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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
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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.
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Showing 1 to 8 of 8 (0.028 seconds)Spelling suggestions: "subject:"esource usage"" "subject:"esource osage""
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Modelling parallel database management systems for performance predictionTomov, Neven T. January 1999 (has links)
No description available.
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Efficient Resource Usage ModellingRamanan, V Janaki 04 1900 (has links) (PDF)
No description available.
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BEYOND AGGREGATED DATA: A STUDY OF GROUP DIFFERENCES IN CONCEPTUAL UNDERSTANDING AND RESOURCE USAGE IN AN UNDERGRADUATE DYNAMICS COURSENick A. Stites (5930300) 17 January 2019 (has links)
<p>As pedagogical innovations
continue to be developed and adopted in engineering education, it is important
to understand how these innovations affect the students’ experiences and
achievements. A common data analysis
practice when evaluating educational innovations is to aggregate the data from
all of the students together. However,
this data aggregation inherently biases the results toward the characteristics
of the dominant student group, leaving the experiences of minority groups
largely unexplored. In this
dissertation, I investigate the students’ experiences and achievements in an
undergraduate dynamics course, and I intentionally use analysis methods that
disaggregate the data to better understand the behaviors and performance of
smaller subgroups of students, not just the majority.</p>
<p> This
dissertation presents three studies that examine: 1) the validity, reliability,
and fairness of a standardized set of conceptual questions on the final exam,
with a focus on gender fairness, 2) how and why the students use the available
resources, and 3) how the students’ holistic resource usage patterns relate to
their academic achievement. My
motivation for choosing these studies was that conceptual assessments and
customized resources are two key components of the learning environment for the
dynamics course. However, the quality of
the conceptual exam questions used for the course had yet to be evaluated. Similarly, the learning environment for the
course incorporates many customized resources, including a custom-written
“lecturebook” (a hybrid of a textbook and a workbook) and an extensive online
library of videos, but little was known about how the students used these
resources, or how the students’ pattern of resource usage related to their
performance in the course. </p>
<p> The
first study in this dissertation used multiple-group confirmatory factor
analysis to investigate item-level gender bias in a 12-item Abbreviated
Dynamics Concept Inventory (aDCI), which was a set of standardized conceptual
questions included on the final exam.
The results suggested that two items were slightly biased against women,
with stereotypically-masculine contexts and content as possible sources of the
bias. The bias in the aDCI items likely
unfairly lowered some women’s final exam scores, highlighting the need for
engineering educators to consider the fairness of their assessments.</p>
<p> The
second study used a cluster analysis of survey responses to identify nine
archetypical patterns of resource usage, all of which differed from the average
resource-usage pattern of the aggregated sample. An analysis of forty-four student interviews,
organized by resource-usage cluster, determined that students exhibited their
resource-usage behaviors largely because of how they perceived the resource’s
availability, accessibility, and quality.
The results illustrate that there is no “typical” way in which the
students used the resources, so it is important for instructors to consider a
wide array of usage behaviors when designing a course’s learning environment
and resources.</p>
<p> The
third study utilized a multiple regression analysis to find that <i>on average</i> a student’s resource-usage
pattern is not related to their achievement when controlling for many other
demographic, cognitive, and non-cognitive factors that can affect resource
usage and performance. However, two
individual resource-usage patterns were significantly related to achievement. Students who primarily used their lecturebook
and their peers for support performed better than their similar peers in other
resource-usage clusters. Conversely,
students who rarely used their lecturebook had lower course grades than their
peers. Drawing from the results of the
second study, general study-habit suggestions for the students in the course
were extracted from the qualitative themes found in the interviews of the
students in these two clusters.</p>
<p> Overall,
the results of these three studies highlight how the experiences and
achievements of smaller groups of students would go unnoticed if analytical
methods that only utilized aggregated data were used. While the setting of this research is
specific to the assessments and resources of a given dynamics course, the
methods used to disaggregate the data to gain insights about different
subgroups of students are applicable to many engineering education
contexts. My hope is that this work
inspires more researchers to consider the experiences of all students, not just
those of the majority.</p>
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Gerenciamento da transmissão de aplicações hipermídia em modo pushJosué, Marina Ivanov Pereira 30 June 2016 (has links)
Submitted by Renata Lopes (renatasil82@gmail.com) on 2017-05-30T17:17:25Z
No. of bitstreams: 1
marinaivanovpereirajosue.pdf: 1327137 bytes, checksum: 2b404732ed5a5dd800a9c7adb3194f8f (MD5) / Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2017-06-01T11:35:39Z (GMT) No. of bitstreams: 1
marinaivanovpereirajosue.pdf: 1327137 bytes, checksum: 2b404732ed5a5dd800a9c7adb3194f8f (MD5) / Made available in DSpace on 2017-06-01T11:35:39Z (GMT). No. of bitstreams: 1
marinaivanovpereirajosue.pdf: 1327137 bytes, checksum: 2b404732ed5a5dd800a9c7adb3194f8f (MD5)
Previous issue date: 2016-06-30 / Atualmente o conteúdo hipermídia pode ser entregue utilizando diferentes tecnologias
de rede, como a TV Digital terrestre por satélite, IPTV e Web. Por isso, as máquinas de
apresentação hipermídia devem levar em conta as especificidades dessas redes suportadas,
de modo a prover os níveis de QoS/QoE esperados pelo usuário do conteúdo. Máquinas de
apresentação avançadas podem empregar também a análise de conteúdo para auxiliar na
tarefa de manutenção dos níveis de QoE. De modo especial, quando o conteúdo hipermídia
inclui dados enviados por pull, as máquinas de apresentação podem criar um Plano de Pré-
Busca baseado no comportamento da apresentação extraído da especificação do conteúdo.
Entretanto, quando o conteúdo hipermídia inclui dados enviados por push, a análise do
conteúdo deve ser transferida para o lado do servidor e se basear na construção de um
Plano de Transmissão de Conteúdo. O Plano de Transmissão de Conteúdo é uma estrutura
de dados que prevê os instantes em que objetos de mídia devem ser transmitidos, e por
quanto tempo, para otimizar o uso de recursos fim-a-fim como largura de banda e espaço de
armazenamento nos receptores. Este trabalho propõe um framework para gerenciamento
da entrega de conteúdo hipermídia em modo push. O framework é genérico o suficiente
para ser adaptável a diferentes cenários de entrega de conteúdo que podem empregar
diferentes protocolos e técnicas de gerenciamento. Alguns cenários de instanciação do
framework e seus respectivos resultados são discutidos nesta dissertação. / Nowadays hypermedia content may be delivered using different networking technolo-
gies, such as terrestrial broadcasting, satellite, IPTV and the Web. Therefore hypermedia
presentation engines must be designed taking into consideration the specificities of their
supported networks, in order to provide the expected QoS/QoE levels. Advanced pre
sentation engines should also employ hypermedia content analysis to help on the task of
maintaining QoE levels. Specifically, when the hypermedia content includes pulled data,
presentation engines may create a Content Prefetching Plan based on the presentation
behavior learned from the specification of that content. However, when the hypermedia
content includes pushed data, this content analysis should be transferred to the server
side and be taken as a basis for building the so-called Content Transmission Plan. The
Content Transmission Plan is a data structure that predicts the time when media objects
should start to be transmitted and for how long, in order to optimize end-to-end resource
usage such as communication bandwidth and storage space in receivers. This work pro
poses a framework for managing the push-mode delivery of hypermedia content. The
framework is generic enough to be instantiated over different content delivery scenarios
that may employ different protocols and management techniques. Several instantiation
scenarios and their respective results are also discussed in this dissertation.
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Inomhusodling av microgreens i urban miljö - ur ett företags- och hållbarhetsperspektivAndersson, Josefina, Holmén, Wilma January 2023 (has links)
Syftet med detta arbete var att undersöka inomhusodlingen av microgreens ur ett hållbarhetsperspektiv med anledning av att matförsörjningen står inför stora utmaningar. Detta gjordes i förhållande till resursanvändning, ekonomisk hållbarhet ur ett företagsperspektiv samt till vilka möjligheter och hinder microgreensodlingar har för att öka tillgången på lokala råvaror. Microgreens är unga hjärtbladsväxter som skördas när de har fått sitt första bladpar. I den här studien har både kvantitativa och kvalitativa metoder använts.Metoderna har inkluderat en materialflödesanalys samt en ekonomisk analys som har baseratspå Botildenborgs microgreensodling. Dessutom har semi-strukturerade intervjuer genomförts med två personer som har god kunskap om microgreens. Resultatet visade att resurserna iBotildenborgs microgreensodling används förhållandevis ekologiskt hållbart. Det finns däremot förbättringspotential, såsom ett konstant belysningsintervall och en lägreljusintensitet på LED-lamporna. Samtliga inköpta fröer borde även vara svenskproducerade.Vi kom även fram till att det är ekonomiskt hållbart för Botildenborg att bedriva sin micorgreensodling, även när elpriserna anses vara höga. Här finns också förbättringspotential rörande belysningsintervallet och lampornas ljusintensitet. Vi har konstaterat att de möjligheter som finns för att öka kundernas tillgång på lokala råvaror, såsom microgreens är: utbildning, tillgång året om, ökad efterfrågan samt microgreens närings-, hälso- ochmiljöfördelar. Hindren utgörs däremot av: bristande kunskap hos konsumenterna, greenwashing samt ett högt försäljningspris. Avslutningsvis kan inomhusodlingen av microgreens vara ett steg på vägen till att en tryggad livsmedelsförsörjning uppnås, men inte ett avgörande sådant. / The aim of this study was to investigate indoor farming of microgreens from a sustainability perspective, which is relevant as the food supply is facing major challenges. This was done in relation to resource usage, economic sustainability from a business perspective and which opportunities and obstacles there are for the cultivation of microgreens to increase the access to locally grown food. Microgreens are young cotyledons that are harvested at the true leaf stage. In this study both qualitative and quantitative methods have been used. This has included a material flow analysis and an economic analysis for Botildenborgs indoor farming of microgreens. Further on, semi-structured interviews were carried out with two people with good knowledge of microgreens. The results showed that resources in Botildenborgs indoor farming of microgreens were used relatively efficiently according to ecological sustainability. Although, there is some potential for improvements with constant lighting with low intensity LED lamps. All purchased seeds should also be produced at local scale (in Sweden) as far as possible. We also concluded that it is economically sustainable for Botildenborg to operate their indoor farm, even when the electricity prices are considered high. There is potential forimprovements here too, regarding the continuous lighting and the lamps intensity. We also concluded that opportunities to increase the customers access to locally grown food include education, all year-round access, increased demand, and nutritional, health-related, and environmental benefits. The obstacles on the other hand are lack of knowledge among consumers, greenwashing, and high selling prices. Finally, indoor farming of microgreens can be a step towards food security, but not a decisive one.
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ÅTERBRUK I BYGGBRANSCHEN UR ETT MILJÖMÄSSIGT PERSPEKTIV / RECYCLING IN THE CONSTRUCTION SECTOR FROM AN ENVIRONMENTAL PERSPECTIVEAndersson, Evelina, Davidsson, Ellen January 2023 (has links)
Bygg- och fastighetsbranschen står idag för en stor del av de årliga utsläppen. För att motverka klimatförändringar, brist på jungfruligt material samt minska vårt byggavfall krävs en omställning mot en mer hållbar byggbransch. Det finns ett stort intresse hos olika aktörer i branschen att jobba med cirkulärt byggande. Återbruk är en byggsten i det cirkulära byggandet, men problemet är att det saknas kunskap och en effektiv process. Återbruk är idag även oftast kostsam vilket leder till att aktörer istället väljer att köpa nya grejer framför att återbruka. Med ändliga resurser är det viktigt att förlänga ett materials livscykel. Målet med studien är att främja återbruk genom att lyfta de drivkrafter som finns ur främst ett miljömässigt perspektiv. Studien utreder även vikten av återbruk för att bland annat minska resursanvändning, avfallsmängd samt utrotning av den biologiska mångfalden. Undersökningsmetoderna som används är litteratur-, dokumentstudier samt kvalitativa semistrukturerade intervjuer. Urvalet av respondenter består av aktörer i olika delar i byggbranschen. Med kommande skärpta krav på miljödeklarationer kommer användandet av återbrukat material att öka och för detta krävs det en bättre och mer gynnsam process. Utmaningaridag är främst hur en återbrukad produkts utsläpp ska beräknas. Ytterligare en utmaninghandlar om garantitid. Vem står för garantin och hur lång garantitid kan ges. En annan utmaning handlar om att det idag finns andra krav på produkter vilket leder till att många av det produkter som kan återbrukas brister i att de inte uppfyller dagens krav. Studien har resulterat i att återbruk har en stor effekt på miljön och är en viktig byggsteni en cirkulärekonomi. Det har vidare konstaterats att återbruk kan bidra till fördelar för aktörerna genom dels en effektiv marknadsföring, vilket leder till en mer attraktiv arbetsplats och ekonomiska vinster. Dessutom är återbruk en viktig del för att kunna vara ledande inom byggbranschen. Respondenternas uppfattning är att det på nationell nivå saknas lagkrav och incitament för att främja arbetet med återbruk. / The construction and real estate sector is currently responsible for a large share of annual emissions. To counteract climate change, lack of virgin materials and reduce waste, a change is needed. The industry needs to become more sustainable. There is great interest among various actors in the industry to work with circular construction, of which reuse is an important part. But the problem is that there is a lack of knowledge and an effective process. Today, reuse is also usually costly, which means that actors instead choose to buy new things rather than reuse. With finite resources, it is important to extend the life cycle of a material. The goal of the study is to promote reuse by highlighting the driving forces that exist primarily from an environmental perspective. The study also explores the importance of using reused materials to decrease the use of new resource, waste and the prevent extinction of biodiversity. he research methods used are literature-, document studies and qualitative semi-structured interviews. The selection of respondents consists of stakeholders in different parts of the construction industry. With stricter requirements in the future for environmental declarations, the use of recycled materials will increase and for this a better and more favorable process is required. Today there are difficulties in how to calculate a product's emissions and a major problem is about the warranty period. Who is responsible for the guarantee and how long a guarantee period can be given. Another difficulty is that today there are other requirements for products, which leads to that many of the products are unable to be reused. The study has resulted in that reuse has a major effect on the environment and it is an important building block in a circular economy. It has also been found that reuse can contribute to benefits for actors through effective marketing, which leads to a more attractive workplace and financial gains. In addition, reuse is an important part of being a leader in the construction industry. The perception of the respondents is that there are currently a lack of legal requirements or incentives at national level to promote reuse.
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Wordlength inference in the Spade HDL : Seven implementations of wordlength inference and one implementation that actually works / Ordlängdsinferans i Spade HDL : Sju olika implementationer av ordlängdsinferens och en implementation som faktiskt fungerarThörnros, Edvard January 2023 (has links)
Compilers, complex programs with the potential to greatly facilitate software and hardware design. This thesis focuses on enhancing the Spade hardware description language, known for its user-friendly approach to hardware design. In the realm of hardware development data size - for numerical values data size is known as "wordlength" - plays a critical role for reducing the hardware resources. This study presents an innovative approach that seamlessly integrates wordlength inference directly into the Spade language, enabling the over-estimation of numeric data sizes solely from the program's source code. The methodology involves iterative development, incorporating various smaller implementations and evaluations, reminiscent of an agile approach. To assess the efficacy of the wordlength inference, multiple place and route operations are performed on identical Spade code using various versions of nextpnr. Surprisingly, no discernible impact on hardware resource utilization emerges from the modifications introduced in this thesis. Nonetheless, the true significance of this endeavor lies in its potential to unlock more advanced language features within the Spade compiler. It is important to note that while the wordlength inference proposed in this thesis shows promise, it necessitates further integration efforts to realize its full potential.
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Jämförelse av cache-tjänster: WSUS Och LanCache / Comparison of cache services: WSUS and LanCacheShammaa, Mohammad Hamdi, Aldrea, Sumaia January 2023 (has links)
Inom nätverkstekniken och datakommunikationen råder idag en tro på tekniken nätverkscache som kan spara data för att senare kunna hämta hem det snabbare. Tekniken har genom åren visat att den effektivt kan skicka den önskade data till sina klienter. Det finns flera cache-tjänster som använder tekniken för Windows-uppdateringar. Bland dessa finns Windows Server Update Services (WSUS) och LanCache. På uppdrag från företaget TNS Gaming AB jämförs dessa tjänster med varandra under examensarbetet. Nätverkscache är ett intressant forskningsområde för framtida kommunikationssystem och nätverk tack vare sina fördelar. Likaså är uppgiften om att jämföra cache-tjänsterna WSUS och LanCache intressant i och med det öppnar upp insikt om vilken tjänst är bättre för företaget eller andra intressenter. Både forskningsområdet och uppgiften är viktiga och intressanta när användare vill effektivisera användningen av internetanslutningen och bespara nätverksresurser. Därmed kan tekniken minska nedladdningstiden. Till det här arbetet besvaras frågor om vilken nätverksprestanda, resursanvändning och administrationstid respektive cache-tjänst har, och vilken cache-tjänst som lämpar sig bättre för företagets behov. I arbetet genomförs experiment, som omfattar tre huvudmättningar, och följs av en enfallstudie. Syftet med arbetet är att med hjälp av experimentets mätningar få en jämförelse mellan WSUS och LanCache. Resultatet av arbetet utgör sedan ett underlag för det framtida lösningsvalet. Resultaten består av två delar. Den första visar att båda cache-tjänsterna bidrar till kortare nedladdningstider. Den andra är att LanCache är bättre än WSUS när det gäller nätverksprestanda och resursanvändning, samt mindre administrationstid jämfört med WSUS. Givet resultat dras slutsatsen att LanCache är cache-tjänsten som är mest lämpad i det här fallet. / In the field of network technology and data communication, there is a current belief in the technology of network caching, which can store data to later retrieve it more quickly. Over the years, this technology has proven its ability to efficiently deliver the desired data to its clients. There are several caching services that utilize this technology for Windows updates, among them are Windows Server Update Services (WSUS) and LanCache. On behalf of the company TNS Gaming AB, these services are compared to each other in this thesis. Network caching is an interesting area of research for future communication systems and networks due to its benefits. Likewise, the task of comparing the cache services WSUS and LanCache is interesting as it provides insights into which service is better suited for the company or other stakeholders. Both the research area and the task are important and intriguing when users seek to streamline the use of their internet connection and conserve network resources. Thus, the technology can reduce download times. For this work, questions about the network performance, resource usage, and administration time of each cache service are answered, as well as which cache service that is better suited to the company's needs. The work involves conducting experiments, including three main measurements, followed by a single case study. The purpose of the work is to compare WSUS and LanCache using the measurements from the experiment. The outcome of the work then forms a basis for future solution choice. The results consist of two parts. The first shows that both cache services contribute to shorter download times. The second is that LanCache outperforms WSUS in terms of network performance and resource usage, and also requires less administration time than WSUS. Given the results, the conclusion is drawn that LanCache is the most suitable caching service in this case.
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