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Sagna, Alphousseyni. "Etude et élaboration par Close-Spaced Vapor Transport (CSVT), d’absorbeurs Cu2ZnSnS4 en couches minces polycristallines destinées à la réalisation de photopiles à faible coût." Thesis, Perpignan, 2016. http://www.theses.fr/2016PERP0035/document.
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Le kësterite Cu 2 ZnSnS 4 (CZTS) est un semi-conducteur de type p composé d'éléments abondants et non toxiques. Ces atouts, en plus d’un gap direct, compris entre 1,45 et 1,5 eV, en font un excellent candidat pour remplacer les matériaux Cu(In,Ga)Se 2 et CdTe utilisés dans les photopiles en couches minces. Il a cependant été mis en évidence que les performances des photopiles utilisant CZTS comme absorbeur souffrent de la présence de phases secondaires dans les couches minces. Ainsi le travail présenté dans cette thèse décrit le dépôt de couches minces de CZTS par un procédé simple et à faible coût appelé Close SpacedVapor Transport(CSVT). Son objectif essentiel est de réaliser un composé CZTS dépourvu de toute phase secondaire en vue d’améliorer les rendements de conversion des cellules photovoltaïques à base de CZTS. Pour cela, le matériau massif a d’abord été synthétisé sous forme de lingot par le refroidissement lent et programmé d’un bain fondu obtenu à partir d'éléments purs. Les caractérisations réalisées sur le massif montrent qu’il s’agit d’un composé monophasé Cu 2 ZnSnS 4 , de composition quasi-stœchiométrique, dans la structure kësterite. Le lingot broyé et mis sous forme de pastille, est utilisé par la suite comme source à évaporer dans un réacteurCSVT utilisant de l’iode comme agent de transport, pour la formation de couches minces CZTS. L'optimisation des paramètres clés de dépôt des couches minces que sont la température du substrat et la pression d'iode a été effectuée. Les résultats d'analyses menées sur les couches de CZTS déposées à des températures de substrat comprises entre 460 à 500 °C, sous des pressions d'iode de 2 Kpa à 4 kPa, ont révélés d’excellentes propriétés physico-chimiquesThe kësterite Cu 2 ZnSnS 4 (CZTS) is a p-type semiconductor material made from abundant and nontoxic chemical elements. These advantages in addition to a direct band gap, with energy between 1.45eV and 1.5 eV, make it an excellent candidate for replacement of Cu(In, Ga)Se 2 and CdTe absorber layers currently used in thin film solar cells. It has although been highlighted that photovoltaic devices based on thin CZTS absorber layers are highly suffering from the presence of secondary phases in the thin films. So the work presented in this thesis describes thin CZTS layers deposition by a simple and low-cost process called Close Spaced Vapor Transport (CSVT). Its main objective is to realize a CZTS compound free of any secondary phase with the aim of improving conversion efficiencies of CZTS thin films based photovoltaic solar cells. For this purpose, the bulk CZTS material was first synthesized in the form of ingot by a slow cooling of a molten stoichiometric mixture of pure elements. Characterizations realized on this bulk material showed that it relates to a single phase, quasi-stoichiometric Cu 2 ZnSnS 4 compound in the kësterite structure. The ingot was milled into powders and pressed to give 1 mm thick pellets. These pellets were therefore used as evaporating sources in a CSVT reactor with iodine as transport agent, for the thin CZTS layers deposition. Optimizations of the key deposition parameters that are substrate temperature and iodine pressure were performed. The Results of the investigations conducted on the CZTS layersdeposited at substrate temperature in the range 460 °C-500 °C, under iodine pressure in the order of 2 kPa to 4 kPa, revealed excellent physico-chemical properties
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Moussaed, Elie. "Croissance et études physiques des couches de Bi2Te2. 5Se0. 5 : optimisation des conditions de croissance." Montpellier 2, 2009. http://www.theses.fr/2009MON20134.
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Ce travail de thèse porte sur l'optimisation des paramètres de croissance des couches minces de matériau thermoélectrique Bi2(Te1-ySey)3. En premier lieu, une mise au point bibliographique sur les différentes propriétés physiques des composés Bi2Te3 et Bi2Se3 a été compilée. En deuxième lieu un modèle théorique de la conductivité thermique basé sur l'équation de Boltzmann et le temps de relaxation dans le cas du Bi2Te3 a été établi. Enfin, après la présentation d'une approche thermodynamique de l'évaporation et de la condensation du composé Bi2Te2. 5Se0. 5, des couches minces à base de Bi2Te3-Bi2Se3 ont été fabriquées par différentes techniques de dépôt ; Dépôt chimique en phase vapeur à courte distance (CSVT) et Dépôt par sublimation à courte distance (CSS). Les analyses structurales, morphologiques et optiques ont permis de maîtriser la fabrication et la composition de ces matériaux et d'investir les conditions optimales pour des dépôts de bonne qualitéThis PhD work is dedicated to the optimization of the growth parameters of Bi2(Te1-ySey)3 thin films, which is a promising thermoelectric material. First, we give a general bibliographic overview about the different physical properties of the Bi2Te3 and Bi2Se3 components. Secondly, we establish a theoretical model for the thermal conductivity based on the Boltzmann equation and the relaxation time of the phonon in Bi2Te3. Finally, after presenting a thermodynamical approach describing the evaporation and condensation of the Bi2Te2. 5Se0. 5 component, several Bi2Te3-Bi2Se3 based thin films have been fabricated with different techniques; Closed-Space Vapor Tansport (CSVT) and Close Space Sublimation (CSS). The structural, morphological, and optical analysis permitted the fabrication and controlling the composition of the materials investigated. Furthermore, they allowed the investigation of the optimum conditions for the deposition of high crystalline quality thin films
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Reinholdsson, Madeleine. "CSV i den textila värdekedjan." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-10248.
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Rådande världsförhållanden riktar ökat fokus på frågor om hållbarhet. Den textila värdekedjans globala utspridning anstränger världens sociala som miljömässiga förhållanden. Därmed blir det allt viktigare för organisationer att engagera sig i ett arbete för att minimera effekterna av dess verksamhet. Företagens ansvarstagande- hållbarhetsaktiviteter benämns vanligen under Corporate Social Responsibility (CSR), begreppet är väletablerat och kritik av detta har givit upphov till nya benämningar. Creating Shared Value (CSV) är ett begrepp som fokuserar på att identifiera, utveckla och expandera kopplingen mellan ekonomisk och samhällelig tillväxt för att skapa simultant värde för likväl samhället som företagen. Syftet med denna studie var att, genom en fallstudie av ett svenskt modeföretag med utvecklat hållbarhetsarbete, undersöka de hållbarhetsaktiviteter som genomförs inom en textil värdekedjan ur ett CSV-perspektiv. Genom en kvalitativ forskningsdesign med deduktiv ansats studerades företaget och dess värdekedja i avsikt att besvara studiens frågeställning och uppnå dess syfte. Studiens empiriska material samlades in via semistrukturerade intervjuer med individer som representerade fallföretagets olika funktioner i värdekedjan. Materialet förklarades och tolkades utifrån det teoretiska ramverk som presenterats. Empirin och analysen visade att de genomförda aktiviteterna även kunde tolkas ur ett CSV-perspektiv under förutsättning att företagets tilläts tillämpa ett långsiktigt förhållningssätt och en identifiering av det delade värdet. Slutsatsen som drogs är att de undersökta hållbarhetsaktiviteterna genererar simultant värde för företag och samhället de verkar i. Aktiviteternas utfall och grad av värde varierade då vissa aktiviteter genererade ett direkt värde med påtagligt resultat för endera miljön eller samarbetspartners som på lång sikt skulle generera värde i konkurrensfördelar för fallföretaget medan andra hade en mer direkt effekt för båda inblandade parter. Generaliserbarheten av studiens resultat är begränsat på grund av den valda fallstudiemetoden men resultaten av denna studie anses likväl vara en intressant kontribution till forskningsdiskussionen om hållbarhetsaktiviteter.
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Yamada, Atsushi. "Work-conserving WRR-CSVP resource allocation in ATM networks." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq22251.pdf.
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Harrysson, Frida. "Simulation as a means of providing input to the CSMT." Thesis, Uppsala University, Department of Information Technology, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-125668.
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The Collaborative Synchronization Management Tool (CSMT) is an analysis tool that enables morphological and statistical analysis of plans. Input to the CSMT consists of a Cross Impact Matrix (CIM) where the relationships between the different activities of a plan are reflected as its values. This thesis proposes Modeling and Simulation as an alternative method of generating the CIM-values. The usage of this method will hopefully increase traceability and limit subjectivity, and it will also be less time-consuming. Determining the level of detail of the models was shown to be a challenge, as well as finding a suitable case scenario to validate the generation method more thoroughly. The results have provided positive indicators to the usefulness of the generation method of input to the CSMT but the evaluation remains somewhat inconclusive.
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Yang, Hang. "CSET model for optimizing make-to-order supply chain formation." Thesis, University of Macau, 2009. http://umaclib3.umac.mo/record=b2100827.
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Jannah, Najlaa. "ECG analysis and classification using CSVM, MSVM and SIMCA classifiers." Thesis, University of Reading, 2017. http://centaur.reading.ac.uk/78068/.
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Reliable ECG classification can potentially lead to better detection methods and increase accurate diagnosis of arrhythmia, thus improving quality of care. This thesis investigated the use of two novel classification algorithms: CSVM and SIMCA, and assessed their performance in classifying ECG beats. The project aimed to introduce a new way to interactively support patient care in and out of the hospital and develop new classification algorithms for arrhythmia detection and diagnosis. Wave (P-QRS-T) detection was performed using the WFDB Software Package and multiresolution wavelets. Fourier and PCs were selected as time-frequency features in the ECG signal; these provided the input to the classifiers in the form of DFT and PCA coefficients. ECG beat classification was performed using binary SVM. MSVM, CSVM, and SIMCA; these were subsequently used for simultaneously classifying either four or six types of cardiac conditions. Binary SVM classification with 100% accuracy was achieved when applied on feature-reduced ECG signals from well-established databases using PCA. The CSVM algorithm and MSVM were used to classify four ECG beat types: NORMAL, PVC, APC, and FUSION or PFUS; these were from the MIT-BIH arrhythmia database (precordial lead group and limb lead II). Different numbers of Fourier coefficients were considered in order to identify the optimal number of features to be presented to the classifier. SMO was used to compute hyper-plane parameters and threshold values for both MSVM and CSVM during the classifier training phase. The best classification accuracy was achieved using fifty Fourier coefficients. With the new CSVM classifier framework, accuracies of 99%, 100%, 98%, and 99% were obtained using datasets from one, two, three, and four precordial leads, respectively. In addition, using CSVM it was possible to successfully classify four types of ECG beat signals extracted from limb lead simultaneously with 97% accuracy, a significant improvement on the 83% accuracy achieved using the MSVM classification model. In addition, further analysis of the following four beat types was made: NORMAL, PVC, SVPB, and FUSION. These signals were obtained from the European ST-T Database. Accuracies between 86% and 94% were obtained for MSVM and CSVM classification, respectively, using 100 Fourier coefficients for reconstructing individual ECG beats. Further analysis presented an effective ECG arrhythmia classification scheme consisting of PCA as a feature reduction method and a SIMCA classifier to differentiate between either four or six different types of arrhythmia. In separate studies, six and four types of beats (including NORMAL, PVC, APC, RBBB, LBBB, and FUSION beats) with time domain features were extracted from the MIT-BIH arrhythmia database and the St Petersburg INCART 12-lead Arrhythmia Database (incartdb) respectively. Between 10 and 30 PCs, coefficients were selected for reconstructing individual ECG beats in the feature selection phase. The average classification accuracy of the proposed scheme was 98.61% and 97.78 % using the limb lead and precordial lead datasets, respectively. In addition, using MSVM and SIMCA classifiers with four ECG beat types achieved an average classification accuracy of 76.83% and 98.33% respectively. The effectiveness of the proposed algorithms was finally confirmed by successfully classifying both the six beat and four beat types of signal respectively with a high accuracy ratio.
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Fransson, Albin, and der Brug Peter van. "Systematic optimisation of an existing fuel oil preheating system : Facilitating replacement of 5000 cSt oil with 74 500 cSt." Thesis, Linnéuniversitetet, Institutionen för maskinteknik (MT), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-96033.
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In order to increase the efficiency of a preheating system as temperatures increase, without using seawater as a coolant, an additional heat exchanger is required to be installed into the system. The purpose of the study is therefore to investigate how the temperatures of fuel oils can be increased while minimising the loss of energy and costs. The study was conducted in Karlshamn Power Station's (kvt) preheating system on Block 3. The study was conducted via Design for six sigma (DFSS) according to the primary design concept SG2 to guarantee the study's understanding of empirical data, and the development of solutions. The study resulted in two variants of heat exchangers where one is an identical Shell and Tube heat exchanger from Siljan Allards AB and the other one is a Supermax Shell and Plate heat exchanger from Tranter International.
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Wu, Tianyu. "Design and analysis of wireless communication systems with limited CSIT feedback /." View abstract or full-text, 2009. http://library.ust.hk/cgi/db/thesis.pl?ECED%202009%20WUT.
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Hao, Chenxi. "Novel transmission strategies for MIMO networks with imperfect and delayed CSIT." Thesis, Imperial College London, 2016. http://hdl.handle.net/10044/1/45658.
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Channel state information at the transmitters (CSIT) is crucial to the downlink multi-user transmissions. However, acquiring accurate and instantaneous CSIT is challenging in practical systems, due to the channel estimation error, channel quantization error, and the latency incurred in the feedback link and backhaul link. Performing techniques designed for perfect CSIT using imperfect CSIT or delayed CSIT leads to a dramatically degraded performance due to the undesirable multi-user interference. Interestingly, recent information theoretic and communication works have departed from this path by employing novel multi-user transmission strategies, Rate-Splitting (RS) and Retrospective Interference Alignment (RIA), to deal with the imperfect CSIT and the delayed CSIT, respectively. Reminiscent to the pioneering work of Han-Kobayashi scheme, RS is employed to deal with the multi-user interference caused by imperfect CSIT by splitting each user's message into a common part and a private part. Each user not only decodes its desired private message, but also decodes the common messages of both users. In this thesis, we study a set of fundamental problems that are essential to RS, with particular interests in transmission block design for various scenarios and the achievable sum rate performance with the presence of quantized CSIT. Our main results are summarized as follows. Firstly, we characterize the achievable DoF region by RS in the $K$-user MISO broadcast channel (BC) and show that the maximal sum DoF is achievable with an even power allocation for the private messages. In the MISO BC with time-varying CSIT qualities, we propose a Space-Time RS (RS-ST) by multicasting common messages via a space-time design. This strategy exploits the time-varying CSIT qualities and yields a greater sum DoF than that achieved by performing RS in each individual time slot. Moreover, focusing on a two-user scenario, we study the sum rate performance of RS and RS-ST schemes with the presence of quantized CSIT, by upper-bounding their sum rate loss relative to ZFBF with perfect CSIT. Using these upper-bounds, we show that, to maintain a constant sum rate loss, RS scheme enables a feedback overhead reduction over conventional ZFBF with quantized CSIT, and RS-ST offers a further overhead reduction over RS in the scenario with alternating feedback qualities. Besides, simulation results show that both RS and RS-ST schemes offer a significant SNR gain over conventional single-user/multiuser mode switching when the number of quantization (feedback) bits is fixed. Secondly, in the MISO interference channel (IC), we investigate the achievable DoF region by RS. More importantly, we propose a novel scheme, so called Topological RS (TRS), where each user's message is split into a private part and multiple common parts. With a ZF-precoder and a properly assigned power according to the CSIT qualities of the interference links, each common message is to be decoded by a group of users rather than all users. This feature reduces the number of common messages decoded by each user, and thus yielding a greater DoF region than RS. The maximal sum DoF achieved by TRS is derived using graph theory methodology, fractional packing of a hypergraph. We show that TRS is applicable to the homogeneous cellular deployment where each user is only connected with three dominant transmitters, and derive the sufficient condition that TRS strictly outperforms conventional ZFBF. Thirdly, in the two-user MIMO BC with asymmetric antenna configuration (and with CSIT quality not varying over time), we show that the RS transmission block should be designed to fully exploit the spatial dimension at the user with a larger number of antennas. We also find that the sum DoF is maximized with a Space-Time transmission and unequal power allocation for the private messages. In the two-user MIMO IC, we design the RS transmission block motivated by a row transformation to the channel matrices. Such an operation allows us to identify the signal space where the transmitted signals interfere with each other, so as to derive a proper power allocation policy. The achievable DoF regions are shown to be optimal for some antenna configurations. The philosophy of RIA is to employ the delayed CSIT to obtain information about the multi-user interference generated in the previous slots, and thereby create future transmissions to perform interference management. In this thesis, focusing a $K$-user MIMO IC where the number of antennas at each transmitter is greater than the number of antennas at each user, we propose two RIA schemes based on distributed overheard interference retransmission using the perfect delayed CSIT. The first scheme generalizes the scheme designed for the MISO BC by exploiting the multiple antennas at the user side. The second scheme generalizes the redundancy transmission and partial interference nulling designed for the SISO IC, by exploiting the multiple antennas at the transmitter side. With an optimal transmitter-user scheduling, these two schemes jointly yield the best known sum DoF performance so far. In the $K$-user MISO IC, the achieved sum DoF is asymptotically given by $\frac{64}?$ when $K{\to}\infty$.
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Olovsson, Malin, and Liliane Khalil. "Reverse Logistics Study at Volvo CE CST Europe." Thesis, Mälardalen University, Department of Innovation, Design and Product Development, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-639.
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Assignment:
The mission of the assignment is to map the four return flows with respect to returning volume, weight, frequency, pick up- and delivery points. Today Volvo CE has a lack of information that concerns their own Reverse logistic processes. It is hard for Volvo CE to see where changes need to be done, due to limited reliable sources.
Purpose:
The purpose with the study is to make the return flows easier, less expansive and more manageable for both Volvo and their dealers. Further, environmental issues have to be considered in order to find improvements of the returning routines. The analysis is done to bring forth a proposal that will contribute to less unnecessary transports and that also will make it possible to reduce cost.
Result:
A couple of improvement areas have been discovered, some of them are radical while others are incremental. The one thing they have in common is to make sure that the return flows are being handled and seen as one common flow rather then separately treated. Among the improvements these are some recommendations to Volvo CE:
- Appoint special delivery point for warranty returns and make sure that the warranty routines are followed so that unnecessary transports can be reduced. - Store less cores for remanufacturing at the Core Hub. Cores that are not needed are not necessary to transport to the Core Hub. - Make better cost registrations and cost follow ups and evaluate customer satisfaction to be able to find improvement areas in the future.
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Dai, Mingbo. "Novel transmission and beamforming strategies for multiuser MIMO with various CSIT types." Thesis, Imperial College London, 2016. http://hdl.handle.net/10044/1/55277.
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In multiuser multi-antenna wireless systems, the transmission and beamforming strategies that achieve the sum rate capacity depend critically on the acquisition of perfect Channel State Information at the Transmitter (CSIT). Accordingly, a high-rate low-latency feedback link between the receiver and the transmitter is required to keep the latter accurately and instantaneously informed about the CSI. In realistic wireless systems, however, only imperfect CSIT is achievable due to pilot contamination, estimation error, limited feedback and delay, etc. As an intermediate solution, this thesis investigates novel transmission strategies suitable for various imperfect CSIT scenarios and the associated beamforming techniques to optimise the rate performance. First, we consider a two-user Multiple-Input-Single-Output (MISO) Broadcast Channel (BC) under statistical and delayed CSIT. We mainly focus on linear beamforming and power allocation designs for ergodic sum rate maximisation. The proposed designs enable higher sum rate than the conventional designs. Interestingly, we propose a novel transmission framework which makes better use of statistical and delayed CSIT and smoothly bridges between statistical CSIT-based strategies and delayed CSIT-based strategies. Second, we consider a multiuser massive MIMO system under partial and statistical CSIT. In order to tackle multiuser interference incurred by partial CSIT, a Rate-Splitting (RS) transmission strategy has been proposed recently. We generalise the idea of RS into the large-scale array. By further exploiting statistical CSIT, we propose a novel framework Hierarchical-Rate-Splitting that is particularly suited to massive MIMO systems. Third, we consider a multiuser Millimetre Wave (mmWave) system with hybrid analog/digital precoding under statistical and quantised CSIT. We leverage statistical CSIT to design digital precoder for interference mitigation while all feedback overhead is reserved for precise analog beamforming. For very limited feedback and/or very sparse channels, the proposed precoding scheme yields higher sum rate than the conventional precoding schemes under a fixed total feedback constraint. Moreover, a RS transmission strategy is introduced to further tackle the multiuser interference, enabling remarkable saving in feedback overhead compared with conventional transmission strategies. Finally, we investigate the downlink hybrid precoding for physical layer multicasting with a limited number of RF chains. We propose a low complexity algorithm to compute the analog precoder that achieves near-optimal max-min performance. Moreover, we derive a simple condition under which the hybrid precoding driven by a limited number of RF chains incurs no loss of optimality with respect to the fully digital precoding case.
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Vorek, Jiří. "Knihovna stavebních prvků koaxiálního filtru pro CST Microwave Studio." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218608.
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This thesis deals with development of tool – macros which help to create coaxial cavity filters. It describes problematic design of complex structures at CST Studio Suite 2009. For this purpose macros supporting coarse and fine model to method Tuning – Space Mapping (TSM) was made. This means creating fine model at CST MWS and coarse model at CST DS.
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Wolanský, David. "Optimalizace koaxiálních filtrů metodou Tuning-Space Mapping v CST." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218609.
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This thesis deals with optimization of coaxial cavity filters. It thoroughly describes optimization method Tuning – Space Mapping (TSM) in CST Studio. It focuses on the explanation of the fine and the coarse model and their mutual link. The whole algorithm is illustrated and tested on the third-order coaxial cavity filter working in the band of 880 – 960MHz. In order to check the function of TSM, the algorithm is applied on fourth-order filter, triplet filter and quadruplet filter. Another part of the thesis focuses on the automatization of the whole optimization procedure. Macros for automatic determination of calibration constants and automatic calibration process between the coarse and the fine model are proposed and programmed in CST. The complete optimization procedure is applied on optimization of seventh-order filter with two cross couplings.
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Cove, J. E. "Effectiveness of weekly Cognitive Stimulation Therapy (CST) for people with dementia and the additional impact of enhancing CST with a carer training programme." Thesis, University College London (University of London), 2013. http://discovery.ucl.ac.uk/1408023/.
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This thesis focuses on interventions for people with dementia and their carers. Part 1 of the thesis is a literature review examining the effectiveness of combined intervention programmes for people with dementia and their carers. A previous review examined literature published before 2005 and current review sought to update this review. The 18 papers retrieved from the review are presented according to the type of intervention they describe. The effectiveness of each type intervention was discussed followed by a consideration of the effectiveness of interventions for people with dementia and their carers according to different outcomes. Part 2 is an empirical study using a randomized controlled trial to assess the effectiveness of weekly Cognitive Stimulation Therapy (CST) and the additional effects of enhancing CST with a carer training program. Quantitative outcomes for people with dementia are reported. This paper forms part of a joint research study conducted with Jacobi (2013; Counselling Doctorate Trainee, City University) who will report quantitative outcomes for carers and evaluate the carer training program using a qualitative approach. Part 3 is a critical appraisal and discusses the factors that should be taken into account when interpreting non-significant research findings. A discussion of the ethical obligations of publishing non-significant research findings is also presented. Finally, the quality of the research study described in Part 2 is assessed. Consideration is given to the strengths and weaknesses of the research and a quality rating, using a formal assessment scale, is undertaken.
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Rassouli, Borzoo. "Information theoretic limits of MIMO wireless networks with bounded input and imperfect CSIT." Thesis, Imperial College London, 2016. http://hdl.handle.net/10044/1/39310.
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In this thesis, we investigate some information theoretic limits of two specific types of MIMO wireless networks. In the first one, the effect of channel uncertainty at the transmitter (due to estimation error, feedback latency, and so on) in MIMO broadcast channels is investigated. In this setting, we capture this imperfectness in the bounds for the DoF region of the channel. The second one is the point to point deterministic MIMO channel with input amplitude constraint. For certain settings, the capacity of this channel is derived, while for the general problem, upper and lower bounds for the capacity are obtained.
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Melo, Paulo César Ferreira. "CSVM: uma plataforma para crowdSensing móvel dirigida por modelos em tempo de execução." Universidade Federal de Goiás, 2014. http://repositorio.bc.ufg.br/tede/handle/tede/4766.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES
Recent advances in ubiquitous computing have contributed to the rise of an emerging category of mobile devices that have computational and sensing capabilities, such as smartphones and wearable devices. The widespread use of these devices connected by communication networks contribute to the evolution of the Internet of Things. The presence of these mobile devices increases the chance for the development of applications using the sensing ability of these devices to measure, and understand the environmental indicators. Furthemore, data sensed by these applications can be shared among different mobile devices, giving rise to a paradigm called mobile crowdsensing. The complexity of applications in this domain is associated with factors such as interoperability between different mobile devices, data identification and capture from these devices, and adaptation of their use in heterogeneous and dynamic environments. Software engineering approaches such as Model-Driven Engineering (MDE) and, more specifically, models at runtime are an effective way of dealing with this complexity. We propose the use of an approach based on models at runtime for creating and processing mobile crowdsensing queries.We show how this approach can be used by defining a domain-specific modeling language for the mobile crowdsensing domain, called CSML. We built and validated the CSML metamodel which captures the main aspects of the domain, and its execution environment, which consists of an execution engine for models described in CSML, called CSVM. This approach facilitates the specification of mobile crowdsensing queries, also enabling their dynamic change during their processing.
Recentes avanços na computação ubíqua colaboraram para a ascensão de uma categoria emergente de dispositivos móveis que apresentam capacidades computacionais e de sensoriamento, tais como smartphones e dispositivos vestíveis. A proliferação desses dispositivos e sua conexão por meio de redes de comunicação contribui para a evolução da Internet das Coisas. A presença desses dispositivos móveis aumenta a oportunidade para o desenvolvimento de aplicações que utilizam sua capacidade de sensoriamento a fim de medir, inferir e entender os indicadores do ambiente. Por sua vez, os dados sensoriados por essas aplicações podem ser compartilhados entre diferentes dispositivos móveis, dando origem ao paradigma denominado CrowdSensing móvel. A complexidade de aplicações pertencentes ao domínio de CrowdSensing móvel está associada a fatores como interoperabilidade entre diferentes dispositivos móveis, identificação e captação de dados provenientes desses dispositivos e adaptação de seu uso em ambientes heterogêneos e dinâmicos. Abordagens baseadas na Engenharia Dirigida por Modelos (MDE), como modelos em tempo de execução constituem uma forma de lidar com complexidade desse domínio de aplicações. Neste trabalho propomos o uso de uma abordagem dirigida por modelos em tempo de execução para criação e processamento de consultas de crowdsensing móvel que são um importante elemento de aplicações de crowdsensing. Mostramos como essa abordagem pode ser empregada por meio da definição de uma linguagem de modelagem específica para o domínio de crowdsensing móvel, denominada CSML. Neste sentido, construímos e validamos o metamodelo da CSML, que captura os principais aspectos do domínio e seu ambiente de execução, que consiste em uma máquina de execução de modelos descritos em CSML, denominada CSVM . Essa abordagem dirigida por modelos facilita a especificação de consultas de crowdsensing móvel, além de possibilitar a alteração dinâmica dessas consultas durante seu processamento.
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He, Chao. "Radiodiffusion avec CSIT retardée : analyse de SNR fini et voie de retour hétérogène." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLC091/document.
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Cette thèse explore, sous certains paramètres réalistes, l’une des techniques clés pour les réseaux sans fil de demain, i.e., la réduction des interférences permis par la voie de retour (feedback). Nous nous concentrons sur la voie de retour du type d’état, également connu sous le nom de CSIT retardé, qui aide les récepteurs à profiter des observations indésirables par créer des dimensions de signaux supplémentaires. Afin de vérifier l’utilité de la CSIT retardé dans des situations sévères, nous l’étudions avec SNR fini et / ou avec la hétérogénéité de la voie de retour dans une configuration de communication de diffusion, qui est largement utilisé pour modéliser la transmission de liaison descendante dans les systèmes cellulaires. Tout au long de la thèse, nous utilisons des outils de théorie information, par exemple, le codage lossy distribué, bloc Markov codage, la technique de compression (Wyner-Ziv), etc.Dans la première partie de cette thèse, nous sommes surtout intéressés par la performance de CSIT retardée avec SNR fini et l’uniformité à travers les résultats dans le canal Gaussien et dans le canal d’effacement. Plusieurs schémas relativement simples sont proposés pour des canaux de diffusion multiutilisateur (sans mémoire) dans le cas où les états sont supposés être entièrement connus à la destination, mais causalement à l’émetteur. Lors de l’analyse des régions correspondantes les cas Gaussien/ d’effacement, nous avons caractérisé des améliorations en termes de débits symétriques plus élevés et plus d’options de l’alphabet d’entré.Dans la deuxième partie de cette thèse, les algorithmes adaptés aux hétérogénéités différentes de la voie de retour sont ciblés, c’est-à-dire, seulement une partie des nœuds de communication sont impliqués dans le processus de feedback. En particulier, nous nous concentrons sur le canal de 1) diffusion supporté par les voies de retour des récepteurs partiels, 2) diffusion avec relais et voie de retour au relais. Étant donné que (tous /partiel) états retardés sont accessibles à des émetteurs (tous/partiels), les approches proposées, bien qu’ils emploient les méthodes de codages visant à réduire les interférences à tous les récepteurs, doivent soit donner la priorité aux utilisateurs qui fournissent les états et compter sur un gain de codage opportuniste pour les autres, soit forcer chaque source à prendre la responsabilité partielle de transmission. Les améliorations sur les débits réalisables sont justifiées dans des cas avec analyse et quelques exemples. Les résultats et les évaluations de cette thèse, qui donnent quelques indications sur comment le retour d’état peut être exploité dans la transmission de liaison descendante, montrent qu’une bonne performance de débit pourrait être atteinte avec le CSIT retardé même lorsque la puissance de transmission est limitée et lorsque le retour d’état est disponible de façon hétérogèneThis dissertation explores one of the key techniques for future wireless networks, namely feedback enabled interference mitigation, under some realistic settings. We focus on the state-type feedback, also known as delayed CSIT, which helps leverage receivers’ overheard observations to create extra signal dimensions. In order to verify the usefulness of delayed CSIT in harsh situations, we investigate it with finite SNR and/or feedback heterogeneity in a broadcast communication setup, which is widely utilized to model downlink transmission in cellular systems. Throughout the thesis, we use some information theoretical tools, e.g., distributed lossy source coding, block Markov coding, Wyner-Ziv compression technique, e.t.c.In the first part of this dissertation, we are mainly interested in the finite SNR performance of delayed CSIT and the uniformity across the results in the Gaussian broadcast channel and in the erasure channel. Several relatively simple schemes are proposed in multi-user memoryless broadcast channels when states are assumed to be fully known at the destinations but only strictly causally at the transmitter. Enhancements in terms of higher symmetric rates and more input alphabet options are then characterized when analyzing the corresponding regions in Gaussian/erasure cases.In the second part of this dissertation, algorithms adapted to distinct feedback heterogeneities are targeted as only part of the communication nodes are involved in the feedback process. In particular, we concentrate on 1) broadcast channel with feedback from part of all receivers; and 2) broadcast relay channel with feedback at the relay. Given that (partial) delayed states are accessible at (partial) transmitters, the proposed approaches, though employ coding methods aiming at mitigating interference at all receivers, have to either give priority to the users who feedback and rely on opportunistic coding gain for the others or force each source to take limited responsibility in the transmission. Improvements on achievable rates are justified in either cases with analysis and some examples.The results and their evaluations in this thesis, which give some insights on how to exploit the state feedback in downlink transmission, show that good rate performance can be achieved with delayed CSIT even when transmission power is limited and when the state feedback is heterogeneous
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Ordulu, Nizameddin (Nizameddin H. ). "A file system for accessing MySQL tables as CSV files." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/62664.
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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2010.Cataloged from PDF version of thesis.
Includes bibliographical references (p. 49-50).
In this thesis, we describe the design and implementation of a userspace file system that represents MySQL tables as comma-separated values (CSV) files. The users can access and modify the data through both the file system and MySQL's query interface. In order to transform read and write operations to SQL queries, we maintain a reverse index from file offsets to line numbers. Changes to the database outside of the file system are reflected on the file system by means of MySQL's master-slave replication feature. We evaluate our system by comparing its performance to a regular file system's performance using popular command line tools(grep, sed, awk) and user applications (OpenOffice.org spreadsheets). The choice of the database for this system was MySQL because of its popularity and the availability of its source code, however, the same ideas can be applied to any relational database with replication to create a similar system.
by Nizameddin Ordulu.
M.Eng.
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Akundwe, Regis, and Vernesa Salahagic. "CSR and CSV: The Managerial Interpretation of a Blurry Line." Thesis, Uppsala universitet, Företagsekonomiska institutionen, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-354906.
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From the moment the concept of Creating Shared Value (CSV) was introduced in 2011, it was by some considered to be an evolutionary way of contributing to society whereas for others it initiated an ongoing critical debate. This debate that is taking place on the academic scene has, among other things, focused on defining what CSV really is and differentiating it from Corporate Social Responsibility (CSR). This is mainly because the critical side believes that CSV is unoriginal and strikingly similar to CSR. Interestingly, in practice companies are implementing CSV in many different ways and some are adding it to their CSR strategy. The fact that these two concepts are closely related has led to a blurry line, which in return has caused disagreements in the mentioned debate. Given the above, we aim at understanding how managers interpret and implement CSV in comparison to CSR and what the differences between these two concepts are in practice. Data was collected by employing case studies which entailed semi-structured interviews with company informants. The findings indicated that managers interpret CSV as a way of contributing to society as well as the firm’s business simultaneously, and thus the implementation of the concept is highly industry-specific. CSR on the other hand, was mostly interpreted as a way of conforming to external pressures and is therefore implemented in relatively similar ways across the companies interviewed. In contrast to academia, it was indicated that managers are more interested in infusing the above two concepts than separating and differentiating them.
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Bhattacharjee, Anukana M. S. "Characterization of the DNA Binding Properties of CST (CTC1-STN1-TEN1) And Their Importance for CST Function in Telomeric as well as Genome-wide Replication." University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1504781845245038.
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Verdura, Edgard. "Familial Cerebral Small Vessel Diseases of unknown etiology : a high throughput approach towards a better understanding of pathophysiological mechanisms." Thesis, Sorbonne Paris Cité, 2016. http://www.theses.fr/2016USPCC264.
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Les maladies des petites artères cérébrales sont un groupe hétérogène de maladies qui affectent les petites artères, artérioles, veines et/ou capillaires du cerveau. La plupart des patients sont des cas sporadiques, mais plusieurs formes héréditaires ont été identifiées.Toutefois, 15 % seulement des patients atteints d’une cSVD familiale sont porteurs d’une mutation dans l’un de ces gènes, suggérant l’implication d’autres gènes. Dans cette thèse, nous avons montré que des mutations hétérozygotes du gène HTRA1 étaient responsables d’environ 5 % des cSVD familiales. L’analyse fonctionnelle de ces mutations a montré un effet perte de fonction. L’âge de début chez les sujets hétérozygotes était beaucoup plus tardif que chez les patients CARASIL, où les deux allèles d’HTRA1 sont mutés. Ensuite, nous avons identifié 2 familles (incluant la famille rapportée sous l’acronyme PADMAL / Pontine Autosomal Dominant Microangiopathy and Leukoencephalopathy) portant deux mutations distinctes dans un site d’accrochage du microRNA miR-29, dans la partie 3’UTR du gène COL4A1.Quatre autres patients index porteurs du même type de mutations ont été identifiés dans notre cohorte de cas cSVD. L’analyse fonctionnelle de ces mutations a mis en évidence une up-régulation de l’expression du gène COL4A1. Le phénotype observé était très stéréotypé, caractérisé par la survenue d’infarctus pontiques dans la 3ème décade. L’identification des bases moléculaires de ces deux nouvelles formes de cSVD héréditaire a des applications diagnostiques immédiates. Elle renforce par ailleurs l’hypothèse du rôle essentiel d’une altération du matrisome dans les mécanismes physiopathologiques des cSVDCerebral small vessel diseases (cSVD) are a heterogeneous group of disorders affecting small arteries, arterioles, veins, and/or capillaries of the brain. In most cases cSVD are sporadic, but several hereditary monogenic forms have been identified. Nevertheless, only 15% of familial cSVD patients sent for genetic screening are carriers of mutations in one of these genes, suggesting the implication of other genes. In this thesis work, we showed that heterozygous mutations in HTRA1 are found in 5% of familial cSVD cases. Functional analysis of these mutations showed that most of them behave as loss-of-function mutations. Disease onset was much later (>25 years) than in CARASIL patients, in which both2 HTRA1 alleles are mutated. Afterwards, we identified 2 informative families (including the original family reported to be affected by PADMAL / Pontine Autosomal Dominant Microangiopathy and Leukoencephalopathy) harboring two different mutations in the binding site of miR-29 microRNA within the 3’UTR of COL4A1 gene. Four other index patients carrying the same type of mutations were identified in our patient cohort. Functional analysis of these mutations showed an up-regulation of COL4A1 gene expression. The observed phenotype was highly stereotyped in all patients, characterized by pontine infarcts appearing in the 3rd decade. Identification of the molecular defects underlying these two novel hereditary cSVD forms provides tools to improve the molecular diagnosis of cSVD. Besides, it reinforces the hypothesis of an essential role of matrisome alteration in cSVD pathophysiological mechanisms
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Lindgren, Jonas. "Evaluation of CST Studio Suite for simulation of radar cross-section." Thesis, Umeå universitet, Institutionen för fysik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-187751.
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When designing military vehicles, it is of interest to make the vehicles difficult to detect using radar. The radar cross-section (RCS) property indicates how easily a vehicle is detected by radar and should thus be minimized. However, the RCS of a vehicle represents the cross-sectional area of a perfectly reflecting sphere that would produce the same reflection strength as the vehicle in question. Since this is extremely complicated to calculate as military vehicles are quite complex, these calculations are performed using computational simulations. BAE Systems Hägglunds is looking into changing from their current simulation software OPTISCAT to CST Studio Suite and thus want to know how CST performs and compares against OPTISCAT. In this work, we show that CST obtains results within 2% of theoretical data when simulating a sphere and a slab. When simulating vehicles, the RCS difference between the two software is from 3% to 55% while showing similar general behavior. Results indicate that CST performs well when simulating simple objects but deviates from OPTISCAT when simulating the vehicle. It is not surprising that the software does not match up perfectly since they use different theoretical approaches, OPTISCAT uses physical optics while CST an extension to physical optics called the Shooting Bouncing Ray method. Even though the software differs to this extent it is most likely possible that CST can be a suitable replacement for OPTISCAT. When looking at RCS the important part is the location of spikes and since they have similar general behavior, those spikes may still be possible to identify. This thesis will hopefully act as a starting point for further examination of CST as a software for simulating RCS, for example by comparing results from CST to experimentally measured data. Hopefully it will also be used to improve the design process of making military vehicles harder to detect.
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Jorge, Maria Lucía Del Rosario Castro. "Sumarização automática multidocumento: seleção de conteúdo com base no Modelo CST (Cross-document Structure Theory)." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/55/55134/tde-07062010-112156/.
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A sumarização automática multidocumento consiste em produzir um sumário ou resumo (como mais comumente é conhecido) a partir de um grupo de textos que versam sobre um mesmo assunto, contendo as informações mais relevantes de acordo com o interesse do usuário. No cenário atual, com a quantidade imensa de informação em constante crescimento e atualização, e o tempo cada vez mais reduzido disponível para apreender o conteúdo de interesse, sumários multidocumento têm se tornado um recurso importante. Nesta dissertação, foram explorados métodos de seleção de conteúdo para sumarização multidocumento com base no modelo de relacionamento multidocumento CST (Cross-document Structure Theory), proposto recentemente e já difundido na área de Processamento de Línguas Naturais. Em particular, neste trabalho, foram definidos e formalizados operadores de seleção de conteúdo para sumarização multidocumento com base no modelo CST. Estes operadores representam possíveis preferências de sumarização e focam-se no tratamento dos principais desafios presentes no processamento de múltiplos documentos: redundância, complementaridade e informações contraditórias. Estes operadores são especificados em templates contendo regras e funções que relacionam essas preferências às relações CST. Especificamente, foram definidos operadores para extrair a informação principal, apresentar informação de contexto, identificar autoria, tratar redundâncias e identificar informação contraditória. Também foi avaliado o impacto do uso do modelo CST em métodos de sumarização superficiais. Experimentos foram realizados com textos jornalísticos escritos em português brasileiro. Os resultados das avaliações mostram que o uso da teoria CST melhora a informatividade e a qualidade dos sumários geradosMultidocument summarization consists in producing a summary from a group of texts on a same topic, containing the most relevant information according to the users interest. Recently, with the huge amount of growing information over the internet and the short time available to learn and process the information of interest, automatic summaries have become a very important resource. In this work, we explored content selection methods for multidocument summarization based on CST (Cross-document Structure Theory) a recently proposed model and already investigated in the Computational Linguistics area. Particularly, in this work we defined and formalized content selection operators based on CST model. These operators represent possible summarization preferences and they focus on the treatment of the main challenges of multidocument summarization: redundancy, complementarity and contradiction among information. These operators are specified in templates containing rules and functions that relate the preferences to CST relations. Specifically, we define operators for extracting main information, context information, identifying authorship, treating redundancy and showing contradicted information. We also explored the impact of CST model over superficial summarization methods. Experiments were done using journalistic texts written in Brazilian Portuguese. Results show that the use of CST model helps to improve informativeness and quality in automatic summaries
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OLIVEIRA, Hugo Santos. "CSVValidation: uma ferramenta para validação de arquivos CSV a partir de metadados." Universidade Federal de Pernambuco, 2015. https://repositorio.ufpe.br/handle/123456789/18413.
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Dissertação Hugo Santos de Oliveira - Versão Depósito Bib Central.pdf: 2529045 bytes, checksum: a83fb438eaa8daaa0b4dcba01cb0b729 (MD5)Made available in DSpace on 2017-03-14T18:10:49Z (GMT). No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Dissertação Hugo Santos de Oliveira - Versão Depósito Bib Central.pdf: 2529045 bytes, checksum: a83fb438eaa8daaa0b4dcba01cb0b729 (MD5) Previous issue date: 2015-08-14
Modelos de dados tabulares têm sido amplamente utilizados para a publicação de dados na Web, devido a sua simplicidade de representação e facilidade de manipulação. Entretanto, nem sempre os dados são dispostos em arquivos tabulares de maneira adequada, o que pode causar dificuldades no momento do processamento dos dados. Dessa forma, o consórcio W3C tem trabalhado em uma proposta de especificação padrão para representação de dados em formatos tabulares. Neste contexto, este trabalho tem como objetivo geral propor uma solução para o problema de validação de arquivos de Dados Tabulares. Estes arquivos, são representados no formato CSV e descritos por metadados, os quais são representados em JSON e definidos de acordo com a especificação proposta pelo W3C. A principal contribuição deste trabalho foi a definição do processo de validação de arquivos de dados tabulares e dos algoritmos necessários para a execução desse processo, além da implementação de um protótipo que tem por objetivo realizar a validação dos dados tabulares, conforme especificado pelo W3C. Outra importante contribuição foi a realização de experimentos com fontes de dados disponíveis na Web, com o objetivo de avaliar a abordagem proposta neste trabalho.
Tabular data models have been used a lot for publishing data on the Web because of its simplicity of representation and easy manipulation. However, in some cases the data are not disposed in tabular files appropriately, which can cause data processing problems. Thus, the W3C proposed a standard specification for representing data in tabular format. In this context this work has as main objective to propose a solution to the problem of validating tabular data files, represented in CSV, files and described by metadata represented as JSON files and described, according to the specification proposed by the W3C. The main contribution of this work is the definition of a tabular data file validation process and algorithms necessary for the implementation of this process as well as the implementation of a prototype that aimed to validate tabular data as specified by the W3C. Other important contribution is the execution of experiments with data sources available on the Web with the objective to evaluate the approach proposed in this work.
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Boerkoel, Cornelius Franciscus III. "Modulation of CSV 5' and 3' LTR transcription in c-myc activation." Case Western Reserve University School of Graduate Studies / OhioLINK, 1991. http://rave.ohiolink.edu/etdc/view?acc_num=case1055269155.
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Quennerstedt, Fredrik, and Jonsson Mattias. "Nestlés CSV-koncept : En konsekvens av CSR eller av företagets kultur och kontext?" Thesis, Uppsala universitet, Företagsekonomiska institutionen, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-176932.
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Företags sociala ansvar och hållbarhetsarbete har under de senaste 50 åren debatterats inom företagsekonomin, en benämning som används är CSR, Corporate Social Responsibility. Som teoretiskt begrepp har det kritiserats för att sakna entydighet eller en klar definition och det har lett till att vad olika företag praktiskt implementerar kallas CSR fastän de aktiviteter som utförs kan vara av väldigt olika karaktär. Nyinstitutionell teori förklarar det med att specifika företag översätter teoretiska idéer inom sin egen kontext, och därav följer olikheterna. Ekonomerna Porter och Kramer myntade 2011 ett nytt begrepp kallat CSV, Creating Shared Value, med tanken att minska de problem som funnits inom CSR. CSV har till stor del baserats på företaget Nestlés arbete, dock har Nestlé själva inte kallat det för CSV tidigare. Syftet med uppsatsen är att undersöka om CSV kan beskrivas på ett motsvarande sätt som CSR i enlighet med nyinstitutionell teori och speciellt översättningsteori. Det visade sig vara möjligt, och Nestlés hållbarhetsarbete kan inom dess specifika företagskontext ses som en översättning av specifika företagsetiska idéer, vilket har mynnat ut i CSV.
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Shukla, Jainendra. "Empowering Cognitive Stimulation Therapy (CST) with Socially Assistive Robotics (SAR) and Emotion Recognition." Doctoral thesis, Universitat Rovira i Virgili, 2018. http://hdl.handle.net/10803/586279.
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Els sistemes assistits per robots per a la rehabilitació cognitiva poden augmentar l'abast dels beneficis potencials de les intervencions psicològiques o psicosocials basades en l'evidència per a persones amb una àmplia gamma de problemes de salut mental. Les investigacions existents a la socially assistive robots (SAR) manquen de validació clínica i, per tant, els metges tenen poca motivació per al seu ús en pràctiques clíniques. A mes, les interaccions entre humans i robots existents no tenen en compte l'estat emocional i la involucració actuals de l'usuari. Les intervencions de rehabilitació cognitiva per a persones amb problemes de salut mental requereixen una interacció complexa entre robots i humans, i la ubiqüitat dels dispositius portàtils, motiva l'ús de sistemes d'interacció amb robots capaços d'adquirir de forma autònoma informació sobre l'estat emocional de l'usuari, les intencions i el context circumdant perquè el robot pugui adaptar les interaccions en conseqüència.
En aquesta tesi, he descrit el disseny, la implementació de les activitats de rehabilitació cognitiva assistides per robot i el reconeixement d'emocions en temps real a partir de senyals d'electro-dermal activity (EDA). El disseny d'intervencions assistides per robot presenta un marc coherent per produir efectes positius tant als usuaris com als cuidadors. La implementació del sistema confirma una major involucració entre els usuaris i una reducció significativa en la càrrega dels cuidadors. El desenvolupament dels algorismes de reconeixement d'emocions ha demostrat que és possible processar els senyals EDA en temps real amb un retard mínim per inferir l'estat emocional de les persones amb discapacitat intel.lectual (DI).Los sistemas asistidos por robots para la rehabilitación cognitiva pueden aumentar el alcance de los posibles beneficios de las intervenciones psicológicas o psicosociales basadas en evidencia para las personas con una amplia gama de problemas de salud mental. Las investigaciones existentes sobre socially assistive robots (SAR) carecen de validación clínica y, por lo tanto, los médicos hallan poca motivación para su uso en las prácticas clínicas. Además, las interacciones existentes entre humanos y robots no tienen en cuenta el estado emocional y la involucración actuales del usuario. Las intervenciones de rehabilitación cognitiva para personas con problemas de salud mental exigen una compleja interacción entre robots y humanos, y la ubicuidad de dispositivos portátiles motiva el uso de sistemas de interacción con robots capaces de adquirir de forma autónoma información sobre el estado emocional, las intenciones y el contexto circundante del usuario para que el robot pueda adaptar las interacciones en consecuencia. En esta tesis, describí el diseño, la implementación de actividades de rehabilitación cognitiva asistidas por robot y el reconocimiento de emociones en tiempo real a partir de señales electro-dermal activity (EDA). El diseño de intervenciones asistidas por robot presenta un marco coherente para producir efectos positivos tanto en los usuarios como en los cuidadores. La implementación del sistema confirma una mayor involucración entre los usuarios y una reducción significativa en la carga de los cuidadores. El desarrollo de los algoritmos de reconocimiento de emociones ha demostrado que es posible procesar las señales EDA en tiempo real con un retraso mínimo para inferir el estado emocional de las personas con discapacidad intelectual (DI).
Robot-assisted systems for cognitive rehabilitation can increase the reach of potential benefits of evidence-based psychological or psychosocial interventions to the individuals with a wide range of mental health concerns. Existing researches in socially assistive robots (SAR) lack clinical validation and hence, medical practitioners have little motivation for their use in clinical practices. Besides, existing human-robot interactions are inattentive to the user’s current emotional state and engagement. Cognitive rehabilitation interventions for individuals with mental health concerns demand complex human robot interaction, and ubiquity of wearable devices motivates for robot interaction systems which can autonomously acquire information about the user’s emotional state, intentions and surrounding context so the robot can adapt its interactions accordingly. In this thesis, I have described the design, implementation of robot-assisted cognitive rehabilitation activities and real-time emotion recognition from electro-dermal activity (EDA) signals. Design of robot-assisted interventions presents a coherent framework to produce positive effects on both the users and the caregivers. The implementation of the system confirms an increased engagement among users and a significant reduction in caregivers burden. The development of the emotion recognition algorithms has shown that it is possible to process the EDA signals in real time with minimal lag to infer the emotional state of individuals with intellectual disability (ID).
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Sawalha, Ola. "Capillary Suction Time (CST) Test : developments in testing methodology and reliability of results." Thesis, University of Edinburgh, 2011. http://hdl.handle.net/1842/4887.
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The dewatering of wastewater sludge (slurry) is a routine operation at wastewater treatment plants, and the results of dewaterability tests underpin the selection of dewatering processes. The two most commonly applied dewaterability tests for this purpose are the capillary suction time (CST) test and the specific resistance to filtration (SRF) test. The aim of this research was to develop improved methods of estimating sludge dewaterability by modifying the components and procedures used in the standard CST test, and by exploring the causes of the high variability that confounds the interpretation of the CST test results. The applications of this research were to recommend alternative methodologies that would help to improve the accuracy and precision of the standard CST test device and procedures, and ideally reduce operational and consumable costs. Multi-factorial experiments were designed to test the capillary suction times and the specific resistances to filtration of natural sludges and also of a synthetic medium which was formulated to simulate the properties of natural sludges. The applicability of altering the funnel geometry of the CST device, and the use of several alternative types of filter paper was evaluated. The applicability of incorporating stirring activity to eliminate or a least reduce sedimentation, and of adding a sealant at the bottom of the funnel, to eliminate or at least minimize unwanted filtrate leakage between the edge of the funnel and the filter paper, were studied. Experiments were performed to analyze the effects of temperature on the properties of sludges and the results of CST tests. Improved methods of estimating sludge dewaterability were developed by modifying the components and procedures used in the standard CST test, and by exploring the causes of variability in the test results. Stable synthetic sludges were successfully formulated to simulate the properties of natural sludges for experimental purposes. A rectangular funnel significantly reduced the variability and the time taken to conduct the CST test, relative to a circular funnel, particularly when testing heavy sludges. Whatman 17 chr (the most commonly used anisotropic filter paper) did not produce the most consistent CST test results in the shortest time. It is recommended that isotropic filter papers could be used, to lower the cost, reduce the test time, and improve the test precision. The addition of a sealant to the CST test apparatus also reduced the variability in the test results. No significant effects were found when a stirrer was added to the apparatus. The best line of fit to estimate filterability was defined by loge Y = β0 + β1 √x where Y = the mean CST value (s); β0 = the intercept (the predicted mean CST (s) when the distance4 between electrodes of the CST device is zero); β1 = the filterability (s/m2); X = the distance4 (m) between the electrodes of the CST device. Non-linear relationships were found between the CST test times and the temperature, associated with a complexity of effects of the temperature on sludge viscosity, filterability, settleability, desorptivity, and flocculation behaviour. It is recommended that the temperature should be recorded and controlled during the conduction of CST tests. SRF test results were predicted from the results of CST tests by the empirical model loge SRF = 46.128 – 1.346 T + 0.035 T2 + 13.760 F/TSS where SRF is the specific resistance to filtration (m/kg); T is the temperature (ºC); F is the filterability (loge s/m2) and TSS is the total suspended solids concentration (g/l).
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Silva, Antônio Carlos Ramos e. "Competência e terceirização : um estudo de caso na área de manutenção da CST." reponame:Repositório Institucional do FGV, 2003. http://hdl.handle.net/10438/3652.
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Previous issue date: 2003Esse trabalho analisa como a competência dos trabalhadores de manutenção pode afetar a confiabilidade dos equipamentos de produção, num processo de terceirização da manutenção. Mais especificamente, tratando do caso específico da terceirização da execução de manutenção elétrica e de instrumentação do Lingotamento Contínuo da CST - Companhia Siderúrgica de Tubarão. Para tanto, foram analisados dois momentos históricos diferentes: antes e após a terceirização da execução de manutenção. Para as análises de competência utilizaram-se dois métodos de diagnóstico diferentes, sendo o primeiro deles, baseado nos estudos de comportamento propostos por David C. McClelland e compilados por Spencer & Spencer (1993). O segundo é uma proposta do próprio autor, que foi nominado locus de competência, baseado em práticas existentes e utilizando-se do que há de mais novo ligado à teoria de competência, nessa nova fase de racionalização do trabalho, tempo em que vivemos. A pesquisa foi explicativa, metodológica e aplicada. Foi realizada por meio de pesquisa de campo, sendo também bibliográfica, documental e por fim, participante. Os resultados da pesquisa mostraram que muito embora a competência das equipes de execução de manutenção elétrica e de instrumentação do Lingotamento Contínuo da CST tenha diminuído com a terceirização, isso não afetou a confiabilidade dos equipamentos de produção da unidade produtiva. Por fim, alguns pontos que poderiam explicar essa constatação são levantados ao final do trabalho.
This essay analyses how the maintenance workers competency can affect the production equipment reliability, considering a maintenance outsourcing processo More specifically, it analyses how the electrical and instrumentation maintenance execution activity outsourcing applied to the CST - Companhia Siderúrgica de Tubarão - Continuous Casting area can affect the reliability of the equipments installed on that place. For this, it has been analyzed two different historical moments: before and after the outsourcing. For the competency analysis, it has been used two different diagnosis method. The first one has been based on behavioral studies made by David C. McClelland and compiled by Spencer & Spencer (1993). The second one is a pro posai from the author of this thesis himself, based on existing practices and using what brand new exists related to competency theory, taking in account this new phase of work rationalization, which is the time we live. This method has been called '/ocus of competency'. The research itself was explanatory, methodological and applied. It has been done by means of surveys, but it used also bibliography and documentation. It has been a collaborative research as well. The results of this research have shown that even the continuous casting instrumentation and electrical maintenance execution team competency have decreased because of the outsourcing, this phenomenon has not affect the production equipments reliability of that productive area. Finally, some points that can cause this fact are remarked on at the end of this paper work.
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GOMES, D. S. R. "A Responsabilidade Social Como Estratégia de Gestão Empresarial: um Estudo do Caso CST." Universidade Federal do Espírito Santo, 2003. http://repositorio.ufes.br/handle/10/8941.
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Previous issue date: 2003-03-21Esta dissertação tem por objetivos contribuir para a discussão da Responsabilidade Social, procurando relacionar o discurso com a prática e de forma mais específica, analisar a gestão socialmente responsável da Companhia Siderúrgica de Tubarão (CST). A metodologia partiu de pesquisas bibliográficas e documentais, e de um estudo de caso, tendo como principal instrumento de coleta de dados, entrevistas semi-estruturadas. Para a análise das informações, foram agrupadas as ações no âmbito interno, cujo público-alvo são os funcionários e seus familiares e no âmbito externo, a comunidade em geral. Tomou-se como base para categorização os indicadores de Responsabilidade Social propostos pelo Instituto Ethos, uma das referências do assunto no Brasil. Dentre as conclusões, ressalta-se que o papel social das empresas tem sido cobrado pela sociedade e desenvolvido pelas empresas, sendo a responsabilidade social apresentada como uma forma de sustentação do sistema econômico, não contemplada ainda como fator estratégico, norteador das decisões e ações das empresas. Sobre a empresa estudada, percebe-se que suas ações no âmbito social e ambiental são recentes e ainda não tratadas de forma estratégica. A Gestão Ambiental destaca-se mais do que suas ações sociais. São necessários avanços no controle ambiental, no comprometimento com a comunidade, na transparência das ações, e principalmente nas relações sindicais, onde prevalecem marcas autoritárias de sua gestão. Apesar disso há o reconhecimento do esforço da empresa na busca do desenvolvimento tanto no foco interno quanto externo da responsabilidade social, tendo inclusive, algumas de suas ações premiadas.
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Lima, Celciara da Vera Cruz Paquete. "Qualidade e satisfação dos clientes face aos serviços da CST e da Unitel." Master's thesis, Universidade de Évora, 2021. http://hdl.handle.net/10174/29313.
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A qualidade do serviço está entre os principais aspectos que aumentam a satisfação do
cliente. Empresas de telecomunicações em todo o mundo tentam melhorar a qualidade
dos serviços oferecidos, não existindo em São Tomé e Príncipe estudos sobre esta
temática. O presente trabalho teve como objectivo avaliar a ligação entre Qualidade do
Serviço e a Satisfação dos Clientes face aos Serviços de Telecomunicação em São Tomé
e Príncipe, tendo como objeto de estudo as empresas CST e Unitel. A recolha dos dados
foi realizada pelo método de sondagem através da construção de um questionário
estruturado aplicado a uma amostra de conveniência a clientes da CST e Unitel residentes
na cidade de São Tomé. Os resultados permitem, não apenas conhecer a opinião dos
clientes sobre a qualidade dos serviços de telecomunicação, como a sua satisfação com
as operadoras que os prestam, assim como identificar e traçar algumas recomendações
para melhorar a qualidade dos serviços e a satisfação dos clientes. Os clientes reconhecem
que as operadoras oferecem serviços qualidade, mas precisam melhorar na questão do
atendimento e da prestação desse serviço, estando a grande maioria satisfeita com a
escolha da operadora e com o bom desempenho da mesma. Contudo, a média da
operadora UNITEL é superior à média da operadora CST, o que sugere a existência de
diferenças entre ambas as operadoras, na satisfação com o serviço e nas dimensões do
modelo SERVQUAL. Finalmente, de referir a existência de 3 cluster de clientes e também
de uma associação estatisticamente significativa entre as variáveis sociodemográficas e a
operadora a que os inquiridos fazem parte o que possibilita identificar o segmento dos
clientes; Abstract:
Service quality is among the main aspects that increase customer satisfaction.
Telecommunications companies around the world try to improve the quality of the
services offered, and there are no studies on this subject in São Tomé and Príncipe. This
study aimed to assess the link between Service Quality and Customer Satisfaction in
relation to Telecommunication Services in São Tomé and Príncipe, with the object of
study the companies CST and Unitel. Data collection was carried out using the survey
method through the construction of a structured questionnaire applied to a sample of
convenience to CST and Unitel customers residing in the city of São Tomé. The results
allow, not only to know the opinion of customers on quality telecommunication services,
such as their satisfaction with the operators that provide them, as well as identifying and
outlining some recommendations to improve the quality of services and customer
satisfaction. Customers recognize that the operators offer quality services, but they need
to improve in terms of service and the provision of this service, the vast majority being
satisfied with the choice of the operator and with its good performance. However, the
average of the UNITEL operator is higher than the average of the CST operator, which
suggests the existence of differences between both operators, in terms of satisfaction with
the service and in the dimensions of the SERVQUAL model. Finally, mention should be
made of the existence of 3 customer clusters and also of a statistically significant
association between the sociodemographic variables and the operator to which the
respondents belong, which makes it possible to identify the customers segment.
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Sosa, Micaela Janet. "Simulaciones computacionales de colorantes sensibles al voltaje (CSV) insertos en membranas biológicas modelo." Bachelor's thesis, Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales, 2020. http://bdigital.uncu.edu.ar/14060.
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En este proyecto se propone el estudio de los determinantes moleculares de la actividad interfacial y de la respuesta óptica de moléculas fluorescentes insertas en membranas lipıı́dicas polarizadas, en particular de la indocianina verde (ICG de su sigla en inglés). Un objetivo de largo alcance es el de contribuir al desarrollo de métodos espectroscópicos para determinación de actividad eléctrica de membranas, con potencial uso tanto en el ámbito de la ciencia experimental como en el diagnóstico por imágenes.
Una de las caracterıı́sticas celulares clave en el desarrollo de la vida es el intercambio selectivo de iones a través de la membrana celular, que da origen al denominado "potencial de membrana" o "potencial interfacial". Es una propiedad fundamental en la regulación de la actividad interfacial de las células en general, y como tal, provee la fuerza motriz para muchos procesos fundamentales como la respiración celular, la fotosıı́ntesis, la activación de fibras musculares, la actividad cardıı́aca y la sinapsis nerviosa.
El potencial de membrana es difıı́cil de determinar experimentalmente. El método clásico de medición in vitro (Patch Clamp) registra la corriente eléctrica a través de la membrana mediante su fijación e introducción de un microelectrodo, por lo que es altamente invasivo. En el campo del diagnóstico clıı́nico se utilizan el electroencefalograma y electrocardiograma, que tienen muy baja resolución espacial.
Durante las últimas cuatro décadas se ha realizado mucho esfuerzo en desarrollar métodos de determinación no electrofisiológicos, especıı́ficamente métodos ópticos basados en el uso de colorantes sensibles al voltaje (CSV) con respuesta electrocrómica. Los espectros de absorción y fluorescencia de los CSV son muy sensibles al potencial interfacial, debido al corrimiento diferencial de sus niveles electrónicos inducido por el campo eléctrico.
En este proyecto se propone el estudio de los determinantes moleculares de la actividad interfacial y de la respuesta óptica de moléculas fluorescentes insertas en membranas lipıı́dicas polarizadas, en particular de la indocianina verde (ICG de su sigla en inglés). Un objetivo de largo alcance es el de contribuir al desarrollo de métodos espectroscópicos para determinación de actividad eléctrica de membranas, con potencial uso tanto en el ámbito de la ciencia experimental como en el diagnóstico por imágenes.Fil: Sosa, Micaela Janet. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales.
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Martinsson, Joel. "Controlled Start Transmission Wet Clutch Temperature Modeling and Application." Thesis, Linköpings universitet, Fordonssystem, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-122166.
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Controlled Start Transmissions (CST) can be described as a mechanical transmission combined with a wet clutch for controlled torque output. CST:s are commonly used to start up heavy loads for example mining conveyors. Several CST:s can work together to share the load. The transferred torque is controlled by a hydraulic wet clutch which is a proven technology for high torque transfer and low wear. This thesis is a part of a project to increase the knowledge and improve the CST design and control performance. The heat generation in the wet clutch is the focus of this thesis. Literature review shows that most research is done in order to get high accuracy for smaller clutches and most of the high torque engagements have very short transients.Models for the CST clutch heat generation together with thermal behavior have been developed and investigated. This includes a temperature model together with a kinetic model of the gearbox and a clutch torque model. Validation of separate model components and sensitivity analysis of the parameters are made. The developed model is then analyzed by comparing measurements from a commission site and simulations to get an idea of how much heat is generated.
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Morandi, Angela Maria. "Reestruturação industrial e siderurgia : uma analise do setor siderurgico brasileiro : o caso da CST." [s.n.], 1996. http://repositorio.unicamp.br/jspui/handle/REPOSIP/285403.
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Orientador: Mario Luiz PossasTese (doutorado) - Universidade Estadual de Campinas, Instituto de Economia
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Resumo: o objetivo desta pesquisa é analisar os determinantes da decisão de investimento da Companhia Siderúrgica de Tubarão - CST -, produtora de placas, a forma particular de sua inserção na indústria siderúrgica e o seu desempenho produtivo. Para isso foram elaborados dois capítulos precedentes. O primeiro trata das transformações recentes verificadas na siderurgia em nível mundial, destacando-se sua reestrutu ração produtiva e tecnológica, bem como as principais tendências mercadológicas e tecnológicas. No segundo se recuperam os principais momentos do desenvolvimento da siderurgia brasileira, enfocando-se a atuação estatal no segmento de aços planos e a posterior privatização completa do parque siderúrgico nacional. Finalmente, o terceiro capítulo trata particularmente dó caso da CST, destacando as estratégias de vendas, de custos e de crescimento e comparando-se os dois períodos pré e pós-privatização
Abstract: Not informed.
Doutorado
Doutor em Economia
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Adel, Ali Sura. "Kan manuell analys av Csv-EPK ersättas med automatiserad analys på Sysmex XN-1000?" Thesis, Linnéuniversitetet, Institutionen för kemi och biomedicin (KOB), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-53460.
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Determination of erythrocyte count in cerebrospinal fluid (CSF-EPC) is used to exclude various intracranial hemorrhage, especially subarachnoid hemorrhage (SAH). SAH means a bleeding between the pia mater and arachnoidea which occurs due to rupture of an aneurysm in the subarachnoid space. Manual counting of erythrocytes in the cerebrospinal fluid with Bürkers chamber and microscopy has been the gold standard for the past decades, but the manual method is time consuming and requires great experience. The purpose of this study was to evaluate if manual analysis of CSF-EPC with counting chamber, and light microscopy can be replaced by automated analysis of CSF-EPC with Hematology Analyzer XN-1000 (Sysmex). Fortyeight cerebrospinal fluid samples with various concentrations of erythrocytes ware prepared by diluting known concentration of erythrocytes in cell-free CSF. Prepared CSF-samples with added erythrocytes were analyzed first on the XN-1000. Thereafter, manual counting of erythrocytes was performed using Bürkers counting chamber. A linear regression was established to describe the correlation between the automated analysis of the CSF-EPC and manual analysis of the CSF-EPC. Imprecision in the analysis of the CSF-EPC on the XN-1000 (Sysmex) was assessed by within-run imprecision. A very good correlation (r = 0.999) was found between the XN-1000 and manual counting. For results in the lower range, 100 - 5000 (106/L), correlation was also good (r = 0.997). The coefficient of variation was 19,8 % at CSF-EPC of 370 x 106/L and 3.1 % at CSF-EPC of 25 950 x 106/L. The sensitivity for analysis of CSF-EPC on XN-1000 was 370 x 106/L. The conclusion is that the analysis of Csv-EPC on XN-1000 can be used for clinical diagnostics of CSF- samples. However, it should be noted that XN-1000 has poor sensitivity for low CSF-EPC values < 370 x 106/L. To ensure high diagnostic quality even in CSF-samples with low erythrocyte counts are recommended a reference limit of < 500 x 106/L as a practical cut off for supplemental microscopic counting in routine healthcare laboratories.SAMMANFATTNING Bestämning av antalet erytrocyter i cerebrospinalvätska (Csv-EPK) används för att utesluta olika intrakraniella blödningar, särskilt subaraknoidalblödning (SAB). SAB betyder en blödning mellan pia mater och araknoidea som uppstår på grund av ruptur av ett aneurysm i subaraknoidalrummet. Manuell räkning av antalet erytrocyter i cerebrospinalvätska med Bürkers kammare och mikroskopi har varit den gyllene standarden under de senaste decennierna, men den manuella metoden är tidskrävande och kräver stor erfarenhet. Syftet med detta examensarbete var att utvärdera om manuell analys av Csv-EPK med räknekammare och ljusmikroskopi kan ersättas med automatisk analys av Csv-EPK med hematologianalysatorn XN-1000 (Sysmex). Fyrtioåtta cerebrospinalvätskeprover med varierande koncentrationer av antalet erytrocyter framställdes genom att späda kända koncentrationer av erytrocyter i cellfri Csv. Framställda Csv-prover med tillsatta erytrocyter analyserades först på XN-1000. Efter detta utfördes manuell räkning av erytrocyter i Bürkers kammare. En linjär regression upprättades för att beskriva korrelation mellan automatiserad analys av Csv-EPK och manuell analys av Csv-EPK. Imprecisionen avseende analys av Csv-EPK på XN-1000 (Sysmex) bedömdes genom inom-serie-imprecision. En mycket god korrelation (r = 0,999) fanns mellan XN-1000 och manuell räkning. För analysresultat inom det lägre område 100 - 5000 (106/L) var korrelationen också god (r = 0,997). Variationskoefficienten var 19,8 % vid Csv-EPK på 370 x 106/L respektive 3,1 % vid Csv-EPK på 25950 x 106/L. Känsligheten för analys av Csv-EPK på XN-1000 var 370 x 106/L. Slutsatsen är att analys av Csv-EPK på XN-1000 kan användas för klinisk diagnostik av Csv-prover. Däremot bör det noteras att XN-1000 har sämre känslighet för låga Csv-EPK värden < 370 x 106/L. För att kunna säkerställa hög diagnostisk kvalitet även på Csv-prover med låga erytrocytantal rekommenderas en referensgräns på < 500 x 106/L som praktisk cut off för kompletterande mikroskopisk räkning vid rutinsjukvårdslaboratorier.
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Strömbergsson, Fredrik. "Rapporteringsfunktion i Moodle." Thesis, Mittuniversitetet, Avdelningen för data- och systemvetenskap, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-22645.
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Maincon AB är ett företag som sysslar med att skapa kurser tillsammans medandra företag och sedan lära ut dessa via Moodle som är en plattform för elärande.Företaget ville ha hjälp med att förbättra en rapportfunktion för eninsticksmodul i Moodle så att en bättre överblick över situationen i en kurskunde fås. Detta projekt är ett fortsättningsarbete på ett tidigare projekt där ettdiagram introducerades för att visuellt ge en bättre överblicksbild. Metodensom valdes var att skapa en egen version av denna rapportfunktion då dendåvarande PHP lösningen var bristfällig. En ny och förbättrad version skapadesi JavaScript där mer information kunde visas och filtreras i HTML och sammainformation kan exporteras till CSV som sen kan importeras till Excel.Maincon AB is a company that among other things develops courses togetherwith other companies and then teach these courses via Moodle which is aplatform for e-learning. The company wanted help to improve a report-functionfor a plugin in Moodle so they could get a better overview of the situation in acourse. This project is a continuation of a previous project that implemented achart that visually improved the overview. In this project, the method toimprove the overview was to create a new version of the previous PHP solutionthat lacked the functionality. A new and improved version was created withJavaScript where more information could be shown and filtered in HTML, andthe same information could be exported to CSV and then imported to Excel.
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Boberg, Henrik, and Campodonico Mariella Reyes. "Vinst med grönt samvete : En fallstudie av hur Vattenfall har utvecklat sitt CSR-arbete under det senaste decenniet." Thesis, Uppsala universitet, Företagsekonomiska institutionen, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-155649.
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Företag har idag en stor press från olika intressenter i samhället på att vara både vinstdrivande och ta socialt och miljömässigt ansvar. Elbolag är speciellt påverkade då de opererar i en bransch där miljöfrågor har ett stort utrymme. Det är således intressant att undersöka huruvida ett av de ledande elbolagen på den europeiska marknaden, Vattenfall, har reagerat på de ökade påtryckningarna från intressenter över tid. På vilket sätt kan vi se en förändring i hur Vattenfall presenterar sitt CSR-arbete från och med det att de började hållbarhetsredovisa år 2001 fram till idag? För att besvara vår frågeställning har vi utfört en fallstudie där vi analyserat Vattenfalls samtliga hållbarhetsredovisningar samt utfört intervjuer med deras Senior Advisor på Sustainability Performance Monitoring och CSR-manager. Vi kunde se en förändring i Vattenfalls strategi samt hur de presenterar sitt CSR-arbete i deras hållbarhetsredovisningar under den tidsperiod vi undersökt. Koncernen har idag alltmer fokus på att utveckla sin kärnverksamhet till att bli mer miljövänlig och har satt tydliga mål. De har också utvecklat en kontinuerlig intressentdialog för att kunna följa upp kraven som intressenter ställer på dem. Deras nya strategi som presenterades år 2010 tyder på att Vattenfall i all större utsträckning försöker att kombinera sitt CSR-arbete med att vara vinstdrivande.
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Hu, Shishan. "Application of computational fluid dynamics to aerosol sampling and concentration." [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-1345.
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Ribeiro, Alvaro José Ferreira. "Os Impactos do Aumento do Nível de Escolaridade do Trabalhador na Gestão Organizacional da CST." reponame:Repositório Institucional do FGV, 2001. http://hdl.handle.net/10438/3774.
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Previous issue date: 2001Este trabalho pretende identificar como as mudanças no comportamento do empregado, influenciadas pelo aumento de sua escolaridade, obtida através de um programa de complementação educacional realizado na própria empresa, impactam na gestão organizacional. Busca mostrar, como essas mudanças interferem no relacionamento chefe - subordinado, que é estabelecido pelo estilo gerencial praticado pelo gerente, e no relacionamento empresa - empregado, que é definido pela política de Recursos Humanos, ao estabelecer planos de contratação, remuneração, beneficios, capacitação, entre outros. A confrontação dos modelos teóricos, advindos da pesquisa bibliográfica, e práticos, resultados da pesquisa de campo, poderão auxiliar de maneira significativa na definição do estilo gerencial e da política de Recursos Humanos mais adequados a serem praticados no relacionamento com esse novo tipo de empregado.
This work intends to identify how changes in the employees behavior, influenced by the increasing of the educational leveI, gained by a internaI complementary educational program affect business. How this changes interfere in chief-employee relationship, established by management style, and in enterprise-employee relationship which is defined by Human Resource policy, when establishing employment, payment, profit and capability plans. Confrontation of theoretical mo deI, resulting from bibliographic research, and practical, coming from field work, may help in significant way in management style definition and more appropriate Human Resource policy to be adopted in the relationship with this new kind of employee.
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Aguirre, E. "The development and evaluation of a maintenance Cognitive Stimulation Therapy (CST) programme for people with dementia." Thesis, University College London (University of London), 2012. http://discovery.ucl.ac.uk/1378587/.
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Background: Cognitive Stimulation Therapy (CST) is a cognitiveDbased approach for dementia that has been shown to be cost effective and beneficial for cognition and quality of life. However future evidence is needed in relation to the length of the programme required and the effects of CST over an extended period. Aim: To develop and evaluate a 24Dweek programme of MCST, following the Medical Research Council (MRC) framework for the development and evaluation of complex interventions. Methods: A Cochrane Review was conducted in order to consolidate the evidence of cognitive stimulation for dementia and the results were used in the development of the programme, including a Delphi process with a consensus conference and focus groups with service users. A multicentre randomised controlled trial followed, including 18 centres and recruiting 272 people with mild to moderate dementia who received CST initially and were randomised afterwards to receive 24 weeks of either MCST or treatment as usual. Results: The intention to treat analysis showed that the MCST programme significantly improved quality of life of people with dementia at three and six months follow up, and activities of daily living at three month follow up. A sub analysis of people on acetyl cholinesterase inhibitors, showed that the effects of the longDterm intervention were additive to the medication effect. Conclusion: This study provides good evidence for the longDterm quality of life benefits of the CST maintenance programme for people with dementia.
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Ribeiro, Milton Vieira. "As demonstrações financeiras em US GAAP tomadas como instrumento gerencial da CST: um estudo de caso." reponame:Repositório Institucional do FGV, 2001. http://hdl.handle.net/10438/4031.
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Made available in DSpace on 2009-11-18T19:01:33Z (GMT). No. of bitstreams: 0
Previous issue date: 2001The purpose of this research is to evaIuate the financiaI statements prepared in accordance with United States Generally Accepted PrincipIes as a decision making instrument, by CST's administration, instead of the financial statements prepared according to the Brazilian Generally Accepted Accounting PrincipIes. As a study of CST's case, its financiai reports, including financiai statements, administration reports, press release and others, reIated to the period from 1994 to 2000, are the basis of this research. The information of such documents were compared and anaIyzed. Also, it was necessary to research about the main accounting rules from Brazilian and American accounting, that can atfect the result of this study. Some financiai and accounting' s books from both countries, Brazil and United States, were used as a conceptual basis too. Through the achieved results it was possible to know the influence of the ditferences of accounting principIes on the financiaI information and, so, to evaluate which financiaI statements, Brazilian or American, are more consistent, for management purposes, considering the CST's characteristics.
A finalidade desta pesquisa é avaliar as demonstrações financeiras da CST preparadas de acordo com os princípios contábeis geralmente aceitos nos Estados Unidos, como um instrumento de tomada de decisões, pela administração da CST, ao invés dos demonstrativos preparados de acordo com os princípios contábeis geralmente aceitos no Brasil. Como estudo de caso da CST, os seus relatórios financeiros, incluindo demonstrações financeiras, relatórios de administração, press release, e outros, relacionados ao periodo de 1994 a 2000, constituem a base desta pesquisa. As informações de tais documentos foram comparadas e analisadas. Também, foi necessário pesqUIsar sobre as principais regras contábeis do Brasil e dos Estados Unidos que afetam o resultado deste estudo. Alguns livros sobre contabilidade e finanças de ambos os paises, Brasil e Estados Unidos, foram também usados como uma base conceitual. A partir dos resultados obtidos foi possível conhecer a influência das diferenças de princípios contábeis e, aSSIm avaliar quaIs demonstrações contábeis, brasileiras ou amencanas, são mats consistentes para finalidades gerenCIatS, considerando as caracteristicas da CST.
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Medina, Noemy Vaz. "Relatório de estágio sobre a gestão de recursos humanos na CST- Companhia Santomense de Telecomunicações, SARL." Master's thesis, Instituto Superior de Economia e Gestão, 2012. http://hdl.handle.net/10400.5/10425.
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Mestrado em Gestão de Recursos HumanosA Gestão de Recursos Humanos baseia-se, actualmente, no facto de o desempenho das organizações depender da contribuição das pessoas que as compõem, da forma como estão organizadas e do investimento que é realizado ao nível do seu desenvolvimento. O maior tesouro das organizações são as pessoas, isto é, o capital humano é o pilar de qualquer organização. As pessoas fazem as organizações e as organizações fazem as pessoas. Atualmente, torna-se cada vez mais necessário mudar a mentalidade dos gestores de RH, dada a globalização, cada vez maior, dos mercados e a necessidade de inovação e criatividade para responder às exigências do mercado. A gestão de recursos humanos deve conseguir complementar a eficácia e a eficiência organizacionais, isto é, fazer da eficácia e eficiência a sua meta. O presente relatório descreve a execução de um estágio curricular sobre a Gestão de Recursos Humanos na CST - Companhia Santomense de Telecomunicações, SARL, com sede em São Tomé. Começa com uma breve caracterização da organização, seguida da revisão e análise da literatura dos temas presentes no plano de estágio. Prossegue com a descrição das actividades desenvolvidas durante o estágio, bem como uma análise crítica sobre a GRH na CST, onde constam algumas conclusões, limitações e sugestões para a organização, contribuindo assim para a melhoria na GRH da mesma.
Human Resources Management, presently, is based on the fact of the performance of organizations depending on the contribution of the people working in them, how they are organized and the investment made towards their development. People are the greatest treasure of organizations; i.e. human capital is the bulwark of any organization. People make organizations and organizations make people. Today, it has become increasingly needful to change the mentality of HR managers, in the face of the ever increasing globalization of markets and the need for innovation and creativity to meet market needs. Human resources management must complement organizational effectiveness and efficiency; meaning that effectiveness and efficiency must be its goal. This report outlines the execution of a Human Resources Management curriculum internship in CST Companhia Santomense de Telecomunicações, based in São Tome. It begins with a brief characterization of the organization, followed by the review and analysis of literature of the topics contained in the internship plan. It then continues with the description of activities carried out during the internship, as well as a critical analysis of HRM in CST, which contains some conclusions, limitations and suggestions for the organization, thus contributing to the enhancement of the HRM of the company.
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Aldrich, Annette Patrizia. "The redox speciation and biogeochemistry of iron in aquatic systems." Thesis, University of Liverpool, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.367287.
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Kollár, Marcel. "Návrh antény PIFA pro GSM pásma." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-219167.
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The main topic of this diploma thesis is a design of the PIFA antenna working in GSM bands. In the beginning there is a brief analysis of planar antennas. The thesis describes PIFA antenna and the techniques for minimization of dimensions of the antenna. Essential part of the thesis is dedicated to multicriterial optimalizaton of the antenna shape. The genetic algorithm programmed in the MATLAB enviroment cooperates with a full-wave solver CST to obrain desired impedance matching of the antenna its radiationt paterns. Also dimensions of the antenna can be minimized using the optimization procedure. Final part of the thesis compares measured data of the optimalized antenna with results obtained in CST Microwave Studio.
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Blixt, Helena, and Jennifer Cunningham. "CSR- det senaste på tapeten eller limmet som håller allt samman? : En kvalitativ studie om hur företag kan arbeta strategiskt för att implementera CSR i Kina." Thesis, Linnéuniversitetet, Institutionen för marknadsföring (MF), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-37151.
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Problemformulering: Vilken problematik möter svenska företag i deras leverantörskedja vid implementering av CSR i Kina? Hur kan företag svenska arbeta för att överkomma den identifierade problematiken vid implementering av CSR i Kina? Syfte: Studien ämnar undersöka vad svenska företag möter för problematik vid implementering av CSR i Kina samt hur de strategiskt kan arbeta för att överkomma detta. Vidare belyser även studien intressenter som kan utgöra en del av problematiken. Metod: Uppsatsen grundas på en kvalitativ studie där vi valt att anta en abduktiv ansats. Den empiriska datan utgörs av intervjuer med personer med spetskompetens inom CSR. Då studien riktar sig till den kinesiska marknaden genomfördes fyra av sex intervjuer i Shanghai, Kina. Slutsatser: Studien visar att det finns problem vilka är kopplade indirekt samt direkt till företags intressenter. Vidare visar studien att den identifierade problematiken kan i viss utsträckning överkommas genom att långsiktigt eftersträva delat värde för företagen och dess omgivning.Research question: What problems do Swedish companies face when implementing CSR in their supply chain in China? How can Swedish companies work to overcome the identified problems when implementing CSR in China? Purpose: The purpose of this thesis is to identify what problems Swedish companies face when implementing CSR in China and how they can create a strategy to overcome these problems. Furthermore, the thesis aims to highlight which stakeholders contribute to the problem. Method: The thesis is based on a qualitative study which was based on semi-structured interviews with respondents with expertise in the chosen research field. Some of the interviews were carried out in Shanghai, China, considering the study is aimed at the Chinese market. Conclusion: The result of the study show that some of the identified problems are directly and indirectly linked with the companies stakeholders. Furthermore the study shows that the problems can be overcome by long term strategies in the form of shared value by the company and its environment.
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Carrijo, Elias Calixto. "Aplicação do elemento finito DKT à análise de cascas." Universidade de São Paulo, 1995. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-24042018-115214/.
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Neste trabalho apresenta-se um elemento finito de casca plano que é obtido pela composição de um elemento de placa com um de membrana. O elemento de placa usado, o DKT (Discrete Kirchhoff Theory), pertence à classe dos elementos triangulares com nove graus de liberdade (uma translação e duas rotações por nó), e é obtido pela imposição da hipótese de Kirchhoff nos seus pontos nodais. Para o elemento de membrana, usou-se o elemento CST (Constant Strain Triangle), com seis graus de liberdade (duas translações por nó). O elemento finito resultante DCT, possui dezoito graus de liberdade (três translações e três rotações, sendo uma das rotações fictícia- no plano do elemento). Simples exemplos de placa e chapa no espaço foram analisados para se testar o elemento, e finalmente uma casca cilíndrica uniformemente carregada foi analisada e o resultado obtido comparado com o fornecido por outros autores. Neste estudo, o elemento DKT mostrou-se eficiente na análise de cascas.This work presents a flat shell finite element composed of plates in bending and in tension finite elements. The bending element used, the DKT (Discrete Kirchhoff Theory) belongs to the class of triangular elements with nine degrees of freedom (the transverse displacement and its derivatives at each node) and it is obtained from the theory of plates with shear force influence with Kirchhoff hypothesis imposed in the nodes of the element. The tension finite element is the well known CST (Constant Strain Triangle) with six degrees of freedom (the displacement u and v at each node). The resulting finite element, called DCT, has 18 degrees of freedom, including an extra and fictitious rotation in the normal direction to the surface of elements. Single plates in bending and in tension described in a tridimensional system of coordinates were analyzed to test the adopted finite elements and finally cylindrical shell uniformly loaded were analyzed and the results compared with those of authors. In the work the DKT element shown to be a reliable finite element to be used in shell analysis.
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Rajagopalan, Venkateswaran. "Evaluation of Upper Motor Neuron Pathology in Amyotrophic Lateral Sclerosis by MRI: Towards Identifying Noninvasive Biomarkers of the Disease." Cleveland State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=csu1288020485.
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Kim, Sung Hyun. "Ion exchange kinetics of cesium for various reaction designs using crystalline silicotitanate, UOP IONSIV IE-911." Texas A&M University, 2003. http://hdl.handle.net/1969.1/282.
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Through collaborative efforts at Texas A&M University and Sandia National Laboratories, a crystalline silicotitanate (CST), which shows extremely high selectivity for radioactive cesium removal in highly concentrated sodium solutions, was synthesized.
The effect of hydrogen peroxide on a CST under cesium ion exchange conditions has been investigated. The experimental results with hydrogen peroxide showed that the distribution coefficient of cesium decreased and the tetragonal phase, the major component of CST, slowly dissolved at hydrogen peroxide concentrations greater than 1 M. A simple and novel experimental apparatus for a single-layer ion exchange column was developed to generate experimental data for estimation of the intraparticle effective diffusivity. A mathematical model is presented for estimation of effective diffusivities for a single-layer column of CST granules. The intraparticle effective diffusivity for Cs was estimated as a parameter in the analytical solution. By using the least square method, the effective diffusivities of 1.56 ± 0.14 x 10-11 m2/s and 0.68 ± 0.09x 10-11 m2/s, respectively, were obtained. The difference in the two values was due to the different viscosities of the solutions. A good fit of the experimental data was obtained which supports the use of the homogeneous model for this system. A counter-current ion exchange (CCIX) process was designed to treat nuclear waste at the Savannah River Site. A numerical method based on the orthogonal collocation method was used to simulate the concentration profile of cesium in the CCIX loaded with CST granules. To maximize cesium loading onto the CST and minimize the volume of CST, two design cases of a moving bed, where the fresh CST is pulsed into the column at certain periods or at certain concentration of cesium, were investigated. Simulation results showed that cesium removal behavior in the pilot-scale test of CCIX experiment, where the column length is 22 ft and the CST is pulsed 1 ft in every 24 hours, was well predicted by using the values of the effective diffusivities of 1.0 to 6.0 × 10-11 m2/s.
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Chighine, Andrea. "Towards chemical species tomography of carbon dioxide for aviation turbine emissions." Thesis, University of Edinburgh, 2017. http://hdl.handle.net/1842/29577.
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This thesis sets out to examine the proposal that, by using tomography and gas sensing techniques to detect and image gas concentration in fast moving flows, engineers can improve the combustion diagnostics and emissions performance of gas turbines, enabling a better understanding of combustion and design optimisation of greener engines. The key factor is the combination of tomography with Tunable Diode Laser Absorption Spectroscopy (TDLAS) gas sensing technology, implemented simultaneously along many beams, to image the gas concentration distribution in the exhaust plume of a gas turbine, in a plane perpendicular to the plume flow direction. The target gas species is carbon dioxide, CO2, and the absorption feature chosen is at a wavelength of 1997.2 nm. The narrow spectral absorption properties of such small molecules present a considerable challenge for a multi-beam tomographic implementation. Moreover, the design, oriented to harsh and industrial environments, presents key challenges for the design of robust optics and electronics for the collection of reliable data. The development of a 126-beam tomography system required the investigation of recently developed TDLAS techniques and their compatibility with data acquisition (DAQ) system firmware strategies to be implemented by custom DAQ electronics. A novel FPGA-based single channel TDLAS CO2 detection system has been designed and built to demonstrate the feasibility for the replication of 126-channels in the full system. Further proof-of-concept experiments carried out at full scale have produced tomographic images of phantom CO2 distributions that demonstrate the utility of the CST technique.