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Isacson, Dan. "Application development for smartwatches : An investigation in suitable smartwatch applications." Thesis, KTH, Skolan för datavetenskap och kommunikation (CSC), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-170020.
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The smartwatch has been predicted to be the next big thing in the ecosystem of wearable and mobile devices. The success of the smartphone has a lot to do with the support from third party developers and their applications. This support will most likely be of utmost importance if the smartwatch is going to be successful. But what are suitable applications for this type of device? What are people's expectations and opinions on smartwatches? This thesis work delved into these matters with focus on development for the Apple Watch. This was done through an online survey that reached more than 1400 people, through a field study for one person that used the smartwatch as an air-travel tool and finally through a usability test conducted on five people that tried out several applications, most of which were developed for this project. Four different applications were implemented: a timetable application, a museum audio-guide, a game and an airline application. The results indicate that people generally expected the smartwatch to act as an extension for their smartphones and notifications seemed to be an area in which the smartwatch excelled. The results also show that there are many applicable areas the smartwatch can be used for, but that interaction with these should be kept quick and simple. This is extra important given the limited screen-size and special considerations should be taken on what content to display.Smarta klockor har länge framstått som nästa stora insteg inom ekosystemet av mobila enheter. Succén bakom smarttelefoner har mycket att göra med det stora stödet från tredjepartsutvecklare och deras applikationer. För att smarta klockor ska nå liknande nivåer är det troligt att detta tredjepartsstöd är av stor betydelse. Men vad är lämpliga applikationer för detta format? Vad har folk för förväntningar på denna plattform? Det här arbetet har handlat om dessa ämnen med fokus på utveckling mot Apple Watch. Arbetet har gjorts genom en enkätundersökning online som nått över 1400 användare, genom en fältstudie på en person där en applikation för flygresor testats samt genom ett användartest på fem personer där dessa fått testa på ett antal applikationer för Apple Watch, varav de flesta av dessa var utvecklade för detta projekt. Totalt implementerades fyra applikationer: en tidtabellsapplikation för kommunaltrafik, en ljudguide för ett museum, ett spel och en applikation för flygresande. Resultaten visar att folk verkar förvänta sig att en smart klocka ska fungera som en förlängning av deras smarttelefon och det verkar som att notifikationer är ett väldigt bra användningsområde för formatet. Resultaten visar också att det verkar finnas många olika användningsområden för smarta klockor men att interaktioner med dessa bör vara korta och lätthanterliga. Detta är extra viktigt givet den begränsade skärmstorleken och man bör noga överväga hur och vad man presenterar för användaren.
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Dahlberg, Johan. "Embedded Computer for Space Applications suitable for Linux." Thesis, Linköping University, Department of Electrical Engineering, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2085.
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This report briefly describes the special requirements for a computer board for use in space. In particular, component selection and ways of mitigating the soft and hard errors are discussed. Furthermore, one implementation for a low-cost, relatively high performance computer that will work in the harsh space environment is presented. The report is primarily intended for those familiar with digital design, who need an introduction to construction of space or other high-reliability hardware.
As the quality (resolution) of imagers, spectrometers and other data sources in scientific satellite payloads is increasing, there is also an increasing demand for more processing power in order to compress or in other way process the data before transmitting it on the limited bandwidth microwave downlink to Earth. Scientific instruments are usually mission specific and have rather low budget, so there is a need for a powerful computer board that can be used for a number of missions in order to keep the engineering costs down.
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Stokes, Ben. "Fatigue analysis of austempered ductile iron suitable for automotive camshaft applications." Thesis, University of Southampton, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288156.
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Hallani, Rawad Kamal. "Designing Anthradithiophene Derivatives Suitable For Applications in Organic Electronics and Optoelectronics." UKnowledge, 2015. http://uknowledge.uky.edu/chemistry_etds/61.
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Anthradithiophene (ADT) derivatives have proven to be a front-runner in the world of small molecule semiconductors for organic electronics and optoelectronics. This is mainly due to the improved stability, easy tuning of chemical and physical properties, and impressive device performance that these molecules possess, especially in organic field effect transistors (OFET) and organic photovoltaics (OPV). The second chapter of this dissertation shows that reducing the amount of alkylsilylethynyl groups, used for functionalizing and solubilizing the ADT backbone, does alter the chemical, physical and crystallographic properties of ADTs. These changes offer the opportunity to study and observe different intermolecular interactions as well as monitoring their influence on sulfur scrambling in solid state. Additionally, from the early days ADTs and functionalized ADTs have been synthesized as isomeric mixtures. In chapter three, I demonstrate a new and simple method that can separate the syn and anti isomers of the F-TES-ADT and F-TEG-ADT chromatographically. The effects of isomeric purity on crystal packing and field effect transistor performance were studied extensively.
Chapter four of this dissertation reveals a new generation of acceptor (electron poor) ADT derivatives obtained by attaching cyanide as electron withdrawing group (EWG) to the ADT chromophore. An extensive study was conducted on CN-ADT (acceptor) molecules in small molecule (F-TES-ADT) donor/ small molecule (CN-ADT) acceptor binary BHJ blends as well as P3HT/CN-ADT/PCBM ternary BHJ blends. Photophysical studies of the Donor/ acceptor blends (interface, domains, and crystal orientation) were conducted to obtain a better understanding of the film morphology and its effect on solar cell performance.
Finally, the last part of the dissertation, Chapter five, focus on studying singlet fission in ADT derivatives, as well as the effect of varying the size of the alkylsilylethynyl functional group (used for solubilizing the ADT backbone) on altering the electronic couplings and how can that potentially affect the singlet fission rate in these molecules. We also tried to inspect the extent of the correlation between long-range order in crystal packing and singlet fission by monitoring singlet fission rate and efficiency for ADT derivatives with different thin film morphologies.
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Massera, Jonathan. "Nucleation and growth behavior of tellurite-based glasses suitable for mid-infrared applications." Connect to this title online, 2009. http://etd.lib.clemson.edu/documents/1263397286/.
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Chai, Chengran. "Determining suitable monetization approaches for mobile phone applications within the smart phones industry." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/80991.
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Thesis (M.B.A.)--Massachusetts Institute of Technology, Sloan School of Management; and, (S.M.)--Massachusetts Institute of Technology, Engineering Systems Division; in conjunction with the Leaders for Global Operations Program at MIT, 2013.Cataloged from PDF version of thesis.
Includes bibliographical references (p. 44-46).
Smart Phone Ecosystems revolve around developers, applications and users. One of Nokia's own platforms, the S40, targets the low end of the smart phone market. Nokia's Content & Ecosystem Sourcing group is constantly looking for ways to help its developers of the S40 platform create more successful applications. This paper attempts to do so by examining the different monetization approaches for different application categories across all regions. While paid applications still constitute a majority of the revenue generating applications, the S40 marketplace has experienced a significant increase in the number of Try & Buy and In-App-Purchase applications in recent years. Try & Buy has been proven to be a dominant force in gaming categories, albeit with some differences across the regions. In-App- Purchase has also shown promise within games and some other categories, but the acceptance of this monetization approach varies greatly by region. Two new metrics, Revenue per Product View and Downloads per Product View, are proposed to evaluate application performance independent of download volume and monetization approach. Utilizing these new metrics, we found the applications utilize the Try & Buy approach to perform equally as well, if not better than, the applications utilizing the paid approach. The new metrics will enable the group to track the performance of applications from a holistic perspective and more easily identify those developers who have created successful applications. Additionally, the Downloads per Product View metric enables tracking of the reach of the applications, an indicator of the health of the overall ecosystem. The specific knowledge will enable Nokia's Content & Ecosystem Sourcing group to provide more input to developers on monetization approaches during the early stages of development, thereby increasing their chances of launching successful applications, ultimately helping the entire S40 ecosystem.
by Chengran Chai.
S.M.
M.B.A.
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Ullah, Sana. "A magnet assisted segmental rotor switched reluctance machine suitable for fault tolerant aerospace applications." Thesis, University of Newcastle upon Tyne, 2016. http://hdl.handle.net/10443/3368.
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The aerospace industry is moving towards more-electric aircraft. These electrical systems are lighter, more efficient and smaller compared to present hydraulic system. The permanent magnet electrical machine is an obvious choice to replace these hydraulic systems because of its high torque density. However for low speed applications, there are significant drag torque issues which negate some of the machine’s advantages. This thesis introduces a new permanent magnet assisted segmental rotor switched reluctance machine. This machine was first designed by using finite element software and then compared with a conventional segmental rotor switched reluctance machine, showing an increase in torque by increasing non saturation region of the stator lamination. On this basis, a fault-tolerant permanent magnet assisted segmental rotor switched reluctance machine was designed to replace the permanent magnet machine used in the nose wheel of the aeroplane. Both two-dimensional and three-dimensional finite element analyses were conducted to analyse the dominant end winding effect. Fault-tolerant segmental rotor switched reluctance machine was then built and tested. Static analysis was conducted to determine current-flux linkage and torque values at different rotor angles. The machine was analysed both with and without magnets to assess the effect of reverse magnetization with magnets at the stator tooth tip. Mutual inductance was also found using the same test rig. Dynamic testing of the machine was done to determine open circuit voltage and short-circuit current. A novel pot core permanent magnet assisted inductor was also designed and compared with the conventional E-E core inductor. The magnet was used to hold the inductance of the inductor constant for high current values and the inductor was then tested to determine magnet’s effect. A dominant inner loop effect was found which was proved by doing several tests. Various recommendations were made to further improve overall performance of the machine and the inductor.
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Pittarello, Ledo. "The preparation and characterisation of cells and their scaffolds suitable for tissue repair applications." Thesis, University College London (University of London), 2008. http://discovery.ucl.ac.uk/1445238/.
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In this research, a tissue engineering approach was investigated for the fabrication of homogeneous polymer/cells scaffolds suitable for applications in the clinic, in particular for the treatment of coronary disease and atherosclerosis. Sodium alginate chemically modified with an RGD-containing peptide promoting cell attachment was chosen as the natural polymer for the preparation of matrix/cells constructs. Several conditions were investigated to optimise the derivatisation of the biomaterial, and no major dissimilarities were identified among alginates with different guluronic/mannuronic acid compositions and viscosities during the derivatisation process. Successful incorporation of the GRGDY-pentapeptide onto the alginate was achieved. Amino acid analysis, which allowed a reliable quantification of the degree of peptide attached, demonstrated that the complete pentapeptidic sequence was present in the alginate after completion of the derivatisation procedure. However, a significant loss of the peptide's final tyrosine residue was consistently observed during derivatisation. Studies were also performed using multipotent fibroblast-like plastic-adherent cells recovered from frozen bone marrow samples of adult patients, here defined as human "mesenchymal stem cells" (hMSCs). Prior to the cell immobilisation in the alginate matrix, the optimal conditions for cell expansion in monolayer culture were identified. Cell samples were assessed according to their percent viability at each expansion passage, doubling time, cell growth rate and specific glucose consumption rate. Overall, the highest cell growth kinetics, highest cell viabilities and lowest doubling times were observed for the combined use of serum-/bFGF-supplemented low-glucose DMEM medium and non-coated culture vessels in a 21% dissolved oxygen tension atmosphere. hMSCs expanded for four subsequent passages under these monolayer conditions proved to retain their undifferentiated state and their ability to differentiate toward multiple phenotypes. Finally, alginate/cells beads were prepared and maintained in the optimal culture conditions identified in the monolayer studies. Constructs prepared with either hMSCs or human foreskin fibroblasts in either unmodified alginate or alginate coupled with the GRGDY-pentapeptide were analysed. After immobilisation, both cell types failed to adhere to the matrix and to acquire their characteristic elongated, spindle-shaped morphology. Lack of cell proliferation and.
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Schutte, Sebastian. "Crystal ball or screen saver? discussing suitable applications for agent based modeling in the humanities /." [S.l. : s.n.], 2008. http://nbn-resolving.de/urn:nbn:de:bsz:25-opus-60015.
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Mercer, Christopher Crossley. "The search for an ionospheric model suitable for real-time applications in HF radio communications." Thesis, Rhodes University, 1994. http://hdl.handle.net/10962/d1005274.
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Statement of work: In essence the research work was to focus on the development of an ionospheric model suitable for real time HF frequency prediction and direction finding applications. The modelling of the ionosphere had to be generic in nature, sufficient to ensure that the CSIR could simultaneously secure commercial competitiveness in each of the three niche market areas aforementioned, while requiring only minimal changes to software architecture in the case of each application. A little research quickly showed that the development of an ionospheric model capable of driving a HFDFSSL system in "real time" would result in one having to make only slight re-structuring of the software to facilitate application of the same model in the areas of real time frequency prediction and spectrum management. The decision made at the outset of the project to slant the research toward the development of a model best suited for HF direction finding applications is reflected in the avenues followed during the course of the modelling process
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Ånmark, Niclas. "Inclusion Characteristics and Their Link to Tool wear in Metal Cutting of Clean Steels Suitable for Automotive Applications." Licentiate thesis, KTH, Tillämpad processmetallurgi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-164875.
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This thesis covers some aspects of hard part turning of carburised steels using a poly‑crystalline cubic boron nitride (PCBN) cutting tool during fine machining. The emphasis is on the influence of the steel cleanliness and the characteristics of non‑metallic inclusions in the workpiece on the active wear mechanisms of the cutting tool. Four carburising steel grades suitable for automotive applications were included, including one that was Ca‑treated. A superior tool life was obtained when turning the Ca-treated steel. The superior machinability is associated with the deposition of lubricating (Mn,Ca)S and (CaO)x-Al2O3-S slag layers, which are formed on the rake face of the cutting tool during machining. Moreover, the transfer of work material to the rake face crater is characteristic in hard part turning of clean steels. It can be because of the lack of sulfides that protect the cutting edge when turning machinability treated steels. This corresponds to the more pronounced crater wear caused by the low‑sulfur steels than that of the steels with higher sulfur contents. It was also concluded that the composition of the non‑metallic inclusions in the Ca‑treated steel is a more important factor than the inclusion number and size, in hard part turning using a PCBN cutting tool. Also, a 3D analysis after electrolytic extraction was found to give a more precise characterisation of non‑metallic inclusions than the conventional 2D analysis by SEM‑EDS. In turn, better correlations to machinability and mechanical properties can be obtained. Hence, the use of this technique is beneficial for future material development. Finally, the challenge for future metallurgy is to manufacture high‑performance steels with improved combined properties of mechanical strength and machinability.QC 20150422
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Godshall, David Leonard. "Production And Structure/Properties Of Nylon-6 Core / Isotactic Polypropylene Sheath Bicomponent Fibers Suitable For Use In Carpeting Applications." Thesis, Virginia Tech, 1999. http://hdl.handle.net/10919/32936.
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Bicomponent fibers consisting of nylon-6 and
isotactic polypropylene were produced. In-situ,
reactive compatibilization was achieved using a
maleic anhydride functionalized polypropylene
between the materials at the interface. The
overall goal of the research was to produce a
bicomponent fiber of these materials that would
be suitable for use in commercial carpet
applications. Carpet samples produced using
nylon-6 core / polypropylene sheath bicomponent
fibers displayed stain resistance comparable to
a wholly polypropylene carpet. The wear
characteristics of these fibers were found to be
strongly dependent upon the maleic anhydride
content and the molecular weight of the maleic
anhydride functionalized polypropylene. Adhesion
between the nylon-6 and polypropylene phases, and
the mechanical properties of the polypropylene
phase were affected by the addition of the
functionalized polypropylene. Additional
information regarding the processing conditions
necessary to produce fibers of the desired
cross-section from these materials was obtained
using capillary rheometry. A number of
analytical techniques including DSC, TGA, and
SEM were used to better understand the structure
of the maleated materials.Master of Science
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Öhrström, Tobias, and Christoffer Olsson. "The precision of RSSI-fingerprinting based on connected Wi-Fi devices." Thesis, Högskolan i Borås, Akademin för bibliotek, information, pedagogik och IT, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-12161.
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Received Signal Strength Indication (RSSI) fingerprinting is a popular technique in the fieldof indoor positioning. Many studies on the subject exist acknowledging Wi-Fi signal variationconnected to Wi-Fi signals, but does not discuss possible signal variation created byconnected devices nor consequential precision loss.Understanding more about the origins of signal variation in received signal strength indication(RSSI) fingerprinting would help deal with or prevent them as well as provide moreknowledge for applications based on such signals. Environments with a varying number ofconnected devices would benefit from knowing changes in localization precision resultingfrom the devices connecting and disconnecting from the access point because it wouldindicate whether workarounds for such circumstances would be necessary.To address this issue, the work presented here focuses on how the precision of RSSIfingerprinting vary given different levels of connected Wi-Fi devices. It was carried out byconducting real world experiments at times of low- and normal levels of connected devices toaccess points on two separate locations and evaluating precision changes between statedactivity levels. These experiments took place at the University of Borås as well as at Ericssonin Borås.Experimental findings indicate that the accuracy does deteriorate in higher levels of activitythan in low activity, even though not enough evidence to determine the precision ofdeterioration. The experiments thereby provide a foundation for location-based applicationsand services that can communicate the level of positional error that exist in differentenvironments which would make the users aware but also make the applications adaptaccordingly to different environments. Based on the precision achieved, we identify variousapplications that would benefit from our proposed model. These were applications that wouldtrack mobile resources, find immobile resources, find the movement flows of users as well asnavigation- and Wi-Fi coverage applications.Further research for investigating the exact correlation between access point stress andprecision loss is proposed to fully understand the implications connected devices have onRSSI fingerprinting.
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Canciger, Izzet. "System Information Model suitable for Application Management Organization." Thesis, Högskolan i Gävle, Avdelningen för Industriell utveckling, IT och Samhällsbyggnad, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-15213.
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The Delivery Organization Windows Development at Sandvik IT GSS is today responsible for managing over 100 different systems internally and globally, some acquired but most proprietary. The systems have Life Cycle and dependencies of other applications, techniques etc. and Service Level Agreement (SLA) with customers. The details for these systems are now scattered in a variety of locations such as web pages, spreadsheets, word documents, Notes databases and by knowledge of the employees. Today they are unable to get a clear view of the systems; the applications and techniques depend, how long life cycle each have etc. The project consist of creating a database model by gathering information needed, analyze it and develop an information model and if time allows develop a simple application to visualize the concept. With this work, the information will be gathered in one place and the employees will easier get a clear view of the systems and their dependencies, offer a higher level of service and will be more effective in their work. Keywords: System Information Model, Systems Design, Information Model, Database Model, Business Analysis, Application Management.
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Anton, Mösenbacher. "Develop Mobile Hybrid Application with Ionic and Angular.js : Suitable for further development?" Thesis, Linnéuniversitetet, Institutionen för datavetenskap (DV), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-56839.
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This report presents a proof-of-concept regarding hybrid mobile application development and mobile phones. Regarding the background of a desire to simplify and modernize of how hot work is carried out in in industry. A conclusion on future developments regarding a hybrid or native options will also be deducted. Keywords: native, hybrid, mobile application, future development, Agile, Scrum.
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Huerta, Sanchez Diana Lorena. "Identifying beef muscles and processing treatments suitable for use in fajita application." [College Station, Tex. : Texas A&M University, 2006. http://hdl.handle.net/1969.1/ETD-TAMU-1721.
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Al, Akhras Hassan. "Automatic isogeometric analysis suitable trivariate models generation : Application to reduced order modeling." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEI047/document.
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Cette thèse présente un algorithme automatique pour la construction d’un modèle NURBS volumique à partir d’un modèle représenté par ses bords (maillages ou splines). Ce type de modèle est indispensable dans le cadre de l’analyse isogéométrique utilisant les NURBS comme fonctions de forme. Le point d’entrée de l’algorithme est une triangulation du bord du modèle. Après deux étapes de décomposition, le modèle est approché par un polycube. Ensuite un paramétrage surfacique entre le bord du modèle et celui du polycube est établi en calculant un paramétrage global aligné à un champ de direction interpolant les directions de courbure principales du modèle. Finalement, le paramétrage volumique est obtenu en se basant sur ce paramétrage surfacique. Dans le contexte des études paramétriques basées sur des paramètres de formes géométriques, cette méthode peut être appliquée aux techniques de réduction de modèles pour obtenir la même représentation pour des objets ayant différentes géométries mais la même topologieThis thesis presents an effective method to automatically construct trivariate tensor-product spline models of complicated geometry and arbitrary topology. Our method takes as input a solid model defined by its triangulated boundary. Using cuboid decomposition, an initial polycube approximating the input boundary mesh is built. This polycube serves as the parametric domain of the tensor-product spline representation required for isogeometric analysis. The polycube's nodes and arcs decompose the input model locally into quadrangular patches, and globally into hexahedral domains. Using aligned global parameterization, the nodes are re-positioned and the arcs are re-routed across the surface in a way to achieve low overall patch distortion, and alignment to principal curvature directions and sharp features. The optimization process is based on one of the main contributions of this thesis: a novel way to design cross fields with topological (i.e., imposed singularities) and geometrical (i.e., imposed directions) constraints by solving only sparse linear systems. Based on the optimized polycube and parameterization, compatible B-spline boundary surfaces are reconstructed. Finally, the interior volumetric parameterization is computed using Coon's interpolation and the B-spline surfaces as boundary conditions. This method can be applied to reduced order modeling for parametric studies based on geometrical parameters. For models with the same topology but different geometries, this method allows to have the same representation: i.e., meshes (or parameterizations) with the same topology
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Warman, Benjamin R. "A Suitable Software Architecture for Video Discussion Boards as Applied to the OLE Board." Miami University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=miami1346189042.
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Williamson, J. "Development and application of in vitro micronucleus test : the quest for a suitable cell type." Thesis, Swansea University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.636657.
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To prevent unnecessary human exposure to aneugens, regulatory agencies are beginning to suggest screening for induced aneuploidy be undertaken. There are two mechanisms by which aneuploidy may arise, non-disjunction and chromosome loss. To fully assess the aneugenic potential of a compound a test that can detect both should be employed. At present, the cytokinesis-blocked micronucleus assay is the only assay that can, when coupled with the appropriate molecular probing technologies, detect both mechanisms. The use of the in vitro micronucleus assay to detect aneuploidy is a relatively recent advance and as such regulatory bodies are yet to include the test in the recommended guidelines for testing. In consequence, in recent years great efforts to validate the assay have been made and the work presented here was performed to this end. In this study, the in vitro micronucleus assay in conjunction with fluorescence labelling techniques, was assessed to determine the assay's ability to detect induced aneuploidy. An important part of this investigation focused upon the cell type to be used. Ideally, to detect non-disjunction a karyotypically stable cell type should be employed. A such, the primary humans cell types, whole blood lymphocytes, extended-term (ET) lymphocytes, isolated lymphocytes and fibroblasts were investigated. In principle, the ET lymphocytes, represented the most suitable cell type. However, the ET system for testing aneugens revealed unexpected problems that required a series of further investigations which illustrated the significance of pH in cell culture division fidelity. Finally, studies were also undertaken to determine the role of metabolism in aneugen activity.
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Mwaniki, Fredrick Mukundi. "High voltage boost DC-Dc converter suitable for variable voltage sources and high power photovoltaic application." Diss., University of Pretoria, 2013. http://hdl.handle.net/2263/37320.
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Important considerations of a photovoltaic (PV) source are achieving a high voltage and drawing currents with very little ripple component from it. Furthermore, the output from such a source is variable depending on irradiation and temperature. In this research, literature review of prior methods employed to boost the output voltage of a PV source is examined and their limitations identified. This research then proposes a multi-phase tapped-coupled inductor boost DC-DC converter that can achieve high voltage boost ratios, without adversely compromising performance, to be used as an interface to a PV source. The proposed converter achieves minimal current and voltage ripple both at the input and output. The suitability of the proposed converter topology for variable input voltage and variable power operation is demonstrated in this dissertation. The proposed converter is also shown to have good performance at high power levels, making it very suitable for high power applications.
Detailed analysis of the proposed converter is done. Advantages of the proposed converter are explained analytically and confirmed through simulations and experimentally. Regulation of the converter output voltage is also explained and implemented using a digital controller. The simulation and experimental results confirm that the proposed converter is suitable for high power as well as variable power, variable voltage applications where high voltage boost ratios are required.Dissertation (MEng)--University of Pretoria, 2013.
gm2014
Electrical, Electronic and Computer Engineering
Unrestricted
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Lamprou, Efthymios. "Development and Performance Evaluation of High Resolution TOF-PET Detectors Suitable for Novel PET Scanners." Doctoral thesis, Universitat Politècnica de València, 2021. http://hdl.handle.net/10251/162991.
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[ES] La Tomografía por Emisión de Positrones (PET) es una de las técnicas más importantes en la medicina de diagnóstico actual y la más representativa en el campo de la Imagen Molecular. Esta modalidad de imagen es capaz de producir información funcional única, que permite la visualización en detalle, cuantificación y conocimiento de una variedad de enfermedades y patologías. Áreas como la oncología, neurología o la cardiología, entre otras, se han beneficiado en gran medida de esta técnica. A pesar de que un elevado número de avances han ocurrido durante el desarrollo del PET, existen otros que son de gran interés para futuras investigaciones. Uno de los principales pilares actualmente en PET, tanto en investigación como en desarrollo, es la obtención de la información del tiempo de vuelo (TOF) de los rayos gamma detectados. Cuando esto ocurre, aumenta la sensibilidad efectiva del PET, mejorando la calidad señal-ruido de las imágenes. Sin embargo, la obtención precisa de la marca temporal de los rayos gamma es un reto que requiere, además de técnicas y métodos específicos, compromisos entre coste y rendimiento. Una de las características que siempre se ve afectada es la resolución espacial. Como discutiremos, la resolución espacial está directamente relacionada con el tipo de centellador y, por lo tanto, con el coste del sistema y su complejidad.
En esta tesis, motivada por los conocidos beneficios en imagen clínica de una medida precisa del tiempo y de la posición de los rayos gamma, proponemos configuraciones de detectores TOF- PET novedosos capaces de proveer de ambas características. Sugerimos el uso de lo que se conoce como métodos de "light-sharing", tanto basado en cristales monolíticos como pixelados de tamaño diferente al del fotosensor. Estas propuestas hacen que la resolución espacial sea muy alta. Sin embargo, sus capacidades temporales han sido muy poco abordadas hasta ahora. En esta tesis, a través de varios artículos revisados, pretendemos mostrar los retos encontrados en esta dirección, proponer determinadas configuraciones y, además, indagar en los límites temporales de éstas.
Hemos puesto un gran énfasis en estudiar y analizar las distribuciones de la luz centellante, así como su impacto en la determinación temporal. Hasta nuestro conocimiento, este es el primer trabajo en el que se estudia la relación de la determinación temporal y la distribución de luz de centelleo, en particular usando SiPM analógicos y ASICs. Esperamos que esta tesis motive y permita otros muchos trabajos orientados en nuevos diseños, útiles para instrumentación PET, así como referencia para otros trabajos.
Esta tesis esta organizada como se describe a continuación. Hay una introducción compuesta por tres capítulos donde se resumen los conocimientos sobre imagen PET, y especialmente aquellos relacionados con la técnica TOF-PET. Algunos trabajos recientes, pero aún no publicados se muestran también, con el objetivo de corroborar ciertas ideas. En la segunda parte se incluyen las cuatro contribuciones que el candidato sugiere para el compendio de artículos.[CA] La Tomografia per Emissió de Positrons (PET) és una de les tècniques més importants en la medicina de diagnòstic actual i la més representativa en el camp de la Imatge Molecular. Esta modalitat d'imatge és capaç de produir informació funcional única, que permet la visualització en detall, quantificació i coneixement d'una varietat de malalties i patologies. Àrees com l'oncologia, neurologia o la cardiologia, entre altres, s'han beneficiat en gran manera d'aquesta tècnica. Tot i que un elevat nombre d'avanços han ocorregut durant el desenvolupament del PET, hi ha altres que són de gran interés per a futures investigacions. Un dels principals pilars actuals en PET, tant en investigació com en desenvolupament, és l'obtenció de la informació del temps de vol (TOF en anglès) dels raigs gamma detectats. Quan açò ocorre, augmenta la sensibilitat efectiva del PET, millorant la qualitat senyal-soroll de les imatges. No obstant això, l'obtenció precisa de la marca temporal dels raigs gamma és un repte que requerix, a més de tècniques i mètodes específics, compromisos entre cost i rendiment. Una de les característiques que sempre es veu afectada és la resolució espacial. Com discutirem, la resolució espacial està directament relacionada amb el tipus de centellador, i per tant, amb el cost del sistema i la seua complexitat. En aquesta tesi, motivada pels coneguts beneficis en imatge clínica d'una mesura precisa del temps i de la posició dels raigs gamma, proposem nouves configuracions de detectors TOF-PET capaços de proveir d'ambduess característiques. Suggerim l'ús del que es coneix com a mètodes de "light-sharing", tant basat en cristalls monolítics com pixelats de diferent tamany del fotosensor. Aquestes propostes fan que la resolució espacial siga molt alta. No obstant això, les seues capacitats temporals han sigut molt poc abordades fins ara. En aquesta tesi, a través de diversos articles revisats, pretenem mostrar els reptes trobats en aquesta direcció, proposar determinades configuracions i, a més, indagar en els límits temporals d'aquestes. Hem posat un gran èmfasi a estudiar i analitzar les distribucions de la llum centellejant, així com el seu impacte en la determinació temporal. Fins al nostre coneixement, aquest és el primer treball en què s'estudia la relació de la determinació temporal i la distribució de llum de centelleig, en particular utilitzant SiPM analògics i ASICs. Esperem que aquesta tesi motive i permeta molts altres treballs orientats en nous dissenys, útils per a instrumentació PET, així com referència per a altres treballs. Aquesta tesi esta organitzada com es descriu a continuació. Hi ha una introducció composta per tres capítols on es resumeixen els coneixements sobre imatge PET i, especialmente, aquells relacionats amb la tècnica TOF-PET. Alguns treballs recents, però encara no publicats es mostren també, amb l'objectiu de corroborar certes idees. La segona part de la tesi conté els quatre articles revisats que el candidat suggereix.
[EN] Positron Emission Tomography (PET) is one of the greatest tools of modern diagnostic medicine and the most representative in the field of molecular imaging. This imaging modality, is capable of providing a unique type of functional information which permits a deep visualization, quantification and understanding of a variety of diseases and pathologies. Areas like oncology, neurology, or cardiology, among others, have been well benefited by this technique. Although numerous important advances have already been achieved in PET, some other individual aspects still seem to have a great potential for further investigation. One of the main trends in modern PET research and development, is based in the extrapolation of the Time- Of-Flight (TOF) information from the gamma-ray detectors. In such case, an increase in the effective sensitivity of PET is accomplished, resulting in an improved image signal-to-noise ratio. However, the direction towards a precise decoding of the photons time arrival is a challenging task that requires, besides specific approaches and techniques, tradeoffs between cost and performance. A performance characteristic very habitually compromised in TOF-PET detector configurations is the spatial resolution. As it will be discussed, this feature is directly related to the scintillation materials and types, and consequently, with system cost and complexity. In this thesis, motivated by the well-known benefits in clinical imaging of a precise time and spatial resolution, we propose novel TOF-PET detector configurations capable of inferring both characteristics. Our suggestions are based in light sharing approaches, either using monolithic detectors or crystal arrays with different pixel-to-photosensor sizes. These approaches, make it possible to reach a precise impact position determination. However, their TOF capabilities have not yet been explored in depth. In the present thesis, through a series of peer-reviewed publications we attempt to demonstrate the challenges encountered in these kinds of configurations, propose specific approaches improving their performance and eventually reveal their limits in terms of timing. High emphasis is given in analyzing and studying the scintillation light distributions and their impact to the timing determination. To the best of our knowledge, this is one of the first works in which such detailed study of the relation between light distribution and timing capabilities is carried out, especially when using analog SiPMs and ASICs. Hopefully, this thesis will motivate and enable many other novel design concepts, useful in PET instrumentation as well as it will serve as a helpful reference for similar attempts. The present PhD thesis is organized as follows. There is an introduction part composed by three detailed sections. We attempt to summarize here some of the knowledge related to PET imaging and especially with the technique of TOF-PET. Some very recent but still unpublished results are also presented and included in this part, aiming to support statements and theories. The second part of this thesis lists the four peer-reviewed papers that the candidate is including.
This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (grant agreement No 695536). It has also been supported by the Spanish Ministerio de Economía, Industria y Competitividad under Grants No. FIS2014-62341-EXP and TEC2016-79884-C2-1-R. Efthymios Lamprou has also been supported by Generalitat Valenciana under grant agreement GRISOLIAP-2018-026.
Lamprou, E. (2021). Development and Performance Evaluation of High Resolution TOF-PET Detectors Suitable for Novel PET Scanners [Tesis doctoral]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/162991
TESIS
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Farr, Xandri C. "Development of a fault-tolerant bus system suitable for a high-performance, embedded, real-time application on SUNSAT's ADCS." Thesis, Stellenbosch : Stellenbosch University, 2000. http://hdl.handle.net/10019.1/51686.
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Thesis (MEng)--University of Stellenbosch, 2000.ENGLISH ABSTRACT: The Attitude Determination and Control System (ADCS) of the Stellenbosch University Satellite (SUNSAT I) is an integrated system providing some redundancy and the necessary data management to control the spacecraft. However, the redundancy is not easily accessible and there is a lack in flexibility when testing individual modules during integration or when the system needs to be extended. The objective of this thesis was thus to develop a high reliability, flexible, modular communication system that included some type of redundancy to manage real-time data and to prevent severe malfunctioning of the entire system. The first step in the project's development methodology was to summarise the requirements and specifications by studying the current ADCS architecture and data management. An investigation into the Controller Area Network (CAN) protocol showed that this technology would fit the requirements very well, leading to the design and implementation of several concept topologies based on CAN. Thereafter, a demonstration model consisting of three prototype nodes was composed. The performance of the so called dual CAN node was analysed and an extrapolation was 'made to determine whether the architecture could support the complete ADCS. It was demonstrated that the dual CAN node provides enough room to accommodate all the processors, actuators and sensors of the ADCS. At the same time, it was shown that reliability and robustness was increased by enhanced redundancy at a node-level as well as at the greater system-level. A dual CAN bus was provided for redundancy at a node-level. At the system-level, the command and data-gathering modules (ACP or OBC's) can now effectively be multiplexed on the network of actuators and sensors. Furthermore, it was shown that error detection capabilities and diagnostics can be enhanced and the complexity of the communication architecture and related wiring harnesses can be reduced. This allows easier access to modules and simplifies development.
AFRIKAANSE OPSOMMING: Die Attitude Determination and Control System (ADCS) van Stellenbosch University Satellite (SUNSAT I) is 'n geïntegreerde stelsel wat voorsiening maak vir 'n mate van oortolligheid en 'n vermoeë om stelseldata te bestuur vir goeie satellietbeheer. Nietemin, hierdie oortolligheid is nie baie toeganklik nie en daar is 'n gebrek aan aanpasbaarheid tydens die toets en integrasie van individuele modules of moontlike stelseluitbreidings. Die doelwit van hierdie tesis was dus die ontwikkeling van 'n betroubare, aanpasbare, modulêre kommunikasie stelsel wat 'n tipe oortolligheid insluit sodat intydse data bestuur kan word en algehele stelselondergang vermy kan word. Die eerste stap in die projek se ontwikkelings metodiek was om 'n opsomming te verkry van die vereistes en spesifikasies deur die huidige ADCS se argitektuur en databestuur te ondersoek. 'n Ondersoek na die Controller Area Network (CAN) protokol het getoon dat hierdie tegnologie aan baie van die vereistes voldoen. Dit het aanleiding gegee tot die ontwerp en implementering van 'n paar konsep ontwerpe gebaseer op CAN. Daarna is 'n demonstrasie model bestaande uit drie prototipe nodusse gebou. Die werksverrigting van die sogenoemde dual CAN node, is ondersoek en 'n ekstrapolasie was gemaak om vas te stelof die argitektuur die volkome ADCS kan huisves. Deur demonstrasie was daar getoon dat die dual CAN node wel genoeg ruimte verskaf om al die verwerkers, aktueerders en sensors van die ADCS te akkommodeer. Daar was terselfdertyd getoon dat betroubaarheid en robuustheid verhoog is deur die verbeterde oortolligheid op 'n node-vlak sowel as op die groter stelsel-vlak. 'n Dubbele CAN bus is gebruik vir oortolligheid op 'n node-vlak. Op 'n stelsel-vlak kan die bevel-en-dataversamelings modules (ACP en aBC's) effektief gemultipleks word op die netwerk van aktueerders en sensors. Daar was verder getoon dat die foutopspoorings vermoeë en diagnostiese vermoeë verbeter kan word en die kompleksiteit van die kommunikasie argitektuur en ooreenkomstige kabelharnasse vereenvoudig kan word. Die gevolg is vereenvoudigde toegang tot modules en vergemaklikde opgradering.
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Dion-Dallaire, Andrée-Anne. "A Framework for Mesh Refinement Suitable for Finite-Volume and Discontinuous-Galerkin Schemes with Application to Multiphase Flow Prediction." Thesis, Université d'Ottawa / University of Ottawa, 2021. http://hdl.handle.net/10393/42204.
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Modelling multiphase flow, more specifically particle-laden flow, poses multiple challenges. These difficulties are heightened when the particles are differentiated by a set of “internal” variables, such as size or temperature. Traditional treatments of such flows can be classified in two main categories, Lagrangian and Eulerian methods. The former approaches are highly accurate but can also lead to extremely expensive computations and challenges to load balancing on parallel machines. In contrast, the Eulerian models offer the promise of less expensive computations but often introduce modelling artifacts and can become more complicated and expensive when a large number of internal variables are treated. Recently, a new model was proposed to treat such situations. It extends the ten-moment Gaussian model for viscous gases to the treatment of a dilute particle phase with an arbitrary number of internal variables. In its initial application, the only internal variable chosen for the particle phase was the particle diameter. This new polydisperse Gaussian model (PGM) comprises 15 equations, has an eigensystem that can be expressed in closed form and also possesses a convex entropy. Previously, this model has been tested in one dimension. The PGM was developed with the detonation of radiological dispersal devices (RDD) as an immediate application. The detonation of RDDs poses many numerical challenges, namely the wide range of spatial and temporal scales as well as the high computational costs to accurately resolve solutions. In order to address these issues, the goal of this current project is to develop a block-based adaptive mesh refinement (AMR) implementation that can be used in conjunction with a parallel computer. Another goal of this project is to obtain the first three-dimensional results for the PGM. In this thesis, the kinetic theory of gases underlying the development of the PGM is studied. Different numerical schemes and adaptive mesh refinement methods are described. The new block-based adaptive mesh refinement algorithm is presented. Finally, results for different flow problems using the new AMR algorithm are shown, as well as the first three-dimensional results for the PGM.
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Garza-Garcia, Alicia Acely. "Production of disulphide-bonded domains suitable for NMR structure determination : application to the SRCR domains of the lymphocyte receptor CD5." Thesis, University College London (University of London), 2005. http://discovery.ucl.ac.uk/1444414/.
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This work describes the development of a systematic methodology to overcome two of the difficulties commonly encountered when expressing eukaryotic domains in bacterial hosts, namely the failure to obtain folded protein in vivo and the low solubility of the expression product. This methodology made possible the production of samples of the first scavenger receptor cysteine rich (SRCR) domain of human CD5, /zCD5dl, with properties suitable for multidimensional NMR studies. The SRCR domains of /zCD5 express in bacteria as insoluble aggregates. The aggregates were purified in order to perform the folding in vitro. Optimal conditions for folding were found using a novel systematic screen based on a fractional factorial design. In vitro folding yields were assessed using RP-HPLC and non-denaturing PAGE. The attainment of /zCD5dl protein samples of sufficiently high concentration to perform multidimensional NMR was achieved by performing rational apolar-to-polar mutations selected by analysis of a multiple sequence alignment. Eight single residue mutants were engineered and expressed. Four of them had better in vitro folding yields than the wild type and a double mutant was constructed by combination of the best behaved single mutations. This double mutant was used to determine the structure of the domain. NMR experiments at 298 K showed that some regions of /zCD5dl undergo conformational exchange on a microsecond to millisecond timescale, hampering the assignment of the resonance signals. Increasing the temperature to 318 K was found to greatly enhance the quality of the NMR spectra and enabled the assignment of more than 95% of the resonances. The solution structure of /*CD5dl was determined using standard interproton distance and dihedral angle-restrained molecular dynamics protocols. Forty percent of the residues were found to be in structurally well-defined regions, including all of the regular secondary structure features found for other members of SRCR superfamily. The remaining residues of the polypeptide appear to be distinctly less well ordered.
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Bonilla, Valverde José Pablo, Clemens Blank, Mario Roidt, Lisa Schneider, and Stefan Catalin. "Application of a GIS Multi-Criteria Decision Analysis for the Identification of Intrinsic Suitable Sites in Costa Rica for the Application of Managed Aquifer Recharge (MAR) through Spreading Methods." Molecular Diversity Preservation International (MDPI), 2016. https://tud.qucosa.de/id/qucosa%3A30199.
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Costa Rica’s annual mean precipitation is above 3300 mm, but this precipitation is not evenly distributed in time or space, producing clear differentiated wet and dry seasons in most of the country. Droughts are also common phenomena which greatly affect the availability of water resources. Managed aquifer recharge (MAR) schemes are being taken into consideration to enhance the underground water storage capacity of the country. The present study constitutes the first assessment for the identification of suitable sites for the implementation of MAR technology spreading methods (SM) in Costa Rica. The suitable sites are identified by means of a geographic information system multi-criteria decision analysis (GIS-MCDA) based on four criteria: hydrogeological aptitude, terrain slope, top soil texture and drainage network density. Four steps are performed in order to identify these sites: problem definition, screening for suitable areas, suitability mapping, and sensitivity analysis. The suitability map was divided in two zones after the screening: suitable and unsuitable, the first zone was further divided in five classes according to the weighted linear combination (WLC) ranking. The results indicate that 61% of the country is suitable for conducting SM. This map is a tool for future implementation of MAR techniques in the country.
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Bonilla, Valverde José Pablo, Clemens Blank, Mario Roidt, Lisa Schneider, and Stefan Catalin. "Application of a GIS Multi-Criteria Decision Analysis for the Identification of Intrinsic Suitable Sites in Costa Rica for the Application of Managed Aquifer Recharge (MAR) through Spreading Methods." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-220396.
Full textAbstract:
Costa Rica’s annual mean precipitation is above 3300 mm, but this precipitation is not evenly distributed in time or space, producing clear differentiated wet and dry seasons in most of the country. Droughts are also common phenomena which greatly affect the availability of water resources. Managed aquifer recharge (MAR) schemes are being taken into consideration to enhance the underground water storage capacity of the country. The present study constitutes the first assessment for the identification of suitable sites for the implementation of MAR technology spreading methods (SM) in Costa Rica. The suitable sites are identified by means of a geographic information system multi-criteria decision analysis (GIS-MCDA) based on four criteria: hydrogeological aptitude, terrain slope, top soil texture and drainage network density. Four steps are performed in order to identify these sites: problem definition, screening for suitable areas, suitability mapping, and sensitivity analysis. The suitability map was divided in two zones after the screening: suitable and unsuitable, the first zone was further divided in five classes according to the weighted linear combination (WLC) ranking. The results indicate that 61% of the country is suitable for conducting SM. This map is a tool for future implementation of MAR techniques in the country.
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Johannisson, Wilhelm. "Light Weight Suspension System for KTH Research Concept Vehicle : DESIGN AND CONSTRUCTION OF A COMPOSITE SUSPENSION SYSTEM WITH FOCUS ON APPLICATION IN KTH RESEARCH CONCEPT VEHICLE WITH ANALYSIS OF FUTURE SOLUTIONS SUITABLE FOR THE AUTOMOTIVE INDUSTRY." Thesis, KTH, Lättkonstruktioner, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-223389.
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I detta projekt undersöks konstruktionen av en transversell bladfjäder föranvändning i en bil, byggd i kompositmaterial. En transversell bladfjäder är en annanlösning för att implementera det som traditionellt är spiralfjäder i bilenhjulupphängning. Istället används en fjäder som fungerar genom balkböjning. Detfinns sedan tidigare flera olika lösningar på hur sen sådan bladfjäder kan fungera,däribland lösningar där bladfjädern sträcker sig från sida till sida på bilden ochdärmed kallas transversell bladfjäder. Denna lösningen har även den extraegenskapen att bladfjädern fungerar som en krängningshämmare för bilen.Den transversella bladfjädern konstrueras för en forskningsbil på Kungliga TekniskaHögskolan (KTH). Denna bil är ett konceptfordon konstruerat för att efterlikna enliten stadsbil och väger ca. 600 𝑘𝑔. Hjulupphängningen på denna bil är av typenDouble Wishbone med spiralfjädrar och dämpare. Hjulupphängningen ärkonstruerad modulärt och är exakt densamma för fram och bak hjulupphängning,och ursprungliga fästpunkter på bilen hålls intakta. Konstruktionen av dentransversella bladfjädern görs för att efterlikna de egenskaper som det ursprungligasystemet för hjulupphängningen.Analytisk optimering används primärt för att hitta en första lösning, sedanimplementeras denna lösning i FEM-programvara för att vidare undersöka dessegenskaper och konstruktion. Detta leder fram till en slutgiltig lösning som uppfyllerkravspecifikationerna, varvid en fullskalig transversell bladfjäder byggs och prövasom den uppfyller kravspecifikationerna.In this project, the design of a transverse leaf spring for an automotive vehicle isinvestigated. A transverse leaf spring is a concept for implementing the traditionalcoil spring for the vehicle, into a spring operating through beam bending. There aredifferent constructions and layouts of said leaf spring developed previously. Onesolution is where the spring is spanning from one side to the other of the vehicle,making it a transverse leaf spring. This solution has an extra gain; it is also providingan anti-roll bar action to the ride characteristics of the vehicle.The design of the transverse leaf spring is made for an automotive research vehicle atRoyal Institute of Technology (KTH). This vehicle is designed to represent a smallcity vehicle, weighing approximately 600 𝑘𝑔. The design of the original suspensionsystem is of the type Double Wishbone with push rod and coil springs with damper.The system is modular and exactly the same for the front and rear of the vehicle.Original mounting positions on the vehicle are to be kept intact. The design of thetransverse leaf spring is made in order to mimic the exact characteristics of theoriginal suspension system.First analytical optimizations are made in order to find an initial solution. This designis then implemented in FEM-software in order to further investigate thecharacteristics and design. A final design is found that is fulfilling the requirementsand a full scale version of the transverse leaf spring is built and examined withregards to its fulfilment of requirements.
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Mallangi, Siva Sai Reddy. "Low-Power Policies Based on DVFS for the MUSEIC v2 System-on-Chip." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-229443.
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Multi functional health monitoring wearable devices are quite prominent these days. Usually these devices are battery-operated and consequently are limited by their battery life (from few hours to a few weeks depending on the application). Of late, it was realized that these devices, which are currently being operated at fixed voltage and frequency, are capable of operating at multiple voltages and frequencies. By switching these voltages and frequencies to lower values based upon power requirements, these devices can achieve tremendous benefits in the form of energy savings. Dynamic Voltage and Frequency Scaling (DVFS) techniques have proven to be handy in this situation for an efficient trade-off between energy and timely behavior. Within imec, wearable devices make use of the indigenously developed MUSEIC v2 (Multi Sensor Integrated circuit version 2.0). This system is optimized for efficient and accurate collection, processing, and transfer of data from multiple (health) sensors. MUSEIC v2 has limited means in controlling the voltage and frequency dynamically. In this thesis we explore how traditional DVFS techniques can be applied to the MUSEIC v2. Experiments were conducted to find out the optimum power modes to efficiently operate and also to scale up-down the supply voltage and frequency. Considering the overhead caused when switching voltage and frequency, transition analysis was also done. Real-time and non real-time benchmarks were implemented based on these techniques and their performance results were obtained and analyzed. In this process, several state of the art scheduling algorithms and scaling techniques were reviewed in identifying a suitable technique. Using our proposed scaling technique implementation, we have achieved 86.95% power reduction in average, in contrast to the conventional way of the MUSEIC v2 chip’s processor operating at a fixed voltage and frequency. Techniques that include light sleep and deep sleep mode were also studied and implemented, which tested the system’s capability in accommodating Dynamic Power Management (DPM) techniques that can achieve greater benefits. A novel approach for implementing the deep sleep mechanism was also proposed and found that it can obtain up to 71.54% power savings, when compared to a traditional way of executing deep sleep mode.Nuförtiden så har multifunktionella bärbara hälsoenheter fått en betydande roll. Dessa enheter drivs vanligtvis av batterier och är därför begränsade av batteritiden (från ett par timmar till ett par veckor beroende på tillämpningen). På senaste tiden har det framkommit att dessa enheter som används vid en fast spänning och frekvens kan användas vid flera spänningar och frekvenser. Genom att byta till lägre spänning och frekvens på grund av effektbehov så kan enheterna få enorma fördelar när det kommer till energibesparing. Dynamisk skalning av spänning och frekvens-tekniker (såkallad Dynamic Voltage and Frequency Scaling, DVFS) har visat sig vara användbara i detta sammanhang för en effektiv avvägning mellan energi och beteende. Hos Imec så använder sig bärbara enheter av den internt utvecklade MUSEIC v2 (Multi Sensor Integrated circuit version 2.0). Systemet är optimerat för effektiv och korrekt insamling, bearbetning och överföring av data från flera (hälso) sensorer. MUSEIC v2 har begränsad möjlighet att styra spänningen och frekvensen dynamiskt. I detta examensarbete undersöker vi hur traditionella DVFS-tekniker kan appliceras på MUSEIC v2. Experiment utfördes för att ta reda på de optimala effektlägena och för att effektivt kunna styra och även skala upp matningsspänningen och frekvensen. Eftersom att ”overhead” skapades vid växling av spänning och frekvens gjordes också en övergångsanalys. Realtidsoch icke-realtidskalkyler genomfördes baserat på dessa tekniker och resultaten sammanställdes och analyserades. I denna process granskades flera toppmoderna schemaläggningsalgoritmer och skalningstekniker för att hitta en lämplig teknik. Genom att använda vår föreslagna skalningsteknikimplementering har vi uppnått 86,95% effektreduktion i jämförelse med det konventionella sättet att MUSEIC v2-chipets processor arbetar med en fast spänning och frekvens. Tekniker som inkluderar lätt sömn och djupt sömnläge studerades och implementerades, vilket testade systemets förmåga att tillgodose DPM-tekniker (Dynamic Power Management) som kan uppnå ännu större fördelar. En ny metod för att genomföra den djupa sömnmekanismen föreslogs också och enligt erhållna resultat så kan den ge upp till 71,54% lägre energiförbrukning jämfört med det traditionella sättet att implementera djupt sömnläge.
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Chen, Ker-En, and 陳克任. "Design of Wideband Planar Antenna Suitable for Biomedical Applications." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/21928286993479809252.
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博士國立彰化師範大學
電機工程學系
99
Abstract In this dissertation, the designs of ultra-wideband (UWB) antennas fed by a coplanar waveguide and super wideband (SWB) antennas fed by a microstrip line are studied respectively. Three antenna designs are presented and their respective prototypes are also implemented. Both measured and simulated results confirm the validity of the proposed designs. The first antenna studied in Chapter 2 is a compact UWB antenna in which a number of open slots are embedded on a U-shaped radiating patch. By carefully adjusting the dimensions of the open slots, the impedance matching of the studied UWB antenna can be achieved and the obtained 10 dB return-loss impedance bandwidth is about 121.5 %, covering from 2.93 to 12 GHz. For comparing with previously reported compact designs, a figure of merit, BDR, which is the ratio of impedance bandwidth to antenna area, is introduced and discussed. The results demonstrate that the BDR of the proposed design is 110 % higher than that of the reference antenna. As a result, the proposed antenna has a compact size as well as a wideband impedance bandwidth, and it can be used as a wearable antenna for seamless-biomedical applications. The second antenna described in Chapter 3 is an egg-shaped planar monopole antenna with SWB operations. The antenna gives an impedance bandwidth of 170 %, corresponding to a ratio bandwidth of more than 12:1. Such an operating bandwidth can cover the frequency bands of present wireless mobile communication systems as well as the UWB systems. Therefore, the antenna can serve as a relay antenna in the seamless-biomedical applications. The third antenna investigated in Chapter 4 is a modification of the second antenna. By embedding complementary-fractal slots on the ground plane, the excited surface current paths on ground plane are meandered. From the measured results, it is found that the lowest operating frequency is decreased by 13 %, implying a size reduction of about 25 %. Moreover, the antenna still has an impedance bandwidth of more than 170 % and a part of the impedance bandwidth is with the return loss of large than 14 dB, which is required for reducing the effects of operation environment.
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Cheng, Fu-Lung, and 鄭福龍. "Investigation of MOS-BJT-NDR Devices and Applications Suitable for VLSI Design." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/26d53r.
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碩士崑山科技大學
電子工程研究所
91
In this thesis we propose MOS-BJT-NDR circuits to fulfill the NDR characteristics of traditional resonant tunneling diodes. We also utilize the basic MOS-BJT-NDR cell to proceed with further study by simulation, analysis and design. In the beginning we present three different kinds of MOS-BJT-NDR circuits and put these circuits into parallel or serial structure to achieve multi-peak NDR circuits. These MOS-BJT-NDR circuits can be used as resonant tunneling diode device without considering the match problem of crystal lattice. It has the advantage of adjusting the peak current or valley current easily. We use H-SPICE software to simulate those MOS-BJT-NDR circuits. Not only analyze these circuits but also design it. In order to prove the possibility and reliability, we use detailed simulation results to implement these NDR circuits into IC chips by TSMC 0.35SiGe_3P3M process. We verify those I-V characteristics of NDR circuits by Tektronix 370B and HP 4155A instruments and compare with H-SPICE simulation results. In the application of NDR circuits, we base on those MOS-BJT-NDR circuits to acquire multi-peak circuits by parallel or serial structure. Finally, we propose a new NDR circuit. It has the high-speed character. We will accomplish the new multi-peak NDR circuit by H-SPICE software. It will have a high potential in digital logic application.
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Chen, Yichao. "Design and Evaluation of Façade-Integrated Solar Technologies Suitable for High-Latitude Applications." Thesis, 2012. http://spectrum.library.concordia.ca/974546/8/Chen_Yichao_MASc_F2012.pdf.
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This thesis investigates the design and evaluation of façade-integrated solar technologies optimized for high latitude locations. To address the climatic and socio-economic challenges pertaining to Northern housing, a pre-fabricated active envelope system is designed to generate energy from renewable sources while functioning effectively as a passive building enclosure.
An experimental prototype is developed using high-performance structural insulated panel (SIP) wall with the capacity to accommodate several modular solar components including unglazed transpired collector (UTC), transpired glazing (TG), and photovoltaic/thermal (PV/T) systems. Ten collector configurations based on the experimental prototype have been evaluated at the state-of-the-art Solar Simulator and Environmental Chamber (SSEC) laboratory, which allows for a compressed timeline and repeatable results compared to outdoor experiments.
Custom thermal network models for the different collector configurations are developed for steady state and annual analyses. Simulation results are compared to and validated by experimental data from the SSEC laboratory. The potential of energy conservation and renewable generation by the proposed solar facades is estimated using typical meteorological year weather data of three northern Canadian cities.
Two case studies, involving existing façade-integrated solar technologies at high latitudes, are presented in the Appendix. Field inspections were conducted for a 17-year-old photovoltaic façade in Nunavut, and six Unglazed Transpired Collector (UTC) façade installations in Northwest Territories. In an effort to connect with reality and to investigate the suitability of building integrated solar technologies, the fieldwork examined and discussed the current state of performance and operation issues for the existing solar installations at high latitudes.
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Raposo, Antonio [Verfasser]. "Systematic devolopment [development] of formulations suitable for pulmonary applications by nebulisation / presented by Antonio Raposo." 2007. http://d-nb.info/986003328/34.
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Young, Jinn-Wien, and 楊進文. "Study on the Design and Applications of Functional NDR Circuits Suitable for Silicon VLSI Technology." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/54196122877367794198.
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碩士國立成功大學
電機工程學系
87
In this thesis, functional NDR circuits suitable for silicon VLSI technology are proposed and investigated. The present study is mainly focus on the design and analysis new NDR circuits and realization of related circuit applications. First of all, the I-V characteristics of NDR circuits is simulated by using load-line method and piecewise linear approximation. Not only the hysteresis phenomena of NDR circuits in series are analyzed, but also equations governing the resultant I-V characteristics observed in two series-connected NDR circuits are derived. Experimental results show that the equations derived can predict the resultant I-V characteristics of NDR circuits very well. Furthermore, several new NDR circuits based on BiCMOS or CMOS technology are presented and analyzed. These new NDR circuits have advantages of high PVCR, simple in circuit structure, less chip area and power loss, etc. Based on these novel NDR circuits, experimental results on series-connected and parallel-connected NDR circuits are reported and discussed. Related equations governing the I-V characteristics are derived. It is found that the measured I-V characteristics are in good agreement with the calculated ones. NDR circuits with adjustable PVCR are also proposed and analyzed. Examples on the applications of NDR circuits have also been demonstrated in this work. Frequency multiplier, three and five state logic circuits based on NDR circuits are designed and implemented. The operation principle of the application circuits are described. Moreover, a novel A/D converter based on NDR circuits is proposed and realized for the first time. It is expected that the NDR circuits presented in this thesis offer an alternative way other than conventional scaling down rule for further reducing chip area in VLSI fabrication.
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Chen, Wen-Hwa, and 陳文華. "Applications of Analytic Hierarchy Process on Suitable Site Selections for Outdoor Environmental Education among Senior High Schools—Case Study about Leisure Farms." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/2uqrg3.
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碩士台灣首府大學
休閒管理學系碩士班
101
The aim of this research is to apply an Analytic Hierarchy Process to help senior high schools in order to develop a model of selecting the suitable leisure farm as the outdoor place for environmental education. First, literature reviews are adopted in this research to find out the suitable evaluative criteria of environmental education to design the first questionnaire. The first questionnaires are filled in and screened by the experts in accordance with a five point Likert Scale. Next, the second questionnaire is designed according to the results from the first questionnaire survey. The research model applies the “Analytic Hierarchy Process (AHP)” to determine the relative weights of evaluative criteria, then ranks the alternatives and selects the suitable leisure farm for outdoor environmental education. Additionally, a national vocational senior high school in Tainan City is taken as the model example in this research, and the third questionnaires are filled out by the decision makers of the school to prove how a suitable leisure farm for outdoor environmental education is selected by applying this model. The results indicates that experts think highly of the four major indicators in order are environmental behavior, environmental attitude, environmental awareness, and environmental knowledge. As for the evaluative criteria, the top three major indicators in order are responsibilities for environment, educational action, and relationship between environment and individual mental and physical health. Hopefully, these results will provide a research reference for the decision makers of schools who will be able to apply the model in accordance with distinct environmental aims to select the suitable leisure farm as the outdoor place for environmental education, and some references for other researches.
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Lai, Xiang Lin, and 賴祥林. "Battery Management System Suitable for Smart Grid and EV Application." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/u9juj6.
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碩士國立勤益科技大學
電機工程系
105
This thesis developed an advanced battery management system (BMS) for multiple lithium iron phosphate (LFP) battery modules connected in series. Multiple battery modules connected in series is commonly utilized in both smart grid and electrical vehicle (EV) industry to facilitate high voltage requirement. The developed BMS was based on a master and slave topology design. Each 24 V battery module with 8 cells connected in series was managed by a module BMS, which served as a slave. A main control board, which was a master, coordinated two way communication between master and 16 slaves. The main control board executed battery management actions when necessary. Communication adopted in the current study is Can bus 2.0B. The developed BMS was shown to measure battery parameters accurately; protect cells from overcharging and over discharging according to preset limits; conduct innovative active cell balance to compensate cell capacity inconsistencies; and predict reliable battery state of charge (SOC) with devised hybrid SOC estimation method. A vehicle information system, based on Labview, with vehicle data acquisition function was designed in the current work. This Labview vehicle information system, providing both real-time presentation and post analysis functions, facilitated long term performance evaluation of the developed BMS in the current thesis. Can Bus communication allowed the current BMS to perform reliable and efficient management tasks in the high voltage battery system. Modular BMS and master were connected in a communication bus, where prioritized messages, sent and received by 16 modular BMS, master, and Labview HMI were clustered. Packets of Can Bus messages were coordinated by application layer protocol. Data collision was resolved by the built in application layer protocol. A robust and efficient Can Bus communication system was resulted. A reconstruction mode of the communication system was also designed to relieve inevitable crash due to unexpected EMI. Stable and reliable communication was therefore assured in the current study. The developed BMS with master and slave topology was applied to a used LFP battery system of rated 420V/100Ah in the current study. Extensive charging and discharging cycles were conducted and extracted battery data by the Labview HMI were thoroughly analyzed. Experimental results confirmed the reliability of the developed BMS while under numerous electromagnetic interference. Innovative balance method was proved to efficiently compensate imbalance problems within battery modules and among battery modules. Range extension effect was also observed in the experiments.
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Lai, Shih-Ting, and 賴詩婷. "Discuss the Suitable Application Environment of TOC Demand Pull Theory." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/29121432510466045702.
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碩士國立交通大學
工業工程與管理學系
98
Dr. Goldratt proposed Demand-pull theory, one of replenishment methods developed from Theory of Constrains. Demand-pull theory sets the number of replenishment by actual shipments instead of forecast demands.Previous studies have proved that Demand-pull theory is a good replenishment mechanism, which improves the rate of out of stock, reduces the average inventory, and increases the product availabilities effectively. However, any management approach must apply in the right environment to be effective. There are still few studies about an applicable environment for Demand-pull theory.This study proposes the best applicable ratio of "replenishment lead time" and "product life cycle" by simulations and real business data. In addition, the author suggests to establish a central warehouse for improving effectiveness in the unsuitable environment.
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Masina, Nonhlanhla Precious. "Chemical modification of sago beads for suitable application in drug delivery." Thesis, 2016. http://hdl.handle.net/10539/23113.
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Yeh, Chin-Tsung, and 葉志宗. "Preparation of Chitosan-based tissue ngineering scaffold suitable for drug delivery application." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/4cvdx6.
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碩士國立臺北科技大學
化學工程研究所
97
It’s known that crosslinking of chitosan can made beads and films to treat as carrier of drug delivery system. Or made to porous scaffold and create a stiffer surface to enhance cell attachment and proliferation. Porous scaffold also can treat to as carrier of growing factor, anti-inflammation drug and anti-bacterial drug for in vivo experiment, to study drug delivery behavior. But less bypast research were study to drug release efficiency and drug working time. The purpose of ours research was to modify porous chitosan (C) tissue culture scaffolds and to make them suitable for controlled drug release. Chitosan (C) and chitosan differentiate to crosslinking with alginate (A), pectin (P) and genipin (G) in different proportions were made into porous scaffolds and thin films. FT-IR and thermal gravimetric analysis were used to define the type of crosslink. The hydrophility (contact angle) was tested as plate. Morphology (SEM), mechanical property (Young’s modulus) and enzymatic degradation of the CS hybrid scaffolds were measured. In the experiment, anti-inflammation drug [Pentoxifylline (PTX)] was to take as the model drug to determine their controlled release properties (swell ratio, drug release efficiency and anti-inflammatory test) and biological property (cell adherent) was tested as well. Amide (N-C=O) bonding was seen in FT-IR spectra of C/G hybrid scaffold. Amine/Carboxyl mixing peak was seen in FT-IR spectra of C/A and C/P scaffold. And the strength of signals was change with crosslinking proportion. New decomposition temperature of C/A and C/P were between C and crossslinking agents. That was confirmed the driving force of crosslinking with ALG and PEC were ionic attraction, and made ionic bond. Because the covalent bond between C and G, C/G had higher decomposition temperature. The C/A and C/P scaffolds had smaller pores and a more compact structure than the CS scaffolds. The pores of C/G scaffolds were similar to CS scaffold. C/A and C/P were more hydrophilic, but C/G was less hydrophilic. All Chitosan hybrid scaffolds were mechanically stronger (higher Young’s modulus) and less susceptible to enzymatic degradation than chitosan scaffolds. Due to the hydrophilicity, osteoblast (7F2) adhered of C/A and C/P was faster than the chitosan films. But C/G was slower than chitosan films. On the controlled release perspective, as a result of the crosslinking and the charge of 3-D structure scaffold and relation of hydrophility, Chitosan hybrid scaffolds had lower swell ratio and lower drug release efficiency than chitosan scaffolds. In anti-inflammatory test, due to the slow release property of hybrid scaffolds, the efficacy of drug were be enhanced. The anti-inflammation drug can restrain inflammation helpful In summary, the Chitosan hybrid scaffolds were better for slow down the anti-inflammation drug release efficiency. And lengthen the working time of drug release.
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Kuo, Shin-Bin, and 郭士賓. "Design and Application of MOS-NDR Devices and Circuits Suitable for CMOS Technology." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/kk328s.
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碩士崑山科技大學
電子工程研究所
92
The general conventionally negative differential resistance (NDR) device is resonant-tunneling-diode (RTD) device. This RTD device is fabricated by the technique of compound semiconductor. This kind of NDR device is possessed of the high electron mobility. For the past years, the NDR device had been applied in some circuits such as analog/digital converter, adder, multiple-value multiplexer, and logic circuit. However in our work, we proposed a new NDR device that is composed of metal-oxide-semiconductor field-effect-transistor (MOS) devices. Because this NDR device is consisted of three NMOS and one PMOS devices, we call this novel NDR device as MOS-NDR device. In experiment, we fabricate this MOS-NDR device by standard 0.35μm 1P4M CMOS process. This MOS-NDR device could exhibit the NDR current-voltage (I-V) curve with different peak and valley just by suitably arranging the width and length parameters of the MOS devices. Therefore, this kind of device possessed a wide range of modulation in the I-V characteristics. Especially in the applied circuit design, this MOS-NDR device provided the convenience in consisted of other devices and circuits based on the Silicon substrate. These applications could be fabricated by the CMOS or BiCMOS technique that provided by the chip implementation center (CIC). So our proposed MOS-NDR device will be very useful in integrated circuit, and to achieve the system on a chip (SoC) subject. The multiple-peak NDR devices provide a good opportunity to implement functional circuit such as multiple-valued logic and memory application with greatly reduced the circuit complexity and the number of devices. Numerous applications create the multiple-peak I-V characteristics with two or more NDR devices connected in series or in parallel. Therefore, we also analyzed, discussed, and fabricated the multiple-peak NDR devices in this work. A monostable-bistable transition logic element (MOBILE), employing two NDR devices connected in series, is a functional logic gate. In our structure, two NDR devices connected in series, one of the NDR devices and a NMOS are connected in parallel. Therefore, the peak current of this NDR device can be controlled by means of an applied gate voltage of the NMOS device. For a two-input MOBILE gate, this implies the possibility of a variable function logic gate. We have proposed some logic circuits based on the MOBILE theory in this dissertation.
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Zhang, Hong-Yi, and 張弘毅. "Application of Fuzzy Sets Theory on Suitable Site Selection─ ─ An Illustration of Chamaecyparis formomensis." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/94328761120760884200.
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碩士國立中興大學
森林學系
82
The study utilize and instance of Chamaecyparis formominsis specices,utilize membership function of fuzzy sets established the associations of suitable site between physiological characteristics of tree species and environmental variables, to improve existing state to express the method of forest factors of unpredictable range of suitable site ;and utilize the digitial elevation model analysed the physical environmental of spacial forest site,combined the Geographic Information Systems of the integrate information management systems ,executed the analysis of suite site of Chamaecyparis formomensis.The results show that utilizing fuzzy sets to judgement suitable site of tree spcies ,and matches the spacial data base fo GIS , the method may offer the large area of the forest management when we find the reference of buillding forest suitable site.
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Lin, Kai-Hsun, and 林楷勛. "Intrusion Prevention System Suitable for Protecting Application Servers from Distributed Denial of Service Attacks." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/03795956180412960338.
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碩士國立清華大學
資訊系統與應用研究所
92
Dos means that the hacker attempts to degrade the service offered to normal end users. In general, The Dos can be separated in three main types. 1) Exploiting the loophole of system to destroy the whole System. 2) Exploiting the weakness of protocol to block normal users. 3) Using large throughput to make the server hard to service normal users’ request. Above three types, exploiting the weakness of protocol is the hardest to defense. TCP SYN flooding attack is a well-known denial of service (DoS) attack that exploits TCP three-way handshake vulnerability. Recently many famous web sites face a stronger of denial of service attack known as Distributed Denial of Service attack (DDoS). Organizations deploying security measures such as firewalls, and intrusion detection systems (IDS) could face the traditional DoS attack. There is no complete solution neither for protection from SYN Flooding DDoS attack. This paper analyzes a TCP SYN Flooding attack and presents a protection method to protect from SYN Flooding attacks launched by DoS/DDoS tool. It protects the server by generating a legal access database; monitor the backlog queue entries of server and IP filtering. The main advantages are its strong ability to defense TCP SYN Flooding attack, and minimal the delay for legal user access. We also analyze application layer Dos Attack method called TCP keep alive in this paper, and test its attack method. The protect system we proposed also can protect from this attack.
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王惠英. "Application and Evaluation of a Suitable Kitchen Facilities in Home Living, in Changhua,Taiwan." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/2nw4h4.
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碩士大葉大學
設計暨藝術學院碩士在職專班
105
The purpose of this study is to understand the usage of home kitchens in Taiwan and to find out what should be improved. Due to the research restrictions, the study was focused on the area of Changhua county. As to the research design, the study used a mixed research method to collect data, including quantitative questionnaires and qualitative interviews. The first questionnaire was designed to survey housewives, with 88 valid questionnaires collected; and the other questionnaire was designed to survey interior design majors to better understand the usage of home kitchen equipment. Semi-structured interviews contained pre-determined set of open questions, developed by the researcher, which allowed the interviewer to explore particular themes or responses further. The questionnaire designed to survey the housewives includes questions to assesses their usage level, number of accidents, user’s physical condition, kitchen hardware equipment, and convenience to the user. The questionnaire designed to survey interior design students includes questions to investigate the home kitchen equipment and the user’s psychological reaction. The respondents were not limited in the area of Changhua county but extended to include students from Malaysia and Hong Kong, which allowed the researcher to further understand the problem of cooking fume to non-Western styles of cooking. The results, derived from the questionnaires and interviews, found either apartment-style housing or traditional single housing have modern kitchen equipment. However, most participants were not satisfied with the kitchen ventilation in eliminating vapors and odors caused by cooking. Nevertheless, participants overall responded to the home kitchen equipment and their usage positively. Key words: Taiwan Changhua, kitchen, semi-structured interview
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Wu, Hsin-Chin, and 吳欣瑾. "Application of GIS Techniques on the Selection of Suitable Plantation Species for Chiayi National Forest." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/09231250832732919845.
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碩士國立嘉義大學
森林暨自然資源研究所
94
Since typhoon Herb attack Taiwan with torrential rain in 1996, during this period, the strong rainfall intensity brought a tremendous damage, then government actively prompted 「All People Reforestation Movement Reforestation Plan」 to enhance forest coverage. The ecological conservation awareness has been more prominent in Taiwan. It is this very rise to prominence that has limited deforestation on national forest. Not only import but also our artificial forestry plays an important and wood self-supply, it books no delay to afforest optimum species. The study site is located in Chiayi Nation Forest. To conform with ecological environment characters, this study use watershed and 20m×20m pixel as the analytic units, and combine with four variables which are elevation, slope, aspect and soil type to build the database and knowledge base to select the species for plantation of Chiayi National Forest using GIS techniques. Knowledge base follows fuzzy logic approach, It does not only conform to ecological characters, but also could amend the knowledgebase according to different environments and demands to ecosystem environment variation features. The result showed that the first order unit of watershed and 20 m×20 m pixel units as the analytic units, they can achieve the suitability analysis, but 20m×20m pixel units which need a lot of time, complicated in analyzing and follow-up treatment and its distribution is too scattered, manager have to plan further. The analytic units can choice depend on the managers’ demand. The result of suitability analysis compared with the existed plantation we can find out that the area of former is bigger than latter, manager can reference the analysis result to advance and adjust the percentage of afforestation area. Key words：All People Reforestation Movement Reforestation Plan, Knowledge base, fuzzy logic, GIS
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Leu, Hong-Ting, and 呂鴻廷. "Application of Kriging Method to The Most Suitable Place Estimation of Rainfall Station in Chen Yu Lan Watershed." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/10794972983880414848.
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碩士國立中興大學
土木工程學系
93
The rainfall data is important information for water resource, disaster reduction and hydraulic engineering. For instance, the basis of warning system for debris flow is the rainfall volume. However, hydraulic engineering design also needs rainfall data to estimate the design storm. If rainfall data is incomplete or raingauges is far to design location, the calculation of rainfall volume has the risk of over or under estimation. It will induce the problem of over/ insufficient design in engineering structures. Hence, how to set up suitable raingauges for the aid of estimating rainfall data accurately is the basic problem in hydraulic engineering. This study employs the Kringing estimation model of regionalized variables to find the best adding position for the raingauges. At first, using the spatial location and rainfall data of known rainguages, the spatial structure appraising ability is estimated for adding any virtual raingauge in the watershed. Assuming the adding raingauge can improve the spatial structure appraising ability, the location of raingauge is the best place to put a new raingauge. Above assumption is implemented in Chen-Yeou-Lan watershed. At first, the Kriging method is used to analyze rainfall data to obtain the global kriging variance from 11 raingagues with different positions. Then the watershed is divided into 112 meshes in which the center of mesh is the position of raingagues. The algorithm of recursive method is carried out, and the best adding position is found at TM2 coordinates (232000, 2612000), in which the global kriging variable is minimum comparing with the other meshes in the watershed. It shows this coordinates is the best gauge station in Chen-YU-Lan watershed.
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LIN, WAN-RU, and 林宛儒. "Application of GIS in Researching the Suitable Location for a Senior Day Care Center - A Case Study of Taichung City." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/82qwne.
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碩士逢甲大學
土地管理學系
107
This research attempted to find out external environmental factors which influence the location selection of senior day care centers with the aged' perspectives. We used the analytic hierarchy process (AHP) to establish a hierarchical structure and to calculate the weight of factors. The spatial analysis of geographic information systems (GIS) was then utilized to find out suitable areas for the elderly in Taichung city. A senior day care center should satisfy their healthy, secure, convenient and comfortable needs. The results of AHP analysis revealed that the most important factor was the medical facilities, followed by the recreational facilities, and the last one was the obnoxious facilities. The five preceding important factors were emergency hospital, health center/clinics, parks, police bureau/fire bureau and markets/supermarkets. The GIS spatial analysis used the weight of factors to find the possible regions for senior day care centers in Taichung city. The result showed the most suitable areas were located at the Situn district, and Beitun district via analyzing coverage area of facilities. These regions could be completely covered within the range of medical facilities, life function facilities and recreational facilities. The results showed that the locations of the senior day care centers could meet the needs of senior citizens.
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Chen, Yen-Cheng, and 陳彥丞. "Application of rainfall erosion index to investigate the suitable construction months for slopeland development and calculate the temporary sedimentation amoutnt." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/91938685375757093164.
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碩士國立中興大學
水土保持學系所
100
Due to the topographical constraints, excavation and soil preparation are necessary during developing a large area of the building, which will cause erosion disaster. As the result, it is necessary to construct a temporary sedimentation pond. According the handbook of soil loose estimantion, the seasonal rainfall distribution is different in vary regions, the annual rainfall erosion is often unable to describe the erosion potential of seasonal rainfall in the region within one year. If we want to base on the seasonal rainfall erosion characteristics within one year, as the development, site preparation and suitable soil and water conservation practice, the monthly rainfall erosion index distribution is necessary. This study focused on the development of a small area, the soil and water conservation construction period is within three months. The 10 meteorological partition was based on literatures. The rainy season and non-rainy season were also classified. The monthly rainfall erosion index distribution for 10 meteorological regions was constructed. Overlaping the rainy and non-rainy season with monthly rainfall erosion index distribution, we will sort out the best construction period and worest construction period. The soil loss of the whole year, the best construction period, and worst construction period were calculated according the monthly rainfall erosion index distribution and parmeters retrived from Soil Loss Prediction Handbook respectively. The sedimentation yields during the construction period were also calculated. From the results , the rationality of temporary sedimentation pond volumn will be discussed. The important conclusions of this study are following: (1) Inappropriate construction period was mainly from June to September, this period is rainy and typhoon season, compared with other months, rainfall and rainfall erosion index are highest . (2) October to January is non-rainy season mainly in the central and southern region, rainfall erosion index is the least, so it is the most suitable months for construction. December to March has least rainfall in eastern and northern area (Keelung exception), rainfall erosion index characteristics of the partition of the monthly percentage distribution is minimum, therefore this period is most suitable for the construction. (3)Keelung is affected by the northeast monsoon, resulting in raining throughout the whole year, however, the typhoon brought heavy rain rainfall intensity is greater affected than the northeast monsoon drizzle, the typhoon season monthly rainfall erosion index slightly higher than other month during the northeast monsoon rainfall erosion index, it is not suitable for the construction period from August to October. (4) USLE was applied to calculate sedimentation yield for the base of temporary sedimentation pond design. If we use the whole year Rm, which will over estimate the soil loss. (5) If the construction was conducted during the best period, which will reduce the 1/3 soil loss, and the tempery sedimentation pond volumn can be reduced.
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Rowley, James William. "Design, construction and testing of a prototype fin-line magic-tee and fin-line monopulse system suitable for millimeter-wave application." Thesis, 1985. http://hdl.handle.net/10945/21250.
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Huang, Jhih-Ping, and 黃祉萍. "Quasi-static Cutting Mechanics of Underground Mechanical Excavation and its Suitable Indices: Application to Design and Construction of Straight / Curved Tunnel and Pipeline System." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/4jy3zd.
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碩士國立臺灣科技大學
營建工程系
104
To improve mass transit construction and the penetration of sewage reticulation, Taiwan's underground excavation works play a critical role. Mechanical excavation projects are increasing with more infrastructure development. However, most of researches emphasis on geotechnical safety or stability without the assessment of efficiency and suitability of the excavation methods. Some of the mechanical excavation systems used are based on studies done in Europe, Japan and elsewhere by foreign manufacturers hence cannot be relied on to give the standards for design and construction in Taiwan as Japan and European experiences are not necessarily appropriate to conditions in Taiwan. Thus to promote the relevant tunneling technology in Taiwan, there is need for more understandings on this topic. This study plan aims at the tunneling excavation with different dig scales. The proposal seeks to establish a novel, general model that considers the vary machines (tunnel boring machine, shield tunnel and pipe jacking ), types (earth pressure balance, slurry pressure balance, thick-mud) and geological cases (soil, gravel and rock) in one unified model to analyze. The straight/curved thrust and torque will be calculated for a blunt/sharp, wedge/cone cutter from global cutting to local dragging/indentation of a tunneling machine respectively. This study aims at investigation and application for both design and construction such as turnkey project. For “design period”: Besides the traditional equations, the study examined more key factors: single cutter to doubled-cutters, the axial gradient of tunnel, floating power and different working condition (active or passive earth pressure, machine or pipe touch tight or densification by geological gable). For “construction period”: By using dimensional analysis, the proposed model generalizes geological characteristics corresponding to two types of cutting forces (thrust and torque) to evaluate their excavation progress with penetration rate. Furthermore, the normalizedSuitable Indices: can be used not only to estimate the functionality and efficiency of cutting machine adopted for tunnel project, but also to offer a warning information for inadequate cutting strategy. To obtain feasibility of normalizedSuitable Indices: applied to geological prediction by using data mining. This research obtained the following results with two study cases in Taipei: Design parts: (1) Low plasticity clay from first case studies, thrust has been approaching the lower bound at 0k + 398 m, namely in near field generating active earth pressure failure; and settlement may be happened in the far field. (2) Sandstone and shale interbed from first case studies, thrust maximum occurs at 1k + 342 m, the outer cutters due to wear, excavation the aperture and shield machine shell the outer diameter are almost the same, resulting in shield machine were shackled in the underground. Construction parts: Combined previous literatures and this research, as long as the approximate geological materials will cluster is closer either: ductile (soil) thrust index between 10^1 to 10^2, brittle materials (rock-like) between 10^0 and 10^-2, composite material (gravel) between 10^-3 and 10^-1. Data mining: WEKA analysis showed that the difference rings parameters between previous and now value can be predicted geology about the front of 2 times shield machine diameter, two case studies above 80% high accuracy.
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McGregor, Marié. "The application of affirmative action in employment law with specific reference to the beneficiaries: a comparative study." Thesis, 2005. http://hdl.handle.net/10500/2531.
Full textAbstract:
South African affirmative action law in the workplace is in its infancy. Yet some concepts in this context have already proven to be unclear or in need of interpretation, or are lacking.
This thesis focuses on the beneficiaries of affirmative action in employment law. The Employment Equity Act (EEA) creates `designated groups' ─ black people, women and people with disabilities ─ as the beneficiaries of affirmative action. It lays down two requirements for beneficiaries of affirmative action which are investigated: (a) beneficiaries must be from the designated groups - in this regard, the question that arises is whether, having been categorised as disadvantaged, persons are presumed to be de facto disadvantaged and entitled to benefit from affirmative action, or whether further evidence of actual past disadvantage is required; and (b) beneficiaries must be `suitably qualified'. In addition, citizenship as a third requirement for beneficiaries of affirmative action has been mooted in case law. This is evaluated against modern interpretation theory, the Constitution and discrimination law.
Against the background of a comparative investigation of the position in the US and Canada, and under international law, specific findings and recommendations are made in respect of South African affirmative action law. These relate to the interpretation of the concept `disadvantage', to a pragmatic and contextualised approach to the notion `degrees of disadvantage', to the recognition of the concept `multiple disadvantage', to the clarification of the meaning and application of the concept `suitably qualified' in a code of good practice, and to a policy decision by government to ensure that affirmative action measures apply mainly to South African citizens who otherwise qualify to benefit.
To this end, certain amendments to the EEA, its regulations and codes of good practice are proposed with the aim of ensuring that affirmative action measures in fact benefit those intended by the EEA.
Some projections are made to indicate the way forward for affirmative action in South Africa.Jurisprudence
LL.D.