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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
431

Mexican-Origin Adolescents in Latino Neighborhoods: A Prospective and Mixed Methods Approach

January 2020 (has links)
abstract: Neighborhoods are important aspects of the adolescent and family ecology. Cultural developmental perspectives posit that neighborhood environments contain both promoting and inhibiting characteristics for ethnic-racial minoritized populations (García Coll et al., 1996). Historically, neighborhood researchers have approached Latino neighborhoods from a deficit perspective. Thus, there is limited research about how Latino neighborhoods support Latino youth development and family processes. In my dissertation, I examine both the promoting and inhibiting aspects of Latino identified neighborhoods for adolescent development. In study 1, I prospectively examined a model in which Mexican-origin parents’ perceptions of social and cultural resources in neighborhoods may support parents to engage in higher levels of cultural socialization and, in turn, promote adolescents’ ethnic-racial identity (ERI). Findings suggest neighborhood social and cultural cohesion in late childhood promoted middle adolescents’ ERI affirmation via intermediate increases in maternal cultural socialization. Similar patterns were observed for ERI resolution, but only for adolescents whose mothers were born in the United States. Findings have critical implications for how neighborhoods support parents’ cultural socialization practices and adolescents’ ERI. In study 2, I used a convergent mixed methods research design to compare and contrast researchers’ neighborhood assessments collected using systematic social observations (e.g., physical disorder, sociocultural symbols) with adolescents’ qualitative neighborhood assessments collected by semi-structured interviews with Mexican-origin adolescents. Using quantitative methods, I found that researchers observed varying degrees of physical disorder, physical decay, street safety, and sociocultural symbols across adolescents’ neighborhood environments. Using qualitative methods, I found that adolescents observed these same neighborhood features about half the time, but also that they often layered additional meaning on top of distinct neighborhood features. Using mixed methods I found that, in the context of high spatial concordance, there was a high degree of overlap between researchers and adolescents in terms of agreement on the presence of physical disorder, physical decay, street safety, and sociocultural symbols. Lastly, adolescents often expanded upon these neighborhood environmental features, especially with references to positive and negative affect and resources. Overall, findings from study 2 underscore the importance using mixed methods to address the shared and unique aspects of researchers’ objectivity and adolescents’ phenomenology. / Dissertation/Thesis / Doctoral Dissertation Family and Human Development 2020
432

The Impact of Sense of Place : A qualitative case study on youth crime in Teleborg Växjö

Mohamed, Mohamed Ali January 2020 (has links)
Youth crime is a current topic in the news and seems to be a serious challenge for several municipalities in Sweden. Therefore, this study investigated the increasing youth crime in Växjö municipality, especially the Teleborg centrum area. The study focused on the role that sense of place plays in relation to youth crime. The selected research method is a qualitative method and semi-structured interviews. Thirteen interviews were conducted and categorized into three categories: one youths who lives near the area Teleborg center, two residents in the area and three Växjö municipality workers, and other relevant individuals. The collected material was analyzed with the help of the concept of sense of place presented in the literature review and the idea of neighborhood decay, as well as Travis Hirschi's theory of social bonds. This study's findings show youth who live near Teleborg center have strong bonds concerning the family, school, and society in general. Therefore, youths who live near Teleborg center are not prone to develop criminal character. The result also shows that sense of place is weak and impacts youths' behaviors, contributing to insecurity and anti-social behaviors in Teleborg Center. Further, the results show the area Teleborg center lacks a strong community that promotes collective action to tackle instability concerns in the area. However, it is important to acknowledge that the results cannot be generalized to the entire population.
433

Shading and natural ventilation, addressing indoor overheating in the present and future through the case study of Bysjöstrand eco-village

Ahmad Nia, Pardis January 2021 (has links)
Climate change temperatures expected to rise and extreme heat events (HW) canbe intensified. The influence of climate change on the built environment willbecame more apparent over the coming years. For example, there would be ashift in the risk of overheating in buildings, as well as the cooling and heatingneeds.Studies found that design strategies used to optimize buildings for winter like:good thermal insulation, high airtightness, and extra heat gains increase the riskof overheating. Thus, because of climate change, there is a need for checking thebuildings for summer conditions even in heating dominated countries.This study aims to investigate the potential of two main passive design strategiesto mitigate indoor overheating: ventilation and shading. The main focus of thisstudy is on single-family homes within the Swedish context. Bysjöstrand EkobyAssociation’s Bysjöstrand eco-village project is used as case study. 30 singlefamilyhomes are simulated using Honeybee to run EnergyPlus for calculatingindoor mean air temperature values, extracting the number of hour andpercentages of overheating for each building.Six alternative scenarios were used to evaluate the eco-village. The firststructures were assessed to determine the hours and percentage of time spentoverheating in the present and future situations. The second scenarios, whichinvolved utilizing natural ventilation, was tested to determine if and to what extentit can help to reduce the overheating risk in present and future.A combination of natural ventilation and shading was used for the last scenariosboth for current and future climate.According to the findings, natural ventilation has the greatest influence in reducingoverheating. Combining these two strategies in 2020 and 2070 can lower theaverage percentages of overheating from 17.5 % to 0.6 % and 52.8 % to 12.4%,respectively.The majority of the overheating risk may be addressed using passive strategies,based on the results. More detailed building design is likely be able to eliminateoverheating in single family homes, however, as this study showed it is importantto consider passive strategies from the early stage on the design process.
434

Sídliště Traktorového závodu v Minsku: prostor utváření identity Bělorusů v období pozdního stalinismu a poststalinismu. / Place Of Formation Of The Soviet Man: Traktormakers' Neighborhood In Minsk In Late Stalinism and Postsocialism

Linitskaya, Natallia January 2021 (has links)
Neighborhood in Minsk built for the workers of the tractor plant became a site of creation of soviet man. Architecture of socialist realism itself played a positive role: it played in tune with postwar longing for peaceful life in privacy, with family with comfortable structure of enclosed blocks, and at the same time created a background and scenery of life that elevated man through classicist image. Village youth came to the site driven by the postwar hunger and need to reconstruct their lives together with the country. They became workers, appropriated shop floor practice and were life-long recipients of the soviet distribution system that included housing as the main resource. People learned to live and work for future, "when communism arrives", withdrawing to privacy from the slogans, not paying attention to the latter but in that very moment rejecting the sphere of public life its real power, denying possibility to change.
435

Designing a large neighborhood search method to solve a multi-processor avionics scheduling problem

Svensson, Jesper January 2021 (has links)
This thesis introduces a Large Neighborhood Search (LNS) method to solve a multi-processor avionics scheduling problem. In a typical scheduling problem, tasks are scheduled with exact starting times. In this thesis however, tasks will instead be assigned to disjoint time segments, called buckets. For an assignment to be feasible, precedence relations and capacity constraints related to network and computing resources need to be fulfilled. The introduced LNS method relies on solving Mixed-Integer Programming (MIP)-models. To make progress in the search for a feasible assignment, we construct a MIP-model that allows violation of the problem constraints at a cost of increased objective value. The LNS method uses two operators, a destroy operator that chooses a set of tasks that are allowed to change buckets, and a repair operator that through solving the MIP-model creates a new schedule. This thesis develops 11 types of destroy operators and 30 (concrete) variants of them. The MIP-based LNS is evaluated on a set of 60 instances with up to 84 000 tasks and 21 processors. The instances belongs to six categories of varying difficulty. The MIP-based LNS solves 50 instances within our time limit, and the largest instance solved has 77 757 tasks. This is significantly better than solving the complete MIP-model in a single step. With this approach only 36 instances can be solved within our time limit and the largest instance solved has 48554 tasks.
436

Benefits And Detriments of Disaster-Related Shifts in Neighborhood Poverty: The Mediating Role of Contextual Resources and Stressors

Spielvogel, Bryn January 2021 (has links)
Thesis advisor: Rebekah L. Coley / Recent decades have witnessed the increasing spatial concentration of poverty and affluence in the United States (Biscoff & Reardon, 2013). Given well-documented links between neighborhood economic contexts and wellbeing (Chow et al., 2005), this has the potential to exacerbate disparities in health, particularly for people with limited neighborhood choice. However, limited research has systematically examined the neighborhood features underlying these links. A more nuanced understanding of why neighborhood poverty matters is essential for promoting equitable neighborhood development. Using rigorous analytic techniques that account for the dynamic nature of neighborhoods and help adjust for selection bias, I considered two complementary questions: 1) do observed neighborhood resources and stressors mediate associations between neighborhood poverty and wellbeing within and between individuals; and 2) how do observed versus perceived changes in neighborhood features mediate links between neighborhood poverty and wellbeing? I combined individual-level longitudinal data from the Post-Katrina Study of Resilience and Recovery with administrative neighborhood data drawn from the Census Bureau, FBI, and EPA. Analyses focused on a sample of 606 participants – primarily young Black mothers with low levels of income – who were affected by Hurricane Katrina, most of whom experienced some period of forced relocation. Participants were surveyed once before (2003/04) and twice after (2006/07; 2009) the hurricane. Results paint a complex picture. Contrasting with prior research, total effects of neighborhood poverty on wellbeing were limited. However, changes in neighborhood poverty were linked to wellbeing indirectly through intermediary neighborhood features, with results pointing to benefits and detriments of rising neighborhood poverty. Results were driven by those who changed neighborhoods over the course of the study. For participants that lived in the same New Orleans neighborhood across waves, changes in neighborhood poverty proved less consequential. Overall, results suggest that rather than treating neighborhood poverty as uniformly problematic for wellbeing, efforts to promote health equity should identify and build upon existing assets of neighborhoods, like affordability and amenity access, while also reducing stressors. / Thesis (PhD) — Boston College, 2021. / Submitted to: Boston College. Lynch School of Education. / Discipline: Counseling, Developmental and Educational Psychology.
437

Design golfového vozíku / Design of golf cart

Wenglorz, Marek January 2008 (has links)
In this diploma project I´m designing golf cart for transportation two persons . At the side of design I wanted to achieve an innovate feature and diferentiate from today´s production. Through my conception I want to offer a wider possibility of usage and increase use value of golf cart. Herewith I mean for example an integration to the traffic after urgent modification. I dont want to design the golf cart like a vision to the future, but I endeavour for complying with current trends at the producing.
438

Adverse Childhood Experiences, Neighborhood Disorganization, Co-parenting: The Impact on College Student Mental Health

Quarless, Mona L 01 January 2019 (has links)
Though mental health issues are prevalent amongst college students, pre-college environment and experiences are largely overlooked as potential factors in scientific literature. The current study examined the association of neighborhood disorganization, Adverse Childhood Experiences (ACEs) and mental health outcomes in a sample of college students. Utilizing the ecological model of human development and risk-resilience framework, I examined co-parenting quality as a plausible protective factor against the negative effects of adverse childhood experiences and neighborhood disorder. Self-report measures of ACEs, co-parenting quality, neighborhood disorder, anxiety, and depression were completed by a sample of college students (N = 259; mean age = 19.2 years). Simultaneous multiple regressions indicated that more ACEs predicted more depression and anxiety symptoms. However, neighborhood disorder did not predict anxiety or depression, and co-parenting quality did not moderate the association between neighborhood and mental health or ACEs and mental health outcomes. Results highlight future researchers should investigate pre-college environment to better understand college student mental health.
439

The Community and Neighborhood Impacts of Local Foreclosure Responses: A Case Study of Cuyahoga County, Ohio

Washco, Jennifer 23 March 2016 (has links)
The U.S.-American foreclosure crisis and related economic crises have had severe and wide-reaching effects for the global economy, homeowners, and municipalities alike. These negative changes led to federal, state, regional, and local responses intended to prevent and mitigate foreclosures. As of yet, no research has examined the community- and neighborhood-level impacts of local foreclosure responses. This research seeks to determine the economic, physical, social, and political changes that resulted from these responses. A mixed methods case study of Cuyahoga County, Ohio, home to Cleveland, was used to identify local level foreclosure responses—i.e. those carried out at the county level and below—and their effects. The qualitative component was comprised of semi-structured stakeholder interviews, including local governmental representatives, advocacy groups, and neighborhood representatives. Two community subcases were investigated in depth to further examine the mechanisms and effects of foreclosure responses. The quantitative component supplements the qualitative component by means of a quantile regression model that examines relationships between foreclosure responses and changes in property value at the Census tract level, used to approximate communities. The model integrates data for the entire county and estimates coefficients at various quantiles of the dependent variable, which uncovers variations in the associations between the variables along the dependent variable’s distribution. That is, with quantile regression it is possible to determine whether foreclosure responses have different effects depending on community conditions. The results indicate that the national and local context are of particular importance when responding to the foreclosure crisis. Lackluster national level responses necessitated creative and innovative responses at the local level. The Cleveland region is characterized a weak housing market and its concomitant vacancy and abandonment problems. Thus, post-foreclosure responses that deal with blighted property are essential. A wide variety of foreclosure responses took place in Cuyahoga County, in the form of systems reform, foreclosure prevention, targeting, property acquisition and control, legal efforts, and community- and neighborhood-level efforts. Several strategies used in these responses emerged as themes: targeting, addressing blight, strengthening the social fabric, planning for the future, building institutions and organizational capacity, and advocacy. Physical and economic impacts are closely linked and are brought about especially by responses using targeting and blight reduction strategies. Social impacts, such as increased identification with, investment in, and commitment to the community occurred as the result of responses that used the strategies of strengthening the social fabric and planning a shared future for the community. Finally, the strategies of building institutions and organizational capacity and advocacy resulted in increased political power in the form of more local control and additional resources for neighborhoods and communities. These results provide deeper insight into the effects of the foreclosure crisis and local responses to it on neighborhoods and communities. This case study identifies the importance of targeting, blight removal, strengthening social bonds, planning for a shared future, increasing organizational capacity, and advocacy in addressing the foreclosure crisis on the community and neighborhood levels, especially in weak housing market cities where need far outstrips the available resources.
440

Large Neighborhood Search for rich VRP with multiple pickup and delivery locations

Goel, Asvin, Gruhn, Volker 17 January 2019 (has links)
In this paper we consider a rich vehicle routing problem where transportation requests are characterised by multiple pickup and delivery locations. The problem is a combined load acceptance and generalised vehicle routing problem incorporating a diversity of practical complexities. Among those are time window restrictions, a heterogeneous vehicle fleet with different travel times, travel costs and capacity, multi-dimensional capacity constraints, order/vehicle compatibility constraints, and different start and end locations for vehicles. We propose iterative improvement approaches based on Large Neighborhood Search and a relatedness measure for transportation requests with multiple pickup and delivery locations. Our algorithms are characterised by very fast response times and thus, can be used within dynamic routing systems where input data can change at any time.

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