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  • Thesis

  • Authors: Cheng, Shih-Fen (2006)

  • A complex system is an artificial system that cannot be modeled analytically or optimized in an effective manner, usually because it possesses the following properties: (1) the system can only be modeled as a simulation, (2) the size of the problem is untenable, so that even if the system could be modeled analytically, it would be impractical to solve it exactly, (3) necessary information required for problem solving is distributed in nature. This thesis presents methods for modeling and optimizing systems with the above challenging properties. We first discuss the important modeling decision of whether to include stochasticity. By employing a real-world case study, we show that a st...

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  • Thesis

  • Authors: Cong, Xin (2006)

  • Chapter 1 provides an introduction to the significance and methodology of gas-phase non-covalent complex study. It also explains the mechanism, instrumentation, application of electrospray ionization (ESI) source and Fourier transform mass spectrometry (FTMS). A home-built 4.7T ESI-FTMS employed in experiments is presented. Chapter 2 presents evidence of the gas-phase zwitterionic amino acids in the cavity of cyclodextrin. Zwitterionic amino acids are discovered in a ternary complex with underivatized (3-cyclodextrin unlikely with derivatized [3-cyclodextrin used in previous reports. Ternary complexes are produced after a proton transfer of alkylamine from carboxyl group of amino aci...

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  • Thesis

  • Authors: Gorton, Christine E. (2006)

  • The concept of a primary ideal in commutative rings has been extended in several ways to noncommutative ring theory. Generically these are called generalized primary conditions. We investigate the interrelations between these generalizations as well as their relation to various structural properties of a ring. Particular attention is given to the additive group structure of the ring. Conditions are given for the intersection of generalized primary ideals to be generalized primary. Ascending chain conditions on ideals are useful in this context. Various set inclusion relations and permutation identities are used to establish conditions for one-sided primary conditions to be two-sided. ...

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  • Thesis

  • Authors: Alhaddad, Shemsi I. (2006)

  • The Iwahori-Hecke algebras of Coxeter groups play a central role in the study of representations of semisimple Lie-type groups. An important tool is the combinatorial approach to representations of Iwahori-Hecke algebras introduced by Kazhdan and Lusztig in 1979. In this dissertation, I discuss a generalization of the Iwahori-Hecke algebra of the symmetric group that is instead based on the complex reflection group G(r,1,n). Using the analogues of Kazhdan and Lusztig's R-polynomials, I show that this algebra determines a partial order on G(r,1,n) that generalizes the Chevalley-Bruhat order on the symmetric group. I also consider possible analogues of Kazhdan-Lusztig polynomials.

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  • Thesis

  • Authors: Paredez, Alexander R. (2006)

  • Plant cells are fixed in position for their entire life necessitating tight regulation of division and subsequent cell expansion in order to establish proper organ morphogenesis. Both of these processes are known to involve the cytoskeleton and the plant cell wall. The actin and tubulin cytoskeleton are important for establishing division planes and subsequently regulating cell expansion. Organ shape is the result of oriented cell divisions and coordinated cell expansion between all the cells within an organ. The goal of this thesis is to gain understanding about the connection between the cell wall and the cytoskeleton. To find components regulating the cortical microtubule (MT) c...

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  • Thesis

  • Authors: Swingley, Wesley Douglas (2006)

  • Since the advent of life on this planet, photosynthetic prokaryotes have evolved to fill a variety of ecological niches. Many organisms have made novel adaptations in light harvesting mechanisms, pigment compositions, and opportunistic metabolic pathways. We set out to study two such organisms, Acaryochloris marina and Roseobacter denitrificans. The marine cyanobacterium A. marina lives in an environment where much of the photosynthetically active light is absorbed by another cyanobacterial species. Consequently, A. marina utilizes the unique pigment chlorophyll (Chi) d to absorb light that is unused by Chl a and b in the competing species. In spite of the lower-energy light absorbed...

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  • Thesis

  • Authors: Kandil, Mahrous Mahmoud (2006)

  • Cyanuric acid is a key intermediate in the biodegradation pathway of atrazine which has been detected in ground and surface waters because of its widespread use around the world. Few strains are known for their ability to degrade and mineralize atrazine. Some of these strains harbor the atzD and trzD genes, which encode for cyanuric acid amidohydrolase, essential for cyanuric acid mineralization into carbon dioxide and ammonia. For more than 20 years, research has revealed that urea is one of the intermediates in cyanuric acid degradation. However, recent studies suggest that urea is not produced during the metabolism of atrazine or cyanuric acid. In this thesis, hundreds of isolates...

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  • Sách (eBooks)

  • Authors: Nguyen, Thi Hue; Bui, Thi Hong Hanh (2013)

  • This laboratory is designed to give student an introduction to major organisms used for studying genetics. We will explore the classical and modern technique in culturing fruit flies in vials, distinguish male and female fruit flies, and identify various stages in the life cycle of D. melanogaster. To understand how the genetic material passed between generations, how gene expression may be regulated, and how mutation can occur. The students will perform the practical on onion root tip samples and garlic chive flower samples, observe the steps of cell division. Practical provides to gene map study also carries out in this laboratory through the structure of the polytene chromosome.

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  • Thesis

  • Authors: Yoon, Sungroh (2005)

  • Today, more and more large-scale genomic data sets are being produced by various high-throughput technologies, and genomic data mining has never been more impor¬tant. Clustering is an unsupervised learning technique that has been popular in data analysis. Although there is mature statistical literature on clustering, new types of genomic data such as gene expression data have sparked development of multiple new methods. Specifically, the technique of biclustering refers to a method that performs simultaneous clustering of rows and columns in a data matrix identifying patterns that appear in the form of (possibly overlapping) submatrices. Although this method has some clear advantages ...

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  • Thesis

  • Authors: Hsieh, Michael (2006)

  • Victoria Harbour is located between Kowloon and Hong Kong Island in the southeastern prodelta region of the Pearl River system. Since the mid-1900s, the population in Hong Kong has grown rapidly, coastal areas surrounding Victoria Harbour have been reclaimed, and excess raw sewage has been disposed into the Harbour. Release of methane from harbour sediments during dredging activities instigated interest in studying the sources of methane trapped in Victoria Harbour sediments. Core MBH 54/2, from a heavily polluted area in Victoria Harbour's Kowloon Bay, was selected for this study. However, no methane was detected in sediments from this core. The project was redefined, using a detaile...

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  • Thesis

  • Authors: Durocher, Stephane (2006)

  • The traditional problems of facility location are defined statically; a set (or multiset) of n points is given as input, corresponding to the positions of clients, and a solution is returned consisting of set of k points, corresponding to the positions of facilities, that optimizes some objective function of the input set. In the k-centre problem, the objective is to select k points for locating facilities such that the maximum distance from any client to its nearest facility is mini¬mized. In the k-median problem, the objective is to select k points for locating facilities such that the average distance from each client to its nearest facility is minimized. A common setting for these...

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  • Thesis

  • Authors: Marino, Roger Joseph (2006)

  • This project investigated the use of geotextile filters to remove organic particles from combined sewer overflows. This addressed the need for a compact end-of-pipe treatment system that could be retrofitted at an existing outfall or regulation chamber. The premise was that nonwoven geotextiles with complex pore structures and interior porosity could serve cake, medium and depth filter functions to capture light, suspended and colloidal particles of varying size distributions. To provide a large filter surface contact area and avoid high head losses, the filters were arranged in a sinuous pattern in a containment vessel. The applicability of the manufacturer's material properties deve...

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  • Article

  • Authors: Goulbourne, Harry (2006-08)

  • Bài viết này đặt ra câu hỏi về những thế hệ nghiên cứu xã hội ở Anh trước đây (các nhà xã hội học, nhân học, khoa học chính trị …) đã làm thế nào để nghiên cứu các đặc tính văn hoá của các nhóm thiểu số sau chiến tranh khi mà họ đánh giá cao nhóm này nhưng lại coi nhẹ nhóm khác, và họ đã dùng cách đánh giá đó để đo lường tỉ lệ thành công hoặc thất bại của các nhóm thiểu số trong việc hoà nhập vào xã hội Anh lúc bấy giờ. Bằng phương pháp tổng quan và bình luận các nghiên cứu xã hội ở Anh về các yếu tố tác động trong hơn 4 thập kỷ, bài viết này nhận định rằng các nhà phân tích hiện nay cũng như trước kia phải đối mặt với những rủi ro trong công việc nghiên cứu, và họ cũng có thể nhầm lẫ...

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  • Thesis

  • Authors: Lê, Quang Trường.;  Advisor: Lê, Giang; Đoàn, Ánh Loan (2012)

  • Gia Định tam gia (Trịnh Hoài Đức, Ngô Nhân Tĩnh, Lê Quang Định) là những nhà thơ lớn ở buổi đầu của nền văn học Hán Nôm Gia Định Nam Bộ, nhưng cho đến trước khi luận án này thực hiện, chưa có công trình nghiên cứu chuyên sâu và công bố tư liệu đầy đủ. Luận án của chúng tôi đã bổ khuyết được tình trạng trên: nghiên cứu tìm hiểu thơ Gia Định tam gia ở phương diện nội dung, nghệ thuật trong bối cảnh văn học Hán Nôm Nam Bộ; đồng thời dịch thuật chú giải thơ và các tư liệu liên quan đến Tam gia.

  • thvnu400000251.pdf.jpg
  • Thesis

  • Authors: Ngô, Thị Nghĩa Bình.;  Advisor: Hà, Thiên Sơn; Nguyễn, Trọng Nghĩa (2015)

  • Ở Việt Nam, nông nghiệp, ND, nông thôn hay còn gọi là "tam nông" là vấn đề được Đảng Cộng sản Việt Nam rất quan tâm và coi trọng trong suốt quá trình lãnh đạo đất nước. Bởi lẽ, điểm xuất phát của Việt Nam đi lên CNXH là từ một nước nông nghiệp lạc hậu, ND luôn chiếm tỷ lệ lớn trong lực lượng lao động. GCND Việt Nam là giai cấp gắn bó đầu tiên và lâu đời với nền sản xuất và cội nguồn của dân tộc, là lực lượng có vai trò hết sức quan trọng trong sự nghiệp cách mạng của Đảng, của dân tộc Việt Nam. Lịch sử 85 năm dưới sự lãnh đạo của Đảng đã khẳng định những đóng góp to lớn của GCND đối với sự nghiệp đấu tranh giải phóng dân tộc, xây dựng và bảo vệ Tổ quốc. Bình Định là một tỉnh nông ...