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1
Vojáček, Cyril. "Rozpoznání obličeje." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2014. http://www.nusl.cz/ntk/nusl-236143.
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This thesis is about face detection and recognition from video. Main emphasis is on computational speed, so it can be used for a real-time processing. Begining of this work focus on different approaches for detection and object recognition. Afterwards is explained the main principle of methods used for the final application. Next part is about design and implementation of this methods and conclusion is about the testing results of designed application.
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Ru, Jifeng. "Adaptive estimation and detection techniques with applications." ScholarWorks@UNO, 2005. http://louisdl.louislibraries.org/u?/NOD,285.
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Thesis (Ph. D.)--University of New Orleans, 2005.Title from electronic submission form. "A dissertation ... in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Engineering and Applied Science"--Dissertation t.p. Vita. Includes bibliographical references.
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Maschio, Maria Celeste. "Performance evaluation of detector for digital radiography." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/8317/.
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Lo scopo di questo lavoro è la caratterizzazione fisica del flat panel PaxScan4030CB Varian, rivelatore di raggi X impiegato in un ampio spettro di applicazioni cliniche, dalla radiografia generale alla radiologia interventistica.
Nell’ambito clinico, al fine di una diagnosi accurata, è necessario avere una buona qualità dell’immagine radiologica mantenendo il più basso livello di dose rilasciata al paziente.
Elemento fondamentale per ottenere questo risultato è la scelta del rivelatore di radiazione X, che deve garantire prestazioni fisiche (contrasto, risoluzione spaziale e rumore) adeguati alla specifica procedura. Le metriche oggettive che misurano queste caratteristiche sono SNR (Signal-to-Noise Ratio), MTF (Modulation Transfer Function) ed NPS (Noise Power Spectrum), che insieme contribuiscono alla misura della DQE (Detective Quantum Efficiency), il parametro più completo e adatto a stabilire le performance di un sistema di imaging. L’oggettività di queste misure consente anche di mettere a confronto tra loro diversi sistemi di rivelazione.
La misura di questi parametri deve essere effettuata seguendo precisi protocolli di fisica medica, che sono stati applicati al rivelatore PaxScan4030CB presente nel laboratorio del Centro di Coordinamento di Fisica Medica, Policlinico S.Orsola.
I risultati ottenuti, conformi a quelli dichiarati dal costruttore, sono stati confrontati con successo con alcuni lavori presenti in letteratura e costituiscono la base necessaria per la verifica di procedure di ottimizzazione dell’immagine radiologica attraverso interventi sul processo di emissione dei raggi X e sul trattamento informatico dell’immagine (Digital Subtraction Angiography).
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Falco, Tony. "MTF, NPS and DQE analysis of portal metal-platefilm detectors." Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=23885.
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Previous studies of modulation transfer function (MTF), noise power spectrum (NPS), and detective quantum efficiency (DQE) of metal-plate/film portal detectors have been performed on limited combinations of front and back metal-plates. We report on these parameters for an extensive set of forty-nine front-back metal-plate combinations. The portal detector consists of a double emulsion RP (Kodak localization therapy) film placed between metal-plates: Al, Cu, brass and Pb of thicknesses varying from 0.30 to 4.80 mm. Radiation sources included a Theratron Co-60 unit, and a Varian Clinac-18 linear accelerator delivering a polyenergetic 10 MV X-ray spectrum. In terms of the absolute efficiency of the detectors, the best DQE is obtained with the detector consisting of a 1.75 mm Cu front plate and a 1.62 mm Al back plate for the Clinac-18, and with the detector consisting of a 0.95 mm Cu front plate and a 0.80 mm Cu or a 1.62 mm Al back plate for the Co-60 gamma ray source.
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Dias, Pedro Carvalhaes 1983. "Um novo sensor de umidade de solo de pulso de calor de alta sensibilidade, baseado em um único transistor bipolar de junção npn = A novel high sensitivity single probe heat pulse soil moisture sensor based on a single npn bipolar junction transistor = A novel high sensitivity single probe heat pulse soil moisture sensor based on a single npn bipolar junction transistor." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/261867.
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Orientador: Elnatan Chagas FerreiraTexto em inglês
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação
Made available in DSpace on 2018-08-20T11:54:01Z (GMT). No. of bitstreams: 1 Dias_PedroCarvalhaes_M.pdf: 7362254 bytes, checksum: dd839cf652cbbda17a2a5d9b6cecbdc3 (MD5) Previous issue date: 2012
Resumo: A constante preocupação em aumentar a produtividade das plantações de uma forma sustentável e otimizando o uso dos insumos agrícolas (água, fertilizantes, pesticidas e produtos para correção do PH) levou ao desenvolvimento da agricultura de precisão, que permite determinar a quantidade correta de insumos para cada região do solo (tipicamente um hectare), evitando o desperdício. Sensores de umidade de solo de baixo custo e fácil aplicação no campo são fundamentais para permitir um controle preciso da atividade de irrigação, sendo que os sensores que melhor atendem estes requisitos são os chamados sensores de dissipação de calor ou sensores de transferência de calor. Estes sensores, entretanto, apresentam um problema de baixa sensibilidade na faixa de umidade mais importante para as plantas (umidade de solo 'teta'v variando entre 5% e 35%), pois, para cobrir esta variação de 30% em 'teta'v com resolução de 1%, é necessário medir variações de temperatura de aproximadamente 0,026 ºC nos sensores de pulso de calor a duas pontas e 0,05 ºC para os sensores de pulso de calor de ponta simples. Neste trabalho foi desenvolvido um novo sensor de umidade de solo do tipo pulso de calor de ponta simples, baseado em um único elemento: um transistor bipolar de junção npn, que é usado tanto como aquecedor e como sensor de temperatura de alta precisão. Resultados experimentais, obtidos em medidas realizadas através de uma técnica de interrogação especialmente desenvolvida para este novo sensor mostram que neste trabalho foi possível obter uma sensibilidade cerca de uma ordem de grandeza maior do que nos sensores de pulso de calor com uma ponta e cerca de 20 vezes maior do que nos sensores de pulso de calor de duas pontas. Outra vantagem da técnica desenvolvida é que o aumento da sensibilidade não é obtido às custas do aumento da corrente drenada da bateria para aquecer o sensor. No sensor desenvolvido é utilizada uma corrente de apenas 6 mA para gerar o aquecimento (com energia dissipada de 1,5 J), enquanto que que os sensores de pulso de calor com ponta simples requerem cerca de 50 mA (com 2,4 J de energia dissipada) para operar. Os sensores de pulso de calor de ponta dupla também são fabricados com resistores que requerem cerca de 50 mA para o aquecimento (0.8 J de energia dissipada) para operar corretamente
Abstract: The concern regarding sustainable development and crop inputs optimization (such as water, fertilizers, pesticides and soil PH correction products) has led to the development of the precision agriculture concept, that allows to determine the exact amount of each input required on each ground section (typically one hectare), avoiding waste of inputs. Low-cost and easily handled soil moisture sensors are very important for allowing a precise irrigation control. The class of sensors which fulfill those requirements are the heat transfer sensors, where there are basically two types of devices: dual (or multi) probe heat pulse sensors and single probe heat pulse sensors. However, these sensors have a low sensitivity in the most important range of soil humidity 'teta'v for plants (usually from 5% ? 'teta'v ? 35%). To cover this 30% soil humidity range with 1% resolution it is necessary to measure temperature with a resolution of 0,026 ºC in the dual/multi probe heat pulse sensors and 0,05 ºC in the single probe heat pulse sensor. In this work it was developed a new type of single probe heat pulse sensor, comprised of a single element: an npn junction bipolar transistor, that plays the role of both the heating element and a high accuracy temperature sensor. Experimental results, obtained through an interrogation technique especially developed for this sensor, show sensitivity about one order of magnitude greater than the typical sensitivity of the single probe heat pulse sensors and 20 times greater than dual probe heat pulse sensors. Another great advantage of the developed interrogation technique is that the increase in sensibility is not obtained through a higher current being drained from the batteries that power the sensor. The developed sensor operates at a much lower current level than the other sensors, draining only 6 mA from the battery (with an energy of 150 mW). The single probe heat pulse sensor requires 50 mA and 1.5 J of energy to operate, whilst the dual probe heat pulse sensors are manufactured with resistors which also drain 50 mA from the battery with 0.8 J of dissipated energy
Mestrado
Eletrônica, Microeletrônica e Optoeletrônica
Mestre em Engenharia Elétrica
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Rosek, Alyssa. "Expression of Epstein-Barr virus proteins and their detection by IgG antibodies." OpenSIUC, 2018. https://opensiuc.lib.siu.edu/theses/2460.
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Epstein-Barr virus, or EBV, is a human herpesvirus that is nearly universally present in most of the human population. The infection rate in adults is quickly approaching an astonishing 95% worldwide. While the most common clinical manifestation of EBV infection is infectious mononucleosis, there are multiple malignancies strongly associated with the virus, such as nasopharyngeal carcinoma (NPC). A contemporary problem in public health is the scarcity of markers to predict the development of EBV-associated malignancies, which prevents a possible cure or a suitable treatment. Of the approximately 85 proteins that the virus expresses, EBV serological tests rely on detection of antibodies against only three antigens: BFRF3 (viral capsid antigen or VCA), BMRF1 (early antigen or EA), and BKRF1 (nuclear antigen or NA). Antibodies against two of these antigens, VCA and NA, are produced by almost all EBV carriers for their entire lifetime, and so detection of these antibodies can make it difficult to differentiate between non-cancerous EBV carriers and EBV-associated cancer patients. To address this problem, the project aimed to identify a set of markers to diagnose NPC and treat it. To test this, 3 EBV genes were cloned with a 3X FLAG-tag into a mammalian expression vector, then expressed and detected by immunoblotting with a monoclonal FLAG antibody and each of the 9 human serum samples used in this study. Our results were generally inconclusive, and further studies are warranted to explore possible diagnostic and prognostic biomarkers.
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Melvin, James E. "AUV fault detection using model based observer residuals." Thesis, Monterey, Calif. : Naval Postgraduate School, 1998. http://bosun.nps.edu/uhtbin/hyperion-image.exe/NPS-ME-98-004.pdf.
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Thesis (M.S. in Mechanical Engineering and Mechanical Engineer) Naval Postgraduate School, June 1998.Title from cover. Thesis advisor(s): Anthony J. Healey. "June 1998."--Cover. "NPS-ME-98-004"--Cover. Includes bibliographical references (p. 117-118). Also available online.
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Ellison, Aaron S. "Simulation of a radar detection model using the NPS platform foundation." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1996. http://handle.dtic.mil/100.2/ADA311143.
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Surovič, Marek. "Statická detekce malware nad LLVM IR." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2016. http://www.nusl.cz/ntk/nusl-255427.
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Tato práce se zabývá metodami pro behaviorální detekci malware, které využívají techniky formální analýzy a verifikace. Základem je odvozování stromových automatů z grafů závislostí systémových volání, které jsou získány pomocí statické analýzy LLVM IR. V rámci práce je implementován prototyp detektoru, který využívá překladačovou infrastrukturu LLVM. Pro experimentální ověření detektoru je použit překladač jazyka C/C++, který je schopen generovat mutace malware za pomoci obfuskujících transformací. Výsledky předběžných experimentů a případná budoucí rozšíření detektoru jsou diskutovány v závěru práce.
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Li, Qiongzhu. "Study of Single and Ensemble Machine Learning Models on Credit Data to Detect Underlying Non-performing Loans." Thesis, Uppsala universitet, Statistiska institutionen, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-297080.
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In this paper, we try to compare the performance of two feature dimension reduction methods, the LASSO and PCA. Both simulation study and empirical study show that the LASSO is superior to PCA when selecting significant variables. We apply Logistics Regression (LR), Artificial Neural Network (ANN), Support Vector Machine (SVM), Decision Tree (DT) and their corresponding ensemble machines constructed by bagging and adaptive boosting (adaboost) in our study. Three experiments are conducted to explore the impact of class-unbalanced data set on all models. Empirical study indicates that when the percentage of performing loans exceeds 83.3%, the training models shall be carefully applied. When we have class-balanced data set, ensemble machines indeed have a better performance over single machines. The weaker the single machine, the more obvious the improvement we can observe.
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Čegan, Jakub. "Detekce síťových útoků pomocí statistických modelů nad netflow daty." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2012. http://www.nusl.cz/ntk/nusl-236589.
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This diploma thesis describes several selected network attacks detection method using statistical models with NetFlow data. First are described several well known and threats for computer networks, which are easily detectable in the NetFlow data. Thesis also introduce and present the NetFlow technology including its protocol and architecture. The theoretical part of the thesis describes statistical methods with focus on the ASTUTE method, that can be used for an anomaly detection. Following part introduces tools used for method implementation as the NfSen plugins. Last parts of the thesis describe in detail implementation of the plugins and following plugins testing which included simulated network attacks.
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Lagová, Lenka. "Rozšířená realita nad obrazem ze stacionární kamery." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2015. http://www.nusl.cz/ntk/nusl-264953.
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This thesis deals with the issue of creating applications of augmented reality. There are described types of augmented reality, problems associated with developing of applications of this kind. Also there is description of method for detection of moving objects from the record of stationary camera. The thesis deals with camera calibration using knowledge of scene geometry. Scene editor for scene geometry estimation is included in this work. Augmented reality is represented by physical simulations, where object from virtual reality interacts with detected objects and with objects defined in scene editor.
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Marques, Rui Miguel Ribeiro Mateus. "Gastric adenocarcinoma: contribute of computed tomography in preoperative T nad N staging." Master's thesis, Faculdade de Ciências Médicas. UNL, 2012. http://hdl.handle.net/10362/9081.
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RESUMO:Os recentes progressos na imagiologia médica possibilitaram um papel de
destaque para a Tomografia Axial Computorizada Multicorte no estadiamento do
carcinoma do estômago (GA). Foi objetivo deste estudo avaliar a acuidade desta técnica
no estadiamento T (invasão mural) e N (ganglionar) e avaliar fatores de prognóstico
como fatores de representação/substituição para melhorar a referida acuidade. Sessenta
e nove pacientes operados a carcinoma gástrico (GA) entre Janeiro de 2010 e Julho de 2012 e avaliados por Tomografia Computorizada, a maioria recorrendo a técnica de multicorte com distensão gástrica, foram estadiados retrospetivamente por três imagiologistas. Utilizaram-se critérios de avaliação referidos na literatura especializada e fatores de substituição/representação nos estadios menos eficazes. O estadiamento T revelou acuidade de 66,7% e sensibilidade de 92% e a acuidade, sensibilidade e especificidade obtidas para o estadiamento N foram respetivamente 49%, 40,9% e 64%.
Usando um fator de substituição de estadiamento diagnóstico T4/N2 para mudar o
estadiamento N2 obtido por MDCT para estadiamento N3A aumentaria a acuidade do
estadiamento N para 59% e a sensibilidade para 58,1% e baixaria a especificidade para
61,5%, embora essa mudança não fosse estatisticamente significativa (Teste exato de Fisher 0,159). Em conclusão a acuidade de uma técnica simples de MDCT com distensão
gástrica no estadiamento T e N do GA está dentro dos valores citados na literatura e
fatores de substituição/representação como o estadiamento T4 e o tipo Difuso da
classificação de Lauren podem melhorar a acuidade do estadiamento N.-------------- ABSTRACT: Recent innovations in medical sectional imaging have allowed a major role of multi-detector computed tomography (MDCT) in staging of gastric adenocarcinoma
(GA). The purpose of this study was to evaluate the accuracy of this technique in depth of mural invasion (T) and nodal (N) staging of GA and to evaluate prognostic factors as surrogate factors to improve such accuracy. Sixty nine patients operated to GA between January 2010 and July 2012 that underwent Computed Tomography, the majority
through Multidetector Computed Tomography (MDCT) with gastric distention, were
staged retrospectively by three imagiologists with state-of-the-art criteria and surrogate prognostic factors were analyzed for less accurate stages. MDCT T-staging was 66,7 % accurate with a sensibility of 92 % and there was a 49 % accuracy, 40,9 % sensibility and 64 % specificity for N Staging. Using a surrogate factor of T4/N2 diagnostic staging to change diagnostic MDCT N2 disease to N3A disease would increase accuracy of N staging to 59% and sensibility to 58,1% and would decrease specificity to 61,5 %, although that change was not statistically significant (Fisher´s Exact Test 0,159)In conclusion the accuracy of a simple hydro-MDCT technique in T and N staging of GA is in the range of values cited in the literature and surrogate factors as diagnostic T4 disease and diffuse type of Lauren´s Classification may improve the accuracy of N staging.
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Higgins, Paul Anthony. "Reducing uncertainty in new product development." Thesis, Queensland University of Technology, 2008. https://eprints.qut.edu.au/20273/1/Paul_Higgins_Thesis.pdf.
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Research and Development engineering is at the corner stone of humanity’s evolution. It is perceived to be a systematic creative process which ultimately improves the living standard of a society through the creation of new applications and products. The commercial paradigm that governs project selection, resource allocation and market penetration prevails when the focus shifts from pure research to applied research. Furthermore, the road to success through commercialisation is difficult for most inventors, especially in a vast and isolated country such as Australia which is located a long way from wealthy and developed economies.
While market leading products are considered unique, the actual process to achieve these products is essentially the same; progressing from an idea, through development to an outcome (if successful). Unfortunately, statistics indicate that only 3% of ‘ideas’ are significantly successful, 4% are moderately successful, and the remainder ‘evaporate’ in that form (Michael Quinn, Chairman, Innovation Capital Associates Pty Ltd).
This study demonstrates and analyses two techniques developed by the author which reduce uncertainty in the engineering design and development phase of new product development and therefore increase the probability of a successful outcome. This study expands the existing knowledge of the engineering design and development stage in the new product development process and is couched in the identification of practical methods, which have been successfully used to develop new products by Australian Small Medium Enterprise (SME) Excel Technology Group Pty Ltd (ETG).
Process theory is the term most commonly used to describe scientific study that identifies occurrences that result from a specified input state to an output state, thus detailing the process used to achieve an outcome. The thesis identifies relevant material and analyses recognised and established engineering processes utilised in developing new products. The literature identified that case studies are a particularly useful method for supporting problem-solving processes in settings where there are no clear answers or where problems are unstructured, as in New Product Development (NPD).
This study describes, defines, and demonstrates the process of new product development within the context of historical product development and a ‘live’ case study associated with an Australian Government START grant awarded to Excel Technology Group in 2004 to assist in the development of an image-based vehicle detection product. This study proposes two techniques which reduce uncertainty and thereby improve the probability of a successful outcome.
The first technique provides a predicted project development path or forward engineering plan which transforms the initial ‘fuzzy idea’ into a potential and achievable outcome. This process qualifies the ‘fuzzy idea’ as a potential, rationale or tangible outcome which is within the capability of the organisation. Additionally, this process proposes that a tangible or rationale idea can be deconstructed in reverse engineering process in order to create a forward engineering development plan. A detailed structured forward engineering plan reduces the uncertainty associated with new product development unknowns and therefore contributes to a successful outcome. This is described as the RETRO technique. The study recognises however that this claim requires qualification and proposes a second technique.
The second technique proposes that a two dimensional spatial representation which has productivity and consumed resources as its axes, provides an effective means to qualify progress and expediently identify variation from the predicted plan. This spatial representation technique allows a quick response which in itself has a prediction attribute associated with directing the project back onto its predicted path. This process involves a coterminous comparison between the predicted development path and the evolving actual project development path. A consequence of this process is verification of progress or the application of informed, timely and quantified corrective action. This process also identifies the degree of success achieved in the engineering design and development phase of new product development where success is defined as achieving a predicted outcome. This spatial representation technique is referred to as NPD Mapping. The study demonstrates that these are useful techniques which aid SMEs in achieving successful new product outcomes because the technique are easily administered, measure and represent relevant development process related elements and functions, and enable expedient quantified responsive action when the evolving path varies from the predicted path. These techniques go beyond time line representations as represented in GANTT charts and PERT analysis, and represent the base variables of consumed resource and productivity/technical achievement in a manner that facilitates higher level interpretation of time, effort, degree of difficulty, and product complexity in order to facilitate informed decision making. This study presents, describes, analyses and demonstrates an SME focused engineering development technique, developed by the author, that produces a successful new product outcome which begins with a ‘fuzzy idea’ in the mind of the inventor and concludes with a successful new product outcome that is delivered on time and within budget. Further research on a wider range of SME organisations undertaking new product development is recommended.
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Higgins, Paul Anthony. "Reducing uncertainty in new product development." Queensland University of Technology, 2008. http://eprints.qut.edu.au/20273/.
Full textAbstract:
Research and Development engineering is at the corner stone of humanity’s evolution. It is perceived to be a systematic creative process which ultimately improves the living standard of a society through the creation of new applications and products. The commercial paradigm that governs project selection, resource allocation and market penetration prevails when the focus shifts from pure research to applied research. Furthermore, the road to success through commercialisation is difficult for most inventors, especially in a vast and isolated country such as Australia which is located a long way from wealthy and developed economies.
While market leading products are considered unique, the actual process to achieve these products is essentially the same; progressing from an idea, through development to an outcome (if successful). Unfortunately, statistics indicate that only 3% of ‘ideas’ are significantly successful, 4% are moderately successful, and the remainder ‘evaporate’ in that form (Michael Quinn, Chairman, Innovation Capital Associates Pty Ltd).
This study demonstrates and analyses two techniques developed by the author which reduce uncertainty in the engineering design and development phase of new product development and therefore increase the probability of a successful outcome. This study expands the existing knowledge of the engineering design and development stage in the new product development process and is couched in the identification of practical methods, which have been successfully used to develop new products by Australian Small Medium Enterprise (SME) Excel Technology Group Pty Ltd (ETG).
Process theory is the term most commonly used to describe scientific study that identifies occurrences that result from a specified input state to an output state, thus detailing the process used to achieve an outcome. The thesis identifies relevant material and analyses recognised and established engineering processes utilised in developing new products. The literature identified that case studies are a particularly useful method for supporting problem-solving processes in settings where there are no clear answers or where problems are unstructured, as in New Product Development (NPD).
This study describes, defines, and demonstrates the process of new product development within the context of historical product development and a ‘live’ case study associated with an Australian Government START grant awarded to Excel Technology Group in 2004 to assist in the development of an image-based vehicle detection product. This study proposes two techniques which reduce uncertainty and thereby improve the probability of a successful outcome.
The first technique provides a predicted project development path or forward engineering plan which transforms the initial ‘fuzzy idea’ into a potential and achievable outcome. This process qualifies the ‘fuzzy idea’ as a potential, rationale or tangible outcome which is within the capability of the organisation. Additionally, this process proposes that a tangible or rationale idea can be deconstructed in reverse engineering process in order to create a forward engineering development plan. A detailed structured forward engineering plan reduces the uncertainty associated with new product development unknowns and therefore contributes to a successful outcome. This is described as the RETRO technique. The study recognises however that this claim requires qualification and proposes a second technique.
The second technique proposes that a two dimensional spatial representation which has productivity and consumed resources as its axes, provides an effective means to qualify progress and expediently identify variation from the predicted plan. This spatial representation technique allows a quick response which in itself has a prediction attribute associated with directing the project back onto its predicted path. This process involves a coterminous comparison between the predicted development path and the evolving actual project development path. A consequence of this process is verification of progress or the application of informed, timely and quantified corrective action. This process also identifies the degree of success achieved in the engineering design and development phase of new product development where success is defined as achieving a predicted outcome. This spatial representation technique is referred to as NPD Mapping. The study demonstrates that these are useful techniques which aid SMEs in achieving successful new product outcomes because the technique are easily administered, measure and represent relevant development process related elements and functions, and enable expedient quantified responsive action when the evolving path varies from the predicted path. These techniques go beyond time line representations as represented in GANTT charts and PERT analysis, and represent the base variables of consumed resource and productivity/technical achievement in a manner that facilitates higher level interpretation of time, effort, degree of difficulty, and product complexity in order to facilitate informed decision making. This study presents, describes, analyses and demonstrates an SME focused engineering development technique, developed by the author, that produces a successful new product outcome which begins with a ‘fuzzy idea’ in the mind of the inventor and concludes with a successful new product outcome that is delivered on time and within budget. Further research on a wider range of SME organisations undertaking new product development is recommended.
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Celik, Mustafa. "Measurements and modeling enhancements for the NPS Minimum Resolvable Temperature Difference Model, VISMODII /." Thesis, Monterey, California. Naval Postgraduate School, 2001. http://handle.dtic.mil/100.2/ADA397426.
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Zuway, Khaled Youssff. "Development of new methods of detection and quantification of controlled and new psychoactive substances (NPS) using liquid chromatography-amperometric detection (LC-AD)." Thesis, Manchester Metropolitan University, 2018. http://e-space.mmu.ac.uk/622108/.
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The global increase in the prevelance and abuse of new psychoactive substances (NPS) has required the development of new analytical methods for rapid, selective and inexpensive protocols for both their separation and detection. Electrochemical sensing of these compounds has been demonstrated to be an effective method for their in-field detection, either in their pure form or the presence of common adulterants. The electrochemical technique can differentiate between structurally-related phenethylamines (for example (±)-paramethoxyamphetamine and (±)-3,4-methylene dioxymethamphetamine, however it is limited in its ability to distinguish between structurally-related cathinone-derivatives, for example (±)-4-mephedrone and (±)-4-methyl-N-ethycathinone. The HPLC-AD protocol obtained a cost-effective, reproducible, and reliable sensor platform for detection of the target analytes by simultaneous HPLC-UV and amperometric detection protocol. Additionally, the simultaneous HPLC-UV and amperometric detection protocol detailed herein shows a marked improvement in selectively discriminating between structurally related compounds. This thesis demonstrates, for the first time, the combination of HPLC-UV with amperometric detection (HPLC-AD) for the detection and quantitative analysis of new psychoactive substances using a commercially available impinging jet (LC-FC-A system) or using a custom-made iCell channel flow-cell system (LC-FC-B), both incorporating embedded graphite screen-printed macroelectrodes. The method demonstrates the application of a cost-effective, reproducible, and reliable sensor platform for the simultaneous HPLC-UV and amperometric detection of target analytes. Although the amperometric detection (HPLC-AD) system that has been developed is not as sensitive as standard HPLC-UV detection,both LC-FC-A and LC-FC-B show a good agreement between the quantitative electroanalytical data. Therefore, they are suitable for the detection and quantification of new psychoactive substances, either in their pure form or within complex mixtures. Additionally, the simultaneous HPLC-AD protocol shows a marked improvement and advantage over previously reported electroanalytical methods. The electroanalytical methods were either unable to selectively differentiate between structurally related synthetic cathinones (e.g. (±)-mephedrone and (±)-4-MEC (Smith et al., 2014a)), or utilised harmful and restrictive materials in their design by adding the illegal compounds in combination with the legal compounds.
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Marino, Stephen A. "Operation and calibration of the NPS Ultraviolet Imaging Spectrometer (NUVIS) in the detection of sulfur dioxide plumes." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1999. http://handle.dtic.mil/100.2/ADA373307.
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Thesis (M.S. in Applied Physics) Naval Postgraduate School, December 1999."December 1999". Thesis advisor(s): David S. Davis, Richard C. Olsen. Includes bibliographical references (p. 91-92). Also available online.
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Mahmood, Waqas, and Muhammad Faheem Akhtar. "Validation of Machine Learning and Visualization based Static Code Analysis Technique." Thesis, Blekinge Tekniska Högskola, Sektionen för datavetenskap och kommunikation, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-4347.
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Software security has always been an afterthought in software development which results into insecure software. Companies rely on penetration testing for detecting security vulnerabilities in their software. However, incorporating security at early stage of development reduces cost and overhead. Static code analysis can be applied at implementation phase of software development life cycle. Applying machine learning and visualization for static code analysis is a novel idea. Technique can learn patterns by normalized compression distance NCD and classify source code into correct or faulty usage on the basis of training instances. Visualization also helps to classify code fragments according to their associated colors. A prototype was developed to implement this technique called Code Distance Visualizer CDV. In order test the efficiency of this technique empirical validation is required. In this research we conduct series of experiments to test its efficiency. We use real life open source software as our test subjects. We also collected bugs from their corresponding bug reporting repositories as well as faulty and correct version of source code. We train CDV by marking correct and faulty version of code fragments. On the basis of these trainings CDV classifies other code fragments as correct or faulty. We measured its fault detection ratio, false negative and false positive ratio. The outcome shows that this technique is efficient in defect detection and has low number of false alarms.Software trygghet har alltid varit en i efterhand inom mjukvaruutveckling som leder till osäker mjukvara. Företagen är beroende av penetrationstester för att upptäcka säkerhetsproblem i deras programvara. Att införliva säkerheten vid tidigt utvecklingsskede minskar kostnaderna och overhead. Statisk kod analys kan tillämpas vid genomförandet av mjukvaruutveckling livscykel. Tillämpa maskininlärning och visualisering för statisk kod är en ny idé. Teknik kan lära mönster av normaliserade kompressionständning avstånd NCD och klassificera källkoden till rätta eller felaktig användning på grundval av utbildning fall. Visualisering bidrar också till att klassificera code fragment utifrån deras associerade färger. En prototyp har utvecklats för att genomföra denna teknik som kallas Code Avstånd VISUALISERARE CDV. För att testa effektiviteten hos denna teknik empirisk validering krävs. I denna forskning vi bedriver serie experiment för att testa dess effektivitet. Vi använder verkliga livet öppen källkod som vår test ämnen. Vi har också samlats in fel från deras motsvarande felrapportering förråd samt fel och rätt version av källkoden. Vi utbildar CDV genom att markera rätt och fel version av koden fragment. På grundval av dessa träningar CDV klassificerar andra nummer fragment som korrekta eller felaktiga. Vi mätt sina fel upptäckt förhållandet falska negativa och falska positiva förhållandet. Resultatet visar att den här tekniken är effektiv i fel upptäckt och har låga antalet falsklarm.
waqasmah@gmail.com +46762316108
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He, Lijie. "Elaboration et évaluation d'une nouvelle hétérostructure Ag°/TIO2 destinée à la détection par effet SERS sans marquage d'ADN." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GRENI004/document.
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Des substrats SERS, élaborés selon une approche simple et à moindre coût, ont été étudiéspour la détection sans marqueurs d’ADN en vue d’applications dans le domaine du diagnostic médical.Un protocole de réduction photocatalytique assistée chimiquement conduisant à des hétérostructuresAg°/TiO2 a été optimisé. Nohttp://star.theses.fr/editeur.jsp?tefId=58411&action=save#droitsus avons montré en quoi l’utilisation d’un agent encapsulant et d’uneprocédure de nucléation-croissance permettent de contrôler la formation et l’agrégation de NPs Ag° à lasurface de couches minces TiO2. L’agrégation contrôlée des NPs conduit à des points chauds induisantune très forte amplification de l’effet SERS. Les performances des substrats SERS ont tout d’abord étévalidées par détection Raman de la molécule modèle R6G. Des études de fond, portant sur la détectionde polybases dérivées des quatre nucléobases constituant la structure de l’ADN, adénine, cytosine,guanine et thymine, ont ensuite été réalisées. Le potentiel de détection des hétérostructures Ag°/TiO2 apermis l’indexation quasi-intégrale des bandes Raman des quatre polybases étudiées, modifiées ou nonavec des groupements NH2, et nous a permis de discuter des effets d’accrochage, d’orientation etd’agencement des molécules d’ADN sur les substrats SERS. Des études complémentaires ont finalementconfirmé le potentiel de nos hétérostructures en fournissant différents aperçus sur l’hybridation despolybases et l’association de différentes polybases sur un même substrat SERSSERS substrates, elaborated through a simple and low-cost procedure, have been studied forthe label-free detection of DNA in the view of applications in the medical diagnostic field. A chemicallyassisted photocatalytic reduction protocol leading to an Ag°/TiO2 heterostructure has been optimized.We have shown how the use of an encapsulating agent and a nucleation-growth procedure enable tocontrol the formation and aggregation of Ag° NPs at the surface of TiO2 thin films. The controlledaggregation of NPs leads to hot points inducing a very strong amplification of the SERS effect.Performances of the SERS substrate have first been evaluated through the Raman detection of the R6Gmodel molecule. Thorough studies dealing with the detection of polybases derived from the fournucleobases constituting the DNA structure, adenine, cytosine, guanine, and thymine, have then beenconducted. The detection potential of the Ag°/TiO2 heterostructure enabled a nearly exhaustiveindexation of the Raman bands for the four studied polybases, modified or not with NH2 groups, and todiscuss on binding, orientation, and ordering effects of the DNA molecules on the SERS substrate.Complementary studies finally enabled us to confirm the potential of our heterostructure by providingdifferent insights on the polybase hybridization and the association of different polybases on a sameSERS substrate
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Ling, David. "Dynamická analýza paralelních programů na platformě .NET Framework." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2021. http://www.nusl.cz/ntk/nusl-445497.
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The thesis deals with a design and implementation of the dynamic analyser of parallel applications on the .NET Framework platform. The problematic of synchronization in parallel applications, the instrumentation of such an applications, testing of parallel applications and a specifics of these problems for C\# language and for the platform .NET Framework are discussed in the theoretical part. Selected algorithms for detection of deadlocks (the algorithm of Goodlock) and data-race errors (the algorithm of FastTrack and AtomRace) are described in detail in this part as well. Requirements for the dynamic analyser and the system design is made in the following part of this thesis. The thesis also contains a description of the implementation of the proposed solution, a description of the entire testing of the implemented tool. Last but not least, the thesis describes the sample of using dynamic analysers in a particular application environment.
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Guirguis, Amira. "Identification and classification of new psychoactive substances using Raman spectroscopy and chemometrics." Thesis, University of Hertfordshire, 2017. http://hdl.handle.net/2299/18331.
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The sheer number, continuous emergence, heterogeneity and wide chemical and structural diversity of New Psychoactive Substance (NPS) products are factors being exploited by illicit drug designers to obscure detection of these compounds. Despite the advances in analytical techniques currently used by forensic and toxicological scientists in order to enable the identification of NPS, the lack of a priori knowledge of sample content makes it very challenging to detect an 'unknown' substance. The work presented in this thesis serves as a proof-of-concept by combining similarity studies, Raman spectroscopy and chemometrics, underpinned by robust pre-processing methods for the identification of existing or newly emerging NPS. It demonstrates that the use of Raman spectroscopy, in conjunction with a 'representative' NPS Raman database and chemometric techniques, has the potential for rapidly and non-destructively classifying NPS according to their chemical scaffolds. The work also demonstrates the potential of indicating the purity in formulations typical of those purchased by end users of the product i.e. 'street-like' mixtures. Five models were developed, and three of these provided an insight into the identification and classification of NPS depending on their purity. These are: the 'NPS and non-NPS/benchtop' model, the 'NPS reference standards/handheld' model and the 'NPS and non-NPS/handheld' model. In the 'NPS and non-NPS/benchtop' model (laser λex = 785 nm), NPS internet samples were projected onto a PCA model derived from a Raman database comprising 'representative' NPSs and cutting agent/ adulterant reference standards. This proved the most successful in suggesting the likely chemical scaffolds for NPS present in samples bought from the internet. In the 'NPS reference standards/handheld' model (laser λex = 1064 nm), NPS reference standards were projected onto a PCA model derived from a Raman database comprising 'representative' NPSs. This was the most successful of the three models with respect to the accurate identification of pure NPS. This model suggested chemical scaffolds in 89% of samples compared to 76% obtained with the benchtop instrument, which generally had higher fluorescent backgrounds. In the 'NPS and non-NPS/handheld' model (laser λex = 1064 nm), NPS internet samples were projected onto a PCA model derived from a Raman database comprising 'representative' NPSs and cutting agent/ adulterant reference standards. This was the most successful in differentiating between NPS internet samples dependent on their purity. In all models, the main challenges for identification of NPS were spectra displaying high fluorescent backgrounds and low purity profiles. The 'first pass' matching identification of NPS internet samples on a handheld platform was improved to ~50% using a laser source of 1064 nm because of a reduction in fluorescence at this wavelength. We outline limitations in using a handheld platform that may have added to problems with appropriate identification of NPS in complex mixtures. However, the developed models enabled the appropriate selection of Raman signals crucial for identification of NPS via data reduction, and the extraction of important patterns from noisy and/or corrupt data. The models constitute a significant contribution in this field with respect to suggesting the likely chemical scaffold of an 'unknown' molecule. This insight may accelerate the screening of newly emerging NPS in complex matrices by assigning them to: a structurally similar known molecule (supercluster/ cluster); or a substance from the same EMCDDA/EDND class of known compounds. Critical challenges in instrumentation, chemometrics, and the complexity of samples have been identified and described. As a result, future work should focus on: optimising the pre-processing of Raman data collected with a handheld platform and a 1064 nm laser λex; and optimising the 'representative' database by including other properties and descriptors of existing NPS.
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Jackson, LaDonya L. "Type 1 Diabetes Diagnostic Assay." Ohio University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1449238918.
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Larabi, Islam Amine. "Nouveaux produits de synthèse : analyse, consommation et métabolisme ; Applications cliniques et médicolégales Rapid and simultaneous screening of new psychoactive substances and conventional drugs of abuse. A comparative study of Biochip Array Technology versus LC-MS/MS in whole blood and urine Development of a sensitive untargeted liquid chromatography– high resolution mass spectrometry screening devoted to hair analysis through a shared MS2 spectra database: A step toward early detection of new psychoactive substances Validation of an UPLC-MS/MS method for the determination of sixteen synthetic cannabinoids in human hair. Application to document chronic use of JWH-122 following a non-fatal overdose Development and validation of liquid chromatography-tandem mass spectrometry targeted screening of 16 fentanyl analogs and U-47700 in hair: Application to 137 authentic samples Prevalence and Surveillance of Synthetic Cathinones Use by Hair Analysis: An Update Review Prevalence of New Psychoactive Substances(NPS) and conventional drugs of abuse (DOA) in high risk populations from Paris(France) and its suburbs A cross sectional study by hair testing(2012–2017) Evaluation of drug abuse by hair analysis and self-reported use among MSM under PrEP: Results from a sub-study of the ANRS-IPERGAY trial. Hair testing for 3‑fluorofentanyl, furanylfentanyl, methoxyacetylfentanyl, carfentanil, acetylfentanyl and fentanyl by LC–MS/MS after unintentional overdose Drug‐facilitated sexual assault (DFSA) involving 4‐methylethcathinone (4‐MEC),3,4‐Methylenedioxypyrovalerone (MDPV), and doxylamine highlighted by hair analysis Metabolic Profiling of Deschloro-N-ethyl-ketamine (O-PCE) and identification of new target metabolites in urine and hair using human liver microsomes and high-resolution accurate mass spectrometry." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASL029.
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L’objectif de ce travail a été de développer deux approches analytiques dédiées à l’analyse toxicologique des nouveaux produits de synthèse (NPS) dans différentes matrices biologiques (sang, urine et cheveux). La première est basée sur le criblage non ciblé par chimiluminescence sur biopuces et chromatographie liquide couplée à la spectrométrie de masse haute résolution (LC-HRMS) et la deuxième correspond à un criblage ciblé par spectrométrie de masse en tandem (LC-MS/MS). Ces deux approches ont ensuite été appliquées dans des études observationnelles pour évaluer la consommation de NPS dans des populations à risques de surdosage, de pharmacodépendance ou de soumission chimique dans un contexte clinique ou médico-judiciaire.La dernière partie a été consacrée au développement d’un nouvel outil analytique de traitement des données issues de la LC-HRMS qui a permis d’étudier le métabolisme de 9 NPS in vitro sur des cultures de microsomes du foie humain (HLM) et in vivo sur des échantillons biologiques d’usagers de ces drogues. Cette dernière approche a permis la création d’une bibliothèque de spectres de haute résolution composée de 228 métabolites dont certains ont été proposés comme marqueurs pertinents d’exposition aux NPS dont ils sont issus.Ce travail a été concrétisé par la rédaction de 10 publications scientifiques et a permis d’initier plusieurs collaborations pluridisciplinairesThe aim of the present work was to develop two analytical approaches dedicated to the analysis of new psychoactive substances in different biological matrices (blood, urine and hair). The first approach is based on untargeted screening by both biochip array technology chemiluminescence assay and liquid chromatography coupled to high resolution mass spectrometry (LC-HRMS) and the second corresponds to a targeted screening by liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS). These two approaches were then applied in observational studies to assess the consumption of NPS in high risk populations (overdose, drug abuse, drug facilitated crimes) in clinical and forensic settings. The last part of the work was devoted to the development of a new analytical tool for LC-HRMS data processing which made it possible to study the metabolism of 9 NPS In vitro on human liver microsomes (HLM) and In vivo in biological samples from drug users. This approach has enabled the creation of HRMS spectral library containing 228 metabolites, some of which have been proposed as relevant markers of NPS exposure.This work has resulted on 10 scientific publications and allowed to initiate many multidisciplinary collaborations
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Roman-Gonzalez, Avid. "Compression Based Analysis of Image Artifacts: Application to Satellite Images." Phd thesis, Telecom ParisTech, 2013. http://tel.archives-ouvertes.fr/tel-00935029.
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This thesis aims at an automatic detection of artifacts in optical satellite images such as aliasing, A/D conversion problems, striping, and compression noise; in fact, all blemishes that are unusual in an undistorted image. Artifact detection in Earth observation images becomes increasingly difficult when the resolution of the image improves. For images of low, medium or high resolution, the artifact signatures are sufficiently different from the useful signal, thus allowing their characterization as distortions; however, when the resolution improves, the artifacts have, in terms of signal theory, a similar signature to the interesting objects in an image. Although it is more difficult to detect artifacts in very high resolution images, we need analysis tools that work properly, without impeding the extraction of objects in an image. Furthermore, the detection should be as automatic as possible, given the quantity and ever-increasing volumes of images that make any manual detection illusory. Finally, experience shows that artifacts are not all predictable nor can they be modeled as expected. Thus, any artifact detection shall be as generic as possible, without requiring the modeling of their origin or their impact on an image. Outside the field of Earth observation, similar detection problems have arisen in multimedia image processing. This includes the evaluation of image quality, compression, watermarking, detecting attacks, image tampering, the montage of photographs, steganalysis, etc. In general, the techniques used to address these problems are based on direct or indirect measurement of intrinsic information and mutual information. Therefore, this thesis has the objective to translate these approaches to artifact detection in Earth observation images, based particularly on the theories of Shannon and Kolmogorov, including approaches for measuring rate-distortion and pattern-recognition based compression. The results from these theories are then used to detect too low or too high complexities, or redundant patterns. The test images being used are from the satellite instruments SPOT, MERIS, etc. We propose several methods for artifact detection. The first method is using the Rate-Distortion (RD) function obtained by compressing an image with different compression factors and examines how an artifact can result in a high degree of regularity or irregularity affecting the attainable compression rate. The second method is using the Normalized Compression Distance (NCD) and examines whether artifacts have similar patterns. The third method is using different approaches for RD such as the Kolmogorov Structure Function and the Complexity-to-Error Migration (CEM) for examining how artifacts can be observed in compression-decompression error maps. Finally, we compare our proposed methods with an existing method based on image quality metrics. The results show that the artifact detection depends on the artifact intensity and the type of surface cover contained in the satellite image.
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ABHISHEK. "UNCONSTRAINED AND MULTI VIEW FACE DETECTOR." Thesis, 2018. http://dspace.dtu.ac.in:8080/jspui/handle/repository/16527.
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The mainfprecondition for applicationsfsuch as facefrecognition and facefde-identification forfprivacy protectionfis efficient facefdetection in realfscenes.The proposal isfa multi stage cascadefmodel for facefdetection . The cascadedftwo-stage model isfbased on the fastfnormalized pixel difference (NPD) detectorfat the firstfstage, and MTCNN based CNNfat thefsecond stage. The outputsfof the NPD detectorfare having small numberfof false negative (FN) and a muchfhigher number of falsefpositive face (FP) detections.Order of magnitudefof FP detections areftypically higherfthan the FN ones. Due tofthis very highfnumber of FPs hasfa negative impactfon recognition andfde-identification processingftime and on thefnaturalness of thefde-identified images. Tofsuppress the effect offlarge numberfof FP face detections, afCNN is used atfthe secondfstage. The CNN is appliedfonly on face regionfsolution obtainedfby the NPD detectorfthat have an NPDfscore in the intervalfbetween twofexperimentally determinedfthresholds. The experimentalfresults on thefpart of the Face Detection Dataset and Benchmark (FDDB) showfthat the hybrid cascadefmodel significantly reducesfthe number of FPfdetections while the numberfof FN detections are onlyfslightly increased.f
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Jia, W. "Number Plate Detection (NPD) algorithm." Thesis, 2006. http://hdl.handle.net/10453/37716.
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University of Technology, Sydney. Faculty of Information Technology.Automatic Number Plate Recognition (ANPR) is an important Intelligent Transportation System (ITS) technology, which distinguishes each vehicle as unique by recognising the characters in their number plates via image analysis and pattern recognition techniques. In an ANPR system, the most crucial part is number plate detection. The research presented in this thesis focuses on the detection mechanism and will rely on a third-party Optical Character Recognition (OCR) software for character recognition. Number Plate Detection (NPD) is a well-explored problem with many successful solutions. Although most of these solutions are reasonably fast and robust, they can be further improved to make them even faster and more robust to deal with various complex conditions in real-time. This thesis first presents a region-based NPD algorithm, which provides much more accurate detection results than previous NPD algorithms and is robust against interference characters in images. Then, a fast and robust edge-based NPD algorithm is developed. Tins algorithm can detect various number plates under various conditions in real-time with a high detection rate and a very low false positive rate. Similar work has not been reported elsewhere. Besides character information, the colour information of number plates also plays an important role in identifying each number plate as unique. Hence, this thesis also develops algorithms for classifying number plate colours. Histogram-based image matching methods are investigated, and a Gaussian Weighted Histogram Intersection (GWHI) algorithm is presented. This algorithm is shown to be much more robust against various colour variations than previous methods. Furthermore, a novel Colour Edge Co-occurrence Histogram (CECH) method is presented. It is shown to be particularly applicable for rapidly matching compound objects, such as number plates. Finally, histogram-based image matching technique on a hexagonal image structure is investigated. Gevers' idea of using Colour Ratio Gradient (CRG) for robust object matching is redefined on hexagonal structure, arid a novel Symmetric Colour Ratio Gradient (SCRG) method is developed. Experimental results demonstrate that the proposed SCRG method outperforms the Gevers’ CRG method. More contributions can be found in the appendices. A new virtual hexagonal structure is proposed, on which the time used for mapping a square-based image to hexagon-based image is dramatically reduced. Two basic image transformation operations and a novel edge detection algorithm are performed on the new structure. The results obtained in this thesis can also be applied to many other areas such as Character Detection, Text Detection, and Image/Video Retrieval
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Kura, Vijay B. "Novel pitch detection algorithim with application to speech coding." 2003. http://louisdl.louislibraries.org/u?/NOD,69.
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Thesis (M.S.)--University of New Orleans, 2003.Title from electronic submission form. "A thesis ... in partial fulfillment of the requirements for the degree of Master of Science in the Department of Electrical Engineering"--Thesis t.p. Vita. Includes bibliographical references.
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Gendron, Marlin Lee. "Algorithms and data structures for automated change detection and classification of sidescan sonar imagery." 2004. http://louisdl.louislibraries.org/u?/NOD,185.
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Thesis (Ph. D.)--University of New Orleans, 2004.Title from electronic submission form. "A dissertation ... in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Engineering and Applied Science."--Dissertation t.p. Vita. Includes bibliographical references.
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Liu, Ting-Yen, and 劉定彥. "Design and Performance of Highly Efficient Ultraviolet NCD-assisted Detectors." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/v6jy54.
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碩士國立臺北科技大學
機電整合研究所
101
Nanocrystalline diamond (NCD) films are promising material for wide-spreading applications due to their outstanding chemical, physical characteristics, and highly smooth surface in comparison with microcrystalline diamond (MCD) films. In this study, NCD thin films have been synthesized using Microwave Plasma Jet Chemical vapor Deposition (MPJCVD) system with CH4/H2 as precursor gases. Scanning electron microscopy (SEM), Atomic force microscopy (AFM), Optical electron spectroscopy (OES), Raman spectroscopy, and contact angle measurement techniques were employed to investigate the effects of the deposition pressure, CH4 concentration, and microwave power on the characteristics of the as-deposited diamond films. The analysis showed that low deposition pressure and high CH4 concentration ensure the alteration of the diamond films from MCD to NCD structure. In addition, high density and activity plasma species were obtained under low deposition pressure as a result of the excitation of the focused plasma jet. The as-deposited NCD thin films were then employed to fabricate diamond-based Ultraviolet (UV) detector. In order to investigate the photoconductivity properties of the fabricated UV detectors, interdigital finger (IDF) Au electrodes were coated onto the NCD films followed by rapid thermal annealing (RTA) procedures. Moreover, the effects of grain size, surface roughness, optical transparence, and measurement temperature on the characterization of the UV detector were investigated. It was found that the Ohmic contact between NCD and Au films were obtained under 500 oC of the annealing temperature. Also, the I-V curve measurements under a rage of UV irradiances (10-4-10-2 W/cm-2) exhibit the significant deference of the dark current and photo current (10-102 times) of the diamond based UV detector could be obtained with smaller grain size and low surface roughness of the NCD films. The time-dependent measurements of photoresponse were applied to study the rise and decay time (0.2 and 0.3 s, respectively) upon switch UV light on and off. All the aforementioned outstanding results indeed open up an avenue for applications of NCD films in UV detector devices.
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Dahale, Radhika H. "Optoelectronic multifractal wavelet analysis for fast and accurate detection of rainfall in weather radar images." 2004. http://louisdl.louislibraries.org/u?/NOD,114.
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Thesis (M.S.)--University of New Orleans, 2004.Title from electronic submission form. "A thesis ... in partial fulfillment of the requirements for the degree of Master of Science in the Department of Electrical Engineering."--Thesis t.p. Vita. Includes bibliographical references.
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Malečková, Michaela. "Vývoj miniaturizované extrakční metody pro screening netěkavých nitrososloučenin ve sladu pomocí GC-NCD." Master's thesis, 2018. http://www.nusl.cz/ntk/nusl-380392.
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The aim of this diploma thesis was to develop a miniaturized extraction method for a fast screening of non-volatile nitroso compounds using gas chromatography with a nitroso specific chemiluminescence detection. According to a final methodology, the samples were prepared by extraction of grinded malt using a mixture of pyridine and acetonitrile in ratio 60:40 (v/v). To enhance volatility of the determined analytes, the two-step derivatization using hexamethyldisalazane and N,O-bis(trimethyl)-trifluoroacetamide was used. The total volume of the sample was 200 l and the preparation time after optimization was in total 80 min. The extraction method was connected to a classification method, which can divide chromatographic peaks into the groups of N-nitroso and C-nitroso compounds, and interfering substances. After application of the methods mentioned above to real malt samples, the specific chromatographic peaks of C-nitroso and N-nitroso compounds were selected. Description of their properties and structure suggestion will be a subject of the following study. Keywords Nitroso compounds, malt, extraction, derivatization, gas chromatography, chemiluminescence detector
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陳威傑. "Synthesis and Characterization of NBD-DA, Cu-NBDAP and Rhodamine H for NO Detection." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/92672698411428648708.
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Sung, Yi-Ming, and 宋益銘. "Applications of Nanoparticles for NAD(P)H: quinone oxidoreductase isozyme 1, Ag+ and Cd2+ Detection." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/4nz3jx.
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博士國立交通大學
應用化學系碩博士班
102
(1) Quinone modified Mn-Doped ZnS Quantum Dots for Room Temperature Phosphorescence sensing of NQO1 A new room-temperature phosphorescence NAD(P)H: quinone oxidoreductase isozyme 1 (NQO1) sensor was developed by using quinone-modified Mn-doped ZnS quantum dots (Q-ZnS(Mn2+) QDs). It can selectively detect NQO1 in vitro and vivo through phosphorescence generated by reduction-initiated removal of quinones on its surface with NQO1. Enzyme kinetics of NQO1 was measured by phosphorescence enhancement of Q-ZnS(Mn2+) QDs revealed its highly catalytic activity towards Q-ZnS(Mn2+) QDs. High viability of cells in presence of Q-ZnS(Mn2+) QDs showed the low cytotoxicity to A549 cells from MTT assay. Therefore, Q-ZnS(Mn2+) QDs can be applied to detect NQO1 which is overexpressed in cytoplasma and nucleus of cancer cells. We successfully developed a highly selective room-temperature phosphorescent probe to detect the human cancer cells with the overexpressed NQO1 (2) Highly selective and sensitive colorimetric detection of Ag(I) using N-1-(2-mercaptoethyl)adenine functionalized gold nanoparticles A sensitive and selective colorimetric Ag+ detection method was developed by using N-1-(2-mercaptoethyl)adenine functionalized gold nanoparticles (MEA-AuNPs). The presence of Ag+ immediately induced aggregation of MEA-AuNPs, yielding a color change from wine-red to purple. This Ag+-induced aggregation of MEA-AuNPs was monitored by bare eye and UV-vis spectroscopy with a detection limit of 3.3 nM. MEA-AuNPs showed excellent selectivity toward Ag+ compared with other metal ions through interaction between adenine and Ag+. The best detection of Ag+ was achieved at pH 6-9. Furthermore, MEA-AuNPs were applied to detect Ag+ in lake water with low interference. (3) Colorimetric detection of Cd(II) ions based on di(1H-pyrrol-2-yl)methanethione functionalized gold nanoparticles A sensitive and selective colorimetric Cd2+ detection method was developed using di(1H-pyrrol-2-yl)methanethione functionalized gold nanoparticles (DP-AuNPs). Aggregation of DP-AuNPs was induced immediately in the presence of Cd2+, yielding a color change from wine-red to purple. This Cd2+-induced aggregation of DP-AuNPs was monitored using the naked eye and UV-Vis spectroscopy with a detection limit of 16.6 nM. The DP-AuNPs showed excellent selectivity toward Cd2+ compared to other metal ions through the interaction between di(1H-pyrrol-2-yl)methanethione and Cd2+. Optimal detection of Cd2+ was achieved over a pH range from 4 to 9.5. Furthermore, DP-AuNPs were applied to detect Cd2+ in lake water, showing low interference.
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Jowzaee, Sedigheh. "Self-supporting straw tube detectors for the COSY-TOF and PANDA experiments." Praca doktorska, 2014. https://ruj.uj.edu.pl/xmlui/handle/item/62917.
Full textAbstract:
Self-supporting straw tube detectors, which were developed for the COSYTOF experiment, will be also used for tracking charged particles in the PANDA experiment. We investigate the applicability of the PANDA straw tube tracker for identification of protons, charged pions and kaons based on the energy loss information. For this aim, the Garfield program is used to simulate straw tube signals which are convoluted with the transfer function of the front-end electronics. The energy losses in the straw tubes are determined using the information about the Time Over Threshold (TOT) of the straw tube signals and, independently, about the integrated charge of the signals. The separation powers of protons, charged pions and kaons based on the TOT and the integrated charge are comparable and exceed a $5\sigma$ level for particle momenta below 0.6 GeV/c as required for PANDA. We simulate also the gas gain in the straw tubes with the Magboltz and Garfield program. The experimental results for the gain are reproduced after adding 34% Penning transfer rate in the simulation. The straw tube tracker performance is also studied in the COSY-TOF experiment with analysis of the data for the $~pp ! pK+\lambda$ reaction measured with a proton beam at 2.95 GeV/c momentum. The polarization of the beam is determined to be about 87% by analysis the pp elastic scattering events. The analysis using only the straw tube tracker information shows a high reconstruction efficiency of 20% for the $pK+\lambda$ events and the $p\lambda$ invariant mass resolution of 1 MeV/c2. The angular distributions of protons, kaons and $\lambda$-hyperons are determined in the CMS and are fit with the Legendre polynomials. The fitting coefficients show that both S and D-wave contributions are dominant for the proton distribution, whereas in the $\lambda$ distribution all S, P and D-waves are significant. The Dalitz plot with the selected $pK+\lambda$ events shows significant enhancements due to the $p\lambda$-FSI and the $N\Sigma$ cusp effect. The $N\Sigma$ cusp is stronger in the region of the Dalitz plot with the Helicity angle cos ${\Theta}_{pK}^{Rp\lambda} \leq -0.33$, and its angular distribution has a dominant S-wave contribution. The angular distribution of the analyzing power of the proton, kaon and $\lambda$-hyperon is also determined and fit with the associated Legendre polynomials. In the CMS the distributions are more symmetric for the proton compared to kaon and $\lambda$-hyperon. The (S,P)-wave interference contribution to the kaon analyzing power is determined to be about 0.04 at low $p\lambda$ invariant mass, and it can be used to extract the $p\lambda$ spin triplet scattering length.
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Fleurette, Doresty Fonseca. "UCN Detector development for the TRIUMF Neutron EDM experiment." 2016. http://hdl.handle.net/1993/31186.
Full textAbstract:
A new measurement of the neutron electric dipole moment (nEDM) is being
developed at TRIUMF, where a high density source of ultra cold neutrons
(UCN) is currently under construction. A fast, high-efficiency UCN detector
is needed for the experiment, and a 6-Li doped glass scintillation detector is
being explored for this purpose. In this work, simulations and test measurements
were carried out to optimize the light guide design for the new UCN
detector. Acrylic and air-core light guides, the latter with two different reflecting
surfaces, were considered. Three prototype light guides were constructed
and tested, and results were compared with simulations. The best solution
was found to be an acrylic guide, wrapped with mylar foil. For a guide 12
cm in length as required by the experimental layout, a lower limit of approximately
25 photoelectrons per neutron capture was established for the proposed
geometry and photomultiplier configuration.May 2016
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Mathejczyk, Julia Eva. "Innovative NIR fluorescent probes for an improved tumor detection in vivo." Doctoral thesis, 2011. http://hdl.handle.net/11858/00-1735-0000-000D-EFAA-1.
Full text
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Wang, Lee ping, and 王立平. "Highly ordered and Densely packed Au NPs@ePSS for detection of 4-nitrothiophenol by Surface Enhanced Raman Scattering spectroscopy." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/76072984186451398466.
Full textAbstract:
碩士東海大學
化學系
103
Surface enhanced Raman scattering(SERS) spectra are widely used in various fileds, such as biomedical, material, analysis, immunology. Therefore, more research is interested to synthesize the more effective SERS materials. In this study we use TIPB as swelling agent to expand the mesopore sturcture and synthesis at the air-water interface. The gold nanoparticles (NPs) can be direct reduced along the pre-embeded polyoxometalates (photocatalytic agents) at the channel, thereby, forming highly interconnected metal NPs of uniform particle size in the 2D hexagonally packed SiO2. In addition, we were create hot-spot at the junctions between NPs, to application in SERS spectra. Results of small angle X-ray scattering (SAXS) and transmission electron microscopy (TEM) indicate that the mesostructure of as-synthesized silica thin film are 2D-hexagonal, p6mm. The swelling agent, TIPB can epxand the mesostructure effectively. TEM images show the gold NPs were closely pacing and uniformly in mesostructure. X-ray diffraction (XRD) resluts also verify the formation of GNPs. In SERS measurement, ePSS-GNP can enhance 4-MBA and 4-NTP Raman signal effectively. The 4-NTP can be reach the detection limit of 0.05 nano molar. In competitive adsorption experiment, ePSS-GNP are more likely adsorb 4-NTP than 4-MBA.
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Lin, Tsung-Chin, and 林宗縉. "A novel fluorescence-based multiplex PCR assay for rapid simultaneous detection of CEBPA mutations, NPM mutations, and FLT3/ITD in patients with acute myeloid leukemia." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/57350234693352410408.
Full textAbstract:
碩士國立臺灣大學
醫學檢驗暨生物技術學研究所
94
Acute myeloid leukemias (AML) are clonal disorders that are characterized by acquired somatic mutations in hematopoietic progenitors. Mutations of CCAAT/enhancer binding protein α (CEBPA), nucleophosmin (NPM), and Fms-like tyrosine kinase-3 (FLT3) genes have been reported as the most frequent genetic variations in AML patients, and they have the important value in predicting prognosis, especially in those with normal karyotype. Due to the reappearances of the same CEBPA mutation and NPM mutation at relapse, these mutations are suitable as the biomarkers for monitoring minimal residue disease (MRD) in AML. In this study, we designed a novel, rapid and reproducible method with high sensitivity and specificity for simultaneous screening of the CEBPA mutation, NPM mutation, and FLT3/ITD by multiplex PCR coupled with capillary electrophoresis and fluorescence detection. To verify this novel method, 102 AML patients were studied, and the results were then confirmed by PCR-coupled direct sequencing. In addition to two insignificant mutations, 17 distinct mutations in the CEBPA gene and seven in the NPM gene were found in the thirteen (12.7%) and twenty (19.6%) patients respectively, but none had both. Twenty patients (20.2%) had the FLT3/ITD mutation. The overall sensitivity of multiplex PCR for NPM mutation and FLT3/ITD were up to 100%, and that for CEBPA mutation was 89.5%. This novel method can detect mutant allele percentages down to 5% of total DNA and offer the ability to detect early relapse post-therapy. This simple and reproducible method which shows high sensitivity and apparent accuracy may be used as a screening and disease-monitoring tool for AML patients with CEBPA mutation, NPM mutation, and FLT3/ITD in the future.