Experimental exploration

Xem 1-20 trên 61 kết quả Experimental exploration
  • This strategic lab guide explores the current methodological variety of molecular biology and genomics in a simple manner, addressing the assets and drawbacks as well as critical points. It also provides short and precise summaries of routine procedures as well as listings of the advantages and disadvantages of alternative methods.This lab book illustrates ways out of experimental dead ends and teaches a feeling for doing the right experiment at the right time.

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  • The Committee on Gravitational Physics (CGP) was organized by the National Research Council’s (NRC’s) Board on Physics and Astronomy (BPA) as part of the decadal survey Physics in a New Era. The committee’s main charges were (1) to assess the achievements in gravitational physics over the last decade and (2) to identify the most promising opportunities for research in the next decade and describe the resources necessary to realize those opportunities. This report fulfills those charges....

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  • This paper focuses on the exploration of term dependence in the application of sentence retrieval. The adjacent terms appearing in query are assumed to be related with each other. These assumed dependences among query terms will be further validated for each sentence and sentences, which present strong syntactic relationship among query terms, are considered more relevant. Experimental results have fully demonstrated the promising of the proposed models in improving sentence retrieval effectiveness. ...

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  • It includses a n u m b e r of specialized tools t h a t consent an easy, graphics-based interaction with the parser. It is shown in particular how a combination of the characteristics of the parser (based on the lexicon a n d on dynamic unification) and of the e n v i r o n m e n t allow a nonspecialized user to explore heuristics t h a t m a y alter the basica control of the system. In this way, for instance, a p s y c h o l i n g...

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  • In this paper, we explore correlation of dependency relation paths to rank candidate answers in answer extraction. Using the correlation measure, we compare dependency relations of a candidate answer and mapped question phrases in sentence with the corresponding relations in question. Different from previous studies, we propose an approximate phrase mapping algorithm and incorporate the mapping score into the correlation measure. The correlations are further incorporated into a Maximum Entropy-based ranking model which estimates path weights from training.

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  • Analog Behavioral Modeling With The Verilog-A Language provides the IC designer with an introduction to the methodologies and uses of analog behavioral modeling with the Verilog-A language. In doing so, an overview of Verilog-A language constructs as well as applications using the language are presented. In addition, the book is accompanied by the Verilog-A Explorer IDE (Integrated Development Environment), a limited capability Verilog-A enhanced SPICE simulator for further learning and experimentation with the Verilog-A language.

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  • Numerous authors proposed chapters on their work, and those presented here are the fruit of those proposals. As editor of this book, it has been my pleasure to collaborate with these many, fine contributing scientists. This text brings forth a great amount of fresh information on the biogeography and ecology of poorly known taxa and landscapes, and explores biogeographic processes not previously studied. The assembled work is an anthology of issues in modern biogeography, with topics ranging across regional to global spatial scales, and ecological to evolutionary temporal scales.

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  • This book consists of a selection of original papers of the leading scientists in the fields of Space and Planetary Physics, Solar and Space Plasma Physics with important contributions to the theory, modeling and experimental techniques of the solar wind exploration.

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  • We utilize a longitudinal survey of registrants for the Graduate Management Admissions Test (GMAT) to estimate the economic returns to an MBA. The GMAT exam, an admissions requirement for most MBA programs, is similar to the SAT for undergraduates without the competition from the ACT. The survey, sponsored by the Graduate Management Admissions Council (GMAC), was administered in four waves, beginning in 1990 and ending in 1998. 14 In addition, survey responses were linked to GMAC’s registration and test data, which includes personal background information and GMAT scores.

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  • In many respects, the science of materials has only fully utilized two of its three fundamental tools —the variables of temperature and chemical composition. Pressure, the third fundamental variable altering materials, is in many ways the most remarkable, as it spans some 60 orders of magnitude in the universe.

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  • Abstract Resistance to conventional anticancer therapies in patients with advanced solid tumors has prompted the need of alternative cancer therapies. Moreover, the success of novel cancer therapies depends on their selectivity for cancer cells with limited toxicity to normal tissues. Several decades after Coley's work a variety of natural and genetically modified non-pathogenic bacterial species are being explored as potential antitumor agents, either to provide direct tumoricidal effects or to deliver tumoricidal molecules.

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  • Medical imaging has been transformed over the past 30 years by the advent of computerized tomography (CT), magnetic resonance imaging (MRI), and various advances in x-ray and ultrasonic techniques. An enabling force behind this progress has been the (so far) exponentially increasing power of computers, which has made it practical to explore fundamentally new approaches.

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  • Having thus explored the statistical relationships between the D-P and the Structural typologies it is concluded that: (a) The Structural Typology provides slightly greater discrimination between regions in terms of their socio-economic performance (as reflected in the five indicators incorporated in the A- D index) than the D-P typology. Although we cannot claim to have proved so conclusively, this seems to suggest that sectoral structure is a more influential determinant of regional performance than is degree of rurality or accessibility.

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  • These studies suggest there is a complex interrelationship between students’ attitudes towards interacting with other students, their personalities, their learning styles and the communication technologies provided by institutions. A critical implication for this study is that low levels of student interaction on asynchronous discussion forums may not necessarily indicate student disinterest in interacting with other students, but may instead reflect their preference for interacting synchronously through other means.

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  • Almost all technologies described so far are suitable for prototyping or for small series production only. It simply takes a lot of time and is therefore costly to manufacture a large number of microstructures by laser ablation or wire erosion and by milling or SLM. This is not so in the case of the etching techniques. Here, a large number of microstructure devices can be very easily generated. Another possibility to obtain a large number of microstructures is by embossing.

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  • Eight studies were found which addressed this question. These studies explored reflection in medical and health professions students, relating it to learning, professional identity development, and critical thinking. Sobral (2000) examined students’ reflection-in-learning as they began their clinical clerkship using a 10-item self-report questionnaire. The author compared 103 student participants in an elective experience with 91 non-randomized controls who did not par- ticipate. The mean reflection-in-learning score in the participant group was 47.16 (SD 7.

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  • Abstract: Industry standard for the control of switch mode power supply (SMPS) systems has been analog control. Now with the advent of high speed, lower cost digital signal processing (DSP) ICs, digital control there has been an increased interest in digital control of SMPS. The Power Electronics & Power Quality Laboratory of Texas A&M University is currently exploring several implementation aspects of digital control of power factor correction (PFC) stage of SMPS. Two low cost digital controllers: TMS320LF2407 and ST52x420 are evaluated for implementing PFC function.

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  • As currently taught, the introductory course in analytical chemistry emphasizes quantitative (and sometimes qualitative) methods of analysis coupled with a heavy dose of equilibrium chemistry. Analytical chemistry, however, is more than equilib- rium chemistry and a collection of analytical methods; it is an approach to solving chemical problems. Although discussing different methods is important, that dis- cussion should not come at the expense of other equally important topics.

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  • The Quantum Mechanics Solver 3 uniquely illustrates the application of quantum mechanical concepts to various fields of modern physics. It aims at encouraging the reader to apply quantum mechanics to research problems in fields such as molecular physics, condensed matter physics or laser physics. Advanced undergraduates and graduate students will find a rich and challenging source of material for further exploration. This book consists of a series of problems concerning present-day experimental or theoretical questions on quantum mechanics....

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  • Scientists may also have to complete engineering tasks, such as designing experimental apparatus or building prototypes. Conversely, in the process of developing technology engineers sometimes find themselves exploring new phenomena, thus becoming, for the moment, scientists.

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