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71	Calibration of an ultrasound tomography system for medical imaging with 2D contrast-source inversion Faucher, Gabriel Paul 03 April 2013 (has links) This dissertation describes two possible methods for the calibration of an ultrasound tomography system developed at University of Manitoba's Electromagnetic Imaging Laboratory for imaging with the contrast-source inversion algorithm. The calibration techniques are adapted from existing procedures employed for microwave tomography. A theoretical model of these calibration principles is developed in order to provide a rationale for the effectiveness of the proposed procedures. The applicability of such an imaging algorithm and calibration methods in the context of ultrasound are discussed. Also presented are 2D and 3D finite-difference time-domain update equations for the simulation of acoustic wave propagation in inhomogeneous media. Details regarding the application of an absorbing boundary-condition, point-source modelling and the treatment of penetrable objects are included in this document. ultrasound imaging medical calibration inversion fdtd fem csi tomography contrast-source breast cancer acoustic inhomogeneous acoustical modelling
72	指數調整效應:以滬深300 為例 / The Comprehensive Analyze of Index Composition Change in CSI300 Index 温智恒, Wun, Chi Hang Unknown Date (has links) 本篇論文以滬深300 指數調整前後期的異常報酬、影子成本、流動性、資訊不稱性及套利風險的變動觀察中國投資者的行為。本研究發現在調整後的短期間中中國股票的報酬與國外文獻的變動方向一致,調入股將上漲而調出股則下跌，但於長期則有十分明顯的相反傾向。本文將影子成本等四個變數加入作前後期變動的觀察。發現調整期前後影子成本、流動性、套利風險和資訊不對稱性的變動都與與文獻變動方向假設一致。最後本文把異常報酬作應變數，其餘各項作自變數去觀察四個變數影響報酬的程度和方向。回歸後發現只有流動性的影響符合前人以S&P500 作指標的研究,其他則是有著不一致的影響。本文認為這個現象與文獻中不同的原因是滬深300 指數偏向於納入高估的股票而剔除低估的股票。滬深300 指數是以股票前一年的交易量大小作標準，這使得81%交易量為個人投資者提供的滬深300 指數偏向納入高估股票。這可能使得中國市場的指數調整效應與文獻並不一致。 / This paper empirically examines the differences of abnormal return, shadow cost, liquidity effect, information asymmetry and arbitrage risk during the composition change of CSI300 index to observe the behavior of investors in China market. Although this paper examines the short term return of adjusted stock change in the same direction as recent studies, added stocks increase and deleted stocks decrease, the long term return reverse. This paper also computes those four variables to observe their changes during the adjustment. The results show that the movements of these four variables are similar to the previous studies. To observe how these variables affect the return of the stocks, this paper computes a regression analysis with the cumulative abnormal return as the dependent variable. The results show that only the affection of liquidity matches the recent studies of S&P 500, when the others are not. The reason of this phenomenon maybe because of the CSI 300 index intends to include the overestimated stocks and exclude the underestimated stocks. The adjustment is determined by the past one year trading volume, which means that the market, with individual investors provided 81 % of trading volume, may possibly overestimate the included stocks. That maybe the reason why the influence of composition change is not similar to recent studies. 影子成本指數調整滬深300 shadow cost index composition change CSI 300
73	How national culture on consumers' decision-making styles: a comparative study among Americans, Brazilians, Chinese, and japanese in the purchase of cell phones. Chan, Yie Leng January 2009 (has links) Submitted by Estagiário SPT BMHS (spt@fgv.br) on 2013-08-01T13:34:41Z No. of bitstreams: 1 Final version - THESIS chan yie leng.doc: 2938368 bytes, checksum: 03942470ec5037197e0ae99a1d62aa45 (MD5) / Approved for entry into archive by Estagiário SPT BMHS (spt@fgv.br) on 2013-08-01T13:35:00Z (GMT) No. of bitstreams: 1 Final version - THESIS chan yie leng.doc: 2938368 bytes, checksum: 03942470ec5037197e0ae99a1d62aa45 (MD5) / Approved for entry into archive by Estagiário SPT BMHS (spt@fgv.br) on 2013-08-01T13:35:09Z (GMT) No. of bitstreams: 1 Final version - THESIS chan yie leng.doc: 2938368 bytes, checksum: 03942470ec5037197e0ae99a1d62aa45 (MD5) / Made available in DSpace on 2013-08-01T13:35:20Z (GMT). No. of bitstreams: 1 Final version - THESIS chan yie leng.doc: 2938368 bytes, checksum: 03942470ec5037197e0ae99a1d62aa45 (MD5) Previous issue date: 2009 / The influence of the national culture on consumer decision-making styles is investigated using a sample of Americans, Brazilians, Chinese, and Japanese consumers who have purchased a cell phone in the past three years. To make the research possible, a survey was used as a method of data collection. It relates Hofstede’s cultural classification typology with Sproles and Kendall’s consumer style inventory (CSI). The multivariate analysis of variance (MANOVA) results indicate six decision-making styles together with other consumer behavioral characteristics that can be used to distinguish and profile consumers who purchase cell phones. Empirical findings reveal that among Americans, Brazilians, and Japanese; Americans are the most quality conscious, brand conscious, innovative, and hedonistic shoppers; Brazilians are the most loyal, and Japanese, the most confused by overchoice consumers. Conceptual contributions and managerial implications are discussed. National culture decision-making style Hofstede consumer style inventory (CSI) Administração de empresas
74	Sell, Sell, Sell, An Exploratory Analysis of Criminal Justice Education and the Shift to Consumerism Lanson , Logan J. 15 April 2020 (has links) No description available. Criminology Criminal justice curriculum CSI-effect criminology student-consumer attitudes enrollment cliff enrollment drop-off standards accreditation consumerism
75	Inomhuspositionering med bredbandig radio Gustavsson, Oscar, Miksits, Adam January 2019 (has links) In this report it is evaluated whether a higher dimensional fingerprint vector increases accuracy of an algorithm for indoor localisation. Many solutions use a Received Signal Strength Indicator (RSSI) to estimate a position. It was studied if the use of the Channel State Information (CSI), i.e. the channel’s frequency response, is beneficial for the accuracy.The localisation algorithm estimates the position of a new measurement by comparing it to previous measurements using k-Nearest Neighbour (k-NN) regression. The mean power was used as RSSI and 100 samples of the frequency response as CSI. Reduction of the dimension of the CSI vector with statistical moments and Principal Component Analysis (PCA) was tested. An improvement in accuracy could not be observed by using a higher dimensional fingerprint vector than RSSI. A standardised Euclidean or Mahalanobis distance measure in the k-NN algorithm seemed to perform better than Euclidean distance. Taking the logarithm of the frequency response samples before doing any calculation also seemed to improve accuracy. / I denna rapport utvärderas huruvida data av högre dimension ökar noggrannheten hos en algoritm för inomhuspositionering. Många lösningar använder en indikator för mottagen signalstyrka (RSSI) för att skatta en position. Det studerades studerade om användningen av kanalens fysikaliska tillstånd (CSI), det vill säga kanalens frekvenssvar, är fördelaktig för noggrannheten.Positioneringsalgoritmen skattar positionen för en ny mätning genom att jämföra den med tidigare mätningar med k-Nearest Neighbour (k-NN)-regression. Medeleffekten användes som RSSI och 100 sampel av frekvenssvaret som CSI. Reducering av CSI vektornsdimension med statistiska moment och Principalkomponentanalys(PCA) testades. En förbättring av noggrannheten kunde inte observeras genom att använda data med högre dimension än RSSI. Ett standardiserat Euklidiskt eller Mahalanobis avståndsåatt i k-NN-algoritmen verkade prestera bättre än Euklidiskt avstånd. Att ta logaritmen av frekvenssvarets sampel innan andra beräkningar gjordes verkade också förbättra noggrannheten. Indoor Localisation WiFi-fingerprinting k-Nearest Neighbour RSSI CSI Elektroteknik och elektronik
76	Hur platsmarknadsföring behåller Generation Y : En fallstudie vid Luleå Kommun Fransson, Viktor, Andersson, Petter January 2018 (has links) Kommuner använder platsmarknadsföring för att attrahera och behålla medborgare vilket under senare år blivit mer aktuellt då konkurrensen mellan platser har ökat. Tidigare har städers platsmarknadsföring varit riktad mot att utveckla turism, men idag används strategin framförallt för att framhäva staden som en attraktiv plats för företag, och medborgare att leva i. Då det är viktigt för kommuner att ha en gynnsam befolkningsutveckling för att överleva, samt att få yngre individer att stanna inom kommunen, vilket bidrar till långsiktiga skatteintäkter. För att kommuner ska kunna utföra lyckade marknadsföringsstrategier är det viktigt att förstå medborgarnas behov och spegla det i marknadsföringen. Ovan nämnd fakta bidrog till avsikten med denna uppsats som var att beskriva och till viss del förklara hur platsmarknadsföring kan användas av en kommun för att behålla medborgare av Generation Y. Uppsatsens syfte var att uppnå en djupare förståelse för hur kommuner kan behålla Generation Y, där studiens forskningsfrågor utformades och kopplades till relevanta teorier inom forskningsområdet för att besvara studiens syfte. Genom en kvalitativ fallstudie genomfördes flertalet intervjuer med respondenter från Generation Y, vilket gav insikt till aspekter som Generation Y värdesätter inom en kommun. Studien fann att utbud, variation och tillgänglighet är centrala aspekter för att behålla medborgare. Där aspekterna nattliv, evenemang och offentliga transportförbindelser var mest önskvärda för Generation Y. Även möjligheten till delaktighet, och att kunna påverka beslut var centrala aspekter. Utifrån studiens resultat bör kommuner i större utsträckning sträva efter att skapa en relation med medborgare av Generation Y. Där kommuner involverar medborgarna så att de känner delaktighet och upplever att de kan påverka utvecklingen av kommunen de bor i, vilket ökar möjligheten till att behålla Generation Y. Studiens resultat kombinerat med bakomliggande teorier i ämnet påvisar relevansen av att kommuner behöver kunskap om vad Generation Y värdesätter, detta för att kunna utföra en passande marknadsföringsstrategi som behåller de som medborgare. Platsmarknadsföring Stadsmarknadsföring Generation Y Customer Relationship Management (CRM) Citizen Satisfaction Index (CSI) Platsidentitet Economics and Business Ekonomi och näringsliv
77	The road towards the flawless residence : A case study in process- and quality management / Vägen till den felfria bostaden : En fallstudie i process- och kvalitetsstyrning Andersson, Conny, Björk, David January 2021 (has links) This study was initiated to examine whether processes of the construction company JM ABare followed and how they can be streamlined, if the targeted goals are reached, and whenand why prescribed routines are abandoned. The study was carried out through onlinequalitative interviews with supervisors at nine examined construction projects, and withofficials within the JM AB organization.The correspondence with employees emphasized the importance of communication,experience feedback, and quality- and process control. Continuous improvement is central atJM AB, and the study shows that proactive work against errors and flaws in production andwarranty assurance can be further strengthened through enhanced communication andexperience feedback.The results suggest that resource- and cost inefficiencies can be reduced through preventiveefforts, emphasis on comprehensibility in the internal quality goals, and a thoroughconsequence analysis in case of late administrative changes in the construction process.Furthermore, the results show the importance of clear communication towards the endcustomer, as well as the value in proactive declaration of expected deviations; this will leadtowards higher CSI, Customer-Service-Index The study is limited to processes and methodsused within JM AB and is primarily focused on the production phase and warrantyassurance.This study resulted in several suggestions for improvement related to customercommunication, centralized internal quality controls, and more efficient internalcommunication and experience feedback. The results also stress the importance of clearlycommunicating JM’s desired quality level to both subcontractors and during procurement. / Studien ämnade att undersöka hur JMs framtagna arbetsprocesser efterföljs och kaneffektiviseras, om uppsatta mål uppnås samt när och varför beskrivna rutiner frångås.Studien genomfördes på distans genom kvalitativa intervjuer med arbetsledare i utvaldaprojekt, samt tjänstemän inom företagets organisation. Vid intervjuer och samtal medanställda betonades vikten av kommunikation, erfarenhetsåterföring, kvalitets- ochprocesstyrning.Ständig förbättring är centralt på JM och i resultaten framgår att det proaktiva arbetet för attmotverka fel och brister i produktion och garantiskedet kan stärkas genom förbättradkommunikation och erfarenhetsåterföring. Genom preventiva insatser och stor vikt påtydlighet kring företagets interna kvalitetskrav samt konsekvensanalys vid ändringar avunderlag i tidiga byggskeden kan resurs- och kostnadskrävande moment minimeras.Resultaten påvisade vikten av god kommunikation gentemot slutkund samt värdet i attproaktivt kommunicera förväntade avvikelser för att på sikt höja NKI, Nöjd-Kund-Index.Studien är avgränsad till JMs processer och arbetsmetoder samt fokuserar främst påprocesser relaterade till produktion och garanti.Studien resulterade i ett flertal förbättringsförslag relaterade till kundkommunikation,centraliserad försyn, samt effektiviserad intern kommunikation och erfarenhetsåterföring,men främst redovisas vikten att i upphandling och till underentreprenörer tydliggöra denhöga kvalitetsnivå JM eftersträvar. Experience feedback Process control CSI Customer Satisfaction Index Continuous improvement Quality control. Erfarenhetsåterföring processarbete kvalitetsstyrning NKI förbättringsarbete. Construction Management Byggproduktion
78	Adaptation in multiple input multiple output systems with channel state information at transmitter Huang, Jinliang January 2007 (has links) This thesis comprises two parts: the first part presents channel-adaptive techniques to achieve high spectral efficiency in a single user multiple-input multiple-output (MIMO) system; the second part exhibits a programmable and reconfigurable software-defined-radio orkbench(SDR-WB) in the Matlab/Octave environment that accommodates a variety of wireless applications. In an attempt to achieve high spectral efficiency, an adaptive modulation technique is applied at the transmitter to vary the data rate depending on the channel state information (CSI). To further enhance the spectral efficiency, adaptive power allocation schemes are applied in the spatial domain to adjust the power on every transmit antenna. We analyze several power control schemes subject to a peak power constraint to maximize the spectral efficiency given an instantaneous target bit-error-rate (BER). A novel power allocation trategy is proposed to achieve high spectral efficiency with relatively low complexity. In addition, adaptive techniques that switch across different MIMO schemes enables even higher spectral efficiency by choosing the scheme with the highest spectral efficiency. We propose a new method to switch between spatial multiplexing with zero-forcing (ZF) detection and orthogonal space-time block coding (OSTBC). This is done by exploiting closed form expressions of the spectral efficiencies--discrete rate spectral efficiency--and finding the crossing points of the two curves. The proposed adaptation scheme adds limited complexity to the transmitter since it requires only statistical information of the channel, which does not change as time evolves. Software Defined Radio (SDR) has received more and more interest recently as a promising multi-band multi-standard solution for transceiver design. In order to support as many wireless applications as possible, we build up a programmable and reconfigurable workbench, namely SDR-WB, in Matlab/Octave environment. The workbench is functionally modularized into generic blocks to facilitate fast development and verification of new algorithms and architectures. The modulation formats that are currently supported by the SDR-WB are MIMO, Orthogonal frequency-division multiplexing (OFDM), MIMO-OFDM, DS-CDMA and Filtered Multitone (FMT). / QC 20101108 MIMO adaptive modulation power allocation spectral efficiency CSI Annan elektroteknik och elektronik
79	Software Defined Radio (SDR) based sensing Dahal, Ajaya 10 May 2024 (has links) (PDF) The history of Software-Defined Radios (SDRs) epitomizes innovation in wireless communication. Initially serving military needs, SDRs swiftly transitioned to civilian applications, revolutionizing communication. This thesis explores SDR applications such as Spectrum Scanning Systems, Contraband Cellphone Detection, and Human Activity Recognition via Wi-Fi signals. SDRs empower Spectrum Scanning Systems to monitor and analyze radio frequencies, optimizing spectrum allocation for seamless wireless communication. In Contraband Cellphone Detection, SDRs identify unauthorized signals in restricted areas, bolstering security efforts by thwarting illicit cellphone usage. Human Activity Recognition utilizes Raspberry Pi 3B+ to track movement patterns via Wi-Fi signals, offering insights across various sectors. Additionally, the thesis conducts a comparative analysis of Wi-Fi-based Human Activity Recognition and Radar for accuracy assessment. SDRs continue to drive innovation, enhancing wireless communication and security in diverse domains, from defense to healthcare and beyond.
80	4G LTE : eMBMS with MBSFN Service Simulation using OPNET Walid, Abdelrahman January 2014 (has links) Long Term Evolution (LTE) known in the market as 4G LTE, it is an evolution of the GSM/UMTS standard. The overall aim of LTE was to provide a new radio access technology focusing on packet-switched data only. LTE has provided a new peak download rates, low data transfer latencies, and improved the support for mobility. 3Th Generation Partnership Project (3GPP) specialized that LTE released 10 and beyond known as LTE-advanced it is the second evolution of LTE. It has some services such as Coordinated Multipoint Transmission and Reception (CoMP), evolved Multimedia Broadcast and Multicast Service (eMBMS) with Multicast-Broadcast Single-Frequency Network (MBSFN). The development still continuous on LTE-advanced, it is intended to meet the requirement of advanced application that will become common in the wireless marketplace in future. The goals of this project is to simulate one of LTE-A services on LTE standard such as CoMP or/and eMBMS with MBSFN using OPENT LTE, and measure some statistic such as spectral efficiency and also some other statistics, describe centralization vs. decentralization in LTE, and synchronization in the base station in LTE. OPNET LTE support eMBMS with MBSFN, and don’t support CoMP, the simulation has been done by using eMBMS with MBSFN. Finally the objectives of the project has achieved, the result show that when eMBMS with MBSFN is implemented the throughput increased in the downlink to about 5.52 Mbps and in the uplink to about 5.18 Mbps, and also the system spectral efficiency increased in eNB1 from about 10.25 (bits/s/Hz/cell) to about 13.75 (bits/s/Hz/cell) and in eNB2 from about 10.25 (bits/s/Hz/cell) to about 17.25 (bits/s/Hz/cell). The project also answers if it is possible to have centralization in LTE, describe synchronization in the base station in LTE, and if OPNET is useful for big research. 3G 3GPP 4G CoMP CSI CSI-IM CSI-RS eMBMS eNB EPC EPS E-UTRAN GSM HSPA IGMP IGRP ITU-T LTE LTE-A MAC MBSC MBSFN MCE MCS MFN MME OFDM OFDMA OPNET OSPF PDN-GW PDSCH PMCH PUCCH PUSCH QoS SAE SC-FDMA S-GW TDD TD-SCMDA UE UTMS WCDMA. Computer Engineering Datorteknik

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