Global ETD Search

1	Modelování diferenčního proudového zesilovače / Modelling of differential current amplifier Polák, Josef January 2013 (has links) The aim of my diploma thesis was programming of systems for measuring AC, DC and impedance measurements. Each measuring system measures selected characteristics of current amplifier with controllable amplification DACA_N. Control programs I have created in Agilent VEE Pro 9.2. The measured data are stored to executable files in MS Excel for further processing. With created measurement programs I made measurements of eight current amplifiers. The results of individual measurements I compiled into graphs and compared with each other circuit characteristics of amplifiers. Then there is described controlling and connection of current amplifier and its construction. At the end the diploma thesis describes amplifiers with the worst and the best measured circuit characteristics. The measured values show that the amplifier DACA_N with slight differences works by theoretical assumptions and measurement systems suggested by me work with no problem.
2	Confidence intervals for population size based on a capture-recapture design Hua, Jianjun January 1900 (has links) Master of Science / Department of Statistics / Paul I. Nelson / Capture-Recaputre (CR) experiments stemmed from the study of wildlife and are widely used in areas such as ecology, epidemiology, evaluation of census undercounts, and software testing, to estimate population size, survival rate, and other population parameters. The basic idea of the design is to use “overlapping” information contained in multiple samples from the population. In this report, we focus on the simplest form of Capture-Recapture experiments, namely, a two-sample Capture-Recapture design, which is conventionally called the “Petersen Method.” We study and compare the performance of three methods of constructing confidence intervals for the population size based on a Capture-Recapture design, asymptotic normality estimation, Chapman estimation, and “inverting a chi-square test” estimation, in terms of coverage rate and mean interval width. Simulation studies are carried out and analyzed using R and SAS. It turns out that the “inverting a chi-square test” estimation is better than the other two methods. A possible solution to the “zero recapture” problem is put forward. We find that if population size is at least a few thousand, two-sample CR estimation provides reasonable estimates of the population size. Capture-recapture Confidence interval Population size Asymptotic normality estimation Inverting a test Coverage rate Statistics (0463)
3	Inverting Electrode: Does Location Affect MMN Presence? Walker, Letitia J., Stuart, Andrew, Elangovan, Saravanan 01 January 2006 (has links) No description available. inverting electrode electrophysiological measures MMN audiology speech language pathology Audiology and Speech-Language Pathology Communication Sciences and Disorders
4	Backsides / interiors : Tracing a treatment of backsides in domestic interiors Jacobsen, Hanna-Lydia January 2018 (has links) Interiors are often dealing with the notion of front and back. Physically, with walls facing the occupant and concealing a “behind”, a backside, perhaps an adjacent room. But also, in organization; “in the back of the building” meaning the furthest away from the entrance or from the street, the public. There is also a variety of interiors that are backsides them self. Spaces that, in contrast to fronts or “primary” spaces not are intended to be shown perhaps because they are occupied by functions, or people that for some reason are desired to be hidden. The idea of a backside, though, whether considered good or bad, what belongs there and not, has shifted over time. I believe that this is a truly cultural issue, governed by social constructions that stabilize and become customs in the fabrication of interiors. In this project have I studied and reworked the information from a few domestic interiors. Through the methods of inverting and full-scale construction, have I investigated what a “backside of an interior” is, what it does and how the treatment of it has changed over time. In my studies, I have found that a contemporary apartment interior attempts to seamlessly exclude the “backside”, just like the parlours of a 100 years old bourgeoise palace. But in the contemporary apartment, it is because of praxis and standardization, and not because of what ideas govern the design. By building a full-scale part of an actual contemporary apartment - where I invert and reorganize the order of how it would have been costume - the praxis is brought to light and questioned. spatial design backside inverting domestic interior full scale wall corner detail servant served mock-up crack Design Design
5	Adaptabilní obrazový A/D převodník / Adaptable video A/D converter Maňas, Stanislav January 2012 (has links) Master's Thesis deals with the complete proposal of light adaptability A/D converter. In the second chapter there are describes types of sensors. Third one describes the most used methods of light adaptability. In the fourth chapter there is describe the adaptability A/D conversion. Chapter 5 describes the block diagram. In the sixth chapter there is the design of all blocks of A/D converter. Finally in the chapter 7 there are construction documents for realization.
6	Practical And Reliable Wireless Power Supply Design For Low Power Implantable Medical Devices Christopher J Quinkert (9755558) 14 December 2020 (has links) <p>Implantable wireless devices are used to treat a variety of diseases that are not able to be treated with pharmaceuticals or traditional surgery, These implantable devices have use in the treatment of neurological disorders like epilepsy, optical disorders such as glaucoma, or injury related issues such as targeted muscle reinnervation. These devices can rely upon harvesting power from an inductive wireless power source and batteries. Improvements to how well the devices utilize this power directly increase the efficacy of the device operation as well as the device's lifetime, reducing the need for future surgeries or implantations. </p> <p> I have designed an improvement to cavity resonator based wireless power by designing a dynamic impedance matching implantable power supply, capable of tracking with device motion throughout a changing magnetic field and tracking with changing powering frequencies. This cavity resonator based system presents further challenges practically in the turn-on cycle of the improved device. </p> <p> I further design a coil-to-coil based wireless power system, capable of dynamically impedance matching a high quality factor coil to optimize power transfer during steady state, while also reducing turn-on transient power required in dynamic systems by utilizing a second low quality factor coil. This second coil has a broadband response and is capable of turning on at lower powers than that of the high quality factor coil. The low quality factor coil powers the circuitry that dynamically matches the impedance of the high quality factor coil, allowing for low power turn on while maintaining high power transfer at all operating frequencies to the implantable device. </p> <p> Finally, an integrated circuit is designed, fabricated, and tested that is capable of smoothly providing regulated DC power to the implantable device by stepping up from wireless power to a reasonable voltage level or stepping down from a battery to a reasonable voltage level for the device. The chip is fabricated in 0.18um CMOS process and is capable of providing power to the "Bionode" implantable device. </p> Circuits and Systems ASIC Integrated Circuits CMOS Wireless Power Dynamic Impedance Matching Resonant Cavity Buck-Boost Non-Inverting Buck-Boost Low Power DC-DC SMPS
7	Implementations of Fuzzy Adaptive Dynamic Programming Controls on DC to DC Converters Chotikorn, Nattapong 05 1900 (has links) DC to DC converters stabilize the voltage obtained from voltage sources such as solar power system, wind energy sources, wave energy sources, rectified voltage from alternators, and so forth. Hence, the need for improving its control algorithm is inevitable. Many algorithms are applied to DC to DC converters. This thesis designs fuzzy adaptive dynamic programming (Fuzzy ADP) algorithm. Also, this thesis implements both adaptive dynamic programming (ADP) and Fuzzy ADP on DC to DC converters to observe the performance of the output voltage trajectories. Adaptive Dynamic Programming Adaptive Neuro-Fuzzy Inference System ANFIS SEPIC Converter ADP Non-Inverting Buck-Boost Converter Dynamic programming. DC-to-DC converters. Computer algorithms.
8	Zálohovaný napájecí zdroj pro lékařský přístroj s managementem po I2C / Uninterruptible power supply with management system utilizing I2C bus for medical devices Daněček, Vít January 2008 (has links) Object my master’s thesis is the design a Medical device uninterruptible power supply with managment system utilizing I2C bus. Norm EN 61000-3-2 define electric parameters for medical device power supply. In case of power supply for medial equipment is expressive accent on increased electric strength. This power supply have usually primary and secondary power circuit. Primary power circuit form line accumulator, which supplies needed output to the load and recharge reserve battery. Secondary is formed battery-pack, which serve as back-up power supply at drop-out prime circle. They have a minimum weight, small proportions, large overall effectivity also charging battery-pack and monitoring battery-pack charging condition. Result whole those master’s thesis is design Medical device uninterruptible power supply with managment system utilizing I2C bus and realization board layout. Resulting characteristics designed supply unit are: Output voltages are 5V/ 3 A , 12V/ 1,5 A and -12V/ 0,1 A. Managment support information about: Line adapter/ battery pack switch, battery-pack charging condition and actuall tempera-ture battery-pack.
9	Structural Investigation of Processing α-Glucosidase I from Saccharomyces cerevisiae Barker, Megan 20 August 2012 (has links) N-glycosylation is the most common eukaryotic post-translational modification, impacting on protein stability, folding, and protein-protein interactions. More broadly, N-glycans play biological roles in reaction kinetics modulation, intracellular protein trafficking, and cell-cell communications. The machinery responsible for the initial stages of N-glycan assembly and processing is found on the membrane of the endoplasmic reticulum. Following N-glycan transfer to a nascent glycoprotein, the enzyme Processing α-Glucosidase I (GluI) catalyzes the selective removal of the terminal glucose residue. GluI is a highly substrate-specific enzyme, requiring a minimum glucotriose for catalysis; this glycan is uniquely found in biology in this pathway. The structural basis of the high substrate selectivity and the details of the mechanism of hydrolysis of this reaction have not been characterized. Understanding the structural foundation of this unique relationship forms the major aim of this work. To approach this goal, the S. cerevisiae homolog soluble protein, Cwht1p, was investigated. Cwht1p was expressed and purified in the methyltrophic yeast P. pastoris, improving protein yield to be sufficient for crystallization screens. From Cwht1p crystals, the structure was solved using mercury SAD phasing at a resolution of 2 Å, and two catalytic residues were proposed based upon structural similarity with characterized enzymes. Subsequently, computational methods using a glucotriose ligand were applied to predict the mode of substrate binding. From these results, a proposed model of substrate binding has been formulated, which may be conserved in eukaryotic GluI homologs. Biomolecular structure Eukaryotic glycosylation glycosylation N-glycan N-linked glycosylation Carbohydrate biochemistry Inhibitor antiviral therapeutic Structure-based drug design glucosidase glycosidase glycoside hydrolase post-translational modification enzyme enzyme mechanism inverting mechanism structural biology protein structure 6xHis tag Crystal packing sugar substrate X-ray crystallography single anomalous dispersion PHENIX heavy-atom phasing docking autodock autodock vina biophysical methods tryptophan fluorescence glucose oxidase activity assay enzyme inhibition Protein expression Protein purification Pichia pastoris Saccharomyces cerevisiae fondue AOX1 promoter glycoside hydrolysis substrate binding model molecular dynamics molecular dynamics Binding site Active site cleft Endoplasmic reticulum Glycan processing Glycan trimming protein-protein interactions cell-cell communication X-ray diffraction crystallization secreted protein substrate selectivity kojibiose glucotriose miglitol deoxynojirimycin Glc3Man9GlcNAc2 free oligosaccharide species GluI Cwh41 Cwh41p Cwht1p 0306 0307 0760
10	Structural Investigation of Processing α-Glucosidase I from Saccharomyces cerevisiae Barker, Megan 20 August 2012 (has links) N-glycosylation is the most common eukaryotic post-translational modification, impacting on protein stability, folding, and protein-protein interactions. More broadly, N-glycans play biological roles in reaction kinetics modulation, intracellular protein trafficking, and cell-cell communications. The machinery responsible for the initial stages of N-glycan assembly and processing is found on the membrane of the endoplasmic reticulum. Following N-glycan transfer to a nascent glycoprotein, the enzyme Processing α-Glucosidase I (GluI) catalyzes the selective removal of the terminal glucose residue. GluI is a highly substrate-specific enzyme, requiring a minimum glucotriose for catalysis; this glycan is uniquely found in biology in this pathway. The structural basis of the high substrate selectivity and the details of the mechanism of hydrolysis of this reaction have not been characterized. Understanding the structural foundation of this unique relationship forms the major aim of this work. To approach this goal, the S. cerevisiae homolog soluble protein, Cwht1p, was investigated. Cwht1p was expressed and purified in the methyltrophic yeast P. pastoris, improving protein yield to be sufficient for crystallization screens. From Cwht1p crystals, the structure was solved using mercury SAD phasing at a resolution of 2 Å, and two catalytic residues were proposed based upon structural similarity with characterized enzymes. Subsequently, computational methods using a glucotriose ligand were applied to predict the mode of substrate binding. From these results, a proposed model of substrate binding has been formulated, which may be conserved in eukaryotic GluI homologs. Biomolecular structure Eukaryotic glycosylation glycosylation N-glycan N-linked glycosylation Carbohydrate biochemistry Inhibitor antiviral therapeutic Structure-based drug design glucosidase glycosidase glycoside hydrolase post-translational modification enzyme enzyme mechanism inverting mechanism structural biology protein structure 6xHis tag Crystal packing sugar substrate X-ray crystallography single anomalous dispersion PHENIX heavy-atom phasing docking autodock autodock vina biophysical methods tryptophan fluorescence glucose oxidase activity assay enzyme inhibition Protein expression Protein purification Pichia pastoris Saccharomyces cerevisiae fondue AOX1 promoter glycoside hydrolysis substrate binding model molecular dynamics molecular dynamics Binding site Active site cleft Endoplasmic reticulum Glycan processing Glycan trimming protein-protein interactions cell-cell communication X-ray diffraction crystallization secreted protein substrate selectivity kojibiose glucotriose miglitol deoxynojirimycin Glc3Man9GlcNAc2 free oligosaccharide species GluI Cwh41 Cwh41p Cwht1p 0306 0307 0760

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