Xem 1-20 trên 64 kết quả Subset selection
  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Review Article Antenna Subset Selection for Cyclic Prefix Assisted MIMO Wireless Communications over Frequency Selective Channels

    pdf14p dauphong16 20-02-2012 19 3   Download

  • Without doubt, improving the education system to support Māori students to achieve their full potential is a big and complex challenge. For most of us, it is too big to know where to start. During our scoping work for this report, we decided on some questions that we consider make this challenge more digestible.

    pdf24p tay_thi_le 19-02-2013 16 4   Download

  • We survey elementary-school parents in St. Paul and Roseville, Minnesota, to discover how children travel to school and underlying factors influencing parent's choice of their child's travel mode. From this information we develop a statistical model of travel mode choice. We find that children's commute mode and parental attitudes towards school selection differ by school type (magnet versus neighbor- hood), income, and race.

    pdf0p nhacnenzingme 23-03-2013 15 3   Download

  • The theoretical manner in which periodontal disease progresses has long been a subject of debate. It is currently agreed that destructive periodontal disease progresses by means of asynchronous bursts of activity (Haffajee and Socransky 1986). According to this theory, periodontal tissue support is lost during short, acute episodes followed by prolonged periods of quiescence (Reddy, Palcanis, and Geurs 1997).

    pdf33p pt_1669 27-03-2012 165 67   Download

  • Such pesticides are widely used agricultural inputs, and they are esters of the phosphoric acid and the derivates thereof, and they share in common as a pharmacological characteristic, the action of inhibiting enzymes having esteracic activities, and more specifically, the inhibition of the acetylcholinesterase. They are easily hydrolyze and they have a low capacity of remaining in the environment (Palacios and Moreno, 2004), (Chakraborty, 2009), (Ntow et al, 2009). Other pesticides under study are the organochlorated, which are persistent, lypophilic and very steady.

    pdf428p conquynho32 18-09-2012 33 9   Download

  • An extended range of new sensing applications and solutions have emerged in different fields such as rural and forest fire detection [1], monitoring of industrial manufacturing processes [2], transport/logistics [3], and for personal services in areas such as healthcare and Ambient Assisted Living (AAL) [4]. These new advanced applications based on a new generation of sensing and communication capabilities are a consequence of the continuous advances in sensor technologies and wireless communication protocols that allow for greater autonomy of sensor nodes.

    pdf201p can_thai 10-12-2012 31 9   Download

  • All cacac aspects of human and robotic elements within the research activities of HRI far as they provide insight into how to improve our understanding of the development effective tools, protocols, and systems to enhance the HRI. For example, significant research efforts are being devoted to the man-machine interface design which makes it easier for people to interact with the robot. Researchers are investigating how to improve the existing interface so that multiple users can interact with multiple risk program at the same time.

    pdf652p lulanphuong 24-03-2012 52 8   Download

  • Chlorophyll fluorescence represents an intrinsic signal emitted by plants that can be employed to monitor their physiological state including changes of the photosynthetic apparatus, developmental processes of leaves, state of health, stress events, stress tolerance, and also to detect diseases or nutrient deficiency of plants. In particular, the application of laser induced chlorophyll fluorescence spectroscopy has drawn much attention recently owing to the non-invasive and nondestructive nature of the technique (Svanberg, 1995; Lang & Lichtenthaler, 1991; Chappelle et al., 1984)....

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  • This paper focuses on developing an empirical strategy for measuring the effect of pollution on health. Specifically, I look at the effect of air pollution on children's hospitalization for asthma. Childhood asthma is of particular interest for two reasons: 1) asthma is the leading chronic condition affecting children; and 2) current pollution standards are based on adult health responses to pollution and children face a greater risk from pollution exposure due to the sensitivity of their developing biological systems. This study builds on earlier work in five ways.

    pdf64p can_thai 12-12-2012 48 7   Download

  • The importance of sustainable management of non-market forest goods and services has increased during the last few years. This is also reflected in a number of policy documents within the EU. The new EU Rural Development Regulation speaks about the “non-productive investments", as investments to enhance the public amenity value of forests. The stakeholder consultation process within the EU Forestry Strategy and the report of the strategy’s implementation identify the issue of creating markets for currently non-market forest goods and services as an emerging issue.

    pdf75p dangsuynghi 15-03-2013 26 6   Download

  • Our stylized model generates several empirical hypotheses about the insurance offer decision. Firms in industries where labor turnover rates are high do not tend to offer insurance. Premium rigidities will be most pronounced in such industries. Firms not offering insurance will tend to have lower health-cost variability and lower average expected health spending than firms offering insurance; for example, they have higher proportions of younger workers or are in industries where workers tend to be healthy.

    pdf21p quaivatxanh 29-11-2012 19 5   Download

  • While the aesthetic and creative process of interior design would best be done by professional interior designers, our goal is to cre- ate software capable of automatically generating furniture arrange- ments for complex indoor scenes that are optimized to respect im- portant ergonomic factors. This technique would be useful in multi- player online games and other graphics applications requiring fully automatic interior design with a high degree of realism.

    pdf8p connhobinh 10-12-2012 29 5   Download

  • The narrative behind Simplified Ecosystem Capital Accounts (SECA): Ecosystems can be described as capital which delivers a bundle of services to people, some of which are appropriated and incorporated into products, accumulated and/or consumed. Other services are public goods of common benefit to the economy and human wellbeing. Altogether, these ecosystem services depend on ecosystem capital regeneration which is in turn influenced by ecosystem services consumption.

    pdf191p bin_pham 06-02-2013 24 5   Download

  • Tham khảo tài liệu 'diary of a wimpy kid event kit', kinh doanh - tiếp thị, tổ chức sự kiện phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

    pdf17p giamdocamnhac 06-04-2013 34 5   Download

  • Reduced levels of clinical or radiological pneumonia in clin- ical trials of a nine-valent pneumococcal conjugate vaccine provide an estimate of the vaccine-preventable disease burden (valency indicates the number of serotypes against which the vaccine provides protection; conjugate refers to conjugation of polysaccharides to a protein backbone). In a study in The Gambia, 37 percent of radiological pneumonia was prevented, reflecting the amount of disease caused by S. pneumoniae, and mortality was reduced by 16 percent (Cutts and others 2005).

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  • A breakdown by diagnosis shows even greater inequities: for women only 21% of the assessed musculoskeletal disorders’ claims were approved compared to 38% for men. For mental illness, only 12% of the women’s claims were accepted against 35% for the men’s. Data from Quebec, Canada, show similar inequities for stress-related claims and those for musculoskeletal disorders (Lippel, 1999, 2003); however an examination of claims related to workplace violence showed an advantage for women (Lippel, 2001).

    pdf38p le_minh_nha 18-12-2012 17 4   Download

  • There are, actually, no formal Swedish regulations for organic contaminants in sludge. There is an informal agreement between the Swedish EPA, the Farmers Union and the Water and Wastewater Association which includes the recommendations in table 3.1-1. These agreements are based more on practical experience than on scientific data. Sweden also used to have a recommended limit value for toluene, but this has been omitted (WALLGREN 2001).

    pdf53p ut_hai_can 29-12-2012 31 4   Download

  • Initially, buying green power in competitive retail markets entailed switching electricity service from the incumbent utility to a green power supplier. However, with few exceptions, green power marketers have found it difficult to compete or to persuade customers to switch suppliers. As a remedy, a number of states now require default suppliers (which are often the incumbent distribution utilities) to offer green power options to their customers.

    pdf70p lenh_hoi_xung 21-02-2013 16 4   Download

  • For reference purposes, I’ll mention some of the common ways to document requirements and planning information. If nothing else, knowing the common lingo helps translate between the various methods used by different organizations. You’ll find some teams document the requirements informally: “Oh, requirements…just go talk to Fred.” Others have elaborate templates and review procedures that break these documents into insanely small (and possibly overlapping) pieces owned by different people. • Marketing requirements document (MRD).

    pdf38p tainhacmienphi 25-02-2013 14 4   Download

  • This paper addresses the innovation dynamics induced by environmental policy in the pulp and paper industry. There has been a fair amount on technical change in the pulp and paper industry in the recent past and there are still plenty of options for improve- ment. Innovation and diffusion of new technologies have occurred with respect to end- of-pipe abatement, on processes and the product (paper) itself. The main drivers for in- novation in the pulp and paper industry are competition and market demands, but envi- ronmental policies have also played a role.

    pdf72p loixinloi 08-05-2013 26 4   Download

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