published_or_final_version / abstract / Surgery / Doctoral / Doctor of Philosophy

Work hypothesis: Different pea (Pisum sativum L.) morphotypes respond differently to various anthropogenic factors. This can be related with an alteration of plant metabolism and with changes of photosynthetic pigments and biochemical indexes. Work aim and the tasks: To investigate the effects of ozone and UV-B radiation on different pea (Pisum sativum L.) morphotypes under changing climatic conditions and to measure plant reaction to the effects of ozone and UV-B radiation. 1.To investigate the effects of ozone and UV-B radiation on the morphometric parameters of different pea morphotypes under changing climatic conditions; 2.To investigate the effects of ozone and UV-B radiation on the photosynthetic pigments of different pea morphotypes under changing climatic conditions; 3.To investigate the effects of ozone and UV-B radiation on the biochemical indexes of different pea morphotypes under changing climatic conditions. Novelty of the scientific work. For the first time the effects of the near-ground ozone and UV-B radiation on two different pea (Pisum sativum L.) morphotypes (leafy ‘Ilgiai‘ and semi-leafless ‘Profi‘) were investigated under changing climate conditions. The response of these plants to the effects of ozone and UV-B radiation was measured. Defended propositions The different pea morphotypes respond differently to the effect of anthropogenic factors; The morphometric parameters of the different pea morphotypes alters unequally when responding to the... [to full text] / Darbo hipotezė: Skirtingų morfotipų žirniai (Pisum sativum L.) nevienodai reaguoja į įvairius antropogeninius veiksnius. Tai gali būti susiję su augalų metabolizmo pakitimu, fotosintetinių pigmentų, bei biocheminių rodiklių kitimu. Darbo tikslas: Ištirti ozono ir UV-B spinduliuotės poveikį skirtingų morfotipų žirniams (Pisum sativum L.) kintančiomis klimato sąlygomis, bei nustatyti jų reakciją į ozono ir UV-B spinduliuotės poveikį. Uždaviniai: 1.Kintančiomis klimato sąlygomis ištirti ozono bei UV-B spinduliuotės poveikį, skirtingų morfotipų žirnių morfometriniams parametrams; 2.Kintančiomis klimato sąlygomis ištirti ozono ir UV-B spinduliuotės poveikį, skirtingų morfotipų žirnių fotosintetiniams pigmentams; 3.Kintančiomis klimato sąlygomis ištirti ozono poveikį, skirtingų morfotipų žirnių biocheminiams rodikliams. Mokslinis darbo naujumas. Pirmą kartą buvo ištirtas priežemio ozono ir UV-B spinduliuotės poveikis, kintančiomis klimato sąlygomis, skirtingų morfotipų sėjamajam žirniui (Pisum sativum L.) lapuotiems ‘Ilgiai‘ bei pusiau belapiams ‘Profi‘, bei nustatyta jų reakcija į ozono ir UV-B spinduliuotės poveikį. Ginamieji teiginiai Skirtingų morfotipų žirniai nevienodai reaguoja į antropogeninių veiksnių poveikį; Skirtingų morfotipų žirnių morfometriniai parametrai, nevienodai skirtingai kinta nuo poveikio laiko, bei poveikio stiprumo; Skirtingų morfotipų žirnių fotosintezės mechanizmai yra nevienodi, sąlygojantys apsaugą nuo fotooksidacinio streso; Skirtingų morfotipų žirnių... [toliau žr. visą tekstą]

Baigiamajame magistro darbe nagrinėjama automatinio priklausomo stebėjimo (ADS-B) sistema pakeisianti įprastinę oro erdvės stebėjimo radarų sistemą. Darbe išnagrinėti pagrindiniai sistemos veikimo principai, jos pritaikymas ir sudėtinės dalys, kartu su signalų formavimo ypatybėmis. Atliktas tyrimas sudarytas iš 9 atskirų bandymų apimančių sistemos kokybės patikros, signalo sudėties ir patikimumo įvertinimą. Tyrimas atliktas naudojant atsakiklių tyrimų stendą, kuris atitinka antžeminį ADS-B sistemos segmentą ir orlaivyje įmontuotą atsakiklį, kuris atitinką vartotojo segmentą. Tyrimo metu išnagrinėjamos ADS-B sistemos komunikacijos segmento savybės juos lyginant su naujausia literatūra ir techniniais sistemos įgyvendinimo sprendimais. Išnagrinėjus gautus rezultatus ir literatūrą pateikiamos sistemos tobulinimo rekomendacijos ir tolesnio tyrimo metodikos patobulinimai ir siūlymai. Darbą sudaro 10 dalių: įvadas, literatūros apžvalga, analitinė dalis, bandymų metodika, tyrimo aprašymas, darbo apžvalga, išvestiniai duomenys, išvados, literatūros sąrašas. Darbo apimtis – 71 p. teksto be priedų, 47 pav., 7 lent., 30 bibliografinių šaltinių. Atskirai pridedami darbo priedai. / This master‘s thesis explores automatic dependant surveillance – broadcast system (ADS-B) which will replace conventional radar based surveillance system in aviation air control management. Thesis consists of general overview of the system operation, its applicability, integration and structure with signal formatting possibilities. Field analysis was made which consists of 9 tests including system quality parameters, signal structure and reliability tests. Analysis was made by transponder interrogation device, referring to ground segment of ADS-B system, and transponder device mounted in aircraft, referring to ADS-B system users. Analysis includes ADS-B system communication segment features, literature analysis together with system implementation decisions. There is listed the conclusions of tests data together with suggestions for further system analysis and recommendations for system implementation possibilities. Thesis consist of: 71 p. text without appendixes, 47 pictures, 7 tables, 30 bibliographical entries. Appendixes included.

Mémoire numérisé par la Direction des bibliothèques de l'Université de Montréal.

Thèse numérisée par la Direction des bibliothèques de l'Université de Montréal.

No description available.

Self-organizing maps (SOMs) are self-organized projections of high dimensional data onto a low, typically two dimensional (2D), map wherein vector similarity is implicitly translated into topological closeness in the 2D projection. They are thus used for clustering and visualization of high dimensional data. However it is often challenging to interpret the results due to drawbacks of currently used methods for identifying and visualizing cluster boundaries in the resulting feature maps. In this thesis we introduce a new phase to the SOM that we refer to as the Cluster Reinforcement (CR) phase. The CR phase amplifies within-cluster similarity with the consequence that cluster boundaries become much more evident. We also define a new Boundary (B) matrix that makes cluster boundaries easy to visualize, can be thresholded at various levels to make cluster hierarchies apparent, and can be overlain directly onto maps of component planes (something that was not possible with previous methods). The combination of the SOM, CR phase and B-matrix comprise an automated method for improved identification and informative visualization of clusters in high dimensional data. We demonstrate these methods on three data sets: the classic 13- dimensional binary-valued “animal” benchmark test, actual 60-dimensional binaryvalued phonetic word clustering problem, and 3-dimensional real-valued geographic data clustering related to fuel efficiency of vehicle choice.

DAMOS is an online annotated database (MySql) of all published texts of Mycenaean, the earliest attested Greek dialect. The texts are annotated for epigraphical and linguistic features (morphology, syntax, semantics) and provided with a rich set of metadata, which also include chronological and geographical data. Genre (administrative accounts) and physical features (brevity and often fragmentary state) of the Mycenaean texts, and especially their script (Linear B), not well suited for rendering the Greek language, pose challenges to the interpretation of the texts, which often result in multiple possible values of the data at all levels – epigraphical, linguistic, metadata. These may often be organized in competing sets of values, which form coherent different overarching hypotheses on e.g. the grammar of the language or the dating of an archive. These competing values need, thus, to be stored and meaningfully organized in the database. The presentation focuses on how chronological and geographical data (both about the texts and contained in the texts) and their often multiple possible values are dealt with in the arrangement of the database structure of DAMOS.

Thèse numérisée par la Division de la gestion de documents et des archives de l'Université de Montréal.

In this thesis we present an alternative to quantiles, which is known as expectiles. At first we define the notion of expectile of a distribution of ran- dom variable and then we show some of its basic properties such as linearity or monotonic behavior of τ-th expectile eτ in τ. Let (Y, X), Y ∈ R, X ∈ Rp be a ran- dom vector. We define conditional expectile of Y given X = x, which we denote eτ (Y |X = x). We introduce model of expectile regression eτ (Y |X = x) = x⊤ βτ , where βτ ∈ Rp and we examine asymptotic behavior of estimate of the regression coefficients βτ and ways how to calculate it. Further we introduce semiparametric expectile regression, which generalizes the previous case and adds restrictions on the estimate of the regression coefficients which enforce desired properties such as smoothness of fitted curves. We illustrate the use of theoretical results on me- chanographic data, which describe dependence of power and force of a jump on age of children and adolescents aged between 6 and 18. Keywords: expectiles, expectile regression, quantiles, penalized B-splines 1