Atomic defects in solids offer access to atom-like quantum properties without complex trapping methods while displaying a rich physics due to interactions with their solid-state environment. Such properties have made them an advantageous building block for quantum information processing, in particular to construct a quantum network, where information would be encoded in spins and transferred between nodes through photons. Among defects in solids, the negatively charged silicon-vacancy centre in diamond (SiV$^{−}$) has attracted attention for its very promising optical properties for such a network. In this thesis, we investigate the spin properties of the silicon-vacancy centre as a potential spin-photon interface. First, we use resonant excitation of an SiV$^{−}$ centre in an external magnetic field to selectively address different electronic states and analyse the resulting fluorescence. We find evidence of selection rules in the optical transitions revealing that the centre possesses an electronic spin S = 1/2. Making use of the dependence of such selection rules on the applied magnetic field orientation, we resonantly drive two optical transitions forming a $\Lambda$-scheme. In the double resonance condition, we achieve coherent population trapping, whereby the SiV$^{−}$ is pumped into a dark state corresponding to a superposition of the two addressed ground states of opposite spin. This technique allows us to evaluate the coherence time of the dark state and hence of the spin, while demonstrating the possibility of all-optical control of the spin when a $\Lambda$-scheme is available. We then use resonant optical pulses to initialise and read out the spin state of a single SiV$^{−}$. By tuning a microwave pulse into resonance between two ground states of opposite spin, we demonstrate optically detected magnetic resonance. Subsequently, by varying the duration of a resonant microwave pulse, we achieve coherent control of a single SiV$^{−}$ electronic spin. Through Ramsey interferometry, we measure a spin dephasing time of 115 $\pm$ 9 ns. We then investigate interactions of the SiV$^{−}$ with its environment. We analyse the hyperfine interaction of the SiV$^{−}$ spin with the nuclear spin of $^{29}$Si, with a view to taking advantage of the long-lived nuclear spin in the future. We show that single-phonon-mediated excitations between electronic states of the SiV$^{−}$ are the dominant spin dephasing and population decay mechanism and evaluate how external strain alters optical selection rules and can be used to improve the coherence time of the spin.

<p>Under 1980-talets andra halva hade bostadsmarknaden sin storhetstid, många nya bostäder byggdes och antalet vakanser var nästan obefintliga. Till följd av den stora fastighetskraschen som inträffade under tidigt 1990-tal fick många bostadsföretag ekonomiska problem. Många kommunala bostadsföretag fick höga vakanser att arbeta med. För att komma till rätta med dessa problem behövde bostadsföretagen vidta åtgärder och dessa kunde bland annat vara, hyressänkningar och rabatter, marknadsföring, försäljningar, rivningar, ombyggnad och att lägga fastigheter i malpåse. För de mest utsatta kommunerna fanns i slutet av 1990-talet även möjligheten att söka statligt stöd.</p><p>Som en bakgrund till studien ges en förklaring till begreppet vakanser och naturlig vakansgrad, här beskrivs även hur vakanser i vissa fall kan ha uppkommit. Vidare ges en översiktlig beskrivning av hur bostadsmarkanden utvecklats under åren 1986 till 2006 – vad som har påverkat utvecklingen hos de kommunala bostadsföretagen och vad som har inträffat under perioden.</p><p>Syftet har i studien varit att reda ut hur kommuner med höga vakanser har arbetat, om åtgärder vidtagits och i sådana fall vilka. För att undersöka detta har ett urval på 10 kommuner med höga vakanstal gjorts. Dessa kommuner är Arboga, Bräcke, Eda, Fagersta, Karlsborg, Munkedal, Skara, Skellefteå, Surahammar och Överkalix. För att få en tydlig bild av utvecklingen i dessa kommuner har ekonomisk och demografisk statistik noggrant bearbetats.</p><p>Studien visar att alla kommuner som undersökts har vidtagit någon typ av konkret åtgärd för att komma till rätta med sina vakansproblem. Det har även visat sig att alla de kommuner som fått statligt stöd valt åtgärden rivning medan de kommuner som inte sökt stöd haft större benägenhet att även välja andra alternativ. Få kommuner har använt sig av åtgärder som exempelvis olika typer av rabatter och ökad marknadsföring för att fylla de tomma lägenheterna, utan de har istället vidtagit åtgärder som lett till minskning av hela bostadsbeståndet.</p><p>6</p> / <p>During the late 1980’s the Swedish housing market was booming, there were almost no vacancies and the construction of new housing was substantial. The big real estate collapse that occurred in the early 1990’s left many housing companies with economic problems. Many municipality-owned housing associations faced high vacancy rates. To solve their problems the housing associations had to consider a number of measures, including rent reductions and discounts, marketing, selling, demolishing, reconstruction for alternative use and to put properties in mothballs. In the late 1990’s the most exposed municipalities could even apply for Government subsidies.</p><p>As a background, the concepts vacancy rate and natural vacancy, are explained as well as the cause of vacancies in some cases. Furthermore, there is a description of how the housing market developed from 1986 to 2006, what influenced the housing associations and what happened during the period.</p><p>The purpose of this study is to investigate how municipalities with high vacancies have acted to dealing with their problem, if any measures have been taken and if so; what measures? Ten municipalities with high vacancies were examined. These municipalities are Arboga, Bräcke, Eda, Fagersta, Karlsborg, Munkedal, Skara, Skellefteå, Surahammar and Överkalix. To get a clear image of the development in these municipalities economic and demographic statistics have been carefully analysed.</p><p>The study shows that all the municipalities examined have taken some concrete measures to deal with their vacancy problems. All the municipalities that were given Government subsidies have demolished housing properties rather than tried other measures. Few municipalities has used offered rent discounts or applied marketing activities to fill empty apartments. Instead, measures that lead to a reduction of the number of apartments have been used.</p>

Under 1980-talets andra halva hade bostadsmarknaden sin storhetstid, många nya bostäder byggdes och antalet vakanser var nästan obefintliga. Till följd av den stora fastighetskraschen som inträffade under tidigt 1990-tal fick många bostadsföretag ekonomiska problem. Många kommunala bostadsföretag fick höga vakanser att arbeta med. För att komma till rätta med dessa problem behövde bostadsföretagen vidta åtgärder och dessa kunde bland annat vara, hyressänkningar och rabatter, marknadsföring, försäljningar, rivningar, ombyggnad och att lägga fastigheter i malpåse. För de mest utsatta kommunerna fanns i slutet av 1990-talet även möjligheten att söka statligt stöd. Som en bakgrund till studien ges en förklaring till begreppet vakanser och naturlig vakansgrad, här beskrivs även hur vakanser i vissa fall kan ha uppkommit. Vidare ges en översiktlig beskrivning av hur bostadsmarkanden utvecklats under åren 1986 till 2006 – vad som har påverkat utvecklingen hos de kommunala bostadsföretagen och vad som har inträffat under perioden. Syftet har i studien varit att reda ut hur kommuner med höga vakanser har arbetat, om åtgärder vidtagits och i sådana fall vilka. För att undersöka detta har ett urval på 10 kommuner med höga vakanstal gjorts. Dessa kommuner är Arboga, Bräcke, Eda, Fagersta, Karlsborg, Munkedal, Skara, Skellefteå, Surahammar och Överkalix. För att få en tydlig bild av utvecklingen i dessa kommuner har ekonomisk och demografisk statistik noggrant bearbetats. Studien visar att alla kommuner som undersökts har vidtagit någon typ av konkret åtgärd för att komma till rätta med sina vakansproblem. Det har även visat sig att alla de kommuner som fått statligt stöd valt åtgärden rivning medan de kommuner som inte sökt stöd haft större benägenhet att även välja andra alternativ. Få kommuner har använt sig av åtgärder som exempelvis olika typer av rabatter och ökad marknadsföring för att fylla de tomma lägenheterna, utan de har istället vidtagit åtgärder som lett till minskning av hela bostadsbeståndet. 6 / During the late 1980’s the Swedish housing market was booming, there were almost no vacancies and the construction of new housing was substantial. The big real estate collapse that occurred in the early 1990’s left many housing companies with economic problems. Many municipality-owned housing associations faced high vacancy rates. To solve their problems the housing associations had to consider a number of measures, including rent reductions and discounts, marketing, selling, demolishing, reconstruction for alternative use and to put properties in mothballs. In the late 1990’s the most exposed municipalities could even apply for Government subsidies. As a background, the concepts vacancy rate and natural vacancy, are explained as well as the cause of vacancies in some cases. Furthermore, there is a description of how the housing market developed from 1986 to 2006, what influenced the housing associations and what happened during the period. The purpose of this study is to investigate how municipalities with high vacancies have acted to dealing with their problem, if any measures have been taken and if so; what measures? Ten municipalities with high vacancies were examined. These municipalities are Arboga, Bräcke, Eda, Fagersta, Karlsborg, Munkedal, Skara, Skellefteå, Surahammar and Överkalix. To get a clear image of the development in these municipalities economic and demographic statistics have been carefully analysed. The study shows that all the municipalities examined have taken some concrete measures to deal with their vacancy problems. All the municipalities that were given Government subsidies have demolished housing properties rather than tried other measures. Few municipalities has used offered rent discounts or applied marketing activities to fill empty apartments. Instead, measures that lead to a reduction of the number of apartments have been used.

Este trabalho estuda a presença acentuada da vacância imobiliária e suas relações com a dinâmica urbana na área central de São Paulo. Para tanto, são verificadas as diversas formas de tratamento da vacância. A análise é completada com um breve histórico do desenvolvimento urbano da cidade. O cenário atual o cenário atual da área central é descrito através das características específicas do mercado imobiliário, da demanda, da atuação dos diversos agentes urbanos e da presença das ocupações organizadas. A metodologia utilizada inclui entrevistas com agentes ligados ao mercado imobiliário, e uma pesquisa de campo, apoiada em um plano amostral estratificado, por meio da qual se obtém a estimativa da vacância para os distritos Sé e República. Como resultado final do estudo, apontam-se os fatores do crescimento e permanência dos espaços edificados vazios na cidade de São Paulo. / This work studies the excess vacancy and its relations to the urban dynamics in downtown São Paulo. Several forms of dealing with the problem of vacancy are explored, and analysed within the context of a brief historical description of the urban development of the city. The present scenario of the central urban area is described, showing the characteristics of the real estate market, the demand on buildings, the performance of different urban agents, and the organized occupation of housing spaces. The methodology used includes interviews with agents related to the real estate market, and a survey based on a stratified sampling technique, to estimate vacancies in the districts of Sé and República. Finally, the factors leading to the uprising and persistence of vacant buildings in the central area of São Paulo are pointed out.

Fast oxide-ion and proton conductors are the subject of considerable research due to their technological applications in sensors, ceramic membranes and solid oxide fuel cells (SOFCs). This thesis describes the use of computer modelling techniques to study point defects, dopants and clustering effects in fluorite-and perovskitetype ion conductors with potential SOFC applications. Bi2O3 related phases are being developed with the objective of high oxide-ion conductivities at lower operating temperatures than 1000°C, as in current generation SOFC electrolytes. Doped Bi2O3 phases have shown promise as materials capable of accomplishing this goal. First, the Y-doped phase, Bi3YO6, has been investigated including the ordering of intrinsic vacancies. The defect and dopant characteristics of Bi3YO6 have been examined and show that a highly mobile oxygen sub-lattice exists in this material. A preliminary structural modelling study of a new Re-doped Bi2O3 phase was also undertaken. A comprehensive investigation of the proton-conducting perovskites BaZrO3, BaPrO3 and BaThO3 is then presented. Our results suggest that intrinsic atomic disorder in BaZrO3 and BaThO3 is unlikely, but reduction of Pr4+ in BaPrO3 is favourable. The water incorporation energy is found to be less exothermic for BaZrO3 than for BaPrO3 and BaThO3, but in all cases the results suggest that the proton concentration would decrease with increasing temperature, in accord with experimental data. The high binding energies for all the dopant-OH pair clusters in BaPrO3 and BaThO3 suggest strong proton trapping effects. Finally, a study of multiferroic BiFeO3 is presented, in which the defect, dopant and migration properties of this highly topical phase are investigated. The reduction process involving the formation of oxygen vacancies and Fe2+ is the most favourable redox process. In addition, the results suggest that oxide-ion migration is anisotropic within this system.

No description available.

Doctor of Philosophy(PhD) / This project focuses on the examination of the structures of lanthanide containing double perovskites of the type Ba2LnB'O6-d (Ln = lanthanide or Y3+ and B' = Nb5+, Ta5+, Sb5+ and/or Sn4+) using synchrotron X-ray and neutron powder diffraction. The first part of this project examined the relative stability of R3 rhombohedral and I4/m tetragonal structures as the intermediate phase adopted by the series Ba2LnB'O6 (Ln = lanthanide (III) or Y3+ and B' = Nb5+, Ta5+ or Sb5+). It was found that I4/m tetragonal symmetry was favoured when B' was a transition metal with a small number of d electrons, such as Nb5+ or Ta5+. This is due to the presence of p-bonding in these compounds. In the Ba2LnNbO6 and Ba2LnTaO6 series R3 rhombohedral symmetry was, however, favoured over I4/m tetragonal symmetry when Ln = La3+ or Pr3+ due to the larger ionic radius of these cations. The incompatibility of the d0 and d10 B'-site cations in this family of compounds was indicated by significant regions of phase segregation in the two series Ba2Eu1-xPrxNb1-xSbxO6 and Ba2NdNb1-xSbxO6. In the second part of this project the compounds in the series Ba2LnSnxB'1-xO6-d (Ln = Pr, Nd or Tb and B' = Nb5+ or Sb5+) were examined to understand the relative stability of oxygen vacancies in these materials compared to the oxidation of the lanthanide cations and to determine if any oxygen vacancy ordering occurred. It was found, using a combination of structural characterisation, X ray Absorption Near Edge Structure and Ultra-Violet, Visible and Near Infrared spectroscopies, that with Ln = Pr or Tb increased Sn4+ doping results in a change in the oxidation state of the Ln3+ cations to Ln4+. This leads to those series containing little or no oxygen vacancies. A loss of B site cation ordering was found to accompany this oxidation state change and phase segregation was found to occur in the Ba2PrSnxSb1-xO6-d series most likely due to the Pr3+ and Pr4+ cations segregating into different phases. The Nd3+ cations in the series Ba2NdSnxSb1-xO6-d, however, can not oxidise to the tetravalent state so the number of oxygen vacancies rises with increasing x. It was found that oxygen vacancies concentrate onto the axial site of the compounds with x = 0.6 and 0.8 at ambient temperature. In Ba2Sn0.6Sb0.4O5.7 the oxygen vacancies were found to change to concentrating on the equatorial site at higher temperatures and it is suggested that this oxygen vacancy ordering plays a role in the adoption of I2/m monoclinic symmetry.

近年來大量的就業人口都是利用辦公室的生產者，例如美國在70年代有25%的新進工作人員在辦公室進行工作，而至80年代更提高至27%。在此種狀況下，就臺灣地區而言，大型現代化辦公大樓的需求必然會逐漸強烈，尤其在跨國性的旅行、信託（保險）公司、專業服務性公司的不斷地在台灣設立分據點之後，對高品質辦公大樓的需求必然會持續增加，另外在國際性企業大量「進出」台灣後，未來不動產市場的兩大趨勢：一是大型現代化辦公大樓勢將不足，特別是擁有自動化系統的辦公大樓將嚴重缺乏；二是申小型及老舊的辦公市場將會停滯。特別是臺北都會區為臺灣地區的政經中心，具有吸引辦公大樓集中此地的客觀要件。，況且辦公大樓的供需有時間落差，一旦不動產市場景氣有所變化，辦公大樓的供需便產生失調，使得空閒率上升或是供不應求，形成資源浪費，因此制定合理的供需模式，進行都會區的前程規劃，使有限的土地資源得以合理的利用，以維持都會的成長。 　　本論文共有六章，內含二十一節，相關內容如下： 　　第壹章：含研究動機、目的、流程、方法及研究範圍之說明。 　　第貳章：針對辦公大樓與聚集經濟以及國外研究辦公大樓供需模式之相關文獻予收集整理，以為理論分析之基礎。 　　第參章：將辦公大樓市場運作的過程進行模擬，並對影響辦公大樓供需之因子分別加以探討，配合存貨調整模型，解決理想與期望之間的差益。 　　第肆章：將目前台北都會區辦公大樓之實況予清析之描述，使理論與實際狀況互相調整其差益異點。 　　第伍章：由理論模式之觀點截取所須之市場性資料，配合VAR之動態迴歸模型進行辦公大樓的實證分析。 　　第陸章：綜合前文之分析，提出本研究之結論與建議。 / In recent years,many new employees are work in office.For ex ample,in American there are 25% new employees are work in office in 70',and in 80',the office's employment rate became 27% . In T aiwan ,modern office building's demand will become graduate stro ng year for year. Because many international cooperation set bra nches in Taiwan. In future, office building' s development has fa ce tow conditions;the first is modern and large scale office wil l lack of the necessary ,the others is old type office will rebu ilt or depreciation. Especial Taipei is the capital of Taiwan an d lack of land, In these years, real estate's price arise too hi gh. Many manufacturing plant can not offer higher rent so plant move out. This situation make damage to Taiwan's economy develop ment, so the urban planning department need preplanning with oth er land use. In order to get the goal of equal rughts.

This thesis consists of two separate parts. The first part consists of one paper and considers problems concerning spatial point processes and the second part includes three papers in the field of bioinformatics. The first part of the thesis is based on a forestry problem of estimating the number of trees in a region by using the information in an aerial photo, showing the area covered by the trees. The positions of the trees are assumed to follow either a binomial point process or a hard-core Strauss process. Furthermore, discs of equal size are used to represent the tree-crowns. We provide formulas for the expectation and the variance of the relative vacancy for both processes. The formulas are approximate for the hard-core Strauss process. Simulations indicate that the approximations are accurate.  The second part of this thesis focuses on pre-processing of microarray data. The microarray technology can be used to measure the expression of thousands of genes simultaneously in a single experiment. The technique is used to identify genes that are differentially expressed between two populations, e.g. diseased versus healthy individuals. This information can be used in several different ways, for example as diagnostic tools and in drug discovery. The microarray technique involves a number of complex experimental steps, where each step introduces variability in the data. Pre-processing aims to reduce this variation and is a crucial part of the data analysis. Paper II gives a review over several pre-processing methods. Spike-in data are used to describe how the different methods affect the sensitivity and bias of the experi­ment. An important step in pre-processing is dye-normalization. This normalization aims to re­move the systematic differences due to the use of different dyes for coloring the samples. In Paper III a novel dye-normalization, the MC-normalization, is proposed. The idea behind this normaliza­tion is to let the channels’ individual intensities determine the cor­rection, rather than the aver­age intensity which is the case for the commonly used MA-normali­zation. Spike-in data showed that  the MC-normalization reduced the bias for the differentially expressed genes compared to the MA-normalization. The standard method for preserving patient samples for diagnostic purposes is fixation in formalin followed by embedding in paraffin (FFPE). In Paper IV we used tongue-cancer micro­RNA-microarray data to study the effect of FFPE-storage. We suggest that the microRNAs are not equally affected by the storage time and propose a novel procedure to remove this bias. The procedure improves the ability of the analysis to detect differentially expressed microRNAs.

It is my hope that this thesis may serve as a guide for future students wishing to build a microscope from scratch. The design and construction of a scanning, confocal fluorescence microscope equipped with shaped microwave excitation is detailed. The use of the microscope is demonstrated by coherently manipulating single Nitrogen-Vacancy centres in diamond. Further the instrument is used to investigate a dual Halbach array magnet system.