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Thèses sur le sujet « Pest Classification »

Auteur : Grafiati

Publié le 2 juin 2025

Mis à jour le 31 juillet 2025

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1

Nguyen, Trung Dung. "Economic and environmental effects of Integrated Pest Management program: A case study of Hau Giang province (Mekong Delta)." Technische Universität Dresden, 2018. https://tud.qucosa.de/id/qucosa%3A32720.

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Since many years, the agro-technical programs such as '3 reduction 3 increase', '1 must 5 reduction' and System of Rice Intensification (SRI) have been carried out with definite results. Recently, IPM program (integrated pest management) – a more comprehensive measure (using all possible techniques and methods to keep the pest populations below a level causing economic injury) – has been firstly piloted on a large scale in the Mekong Delta. This paper presents the main results of piloting IPM program in 2,610 hectares during 2014-2017 in Hau Giang province. As results, farmers have better econ

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Georgi, Richard, Klara Pohlink, and Michael Müller. "Einfluss des Pappelblattkäfers in Kurzumtriebsplantagen." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2018. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-237215.

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Der Wiederaustrieb beernteter Pappeln in Kurzumtriebsplantagen erfolgt nicht selten stark verzögert. Ob und inwieweit hierbei der Große Rote Pappelblattkäfer eine Rolle spielt, wurde in einem Versuch mit zwei unterschiedlichen Dichten des Schadinsekts untersucht.

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Sun, Feng. "Computational Hydrosystem Analysis: Applications to the Meijiang and Nankou Catchments in China." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2011. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-70417.

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Hydrosystems are important elements of the hydraulic cycle. With population growth and climatic change impacting water resources, the existing water transport systems need to be reproduced in order to optimize the usage of the precious water resources. The individual flow process i.e. unsaturated soil flow and groundwater flow in porous and fractured media can be expressed by partial differential equations mathematically. The numerical models are generally used to give solutions of these equations with specific conditions. In this work, the numerical solutions are carried out using the scient

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Černocký, Tomáš. "Řízení rizik ve stavebním podniku." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-225973.

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The thesis deals with risk management in the construction company. There are described the concepts related to the issue, that is characteristic of the construction company, risk classification, marking out the risk factors, the determination of significance of risk factors and identification of potential risk factors, consequences on the economic situation of the construction company. In the practical part there are certain risk factors analyzed in the selected building company. In addition to their significance are determined based on the method of risk assessment matrix and consequently the

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Anwar, Syaiful. "Characterization and Classification of Tropical Peat Soils." Kyoto University, 2003. http://hdl.handle.net/2433/148569.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(農学)<br>甲第10388号<br>農博第1367号<br>新制||農||878(附属図書館)<br>学位論文||H15||N3841(農学部図書室)<br>UT51-2003-L29<br>京都大学大学院農学研究科地域環境科学専攻<br>(主査)教授小﨑隆, 教授櫻谷哲夫, 教授東順一<br>学位規則第4条第1項該当

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Georgi, Richard, Christiane Helbig, Michael Müller, Karolin Graichen, and Martin Schubert. "Blattwespen-Massenvermehrung in Kurzumtriebsplantagen mit Pappel." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-115790.

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Bei dem Begang einer Kurzumtriebsplantage bei Großschirma (Sachsen) im August 2011 fiel in einem 500 m x 25 m breiten Streifen der Sorte Max 4 starker Fraß durch Blattwespenlarven auf. Andere Sorten waren nur an den Randbereichen zu Max betroffen. Die Blattwespen hatten, von unten beginnend, 50 % bis 70 % der dreijährigen Pappeltriebe kahl gefressen. Der Hymenoptera-Experte Dr. A. Taeger vom Senkenberg-Institut in Müncheberg bestimmte die Art als Nematus papillosus (Retzius, 1783) (Syn. Nematus melanapsis Hartig 1840). 2012 breitete sich die Massenvermehrung rasch auf angrenzende Flächen aus u

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Georgi, Richard, Christiane Helbig, and Martin Schubert. "Der Rote Pappelblattkäfer in Kurzumtriebsplantagen." Deutscher Landwirtschaftsverlag, 2012. https://tud.qucosa.de/id/qucosa%3A26055.

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Kurzumtriebsplantagen (KUP) bieten für eine Vielzahl von Organismen einen idealen Lebensraum. Einige Insektenarten reagieren darauf mit einer massenhaften Vermehrung. Besonders der Einfluss des Roten Pappelblattkäfers (Chrysomela (=Melasoma) populi) führte in den vergangenen Jahren vermehrt zur Schädigung von KUP. Bisher nehmen die Schäden noch selten bestandesbedrohende Ausmaße an, sind in der Tendenz jedoch klar zunehmend. Immer häufiger kommt es zu relevanten Zuwachsverlusten, verzögertem Austrieb und dem Ausfall einzelner Pflanzen. Daher werden im Rahmen des BMBF-Verbundprojektes „AgroForN

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Helbig, Christiane, Richard Georgi, and Michael Müller. "Die Weidenblattkäfer an Weiden und Pappeln im Kurzumtrieb." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-115903.

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Während der letzten Jahre ist die mit Kurzumtriebsplantagen bestockte Fläche in Deutschland deutlich angestiegen. Derzeit geht man von etwa 5 000 ha aus [1]. Der Hauptteil dieser Flächen ist mit Pappeln bestockt, während Weiden einen geringeren Anteil einnehmen. In anderen Ländern wie Großbritannien oder Schweden ist das Verhältnis dagegen umgekehrt und es finden sich große, zusammenhängende Weidenkulturen. Hier tritt der Blaue Weidenblattkäfer (Phratora vulgatissima) schon seit Jahren als Hauptschadinsekt auf und verursacht die Entlaubung ganzer Plantagen. Auch in Deutschland ist der Blaue We

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Sharif, Mhd Saeed. "An artificial intelligent system for oncological volumetric medical PET classification." Thesis, Brunel University, 2013. http://bura.brunel.ac.uk/handle/2438/13095.

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Positron emission tomography (PET) imaging is an emerging medical imaging modality. Due to its high sensitivity and ability to model physiological function, it is effective in identifying active regions that may be associated with different types of tumour. Increasing numbers of patient scans have led to an urgent need for the development of new efficient data analysis system to aid clinicians in the diagnosis of disease and save decent amount of the processing time, as well as the automatic detection of small lesions. In this research, an automated intelligent system for oncological PET volum

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Mårtensson, Fredrik, and Erik Westberg. "Prioritization of Informative Regions in PET Scans for Classification of Alzheimer's Disease." Thesis, Högskolan i Halmstad, Akademin för informationsteknologi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-45370.

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Alzheimer’s Disease (AD) is a widespread neurodegenerative disease. The disease causes brain atrophy, resulting in memory loss, decreased cognitive ability, and eventually death. There is currently no cure for the disease, but treatment may delay the onset. Therefore, it is crucial to detect the disease at an early stage. Medical imaging techniques, such as Positron Emission Tomography (PET), are heavily applied for this task. In recent years, machine learning approaches have shown success in identifying AD from such images. The thesis presents a pipeline approach to detect, extract and evalua

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Kazadi, Ntolé. "L' Afrique francophone peut-elle financer une politique linguistique?" Universität Leipzig, 1995. https://ul.qucosa.de/id/qucosa%3A33003.

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Al-Ani, Haider Abdul Wahhab Hamdan. "Digital Geotechnical Maps and Classification of Soil Engineering Properties by Using GIS." Thesis, Griffith University, 2015. http://hdl.handle.net/10072/367143.

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Peat is a highly organic and extremely compressible soil. The Surfers Paradise study site area (Gold Coast, Queensland, Australia, located between 27.98° and 28.01° Southing, and between 153.41° and 153.43° Easting (based on the projection of Universal Transverse Mercator UTM zone 56) has a problematic multi thickness peat layer. The peat layer ranges from 0.1 – 7.0 m at different locations and at depths between 1.1 – 40.9 m below the ground surface. To avoid the effects of the highly compressible and low shear strength peat layer, the buildings in the study area have pile foundations. The sit

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Auer, Susann. "Biological control of clubroot (Plasmodiophora brassicae) by an endophytic fungus (Acremonium alternatum)." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-179368.

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The biological control of plant pests with beneficial microbes has become increasingly important over the last decades. Soil microbes such as fungi and bacteria colonise the roots of plants and promote their growth. Some beneficial microbes can trigger a weak plant defence response that enhances the immune response of the plant at subsequent pathogen attacks and therefore increase the resistance of the plant to other invaders. This mechanism is called “priming”. While biocontrol agents are applied against a variety of plant pests fundamental knowledge of the molecular mechanisms of plant-micro

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Pan, Xiaoxi. "Towards FDG-PET image characterization and classification : application to Alzheimer's disease computer-aided diagnosis." Thesis, Ecole centrale de Marseille, 2019. http://www.theses.fr/2019ECDM0008.

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La maladie d’Alzheimer (MA) est la maladie neurodégénérative--incurable et irréversible pour le moment--la plus répandue chez les personnes âgées. On s’attend à ce qu’elle soit diagnostiquée à son stade précoce, Mild Cognitive Impairment (MCI), pour pouvoir intervenir et retarder son apparition. La tomographie par émission de positons au fluorodésoxyglucose (TEP-FDG) est considérée comme une modalité efficace pour diagnostiquer la MA et la phase précoce correspondante, car elle peut capturer les changements métaboliques dans le cerveau, indiquant ainsi des régions anormales. Cette thèse est co

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Faw, Mary E. "A Pedogenic Approach to the Classification of Paleohistosols." Bowling Green State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1334854255.

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Zbib, Hiba. "Segmentation d'images TEP dynamiques par classification spectrale automatique et déterministe." Thesis, Tours, 2013. http://www.theses.fr/2013TOUR3317/document.

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La quantification d’images TEP dynamiques est un outil performant pour l’étude in vivo de la fonctionnalité des tissus. Cependant, cette quantification nécessite une définition des régions d’intérêts pour l’extraction des courbes temps-activité. Ces régions sont généralement identifiées manuellement par un opérateur expert, ce qui renforce leur subjectivité. En conséquent, un intérêt croissant a été porté sur le développement de méthodes de classification. Ces méthodes visent à séparer l’image TEP en des régions fonctionnelles en se basant sur les profils temporels des voxels. Dans cette thèse

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17

Bellot, Benoit. "Améliorer les connaissances sur les processus écologiques régissant les dynamiques de populations d'auxiliaires de culture : modélisation couplant paysages et populations pour l'aide à l'échantillonnage biologique dans l'espace et le temps." Thesis, Rennes 1, 2018. http://www.theses.fr/2018REN1B008/document.

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Une alternative prometteuse à la lutte chimique pour la régulation des ravageurs de culture consiste à favoriser les populations de leurs prédateurs en jouant sur la structure du paysage agricole. L'identification de structures spatio-temporelles favorables aux ennemis naturels peut se faire par l'exploration de scénarios paysagers via une modélisation couplée de paysages et de dynamiques de population. Dans cette approche, les dynamiques de populations sont simulées sur des paysages virtuels aux propriétés structurales contrôlées, et l'observation des motifs de populations associés permet l'i

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Kjellberg, Gustav, and Henrik Kälvegren. "A comparison of classification accuracy between MRI and PET datasets in computer aided diagnosis of Alzheimer's disease." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-229704.

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The number of people suffering from Alzheimer’s disease (AD) is expected to increase rapidly in the coming years. Diagnosing the disease early is key to giving those affected a chance to maintain a higher quality of life. One of the most common ways to detect AD is to visually inspect scans of the patients’ brains. Computer aided diagnosis (CAD)can assist a physician’s judgement when searching for the disease in the brain scans, making the assessment more accurate. Progress has been made in this field throughout the years. This paper compares the machine learning classification accuracy of AD

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Löwe, Rakel, and Ida Schneider. "Automatic Differential Diagnosis Model of Patients with Parkinsonian Syndrome : A model using multiple linear regression and classification tree learning." Thesis, Uppsala universitet, Tillämpad kärnfysik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-413638.

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Parkinsonian syndrome is an umbrella term including several diseases with similar symptoms. PET images are key when differential diagnosing patients with parkinsonsian syndrome. In this work two automatic diagnosing models are developed and evaluated, with PET images as input, and a diagnosis as output. The two devoloped models are evaluated based on performance, in terms of sensitivity, specificity and misclassification error. The models consists of 1) regression model and 2) either a decision tree or a random forest. Two coefficients, alpha and beta, are introduced to train and test the mode

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Werner, Peter, Michael Rullmann, Anke Bresch, et al. "Impact of attenuation correction on clinical [18F]FDG brain PET in combined PET/MRI." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-205215.

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Background: In PET/MRI, linear photon attenuation coefficients for attenuation correction (AC) cannot be directly derived, and cortical bone is, so far, usually not considered. This results in an underestimation of the average PET signal in PET/MRI. Recently introduced MR-AC methods predicting bone information from anatomic MRI or proton density weighted zero-time imaging may solve this problem in the future. However, there is an ongoing debate if the current error is acceptable for clinical use and/or research. Methods: We examined this feature for [18F] fluorodeoxyglucose (FDG) brain PET in

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Katoch, Sunain, Vinay Sharma, and Patit Paban Kundu. "Swelling kinetics of unsaturated polyester and their montmorillonite filled nanocomposite synthesized from glycolyzed PET." Diffusion fundamentals 15 (2011) 4, S. 1-28, 2011. https://ul.qucosa.de/id/qucosa%3A13840.

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The solvent resistance properties of the unsaturated polyster and their montmorillonite filled nanocomposites are studied in acetic through equilibrium swelling method at different temperatures. The kinetics of sorption is studied by using the equation of transport phenomena. The values of ‘n’ in solvent transport equation are found to be below ‘0.5’, showing the non-Fickian or pseudo-Fickian transport in the polymer. The dependence of diffusion coefficient on composition and temperature has been studied for all polymeric samples. The diffusion coefficient of unsaturated polyester samples decr

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Richter, Christian. "Der Einfluss der Atembewegung auf die PET/CT-Schwächungskorrektur." Master's thesis, Technische Universität Dresden, 2007. https://tud.qucosa.de/id/qucosa%3A25045.

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Die Kombination von Positronen-Emissions-Tomographie (PET) und Röntgen-Computertomographie (CT) in Form moderner PET/CT-Geräte ermöglicht die Nutzung der CT-Information zur Korrektur der Photonenschwächung in der PET. Allerdings können Bewegungen, die zum Beispiel durch die Atmung hervorgerufen werden können, zu einer fehlerhaften Schwächungskorrektur führen. Die Einführung von zeitlich aufgelöster Bildgebung für beide Modalitäten (4D-PET/4D-CT) ermöglicht nicht nur die Auflösung von periodischen Bewegungen, sondern auch die Reduktion dieser Fehler in der Schwächungskorrektur. Dazu werden die

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Wooten, A. L., B. C. Lewis, R. Laforest, S. V. Smith, and S. E. Lapi. "Cyclotron Production and PET/MR Imaging of 52Mn." Helmholtz-Zentrum Dresden - Rossendorf, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:d120-qucosa-166214.

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Introduction The goal of this work is to advance the production and use of 52Mn (t½ = 5.6 d, β+: 242 keV, 29.6%) as a radioisotope for in vivo preclinical nuclear imaging. More specifically, the aims of this study were: (1) to measure the excitation function for the natCr(p,n)52Mn reaction at low energies to verify past results [1–4]; (2) to measure binding constants of Mn(II) to aid the design of a method for isolation of Mn from an irradiated Cr target via ion-exchange chromatography, building upon previously published methods [1,2,5–7]; and (3) to perform phantom imaging by positron emissio

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Großmann, Peter. "Satisfiability and Optimization in Periodic Traffic Flow Problems." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-213122.

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Automatically calculating periodic timetables in public railway transport systems is an NP-complete problem – namely the Periodic Event Scheduling Problem (PESP). The original model is restricted to basic periodic timetabling. Extending the model by decisional transport networks with flows induces new possibilities in the timetabling and planning process. Subsequently, the given flexibility results in a generic model extension of PESP that can be applied in subsets of the timetabling process. The successful utilization of this approach is presented for distinct chain paths, duplicated cha

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Horstmann, Annette, Wiebke K. Fenske, and Mohammed K. Hankir. "Argument for a non-linear relationship between severity of human obesity and dopaminergic tone." Obesity reviews (2015) 16, 10, S. 821-830, 2015. https://ul.qucosa.de/id/qucosa%3A14789.

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Alterations in the dopaminergic system have been implicated in both animal and human obesity. However, to date, a comprehensive model on the nature and functional relevance of this relationship is missing. In particular, human data remain equivocal in that seemingly inconsistent reports exist of positive, negative or even no relationships between dopamine D2/D3 receptor availability in the striatum and measures of obesity. Further, data on receptor availability have been commonly interpreted as reflecting receptor density, despite the possibility of an alternative interpretation, namely altera

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Fiedler, Fine. "Anwendung des in-beam PET Therapiemonitorings auf Präzisionsbestrahlungen mit Helium-Ionen." Doctoral thesis, Technische Universität Dresden, 2007. https://tud.qucosa.de/id/qucosa%3A24074.

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Das Hauptziel einer Strahlentherapie, die möglichst vollständige Vernichtung des Tumorgewebes bei einer höchstmöglichen Schonung des umliegenden Gewebes und der Risikoorgane, kann mit Kohlenstoffionen besser als mit Elektronen oder Gammastrahlung erreicht werden. Ionen haben ein inverses Tiefen-Dosisprofil, sie geben einen Großteil ihrer Energie am Ende ihres Weges durch Materie ab. Dieses Energieabgabeverhalten, die wohl definierte Reichweite und die erhöhte biologische Wirksamkeit im Tumor prädestinieren zum Beispiel Kohlenstoffionen für die Behandlung inoperabler, gegen konventionell einges

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Dehnel, M. P., P. Jackle, D. Potkins, et al. "A Mini-PET beamline for optimized proton delivery to the ISOTRACE™ target system." Helmholtz-Zentrum Dresden - Rossendorf, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:d120-qucosa-164794.

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Introduction The ISOTRACE™ Super-Conducting Cyclotron is PMB-Alcen’s redeveloped and modernized version of Oxford Instrument’s OSCAR superconducting cyclotron [1]. Its extracted 80+ mi-croamperes of 12 MeV protons are used for the production of PET radioisotopes. Following the philosophy of Dickie, Stevenson, Szlavik [2] for minimizing dose to personnel, and as developed by Dehnel et al [3,4], and Stokely et al [5], the ISOTRACE™ shall utilize an innovative, light-weight, integrated and self-supporting Mini-Beamline. This permits the relatively high residual radiation fields around PET target

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Price, R. I., R. W. Sheil, R. K. Scharli, et al. "Titanium-45 as a candidate for PET imaging: production, processing & applications." Helmholtz-Zentrum Dresden - Rossendorf, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:d120-qucosa-166284.

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Introduction The 80kD glycoprotein transferrin (TF) and its related receptor (TFR1) play a major role in the recruitment by cancer cells of factors for their multiplication, adhesion, invasion and metastatic potential. Though primarily designed to bind iron and then be internalised into cells with its receptor, TF can also bind most transition metals such as Co, Cr, Mn, Zr, Ni, Cu, V, In & Ga. Under certain conditions TF binds Ti (IV) even more tightly than it does Fe and that this occurs at the N-lobe (as distinct from C) of apoTF. Further, under physiological conditions the species Fe(C)Ti(

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Hinderberger, Philipp. "The Effect of Serum BDNF Levels on Central Serotonin Transporter Availability in Obese Versus Non-Obese Adults: A [11C]DASB Positron Emission Tomography Study." Doctoral thesis, Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-214753.

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Background: Serotonin (5-HT) and its neurotrophic support system, specifically brain-derived neurotrophic factor (BDNF), are thought to modulate energy homeostasis and susceptibility to obesity. Moreover, a polymorphism (5-HTTLPR) in the serotonin reuptake transporter (5-HTT) gene impairs its transcription, thereby altering serotonergic tone and potentially contributing to such susceptibility. This study aims to investigate the effect of BDNF, biallelic 5-HTTLPR, and central in-vivo 5-HTT availability in highly obese versus non-obese subjects using positron emission tomography (PET) and 5-HTT

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Köpsell, Stefan, and Karsten Loesing. "Extended Abstracts of the Fourth Privacy Enhancing Technologies Convention (PET-CON 2009.1)." Technische Universität Dresden, 2009. https://tud.qucosa.de/id/qucosa%3A25925.

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PET-CON, the Privacy Enhancing Technologies Convention, is a forum for researchers, students, developers, and other interested people to discuss novel research, current development and techniques in the area of Privacy Enhancing Technologies. PET-CON was first conceived in June 2007 at the 7th International PET Symposium in Ottawa, Canada. The idea was to set up a bi-annual convention in or nearby Germany to be able to meet more often than only once a year at some major conference.

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Watanabe, Sh, Sa Watanabe, Y. Ohshima, et al. "Isolation of 76Br from irradiated Cu276Se targets using dry distillation." Helmholtz-Zentrum Dresden - Rossendorf, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:d120-qucosa-164264.

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Introduction 76Br is of interest for in vivo PET imaging applications. Its relatively long half-life (16.1 h) allows use not only on small molecules but also proteins which have slow excretion as carrier molecules. Irradiation using a low energy proton beam (~ 20 MeV) on an enriched Cu276Se target, followed by dry distillation with thermal chromatography, is one of the best methods to obtain sufficient amounts of 76Br for clinical applications1,2. However, the thermal chromatography is plagued by poor reproducibility and appears unsuitable for automation of its production, leading us to remove

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Graves, S., C. Lewis, H. Valdovinos, et al. "In vivo cell tracking with 52Mn PET: Targetry, Separation, and Applications." Helmholtz-Zentrum Dresden - Rossendorf, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:d120-qucosa-166432.

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Introduction 52Mn (t½ =5.59 d, β+ = 29.6%, Eβmax = 0.58 MeV) has great potential as a long lived PET isotope for use in cell tracking studies, observation of immunologic response to disease states, or as an alternative to manganese-based MRI contrast agents. Its favorable max positron energy leads to superb imaging resolution, comparable to that of 18F.[1] Manganese is naturally taken up by cells via a multitude of pathways including the divalent metal transporter (DMT1), ZIP8, transferrin receptors (TfR), store-operated Ca2+ channels (SOC-Ca2+), and ionotropic glutamate receptor Ca2+ channel

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Blaske, Susann. "Weiterentwicklung und Testung einer Auswerte-Software zur Analyse von Beta-Amyloid Hirn-PET-Daten." Doctoral thesis, Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-214479.

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Alzheimer-Demenz ist eine Erkrankung, die durch den demografischen Wandel immer mehr an Bedeutung gewinnt. Eine effektive und frühzeitige Diagnostik ist daher entschei-dend. Da die neuropsychiatrische Testung mit einer diagnostischen Unsicherheit von 10% bis 30% zu ungenau ist und auch erst bei Ausbruch der Symptomatik eine Alzheimer-Demenz diagnostiziert werden kann, wurde auf Parameter wie Beta-Amyloid zurückgegrif-fen. Beta-Amyloid stellt einen Hauptbestandteil der Alzheimer-Demenz Pathologie dar und ist bereits vor Ausbruch der Symptome nachweisbar. Da die visuelle Analyse, welche die Beta

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Bizabani, Christine. "The diversity of root fungi associated with Erica species occurring in the Albany Centre of Endemism." Thesis, Rhodes University, 2015. http://hdl.handle.net/10962/d1018575.

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South Africa has the highest species diversity of ericaceous plants belonging to the Erica genus. There are over 850 identified species in the Cape Floral Region. The Albany Centre of Endemism (ACOE) is located within this region and is a hotspot of diversity consisting of various plant genera. The success of Erica plants is ubiquitously attributed to mycorrhizal relationships they engage in with a diverse group of fungi. This symbiosis is known as the ericoid mycorrhizal (ERM) association. The overall aim of this study was to establish the diversity of root fungi associated with Erica plants

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Jensen, M., T. Eriksson, G. Severin, M. Parnaste, and J. Norling. "Experimental yields of PET radioisotopes from a prototype 7.8 MeV cyclotron." Helmholtz-Zentrum Dresden - Rossendorf, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:d120-qucosa-166159.

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Introduction The worldwide use of PET has proven beyond dispute the importance for both routine diagnosis and physiological, oncological and pharmacological research. In many ways the present success of PET relies on the mature technology of PET compact medical cyclotrons. As long time developers of new targets, isotopes and com-pounds, we have been inclined to look for new block-buster applications, high power targets and sustainable ways of embracing the GMP and regional distribution, but recent pioneering development [1] around very small cyclotrons and “embedded synthesis and qc” has point

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Ellison, P. A., F. Chen, T. E. Barnhart, R. J. Nickles, W. Cai, and O. T. DeJesus. "Production and isolation of 72As from proton irradiation of enriched 72GeO2 for the development of targeted PET/MRI agents." Helmholtz-Zentrum Dresden - Rossendorf, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:d120-qucosa-166178.

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Introduction Two current major research topics in nuclear medicine are in the development of long-lived positron-emitting nuclides for imaging tracers with long biological half-lives and in theranostics, imaging nuclides which have a chemically analogous therapy isotope. As shown in TABLE 1, the radioisotopes of arsenic (As) are well suited for both of these tasks with several imaging and therapy isotopes of a variety of biologically relevant half-lives accessible through the use of small medical cyclotrons. The five naturally abundant isotopes of germanium are both a boon and challenge for th

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Franck, Dominic. "Radiofluorinated cyclobutyl group for increased metabolic stability using tyrosine derivatives as model system." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-99003.

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The metabolic stability of these tracers is, in addition to its affinity and selectivity, an important factor for a successful disease diagnosis. PET tracers and all other drugs are subject to biotransformation which can form metabolites as a part of the inactivation or detoxification process of the human body. These metabolites may result in a higher background which has a detrimental influence on the PET image quality or can even make imaging impossible. The aim of this work was to investigate whether [18F]fluorocyclobutyl rings can be introduced into biologically active small molecules to i

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Dukart, Jürgen. "Contribution of FDG-PET and MRI to improve Understanding, Detection and Differentiation of Dementia." Doctoral thesis, Universitätsbibliothek Leipzig, 2011. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-66495.

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Progression and pattern of changes in different biomarkers of Alzheimer’s disease (AD) and frontotemporal lobar degeneration (FTLD) like [18F]fluorodeoxyglucose positron emission tomography (FDG-PET) and magnetic resonance imaging (MRI) have been carefully investigated over the past decades. However, there have been substantially less studies investigating the potential of combining these imaging modalities to make use of multimodal information to further improve understanding, detection and differentiation of various dementia syndromes. Further the role of preprocessing has been rarely addres

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Wieckiewicz, Mieszko, Eric Wolf, Gert Richter, Heike Meissner, and Klaus Boening. "New Concept of Polymethyl Methacrylate (PMMA) and Polyethylene Terephthalate (PET) Surface Coating by Chitosan." Molecular Diversity Preservation International (MDPI), 2016. https://tud.qucosa.de/id/qucosa%3A30051.

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Chitosan is known for its hemostatic and antimicrobial properties and might be useful for temporary coating of removable dentures or intraoral splints to control bleeding after oral surgery or as a supportive treatment in denture stomatitis. This study investigated a new method to adhere chitosan to polymethyl methacrylate (PMMA) and polyethylene terephthalate (PET). There were 70 cylindrical specimens made from PMMA and 70 from PET (13 mm diameter, 6 mm thickness). The materials with ten specimens each were sandblasted at 2.8 or 4.0 bar with aluminum oxide 110 μm or/and aluminum oxide coated

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Na, Hana. "A study on detection of risk factors of a toddler's fall injuries using visual dynamic motion cues." Thesis, Brunel University, 2009. http://bura.brunel.ac.uk/handle/2438/3214.

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The research in this thesis is intended to aid caregivers’ supervision of toddlers to prevent accidental injuries, especially injuries due to falls in the home environment. There have been very few attempts to develop an automatic system to tackle young children’s accidents despite the fact that they are particularly vulnerable to home accidents and a caregiver cannot give continuous supervision. Vision-based analysis methods have been developed to recognise toddlers’ fall risk factors related to changes in their behaviour or environment. First of all, suggestions to prevent fall events of you

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Коток, В. Ю. "Оцінка конкурентоспроможності та удосконалення торгівлі зоотоварами на прикладі магазину «Бурундук» м. Чернігів". Thesis, Чернігів, 2020. http://ir.stu.cn.ua/123456789/21660.

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Коток, В. Ю. Оцінка конкурентоспроможності та удосконалення торгівлі зоотоварами на прикладі магазину «Бурундук» м. Чернігів: магістерська робота : 076 Підприємництво, торгівля та біржова діяльність / В. Ю. Коток ; керівник роботи Денисенко Т. М. ; Національний університет «Чернігівська політехніка», кафедра підприємництва і торгівлі. – Чернігів, 2020. – 58 с.<br>Об’єкт дослідження - зоотовари та магазин «Бурундук» м. Чернігів. Предмет дослідження - асортимент зоотоварів, організація торгівлі та конкурентоспроможність магазину «Бурундук». Метою випускної кваліфікаційної роботи є проведення оц

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Ellison, P. A., A. M. Jedele, T. E. Barnhart, R. J. Nickles, D. Murali, and O. T. DeJesus. "Production of [11C]cyanide for the synthesis of indole-3-[1-11C]acetic acid and PET imaging of auxin transport in living plants." Helmholtz-Zentrum Dresden - Rossendorf, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:d120-qucosa-166188.

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Introduction Since its development by Al Wolf and colleagues in the 1970s1, [11C]cyanide has been a useful synthon for a wide variety of reactions, most notably those producing [1-11C]-labeled amino acids2. However, despite its position as rote gas-phase product, the catalytic synthesis is difficult to optimize and often only perfunctorily dis-cussed in the radiochemical literature. Recently, [11C]CN– has been used in the synthesis of indole-3-[1-11C]acetic acid ([11C]IAA), the principal phytohormone responsible for a wide variety of growth and development functions in plants3. The University

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Stumpp, Patrick. "PET/MRT in der onkologischen Diagnostik mit dem Schwerpunkt Kopf-Hals-Tumoren." Doctoral thesis, Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-214783.

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Erst seit 2010 sind kombinierte Positronenemissionstomographie- Magnetresonanztomographie-Geräte (PET/MRT) zur hybriden Bildgebung verfügbar. Die mit der Entwicklung der Geräte verbundenen Hoffnungen bezüglich der onkologischen Diagnostik lagen zunächst auf einer verbesserten Genauigkeit in der Tumordetektion im Vergleich zur PET/CT. Rasch wurde jedoch deutlich, dass insbesondere die Möglichkeit der non-invasiven, multiparametrischen Charakterisierung von Tumorerkrankungen einen wesentlichen Vorteil der PET/MRT gegenüber der PET/CT darstellt. Der im Universitätsklinikum Leipzig AöR 2011 instal

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McCarthy, Jenny. "Remote sensing for detection of landscape form and function of the Okavango Delta, Botswana." Doctoral thesis, KTH, Civil and Environmental Engineering, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3314.

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Hong, Tao. "Transient Avalanche Oscillation of IGBTs Under High Current." Doctoral thesis, Universitätsverlag der Technischen Universität Chemnitz, 2014. https://monarch.qucosa.de/id/qucosa%3A20227.

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Radio frequency oscillations up to several hundreds of MHz were observed during turn-off the high-current conducting IGBTs. They are described in this work as Transient Avalanche oscillations. Other than PETT oscillations that happen in the tail current phase, this oscillation appears during the rise of collector-emitter voltage VCE and during the fall of the collectoremitter current ICE. The turn-off process of IGBTs are investigated with the help of measurements, the circuit- and device-simulations to reveal the working mechanisms of transient high-frequency oscillations. For the first time

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Kluge, Regine, Lidia Chavdarova, Martha Hoffmann, et al. "Inter-reader reliability of early FDG-PET/CT response assessment using the Deauville Scale after 2 cycles of intensive chemotherapy (OEPA) in Hodgkin’s Lymphoma." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-204087.

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Purpose: The five point Deauville (D) scale is widely used to assess interim PET metabolic response to chemotherapy in Hodgkin lymphoma (HL) patients. An International Validation Study reported good concordance among reviewers in ABVD treated advanced stage HL patients for the binary discrimination between score D1,2,3 and score D4,5. Inter-reader reliability of the whole scale is not well characterised. Methods: Five international expert readers scored 100 interim PET/CT scans from paediatric HL patients. Scans were acquired in 51 European hospitals after two courses of OEPA chemotherapy (acc

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Aralova, Dildora, Kristina Toderich, Ben Jarihani, et al. "Environmental resilience of rangeland ecosystems: Assessment drought indices and vegetation trends on arid and semi-arid zones of Central Asia." SPIE, 2016. https://tud.qucosa.de/id/qucosa%3A35118.

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The Central Asian (CA) rangelands is a part of the arid and semi-arid ecological zones and spatial extent of drylands in CA (Tajikistan, Kazakhstan, Uzbekistan, Kyrgyzstan, and Turkmenistan) is vast. Projections averaged across a suite of climate models, as measured between 1950-2012 by Standardised Precipitation-Evapotranspiration Index (SPEI) estimated a progressively increasing drought risks across rangelands (Turkmenistan, Tajikistan and Uzbekistan) especially during late summer and autumn periods, another index: Potential Evapotranspiration (PET) indicated drought anomalies for Turkmenist

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Kodewitz, Andreas. "Méthodes pour l'analyse de grands volumes d'images appliquées à la détection précoce de la maladie d'Alzheimer par analyse de PDG-PET scans." Phd thesis, Université d'Evry-Val d'Essonne, 2013. http://tel.archives-ouvertes.fr/tel-00846689.

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Dans cette thèse, nous explorons de nouvelles méthodes d'analyse d'images pour la détection précoce des changements métaboliques cérébraux causés par la maladie d'Alzheimer (MA). Nous introduisons deux apports méthodologiques que nous appliquons à un ensemble de données réelles. Le premier est basé sur l'apprentissage automatique pour créer une carte des informations de classification pertinente dans un ensemble d'images. Pour cela nous échantillonnons des blocs de voxels de l'image selon un algorithme de Monte-Carlo. La mise en oeuvre d'une classification basée sur ces patchs 3D a pour conséq

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Anjum, Ayesha. "Differentiation of alzheimer's disease dementia, mild cognitive impairment and normal condition using PET-FDG and AV-45 imaging : a machine-learning approach." Toulouse 3, 2013. http://thesesups.ups-tlse.fr/2238/.

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Nous avons utilisé l'imagerie TEP avec les traceurs F18-FDG et AV45 en conjonction avec les méthodes de classification du domaine du "Machine Learning". Les images ont été acquises en mode dynamique, une image toutes les 5 minutes. Les données ont été transformées par Analyse en Composantes Principales et Analyse en Composantes Indépendantes. Les images proviennent de trois sources différentes: la base de données ADNI (Alzheimer's Disease Neuroimaging Initiative) et deux protocoles réalisés au sein du centre TEP de l'hôpital Purpan. Pour évaluer la performance de la classification nous avons e

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Laitinen, J. (Jarmo). "Vegetational and landscape level responses to water level fluctuations in Finnish, mid-boreal aapa mire – aro wetland environments." Doctoral thesis, University of Oulu, 2008. http://urn.fi/urn:isbn:9789514288791.

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Abstract Gradient, which is largely considered to be related to water level in mires, is referred to as a microtopographic mud bottom to carpet to lawn to hummock level gradient or the hummock level to intermediate level (lawn) to flark level gradient. The relationship of this vegetation gradient to various physical water level characteristics was studied. The general classification used in the present summary paper divides the aro vegetation of the inland of Northern Ostrobothnia into two main groups: (a) treeless fen aro vegetation (Juncus supinus, Carex lasiocarpa, Rhynchospora fusca, Mol

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