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1
Amrén, Johanna, and Ellen Nilsson. "Interventions in Existing Buildings : Methods and Materializations." Thesis, KTH, Arkitektur, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-223222.
Повний текст джерелаАнотація:
Our aim with this project was to become more aware about the consequencesthat different kinds of changes or additions have on existing buildings andtheir characteristic architectural qualities. We have focused our study on thepart when a change or addition is designed, how the planned intervention isto be materialized, trying to understand how a change or addition relate to theexisting. Whether it is made to closely resemble that which is already there orcontrast in for example form, colour or material. In our thesis we call theseways of relating to the existing methods, and it is these methods that we havetried to identify, analyse and implement throughout this project.Some of the questions we have asked ourselves are:What different methods are there and how can they be materialized? How do theywork in combination? What effect do they have on a room and what do the differentmethods communicate?
2
Hindié, Fares. "Evaluation of existing bridges using advanced reliability methods." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0031/MQ64226.pdf.
Повний текст джерела
3
Boxill, Lois E. C. "Foundation remediation of existing structures using ground densification methods." Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/21792.
Повний текст джерела
4
Samuelsson, Love. "Introducing DevOps methods and processes for an existing organization." Thesis, Linnéuniversitetet, Institutionen för datavetenskap och medieteknik (DM), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-107150.
Повний текст джерелаАнотація:
DevOps is a cultural idea rather than a firm way to do software development, with the aim of reducing software lead times by bringing operations and development closer via principles that mainly deal with automation. This paper provides a potential DevOps solution for Wexnet, an internet service provider company. A requirements list is created by interviewing which is then used to evaluate existing web-based git solutions. Two viable candidates were selected, GitHub and GitLab which were compared against each other. GitLab was chosen because of its comparably low resource usage and lower overall setup complexity.
5
HAMDY, MOHAMED ADEL. "DETERMINATION OF THE SOLAR CELL EQUATION PARAMETERS: NEW METHODS, EXISTING METHODS, ANALYSIS AND COMPARISON." Diss., The University of Arizona, 1985. http://hdl.handle.net/10150/188119.
Повний текст джерелаАнотація:
Presented here is an analysis of some of the existing methods used for the determination of the series resistance of solar cells which is one of the key parameters in solar cell fabrication and technology together with the diode ideality factor and the reverse saturation current. These methods are based on the network analysis of the single-exponential lumped constant parameters model which has been accepted as being operationally sufficient to describe the current-voltage characteristics of the solar cell. The methods analyzed in this study are divided into two main groups. Methods using two I-V characteristics and methods using a single I-V output curve. For comparison purposes, all methods are applied first using data extracted from existing I-V curves and then using in-lab measurements of a commercial solar cell. It is demonstrated that the determination of the series resistance of solar cells using two I-V characteristics has several advantages over methods using a single I-V output curve. It becomes evident that methods which use a single I-V output curve are only accurate for cells operating under very high illumination conditions. At normal intensities, however, such methods result in erroneous R(s) values. This is due to the assumption of a constant diode ideality factor along the entire I-V output curve used in the derivation of these methods. It is shown that this assumption is inaccurate at normal intensity levels and can be appropriate only under very high illuminations. Three new methods are proposed in this study. One of the methods presents a new approach in determining the solar cell equation parameters. The new approach relies upon treating the diode ideality factor of the solar cell as a variable that is a function of both the terminal current and the light intensity level. The method uses two I-V output curves at different illumination levels in determining all solar cell parameters: The series resistance, the diode ideality factor and the reverse saturation current. Although somehow tedious, the new approach shows that, for accurate modeling of solar cells and prediction of illuminated characteristics at different light levels based on the single-exponential model, the diode ideality factor should be treated as a variable while the series resistance is held constant. Comparison between all methods is presented and a reasonable judgement and recommendations concerning the best method to be used are given.
6
Karlsson, Terése. "Contingency planning for Bofors Defence AB, an application of existing methods." Thesis, Linköping University, Department of Electrical Engineering, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1639.
Повний текст джерелаАнотація:
Bofors Defence AB is in the process of updating and documenting the company’s routines for information security. The object is to be certified according to the standard ISO 17799-1 during 2003. Among other things updating means that the company will be provided with contingency plans who should insure a reliable IT-environment. Basically it is all about protecting the company’s information related systems, ensure contingency in the daily work and maintaining the trust of the market and the authorities. The aim of the Thesis was to apply existing methods in the making of contingency plans. The plans are focused on the information related systems that are critical to the company and takes in consideration the threats, which might stop them from operating as desired. The contingency plans cover a limited numberof systems, which for example handle e-mail and order intake. The plans comprise the servers and platforms (for example operating systems), which are essential to the systems. The Thesis is focused on the aspect of availability. The aspects of confidentiality (for example fire walls) and integrity (for example access restrictions) are handled by the company’s own personnel. To ensure contingency is only a minor part of the work that needs to bee done before a company can be certified according to ISO 7799-1. This Thesis needs complementary additions before it can be incorporated in the documentation presented to the accreditation agency. However the result is in line with the company’s commission.
7
Fisher, Matthew John. "Comparison of prefabricated cage system with existing reinforcement methods in concrete columns." Connect to resource, 2006. http://hdl.handle.net/1811/6461.
Повний текст джерелаАнотація:
Thesis (Honors)--Ohio State University, 2006.Title from first page of PDF file. Document formatted into pages: contains vi, 47 p.; also includes graphics. Includes bibliographical references (p. 47). Available online via Ohio State University's Knowledge Bank.
8
Mukhopadhyay, Shraddha. "Comparison of existing ZOI estimation methods with different model specifications and data." Thesis, Högskolan Dalarna, Mikrodataanalys, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:du-34397.
Повний текст джерелаАнотація:
With the increasing demand and interest in wind power worldwide, it is interesting to study the effects of running windfarms on the activity of reindeers and estimate the associated Zone of Influence (ZOI) relative to these disturbances. Through simulation, Hierarchical Likelihood (HL) and adaptive Lasso methods are used to estimate the ZOI of windfarms and catching the correct threshold at which the negative effect of the disturbances on the reindeer behaviour disappears. The results found some merit to the explanation that the negative effect may not disappear abruptly and more merit to the fact that a linear model was still a better choice than the smooth polynomial models used. A real-life data related to reindeer faecal pellet counts from an area in northern Sweden were windfarms were running were analyzed. The yearly time series data was divided into three periods : before construction, during construction and during operation of the windfarms. Logistic regression, segmented model, and HL methods were implemented for data analysis by using covariates as distance from wind turbine, vegetation type, the interaction between distance to wind turbine and time period. A significant breakpoint could be estimated using the segmented model at a distance of 2.8 km from running windfarm, after which the negative effects of the windfarm on the reindeer activity disappeared. However, further work is needed for estimation of ZOI using HL method and considering other possible factors causing disturbances to the reindeer habitat and behaviour.
9
Arens, Kevin C. "Remediation Methods for Subgrade Settlements of Existing Roadways: Lifetime Cost-Benefit Analysis." University of Dayton / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1575537943683836.
Повний текст джерела
10
Arrandale, Victoria Helen. "An evaluation of two existing methods for analyzing longitudinal respiratory symptom data." Thesis, University of British Columbia, 2006. http://hdl.handle.net/2429/31624.
Повний текст джерелаАнотація:
Due to the complexities of analyzing repeated binary outcomes, changes in respiratory
symptoms over time are rarely studied. In fact, most respiratory epidemiology studies to date
have not taken full advantage of longitudinal symptom data.
This thesis evaluated discrete mixture models (SAS® Proc Traj) and generalized linear
mixed models (SAS® Proc Glimmix) with respect for their applicability to six basic
respiratory symptom research questions. These methods are both capable of handling
repeated binary outcome data and permit inclusion of time varying covariates. These two
techniques were then applied in a case study.
Results from the evaluation of the methods indicated that Proc Glimmix can model the
predictors of respiratory symptoms as well as population trends in symptom reporting over
time. But Proc Glimmix is not suitable for modeling pattern or shape of change over time.
In contrast, Proc Traj models patterns of change over time, and identifies multiple subgroups
within the population. Proc Traj is not capable of modeling overall population trends. Both
methods have statistical limitations that researchers need to understand; to help with this a
simple guide describing both techniques was compiled.
The case study utilized longitudinal data from a population of marine workers and focused
on the outcome breathlessness, or dyspnea. Results from both Proc Traj and Proc Glimmix
models indicated that the probability of reporting dyspnea changed over time in this
population. Proc Traj models identified two distinct patterns of change in the population
(one increasing over time, one steady over time). Proc Glimmix models identified several
factors that were associated with dyspnea reporting; older age, childhood asthma, smoking
and being female were associated with more dyspnea, whereas better lung function and
current exposure to respiratory irritants were associated with less dyspnea.
The overall conclusion was that both Proc Traj and Proc Glimmix models are suitable for
analyzing repeated binary respiratory symptom data and researchers are encouraged to
consider their use. Proc Glimmix is best for modeling the predictors of reporting a symptom
at the population level, while Proc Traj is suited for modeling multiple subgroups in the
population and their patterns of change over time.Medicine, Faculty of
Population and Public Health (SPPH), School of
Graduate
11
Gear, James C. Quade Dana. "A test for detecting space-time clustering and a comparison with some existing methods." Chapel Hill, N.C. : University of North Carolina at Chapel Hill, 2006. http://dc.lib.unc.edu/u?/etd,672.
Повний текст джерелаАнотація:
Thesis (DrPH)--University of North Carolina at Chapel Hill, 2006.Title from electronic title page (viewed Oct. 10, 2007). "... in partial fulfillment of the requirements for the Doctor of Public Health degree in the School of Public Health (Biostatistics)." Discipline: Biostatistics; Department/School: Public Health.
12
Stokes, Jessica Elizabeth. "Investigating novel and existing methods of preventing, detecting and treating digital dermatitis in dairy cattle." Thesis, University of Bristol, 2011. http://hdl.handle.net/1983/04667d13-3358-4f2b-a9a2-936adf7d8187.
Повний текст джерелаАнотація:
Digital dermatitis (DD) is a painful skin condition currently considered to be the leading cause of infectious lameness in dairy cattle. The overall objective of this project was to investigate novel and existing methods of detecting DD to be used by farmers and researchers to monitor the disease, and to investigate the impact of farmers’ prevention and treatment strategies on disease prevalence. Visual inspection of lesions in the parlour was found to be a practical and reliable method for detecting and classifying DD. In addition, thermography was identified as a potential tool for the detection of cattle foot disorders. Validating such methods for detecting DD is important because locomotion scoring alone was not found to be sufficiently sensitive to identify cows with DD. In a further study a novel ethogram approach validated several specific behaviours associated with DD. A telephone survey was carried out to establish the nature and scope of management strategies farmers use to control DD. The two main strategies identified in the survey were 1) whole herd footbathing and 2) an individual treatment approach. A one year observational study on fifteen farms used the inspection method developed in the parlour to investigate the impact these two approaches had on disease prevalence. It was found that as herd size increased, footbathing became far less effective in maintaining a low prevalence than treating cows individually. Farmers use a variety of methods in an attempt to control DD on their farms, with different levels of emphasis placed on the priority and regularity of prevention and treatment. An outcome of this study is a DD monitoring approach farmers can use, to routinely assess the effectiveness of prevention and treatment strategies. In addition, results indicate that as herd size and disease prevalence increase, individual treatment is imperative for therapeutic resolution of DD.
13
He, Jiamin. "Investigation on Diagnostic Methods of Rotating Machines and Influence Factors Based on Existing Testing Products." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-277635.
Повний текст джерелаАнотація:
This thesis summarizes established methods for electrical diagnostics of the insulationof large rotating electrical machines, i.e. generators and large motorsworking above the low-voltage range. It then investigates the possibility ofusing some existing diagnostic instruments, not specically intended for machineinsulation, for performing standard tests on a certain type and range ofthe rotating machines. The summary of general diagnostic methods for rotatingmachinery includes the traditional methods and currently used methodsin industry. It considers what types of the defects can be detected, and theinuence of the applied voltage magnitudes and frequencies, etc. Then thereis a literature study of several recent or developing technologies such as on-linemonitoring and frequency response analysis, to investigate the possible futuredevelopment of the diagnostic methods that have practical applications duringmanufacturing and operation of rotating machinery for a more accurateand timely assessment. Possible modications to testing devices to suit themmore to machine insulation are investigated. A study of three market-existingdevices summarizes the machine diagnostic tests that they could be used for.Finally, an experimental study on a stator coil rated 7 kV is reported, and itsresults are used to analyze the inuence of the test factors such as frequencydependency, for future investigation.Denna avhandling sammanfattar etablerade metoder för elektrisk diagnos-tik av isolering hos stora roterande elektriska maskiner, dvs generatorer och stora motorer med märkspänningar högre än lågspänning. Därefter undersöks möjligheten att använda vissa befintliga diagnostiska instrument, som inte är särskilt avsedda för maskinisolering, för att utföra standardtester på roterande maskinerna. I sammanfattningen av diagnostiska metoder för roterande maskiner ingår traditionella metoder och för närvarande använda metoder inom industrin. Den anser vilka typer av defekter kan upptäckas, och påverkan av de tillämpade spännings magnituder och frekvenser, etc. En litteraturstudieomfattar flera nya eller utvecklande teknologier såsom on-line övervakningoch frekvensresponsanalys, för att undersöka den möjliga framtida utvecklingen av de diagnostiska metoder som har praktiska tillämpningar under tillverkning och drift av roterande maskiner för en mer exakt och punktlig bedömning. Möjliga modifieringar av provningsanordningar som passar dem mer för maskin isolering undersöks. study av tre marknadsföra-existerande apparater sammanfattar de bearbeta med maskin diagnostiska testar att de kunde användas för. En experimentell studie på en 7 kV statorlindning rapporteras, och dess resultat används för att analysera påverkan av test faktorersåsom frekvensberoendet av resultaten, för framtida utredning.
14
Khan, Abid Ali, and Zaka Ullah Muhammad. "Exploring the Accuracy of Existing Effort Estimation Methods for Distributed Software Projects-Two Case Studies." Thesis, Blekinge Tekniska Högskola, Sektionen för datavetenskap och kommunikation, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-4126.
Повний текст джерелаАнотація:
The term “Globalization” brought many challenges with itself in the field of software development. The challenge of accurate effort estimation in GSD is one among them. When talking about effort estimation, the discussion starts for effort estimation methods. There are a number of effort estimation methods available. Existing effort estimation methods used for co-located projects are might not enough capable to estimate effort for distributed projects. This is why; ratio of failure of GSD projects is high. It is important to calibrate existing methods or invent new with respect to GSD environment. This thesis is an attempt to explore the accuracy of effort estimation methods for distributed projects. For this purpose, the authors selected three estimation approaches: COCOMO II, SLIM and ISBSG. COCOMO II and SLIM are two well known effort estimation methods, whereas, ISBSG is used to check the trend of a project depending upon its (ISBSG’s) repository. The selection of the methods and approaches was based on their popularity and advantages over other methods/approaches. Two finished projects from two different organizations were selected and analyzed as case studies. The results indicated that effort estimation with COCOMO II deviated 15.97 % for project A and 9.71% for project B. Whereas, SLIM showed the deviation of 4.17% for project A and 10.86 % for project B. Thus, the authors concluded that both methods underestimated the effort in the studied cases. Furthermore, factors that might cause deviation are discussed and several solutions are recommended. Particularly, the authors state that existing effort estimation methods can be used for GSD projects but they need calibration by considering GSD factors to achieve accurate results. This calibration will help in process improvement of effort estimation.
15
Dogan, Onur. "Multistage Seismic Assessment Methods For Existing Reinforced Concrete Buildings And Their Applicability For Retrofitting Cost Estimation." Master's thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615470/index.pdf.
Повний текст джерелаАнотація:
When the huge building stock in Turkey is considered, it is practically impossible to carry out detailed structural analyses for all of the buildings. In order to cope with the seismic safety evaluation of a large number of existing buildings, it is necessary to use simplified techniques, which can predict the seismic vulnerability of the existing buildings in a relatively short time. The comprehensive structural data compiled for the 48 different reinforced concrete buildings contain full information on their structural characteristics before and after retrofitting and are used in this study.
The first basic goal of the study is to develop a procedure through which the building stock under consideration can be classified as &ldquosafe&rdquo
or &ldquo
unsafe&rdquo
according to the current Turkish Seismic Code. The classification procedure is based on discriminant analysis. The cross-sectional area of the load-bearing members of a building and its preliminary assessment score are selected as the discriminator variables. The second and ultimate basic goal of the study is to propose a method through which the minimum retrofitting cost for satisfying the provisions of the Turkish Seismic Code can be estimated. A quick and uncostly assessment of retrofitting cost estimates based on the procedure described in this thesis will provide a useful input for decisions concerning whether a seismically &ldquo
unsafe&rdquo
building should be rebuilt or retrofitted. Such a situation will save time, labor and money, when it is used for the evaluation of building stocks involving large number of buildings and also in urban transformation operations.
16
Fossum, Heidi. "Coordinated freight logistics in existing city districts- Evaluation of methods for calculating energy and environmental effects." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-84166.
Повний текст джерелаАнотація:
Norra Djurgårdsstaden is the largest ongoing construction project in Sweden and is planned to be completed in 2030. The city district is situated in north-eastern Stockholm, in a former industrial area where approximately 12 000 new homes and 35 000 workplaces are planned. The city district focuses strongly on reducing energy consumption and the negative impacts on the environment. One idea for realizing this goal is to implement coordinated freight logistics. This can be accomplished by building a consolidation centre where goods from different logistics companies and freight carriers can be loaded together on the same delivery vehicles and then be delivered in the same area in Norra Djurgårdsstaden. The purpose of this master thesis is to evaluate five earlier evaluation reports on consolidation centres. Based on these evaluation reports and other relevant literature, it is recommended how a coordinated freight logistic project should be organized in Norra Djurgårdsstaden and how the impact on the environment and energy consumption should be calculated. The evaluation reports are from the logistic centre in the Old Town of Stockholm, the pilot project Samlic in Linköping, the urban consolidation centre in Norwich, the micro-consolidation centre in London and several urban logistic practices in Utrecht. A thorough comparative analysis of the five different evaluation reports has looked at the initiators and the stakeholders, the delivery situation before and after the implementation of the consolidation centre as well as done a deeper evaluation analysis of all the evaluation reports. The comparative analysis showed that the consolidation centres have had a positive effect on decreasing the number of delivery vehicles in the city district and thereby reducing the emissions and the energy consumption from the delivery vehicles. Based on the comparative analysis and other literature it is suggested that the initiative to build a consolidation centre in Norra Djurgårdsstaden has to come from the City of Stockholm. The stakeholders should be the City of Stockholm, logistics companies, freight companies, the different businesses in the area and the Ports of Stockholm. To encourage even more businesses to have deliveries from the consolidation centre and get more environmentally friendly delivery vehicles in the city district it might be necessary to use several management control instruments. Examples of control instruments are environmental zones, time windows and implement different restrictions on the delivery vehicles. It is essential to gather information about the delivery vehicles in the city district to estimate emissions and the energy consumption. The collection of data from the delivery vehicles can be gathered from consignment notes, driver notes, invoice data or statistics of the number of vehicles that have delivered goods in the city centre from freight and logistics companies. Then the delivery vehicles impact on energy consumption and the environment can be estimated with the computer tool Network of transports and environment (NTM-method).Norra Djurgårdsstaden är det största pågående byggprojektet i Sverige och är planerat att slutföras under 2030. Stadsdelen ligger i nordöstra Stockholm, i ett före detta industriområde där cirka 12 000 nya bostäder och 35 000 arbetsplatser är planerade att byggas. Stadsdelen har ett starkt fokus på att minska miljöeffekterna och påverkan av energianvändningen. En av idéerna för att uppfylla detta är att införa samordnad varulogistik. Detta kan göras genom att bygga ett logistikcenter där gods från olika logistikföretag och godstransportörer kan lastas på samma leveransfordon och sedan levereras inom samma område i Norra Djurgårdsstaden. Syftet med detta examensarbete är att utvärdera fem tidigare utvärderingsrapporter om logistikcenter. Med hjälp av dessa utvärderingsrapporter och annan litteratur ges det förslag på hur ett projekt inom samordnad varulogistik kan organiseras i Norra Djurgårdsstaden och hur miljöpåverkan och energiförbrukning från leveransfordonen kan beräknas. Utvärderingsrapporterna kommer från logistikcentret i Gamla Stan i Stockholm, pilotprojektet Samlic i Linköping, logistikcentret i Norwich, mikro-logistikcentret i London och olika logistikmetoder i Utrecht. En noggrann jämförande analys av de fem olika utvärderingsrapporterna har undersökt initiativtagare och intressenter, leveranssituationerna före och efter uppförandet av logistikcentren samt gjort en fördjupad utvärderingsanalys av samtliga utvärderingsrapporter. Den jämförande analysen visar att införandet av logistikcenter har haft en positiv effekt för att minska antalet leveransfordon i stadsdelen och därmed inneburit minskade utsläpp och lägre energianvändning för leveransfordonen. Baserad på den komparativa analysen och annan litteratur föreslås det att initiativet i Norra Djurgårdsstaden måste komma från Stockholms stad. Intressenterna bör vara Stockholms Stad, logistikföretag, godstransportörer, de olika företagen i området och Stockholms Hamnar. För att få fler företag att använda logistikcentret samt att få miljövänligare leveransfordon i stadsdelen kan det vara nödvändigt att använda flera styrmedel. Exempel på styrmedel är miljözoner, tidsfönster och att införa olika begränsningar på leveransfordon. Det är väsentligt att samla information om leveransfordonen i stadsdelen för att beräkna utsläpp och energianvändning. Insamlingen av data från leveransfordon kan hämtas från fraktsedlar, fakturaunderlag eller statistik över antalet fordon som har levererat varor i stadsdelen från frakt-och logistikföretag. Då kan miljö- och energieffekterna från leveransfordonen beräknas med dataverktyget Nätverket för transporter och miljö (NTM-metoden).
17
Guedez, Rafael. "Implementation And Validation Of Loss Prediction Methods To An Existing One Dimensional Axial Turbine Design Program." Thesis, KTH, Kraft- och värmeteknologi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-154033.
Повний текст джерелаАнотація:
One of the early steps in axial turbine design is the use of one-dimensional (1D) mean line calculations to predict the turbine performance and estimate the principal geometric parameters, such as radius and blade heights, that will be needed in further computational fluid dynamic (CFD) studies. This 1D analysis is based on the estimation of the aerodynamic losses expressed as a function of simple blade parameters and the velocity triangles. In this regard, there exist different loss correlations widely used in literature to estimate these losses but at the same time there is a lack of information regarding differentiation between them. Thereafter, the objective in this work was to judge and compare the behaviors of the Kacker- Okapuu, Craig-Cox and Denton loss correlations, all of them widely-used in turbine performance prediction. Present work shows the implementation of these different loss correlations on an existing 1D mean line numerical tool, LUAX-T. Subsequently, once implemented, the correlations were compared and analyzed by the use of a validation process and performing a parametric study. The results show that similar key parameters such as the flow turning, solidity and aspect ratio rule the different loss mechanisms in each correlation. On the other hand, the parametric study shows that the correlations are in agreement with the theory and give similar trends for performance prediction even though they all predict different values of efficiency for the same turbine stage. Moreover, the validation process show the correlations were found to be accurate enough when comparing against two different sets of experimental data. However, it was also proved that the models are only accurate if used within the range of applicability they were developed for, hence a complete knowledge of the limitations of each correlation should be known prior to using them. Finally, the extension of the one-dimensional mean line numerical tool LUAX-T will serve to perform further studies related to turbine design, as there are very few non-confidential turbomachinery design tools available for teaching or researching. Furthermore, a parametric study tool was also developed as part of the program. This last extension and the loss implementation codes are described in this work.
18
Goede, William Gunter. "Pervious concrete investigation into structural performance and evaluation of the applicability of existing thickness design methods /." Pullman, Wash. : Washington State University, 2009. http://www.dissertations.wsu.edu/Thesis/Fall2009/w_goede_112409.pdf.
Повний текст джерелаАнотація:
Thesis (M.S. in civil engineering)--Washington State University, December 2009.Title from PDF title page (viewed on Jan. 22, 2010). "Department of Civil and Environmental Engineering." Includes bibliographical references (p. 98-102).
19
Menos-Aikateriniadis, Christoforos. "Methods to identify broken neutral fault in LV distribution grids by using existing smart meters infrastructure." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-264280.
Повний текст джерелаАнотація:
The vast majority of Swedish utility network customers for nearly a decade has been supported by Advanced Metering Management (AMM) systems, including smart meters. Vattenfall´s modern smart meters enable a new level of monitoring for LV networks and improved MV network supervision. Therefore, improving power quality, fault detection and outage management functionalities are just some of the areas that smart metering systems can contribute to. One of the typical faults in LV networks is when the neutral conductor is broken or loose at either the network or the load side of the meter. The situation of lost continuity of the neutral conductor may damage the connected load or create hazardous touch voltages at equipment body. Since there is a big potential to supervise LV networks with assistance of the end-customer smart meters, Vattenfall wants to take further advantage of such data. The value is to bring in event information from the smart meters in order to contribute to a better and more efficient monitoring of the LV and MV network. The goal of this project is to analyze the behavior of the LV grid under broken neutral fault conditions and propose effective methods (algorithms) to identify loose neutral situation based on end-customer meter readings (disturbance events). Based on previous literature review and studies conducted for broken neutral fault detection, phase to neutral voltages has been proved that can be a useful indicator to detect the fault, since there is a clear pattern during the fault. However, the voltages-based method is not always effective, such as during periods when the load is almost balanced among the three phases or when the load magnitude is not high enough. This is the reason why other electrical parameters could be useful as well to detect the fault, except from the phase to neutral voltages. This study adds a great value into the study of broken neutral fault in low voltage grids since no previous work has been found where dynamic load profiles are modelled and simulated. The broken neutral fault study has started with the creation of dynamic load profiles that has been used in MATLAB/SIMULINK to model inductive linear load with or without the integration of single-phase PV assets. Furthermore, non-linear load has been investigated during BN fault in a single-customer model, where three case studies with different percentages of nonlinear load integration into the system have been included. Later, a 7-customer low voltage rural grid has been modelled where not only broken neutral but also phase loss and short circuit faults have been modeled and simulated. 9 different locations for Broken Neutral and Phase Loss faults and 7 locations for Short Circuit fault, 4 seasons with different load profiles and 4 different PV integration combinations with single and three-phase assets were considered. It has been proved that the combination of different electrical parameters and not only phase to neutral voltages can improve significantly the detection of broken neutral fault, not only on the DSO side but also at the customer side, with the use of smart meter data. Last but not least, part of this study has been to use the data that have been produced from the simulations to train a machine learning model that can accurately detect broken neutral fault. For that reason, a Proof of Concept using different machine learning classification methods as well as neural networks have been trained and tested, based on large amount of data, has been proposed. Bagged decision trees have been found as the most accurate method. It is important to highlight that due to data confidentiality issues, specific values and thresholds that have been set in the algorithms that are currently used or proposed cannot be published.
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Severholt, Josefine. "Generic 6-DOF Added Mass Formulation for Arbitrary Underwater Vehicles based on Existing Semi-Empirical Methods." Thesis, KTH, Marina system, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-211170.
Повний текст джерелаАнотація:
The KTH Maritime Robotics Lab is developing a simulation framework for experimental autonomous underwater vehicles in MATLAB and Simulink. This project has developed a formulation for added mass of the vehicle, to be implemented in this simulation frame-work. The requirements of the solution is that it should require low computational power, be a general formulation applicable on arbitrarily shaped vehicles and be veri-fied against literature. Different existing methods and formulations for primitive bodies have been investigated, and combining these methods has resulted in a simplified but adequate method for calculating the added mass of arbitrarily shaped hulls and control surfaces, that is easy to implement in the existing simulation framework. The method has been verified by calculating added mass coefficients for two existing vehicles, and comparing the values to the coefficients already calculated for the vehicles in question. Some limitations have been identified, such as the interaction effects between compo-nents of the vehicle not being taken into account. To determine the extent of the errors due to this simplification and to fully validate and verify the model, future work in the form of CFD calculations or experiments on added mass measurements need to be con-ducted. There is also an uncertainty in the calculation of the coupled coefficients m26 and m35, and results on these coefficients should be handled with care.
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Ale, Anil Kumar. "Comparison and Evaluation of Existing Analog Circuit Simulator using Sigma-Delta Modulator." Thesis, University of North Texas, 2006. https://digital.library.unt.edu/ark:/67531/metadc5422/.
Повний текст джерелаАнотація:
In the world of VLSI (very large scale integration) technology, there are many different types of circuit simulators that are used to design and predict the circuit behavior before actual fabrication of the circuit. In this thesis, I compared and evaluated existing circuit simulators by considering standard benchmark circuits. The circuit simulators which I evaluated and explored are Ngspice, Tclspice, Winspice (open source) and Spectre® (commercial). I also tested standard benchmarks using these circuit simulators and compared their outputs. The simulators are evaluated using design metrics in order to quantify their performance and identify efficient circuit simulators. In addition, I designed a sigma-delta modulator and its individual components using the analog behavioral language Verilog-A. Initially, I performed simulations of individual components of the sigma-delta modulator and later of the whole system. Finally, CMOS (complementary metal-oxide semiconductor) transistor-level circuits were designed for the differential amplifier, operational amplifier and comparator of the modulator.
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Adamowicz, Lukas. "Functional Rotation Axis Based Approach for Estimating Hip Joint Angles Using Wearable Inertial Sensors: Comparison to Existing Methods." ScholarWorks @ UVM, 2019. https://scholarworks.uvm.edu/graddis/1044.
Повний текст джерелаАнотація:
Wearable sensors are at the heart of the digital health revolution. Integral to the use of these sensors for monitoring conditions impacting balance and mobility are accurate estimates of joint angles. To this end a simple and novel method of estimating hip joint angles from small wearable magnetic and inertial sensors is proposed and its performance is established relative to optical motion capture in a sample of human subjects. Improving upon previous work, this approach does not require precise sensor placement or specific calibration motions, thereby easing deployment outside of the research laboratory. Specific innovations include the determination of sensor to segment rotations based on functionally determined joint centers, and the development of a novel filtering algorithm for estimating the relative orientation of adjacent body segments. Hip joint angles and range of motion determined from the proposed approach and an existing method are compared to those from an optical motion capture system during walking at a variety of speeds and tasks designed to exercise the hip through its full range of motion. Results show that the proposed approach estimates flexion/extension angle more accurately (RMSE from 7.08 to 7.29 deg) than the existing method (RMSE from 11.64 deg to 14.33 deg), with similar performance for the other anatomical axes. Agreement of each method with optical motion capture is further characterized by considering correlation and regression analyses. Mean ranges of motion for the proposed method are not largely different from those reported by motion capture, and showed similar values to the existing method. Results indicate that this algorithm provides a promising approach for estimating hip joint angles using wearable inertial sensors, and would allow for use outside of constrained research laboratories.
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Patton, George Allen. "Supporting and Securing Personal Mobile Devices Within an Existing Information Technology Environment." ScholarWorks, 2014. https://scholarworks.waldenu.edu/dissertations/124.
Повний текст джерелаАнотація:
Personal mobile devices are becoming integrated into the daily operations of business. Managers are realizing that employees who are allowed to use personal mobile devices to access corporate information systems may reduce costs as users buy their own devices. The problem was that managers have a limited understanding of the need to secure or support personal mobile devices. The purpose of this survey study was to examine the relationship between employees' desire to use personal mobile devices and corporation needs for security and support. Hypotheses were tested by examining the relationships between the requirement to support and secure personal mobile devices as the independent variables and the desire to use personal mobile devices as the dependent variable. The theoretical framework for the study included the IT product life-cycle management theory, IT security-management theory, and IT strategic-management theory. Survey data were collected from a convenience sample of 108 employees at the study-site organization from an estimated population of 170. Basic linear regression analyses performed found a correlation coefficient of 0.905 indicating the variables are highly correlated. This finding indicates that if personal mobile devices are given access to corporate information systems, then support and security will be necessary for successful operations. If the relationship between internal factors and operational success is clearly documented, organizations may be able to use the data to justify incorporating personal mobile devices within their own corporate information system to reduce costs, improve productivity, and increase employee satisfaction, thereby making a positive contribution to society.
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Reeping, David Patrick. "Identifying Asymmetries in Web-based Transfer Student Information that is Believed to be Correct using Fully Integrated Mixed Methods." Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/95944.
Повний текст джерелаАнотація:
Transfer between community colleges and four-year institutions has become more common as student mobility increases. Accordingly, the higher education system has coped with the fluidity by establishing articulation agreements that facilitate pathways from one institution to another. The forward-facing policies and guides to inform students on those pathways are known to be complicated, leading to the development of web-based tools like Transferology to help students navigate the system. Still, credit loss is common, whether through misunderstandings, lack of awareness, or changing degree plans. A proliferation of literature examines the experiences of transfer students and other agents in the process like community college advisors, but few pieces interrogate the underlying website structures that facilitate those experiences as the unit of analysis.
Information related to facilitating transfer from one institution to another is often fragmented across multiple webpages or policies and uses language not optimal for communicating with students – creating what are called "information asymmetries" between the students and institutions. The premise of an exchange having information asymmetries is that one or more parties in the exchange have more or better information than the others, leading to an imbalance in power. In the case of higher education, transfer students – and their advisors by extension – can be subjected to manipulation by the invisible hands of the four-year institutions through language gaps and scattered sources of information. Accordingly, this dissertation explored four-year university websites, a major point of contact students have with information on transfer, to address the following main research question: "How are information asymmetries in curricular policies/procedures apparent for engineering students on institutional webpages in terms of language and fragmentation?" The subsequent research question synthesized the results of the first question: "Looking across information asymmetry measures, what are the different narratives of information asymmetry that integrate themes of language and fragmentation across institutions?"
A fully integrated mixed methods design using all existing data was employed to address the two research questions. A stratified random sample was taken with respect to institution size based on their Carnegie classifications (n = 38). The collection of relevant public webpages based on a set of keywords from the sampled institutions was transformed into three network measures - hierarchy, centrality, and nonlinear – that were used in cluster analyses to group the institutions based on their information structures. Sequential mixed methods sampling was used to choose institutions purposefully from each cluster based on notable features recorded during the first stage of data collection. Two-cycle coding followed the cluster analysis by elaborating on the networks formed during data collection. I used joint displays to organize the networks and In-Vivo codes in the same picture and develop themes related to fragmentation and language simultaneously.
K-means and K-medoids cluster methods both produced the same four cluster solution illustrating one aspect of information asymmetries through fragmentation. The clustering solution highlighted four major network patterns, plus one cluster mixing two of the patterns: 1) linear browsing, 2) centralized expansive browsing, 3) branched browsing, and 4) mixed browsing. Further qualitative analysis of the sampled institutions revealed several types of missteps where information is obscured through language or dispersed in the network. I explored a subset of 16 institutions and identified four themes related to fragmentation (unlinked divergence, progressive disclosure, lack of uniformity, and neighborhood linking) and six themes related to language (hedging transferability and applicability, legalese handwaving, building rapport, exclusivity, deviance from common practice, and defining terms). The missteps were contextualized further using six narratives with institutional examples.
This work characterized the information design for transfer students as a messy web of loosely connected structures with language that complicates understanding. Integrated narratives illustrate a landscape of loosely coupled information structures that become more expansive as state initiatives interact with already existing local agreements. Moreover, institutional websites describing transfer processes use communication strategies similar to private companies writing online privacy policies. In light of the themes of information asymmetries, opportunities for supporting transfer were highlighted. For example, institutions are encouraged to create visual representations of the transfer credit process, ensure terms are defined upfront while minimizing jargon, and avoid linking to information that is easily summarizable on the current page.
This research would be of interest to institutions looking to improve the presentation of their transfer information by critically examining their designs for the missteps described here. In addition, engineering education practitioners and researchers studying transfer student pathways and experiences will find the results of interest – especially in considering how to support the students despite the large information gaps. Finally, those looking to implement a fully integrated mixed methods design or use existing/archival data in their own context will find the use of mixing strategies of interest.Doctor of Philosophy
Transfer between community colleges and four-year institutions has become more common as student mobility increases, especially for engineering. Institutions have coped with this inter-institutional movement by establishing agreements with each other that facilitate pathways between programs. The forward-facing policies and guides to inform students on such pathways are known to be complicated, leading to the development of web-based tools like Transferology to help students navigate the system. Despite these advances, transfer students continue to struggle in their information search. The purpose of this dissertation was to describe the extent to which information for engineering transfer students is scattered across multiple web-based sources and written in a manner not conducive to understanding. I used a fully integrated mixed methods design to create narratives capturing the interactions between the more quantitative idea of scatter using network analysis and the more qualitative aspect of language-use using visually based two-cycle coding across 38 U.S. four-year institutions. All data was readily available online, which were transformed and combined using several mixing strategies to form integrated stories of information asymmetries. The resulting narratives characterized the information design for transfer students as a messy web of loosely connected structures with language that complicates understanding. Moreover, institutional websites describing transfer processes use communication strategies similar to private companies writing online privacy policies. In light of the themes of information asymmetries, opportunities for supporting transfer were highlighted. This work will be of interest to those interested in engineering transfer student experiences and pathways. Also, those looking to implement fully integrated mixed methods approaches or make extensive use of existing data, especially mixing during analysis, will see strategies applicable in their own work.
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Lennermark, Desirée, Victoria Bjellerup, Lisa Bäckström, and Lisen Wedman. "Demolish or Refurbish an Existing Building? : A bachelor thesis on the climate impact of different methods of renewing a building." Thesis, Uppsala universitet, Institutionen för samhällsbyggnad och industriell teknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-412278.
Повний текст джерелаАнотація:
The purpose of this bachelor thesis is to evaluate different alternatives of renewal regarding an already existing building. The case study building is located in the Ulleråker area in Uppsala, Sweden and is an old mental hospital building from the 1950’s which Uppsala Municipality wishes to restore as part of a bigger investment in the neighborhood. The different alternatives that will be investigated are refurbishment, with different insulation thickness, and a complete demolition and reconstruction of a new building with either wood or concrete. Carbon dioxide emissions connected to buildings will be calculated and analyzed as two elements, one being embodied carbon dioxide, and one being energy usage. Other aspects of interest, the economy and cultural values of the area, will be discussed. To estimate the amount of CO2 emissions, several life cycle assessments will be executed through the software One Click LCA (2015). Calculations will be done by hand in order to estimate the energy usage. Information and data are partly obtained from Uppsala Municipality, partly from literature and available resources. The results show that each option has a different advantage, the refurbishment resulting in considerably lower embodied carbon (114 kg CO2e/m2) but higher energy usage (95 kWh/m2 per year) as compared to the new concrete construction with larger amount of embodied carbon (279 kg CO2e/m2) but lower energy usage (44 kWh/m2 per year). This leads to a conclusion showing that a deep refurbishment is the best option regarding both embodied carbon and energy usage.
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Corron, Louise. "Juvenile age estimation in physical anthropology : a critical review of existing methods and the application of two standardised methodological approaches." Thesis, Aix-Marseille, 2016. http://www.theses.fr/2016AIXM5015.
Повний текст джерелаАнотація:
L’âge est un paramètre du profil biologique des individus immatures que l’on peut estimer de manière suffisamment fiable et précise. Les méthodes utilisées ne respectent pas toutes des critères méthodologiques valides et sont donc relativement critiquables. Une analyse de 256 méthodes utilisées en anthropologie biologique a qualifié et quantifié les biais et limites de construction et d’application et propose une classification objective des méthodes mettant en évidence celles qui sont valides. Cette analyse a servi à élaborer le protocole d’une nouvelle méthode standardisée. Les surfaces de l’os iliaque, la cinquième vertèbre lombaire et la clavicule ont été reconstruites à partir de CT scans avec le logiciel AVIZO®. Des variables biométriques et non-biométriques ont été obtenues sur ces trois os. Des équations non-paramétriques de type Multivariate Adaptive Regression Splines (MARS) prédisant l’âge à partir des variables ont été calculées avec le logiciel statistique R®. Les variables iliaques, les hauteurs latérales vertébrales et la longueur maximale de la clavicule ont donné les meilleures prédictions de l’âge. Aucune différence significative entre les âges réels et estimés n'a été observée sur trois échantillons-test de Marseille, Toulouse et la collection ostéologique Luis Lopes. Les résultats sont meilleurs ou comparables à ceux d’autres méthodes. Des probabilités d’âge en fonction des indicateurs non-biométriques ont donné des résultats suffisamment fiables, mais pas assez précis pour être valides. Notre méthode d’estimation de l’âge a 95% de fiabilité et 90% de justesse. Elle est statistiquement valide et utilisable en contexte médico-légal et archéologiqueAge is one of the parameters of a juvenile biological profile that can be estimated with sufficient reliability and precision. Many juvenile age estimation methods do not follow valid methodological criteria. A critical analysis of 256 methods used in physical anthropology was done to qualify and quantify biases and limitations of method construction and application. An objective and practical classification of methods highlighting those respecting valid sampling protocols and statistical criteria was constructed. This analysis provided a protocol for a new standardised juvenile age estimation method. Surfaces of the iliac bone, fifth lumbar vertebra and clavicle were reconstructed from CT scans of individuals from Marseilles using the AVIZO® software. Biometric growth variables and non-biometric maturation indicators were taken on the three bones. Non-parametric Multivariate Adaptive Regression Splines (MARS) models were calculated with the R® software to predict age using the variables. The best models were obtained with variables of the ilium, left and right vertebral heights and maximal clavicular length. These models were validated on three samples from Marseilles, Toulouse and the Luis Lopes osteological collection. They were comparable or better than other age estimation methods. Posterior probabilities of age were calculated using maturation stages of four iliac epiphyses. Results were reliable, but precision was too low for validation. Our new juvenile age estimation method can predict age with 95% reliability and 90% accuracy. It is standardised, statistically valid, integrates changes in variability and is applicable in a forensic or bioarchaeological context
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Alhajali, Abdallah. "Analysis of existing offshore structures considering structural damage to investigate a vertical axis wind tower." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.
Знайти повний текст джерелаАнотація:
The most common offshore structures are the Jackets which are tools used to extract the oil and natural gas in relative low water depth particularly exist in Adriatic Sea and a lot of them have been constructed in the last 50 years. When the offshore oil and gas resources exhaust, these structures must be replaced to another region containing underground resources or removed if reaching the design life, furthermore, another solution can be considered: changing life of the future working of these platforms by applying renewable energy and alternating them into offshore wind towers. This thesis proposes to study and examine the stiffness matrix of an existing Jacket which
consider damaged components for reliability analysis of offshore installations.
In this research it was used the 8-step simplified methodology which includes several step to analyze the ability of the offshore jacket structure to examine if it is tolerable to endure the effect of wind or wave loads (environmental forces) more than usual by simulating a minimizing of the stiffness matrix using several random cases which they are ten cases, firstly minimizing in the x direction ( 5 cases) and lastly in y direction and then
comparing each of these cases with the original case .It was presented two of the most critical cases to show the effect of each step one in x direction and the other in y direction
consequently. At the end it is showed that even the structure jacket is 50 years old it is standable and bearable to face some reduction of its stiffness
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Strutt, Christina Magdelena. "Property and valuation methods in new media: an examination of existing theories and practices and their applicability to new media ventures." Thesis, University of Cape Town, 2013. http://hdl.handle.net/11427/11570.
Повний текст джерелаАнотація:
Includes abstract.Includes bibliographical references.
New media has become a major part of our daily routine and influences both our social interactions and the ways in which we conduct business. Not only does it provide new business tools to existing business models, it has also created a platform from which new forms of commerce and exchange can emerge. These novel enterprises are largely unrestrained by the capital and regulatory requirements of traditional forms of business and have other peculiar characteristics that may challenge our current views on ‘property’ and ‘ownership’. The potential of new media to compete with, and potentially displace, players in the ‘real economy’ requires a further examination of the valuation methods currently applied to business ventures, in particular those in which intellectual property and intangible assets are a major component. It is beyond the scope of this dissertation to propose alternative methods of valuing intellectual property in the new media environment. It does, however, aim to consider various theories on property and traditional valuation methods in light of this new phenomena.
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Malik, Muhammad Imran [Verfasser], Andreas [Akademischer Betreuer] Dengel, and Marcus [Akademischer Betreuer] Liwicki. "Automatic Signature Verification: Bridging the Gap between Existing Pattern Recognition Methods and Forensic Science / Muhammad Imran Malik. Betreuer: Andreas Dengel ; Marcus Liwicki." Kaiserslautern : Technische Universität Kaiserslautern, 2015. http://d-nb.info/1080521720/34.
Повний текст джерела
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Holbová, Monika. "Diagnostika železobetonové konstrukce." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265583.
Повний текст джерелаАнотація:
This diploma thesis deals with the building survey and diagnosis of the station building of a railway station in Vítkovice. It describes process of survey and evaluation of existing reinforced concrete structures and used diagnostic methods. The survey of the object is described in the practical part of the thesis, which involves location of testing spots, taking the samples for testing from the structure, laboratory testing and evaluation of the results – determination of compressive strength of concrete with classification of concrete and elastic modulus. The last part includes static calculation of selected part of the structure.
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Kingston, Denise Jane. "A mixed methods study : evaluating the impact of a bespoke professional development based on an analysis of existing quality in one local authority." Thesis, University College London (University of London), 2017. http://discovery.ucl.ac.uk/1551541/.
Повний текст джерелаАнотація:
A four year quasi-experimental, repeated measures, mixed methods study was run in one Local Authority in England. Designed to improve early childhood quality and support policy development; it aimed to capture: first, the quality of all (279) pre-school settings within the county; second, the impact of a bespoke professional development (PD) on a sample of fifty private, voluntary and independent settings with matched controls. A database of quality, pre- and post- intervention, was established using Early Childhood Environment Rating Scales (ERS) [ECERS-R and E, (Harms et al., 2005; Sylva et al., 2003)], interviews, focus groups and questionnaires provided additional information. The PD was devised to support educators' implementing: • collaborative, evidence-based practice, • their role, including interpreting and using the Curriculum Guidance for the Foundation Stage (DfEE, 2000), • effective practice and research on: o the early Home Learning Environment, o children's behaviour for learning, o engaging with sustained shared thinking and o quality improvement processes. The PD data (ERS scores, focus groups, interviews and questionnaire responses) suggested that a short evidence-based PD can impact on practice predictably and consistently. Overall, quality ERS scores suggested the need for additional support and investment. Initial quality ratings (at pre-test) were predictive of modest improvements following the PD (at post-test). Ensuring the PD was accessible to all educators was an important part of the process. Where quality was extremely low at the beginning of the PD, no real progress was found, suggesting that this group of settings was unique and required more than the PD could offer. Bronfenbrenner's Bio-ecological Model of Human Development (2005) was applied to the educators' learning during the study. It supported: first, consideration of the interrelated multi-level systems that impacted on the educators' learning; and, second, the development of a new model considering the process of learning they underwent during the PD.
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Akoma, Onyekachi D. "A study of the role of information systems on existing building delivery methods : towards better coordination and flexibility for the integration of new systems and products." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/62925.
Повний текст джерела
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Leavy, Breiffni. "Fall-Related Hip Fracture : Predisposing and Precipitating Factors." Doctoral thesis, Uppsala universitet, Institutionen för kirurgiska vetenskaper, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-247286.
Повний текст джерелаАнотація:
A physically inactive lifestyle is a predisposing risk factor for fall-related hip fracture. The circumstances, or precipitating factors, surrounding hip fractures are, however, not well understood, a factor of relevance for Swedish adults who have one of the highest hip fracture risks in the world. The aims of this thesis, therefore, were: to explore perceptions of physical activity (PA) among older adults, to describe the circumstances surrounding hip fracture events and the health characteristics of those who experience them. Four observational studies were conducted involving qualitative, epidemiological and mixed method designs. Participants in study I were recruited from community settings in Stockholm and Dublin (n=30). Studies II-IV (sample sizes, n=484, n=125, n=477) were based on a population-based sample of people admitted to Uppsala University hospital due to hip fracture. Study IV also incorporated the background population of Uppsala county in 2010 (n=117 494). Analysis of PA perceptions in study I revealed that PA which is functional nature is perceived as most meaningful among certain participants. The uptake of PA in later years was a means of creating a new self-identify and being active in outdoor environments was an important culture-specific motivator to PA among Swedish participants. Analysis of hip fractures patterns in studies II-III showed that: hip fractures among psychotropic drug users were twice as likely to occur during night-time hours compared to those occurring among people not receiving these drugs. Additionally, the fall-related hip fractures of community dwellers with poorest health and function tended to occur indoors during positional changes. In study IV, all categories of disease (according to the International Classification of Diseases, 10th Revision) were seen to be positively associated with hip fracture. Cardiovascular disease and previous injury (including previous fracture) posed the highest relative and absolute fracture risks. Detailed investigation of hip fracture circumstances reveal patterns in health and functional characteristics, which provide information regarding predisposing and precipitating factors for these events. This knowledge, in combination with findings regarding PA perceptions, can be used when identifying individuals at high risk for hip fracture and when tailoring fracture prevention at an individual level to those at risk.
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Zhan, Cheng Juan. "An Alternative Approach to Visualizing Stock Market Correlation Matrices- An Empirical study of forming portfolios that contain only small numbers of stocks using both existing and newly discovered visualization methods." Thesis, University of Canterbury. Economics and Finance, 2014. http://hdl.handle.net/10092/9649.
Повний текст джерелаАнотація:
The core of stock portfolio diversification is to pick stocks from different correlation clusters when forming portfolios. The result is that the chosen stocks will be only weakly correlated with each other. However, since correlation matrices are high dimensional, it is close to impossible to determine correlation clusters by simply looking at a correlation matrix. It is therefore common to regard industry groups as correlation clusters. In this thesis, we used three visualization methods namely Hierarchical Cluster Trees, Minimum Spanning Trees and neighbor-Net splits graphs to “collapse” correlation matrices’ high dimensional structures onto two-dimensional planes, and then assign stocks into different clusters to create the correlation clusters. We then simulated sets of portfolios where each set contains 1000 portfolios, and stocks in each of the portfolio were picked from the correlation clusters suggested by each of the three visualization methods and industry groups (another way of determine correlation clusters). The mean and variance distribution of each set of 1000 simulated portfolios gives us an indication of how well those clusters were determined.
The examinations were conducted on two sets of financial data. The first one is the 30 stocks in the Dow Jones Industrial average which contains relatively small number of stocks and the second one is the ASX 200 which contains relatively larger number of stocks. We found none of the methods studied consistently defined correlation clusters more efficiently than others in out-of-sample testing.
The thesis does contribute the finance literature in two ways. Firstly, it introduces the neighbor-Net method as an alternative way to visualize financial data’s underlying structures. Secondly, it used a novel “visualization
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Kirschbaum, Adam. "Hodnocení konstrukcí průmyslových objektů podle ČSN ISO 13822." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-240048.
Повний текст джерелаАнотація:
This diploma thesis deals with the evaluation of the constructions of the industrial buildings according to the ČSN ISO 13822 Standard. In the first, theoretical part, the procedures of research and evaluation of existing reinforced concrete constructions based on the ČSN ISO 13822 and ČSN 73 0038 Standards are described. Further, the theoretical part is focused on the diagnostic methods used during the evaluation of these constructions. The practical part focuses on the evaluation of the three industrial reinforced concrete buildings. It includes information about the building, the description of defects, diagnostics and the appraisal of measuring. The last part deals with a static calculation of selected parts of the supporting construction.
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Williams, Charles Addison Jr. "Numerical modeling of fault formation and the dynamics of existing faults." Diss., The University of Arizona, 1990. http://hdl.handle.net/10150/185125.
Повний текст джерелаАнотація:
This research is an investigation into two different aspects of the faulting process. The first part of the study focuses on the initial stages of fault formation, while the second analyzes the deformation produced by an existing fault. The section on fault formation is an attempt to determine whether slip on an existing fault has a significant effect on the formation of subsequent faults. A two-dimensional elastic finite element technique is used to examine the system of stresses produced by slip on an initial fault, assuming that deformation occurs either elastically or by brittle failure. A Mohr-Coulomb failure criterion is used to determine the most likely region of secondary fault initiation. A strain energy criterion is then used to find the preferred direction of fault propagation. The study on fault formation is subdivided into two sections representing two idealized tectonic environments: purely extensional and purely compressional. The section on extensional fault formation explains the prevalence of grabens in extensional tectonic regimes as a consequence of the stress perturbations due to slip on an initial normal fault. Slip on the initial fault produces a region of high proximity to failure at the surface of the downthrown block. A secondary fault would be expected to initiate in this region. The direction of propagation of this fault that most effectively relieves the shear stress (and therefore minimizes the total strain energy) is toward the initial fault, resulting in an antithetic orientation, or graben. The width of the graben is found to be controlled by the depth of the initial normal fault, rather than the depth to a change in material properties. The study of compressional fault formation indicates that, except for steeply-dipping faults, the presence of an initial thrust fault tends to suppress the formation of other faults in its vicinity. However, if a secondary fault initiates near an initial thrust fault, the direction in which it propagates will be influenced by the presence of the initial fault. The way in which it is influenced is dependent on the fault dip. The final part of this study examines the deformation produced by repeated earthquake cycles on the San Andreas fault in southern California. A three-dimensional, time-dependent kinematic finite element model is used to investigate the influence of slip distribution and rheological parameters on the predicted horizontal and vertical deformation. The models include depth-varying rheological properties and power-law viscoelastic behavior. The predicted deformation patterns are fairly sensitive to the parameters used in this study. Of particular importance is the calculation of vertical uplift rate since, in many cases, models that cannot be distinguished from each other on the basis of horizontal deformation may produce distinctive vertical uplift patterns.
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Halmay, Edit. "Formal method for the retrospective specification of the functionality of existing software systems." Thesis, London South Bank University, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329142.
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Mendoza, Patricia A. "An enhanced method for the existing bluetooth pairing protocol to avoid impersonation attacks." To access this resource online via ProQuest Dissertations and Theses @ UTEP, 2009. http://0-proquest.umi.com.lib.utep.edu/login?COPT=REJTPTU0YmImSU5UPTAmVkVSPTI=&clientId=2515.
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Sloupenský, David. "Stavební průzkum a hodnocení stavu konstrukce." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265706.
Повний текст джерелаАнотація:
The diploma thesis in theoretical section is focused on a brief overview of the methods used in the diagnostic of reinforced concrete structures. The practical part of this thesis deals with the diagnostics of the manufacturing reinforced concrete buildings in the complex Fatra Napajedla. This part will provide concrete strength of existing structures and will verify the reinforcement of individual elements of the structure by means of modern devices – radar and electromagnetic rebar locator. In the final section of this thesis will be performed static reports of selected parts of the structure.
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Pagander, Lisa, and Jason Read. "Is Problem-Based Learning (PBL) An Effective Teaching Method? : A Study Based on Existing Research." Thesis, Linköpings universitet, Institutionen för kultur och kommunikation, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-107712.
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Abstract The purpose of this paper is to examine the empirical research supporting the effectiveness, orineffectiveness of PBL as a teaching method. Secondly, if PBL is an effective method, what does researchsay about the relevance of PBL in connection to the Swedish secondary school curriculum. We took an indepth,critical look at the existing research to find any commonalities or any major contradictory findings.Results show that there is contradictory evidence regarding the effectiveness of PBL as a teachingmethod with the majority of support for PBL coming from the educational medicine field. Results also showthat very little research exists concerning how PBL relates to the guidelines set out in the Swedish Schoolcurriculum (GY11).After presenting the results we discuss the implications that PBL present as a teaching method, aswell as major problems encountered, and how these findings relate to the teaching profession in Sweden.Lastly, we discuss how further research could be beneficial to support the use of PBL.
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Challab, D. J. "A comparison of some methods of dynamically allocating co-existent flexible objects." Thesis, University of Reading, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.378190.
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Baker, Karl Phillip. "Incremental densification auctions : A politically viable method of producing infill housing in existing single-family neighborhoods." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/42418.
Повний текст джерелаАнотація:
Thesis (M.C.P.)--Massachusetts Institute of Technology, Dept. of Urban Studies and Planning, 2008.Includes bibliographical references (p. 147-155).
This paper examines the problem of convincing homeowners to accept new housing density in their neighborhoods. This paper proposes that densification that places additional housing units in preexisting single-family neighborhoods is socially desirable as a way of slowing sprawl, utilizing existing infrastructure, providing affordable housing, promoting consumer choice and slowing suburban decline. The paucity of such development currently occurring is argued to result primarily from restrictive land use regulation as there are strong indications that densification would otherwise be economically viable in many locations. This paper approaches the question of removing regulatory barriers from the perspective of devising a process that would effectively reduce homeowner apprehension about the effects of densification. Devising a system that explicitly regulates the pace of change and captures increases in land value attributable to densification is found to be essential to overcoming homeowner concerns about densification. Traditional land use tools are deemed inadequate to achieve these goals and thus it is proposed that local governments allocate densification rights through public auctions where the rights to densify are separate and distinct from any traditional real property ownership interest. This proposal for densification auctions is evaluated according to various legal restrictions courts and legislatures have imposed on the methods local governments may use to regulate land use. The proposed densification auction is found to potentially violate many of these legal rules. It is argued, however, that the underlying rationales supporting these legal restrictions cease to reason and therefore that they should be relaxed in the specific context of incremental densification.
by Karl Phillip Baker.
M.C.P.
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Bukvová, Alena. "Návrh změny organizační kultury." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2011. http://www.nusl.cz/ntk/nusl-222891.
Повний текст джерелаАнотація:
The master´s thesis deals with organizational culture and its effect on efficiency of VeSt servis, s.r.o. The aim of this paper was to analyse the content of organizational culture of the chosen company, to assess its content in relation to efficiency of the organization and based on the results of the completed survey the possibility of changing the real content of organizational culture to better comply with the desired content was suggested.
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Blixt, Jonathan, and Sara Joon. "Motion constraints for self-driving vehicles during safe stop maneuvers : A proprietary method and a modification of an existing method for finding speed limitations." Thesis, KTH, Skolan för teknikvetenskap (SCI), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-210840.
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At any given moment, self-driving vehicles need to be able to perform a safe stop maneuver in order to come to a complete stop in case of an emergency. It is important to find the maximum allowed entry speed in order to follow the given emergency path and stop in time without losing grip or rolling over. A new method is developed for this purpose and compared to an existing method developed by Joseph Funke and Christian Gerdes.It is found that the new method is more general but does not always converge to a solution for bad guesses and extreme paths. Also, the existing method cannot determine the initial speed for all paths. The increased generality lies in optimizing the emergency path given by a safe zone and considering different friction coefficients in lateral and longitudinal directions. Plots are presented visualizing the maximum speed´s dependence of various parameters for a specific path. The software CarMaker by IPG Automotive is used to validate the results for the developed method. The simulations done show that the method works well for paths in two dimensions but limits the initial speed more than necessary in three dimensions. Both methods find the accelerations needed at every point which may be translated into control signals as an additional use. Methods of knowing the friction coefficients in advance are also discussed.
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Song, Brian Inhyok. "EXPERIMENTAL AND ANALYTICAL ASSESSMENT ON THE PROGRESSIVE COLLAPSE POTENTIAL OF EXISTING BUILDINGS." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1281712538.
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Wiklund, Emma. "Strength of axially loaded screw joints in wooden structures exposed to fire : An overview of existing knowledge and proposal for test method." Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-83830.
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Today, distinct approaches are required when designing timber structures and their joints in the event of fire. Considering that the steel fasteners have temperature dependent properties and that the surrounding wooden construction is also affected by the fire due to occurrence of charring during fire exposure, these types of joints are complicated to design. This study includes an overview of existing knowledge in the subject, where a literature survey has been conducted to enlighten current design procedures, previous research, and available test methods for axially loaded screw joints in wooden structures exposed to fire. The literature survey has been supplemented with an interview survey, in which six respondents’ knowledge in the subject and desires for future studies have played the main role. The results from this study clearly indicates that the existing knowledge regarding axially loaded screw joints in wooden structures exposed to fire is insufficient. Today’s standards for the design of these types of joints are incomplete with respect to the referred joint arrangement and there are no explicit test methods for determination of the strength of these joints under fire exposure. A few previous studies have been carried out and the results from these have proven to be difficult to interpret since the experimental set-up was not consistent between the fire tests. This complicates the process of determining which factor has the greatest impact on the strength of the joint and the main underlying causes generating a collapse of the structure. The interview survey further strengthens the perception, based on the literature survey, that there is a lack of knowledge in the subject. By mapping the existing knowledge in the subject it has been possible to identify deficiencies in current information and, finally, creating and proposing a test method for future tests of axially loaded screw joints in wooden structures exposed to fire. The proposed test method is influenced by existing test methods and design conditions for structures at normal temperatures. The development of this test method has its primary purpose in the ambition that the knowledge of axially loaded screw joints in fire exposed wooden structures can be expanded.
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Elfituri, Abdulbaset Ali. "Role of health education in promoting health in Libya : evaluation of the existing situation and assessment of future needs." Thesis, Brunel University, 2000. http://bura.brunel.ac.uk/handle/2438/5272.
Повний текст джерелаАнотація:
A variety of programmes of health education are designed, addressing promotion of health of the Libyan community. These programmes employ various communication methods and use different education media. This research is the first to evaluate the national programmes of health education in Libya and to determine future needs. It compares health officials' assessments with those of the general public; providers and users. It also examines the health professionals' perceptions on their role in health education. Five questionnaires are used in this research. The first two questionnaires are designed for the evaluation purpose. The third and fourth questionnaires are to determine future needs. The fifth questionnaire is about health professionals' role in health education. Both of the groups, the officials and the general public, assessed TV as being the most effective health education medium. The general public favoured the 'spots' over regular programmes. Their assessment of the radio effectiveness was much lower. Officials, on the other hand, favoured regular programmes over 'spots', and placed radio's role only slightly lower than the impact of TV. Both of the groups recommended wide use of TV for future health education. Children and youth are considered the main groups to be targeted with respect to most of health issues. School is the most preferred setting to target the children. Youth and sport clubs are recommended in communicating with the youth. Assessment of future priority health issues attracted different responses from the two groups. Health professionals perceive that they are responsible for mediating health education and consider this role as important. However, effectiveness of the existing role of health professionals in health education in Libya is evaluated differently. Main barriers to an effective role are identified and required solutions are suggested. The findings of this research suggest the need for systematic consultation across professional and lay groups as a requisite preliminary for statutory health education/promotion initiatives. These findings also address the need for further work and research in certain areas.
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Isliefson, Diana. "Protocols for pre-design assessment of greywater reuse retrofit in urban redevelopment, an opportunity/constraint analysis method for existing buildings." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape15/PQDD_0025/MQ32143.pdf.
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Sheehan, Erin [Verfasser], and Alexander [Akademischer Betreuer] Sauer. "A simulation-based method for improving material efficiency within the constraints of existing production systems / Erin Sheehan ; Betreuer: Alexander Sauer." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2018. http://d-nb.info/1161730052/34.
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Spear, Katherine G. "Selecting and evaluating an existing premarital mentoring curriculum for first time marriages at First United Methodist Church, Lancaster, PA." Online full text .pdf document, available to Fuller patrons only, 2000. http://www.tren.com.
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