Xem 1-20 trên 368 kết quả Study characteristics
  • The wide geographical distribution of the rice plant ( Oryza sativa L.) and its long history of cultivation in Asian countries have led to the development of a great diversity of varietal types. Similarly, workers in various rice-growing countries use different terms to designate identical morphological and physiological characters, agronomic traits, gene symbols, and cultural practices. Whereas varietal diversity in germ plasm is desired in rice breeding, variations in nomenclature hinder scientific communication among the workers.

    pdf40p lulanphuong 20-03-2012 74 27   Download

  • This book is published by Liberty Fund, Inc., a foundation established to encourage study of the ideal of a society of free and responsible individuals. The cuneiform inscription that serves as our logo and as the design motif for our endpapers is the earliest-known written appearance of the word ‘‘freedom’’ (amagi ),...

    pdf248p caixanh_222 13-04-2013 30 8   Download

  • This paper presents the results of soil characteristics study and orientation for rational and sustainable use of major soil types in Thai Thuy District, Thai Binh Province, where is facing many environmental problems. The interactive process between river, sea and human activities over time has resulted in the characteristics of 10 soil types, which are grouped in 4 main classes (acid sulfate soil, saline soil, alluvial soil and sandy soil). They have been used for agricultural production (mainly for rice and other crops growing).

    pdf5p dem_thanh 22-12-2012 34 7   Download

  • Over the past few decades numerous studies have shown an alarming increase in the concentration of atmospheric particular matter called aerosols resulting from a variety of human activities, ranging from agricultural to combustion of fossil fuels. Besides having serious impacts on the health of all living creatures, these particles can affect planetary radiation budget. Consequences of this change include global temperature shifts and the altering of atmospheric and oceanic circulation patterns.

    pdf0p greengrass304 18-09-2012 23 6   Download

  • We prove Maruyama’s conjecture on the boundedness of slope semistable sheaves on a projective variety defined over a noetherian ring. Our approach also gives a new proof of the boundedness for varieties defined over a characteristic zero field. This result implies that in mixed characteristic the moduli spaces of Gieseker semistable sheaves are projective schemes of finite type. The proof uses a new inequality bounding slopes of the restriction of a sheaf to a hypersurface in terms of its slope and the discriminant.

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  • Quang Ninh Province, situated in Northeast coast of Vietnam, has about 250km of shoreline, many estuaries, and tidal flats and over 2000 islands. The diversified nature, natural landscapes and ecosystems grant the province a great potential for tourism and specially seafood products. Peanut-worms (Sipunculus nudus) are exploited and used as popular seafood in international and domestic markets as special food of high nutritional and pharmaceutical value.

    pdf6p dem_thanh 22-12-2012 19 5   Download

  • We show that, on the level of derived categories, representations of the Lie algebra of a semisimple algebraic group over a field of finite characteristic with a given (generalized) regular central character are the same as coherent sheaves on the formal neighborhood of the corresponding (generalized) Springer fiber.

    pdf48p dontetvui 17-01-2013 17 5   Download

  • Radioactive sources which used to study were the standardized radioactive of common monoenergetic radionuclide Cs137 and standardized multigamma Co60, Ba133, Eu152. Determination of the absolute efficiency curve and energy resolution as a function of energy of GEM40P4 HPGe spectrometer are presented in this paper.

    pdf6p tuanlocmuido 19-12-2012 13 3   Download

  • Lithium fluoride (LiF) thermoluminescent powder doped with Mg, Cu, Na, and Si as activators was prepared. X-ray diffraction analysis indicated that doping LiF with different activators makes crystal lattice somewhat expand. The dosimetric properties of the powder were studied. The main dosimetric peak of LiF:Mg,Cu,Na,Si appeared in the range of 227−247o C and the ratio of the height of the main peak to that of the other small peaks in the LiF:Mg,Cu,Na,Si is much greater than that in the LiF:Mg,Ti and LiF:Mg,Cu,P. ...

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  • Data were extracted into separate databases for studies reporting on crops and livestock products (including meat, milk and eggs). Extracted data included all relevant information on study characteristics, methods and results. Data on factors outlined in the conceptual framework on nutrient variability (Figure 1) were also extracted when available. For the first 10 included articles, data extraction was performed in duplicate by two independent reviewers. Extracted data were compared and any inconsistencies noted and corrected as necessary.

    pdf36p ut_hai_can 29-12-2012 23 3   Download

  • Reusing domestic wastewater for irrigation is a common practice in peri-urban areas in Vietnam. This study investigates the characteristic of domestic wastewater in Hanoi City in terms of nutritive value and potential risk in using for agriculture. The wastewater samples were collected in four main drainage rivers of the City including Lu, Set, Kim Nguu, and To Lich River during March to May 2010. We found that the wastewater of Hanoi City

    pdf6p dem_thanh 22-12-2012 27 2   Download

  • As natural language understanding research advances towards deeper knowledge modeling, the tasks become more and more complex: we are interested in more nuanced word characteristics, more linguistic properties, deeper semantic and syntactic features. One such example, explored in this article, is the mention detection and recognition task in the Automatic Content Extraction project, with the goal of identifying named, nominal or pronominal references to real-world entities—mentions— and labeling them with three types of information: entity type, entity subtype and mention type. ...

    pdf8p hongvang_1 16-04-2013 19 2   Download

  • In this paper, we describe an empirical study of Chinese chunking on a corpus, which is extracted from UPENN Chinese Treebank-4 (CTB4). First, we compare the performance of the state-of-the-art machine learning models. Then we propose two approaches in order to improve the performance of Chinese chunking. 1) We propose an approach to resolve the special problems of Chinese chunking. This approach extends the chunk tags for every problem by a tag-extension function. 2) We propose two novel voting methods based on the characteristics of chunking task.

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  • Objective of the dissertation: Evaluation on epidemiologic and pathological characteristics and measures of disease prevention caused by Histomonas meleagridis in raising chickens in two provinces Thai Nguyen and Bac Giang, contribute to improving the chickens husbandry productivity in areas.

    pdf27p change01 05-05-2016 10 2   Download

  • Goal It is to provide scientific arguments about the biological characteristics, and reproductive and rearing techniques of Channa lucius. The success of the project will contribute greatly to the development process of Channa lucius hatchery to supply artificial fish for aquaculture systems and renewable fish resources in the wild in the Mekong Delta as well as in the whole country.

    pdf28p change05 08-06-2016 11 2   Download

  • Laser-induced thermal explosion of metallic nanoparticles originates from nonlinear optical effect. Nonlinear optical properties of nanoparticle materials depend strongly on their size and shape. Several methods were proposed to produce nanoparticles of a controlled size and welldefined distribution. We studied to prepare silver nanoparticles by laser ablation. The characteristic spectral feature of the silver nanoparticles (peak around 400nm) was found in the absorption spectra measured by a UV-Vis 2450 spectrometer. ...

    pdf5p tuanlocmuido 19-12-2012 14 1   Download

  • This paper presents in summary form some major points of Chapter 3 of Kurtzman, 1984.) Models of the human syntactic parsing mechanism can be classified according to the ways in which they operate upon ambiguous input. Each mode of operation carries particular requirements concerning such basic computational characteristics of the parser as i t s storage capacities and the scheduling of i t s processes, and so specifying which mode is actually embodied in human parsing is a useful approach to determining the functional organization of the human parser.

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  • In this study, the mixtures of ZnO and Ga2O3 powder with addition of LiCl flux were fired, the raw material mixing ratio, doped with Mn 2+ and firing atmosphere effects on phosphor characteristics were investigated. When fired at 1200°C, its phosphor powder emits a broad-band spectrum range between 375 nm to 700 nm, with a peak at 470 nm.

    pdf6p nguyenphong201 29-03-2016 7 1   Download

  • The purposes: Identify the morphological characteristics of day 3 and day 5 embryos cultured in vitro; assess the morphological correlations of day 3 and day 5 embryos and initially evaluated results of sequential embryo selection in culturing the day 3 and day 5 embryos.

    doc25p change01 05-05-2016 2 1   Download

  • To study the clinical and paraclinical characteristics of primary knee osteoarthritis. To assess the effectiveness and safety of autologous platelet-rich plasma therapy in treament of primary knee osteoarthritis.

    doc29p change01 05-05-2016 5 1   Download

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