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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Plėšriųjų žvėrių ir tetervinų populiacijos būklė Praviršulio tyrelio valstybiniame botaniniame – zoologiniame draustinyje 2008 - 2009 metais / Prey animals and the heath-cock population status in Praviršulis tyrelis public botanical - zoological reserve in 2008 – 2009

Poškus, Vytautas 15 June 2009 (has links)
Magistro darbe tiriama plėšriųjų žvėrių ir tetervinų populiacijos būklė. Tyrimo objektas – Radviliškio rajone esančiame Praviršulio tyrelio valstybinio botaninio - zoologinio draustinyje sutinkami plėšrieji žvėrys ir tetervinai. Darbo tikslas - nustatyti plėšriųjų žvėrių ir tetervinų populiacijos būklę Praviršulio tyrelio valstybiniame botaniniame – zoologiniame draustinyje. Siekiant darbo tikslo buvo iškelti tokie uždaviniai: 1) ištirti draustinio plėšriųjų žvėrių rūšinę sudėtį, atskirų rūšių gausą bei tankį; 2) apskaičiuoti tetervinų gausą bei tankį; 3) apskaičiuoti plėšrūnų ir aukų santykį bei jo atitikimą ekologiniam santykiui; 4) ištirti plėšriųjų žvėrių ir tetervinų populiacijos dinamiką. Tyrimo metodai - Lietuvos ir užsienio autorių mokslinės literatūros analizė bei sintezė, duomenų grupavimas, statistiniai metodai, grafinis vaizdavimas. Tyrimo laikotarpis apima 2008 -2009 metus. Darbo rezultatai: buvo išstudijuota lietuvių ir užsienio autorių moksliniais darbai bei periodinė literatūra apie medžiojamosios faunos elgseną įtakojančius veiksnius, buvo ištirta draustinio plėšriųjų žvėrių rūšinė sudėtis, apskaičiuota žvėrių gausa, bendras tankis, ištirta žvėrių populiacijos dinamika. Gauti tokie rezultatai: 2008-2009 metais plėšriųjų žvėrių gausa didėjo. Apskaičiuoti plėšriųjų žvėrių ir aukų santykiai gana labai neatitiko ekologinių. Tetervinų gausa 2008-2009 metais sumažėjo. / Master's work examined prey animals, and heath-cock population of the state. Object of research – Carnivora and heath-cocks met in the territory of Praviršulis tyrelis public botanical - zoological reservation in Radviliškis district. Purpose of the Paper – estimate the state of Carnivora and heath-cocks in the Praviršulis tyrelis public botanical - zoological reservation. Achieving the purpose the following goals were raised: 1) to determine the varietal composition, abundance and density of certain species of the Carnivora in the reservation; 2) to determine the abundance and density of heath-cocks in the reservation. 3) to determine the ratio between predators and preys, and its conformity with ecological ratio; 4) to explore the dynamics of Carnivora and the heath-cock populations. Methods of research - analysis and synthesis of Lithuanian and foreign scientific literature, data grouping, statistical methods, graphical presentation. The research period is the years 2008 - 2009. The results: there was studying scientific works of Lithuanian and foreign authors and periodic literature about the factors influencing the behaviours of fair game, there was determined the abundance of animals, general density, determined the dynamics of animals population. Obtain the following results: 2008-2009, increased the abundance of prey animals. Calculate prey animals and the relationship between the victims is quite inconsistent with the ecological. Hheath-cocks abundance declined in 20... [to full text]
2

Vyhodnocení přirozené reprodukce bažanta obecného ve vybraných bažantnicích LZ Židlochovice, LČR, s.p. / The evaluation of natural reproduction of the red-necked pheasant (Phasianus colchicus) in the pheasantry owned by the forest-empire Židlochovice, LČR, s.p.

VLACH, Marek January 2007 (has links)
The study is dealing with appreciation of natural reproduction of ring-necked Pheasant (Phasianus colchicus) in a pheasantry owned by LČR,s.p. By one of the purpose was set the appreciation of the pheasantry and current natural conditions in accordance with public notice no.7/2003 in a full range. The background of the pheasantry is complied with requirements by the public notice. Another objective was monitoring running of Pheasant males. Next objective was to analysed and evaluated a natural reproduction ability of Pheasant females in the pheasantry. There was found very low ability of reproduction in the pheasantry. As the main reasons for low reproduction ability of Pheasant females were found mostly higher population pressure of predators and depressed ability of making nests by Pheasant females of intensive artificial breeding.
3

李旦與顏思齊之研究 / Li Tan & Yan Sih Jhai

李碩珞 Unknown Date (has links)
十七世紀中期,東亞海域上大家最耳熟能詳的人物莫過於是鄭成功。鄭成功不僅在東亞海域上佔有一席之地,在台灣也被多數人認為是「開臺聖王」。對於他種種的相關事蹟各有不同的記載與描述,有人認為鄭成功為初到臺灣的首位漢人。然而在鄭成功之前臺灣沒有漢人到來,對於此點筆者對其保留懷疑的態度。臺灣地處要塞,與中國的距離又近,在當時海上貿易頗為興盛的時代,此說較不太可能。 關於鄭成功與其父鄭芝龍的研究著述頗豐,但對於鄭芝龍以前的東亞海上勢力卻是較少著墨,李旦與顏思齊二人即是一例。李旦與顏思齊在十七世紀初期的東亞海域上佔有一席之地,然而在現今學界對於二人的看法不一,有學者主張李旦與顏思齊因其事業版圖及遭遇等等相似,因此認為兩人為同一人;但也有學者主張兩人從籍貫到死亡地點時間等等均不相同;因此主張李旦與顏思齊為不同人。對於此兩種截然不同之說法,筆者對此產生了好奇。是由於不同史料所導致不同的說法,還是相同的史料,卻佐以不同的說法,產生相反的結果,這些都是筆者的疑問。 因此本文蒐集了至今學者對於李旦及顏思齊的看法及理由為何,重新審慎檢視,並輔以不少的日文史料及西文史料,也羅列了不少臺灣在地傳說,希望從各方面的資料中,對於二人間的爭議,能有一個較為全面的認識與再探討。
4

Problèmes autour de courbes élliptiques et modulaires / Topics in elliptic and modular curves

Sha, Min 27 September 2013 (has links)
Cette thèse se divise en deux parties. La première est consacrée aux points entiers sur les courbes modulaires, et l'autre se concentre sur les courbes elliptiques à couplages.Dans la première partie, nous donnons quelques majorations effectives de la hauteur des j-invariants des points entiers sur les courbes modulaires quelconques associées aux sous-groupes de congruence sur les corps de nombres quelconques en supposant que le nombre des pointes est au moins 3. De plus, dans le cas d'un groupe de Cartan non-déployé nous fournissons de meilleures bornes. Comme application, nous obtenons des résultats similaires pour certaines courbes modulaires avec moins de 3 pointes.Dans la deuxième partie, nous donnons une nouvelle majoration du nombre de classes d'isogénie de courbes elliptiques ordinaires à couplages. Nous analysons également la méthode de Cocks-Pinch pour confirmer certaines de ses propriétés communément conjecturées. Par ailleurs, nous présentons la première analyse heuristique connue qui suggère que toute construction efficace de courbes elliptiques à couplages peut engendrer efficacement de telles courbes sur tout corps à couplages. Enfin, quelques données numériques allant dans ce sens sont données. / This thesis is divided into two parts. One is devoted to integral points on modular curves, and the other concerns pairing-friendly elliptic curves. In the first part, we give some effective upper bounds for the $j$-invariant of integral points on arbitrary modular curves corresponding to congruence subgroups over arbitrary number fields assuming that the number of cusps is not less than 3. Especially, in the non-split Cartan case we provide much better bounds. As an application, we get similar results for certain modular curves with less than three cusps. In the second part, a new heuristic upper bound for the number of isogeny classes of ordinary pairing-friendly elliptic curves is given. We also heuristically analyze the Cocks-Pinch method to confirm some of its general consensuses. Especially, we present the first known heuristic which suggests that any efficient construction of pairing-friendly elliptic curves can efficiently generate such curves over pairing-friendly fields. Finally, some numerical evidence is given.
5

Problèmes autour de courbes élliptiques et modulaires

Sha, Min 27 September 2013 (has links) (PDF)
Cette thèse se divise en deux parties. La première est consacrée aux points entiers sur les courbes modulaires, et l'autre se concentre sur les courbes elliptiques à couplages.Dans la première partie, nous donnons quelques majorations effectives de la hauteur des j-invariants des points entiers sur les courbes modulaires quelconques associées aux sous-groupes de congruence sur les corps de nombres quelconques en supposant que le nombre des pointes est au moins 3. De plus, dans le cas d'un groupe de Cartan non-déployé nous fournissons de meilleures bornes. Comme application, nous obtenons des résultats similaires pour certaines courbes modulaires avec moins de 3 pointes.Dans la deuxième partie, nous donnons une nouvelle majoration du nombre de classes d'isogénie de courbes elliptiques ordinaires à couplages. Nous analysons également la méthode de Cocks-Pinch pour confirmer certaines de ses propriétés communément conjecturées. Par ailleurs, nous présentons la première analyse heuristique connue qui suggère que toute construction efficace de courbes elliptiques à couplages peut engendrer efficacement de telles courbes sur tout corps à couplages. Enfin, quelques données numériques allant dans ce sens sont données.
6

Effects on the reproductive system in domestic fowl (Gallus domesticus) after embryonic exposure to estrogenic substances /

Hermansson, Alexandra, January 2007 (has links) (PDF)
Diss. (sammanfattning) Uppsala : Sveriges lantbruksuniv., 2007. / Härtill 4 uppsatser.
7

Displays of Deference, Projections of Power : The English East India Company in Japan, 1615–1622

Hioki, Tami January 2023 (has links)
From 1613 to 1623, the English East India Company (EIC) maintained a trading post at Hirado, Japan. This trading post was one of the first that the EIC established, and because England was far from the empire it would one day become, Company members had to adjust to local customs and respect the laws of Japan in order to conduct business there. Among the many adaptations the EIC factors underwent, frequent visits to the Tokugawa shogun’s court were required of the EIC. This thesis will investigate the EIC’s journeys to the shogun’s court as well as its time at court to study the way in which the English interacted with the Japanese and conformed to Japanese society. This thesis will also discuss practices of gift giving in which the English participated. This study uses the diary of Richard Cocks, the head of the Hirado trading post, to focus on the period between 1615 and 1622. Alison Games’s concept of “cosmopolitanism” and Sanjay Subrahmanyam’s concept of “connected histories” frame this study to demonstrate how England’s and the EIC’s relatively weak status at the beginning of the seventeenth century required EIC members to assimilate into Japanese society. The EIC’s experiences while traveling through Japan, visiting the shogun’s court, and exchanging gifts emphasized the power difference between the EIC and the Tokugawa shogunate and other high-ranking Japanese. The policies the shogunate enforced to strengthen its authority and prevent rebellions also required the EIC to demonstrate their subservience to the shogun’s power, which affected the Company’s ability to trade. Since the English did not hold the authority to make demands of the shogun, they were forced to abide by the laws and customs of the land, which only further served to emphasize their subordinate position to the shogunate.

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