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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.
31

Uppskattningar av utsläpp från anläggningsmaskiner : En förstudie / Estimating emissions from construction equipment : A prestudy

Halldin, Fredrik January 2023 (has links)
Byggbranschens resurs och energianvändning är en av de främsta orsakerna till global uppvärmningoch står i Sverige för 20% av de totala utsläppen under ett år. För att minska utsläppen frånbyggarbetsmaskiner kan bland annat energieffektivare maskiner användas på byggarbetsplatser.Examensarbetet har utförts på Skanska Rental i syfte att i framtiden kunna synliggöra utsläppen fråndessa maskiner. Detta genom att ta fram hur uppskattningar av utsläppen kan utföras, samt presenterasför kunder som hyr maskiner. I denna förstudie genomfördes en gruppintervju med kunder, enlitteraturgranskning av fem olika beräkningsmetoder samt två individuella intervjuer angåendedatainsamling. Gruppintervjun visade att kunder gärna vill ta del av hur mycket utsläpp en maskinproducerar, och att de med informationen kan fatta mer hållbara beslut än de gör idag.Litteraturgranskningen visade att alla fem beräkningsmetoder kan användas för att uppskattautsläppen i drift för en anläggningsmaskin, men att de har olika för- och nackdelar. Europeiskamiljöbyråns nivå tre beräkning anses vara bäst lämpad för Skanska Rental. Detta eftersom den utgårfrån en hög detaljnivå vilket ger möjlighet att jämföra specifika maskiner mot varandra. Den användersig även främst av information som är tillgänglig från tillverkare och standardvärden från EEAshandbok för utsläppsberäkningar (Winther & Dore, 2019). Den data som kan behöva samlas in ärtiden en maskin spenderar i drift samt vilket arbetsmoment maskinen utfört under den tiden. Detta kanöka träffsäkerheten av uppskattningen, eftersom mer representativa belastningsfaktorer kan användasför maskinens arbetstid. I de individuella intervjuerna lyfts bland annat sensorer som ett alternativ tillatt samla den typen av data. Avslutningsvis uppmuntras tillverkare att ta fram livscykelanalyser avsina maskiner, samt att fler studier utförs med livscykelperspektivet inkluderat. Detta eftersomelektriska maskiner identifierats som en framtida utveckling inom branschen. / The construction industry's use of resources and energy is one of the main causes of global warming,and is responsible for 20% of Sweden's annual emissions. In order to reduce the emissions fromconstruction equipment, more energy efficient equipment can be used on construction sites. Thisbachelor's thesis was carried out at Skanska Rental in the purpose of, in the future, being able to showthe emissions of their products. This work was done to find out how emissions from constructionequipment can be estimated and presented to customers. In this prestudy, one group interview withcustomers was conducted, as well as a literature review of five different calculation methods foremissions, and two individual interviews regarding data collection. The group interview showed thatcustomers would like to know how much emissions the equipment produces, and that their sustainabledecision making can improve with that information. The literature review showed that all fivecalculation methods can be used to estimate the emissions, but that they have different pros and cons.The European environment agency’s tier 3 calculation is seen as the best suited for Skanska rental.The main reason for this is the high level of detail, which allows specific equipment to be compared toeach other. The method mainly uses information which can be acquired from manufacturers andstandard values from the EEA handbook for calculating emissions (Winther & Dore, 2019). The datawhich might need to be collected is the operating time of the equipment, and what work is being doneduring that time. This can be used to increase the accuracy of the estimate, since more representativeload factors can be used for the operating time of the equipment. In the individual interviews, sensorsare brought up as an alternative for gathering this data. Finally, more studies are encouraged to becarried out with the life cycle perspective included, and that manufacturers should produce life cycleanalyses of their equipment. This is because electric equipment has been identified as a futuredevelopment within the field.
32

Ledarskapets makt och anställdas commitment : - En fallstudie om maktens influens på upplevt commitment i en konsultverksamhet

Valentin, Corine, Högberg, Emma January 2015 (has links)
Makt samt organisatoriskt commitment är två väsentliga begrepp gällande ett företags ledarskap och deras anställda. Ledarskapets kärna utgörs av den influens ledargestalten har över sina underordnade och begreppet makt ska för ledaren fungera som ett drivmedel gällande hens influens. Det gäller således för ledargestalter att tillämpa makten i syfte att influera sina anställda mot organisationens uppsatta mål. För att lyckas få de anställda att sträva efter samma mål som organisationen satt upp samtidigt som de ska arbeta för att få kompetent arbetskraft att stanna krävs det av ledaren att hen kan främja organisatoriskt commitment bland de anställda. Syftet med studien är därmed att utifrån positioneringsmakt och kunskapsmakt analysera hur ledare för ett konsultföretag skapar affektivt, kalkylerande och eller normativt commitment hos sina anställda. Då studien avser att inge en djup och grundlig förståelse gällande dess syfte tillämpas en fallstudiedesign med en kvalitativ forskningsstrategi samt en deduktiv ansats. Vidare ämnar studien undersöka ett specifikt fallföretag utifrån vilket studiens primärdata samlats in via tio intervjuer. Intervjuerna har fördelats på åtta av Crabats anställda konsulter, företagets VD samt företagets ägare. För att på ett djupare plan kunna presentera studiens problematisering har en teoretisk referensram utformats vilken behandlar studiens huvudbegrepp samt beskriver övriga relevanta begrepp inom ämnet. Det går inte genom studiens slutsatser att urskiljer vilken form av maktbas som främjar vilket commitment i fallföretaget. Dock går det att konstatera att fallföretaget tillämpar två maktbaser, kunskapsmakt samt positioneringsmakt, vilka i valt fallföretag sammantaget gynnar tre former av commitment, affektivt, normativt samt kalkylerande commitment. Då fallföretaget utgörs av majoriteten män hade det varit intressant om vidare forskning undersökte om ovannämnda maktbaser främjar andra former av commitment i en konsultverksamhet med en majoritet kvinnor. / Power and organisational commitment are two essential concepts regarding a corporation’s leadership and workforce. The core of leadership consists of the influence the leader has over the workforce and the concept of power is to work as a propellant regarding his or hers influence. It thus applies that the leader utilise the power to influence the workforce to work towards the organisation's goals. For the leader to achieve the above and at the same time strive to retain proficient labour it is vital that he or she can enable organisational commitment among the employees. The aim of the study is therefore to analyse how a leader within a consulting firm uses his or her power in order to generate organisational commitment. The study is intended to convey a deep and thorough understanding regarding its aim, therefore we applied a case study design with a qualitative research strategy and a deductive approach. Furthermore, the study intends to examine a specific case company from which the study's primary data has been obtained through interviews with the company’s employees, the company's president and the owner. To be able to present the reader with a deeper understanding regarding the study’s problem discussion a theoretical framework, which addresses the study's main concepts and describes other relevant concepts appropriate to the subject has been developed. We could not based on the study’s conclusions distinguish between which powerbase that benefits which form of organisational commitment. However, it is clear that the case company applies two forms of power bases, knowledge - and the positioning base of power which, in the selected case company collectively promotes three forms of commitment, affective, normative and calculating commitment. Since the case company’s employees are comprised by a majority of men, it would be interesting if further research investigated whether the above-mentioned power bases promotes other forms of commitment in a consultancy with a majority of women employed.
33

Análise de relevância de elementos de custo em manutenção e suporte de sistemas ERP nas IFES: uma abordagem baseada em TCO e ITIL

Corrêa, Sergio Luis Lima 07 1900 (has links)
Submitted by Renata Lopes (renatasil82@gmail.com) on 2018-08-02T17:34:02Z No. of bitstreams: 1 sergioluislimacorrea.pdf: 2831312 bytes, checksum: 6561fc06286d3d5e2ee6d4736aadf79c (MD5) / Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2018-08-02T17:36:11Z (GMT) No. of bitstreams: 1 sergioluislimacorrea.pdf: 2831312 bytes, checksum: 6561fc06286d3d5e2ee6d4736aadf79c (MD5) / Made available in DSpace on 2018-08-02T17:36:11Z (GMT). No. of bitstreams: 1 sergioluislimacorrea.pdf: 2831312 bytes, checksum: 6561fc06286d3d5e2ee6d4736aadf79c (MD5) Previous issue date: 2015-07 / PROQUALI (UFJF) / Sistemas Integrados de Gestão Empresarial, conhecidos como ERP (Enterprise Resource Planning), são desenvolvidos e mantidos pelas IFES (Instituições Federais de Ensino Superior) para o desempenho das atividades que lhes competem, além disso, sua abrangência permite obtenção de informações gerenciais tornando-se valioso recurso estratégico. Recentes orientações dos órgãos de fiscalização e controle governamental, visando o aumento da eficiência, maior produtividade da máquina pública, e redução de custos têm levado as IFES a adotar políticas de governança de TI. Sistemas ERP geralmente são muito abrangentes e caros, por isso seus custos devem ser mensurados, não somente custos de aquisição, mas principalmente custos de manutenção e suporte. Neste sentido, com objetivo de determinar os elementos de custo para mensurar os custos de manutenção e suporte na gestão de sistemas ERP, houve motivação para esta pesquisa sobre a metodologia TCO (Total Cost of Ownership) suportada pelos processos do framework ITIL (Information Technology Infrastructure Library). O presente trabalho, de caráter descritivo, identificou e relacionou, a partir da pesquisa bibliográfica, os elementos de custo mais evidentes no TCO e ITIL. Em seguida, foi aplicado um questionário web, junto a Especialistas em gestão de Sistemas ERP das IFES, visando mapear sua percepção de relevância sobre esses elementos de custo elencados na pesquisa. Os resultados mostram os elementos de custo ordenados por relevância e frequência aplicáveis à manutenção e suporte de sistemas ERP e a contribuição esperada é a de facilitar a mensuração desses custos. / Integrated Systems Management, known as ERP (Enterprise Resource Planning), are developed and maintained by IFES (Federal Institutions of Higher Education) for the performance of activities that concern them, in addition, its scope allows obtaining management information becoming valuable strategic resource. Recent guidelines of the supervisory bodies and government control, aimed at increasing efficiency, higher productivity of public administration, and cost reduction have led IFES to adopt IT governance policies. ERP systems are usually very comprehensive and expensive, so their costs should be measured, not only acquisition costs, but mainly maintenance and support costs. In this regard, in order to determine the cost elements to measure the costs of maintenance and support in managing ERP systems, there was motivation for this research on the TCO methodology (Total Cost of Ownership) supported by ITIL framework processes (Information Technology Infrastructure Library). This work, descriptive, identified and listed from the literature, the most obvious cost elements in TCO and ITIL. Then a web questionnaire was administered, along with experts in ERP systems management of IFES, aiming to map their perception of relevance of these cost factors listed in the survey. The results show the cost elements ordered by relevance and frequency that the maintenance and ERP systems support and the expected contribution is to facilitate the measurement of these costs.
34

Návrh technického provedení FVE včetně systému řízení pro komerční objekt v souladu s platnými pravidly pro program ÚSPORY ENERGIE - FVE / Photovoltaic System Proposal for Commercial Building in Accordance with Applicable Rules for Energy Savings Program

Zeman, Daniel January 2018 (has links)
Main purpose of the thesis is to create proposal of the photovoltaic hybrid system for commercial building in accordance with applicable rules for energy savings program. The introductory part of the thesis describes the rules regarding the photovoltaic system parts. The next part of the thesis describes the available technical solution for realization of the photovoltaic system design and the possibilities of electric energy accumulation in these systems and how to deal with power overflows using the power flow controller and what is the negative impacts on the distribution network when switching the connected load. In the next part the design of the PV system is carried out according to the valid assumptions described in the theoretical part of the thesis. Verification of power flow controller and measurement results in UEEN laboratories. The last part of the thesis is an evaluation of the economic part of the proposed system.
35

Návrh vhodného etalonu délky pro nano-CT měřicí přístroj / Design of a suitable length standard for nanp-CT measuring device

Kožiol, Martin January 2020 (has links)
The diploma thesis deals with the design of three length standards, which will serve to ensure metrological traceability between Rigaku nano3DX, SIOS NMM-1, Zeiss UPMC Carat 850 and other devices located at ÚVSSR BUT and CEITEC Brno. The first part of the thesis focuses on the theoretical acquaintance with concepts closely related to the issue of ensuring metrological traceability. In addition, this section deals with computed tomography and the description of individual devices. The second part of the thesis is devoted to design, production process and testing of individual standards. The last part describes the ensuring the calibration of the smallest standard, the so-called Nano standard and the calculation of the uncertainty of measuring its calibrated length. At the end of the thesis, the outputs of these activities are evaluated.
36

Regime fatigue : a cognitive-psychological model for identifying a socialized negativity effect in U.S. Senatorial and Gubernatorial elections from 1960-2008

Giles, Clark Andrew 11 July 2014 (has links)
Indiana University-Purdue University Indianapolis (IUPUI) / This research project proposes to try to isolate and measure the influence of “regime fatigue” on gubernatorial elections and senatorial elections in the United States where there is no incumbent running. The research begins with a review of the negativity effect and its potential influence on schema-based impression forming by voters. Applicable literature on the topics of social clustering and homophily is then highlighted as it provides the vehicle through which the negativity effect disseminates across collections of socially-clustered individuals and ultimately contributes to changing tides of public opinion despite the fact that the political party identification can remain relatively fixed in the aggregate.

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