochastic frontiermodels. It is composed of three chapters. The rst chapter investigates the identication and estimation of a cross sectional stochastic frontier model with Laplacian errors and unknown variance, which is built on a nonparametric density deconvolution strategy. Chapter two studies a zero-ineciency stochastic frontier model utilizing a penalized sieve estimator, which allows flexible function forms and arbitrary distributions of ineciency. The third chapter explores identication and estimation of a nonparametric panel stochastic frontier model based on Kotlarski's Lemma and moments derived from conditional characteristic functions.

Examining The Mediational Role Of Writing Motivation In The Writing Development Of Elementary-Aged Students, Brittany Eggleston

Dissertations - ALL

Motivational variables, such as writing self-efficacy and writing attitudes, are not emphasized in writing frameworks for developing writers. The purpose of this research study was to extend the research literature on elementary-aged students’ writing development by examining the potential mediational role of writing self-efficacy and writing attitudes between foundational academic skills (e.g., handwriting, spelling, and executive functioning/working memory skills) and written performance. Measures of spelling, handwriting, executive function/working memory skills, writing self-efficacy, writing attitudes, and written expression were administered to 140 third-grade and fifth-grade students. In this correlational research study, a parallel mediational analysis was conducted to examine whether writing …

Natural And Synthetic Ligand-Binding Induce Different Pilin Assemblies In Vitro And Control P. Aeruginosa Bioactivities In Vivo, And Development Of Bacterial-Motility Enabled Binding Assays, Arizza Chiara Siwa Ibañez

Dissertations - ALL

Proteins found on bacterial cells surfaces are capable of sensing and transducing signals from the environment to elicit a biological response. Fibrous appendages formed by assembly of pilin proteins on P. aeruginosa are surface proteins that are necessary for host colonization, adhesion on abiotic surfaces, controlling motilities, formation of biofilm, horizontal gene transfer and virulence production of the bacterium. Upon contact with stimuli, pili appendages extend and retract on the cell surface, driven by the assembly and disassembly of pili at inner membrane of the bacteria cells. The dynamic response of this protein assembly is likely caused by a conformational …

Reinforcement Learning For Mobile Robot Collision Avoidance In Navigation Tasks, Zilong Jiao

Dissertations - ALL

Collision avoidance is fundamental for mobile robot navigation. In general, its solutions include: {\it map-based} and {\it mapless approaches.} In the map-based approach, robots pre-plan collision-free paths based on an environment map and follow their paths during navigation. On the other hand, the mapless approach requires robots to avoid collisions without referencing to an environment map. This thesis first studies the map-based approach for multiple robots to collectively build environment maps. In this study, a robot following a pre-planned path may encounter unexpected obstacles, such as other moving robots and obstacles inaccurately presented on an environment map. This motivates us …

Atmospheric Chemistry Of Outdoor And Indoor Environments: Physical And Chemical Characterization Of Urban Grime And Measurements Of Oxidants In Vehicle Cabins, Corey Richard Kroptavich

Dissertations - ALL

This work investigates chemistry in two distinct environments in urban atmospheres. The first is the coatings found on urban surfaces often referred to as urban grime. Urban grime may serve as an important medium for photochemical and heterogeneous reactions in cities. This study characterized the composition and physical state of urban grime collected from two American cities. Wavelength-resolved extinction spectra of urban grime samples were also analyzed to improve our understanding of urban grime’s role in photochemistry. The research showed that the grime from the American cities was similar in composition to previous studies conducted in Europe and Canada, but …

4d Printing Shape Memory Polymers For Biomedical Applications, Kathleen Pieri

Dissertations - ALL

The development of 3D printing techniques using shape-memory polymers (SMPs) hascreated potentials for creating dynamic, three-dimensional structures that can be produced rapidly and be customized for specific and complex architectures. These qualities have made 3D printing a popular fabrication method for future SMP parts and devices. While important information about is known about the effects of printing parameters on 3D printed SMPs, there remains a gap in the understanding of these parameters on fundamental shape memory properties. Understanding the shape memory behavior of the SMPs post-printing can implicate potential advantages or weaknesses in using these materials in biomedical applications. Furthermore, …

Model-Based Approach For Product Requirement Representation And Generation In Product Lifecycle Management, Omer Yaman

Dissertations - ALL

The requirement specification is an official documentation activity, which is a collection of certain information to specify the product and its life-cycle activities in terms of functions, features, performance, constraints, production, maintenance, disposal process, etc. It contains mainly two phases; product requirement generation and representation. Appropriate criteria for the product design and further life-cycle activities are determined based on the requirement specification as well as the interrelations of product requirements with other life-cycle information such as; materials, manufacturing, working environments, finance, and regulations. The determination of these criteria is normally error-prone. It is difficult to identify and maintain the completeness …

Wrinkling Patterns On Curved Surface With Gradient Curvature Under Compression, Xiaoxiao Zhang

Dissertations - ALL

This work focuses on understanding the wrinkling patterns on a curved surface, i.e., tori and cones, with varying curvatures and global deformation. By tuning the geometry confine-ment and material properties, we can control the surface morphologies in these systems which can potentially be applied to wide applications in bio-inspired devices, microfluidic, and optical.

First, we investigate the wrinkles on a tri-layer torus consisting of an expanding thin outer layer, an intermediate soft layer, and an inner core with a tunable shear modulus. This study is inspired by pattern formations and evolutions in developmental biology, such as follicle pattern formation during …

Combination Of Bonding, Bridging And Linking Social Capital In A Livelihood System: Nomadic Duck Herders Amid The Covid-19 Pandemic In South Sulawesi, Indonesia, Darmawan Salman, Kasmiyati Kasim, Asmita Ahmad, Nurhady Sirimorok

Forest and Society

Livelihood systems of nomadic duck herders make a unique study subject due to the livelihood assets, strategies, and outcomes they manage, which involve interactions with various actors that keep moving around. Social capital the duck herders build in their interaction with other actors, namely rice farmers, play an important role to face different vulnerability context, including those brought by the Covid-19 pandemic. This study aims to characterize components of bonding, bridging and linking social capital in the context of relationships between duck herders and other actors, and seeks to find the essential role of the combination of the three types …

Soil Seed Banks Of Tree Species From Natural Forests, Restoration Sites, And Abandoned Areas In Chiang Mai, Thailand, Patsavipich Rungrojtrakool, Pimonrat Tiansawat, Arunothai Jampeetong, Dia Panitnard Shannon, Sutthathorn Chairuangsri

Forest and Society

Soil seed banks have been used for investigation of natural regeneration of forests. In this study, we compared seed density and species composition of soil seed banks of trees among natural forests, restored forests of different ages, and abandoned agricultural land. The soil seed banks were collected from a natural forest (NF), 12-year-old and 17-year-old restoration sites (RF12y and RF17y), and 17-year-old abandoned site (AA) at Ban Mae Sa Mai, Chiang Mai, Thailand. A seedling emergence technique was used to assess seed density and species of emerged seedlings was identified. We found 5-8 tree species at each site. Seed densities …

Contribution Of Agroforestry Systems To Farmer Income In State Forest Areas: A Case Study Of Parungpanjang, Indonesia, Desmiwati Desmiwati, Thomas Oni Veriasa, Aam Aminah, Anggi Dian Safitri, Tri Astuti Wisudayati, Kresno Agus Hendarto, Hasan Royani, Kurniawati Hastuti Dewi, Sandy Nur Ikfal Raharjo, Dian Ratna Sari

Forest and Society

Agroforestry activities in Forest Areas with Special Purpose (FASP) have been implemented since 2000 in Parungpanjang, West Java, which was subsequently reinforced by the Decree of the Minister of Environment and Forestry concerning the Recognition and Protection of Forest Partnerships (Kulin KK) for the Harapan Sejahtera and Guna Bakti Forest Farmer Groups in 2019. This study investigates the contribution of agroforestry systems to farmer income using a household survey in the Parungpanjang Research Forest. The study aims to analyze: 1) the contribution of agroforestry to farmer income from a household structured income analysis; 2) factors of agroforestry that influence total …

Reconciling Community Land And State Forest Claims In Indonesia: A Case Study Of The Land Tenure Settlement Reconciliation Program In South Sumatra, M. Nazir Salim, Diah Retno Wulan, Sukmo Pinuji

Forest and Society

Longstanding land tenure claims in state forest by communities continues to pose a challenge to government institutions in Indonesia. Such conditions require institutions to develop mechanisms to assure communities of their rights in the state ideals of manifest justice and welfare. One government policy to reconcile these goals is the mechanism on Land Tenure Settlement Reconciliation in State Forests (Penyelesaian Penguasaan Tanah dalam Kawasan Hutan/PPTKH). This study aims to describe this policy in the context of fieldwork experience related to fundamental problems in the process of identification and settlement of land tenure claimed by communities in state forests. …

Forest - Related Culture And Contribution To Sustainable Development In The Northern Mountain Region In Vietnam, Thi Tan Huong Ngo, Thi Phuong Mai Nguyen, Thi Huong Duong, Thi Hue Ly

Forest and Society

The culture of communities living near/in forests indelibly interacts with forest ecosystems, both shaping and adapting to the natural environment. Forest-related cultural dimensions also provide benefits for local economies and social welfare. This study analyses the relationship between local culture and forests of the Tay and the Dao minorities and their contribution to sustainable development in Vo Nhai, a mountainous district in northern Vietnam. The study uses methods of a literature review, participant observation and qualitative interviews with local people. The strong embedded culture with forests that developed over many generations of Tay and Dao people was expressed through their …

High-Resolution Sampling Of A Broad Marine Life Size Spectrum Reveals Differing Size- And Composition-Based Associations With Physical Oceanographic Structure, Adam T. Greer, John C. Lehrter, Benjamin M. Binder, Aditya R. Nayak, Ranjoy Barua, Ana E. Rice, Jonathan H. Cohen, Malcolm N. Mcfarland, Alexis Hagemeyer, Nicole D. Stockley, Kevin M. Boswell, Igor Shulman, Sergio Derada, Bradley Penta

Faculty Publications

Observing multiple size classes of organisms, along with oceanographic properties and water mass origins, can improve our understanding of the drivers of aggregations, yet acquiring these measurements remains a fundamental challenge in biological oceanography. By deploying multiple biological sampling systems, from conventional bottle and net sampling to in situ imaging and acoustics, we describe the spatial patterns of different size classes of marine organisms (several microns to ∼10 cm) in relation to local and regional (m to km) physical oceanographic conditions on the Delaware continental shelf. The imaging and acoustic systems deployed included (in ascending order of target organism size) …

Work-Family Spillover And Depression: Are There Racial Differences Among Employed Women?, Ariane L. Rung, Evrim Oral, Edward S. Peters

School of Public Health Faculty Publications

The intersection of work and family life can be a source of burden (negative) and a source of growth (positive). Negative work-to-family and family-to-work spillover have been linked to poor mental health, while positive work-to-family and family-to-work spillover have been linked to improved health outcomes. Less is known about these relationships in racial subgroups. Louisiana, USA, has a large proportion of African Americans, providing a unique population in which to study these relationships. The objectives of this study were to examine, among a sample of women in southern Louisiana in 2017, levels of work-family spillover by race and how the …

Ypfs Lessons Learned Oral History Project: An Interview With Eric Kolchinsky, Eric Kolchinsky, Steven H. Kasoff, Matthew Lieber

Documents

Suggested Citation Form: Kolchinsky, Eric, 2020. “Lessons Learned Interview."Interview by Steve Kasoff and Matt Lieber. Yale Program on Financial Stability Lessons Learned Oral History Project. December 22, 2020. Transcript. https://ypfs.som.yale.edu/library/ypfs-lesson-learned-oral-history-project-interview-eric-kolchinsky

Maternal Communication At Menarche: Evaluating Direct And Indirect Effects On Age At First Sexual Intercourse In Young Adult Women, Jennifer Horne King

Dissertations - ALL

This study examines maternal communication at menarche and its effects on early sexual decision-making in young adult women. Drawing on principles from Bandura’s social cognitive learning theory and communication privacy management theory, I predicted that certain types of maternal communication at menarche would either promote or inhibit early sexual self-efficacy, with indirect effects on age at first sexual intercourse. I also predicted that maternal communication at menarche would vary in tone or content, depending on age at menarche, with mothers communicating less to daughters who reached the milestone early. A total of 175 sexually active females aged 18 to 26 …

The Er Stress/Upr Axis In Chronic Obstructive Pulmonary Disease And Idiopathic Pulmonary Fibrosis., Mahmoud Aghaei, Sanaz Dastghaib, Sajjad Aftabi, Mohamad-Reza Aghanoori, Javad Alizadeh, Pooneh Mokarram, Parvaneh Mehrbod, Milad Ashrafizadeh, Ali Zarrabi, Kielan Darcy Mcalinden, Mathew Suji Eapen, Sukhwinder Singh Sohal, Pawan Sharma, Amir A Zeki, Saeid Ghavami

Center for Translational Medicine Faculty Papers

Cellular protein homeostasis in the lungs is constantly disrupted by recurrent exposure to various external and internal stressors, which may cause considerable protein secretion pressure on the endoplasmic reticulum (ER), resulting in the survival and differentiation of these cell types to meet the increased functional demands. Cells are able to induce a highly conserved adaptive mechanism, known as the unfolded protein response (UPR), to manage such stresses. UPR dysregulation and ER stress are involved in numerous human illnesses, such as metabolic syndrome, fibrotic diseases, and neurodegeneration, and cancer. Therefore, effective and specific compounds targeting the UPR pathway are being considered …

Communication Modes During Romantic Dissolution: The Impact Of Attachment And Intimacy On Initiator Breakup Strategies, William Hoffman

Communication Studies Faculty Research

A majority of romantic pair-bonds will not remain together. Surprisingly, however, less is known about relationship dissolution compared with other stages of romantic relationships, such as initiation and maintenance. The present study addresses this gap by investigating breakup initiators’ communication strategies as outcomes for the individual’s attachment style and the emotional intimacy of a recent terminated romantic relationship. Participants (N = 174) completed a series of empirically reliable and valid Likert-scale measures to assess both predictors: (a) adult attachment and (b) emotional intimacy. Emotional intimacy was a significant predictor of each of the four breakup communication strategies, and adult attachment …

Recent Aerodynamic Performance Evaluation Of Commercial And Non-Commercial Vehicles, Shreyash Saxena, G. T. Mahesha, G. Srinivas

Open Access archive

The effect of aerodynamics of commercial and non-commercial are analyzed in this study and after analyzing it is founded that many researchers have not attempted much on the comparative study on two different types of commercial and non-commercial vehicle having a same turbulence model. Secondly, there is lack of numerical three dimensional aerodynamic flow analysis in the case of both commercial and non-commercial vehicles. Hence, there is requirement for numerically analyzing two commercial and non-commercial vehicles having the same turbulence model to better understand the aerodynamics of both commercial and non-commercial vehicles.

Quad Band Operated Microstrip Patch Antenna For Wimax Application, Arjun Sundaran, Sushobhan Joshi, Avinash Nidadavolu, Shweta Vincent

Open Access archive

The paper describes a light-weight monopole planar antenna with a rectangular radiating patch and a slotted ground plane for WiMAX (Worldwide Interoperability for Microwave Access) applications. WiMAX is a wireless broadband communication technology based around the IEEE 802.16 that provides point-to-multipoint wireless networking system and high-speed data across a wide range. The antenna designed for the aforementioned applications shows operation at 2.5 (lower WiMAX) / 3.7, 4.5 (middle WiMAX) / 5.5 (upper WiMAX) GHz with total bandwidth of about 110 MHz / 150 MHz / 160 MHz / 120 MHz. With its appealing characteristics, the planar monopole patch antenna meets …

Application Of Earned Value Method And Earned Schedule Method For A Residential Apartment, S. Vaibhava, B. Prakash Rao, Dheeraj Vishwanatha Shetty, Chandra Prakash

Open Access archive

Earned Schedule Management (ESM) gives an estimate of schedule and milestone achievement dates. Earned Value Management (EVM) assists to follow the project performance by giving the schedule variance, cost variance and their performance index. EVM &ESM helps the project manager to foresee cost and schedule for the real project. The objective of this study is to apply EVM & ESM to the real time residential apartment project which is upcoming in Bengaluru, Karnataka, India and then to compare the results of two deterministic forecasting methods EVM and ESM. The EVM and ESM parameters are generated by using the data procured …

A Microstrip Patch Antenna With Enhanced Bandwidth For Millimeter Wave 5g Application, Pooja Balachandran, Avinash Nidadavolu, Om Prakash Kumar, Shweta Vincent

Open Access archive

The cellular network of 5G works in the centimeter wave (3-30 GHz) and Millimeter-wave (30-300GHz). Here worldwide a vast amount bandwidth remains unused. A new microstrip antenna of dimension 10 10 1.6 mm3 has been designed and simulated using HFSS for Millimeter wave (MMW) applications, in this paper. The proposed antenna shows wide bandwidth, stable radiation patterns, and enhanced reflection coefficient at 24.5 GHz for possible 5G use. It shows impedance bandwidth of 2.05GHz(23-26 GHz) with a maximum gain of 6.32 dBi.

Finding The Missing Millions: Lessons From 10 Active Case Finding Interventions In High Tuberculosis Burden Countries, Tripti Pande, Nathaly Aguilera Vasquez, Danielle Cazabon, Jacob Creswell

Open Access archive

No abstract provided.

Utilization Of Social Media In Ethnic Identity Political Communication : Case Study Of Sundanese Ethnic Political Communication Regent Dedi Mulyadi In Political Development In Purwakarta Regency, West Java Province, Indonesia, 2008-2018, Asep Gunawan, Siti Karlinah Abdurachman, Cece Sobarna, Evie Ariadne Shinta Dewi

Library Philosophy and Practice (e-journal)

The reality of ethnic identity becomes an interesting phenomenon when used in political communication practices, especially in democratic government systems, because it can be a differentiator for its users in forming a political image or identity. Using a qualitative research method with a case study approach, this research succeeded in revealing that the attributes of political communication by Regent Dedi Mulyadi through verbal and nonverbal messages and his political communication strategy were the practice of managing impressions to form a certain political identity. To achieve this goal, the use of social media is an important political communication strategy. The construction …

Towards A Nuanced Understanding Of Emotional Infidelity: An Investigation Of Behavioral Exemplars And The Impact Of Ambiguity, Morgan Proulx

Theses - ALL

Infidelity is an especially severe relational transgression that can act as a predictor of negative outcomes. Though the word “severe” may seem to imply that we can expect a degree of clarity when considering whether a particular behavior qualifies as “infidelity”, thinking of infidelity behaviors in that way might be an oversimplification. Whereas researchers have had some success in predicting the outcomes of and responses to infidelity, our understanding of infidelity may be complicated by a lack of clear behavioral indices for some forms of infidelity, namely emotional infidelity. The present study explored the specific types of behaviors that participants …

Application Of Wavelet Transform To Endurance Time Analysis Method For Performance-Based Seismic Design, Mohammadhossein Mamaghani

Dissertations - ALL

Earthquakes occur quite frequently around the world, but the number of reliable recorded ground motion data for a given site is often limited. In addition, the use of present methodologies to modify existing earthquake records to match site conditions could change the relationship between the recorded earthquake characteristics and their actual physical attributes. The result is that these modified earthquakes could have qualities not quite the same as those of the real earthquakes. Instead of using scaling and spectral matching of real earthquakes, artificial earthquakes capable of mimicking both the physical conditions and qualities of real earthquakes should be generated …

Professional Development In Context: Investigating In-Service Development Programs For Syrian Teachers Of English As A Foreign Language During Times Of Military Conflict, Fadi Al-Issa

Dissertations - ALL

The purpose of this study is to research how teaching practices and in-service professional development of English language teachers’ in Syria have been affected during times of military conflict: what impact English language teachers in Syria perceive the professional development programs they are required to attend have on their teaching and the learning environments they provide for their students, and how this perceived impact relates to the country’s current military conflict; and to explore the ways that teachers can be assisted to enhance their in-service professional development in a country experiencing a military conflict. Thus, by probing these two issues, …

Examining Intentions To Seek Counseling Amongst African American Male College Students, Jordan P. Shannon

Dissertations - ALL

The roles of public stigma, self-stigma and mental health literacy have been found to be influential to the help-seeking process of college students. However, their particular influence has yet to be explored with African American male college students (AAMCS). The purpose of this dissertation is to explore whether public stigma, self-stigma and mental health literacy will significantly predict intentions to seek counseling amongst AAMCS. Research identifying factors for help-seeking amongst AAMCS have largely considered variables such as racial identity, self-concealment, cultural mistrust, Afrocentric values, and African Self-Consciousness. Whereas scholars perceive the help-seeking process of AAMCS with some salience to cultural …

Mindful Inquiry - A Deweyan Assessment Of Mindfulness And Education, David John Wolken

Dissertations - ALL

Mindfulness-based interventions are becoming an increasingly popular means for helpingstudents deal with the multidimensional challenges they face in contemporary educational settings. While potentially helpful, an uncritical employment of mindfulness in education can paradoxically function to reify the very neoliberal social conditions leading to the need for mindfulness in the first place. I assess this trend in educational theory and practice through John Dewey’s pragmatic philosophy. I show that the potential for both mindfulness and Dewey’s theory of mind and inquiry to support critical, sustainable social change is truncated by an uncritical retaining of the modern paradigm of mind that defines …