Carbon nanotubes (CNTs) have gathered a lot of interest because of their extraordinary mechanical, electrical and thermal properties and have potential applications in a wide variety of areas such as material-reinforcement and nano-electronics. The properties of nanotubes are dependent on their diameter and methods for determining this using atomic force microscopy (AFM) in tapping mode assume that the measured height of the tubes represent the real diameter. Based on early, faulty calculations, the forces in tapping mode were assumed to be much lower than in contact mode, however it was later shown that forces in tapping mode can at point of impact rival the forces present in contact mode. This means that there is a potential risk of tube deformation during tapping mode measurements, resulting in incorrectly determined diameters. This work studies CNTs deposited on a silicon-substrate to analyze the effect of three common AFM settings (tapping frequency, free oscillation amplitude and setpoint) to determine their effect on measured CNT diameters and recommendations for choosing settings are given. / Kolnanorör har skapat mycket intresse på grund av sina extraordinära mekaniska, elektriska och termiska egenskaper och har lovande tillämpningar inom en mängd olika områden så som materialförstärkning och nanoelektronik. Kolnanorörens egenskaper påverkas kraftigt av deras diameter och de metoder som använder sig av atomkraftsmikroskopi(AFM) för att mäta diametern hos rören antar att den höjd-data man får fram är ett bra mått på den verkliga diametern hos rören. Baserat på tidiga, felaktiga beräkningar, antog man att kraften i ’tapping mode’ skulle vara mycket lägre än i ’contact mode’ vilket skulle leda till att man inte deformerar ytan man undersöker. Senare forskning visade att kraften mellan spets och prov kan vara lika stor eller rentutav större i tapping mode än i contact mode under det ögonblick då spetsen slår ner i provytan. Det medför att det finns en potentiell risk för att man deformerar kolnanorören när man mäter på dom vilket skulle resultera i att man får felaktiga värden på deras diametrar. Under det här projektet har kolnanorör som placerats på ett kisel-substrat undersökts för att analysera hur tre vanliga inställningar hos AFMet påverkar de erhållna värdena för diametern hos kolnanorören. De tre inställningarna som testats är svängnings-frekvensen, svängnings-amplituden i luft och börvärdet hos svängnings-amplituden.

The subject of this study is the policing of the drug problem during the period between the nationalization of the police force in 1965 and the introduction of imprisonment as a penalty for drug consumption in 1993. The influence of four key factors are discussed: legislation, organization, the conception of and the attention paid to the drug problem. Qualitative and quantitative data from police archives, the prosecutor general, parliamentary publications, a public TV newsroom and various statistics from other sources are combined. The analysis shows four important stages in the process towards a substantially increased drug control: By the end of the 1960s, all data indicate increased attention to the drug problem. The penal law on narcotics was passed in 1968. It laid the foundation for subsequent policing activities. The police was also given increased possibilities to use telephone-tapping to combat serious crimes. By the end of the 1970s, the creation of a special narcotics police organization at the medium level of police hierarchy institutionalized, emphasized and assigned manpower to combat serious crimes. Since the beginning of the 1980s new target groups have been added. The "street dealer" is a new direct target. With the strengthening of the preventive role of the police new indirect target groups emerged: the police also emphasized their work against recruitment of new drug users. The main objective of the new penal law on narcotics of 1968 was to help drug addicts recover and merge back in society again. Addiction was seen as a disease. Drug dealing by the addicts was reprehensible but not a priority matter to the police. Over time, this attitude changed and in 1989 the police saw distinct actions against street dealers as the most important element in the repressive policy.

In der vorliegenden Arbeit wird die Entwicklung von ausschließlich elektrostatisch arbeitenden Sensor-Aktor-Arrays zur Oberflächenprofilbestimmung an Mikroteilen beschrieben. Ein wesentliches Merkmal der Strukturen ist ihr großer Eigenzustellbereich von bis zu 20 Mikrometer. Die Auswertung atomarer Kräfte ermöglicht Wegauflösungen im Nanometerbereich. Auf Grund der geringen Abmessungen durch die mikromechanische Fertigung des Sensorelements und der integrierten Sensor-Aktorfunktion sind Anordnungen als Zeilenarray möglich. Die Entwicklung richtet sich auf Strukturen, welche in klassischer Oberflächentechnologie gefertigt werden können. Durchgeführte experimentelle Tests wurden mit Sensoren in Silizium-bulk-Mikromechanik (SCREAM) realisiert. Der Schwerpunkt der Arbeit behandelt die Charakterisierung der Sensorelemente und damit verbundene Layoutverbesserungen, wie das Einbringen von Feldstoppern und die Nutzbarkeit des Sensors zur Profilbestimmung von Oberflächen unter Beachtung industrieller Anforderungen. Vorteile des Einsatzes eines solchen Sensor-Aktor-Arrays liegen in der Miniaturisierung und dem vergleichsweise großen Eigenzustellbereich jedes einzelnen Sensors. Dadurch ist es möglich, technische Oberflächen, welche im Eigenzustellbereich des Sensorarrays liegen, ohne das Nachregeln einer übergeordneten Positioniereinheit im Profil zu bestimmen. Es wird gezeigt, wie die angewandte kapazitive Wirkungsweise des Sensors mit den sehr kleinen Nutzkapazitäten im Beisein von großen Parasitärkapazitäten zur Signalauswertung genutzt werden kann.

Functional magnetic resonance imaging (fMRI) is a widely used, noninvasive technique to map brain activation, and has provided considerable insight into human brain function over the past two decades. Until recently, fMRI studies have focused on gray matter; however, reports of fMRI activation in white matter are mounting. White matter fMRI activation has the potential to greatly expand the breadth of brain connectivity research, as well as improve the assessment and diagnosis of white matter and connectivity disorders. Despite these potential benefits, white matter fMRI activation remains controversial. The controversy is partially due to the existence of incompletely understood facets of fMRI signals in white matter. This thesis describes three experiments that aim to refine what is currently known about white matter fMRI activation. In the first experiment, one of the main concerns about fMRI activation in white matter was addressed; namely, whether white matter has sufficient cerebrovascular reactivity to support hemodynamic changes that can be measured with fMRI. It was demonstrated that white matter has the capacity to support detectable hemodynamic changes in the absence of partial volume effects. In the second experiment, the effect of static magnetic field strength on sensitivity to white matter fMRI activation was explored as a possible cause of the relative paucity of reports of white matter fMRI activation. The results showed greater sensitivity to white matter fMRI activation at 4 T relative to 1.5 T MRI. In the third experiment, the relationship between white matter activation and the activated network of gray matter regions was explored. This was accomplished using fMRI-guided tractography in which structural connections between activated clusters are evaluated. Structural connectivity between white matter fMRI activation and regions of gray matter activation was demonstrated, providing evidence of the functional significance of fMRI activation in white matter. These experiments provide important insights, which will allow for improved investigations of white matter fMRI activation in the future. In addition, it is posited that experimenter bias, via selective reporting of activation clusters, has contributed to the slow acceptance of fMRI activation in white matter.

In this thesis work several manufacturing methods for graphene is discussed followed by an indepth study of graphene grown by a high temperature sublimation method (sublimation of siliconcarbide). The graphene surfaces studied have been grown by Graphensic AB, both graphenegrown on the Si-face and the C-face of the silicon carbide were studied. Six graphene samplesgrown 4H-SiC substrates were examined for homogeneity and surface morphology as well assome surface roughness parameters using Atomic Force Microscopy (AFM). The graphene wasstudied to get a better understanding of the surfaces and the growth mechanisms to improvemanufacturing parameters while also being informative for graphene sample customers. Anadditional graphene sample grown on 6H-SiC epitaxial layer was also studied to get a betterunderstanding of the sublimation mechanism. If graphene could be manufactured in a cheaprepeatable way the applications are endless and a new era of technology could emerge muchlike the silicon era that began several decades ago. In this thesis work the results are presentedas topography images as well as tables and histograms in the results section. The growth onthe Si-face is found to be well ordered when compared to the C-face which shows signs of alargely complex growth. The graphene on the Si-face lies on top of silicon carbide steps like acarpet with a buer layer interface against the silicon carbide. On the C-face this buer layeris not present but the graphene is deformed by buckling which is suspected to originate fromdierences in thermal properties between the graphene and the C-face. The in uence of AFMsettings for characterization of graphene while using intermittent mode have been evaluated andrecommendations are given. Finally a method for evaluating the homogeneity of the graphenelm is proposed but is in need of further verication.

Made available in DSpace on 2016-12-06T17:07:09Z (GMT). No. of bitstreams: 1 RESUMO ABSTRACT.pdf: 25370 bytes, checksum: 5b120771fc63247ef1adb0d605d4434f (MD5) Previous issue date: 2005-07-20 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / This study evaluates the relationship between growth and development of a motor skill in children who practice basketball and indoor soccer from the ages of 6 to 13 years old, by means of a new protocol originated from the EUROFIT Tapping Plate test. 59 children from the ages of 6 to 13 years old took part in the present causal-comparative and correlational research, who were divided into two groups: 31 basketball practicers (18 boys and 13 girls) and 28 boys indoor soccer practicers. All the children were submitted to measuring arms breadth, application of the test for diagnosis of hand preference and application of the Tapping Plate test in two different forms: the first one was employed in accordance with the distance established in 80 cm and the time of accomplishment for the 25 cycles (T1) was verified, the second one was employed in accordance with the distance adjusted in relation to the age and the pre-established time of 20 seconds (T2). Descriptive statistics was used for the data analysis, the T- test of Student for the independent samples and linear correlation of Pearson. The results indicate that, in relation to arms breadth there is no significant difference between boys and girls from basketball, but there is a difference between boys from the two modalities. In relation to the performance in the tests T1 and T2, the girls from basketball performed better than the boys who, in turn, performed better than the indoor soccer boys. The data indicated low to moderate correlation between arms breadth and the performance in test T1, for p < 0,01 and low to moderate correlation between arms breadth and performance in test T2, for p <0,05, indicating significance in relation to the girls from the basketball and the boys from indoor soccer. This finding allows the inference that the new protocol (T2) evaluated with better reliability the relationship between growth and motor development than T1, which suggests to the manager of the Tapping Plate test that an adjustment of the distances between the signs should be made in accordance with the children s age group, considering the same group of subjects or between subjects who present a similar cultural background. In general, the data demonstrate a moderate correlation between T1 and T2, which enables the validity of the new protocol, proposing an alternate option to the traditional test to measure the speed of superior members. / Avalia a relação entre crescimento e desempenho de uma habilidade motora em crianças praticantes de basquete e futsal entre 6 a 13 anos de idade, por meio de um novo protocolo oriundo do teste de Golpeio de Placas do EUROFIT. Participaram desta pesquisa causal-comparativa e correlacional, 59 crianças de 6 a 13 anos de idade, divididas em dois grupos: 31 praticantes de basquete (18 meninos e 13 meninas) e 28 meninos praticantes de futsal. Todas as crianças foram submetidas à mensuração da envergadura, aplicação do teste para diagnóstico de preferência da mão e aplicação do teste de Golpeio de Placas de duas formas diferentes: a primeira foi aplicada conforme a distância fixada em 80 cm e verificado o tempo de execução para 25 ciclos (T1) e a segunda forma foi aplicada de acordo com distância ajustada em função da idade e tempo pré-fixado em 20 segundos (T2). Para o tratamento dos dados utilizou-se a estatística descritiva, teste t de Student para amostras independentes e correlação linear de Pearson. Os resultados indicaram que, em relação ao tamanho da envergadura, não há diferença significativa entre os meninos e as meninas do basquete, mas há diferença entre os meninos das duas modalidades. Quanto ao desempenho nos testes T1 e T2, as meninas do basquete tiveram desempenho melhor do que os meninos do basquete e esses foram melhores do que os meninos do futsal. Os dados apontaram correlação baixa a moderada entre o tamanho da envergadura e o desempenho no teste T1, para p < 0,01 e correlação baixa a moderada entre o tamanho da envergadura e o desempenho no teste T2, para p < 0,05, indicando significância nas meninas do basquete e nos meninos do futsal. Esse fato permite inferir que o novo protocolo (T2) avaliou com maior fidedignidade a relação entre crescimento e desempenho motor do que o T1, sugerindo assim que, ao administrar o teste de Golpeio de Placas, se faça o ajuste das distâncias entre as placas de acordo com a faixa etária da criança, considerando um mesmo grupo de sujeitos ou entre sujeitos que apresentam aspecto cultural similar. No geral, os dados apontaram uma correlação moderada entre T1 e T2, podendo-se considerar que o novo protocolo é válido, sugerindo assim, uma forma opcional ao teste tradicional para medir a velocidade de membros superiores.

Syftet med mitt arbete är att ta reda på och förklara vad fingerstyle respektive modern fingerstyle är. Jag gjorde det genom att analysera och spela utvald musik från genren modern fingerstyle. Efter analysen komponerade jag en låt med flera speltekniska komponenter som jag anser definierar genren modern fingerstyle. Jag kom under arbetes gång underfund med att fingerstyle är en gitarrteknik som beskriver ett sätt man spelar gitarr på. Modern fingerstyle beskriver en genre där speciella tekniker och ett progressivt sound har en central roll. Jag lärde mig flera moderna tekniker som var helt okända för mig innan arbetets start. Jag lärde mig också att skriva en låt på ett snabbare sätt än jag är van vid, eftersom jag redan innan komponeringsstarten bestämde vissa parametrar som skulle vara med i låten. Mitt arbete kan ge utökad information till den som vill veta vad fingerstyle och modern fingerstyle är.

The topic of this thesis is divided in two main parts. The first is about the “tool/workpiece pair” method and the second is related to wear monitoring. The entire project will be about drilling and tapping operations done in SNECMA Vernon. In fact, the part is very expensive so they have to be closely controlled to avoid a maximum scrap pieces. Two software will be used to control it. Firstly, the “tool/workpiece pair” will be done through AMC3 (software developed at the ENSAM). And secondly the wear monitoring will be ensured by the software CTM Visu (developed by ARTIS). My task will be to learn how to use those software and then to implement them in the company.

In der vorliegenden Arbeit wird die Entwicklung von ausschließlich elektrostatisch arbeitenden Sensor-Aktor-Arrays zur Oberflächenprofilbestimmung an Mikroteilen beschrieben. Ein wesentliches Merkmal der Strukturen ist ihr großer Eigenzustellbereich von bis zu 20 Mikrometer. Die Auswertung atomarer Kräfte ermöglicht Wegauflösungen im Nanometerbereich. Auf Grund der geringen Abmessungen durch die mikromechanische Fertigung des Sensorelements und der integrierten Sensor-Aktorfunktion sind Anordnungen als Zeilenarray möglich. Die Entwicklung richtet sich auf Strukturen, welche in klassischer Oberflächentechnologie gefertigt werden können. Durchgeführte experimentelle Tests wurden mit Sensoren in Silizium-bulk-Mikromechanik (SCREAM) realisiert. Der Schwerpunkt der Arbeit behandelt die Charakterisierung der Sensorelemente und damit verbundene Layoutverbesserungen, wie das Einbringen von Feldstoppern und die Nutzbarkeit des Sensors zur Profilbestimmung von Oberflächen unter Beachtung industrieller Anforderungen. Vorteile des Einsatzes eines solchen Sensor-Aktor-Arrays liegen in der Miniaturisierung und dem vergleichsweise großen Eigenzustellbereich jedes einzelnen Sensors. Dadurch ist es möglich, technische Oberflächen, welche im Eigenzustellbereich des Sensorarrays liegen, ohne das Nachregeln einer übergeordneten Positioniereinheit im Profil zu bestimmen. Es wird gezeigt, wie die angewandte kapazitive Wirkungsweise des Sensors mit den sehr kleinen Nutzkapazitäten im Beisein von großen Parasitärkapazitäten zur Signalauswertung genutzt werden kann.

An increased share of construction with timber is one possible way of achieving more sustainable and energy-efficient life cycles of buildings. The main reason is that wood is a renewable material and buildings require a large amount of resources. Timber buildings taller than two storeys were prohibited in Europe until the 1990s due to fire regulations. In 1994, this prohibition was removed in Sweden.     Some of the early multi-storey timber buildings were associated with more complaints due to impact sound than concrete buildings with the same measured impact sound class rating. Research in later years has shown that the frequency range used for rating has not been sufficiently low in order to include all the sound characteristics that are important for subjective perception of impact sound in light weight timber buildings. The AkuLite project showed that the frequency range has to be extended down to 20 Hz in order to give a good quality of the rating. This low frequency range of interest requires a need for knowledge of the sound field distribution, how to best measure the sound, how to predict the sound transmission levels and how to correlate numerical predictions with measurements.     Here, the goal is to improve the knowledge and methodology concerning measurements and predictions of low frequency impact sound in light weight timber buildings. Impact sound fields are determined by grid measurements in rooms within timber buildings with different designs of their joist floors. The measurements are used to increase the understanding of impact sound and to benchmark different field measurement methods. By estimating transfer functions, from impact forces to vibrations and then sound pressures in receiving rooms, from vibrational test data, improved possibilities to correlate the experimental results to numerical simulations are achieved. A number of excitation devices are compared experimentally to evaluate different characteristics of the test data achieved. Further, comparisons between a timber based hybrid joist floor and a modern concrete floor are made using FE-models to evaluate how stiffness and surface mass parameters affect the impact sound transfer and the radiation.     The measurements of sound fields show that light weight timber floors in small rooms tend to have their highest sound levels in the low frequency region, where the modes are well separated, and that the highest levels even can occur below the frequency of the first room mode of the air. In rooms with excitation from the floor above, the highest levels tend to occur at the floor levels and in the floor corners, if the excitation is made in the middle of the room above. Due to nonlinearities, the excitation levels may affect the transfer function in low frequencies which was shown in an experimental study. Surface mass and bending stiffness of floor systems are shown, by simulations, to be important for the amount of sound radiated.     By applying a transfer function methodology, measuring the excitation forces as well as the responses, improvements of correlation analyses between measurements and simulations can be achieved / <p>Opponent:Kari, Leif, Professor</p><p>Handledare: Linderholt, Andreas, Lektor</p><p>ProjektProWoodSilent Timber BuildUrban TranquilityBioInnovation FBBB</p><p>Forskningsfinansiär: KK-stiftelsen</p><p>Delarbeten:</p><p>1. Low frequency measurements of impact sound performance in light weight timber frame office buildings</p><p>2. Low frequency sound pressure fields in small rooms in wooden buildings with dense and sparse joist floor spacings</p><p>3. Low Frequency Force to Sound Pressure Transfer Function Measurements Using a Modified Tapping Machine on a Light Weight Wooden Joinst Floor4. Impact evaluation of a thin hybrid wood based joist floor</p>