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Sample records for powerful search engines

  1. Federated Search in the Wild The Combined Power of over a Hundred Search Engines

    E-print Network

    Theune, Mariët

    Federated Search in the Wild The Combined Power of over a Hundred Search Engines Dong Nguyen1}@cs.utwente.nl ABSTRACT Federated search has the potential of improving web search: the user becomes less dependent Keywords Federated search, distributed information retrieval, evalua- tion, dataset, test collection, web

  2. Power Search.

    ERIC Educational Resources Information Center

    Haskin, David

    1997-01-01

    Compares six leading Web search engines (AltaVista, Excite, HotBot, Infoseek, Lycos, and Northern Light), looking at the breadth of their coverage, accuracy, and ease of use, and finds a clear favorite of the six. Includes tips that can improve search results. (AEF)

  3. Searching for people on Web search engines

    E-print Network

    Jansen, James

    Searching for people on Web search engines Amanda Spink and Bernard J. Jansen School of Information search for information on other people, using personal names, via Web search engines. Explores the nature is a common but not a major part of Web searching with few people seeking information on celebrities via Web

  4. Custom Search Engines: Tools & Tips

    ERIC Educational Resources Information Center

    Notess, Greg R.

    2008-01-01

    Few have the resources to build a Google or Yahoo! from scratch. Yet anyone can build a search engine based on a subset of the large search engines' databases. Use Google Custom Search Engine or Yahoo! Search Builder or any of the other similar programs to create a vertical search engine targeting sites of interest to users. The basic steps to…

  5. Needle Federated Search Engine

    SciTech Connect

    2009-12-01

    The Idaho National Laboratory (INL) has combined a number of technologies, tools, and resources to accomplish a new means of federating search results. The resulting product is a search engine called Needle, an open-source-based tool that the INL uses internally for researching across a wide variety of information repositories. Needle has a flexible search interface that allows end users to point at any available data source. A user can select multiple sources such as commercial databases (Web of Science, Engineering Index), external resources (WorldCat, Google Scholar), and internal corporate resources (email, document management system, library collections) in a single interface with one search query. In the future, INL hopes to offer this open-source engine to the public. This session will outline the development processes for making Needle?s search interface and simplifying the federation of internal and external data sources.

  6. Needle Federated Search Engine

    Energy Science and Technology Software Center (ESTSC)

    2009-12-01

    The Idaho National Laboratory (INL) has combined a number of technologies, tools, and resources to accomplish a new means of federating search results. The resulting product is a search engine called Needle, an open-source-based tool that the INL uses internally for researching across a wide variety of information repositories. Needle has a flexible search interface that allows end users to point at any available data source. A user can select multiple sources such as commercialmore »databases (Web of Science, Engineering Index), external resources (WorldCat, Google Scholar), and internal corporate resources (email, document management system, library collections) in a single interface with one search query. In the future, INL hopes to offer this open-source engine to the public. This session will outline the development processes for making Needle?s search interface and simplifying the federation of internal and external data sources.« less

  7. Web Search Engines.

    ERIC Educational Resources Information Center

    Schwartz, Candy

    1998-01-01

    Looks briefly at the history of World Wide Web search engine development and considers the current state of affairs. Reflects on future directions in terms of personalization, summarization, query expansion, coverage, and metadata. (Author/AEF)

  8. With News Search Engines

    ERIC Educational Resources Information Center

    Gunn, Holly

    2005-01-01

    Although there are many news search engines on the Web, finding the news items one wants can be challenging. Choosing appropriate search terms is one of the biggest challenges. Unless one has seen the article that one is seeking, it is often difficult to select words that were used in the headline or text of the article. The limited archives of…

  9. Web Search Engines: Search Syntax and Features.

    ERIC Educational Resources Information Center

    Ojala, Marydee

    2002-01-01

    Presents a chart that explains the search syntax, features, and commands used by the 12 most widely used general Web search engines. Discusses Web standardization, expanded types of content searched, size of databases, and search engines that include both simple and advanced versions. (LRW)

  10. DATA SEARCH ENGINE INTRODUCTION

    E-print Network

    Meng, Weiyi

    are performed every day. The Web consists of the Surface Web and the Deep Web (Hidden Web or Invisible Web of a page allows the page to be fetched directly. In contrast, the Deep Web contains pages that cannotD DATA SEARCH ENGINE INTRODUCTION The World Wide Web was first developed by Tim Berners- Lee

  11. PHYSICAL REVIEW A 88, 032307 (2013) Power-law scaling for the adiabatic algorithm for search-engine ranking

    E-print Network

    Coppersmith, Susan N.

    2013-01-01

    proposed by Brin and Page [4], underlies the success of the Google search engine [5]. In this algorithm the principal eigenvector of the "Google matrix." Recently, a quantum algorithm for generating this eigenvector

  12. Assessing Bias in Search Engines.

    ERIC Educational Resources Information Center

    Mowshowitz, Abbe; Kawaguchi, Akira

    2002-01-01

    Addresses the measurement of bias in search engines on the Web, defining bias as the balance and representation of items in a collection retrieved from a database for a set of queries. Assesses bias by measuring the deviation from the ideal of the distribution produced by a particular search engine. (Author/LRW)

  13. A Search Engine Features Comparison.

    ERIC Educational Resources Information Center

    Vorndran, Gerald

    Until recently, the World Wide Web (WWW) public access search engines have not included many of the advanced commands, options, and features commonly available with the for-profit online database user interfaces, such as DIALOG. This study evaluates the features and characteristics common to both types of search interfaces, examines the Web search

  14. How a Search Engine Works.

    ERIC Educational Resources Information Center

    Liddy, Elizabeth

    2001-01-01

    Explains how a search engine, or information retrieval system, operates. Four modules are described: the document processor, including term stemming, term weight assignment, and creating an index; the query processor, including parsing and query term weighting; the search and match function; and ranking capability. (LRW)

  15. Next-Gen Search Engines

    ERIC Educational Resources Information Center

    Gupta, Amardeep

    2005-01-01

    Current search engines--even the constantly surprising Google--seem unable to leap the next big barrier in search: the trillions of bytes of dynamically generated data created by individual web sites around the world, or what some researchers call the "deep web." The challenge now is not information overload, but information overlook.…

  16. Conceptual Models for Search Engines

    NASA Astrophysics Data System (ADS)

    Hendry, D. G.; Efthimiadis, E. N.

    Search engines have entered popular culture. They touch people in diverse private and public settings and thus heighten the importance of such important social matters as information privacy and control, censorship, and equitable access. To fully benefit from search engines and to participate in debate about their merits, people necessarily appeal to their understandings for how they function. In this chapter we examine the conceptual understandings that people have of search engines by performing a content analysis on the sketches that 200 undergraduate and graduate students drew when asked to draw a sketch of how a search engine works. Analysis of the sketches reveals a diverse range of conceptual approaches, metaphors, representations, and misconceptions. On the whole, the conceptual models articulated by these students are simplistic. However, students with higher levels of academic achievement sketched more complete models. This research calls attention to the importance of improving students' technical knowledge of how search engines work so they can be better equipped to develop and advocate policies for how search engines should be embedded in, and restricted from, various private and public information settings.

  17. Solar powered Stirling engine

    SciTech Connect

    Meijer, R.J.

    1987-11-24

    In a solar dish module which comprises a dish which receives incident solar rays and reflects them to a focus at which is located the combination of a receiver and a heat engine organized and arranged so that the heat energy of the reflected solar rays collected at the receiver powers the engine, and wherein the receiver and heat engine are supported from the dish by a framework, the improvement is described which comprises journal means for journaling at least the engine on the framework to maintain certain predetermined spatial orientation for the engine in relation to the direction of gravity irrespective of spatial orientation of the dish.

  18. Staleness Among Web Search Engines.

    ERIC Educational Resources Information Center

    Koehler, Wallace

    1998-01-01

    Describes a study of four major Web search engines that tested for staleness, a condition when a significant number of the hits it returns point to Web pages or server-level domains (SLD) that are no longer viable. Results of tests of URLs with AltaVista, HotBot, InfoSeek, and Open Text are discussed. (Author/LRW)

  19. Web Search Engines: (More) Features and Commands.

    ERIC Educational Resources Information Center

    Hock, Randolph

    2000-01-01

    Provides a summary look at the features provided by nine major World Wide Web search engines. Examines size, Boolean operators, phrase searching capabilities, media searching, format options, and special features. (LRW)

  20. Engineering Optimisation by Cuckoo Search

    E-print Network

    Yang, Xin-She

    2010-01-01

    A new metaheuristic optimisation algorithm, called Cuckoo Search (CS), was developed recently by Yang and Deb (2009). This paper presents a more extensive comparison study using some standard test functions and newly designed stochastic test functions. We then apply the CS algorithm to solve engineering design optimisation problems, including the design of springs and welded beam structures. The optimal solutions obtained by CS are far better than the best solutions obtained by an efficient particle swarm optimiser. We will discuss the unique search features used in CS and the implications for further research.

  1. Stirling engine power control

    SciTech Connect

    Fraser, James P.

    1983-01-01

    A power control method and apparatus for a Stirling engine including a valved duct connected to the junction of the regenerator and the cooler and running to a bypass chamber connected between the heater and the cylinder. An oscillating zone of demarcation between the hot and cold portions of the working gas is established in the bypass chamber, and the engine pistons and cylinders can run cold.

  2. NASA Indexing Benchmarks: Evaluating Text Search Engines

    NASA Technical Reports Server (NTRS)

    Esler, Sandra L.; Nelson, Michael L.

    1997-01-01

    The current proliferation of on-line information resources underscores the requirement for the ability to index collections of information and search and retrieve them in a convenient manner. This study develops criteria for analytically comparing the index and search engines and presents results for a number of freely available search engines. A product of this research is a toolkit capable of automatically indexing, searching, and extracting performance statistics from each of the focused search engines. This toolkit is highly configurable and has the ability to run these benchmark tests against other engines as well. Results demonstrate that the tested search engines can be grouped into two levels. Level one engines are efficient on small to medium sized data collections, but show weaknesses when used for collections 100MB or larger. Level two search engines are recommended for data collections up to and beyond 100MB.

  3. Internet Search Engines - Fluctuations in Document Accessibility.

    ERIC Educational Resources Information Center

    Mettrop, Wouter; Nieuwenhuysen, Paul

    2001-01-01

    Reports an empirical investigation of the consistency of retrieval through Internet search engines. Evaluates 13 engines: AltaVista, EuroFerret, Excite, HotBot, InfoSeek, Lycos, MSN, NorthernLight, Snap, WebCrawler, and three national Dutch engines: Ilse, Search.nl and Vindex. The focus is on a characteristic related to size: the degree of…

  4. Web Search Engines: Features and Commands.

    ERIC Educational Resources Information Center

    Hock, Randolph

    1999-01-01

    Presents a chart comparing Web search engines. Discusses features covered in the chart: size; Boolean Operators and Parentheses; phrase searching; proximity; truncation; title, date and URL fields; links to a URL; language; media searching; name; case sensitivity; searches all common words; directory attached; gives count for answer; gives term…

  5. Index Terms --Smart grid; power engineering education; power engineering curriculum; power engineering re-

    E-print Network

    1 Index Terms -- Smart grid; power engineering education; power engineering curriculum; power the United States power system has led to an engineering initiative va- riously known as `smart grid the smart grid will be educated, how they should be trained, and to what levels of comprehension

  6. Image Searching on the Excite Web Search Engine.

    ERIC Educational Resources Information Center

    Goodrum, Abby; Spink, Amanda

    2001-01-01

    Examines visual information needs as expressed in users' Web image queries on the Excite search engine. Discusses metadata; content-based image retrieval; user interaction with images; terms per query; term frequency; and implications for the development of models for visual information retrieval and for the design of Web search engines.…

  7. User Reactions to Search Engines Logos: Investigating Brand Knowledge of web Search Engines

    E-print Network

    Jansen, James

    User Reactions to Search Engines Logos: Investigating Brand Knowledge of web Search Engines Bernard logos. Our research is motivated by a small number of search engines dominating a market in which there are little switching costs. The major research goal is to investigate the effect that brand logos have

  8. Searching for the Fundamentals of Tissue Engineering

    E-print Network

    Twente, Universiteit

    Searching for the Fundamentals of Tissue Engineering Ana Barradas 14th February 2013 14/02/2013 1 #12;Tissue Engineering... in words Tissue Engineering is an interdisciplinary field that applies, maintain or improve tissue function. Langer and Vacanti; Tissue Engineering; Science; 1993 2 #12;Tissue

  9. Space Power Engineering Problems

    NASA Astrophysics Data System (ADS)

    Senkevich, V. P.

    2002-01-01

    Development of space power engineering in the first half of XXI century shall be aimed at preventing the forthcoming energy crisis and ecological catastrophes. The problem can be solved through using solar energy being perpetual, endless, and ecologically safe. As of now, issues on the development and employment of solar power stations and its beaming to the ground stations in the SHF band are put on the agenda. The most pressing problem is to develop orbital solar reflectors to illuminate towns in the polar regions, agricultural regions, and areas of processing sea products. Space-based technologies can be used to deal with typhoons, green house effects, and "ozone holes". Recently, large, frameless film structures formed by centrifugal forces offer the promise of structures for orbital power plants, reflectors, and solar sails. A big success is achieved in the development of power generating solar array elements of amorphous silicon. These innovations would make the development of orbital solar power plants dozens of times cheaper. Such solar arrays shall be used in the nearest future on heavy communication satellites and the Earth remote sensing platforms for generation of 140-160 kW at a specific power beyond 300 W/kg. The cargo traffic needed to develop and maintain the orbital power plants and reflector systems could be equipped with solar sails as the future low thrust propulsion. In 2000, the mankind witnessed an unexpected beginning of energy crisis along with strong hydro- meteorological events (typhoons, floods) that shocked the USA, the Western Europe, England, Japan, and other countries. The total damage is estimated as 90 billions of dollars. The mankind is approaching a boundary beyond which its further existence would depend on how people would learn to control weather and use ecologically safe power sources. Space technology base on the research potential accumulated in the previous century could serve for the solution of this problem.

  10. Search Engine Technologies CS 5319, Spring 2007

    E-print Network

    Ward, Nigel

    fair projects. 4. Edith thinks that a search engine probably should give higher weight to termsSearch Engine Technologies CS 5319, Spring 2007 Nigel Ward Sample Project Ideas 1. I would like for children, primarily in terms of being easy to read, for example for doing background research for science

  11. Web Impact Factors and Search Engine Coverage.

    ERIC Educational Resources Information Center

    Thelwall, Mike

    2000-01-01

    A survey was conducted to test the coverage of search engines and to decide whether their partial coverage is an obstacle to using them to calculate Web impact factors. Results indicate that search engine coverage, even of large national domains, is extremely uneven and would be likely to cause misleading calculations. (Author/AEF)

  12. Distributed search engine architecture based on topic specific searches

    NASA Astrophysics Data System (ADS)

    Abudaqqa, Yousra; Patel, Ahmed

    2015-05-01

    Indisputably, search engines (SEs) abound. The monumental growth of users performing online searches on the Web is a contending issue in the contemporary world nowadays. For example, there are tens of billions of searches performed everyday, which typically offer the users many irrelevant results which are time consuming and costly to the user. Based on the afore-going problem it has become a herculean task for existing Web SEs to provide complete, relevant and up-to-date information response to users' search queries. To overcome this problem, we developed the Distributed Search Engine Architecture (DSEA), which is a new means of smart information query and retrieval of the World Wide Web (WWW). In DSEAs, multiple autonomous search engines, owned by different organizations or individuals, cooperate and act as a single search engine. This paper includes the work reported in this research focusing on development of DSEA, based on topic-specific specialised search engines. In DSEA, the results to specific queries could be provided by any of the participating search engines, for which the user is unaware of. The important design goal of using topic-specific search engines in the research is to build systems that can effectively be used by larger number of users simultaneously. Efficient and effective usage with good response is important, because it involves leveraging the vast amount of searched data from the World Wide Web, by categorising it into condensed focused topic -specific results that meet the user's queries. This design model and the development of the DSEA adopt a Service Directory (SD) to route queries towards topic-specific document hosting SEs. It displays the most acceptable performance which is consistent with the requirements of the users. The evaluation results of the model return a very high priority score which is associated with each frequency of a keyword.

  13. Modeling Search Engine Effectiveness for Federated Search Luo Si and Jamie Callan

    E-print Network

    Callan, Jamie

    Modeling Search Engine Effectiveness for Federated Search Luo Si and Jamie Callan School Federated search links multiple search engines into a single, virtual search system. Most prior research of federated search focused on selecting search engines that have the most relevant contents, but ignored

  14. Faculty Search Materials Science and Engineering

    E-print Network

    Zallen, Richard

    Faculty Search Materials Science and Engineering Virginia Polytechnic Institute and State University The Department of Materials Science and Engineering (MSE) at Virginia Tech seeks applications or equivalent in a relevant area of materials science and engineering is required. The successful candidate

  15. Using Advanced Search Operators on Web Search Engines.

    ERIC Educational Resources Information Center

    Jansen, Bernard J.

    Studies show that the majority of Web searchers enter extremely simple queries, so a reasonable system design approach would be to build search engines to compensate for this user characteristic. One hundred representative queries were selected from the transaction log of a major Web search service. These 100 queries were then modified using the…

  16. Abstract --This panel session paper outlines one of the re-search thrust areas in the Power System Engineering Research

    E-print Network

    Oren, Shmuel S.

    ) to investigate requirements for a systematic transformation of today's electric grid to enable high penetra charging and the deploy- ment of distributed and system level storage devices to mitigate the variability influenced by weather patterns has a profound impact on the planning and operation of the power grid

  17. Steam electric power generation: Technology and environmental impact. (Latest citations from Information Services in Mechanical Engineering database). Published Search

    SciTech Connect

    1995-02-01

    The bibliography contains citations concerning the technology and environmental impact of steam electric power generation. Plant operation, control, heating and cooling systems, pollution and noise control, and environmental protection are discussed. Economic analyses of plant operation, plant management, energy conservation measures, and modeling and computational techniques are presented. (Contains a minimum of 188 citations and includes a subject term index and title list.)

  18. Hydraulic turbines for electric power generation. (Latest citations from Information Services in Mechanical Engineering database). Published Search

    SciTech Connect

    Not Available

    1993-07-01

    The bibliography contains citations concerning the design and performance of water turbines for electric power generation. Among the topics discussed are fatigue testing and problems associated with water purity and corrosion, flow measurement criteria and methods, governing systems, and the efficiency of steam turbines. Francis and Kaplan turbines are prominently mentioned. (Contains a minimum of 90 citations and includes a subject term index and title list.)

  19. Adding a visualization feature to web search engines: it's time.

    PubMed

    Wong, Pak Chung

    2008-01-01

    It's widely recognized that all Web search engines today are almost identical in presentation layout and behavior. In fact, the same presentation approach has been applied to depicting search engine results pages (SERPs) since the first Web search engine launched in 1993. In this Visualization Viewpoints article, I propose to add a visualization feature to Web search engines and suggest that the new addition can improve search engines' performance and capabilities, which in turn lead to better Web search technology. PMID:19004680

  20. Search Engines for Tomorrow's Scholars

    ERIC Educational Resources Information Center

    Fagan, Jody Condit

    2011-01-01

    Today's scholars face an outstanding array of choices when choosing search tools: Google Scholar, discipline-specific abstracts and index databases, library discovery tools, and more recently, Microsoft's re-launch of their academic search tool, now dubbed Microsoft Academic Search. What are these tools' strengths for the emerging needs of…

  1. Deep-web search engine ranking algorithms

    E-print Network

    Wong, Brian Wai Fung

    2010-01-01

    The deep web refers to content that is hidden behind HTML forms. The deep web contains a large collection of data that are unreachable by link-based search engines. A study conducted at University of California, Berkeley ...

  2. Clinician Search Behaviors May Be Influenced by Search Engine Design

    PubMed Central

    Coiera, Enrico; Zrimec, Tatjana; Compton, Paul

    2010-01-01

    Background Searching the Web for documents using information retrieval systems plays an important part in clinicians’ practice of evidence-based medicine. While much research focuses on the design of methods to retrieve documents, there has been little examination of the way different search engine capabilities influence clinician search behaviors. Objectives Previous studies have shown that use of task-based search engines allows for faster searches with no loss of decision accuracy compared with resource-based engines. We hypothesized that changes in search behaviors may explain these differences. Methods In all, 75 clinicians (44 doctors and 31 clinical nurse consultants) were randomized to use either a resource-based or a task-based version of a clinical information retrieval system to answer questions about 8 clinical scenarios in a controlled setting in a university computer laboratory. Clinicians using the resource-based system could select 1 of 6 resources, such as PubMed; clinicians using the task-based system could select 1 of 6 clinical tasks, such as diagnosis. Clinicians in both systems could reformulate search queries. System logs unobtrusively capturing clinicians’ interactions with the systems were coded and analyzed for clinicians’ search actions and query reformulation strategies. Results The most frequent search action of clinicians using the resource-based system was to explore a new resource with the same query, that is, these clinicians exhibited a “breadth-first” search behaviour. Of 1398 search actions, clinicians using the resource-based system conducted 401 (28.7%, 95% confidence interval [CI] 26.37-31.11) in this way. In contrast, the majority of clinicians using the task-based system exhibited a “depth-first” search behavior in which they reformulated query keywords while keeping to the same task profiles. Of 585 search actions conducted by clinicians using the task-based system, 379 (64.8%, 95% CI 60.83-68.55) were conducted in this way. Conclusions This study provides evidence that different search engine designs are associated with different user search behaviors. PMID:20601351

  3. Automated Mechanism Design for Large Instances of Federated Search Engines

    E-print Network

    Gatti, Nicola

    Automated Mechanism Design for Large Instances of Federated Search Engines Francesco Trov in a search engine web page. In particular, Federated Search Engine auctions are challenging with respect setting named Federated Search Engines (FSE), since it is particularly challenging on the MD point of view

  4. (Nuclear power engineering in space)

    SciTech Connect

    Cooper, R.H. Jr.

    1990-06-18

    The principal purpose of this trip was to participate in the Anniversary Specialist Conference on Nuclear Power Engineering in Space hosted by the USSR Ministry of Atomic Power Engineering and Industry. The conference was held in Obninsk, USSR. A secondary purpose of the trip was to meet with the French Commissariat A L'Energie Atomique in Paris regarding the status of their space power program.

  5. A Powerful New Engine

    NASA Technical Reports Server (NTRS)

    2001-01-01

    Through Small Business Innovation Research (SBIR) funding from NASA's Glenn Research Center, Moller International created a new coating for rotary engines, which significantly improves the fuel consumption of a vehicle while reducing emissions. The new coatings are offered in the new Rotapower(R) engine, which is produced and distributed by Moller subsidiary, Freedom Motors, Inc. The coating allows the Rotapower engine to function smoother than other models, reducing wear and protecting the engine. The Rotapower engine has the ability to operate on a variety of fuels, including gasoline, natural gas, diesel, alcohol, and kerosene. A small and lightweight engine, it is projected to replace many of today's bulkier versions. The 10 horsepower model fits in the palm of one's hand, while the 160 horsepower model fits into a 5-gallon bucket. The clean running Rotapower engine is environmentally appealing, because it eliminates over 98 percent of the total emissions given off by traditional piston engines. Fewer pollutants are spewed into the air, making it especially attractive in areas where air pollution is a major problem. Due to the clean-burning nature of the engine, it meets the stringent standards set by the California Air Resources Board. The engine also has numerous commercial benefits in several types of recreational, industrial, and transportation applications, including personal watercraft, snowmobiles, portable generators. and pumps.

  6. Keynote Talk Search Engine Support for Software Applications

    E-print Network

    Callan, Jamie

    engine architectures, federated search of groups of search engines, adaptive information filtering, textKeynote Talk Search Engine Support for Software Applications Jamie Callan Language Technologies-answering, computer-assisted language learning, text mining, and other software applications that use a full-search

  7. Mining Test Oracles of Web Search Engines Wujie Zheng1

    E-print Network

    Xie, Tao

    }@cse.cuhk.edu.hk, haoma@microsoft.com, xie@csc.ncsu.edu Abstract--Web search engines have major impact in people oracles I. INTRODUCTION Web search engines are becoming more and more impor- tant for people to searchMining Test Oracles of Web Search Engines Wujie Zheng1 , Hao Ma2 , Michael R. Lyu1 , Tao Xie3

  8. The Use of Web Search Engines in Information Science Research.

    ERIC Educational Resources Information Center

    Bar-Ilan, Judit

    2004-01-01

    Reviews the literature on the use of Web search engines in information science research, including: ways users interact with Web search engines; social aspects of searching; structure and dynamic nature of the Web; link analysis; other bibliometric applications; characterizing information on the Web; search engine evaluation and improvement; and…

  9. Faculty of Engineering & Design BEng(Hons) Electrical Power Engineering

    E-print Network

    Burton, Geoffrey R.

    Faculty of Engineering & Design BEng(Hons) Electrical Power Engineering BEng(Hons) Electrical & Electronic Engineering Faculty of Engineering & Design #12;BEng(Hons) Electrical Power Engineering BEng+2 programme offers high-achieving students at North China Electric Power University (NCEPU) the opportunity

  10. Power Systems Engineering Research Center Empowering Minds to Engineer

    E-print Network

    information about this project, contact: Lizhi Wang Industrial and Manufacturing Systems EngineeringPower Systems Engineering Research Center Empowering Minds to Engineer the Future Electric Energy@iastate.edu Power Systems Engineering Research Center The Power Systems Engineering Research Center (PSERC

  11. Chemical Information in Scirus and BASE (Bielefeld Academic Search Engine)

    ERIC Educational Resources Information Center

    Bendig, Regina B.

    2009-01-01

    The author sought to determine to what extent the two search engines, Scirus and BASE (Bielefeld Academic Search Engines), would be useful to first-year university students as the first point of searching for chemical information. Five topics were searched and the first ten records of each search result were evaluated with regard to the type of…

  12. Evaluating a Federated Medical Search Engine

    PubMed Central

    Belden, J.; Williams, J.; Richardson, B.; Schuster, K.

    2014-01-01

    Summary Background Federated medical search engines are health information systems that provide a single access point to different types of information. Their efficiency as clinical decision support tools has been demonstrated through numerous evaluations. Despite their rigor, very few of these studies report holistic evaluations of medical search engines and even fewer base their evaluations on existing evaluation frameworks. Objectives To evaluate a federated medical search engine, MedSocket, for its potential net benefits in an established clinical setting. Methods This study applied the Human, Organization, and Technology (HOT-fit) evaluation framework in order to evaluate MedSocket. The hierarchical structure of the HOT-factors allowed for identification of a combination of efficiency metrics. Human fit was evaluated through user satisfaction and patterns of system use; technology fit was evaluated through the measurements of time-on-task and the accuracy of the found answers; and organization fit was evaluated from the perspective of system fit to the existing organizational structure. Results Evaluations produced mixed results and suggested several opportunities for system improvement. On average, participants were satisfied with MedSocket searches and confident in the accuracy of retrieved answers. However, MedSocket did not meet participants’ expectations in terms of download speed, access to information, and relevance of the search results. These mixed results made it necessary to conclude that in the case of MedSocket, technology fit had a significant influence on the human and organization fit. Hence, improving technological capabilities of the system is critical before its net benefits can become noticeable. Conclusions The HOT-fit evaluation framework was instrumental in tailoring the methodology for conducting a comprehensive evaluation of the search engine. Such multidimensional evaluation of the search engine resulted in recommendations for system improvement. PMID:25298813

  13. Intelligent Semantic Web Search Engines: A Brief Survey

    E-print Network

    Madhu, G; Rajinikanth, Dr T V

    2011-01-01

    The World Wide Web (WWW) allows the people to share the information (data) from the large database repositories globally. The amount of information grows billions of databases. We need to search the information will specialize tools known generically search engine. There are many of search engines available today, retrieving meaningful information is difficult. However to overcome this problem in search engines to retrieve meaningful information intelligently, semantic web technologies are playing a major role. In this paper we present survey on the search engine generations and the role of search engines in intelligent web and semantic search technologies.

  14. DMBC: SEO (Search Engine Optimization) Search Engine Optimization is the practice of increasing the visibility of a website within

    E-print Network

    Stowell, Michael

    & Keywords Site Popularity · How many people have previously searched for (and clicked on) your site vsDMBC: SEO (Search Engine Optimization) SEO · Search Engine Optimization is the practice of increasing the visibility of a website within search engines in a natural, non-promoted or advertised way

  15. Evidence-based Medicine Search: a customizable federated search engine

    PubMed Central

    Bracke, Paul J.; Howse, David K.; Keim, Samuel M.

    2008-01-01

    Purpose: This paper reports on the development of a tool by the Arizona Health Sciences Library (AHSL) for searching clinical evidence that can be customized for different user groups. Brief Description: The AHSL provides services to the University of Arizona's (UA's) health sciences programs and to the University Medical Center. Librarians at AHSL collaborated with UA College of Medicine faculty to create an innovative search engine, Evidence-based Medicine (EBM) Search, that provides users with a simple search interface to EBM resources and presents results organized according to an evidence pyramid. EBM Search was developed with a web-based configuration component that allows the tool to be customized for different specialties. Outcomes/Conclusion: Informal and anecdotal feedback from physicians indicates that EBM Search is a useful tool with potential in teaching evidence-based decision making. While formal evaluation is still being planned, a tool such as EBM Search, which can be configured for specific user populations, may help lower barriers to information resources in an academic health sciences center. PMID:18379665

  16. Surviving a Search Engine Overload Aaron Koehl

    E-print Network

    Wang, Haining

    2012, April 16­20, 2012, Lyon, France. ACM 978-1-4503-1229-5/12/04. Figure 1: Mean static vs dynamic and Mary Williamsburg, VA, USA amkoeh@cs.wm.edu Haining Wang Department of Computer Science College of William and Mary Williamsburg, VA, USA hnw@cs.wm.edu ABSTRACT Search engines are an essential component

  17. Research Trends with Cross Tabulation Search Engine

    ERIC Educational Resources Information Center

    Yin, Chengjiu; Hirokawa, Sachio; Yau, Jane Yin-Kim; Hashimoto, Kiyota; Tabata, Yoshiyuki; Nakatoh, Tetsuya

    2013-01-01

    To help researchers in building a knowledge foundation of their research fields which could be a time-consuming process, the authors have developed a Cross Tabulation Search Engine (CTSE). Its purpose is to assist researchers in 1) conducting research surveys, 2) efficiently and effectively retrieving information (such as important researchers,…

  18. Quality Dimensions of Internet Search Engines.

    ERIC Educational Resources Information Center

    Xie, M.; Wang, H.; Goh, T. N.

    1998-01-01

    Reviews commonly used search engines (AltaVista, Excite, infoseek, Lycos, HotBot, WebCrawler), focusing on existing comparative studies; considers quality dimensions from the customer's point of view based on a SERVQUAL framework; and groups these quality expectations in five dimensions: tangibles, reliability, responsiveness, assurance, and…

  19. Diversified Caching for Replicated Web Search Engines

    E-print Network

    Yiu, Man Lung

    Diversified Caching for Replicated Web Search Engines Chuanfei Xu, Bo Tang, Man Lung Yiu Department lists. Furthermore, the huge capacity of modern hard disks renders it feasible to replicate inverted be the cache content of Si. Given a query workload Q (i.e., a sequence of queries), we measure the query

  20. Power control for heat engines

    DOEpatents

    Dineen, John J. (Durham, NH)

    1984-01-01

    A power control arrangement for a Stirling engine includes a sleeve mounted in each cylinder for axial movement and a port in the sleeve leading to a dead space. The port is covered by the piston at a position that is determined by the piston position and the axial adjustment of the sleeve. The compression phase of the Stirling cycle for that piston begins when the port is covered, so the position of the sleeve is used to set the Stirling engine power level.

  1. Search Engine Technologies name ______________ CS 5319, Spring 2007

    E-print Network

    Ward, Nigel

    Search Engine Technologies name ______________ CS 5319, Spring 2007 Nigel Ward Search Engine Evaluation Assignment C A. Look in your search history for a query you did yesterday and record it here: B)? Would that information have been useful in predicting what results you wanted? F. Overall, which search

  2. Dynamic Adaptive Search Based Software Engineering Needs Fast Approximate Metrics

    E-print Network

    Murphy, Liam

    1 Dynamic Adaptive Search Based Software Engineering Needs Fast Approximate Metrics Mark Harman. University College Dublin, Ireland. Abstract--Search Based Software Engineering (SBSE) uses fitness functions to guide an automated search for solutions to challenging software engineering problems. The fitness

  3. Design and Implementation of a Geographic Search Engine Alexander Markowetz

    E-print Network

    Suel, Torsten

    taking up yoga, local yoga schools are often of much higher interest than those of the world's ten biggest yoga schools. We expect that geographic search engines, i.e., search engines that support, a user of a conventional search engine looking for a yoga school in or close to Brooklyn may end up

  4. GOOSE: A Goal-Oriented Search Engine With Commonsense

    E-print Network

    GOOSE: A Goal-Oriented Search Engine With Commonsense Hugo Liu, Henry Lieberman, Ted Selker MIT. In this paper, we present GOOSE (goal-oriented search engine), an adaptive search engine interface that uses of the common sense inference, in a substantial number of cases, GOOSE is more likely to satisfy the user

  5. Ontology driven image search engine

    NASA Astrophysics Data System (ADS)

    Bei, Yun; Dmitrieva, Julia; Belmamoune, Mounia; Verbeek, Fons J.

    2007-01-01

    Image collections are most often domain specific. We have developed a system for image retrieval of multimodal microscopy images. That is, the same object of study visualized with a range of microscope techniques and with a range of different resolutions. In microscopy, image content is depending on the preparation method of the object under study as well as the microscope technique. Both are taken into account in the submission phase as metadata whilst at the same time (domain specific) ontologies are employed as controlled vocabularies to annotate the image. From that point onward, image data are interrelated through the relationships derived from annotated concepts in the ontology. By using concepts and relationships of an ontology, complex queries can be built with true semantic content. Image metadata can be used as powerful criteria to query image data which are directly or indirectly related to original data. The results of image retrieval can be represented using a structural graph by exploiting relationships from ontology rather than a listed table. Applying this to retrieve images from the same subject at different levels of resolution opens a new field for the analysis of image content.

  6. I-SEARCH A Multimodal Search Engine based on Rich Unified Content Description (RUCoD)

    E-print Network

    Cortes, Corinna

    I-SEARCH ­ A Multimodal Search Engine based on Rich Unified Content Description (RUCoD) Thomas-SEARCH EU (FP7 ICT STREP) project whose objective is the de- velopment of a multimodal search engine. We and Retrieval--World Wide Web; H.3.5 [Online Information Services]: Web-based services Keywords Multimodality

  7. How are we searching the World Wide Web? A comparison of nine search engine transaction logs

    E-print Network

    Jansen, James

    major Web search engines are essential tools in the quest to locate online information for many people, 1997). There is a critical need to understand how people use Web search en- gines. AmichaiHow are we searching the World Wide Web? A comparison of nine search engine transaction logs

  8. Can an Ad-hoc ontology Beat a Medical Search Engine? The Chronious Search Engine case

    E-print Network

    Giacomelli, Piero; Rosso, Roberto

    2012-01-01

    Chronious is an Open, Ubiquitous and Adaptive Chronic Disease Management Platform for Chronic Obstructive Pulmonary Disease(COPD) Chronic Kidney Disease (CKD) and Renal Insufficiency. It consists of several modules: an ontology based literature search engine, a rule based decision support system, remote sensors interacting with lifestyle interfaces (PDA, monitor touch-screen) and a machine learning module. All these modules interact each other to allow the monitoring of two types of chronic diseases and to help clinician in taking decision for care purpose. This paper illustrates how the ontology search engine was created and fed and how some comparative test indicated that the ontology based approach give better results, on some estimation parameters, than the main reference web search engine.

  9. Progress in Documentation: The Evaluation of WWW Search Engines.

    ERIC Educational Resources Information Center

    Oppenheim, C.; Morris, A.; McKnight, C.; Lowley, S.

    2000-01-01

    Reviews the literature on Web search engines evaluation, with the aim of identifying some of the issues and problems in this rapidly changing field. Suggests that a standardized set of tools be developed for the evaluation of search engines so comparisons can be made between them more effectively and variations in performance of any given search

  10. Efficient Query Processing in Geographic Web Search Engines

    E-print Network

    Eckmiller, Rolf

    . For example, when searching for yoga classes, local yoga schools are of much higher interest than the web sites of the world's largest yoga schools. We expect that geographic search engines, i.e., search engine looking for a yoga school in or close to Brooklyn, New York, might have to try queries

  11. Web Feet Guide to Search Engines: Finding It on the Net.

    ERIC Educational Resources Information Center

    Web Feet, 2001

    2001-01-01

    This guide to search engines for the World Wide Web discusses selecting the right search engine; interpreting search results; major search engines; online tutorials and guides; search engines for kids; specialized search tools for various subjects; and other specialized engines and gateways. (LRW)

  12. 40 CFR 1054.140 - What is my engine's maximum engine power and displacement?

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...engine's maximum engine power and displacement? 1054.140 Section 1054.140...engine's maximum engine power and displacement? This section describes how to...engine's maximum engine power and displacement for the purposes of this...

  13. SEARCH ENGINE TUNING WITH GENETIC ALGORITHMS Jeffrey Kyle Elser

    E-print Network

    Dyer, Bill

    SEARCH ENGINE TUNING WITH GENETIC ALGORITHMS by Jeffrey Kyle Elser A project submitted in partial ........................................................................................................9 Genetic Algorithms Background....................................................................................................................14 Genetic Algorithm Configuration

  14. Search based software engineering for software product line engineering: a survey and directions for future work

    E-print Network

    Harman, Mark

    Search based software engineering for software product line engineering: a survey and directions on Search Based Software Engineering (SBSE) for Software Product Lines (SPLs). We have attempted techniques to problems in software product line engineering. Having surveyed the recent explo- sion in SBSE

  15. A Solr Powered Architecture for Scientific Metadata Search Applications

    NASA Astrophysics Data System (ADS)

    Reed, S. A.; Billingsley, B. W.; Harper, D.; Kovarik, J.; Brandt, M.

    2014-12-01

    Discovering and obtaining resources for scientific research is increasingly difficult but Open Source tools have been implemented to provide inexpensive solutions for scientific metadata search applications. Common practices used in modern web applications can improve the quality of scientific data as well as increase availability to a wider audience while reducing costs of maintenance. Motivated to improve discovery and access of scientific metadata hosted at NSIDC and the need to aggregate many areas of arctic research, the National Snow and Ice Data Center (NSIDC) and Advanced Cooperative Arctic Data and Information Service (ACADIS) contributed to a shared codebase used by the NSIDC Search and Arctic Data Explorer (ADE) portals. We implemented the NSIDC Search and ADE to improve search and discovery of scientific metadata in many areas of cryospheric research. All parts of the applications are available free and open for reuse in other applications and portals. We have applied common techniques that are widely used by search applications around the web and with the goal of providing quick and easy access to scientific metadata. We adopted keyword search auto-suggest which provides a dynamic list of terms and phrases that closely match characters as the user types. Facet queries are another technique we have implemented to filter results based on aspects of the data like the instrument used or temporal duration of the data set. Service APIs provide a layer between the interface and the database and are shared between the NSIDC Search and ACADIS ADE interfaces. We also implemented a shared data store between both portals using Apache Solr (an Open Source search engine platform that stores and indexes XML documents) and leverage many powerful features including geospatial search and faceting. This presentation will discuss the application architecture as well as tools and techniques used to enhance search and discovery of scientific metadata.

  16. Transporting submarine engines to power the PRT

    NASA Technical Reports Server (NTRS)

    1926-01-01

    The city of Hampton was unable to supply adequate electric power to operate the PRT. Navy Captain Walter S. Diehl, Bureau of Aeronautics, acquired two 1000 hp submarine engines which were to be disposed of. BuAer 'loaned' the engines to the NACA, one of which is shown here. Next to the engine is Donald H. Wood, a mechanical engineer from Rensselaer Polytechnic Institute and Fred Weick's assistant. Propeller Research Tunnel (PRT) engineer Donald H. Wood ponders the unlikely transfer of a submarine engine from rail car to NACA truck, May 1926. Two such diesel engines powered the PRT.

  17. OntoSearch: An Ontology Search Engine1 Yi Zhang, Wamberto Vasconcelos, Derek Sleeman

    E-print Network

    Sleeman, Derek

    OntoSearch: An Ontology Search Engine1 Yi Zhang, Wamberto Vasconcelos, Derek Sleeman Department in both these areas. This paper discusses our work on OntoSearch, a kind of "ontology Google", which can help users find ontologies on the Internet. OntoSearch combines Google Web APIs with a hierarchy

  18. How To Do Field Searching in Web Search Engines: A Field Trip.

    ERIC Educational Resources Information Center

    Hock, Ran

    1998-01-01

    Describes the field search capabilities of selected Web search engines (AltaVista, HotBot, Infoseek, Lycos, Yahoo!) and includes a chart outlining what fields (date, title, URL, images, audio, video, links, page depth) are searchable, where to go on the page to search them, the syntax required (if any), and how field search queries are entered.…

  19. Searching for a New Way to Reach Patrons: A Search Engine Optimization Pilot Project at Binghamton University Libraries

    ERIC Educational Resources Information Center

    Rushton, Erin E.; Kelehan, Martha Daisy; Strong, Marcy A.

    2008-01-01

    Search engine use is one of the most popular online activities. According to a recent OCLC report, nearly all students start their electronic research using a search engine instead of the library Web site. Instead of viewing search engines as competition, however, librarians at Binghamton University Libraries decided to employ search engine

  20. Power and Energy Engineering Workforce Collaborative

    E-print Network

    challenges 3.Make the world a better place to live · Energy and Power Engineering is... ­ Exciting ­ Critical ­ Registrations: 325 students from about 80 institutions, 100 employers (engineering services, manufacturing

  1. 40 CFR 1042.140 - Maximum engine power, displacement, power density, and maximum in-use engine speed.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...Maximum engine power, displacement, power density, and maximum in-use engine speed...Maximum engine power, displacement, power density, and maximum in-use engine speed...engine power, displacement, and power density of an engine for the purposes of...

  2. 40 CFR 1042.140 - Maximum engine power, displacement, power density, and maximum in-use engine speed.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...Maximum engine power, displacement, power density, and maximum in-use engine speed...Maximum engine power, displacement, power density, and maximum in-use engine speed...engine power, displacement, and power density of an engine for the purposes of...

  3. 40 CFR 1042.140 - Maximum engine power, displacement, power density, and maximum in-use engine speed.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...Maximum engine power, displacement, power density, and maximum in-use engine speed...Maximum engine power, displacement, power density, and maximum in-use engine speed...engine power, displacement, and power density of an engine for the purposes of...

  4. 40 CFR 1042.140 - Maximum engine power, displacement, power density, and maximum in-use engine speed.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...Maximum engine power, displacement, power density, and maximum in-use engine speed...Maximum engine power, displacement, power density, and maximum in-use engine speed...engine power, displacement, and power density of an engine for the purposes of...

  5. Brief Report: Consistency of Search Engine Rankings for Autism Websites

    ERIC Educational Resources Information Center

    Reichow, Brian; Naples, Adam; Steinhoff, Timothy; Halpern, Jason; Volkmar, Fred R.

    2012-01-01

    The World Wide Web is one of the most common methods used by parents to find information on autism spectrum disorders and most consumers find information through search engines such as Google or Bing. However, little is known about how the search engines operate or the consistency of the results that are returned over time. This study presents the…

  6. Methods for Measuring Search Engine Performance over Time.

    ERIC Educational Resources Information Center

    Bar-Ilan, Judit

    2002-01-01

    Introduces methods for evaluating Web search engine performance over a time period. Describes the necessary setup for such studies, illustrates the use of these measures through a specific example, and recommends the use of the measures as a guideline for testing and improving search engine functionality. (Author/LRW)

  7. Securityenhanced Search Engine Design in Internet of Things Xiaojun Qian

    E-print Network

    Security­enhanced Search Engine Design in Internet of Things Xiaojun Qian (Nanjing Normal --- a security­enhanced search engine for Internet of Things based on El­ liptic Curve Cryptography (ECC) security protocol. We also report our preliminary experimental results. Key Words: Internet of Things

  8. Integrated engine generator for aircraft secondary power

    NASA Technical Reports Server (NTRS)

    Secunde, R. R.

    1972-01-01

    An integrated engine-generator for aircraft secondary power generation is described. The concept consists of an electric generator located inside a turbojet or turbofan engine and both concentric with and driven by one of the main engine shafts. The electric power conversion equipment and generator controls are located in the aircraft. When properly rated, the generator serves as an engine starter as well as a source of electric power. This configuration reduces or eliminates the need for an external gear box on the engine and permits reduction in the nacelle diameter.

  9. IntegromeDB: an integrated system and biological search engine

    PubMed Central

    2012-01-01

    Background With the growth of biological data in volume and heterogeneity, web search engines become key tools for researchers. However, general-purpose search engines are not specialized for the search of biological data. Description Here, we present an approach at developing a biological web search engine based on the Semantic Web technologies and demonstrate its implementation for retrieving gene- and protein-centered knowledge. The engine is available at http://www.integromedb.org. Conclusions The IntegromeDB search engine allows scanning data on gene regulation, gene expression, protein-protein interactions, pathways, metagenomics, mutations, diseases, and other gene- and protein-related data that are automatically retrieved from publicly available databases and web pages using biological ontologies. To perfect the resource design and usability, we welcome and encourage community feedback. PMID:22260095

  10. A Fuzzy-Match Search Engine for Physician Directories

    PubMed Central

    Ye, Zhan; Murali, Narayana

    2014-01-01

    Background A search engine to find physicians’ information is a basic but crucial function of a health care provider’s website. Inefficient search engines, which return no results or incorrect results, can lead to patient frustration and potential customer loss. A search engine that can handle misspellings and spelling variations of names is needed, as the United States (US) has culturally, racially, and ethnically diverse names. Objective The Marshfield Clinic website provides a search engine for users to search for physicians’ names. The current search engine provides an auto-completion function, but it requires an exact match. We observed that 26% of all searches yielded no results. The goal was to design a fuzzy-match algorithm to aid users in finding physicians easier and faster. Methods Instead of an exact match search, we used a fuzzy algorithm to find similar matches for searched terms. In the algorithm, we solved three types of search engine failures: “Typographic”, “Phonetic spelling variation”, and “Nickname”. To solve these mismatches, we used a customized Levenshtein distance calculation that incorporated Soundex coding and a lookup table of nicknames derived from US census data. Results Using the “Challenge Data Set of Marshfield Physician Names,” we evaluated the accuracy of fuzzy-match engine–top ten (90%) and compared it with exact match (0%), Soundex (24%), Levenshtein distance (59%), and fuzzy-match engine–top one (71%). Conclusions We designed, created a reference implementation, and evaluated a fuzzy-match search engine for physician directories. The open-source code is available at the codeplex website and a reference implementation is available for demonstration at the datamarsh website. PMID:25601050

  11. Persuading Consumers to Form Precise Search Engine Queries

    PubMed Central

    Leroy, Gondy

    2009-01-01

    Today’s search engines provide a single textbox for searching. This input method has not changed in decades and, as a result, consumer search behaviour has not changed either: few and imprecise keywords are used. Especially with health information, where incorrect information may lead to unwise decisions, it would be beneficial if consumers could search more precisely. We evaluated a new user interface that supports more precise searching by using query diagrams. In a controlled user study, using paper-based prototypes, we compared searching with a Google interface with drawing new or modifying template diagrams. We evaluated consumer willingness and ability to use diagrams and the impact on query formulation. Users had no trouble understanding the new search method. Moreover, they used more keywords and relationships between keywords with search diagrams. In comparison to drawing their own diagrams, modifying existing templates led to more searches being conducted and higher creativity in searching. PMID:20351879

  12. Grooker, KartOO, Addict-o-Matic and More: Really Different Search Engines

    ERIC Educational Resources Information Center

    Descy, Don E.

    2009-01-01

    There are hundreds of unique search engines in the United States and thousands of unique search engines around the world. If people get into search engines designed just to search particular web sites, the number is in the hundreds of thousands. This article looks at: (1) clustering search engines, such as KartOO (www.kartoo.com) and Grokker…

  13. Faculty Search Advanced Manufacturing of Materials Materials Science and Engineering

    E-print Network

    Faculty Search ­ Advanced Manufacturing of Materials Materials Science and Engineering Virginia Polytechnic Institute and State University The Department of Materials Science and Engineering at Virginia, and service; and a doctoral degree or equivalent in a relevant area of materials science and engineering

  14. The Infocious Web Search Engine: Improving Web Searching through Linguistic Analysis

    E-print Network

    Cho, Junghoo "John"

    , consider the query jaguar that a user might issue to a search engine. Typically, the major search engines may return results that deal with at least three disjoint topics: (1) Jaguar - the car brand name, (2) Jaguar - one version of MacOS X, (3) jaguar - the animal. As one can imagine, it is highly unlikely

  15. New Architectures for Presenting Search Results Based on Web Search Engines Users Experience

    ERIC Educational Resources Information Center

    Martinez, F. J.; Pastor, J. A.; Rodriguez, J. V.; Lopez, Rosana; Rodriguez, J. V., Jr.

    2011-01-01

    Introduction: The Internet is a dynamic environment which is continuously being updated. Search engines have been, currently are and in all probability will continue to be the most popular systems in this information cosmos. Method: In this work, special attention has been paid to the series of changes made to search engines up to this point,…

  16. Contingency power concepts for helicopter turboshaft engine

    NASA Technical Reports Server (NTRS)

    Hirschkron, R.; Davis, R. H.; Goldstein, D. N.; Haynes, J. F.; Gauntner, J. W.

    1984-01-01

    Twin helicopter engines are often sized by power requirement of safe mission completion after the failure of one of the two engines. This study was undertaken for NASA Lewis by General Electric Co. to evaluate the merits of special design features to provide a 2-1/2 minute Contingency Power rating, permitting an engine size reduction. The merits of water injection, cooling flow modulation, throttle push and an auxiliary power plant were evaluated using military life cycle cost (LCC) and commercial helicopter direct operating cost (DOC) merit factors in a rubber engine/rubber aircraft scenario.

  17. Wind turbines and generators for wind power plants. (Latest citations from the INSPEC: Information Services for the Physics and Engineering Communities database). Published Search

    SciTech Connect

    Not Available

    1993-09-01

    The bibliography contains citations concerning the design, development, testing, controlling, and performance characteristics of a variety of wind turbines and generators used in conjunction with wind power plants. Some consideration is given to economic issues, hybrid systems, and power grid integration studies. (Contains 250 citations and includes a subject term index and title list.)

  18. Search Engines for Civil and Environmental Engineers: American Society of Civil Engineers http://www.asce.org

    E-print Network

    Mountziaris, T. J.

    Search Engines for Civil and Environmental Engineers: American Society of Civil Engineers http://www.buildingsmag.com/ BIX/AEC http://www.building.org/ Civil Engineering Jobs http://www.civilengineeringjobs.com Civil://www.ite.org/ Jobs for Civil Engineers http://www.engcen.com/civjobs.htm Rocky Mountain Institute http

  19. Social media networking: YouTube and search engine optimization.

    PubMed

    Jackson, Rem; Schneider, Andrew; Baum, Neil

    2011-01-01

    This is the third part of a three-part article on social media networking. This installment will focus on YouTube and search engine optimization. This article will explore the application of YouTube to the medical practice and how YouTube can help a practice retain its existing patients and attract new patients to the practice. The article will also describe the importance of search engine optimization and how to make your content appear on the first page of the search engines such as Google, Yahoo, and YouTube. PMID:21506470

  20. LAILAPS: the plant science search engine.

    PubMed

    Esch, Maria; Chen, Jinbo; Colmsee, Christian; Klapperstück, Matthias; Grafahrend-Belau, Eva; Scholz, Uwe; Lange, Matthias

    2015-01-01

    With the number of sequenced plant genomes growing, the number of predicted genes and functional annotations is also increasing. The association between genes and phenotypic traits is currently of great interest. Unfortunately, the information available today is widely scattered over a number of different databases. Information retrieval (IR) has become an all-encompassing bioinformatics methodology for extracting knowledge from complex, heterogeneous and distributed databases, and therefore can be a useful tool for obtaining a comprehensive view of plant genomics, from genes to traits. Here we describe LAILAPS (http://lailaps.ipk-gatersleben.de), an IR system designed to link plant genomic data in the context of phenotypic attributes for a detailed forward genetic research. LAILAPS comprises around 65 million indexed documents, encompassing >13 major life science databases with around 80 million links to plant genomic resources. The LAILAPS search engine allows fuzzy querying for candidate genes linked to specific traits over a loosely integrated system of indexed and interlinked genome databases. Query assistance and an evidence-based annotation system enable time-efficient and comprehensive information retrieval. An artificial neural network incorporating user feedback and behavior tracking allows relevance sorting of results. We fully describe LAILAPS's functionality and capabilities by comparing this system's performance with other widely used systems and by reporting both a validation in maize and a knowledge discovery use-case focusing on candidate genes in barley. PMID:25480116

  1. LAILAPS: The Plant Science Search Engine

    PubMed Central

    Esch, Maria; Chen, Jinbo; Colmsee, Christian; Klapperstück, Matthias; Grafahrend-Belau, Eva; Scholz, Uwe; Lange, Matthias

    2015-01-01

    With the number of sequenced plant genomes growing, the number of predicted genes and functional annotations is also increasing. The association between genes and phenotypic traits is currently of great interest. Unfortunately, the information available today is widely scattered over a number of different databases. Information retrieval (IR) has become an all-encompassing bioinformatics methodology for extracting knowledge from complex, heterogeneous and distributed databases, and therefore can be a useful tool for obtaining a comprehensive view of plant genomics, from genes to traits. Here we describe LAILAPS (http://lailaps.ipk-gatersleben.de), an IR system designed to link plant genomic data in the context of phenotypic attributes for a detailed forward genetic research. LAILAPS comprises around 65 million indexed documents, encompassing >13 major life science databases with around 80 million links to plant genomic resources. The LAILAPS search engine allows fuzzy querying for candidate genes linked to specific traits over a loosely integrated system of indexed and interlinked genome databases. Query assistance and an evidence-based annotation system enable time-efficient and comprehensive information retrieval. An artificial neural network incorporating user feedback and behavior tracking allows relevance sorting of results. We fully describe LAILAPS’s functionality and capabilities by comparing this system’s performance with other widely used systems and by reporting both a validation in maize and a knowledge discovery use-case focusing on candidate genes in barley. PMID:25480116

  2. Search Engines for Tomorrow's Scholars, Part Two

    ERIC Educational Resources Information Center

    Fagan, Jody Condit

    2012-01-01

    This two-part article considers how well some of today's search tools support scholars' work. The first part of the article reviewed Google Scholar and Microsoft Academic Search using a modified version of Carole L. Palmer, Lauren C. Teffeau, and Carrier M. Pirmann's framework (2009). Microsoft Academic Search is a strong contender when…

  3. Real-time earthquake monitoring using a search engine method.

    PubMed

    Zhang, Jie; Zhang, Haijiang; Chen, Enhong; Zheng, Yi; Kuang, Wenhuan; Zhang, Xiong

    2014-01-01

    When an earthquake occurs, seismologists want to use recorded seismograms to infer its location, magnitude and source-focal mechanism as quickly as possible. If such information could be determined immediately, timely evacuations and emergency actions could be undertaken to mitigate earthquake damage. Current advanced methods can report the initial location and magnitude of an earthquake within a few seconds, but estimating the source-focal mechanism may require minutes to hours. Here we present an earthquake search engine, similar to a web search engine, that we developed by applying a computer fast search method to a large seismogram database to find waveforms that best fit the input data. Our method is several thousand times faster than an exact search. For an Mw 5.9 earthquake on 8 March 2012 in Xinjiang, China, the search engine can infer the earthquake's parameters in <1 s after receiving the long-period surface wave data. PMID:25472861

  4. Real-time earthquake monitoring using a search engine method

    PubMed Central

    Zhang, Jie; Zhang, Haijiang; Chen, Enhong; Zheng, Yi; Kuang, Wenhuan; Zhang, Xiong

    2014-01-01

    When an earthquake occurs, seismologists want to use recorded seismograms to infer its location, magnitude and source-focal mechanism as quickly as possible. If such information could be determined immediately, timely evacuations and emergency actions could be undertaken to mitigate earthquake damage. Current advanced methods can report the initial location and magnitude of an earthquake within a few seconds, but estimating the source-focal mechanism may require minutes to hours. Here we present an earthquake search engine, similar to a web search engine, that we developed by applying a computer fast search method to a large seismogram database to find waveforms that best fit the input data. Our method is several thousand times faster than an exact search. For an Mw 5.9 earthquake on 8 March 2012 in Xinjiang, China, the search engine can infer the earthquake’s parameters in <1?s after receiving the long-period surface wave data. PMID:25472861

  5. Search Engine-Crawler Symbiosis: Adapting to Community Interests

    E-print Network

    Bradshaw, Shannon

    Search Engine-Crawler Symbiosis: Adapting to Community Interests Gautam Pant, Shannon Bradshaw the crawler to better its performance. We show that the symbiosis can help the system learn about a community

  6. Stirling engines. (Latest citations from the Aerospace database). Published Search

    SciTech Connect

    Not Available

    1993-09-01

    The bibliography contains citations concerning fuel consumption, engine design and testing, computerized simulation, and lubrication systems relative to the Stirling cycle engine. Solar energy conversion research, thermodynamic efficiency, economics, and utilization for power generation and automobile engines are included. Materials used in Stirling engines are briefly evaluated. (Contains 250 citations and includes a subject term index and title list.)

  7. The search engine manipulation effect (SEME) and its possible impact on the outcomes of elections

    PubMed Central

    Epstein, Robert; Robertson, Ronald E.

    2015-01-01

    Internet search rankings have a significant impact on consumer choices, mainly because users trust and choose higher-ranked results more than lower-ranked results. Given the apparent power of search rankings, we asked whether they could be manipulated to alter the preferences of undecided voters in democratic elections. Here we report the results of five relevant double-blind, randomized controlled experiments, using a total of 4,556 undecided voters representing diverse demographic characteristics of the voting populations of the United States and India. The fifth experiment is especially notable in that it was conducted with eligible voters throughout India in the midst of India’s 2014 Lok Sabha elections just before the final votes were cast. The results of these experiments demonstrate that (i) biased search rankings can shift the voting preferences of undecided voters by 20% or more, (ii) the shift can be much higher in some demographic groups, and (iii) search ranking bias can be masked so that people show no awareness of the manipulation. We call this type of influence, which might be applicable to a variety of attitudes and beliefs, the search engine manipulation effect. Given that many elections are won by small margins, our results suggest that a search engine company has the power to influence the results of a substantial number of elections with impunity. The impact of such manipulations would be especially large in countries dominated by a single search engine company. PMID:26243876

  8. The search engine manipulation effect (SEME) and its possible impact on the outcomes of elections.

    PubMed

    Epstein, Robert; Robertson, Ronald E

    2015-08-18

    Internet search rankings have a significant impact on consumer choices, mainly because users trust and choose higher-ranked results more than lower-ranked results. Given the apparent power of search rankings, we asked whether they could be manipulated to alter the preferences of undecided voters in democratic elections. Here we report the results of five relevant double-blind, randomized controlled experiments, using a total of 4,556 undecided voters representing diverse demographic characteristics of the voting populations of the United States and India. The fifth experiment is especially notable in that it was conducted with eligible voters throughout India in the midst of India's 2014 Lok Sabha elections just before the final votes were cast. The results of these experiments demonstrate that (i) biased search rankings can shift the voting preferences of undecided voters by 20% or more, (ii) the shift can be much higher in some demographic groups, and (iii) search ranking bias can be masked so that people show no awareness of the manipulation. We call this type of influence, which might be applicable to a variety of attitudes and beliefs, the search engine manipulation effect. Given that many elections are won by small margins, our results suggest that a search engine company has the power to influence the results of a substantial number of elections with impunity. The impact of such manipulations would be especially large in countries dominated by a single search engine company. PMID:26243876

  9. Search Engines for Electrical and Computer Engineers: Computer Jobs Store http://www.computerjobs.com/

    E-print Network

    Mountziaris, T. J.

    Search Engines for Electrical and Computer Engineers: · Computer Jobs Store http://www.computerjobs.com/ · ComputerWork.com http://www.computerwork.com/ · Computers & IT Jobs Page http://www.nationjob.com/computers · Job Search For Technology Professionals http://www.dice.com · IT Careers http

  10. The Role of Exploratory Talk in Classroom Search Engine Tasks

    ERIC Educational Resources Information Center

    Knight, Simon; Mercer, Neil

    2015-01-01

    While search engines are commonly used by children to find information, and in classroom-based activities, children are not adept in their information seeking or evaluation of information sources. Prior work has explored such activities in isolated, individual contexts, failing to account for the collaborative, discourse-mediated nature of search

  11. Paying Your Way to the Top: Search Engine Advertising.

    ERIC Educational Resources Information Center

    Scott, David M.

    2003-01-01

    Explains how organizations can buy listings on major Web search engines, making it the fastest growing form of advertising. Highlights include two network models, Google and Overture; bidding on phrases to buy as links to use with ads; ad ranking; benefits for small businesses; and paid listings versus regular search results. (LRW)

  12. How Safe Are Kid-Safe Search Engines?

    ERIC Educational Resources Information Center

    Masterson-Krum, Hope

    2001-01-01

    Examines search tools available to elementary and secondary school students, both human-compiled and crawler-based, to help direct them to age-appropriate Web sites; analyzes the procedures of search engines labeled family-friendly or kid safe that use filters; and tests the effectiveness of these services to students in school libraries. (LRW)

  13. A Tempo-Sensitive Music Search Engine With Multimodal Inputs

    E-print Network

    Wang, Ye

    A Tempo-Sensitive Music Search Engine With Multimodal Inputs Yu Yi School of Computing National of Singapore 117590 Singapore wangye@comp.nus.edu.sg ABSTRACT This paper presents TMSE: a novel Tempo a user searches for music by tempo. Our preliminary evaluation results indicate that multimodal inputs

  14. The Theory of Planned Behaviour Applied to Search Engines as a Learning Tool

    ERIC Educational Resources Information Center

    Liaw, Shu-Sheng

    2004-01-01

    Search engines have been developed for helping learners to seek online information. Based on theory of planned behaviour approach, this research intends to investigate the behaviour of using search engines as a learning tool. After factor analysis, the results suggest that perceived satisfaction of search engine, search engines as an information…

  15. Fully Automatic Wrapper Generation For Search Engines Hongkun Zhao, Weiyi Meng

    E-print Network

    Meng, Weiyi

    with search engines such as automatic construction and maintenance of metasearch engines and deep Web crawling the result pages returned by the search engines used. As another example, deep web crawling is to crawl documents or data records from (deep web) search engines [24] and it too needs to extract the search results

  16. Engineering Your Job Search: A Job-Finding Resource for Engineering Professionals.

    ERIC Educational Resources Information Center

    1995

    This guide, which is intended for engineering professionals, explains how to use up-to-date job search techniques to design and conduct an effective job hunt. The first 11 chapters discuss the following steps in searching for a job: handling a job loss; managing time and financial resources while conducting a full-time job search; using objective…

  17. Initial tests of thermoacoustic space power engine.

    SciTech Connect

    Backhaus, S. N.

    2002-01-01

    Future NASA deep-space missions will require radioisotope-powered electric generators that are just as reliable as current RTGs, but more efficient and of higher specific power (Wikg). Thennoacoustic engines at the -1-kW scale have converted high-temperature heat into acoustic, or PV, power without moving parts at 30% efficiency. Consisting of only tubes and a few heat exchangers, thennoacoustic engines are low mass and promise to be highly reliable. Coupling a thennoacoustic engine to a low mass, highly reliable and efficient linear alternator will create a heat-driven electric generator suitable for deep-space applications. Conversion efficiency data will be presented on a demonstration thennoacoustic engine designed for the 1 00-Watt power range.

  18. Devising rocket power for smaller engines

    SciTech Connect

    Burruss, R.

    1996-04-01

    Compact, high-power engines that burn fuel and oxygen could be made by winding copper tubing in a helix around boiler sections. With more than 1,000 horsepower per pound of engine weight, liquid-fueled rockets have the highest specific power of any engines designed for sustained operation. Yet those engines generally run for about only 1,000 seconds--nowhere near the sustained operation time for lower-power automotive and aircraft engines of more than 1,000 hours. In theory, at least, a fuel/oxygen rocket can be built that combines the best of both classes: high specific power (from perhaps two to 10 times that of a gas turbine) and a 1,000-hour service life. Such an engine would almost certainly be possible if the rocket`s exhaust gases could be simultaneously cooled and expanded by mixing water with the rocket`s exhaust and boiling it before it reaches the turbine. The technology itself is not new. variations of these rocket-turbine-type engines, for example, powered torpedoes during World War I. Some 30 years later, German V-2 rockets used fuel pumps, driven by the reaction of hydrogen peroxide with hydrocarbon fuels, to produce high-pressure steam that was directed against a turbine. Alternatively, fuel/oxygen combustion could produce steam to drive a piston engine. Either way, the challenge remains to construct a compact, long-service-life, high-specific-power boiler that burns fuel and oxygen. The new type of engine could be derived from recent research on electric vehicles (EVs).

  19. Building Blocks for Semantic Search Engines

    E-print Network

    Baeza-Yates, Ricardo

    context) such that · w is a mention of entity e · "Carl Sagan" or "Sagan" is a mention of the concept.g. Born in New York in 1934 , Sagan was a noted astronomer whose lifelong passion was searchingDigit isDDDD Where was Sagan born? type=region NEAR "Sagan" Name a physicist who searched for intelligent

  20. 14 CFR 121.181 - Airplanes: Reciprocating engine-powered: En route limitations: One engine inoperative.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...Airplanes: Reciprocating engine-powered: En route limitations: One engine inoperative...Airplanes: Reciprocating engine-powered: En route limitations: One engine inoperative...becomes inoperative at any point along the route, the flight will be able to...

  1. Power lever apparatus for a turbine engine

    SciTech Connect

    McCombs Jr., H. L.

    1985-05-21

    In a turbine engine having a compressor with a bleed valve and a variable geometry apparatus is responsive to an operational control member for regulating the flow rate of fuel supplied the turbine engine as a function of atmospheric pressure and the temperature of air supplied to the compressor corresponding to movement of a power lever by an operator to a desired operation of the turbine engine. The power lever has an indicator member fluidically connected to a follower member linked to the operational control member. The fluidic connection is responsive to operational parameters of the turbine engine and limits the rotational input to the follower member when the rate of fuel flow could cause stalling and the development of an unacceptable operating temperature or overspeed condition in the turbine engine.

  2. 14 CFR 121.193 - Airplanes: Turbine engine powered: En route limitations: Two engines inoperative.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 2013-01-01 false Airplanes: Turbine engine powered: En route limitations...Limitations § 121.193 Airplanes: Turbine engine powered: En route limitations... (SR 422). No person may operate a turbine engine powered airplane along an...

  3. 14 CFR 121.191 - Airplanes: Turbine engine powered: En route limitations: One engine inoperative.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 2012-01-01 false Airplanes: Turbine engine powered: En route limitations...Limitations § 121.191 Airplanes: Turbine engine powered: En route limitations...inoperative. (a) No person operating a turbine engine powered airplane may...

  4. 14 CFR 121.193 - Airplanes: Turbine engine powered: En route limitations: Two engines inoperative.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 2014-01-01 false Airplanes: Turbine engine powered: En route limitations...Limitations § 121.193 Airplanes: Turbine engine powered: En route limitations... (SR 422). No person may operate a turbine engine powered airplane along an...

  5. 14 CFR 121.191 - Airplanes: Turbine engine powered: En route limitations: One engine inoperative.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 2011-01-01 false Airplanes: Turbine engine powered: En route limitations...Limitations § 121.191 Airplanes: Turbine engine powered: En route limitations...inoperative. (a) No person operating a turbine engine powered airplane may...

  6. 14 CFR 121.191 - Airplanes: Turbine engine powered: En route limitations: One engine inoperative.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 2010-01-01 false Airplanes: Turbine engine powered: En route limitations...Limitations § 121.191 Airplanes: Turbine engine powered: En route limitations...inoperative. (a) No person operating a turbine engine powered airplane may...

  7. 14 CFR 121.193 - Airplanes: Turbine engine powered: En route limitations: Two engines inoperative.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 2010-01-01 false Airplanes: Turbine engine powered: En route limitations...Limitations § 121.193 Airplanes: Turbine engine powered: En route limitations... (SR 422). No person may operate a turbine engine powered airplane along an...

  8. 14 CFR 121.191 - Airplanes: Turbine engine powered: En route limitations: One engine inoperative.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 2014-01-01 false Airplanes: Turbine engine powered: En route limitations...Limitations § 121.191 Airplanes: Turbine engine powered: En route limitations...inoperative. (a) No person operating a turbine engine powered airplane may...

  9. 14 CFR 121.191 - Airplanes: Turbine engine powered: En route limitations: One engine inoperative.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 2013-01-01 false Airplanes: Turbine engine powered: En route limitations...Limitations § 121.191 Airplanes: Turbine engine powered: En route limitations...inoperative. (a) No person operating a turbine engine powered airplane may...

  10. 14 CFR 121.193 - Airplanes: Turbine engine powered: En route limitations: Two engines inoperative.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 2012-01-01 false Airplanes: Turbine engine powered: En route limitations...Limitations § 121.193 Airplanes: Turbine engine powered: En route limitations... (SR 422). No person may operate a turbine engine powered airplane along an...

  11. 14 CFR 121.193 - Airplanes: Turbine engine powered: En route limitations: Two engines inoperative.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 2011-01-01 false Airplanes: Turbine engine powered: En route limitations...Limitations § 121.193 Airplanes: Turbine engine powered: En route limitations... (SR 422). No person may operate a turbine engine powered airplane along an...

  12. Science and Engineering at The University of Edinburgh Site search: Search words Logout rsh End Edit

    E-print Network

    Haszeldine, Stuart

    Science and Engineering at The University of Edinburgh Site search: Search words Logout rsh End Edit Internal breadcrumbs: Home >> Research >> Earth and Planetary Science >> CCS, carbon capture and storage, Diagenesis School of GeoSciences Earth and Planetary Science Edit: Page | Wysiwyg | Metadata

  13. Stirling engines. (Latest citations from the COMPENDEX database). Published Search

    SciTech Connect

    Not Available

    1992-12-01

    The bibliography contains citations concerning Stirling engine technology. Design, development, performance testing, and applications are discussed, including power generation, cryogenic cooling, solar power applications, and ground and marine vehicles. The citations also examine engine component design and material testing results. (Contains 250 citations and includes a subject term index and title list.)

  14. The Way to Increased Airplane Engine Power

    NASA Technical Reports Server (NTRS)

    Vohrer, Eugen

    1939-01-01

    The purpose of this paper is to give an outline of the present state of development and point out the possibilities available for the further increase in the power/displacement ratio, the economy, and the reliability of the engine. Some of the aspects discussed are methods of increasing take-off power, the various methods of preparation of the fuel mixture and their effect on power, economy, and safety.

  15. Determining the User Intent of Web Search Engine Queries Bernard J. Jansen, Danielle L. Booth

    E-print Network

    Jansen, James

    . INTRODUCTION The Web has become an indispensable aspect in the lives of many people, and search engines these Web search engines? How can we determine what these people are seeking? What task, goal, need, or intent are they trying to address with their Web searching? Web search engines can help people find

  16. Hierarchical Structural Approach to Improving the Browsability of Web Search Engine Results

    E-print Network

    Zaiane, Osmar R.

    Hierarchical Structural Approach to Improving the Browsability of Web Search Engine Results Hang,zaiane}@cs.ualberta.ca Abstract Web users have been mainly relying on Web search engines to find information of interest on the Web. However, two key issues remain with traditional Web search engines: the browsability of searching

  17. Internet Power Searching: Finding Pearls in a Zillion Grains of Sand.

    ERIC Educational Resources Information Center

    Kassel, Amelia

    1999-01-01

    Discusses searching on the World Wide Web. Highlights include search-engine size; features of the six largest search engines; features of five metasearch engines; intelligent agents; two Web sites for difficult-to-find information, including industry statistics and market data; Internet publishers and databases; specialty search engines; and…

  18. New Capabilities in the Astrophysics Multispectral Archive Search Engine

    NASA Astrophysics Data System (ADS)

    Cheung, C. Y.; Kelley, S.; Roussopoulos, N.

    The Astrophysics Multispectral Archive Search Engine (AMASE) uses object-oriented database techniques to provide a uniform multi-mission and multi-spectral interface to search for data in the distributed archives. We describe our experience of porting AMASE from Illustra object-relational DBMS to the Informix Universal Data Server. New capabilities and utilities have been developed, including a spatial datablade that supports Nearest Neighbor queries.

  19. Two-Level Smart Search Engine Using Ontology-Based Semantic Reasoning

    E-print Network

    Xu, Haiping

    Two-Level Smart Search Engine Using Ontology- Based Semantic Reasoning Haiping Xu and Arturo W. Li engines, in this paper, we introduce an approach to developing a smart search engine using ontology ontology. The search engine consists of two levels, namely the semantic reasoning level and the traditional

  20. The Citation Search Engine Master Thesis

    E-print Network

    Jäger, Gerhard

    to build enhanced search systems that can facilitate IR. Particularly, we target an IR task for scientific system that automatically extracts, indexes and aggregates citations from collections of scientific articles in a PDF format. We evaluated the capabilities of CiteWise by conducting user evaluation experi

  1. Shuttle Engine Designs Revolutionize Solar Power

    NASA Technical Reports Server (NTRS)

    2014-01-01

    The Space Shuttle Main Engine was built under contract to Marshall Space Flight Center by Rocketdyne, now part of Pratt & Whitney Rocketdyne (PWR). PWR applied its NASA experience to solar power technology and licensed the technology to Santa Monica, California-based SolarReserve. The company now develops concentrating solar power projects, including a plant in Nevada that has created 4,300 jobs during construction.

  2. Automated Power Assessment for Helicopter Turboshaft Engines

    NASA Technical Reports Server (NTRS)

    Simon, Donald L.; Litt, Jonathan S.

    2008-01-01

    An accurate indication of available power is required for helicopter mission planning purposes. Available power is currently estimated on U.S. Army Blackhawk helicopters by performing a Maximum Power Check (MPC), a manual procedure performed by maintenance pilots on a periodic basis. The MPC establishes Engine Torque Factor (ETF), an indication of available power. It is desirable to replace the current manual MPC procedure with an automated approach that will enable continuous real-time assessment of available power utilizing normal mission data. This report presents an automated power assessment approach which processes data currently collected within helicopter Health and Usage Monitoring System (HUMS) units. The overall approach consists of: 1) a steady-state data filter which identifies and extracts steady-state operating points within HUMS data sets; 2) engine performance curve trend monitoring and updating; and 3) automated ETF calculation. The algorithm is coded in MATLAB (The MathWorks, Inc.) and currently runs on a PC. Results from the application of this technique to HUMS mission data collected from UH-60L aircraft equipped with T700-GE-701C engines are presented and compared to manually calculated ETF values. Potential future enhancements are discussed.

  3. Space power demonstrator engine, phase 1

    NASA Technical Reports Server (NTRS)

    1987-01-01

    The design, analysis, and preliminary test results for a 25 kWe Free-Piston Stirling engine with integral linear alternators are described. The project is conducted by Mechanical Technology under the direction of LeRC as part of the SP-100 Nuclear Space Power Systems Program. The engine/alternator system is designed to demonstrate the following performance: (1) 25 kWe output at a specific weight less than 8 kg/kW; (2) 25 percent efficiency at a temperature ratio of 2.0; (3) low vibration (amplitude less than .003 in); (4) internal gas bearings (no wear, no external pump); and (5) heater temperature/cooler temperature from 630 to 315 K. The design approach to minimize vibration is a two-module engine (12.5 kWe per module) in a linearly-opposed configuration with a common expansion space. The low specific weight is obtained at high helium pressure (150 bar) and high frequency (105 Hz) and by using high magnetic strength (samarium cobalt) alternator magnets. Engine tests began in June 1985; 16 months following initiation of engine and test cell design. Hydrotest and consequent engine testing to date has been intentionally limited to half pressure, and electrical power output is within 15 to 20 percent of design predictions.

  4. Space power demonstrator engine, phase 1

    NASA Astrophysics Data System (ADS)

    1987-05-01

    The design, analysis, and preliminary test results for a 25 kWe Free-Piston Stirling engine with integral linear alternators are described. The project is conducted by Mechanical Technology under the direction of LeRC as part of the SP-100 Nuclear Space Power Systems Program. The engine/alternator system is designed to demonstrate the following performance: (1) 25 kWe output at a specific weight less than 8 kg/kW; (2) 25 percent efficiency at a temperature ratio of 2.0; (3) low vibration (amplitude less than .003 in); (4) internal gas bearings (no wear, no external pump); and (5) heater temperature/cooler temperature from 630 to 315 K. The design approach to minimize vibration is a two-module engine (12.5 kWe per module) in a linearly-opposed configuration with a common expansion space. The low specific weight is obtained at high helium pressure (150 bar) and high frequency (105 Hz) and by using high magnetic strength (samarium cobalt) alternator magnets. Engine tests began in June 1985; 16 months following initiation of engine and test cell design. Hydrotest and consequent engine testing to date has been intentionally limited to half pressure, and electrical power output is within 15 to 20 percent of design predictions.

  5. A Competitive and Experiential Assignment in Search Engine Optimization Strategy

    ERIC Educational Resources Information Center

    Clarke, Theresa B.; Clarke, Irvine, III

    2014-01-01

    Despite an increase in ad spending and demand for employees with expertise in search engine optimization (SEO), methods for teaching this important marketing strategy have received little coverage in the literature. Using Bloom's cognitive goals hierarchy as a framework, this experiential assignment provides a process for educators who may be…

  6. Dynamic Adaptive Search Based Software Engineering Mark Harman1

    E-print Network

    Harman, Mark

    Dynamic Adaptive Search Based Software Engineering Mark Harman1 , Edmund Burke2 , John A. Clark3) in Lund, Sweden. It is joint work with Edmund Burke, John Clark and Xin Yao, funded by the EPSRC programme Berner and Mattner and Daimler [49, 64], Ericsson [3], Google [69] and Microsoft [14, 50], and work

  7. Propagating Expiration Decisions in a Search Engine Result Cache

    E-print Network

    Ulusoy, Özgür

    Propagating Expiration Decisions in a Search Engine Result Cache Fethi Burak Sazoglu Bilkent the expiration decision for a query to similar queries in the cache to re-adjust their time-to-live values. 1 only if its TTL has not yet expired. Cam- bazoglu et al. [6] proposed such a proactive strategy, which

  8. Detecting influenza epidemics using search engine Jeremy Ginsberg1

    E-print Network

    Cortes, Corinna

    Detecting influenza epidemics using search engine query data Jeremy Ginsberg1 , Matthew H. Mohebbi1 for Disease Control and Prevention Epidemics of seasonal influenza are a major public health concern, causing . In addition to seasonal influenza, a new strain of influenza virus against which no prior immunity exists

  9. PR Students' Perceptions and Readiness for Using Search Engine Optimization

    ERIC Educational Resources Information Center

    Moody, Mia; Bates, Elizabeth

    2013-01-01

    Enough evidence is available to support the idea that public relations professionals must possess search engine optimization (SEO) skills to assist clients in a full-service capacity; however, little research exists on how much college students know about the tactic and best practices for incorporating SEO into course curriculum. Furthermore, much…

  10. A Dataset Search Engine for the Research Document Corpus

    E-print Network

    Greenberg, Albert

    A Dataset Search Engine for the Research Document Corpus Meiyu Lu # , Srinivas Bangalore , Graham no useful tools for researchers to understand which datasets have been used for what purpose, or in what prior work. Instead, they have to manually browse through papers to find suitable datasets

  11. A Dataset Search Engine for the Research Document Corpus

    E-print Network

    Cormode, Graham

    A Dataset Search Engine for the Research Document Corpus Meiyu Lu # , Srinivas Bangalore , Graham a proposed idea or system is to evaluate over a suitable dataset. However, to this date there have been no useful tools for researchers to understand which datasets have been used for what purpose, or in what

  12. Through the Google Goggles: Sociopolitical Bias in Search Engine Design

    NASA Astrophysics Data System (ADS)

    Diaz, A.

    Search engines like Google are essential to navigating the Web's endless supply of news, political information, and citizen discourse. The mechanisms and conditions under which search results are selected should therefore be of considerable interest to media scholars, political theorists, and citizens alike. In this chapter, I adopt a "deliberative" ideal for search engines and examine whether Google exhibits the "same old" media biases of mainstreaming, hypercommercialism, and industry consolidation. In the end, serious objections to Google are raised: Google may favor popularity over richness; it provides advertising that competes directly with "editorial" content; it so overwhelmingly dominates the industry that users seldom get a second opinion, and this is unlikely to change. Ultimately, however, the results of this analysis may speak less about Google than about contradictions in the deliberative ideal and the so-called "inherently democratic" nature of the Web.

  13. Engineering innovation to reduce wind power COE

    SciTech Connect

    Ammerman, Curtt Nelson

    2011-01-10

    There are enough wind resources in the US to provide 10 times the electric power we currently use, however wind power only accounts for 2% of our total electricity production. One of the main limitations to wind use is cost. Wind power currently costs 5-to-8 cents per kilowatt-hour, which is more than twice the cost of electricity generated by burning coal. Our Intelligent Wind Turbine LDRD Project is applying LANL's leading-edge engineering expertise in modeling and simulation, experimental validation, and advanced sensing technologies to challenges faced in the design and operation of modern wind turbines.

  14. A Search Engine That's Aware of Your Needs

    NASA Technical Reports Server (NTRS)

    2005-01-01

    Internet research can be compared to trying to drink from a firehose. Such a wealth of information is available that even the simplest inquiry can sometimes generate tens of thousands of leads, more information than most people can handle, and more burdensome than most can endure. Like everyone else, NASA scientists rely on the Internet as a primary search tool. Unlike the average user, though, NASA scientists perform some pretty sophisticated, involved research. To help manage the Internet and to allow researchers at NASA to gain better, more efficient access to the wealth of information, the Agency needed a search tool that was more refined and intelligent than the typical search engine. Partnership NASA funded Stottler Henke, Inc., of San Mateo, California, a cutting-edge software company, with a Small Business Innovation Research (SBIR) contract to develop the Aware software for searching through the vast stores of knowledge quickly and efficiently. The partnership was through NASA s Ames Research Center.

  15. eBizSearch: A Niche Search Engine for e-Business C. Lee Giles1,2,3

    E-print Network

    Giles, C. Lee

    eBizSearch: A Niche Search Engine for e-Business C. Lee Giles1,2,3 , Yves Petinot2 , Pradeep B Pond Lab. University Park, PA 16802 {petinot, hhan} @cse.psu.edu 3 eBusiness Research Center discuss a new niche search engine, eBizSearch, based on the technology of CiteSeer and dedicated to e-business

  16. The Effectiveness of Web Search Engines to Index New Sites from Different Countries

    ERIC Educational Resources Information Center

    Pirkola, Ari

    2009-01-01

    Introduction: Investigates how effectively Web search engines index new sites from different countries. The primary interest is whether new sites are indexed equally or whether search engines are biased towards certain countries. If major search engines show biased coverage it can be considered a significant economic and political problem because…

  17. Editorial to the special issue of Computers & Operations Research on Search-Based Software Engineering

    E-print Network

    Gutjahr, Walter

    on the application of optimization and metaheuristic search techniques to problems in software engineering. Optimization and search based techniques have been applied to a wide range of software engineering problems as Search Based Software Engineering (SBSE) [5, 10]. The past five years have wit- ness a dramatic growth

  18. Using Ontology Search Engines to support Users and Intelligent Systems solving a range of

    E-print Network

    Sleeman, Derek

    Using Ontology Search Engines to support Users and Intelligent Systems solving a range of tasks D or a (distantly) related concept. We describe how an ontology search engine has assisted in solving such problems, and by reporting which concepts are related to the central concept. The search engine used in this work has been

  19. Full Elastic Waveform Search Engine for Near Surface Imaging

    NASA Astrophysics Data System (ADS)

    Zhang, J.; Zhang, X.

    2014-12-01

    For processing land seismic data, the near-surface problem is often very complex and may severely affect our capability to image the subsurface. The current state-of-the-art technology for near surface imaging is the early arrival waveform inversion that solves an acoustic wave-equation problem. However, fitting land seismic data with acoustic wavefield is sometimes invalid. On the other hand, performing elastic waveform inversion is very time-consuming. Similar to a web search engine, we develop a full elastic waveform search engine that includes a large database with synthetic elastic waveforms accounting for a wide range of interval velocity models in the CMP domain. With each CMP gather of real data as an entry, the search engine applies Multiple-Randomized K-Dimensional (MRKD) tree method to find approximate best matches to the entry in about a second. Interpolation of the velocity models at CMP positions creates 2D or 3D Vp, Vs, and density models for the near surface area. The method does not just return one solution; it gives a series of best matches in a solution space. Therefore, the results can help us to examine the resolution and nonuniqueness of the final solution. Further, this full waveform search method can avoid the issues of initial model and cycle skipping that the method of full waveform inversion is difficult to deal with.

  20. Next-Generation Search Engines for Information Retrieval

    SciTech Connect

    Devarakonda, Ranjeet; Hook, Leslie A; Palanisamy, Giri; Green, James M

    2011-01-01

    In the recent years, there have been significant advancements in the areas of scientific data management and retrieval techniques, particularly in terms of standards and protocols for archiving data and metadata. Scientific data is rich, and spread across different places. In order to integrate these pieces together, a data archive and associated metadata should be generated. Data should be stored in a format that can be retrievable and more importantly it should be in a format that will continue to be accessible as technology changes, such as XML. While general-purpose search engines (such as Google or Bing) are useful for finding many things on the Internet, they are often of limited usefulness for locating Earth Science data relevant (for example) to a specific spatiotemporal extent. By contrast, tools that search repositories of structured metadata can locate relevant datasets with fairly high precision, but the search is limited to that particular repository. Federated searches (such as Z39.50) have been used, but can be slow and the comprehensiveness can be limited by downtime in any search partner. An alternative approach to improve comprehensiveness is for a repository to harvest metadata from other repositories, possibly with limits based on subject matter or access permissions. Searches through harvested metadata can be extremely responsive, and the search tool can be customized with semantic augmentation appropriate to the community of practice being served. One such system, Mercury, a metadata harvesting, data discovery, and access system, built for researchers to search to, share and obtain spatiotemporal data used across a range of climate and ecological sciences. Mercury is open-source toolset, backend built on Java and search capability is supported by the some popular open source search libraries such as SOLR and LUCENE. Mercury harvests the structured metadata and key data from several data providing servers around the world and builds a centralized index. The harvested files are indexed against SOLR search API consistently, so that it can render search capabilities such as simple, fielded, spatial and temporal searches across a span of projects ranging from land, atmosphere, and ocean ecology. Mercury also provides data sharing capabilities using Open Archive Initiatives Protocol for Metadata Handling (OAI-PMH). In this paper we will discuss about the best practices for archiving data and metadata, new searching techniques, efficient ways of data retrieval and information display.

  1. Finding Business Information on the "Invisible Web": Search Utilities vs. Conventional Search Engines.

    ERIC Educational Resources Information Center

    Darrah, Brenda

    Researchers for small businesses, which may have no access to expensive databases or market research reports, must often rely on information found on the Internet, which can be difficult to find. Although current conventional Internet search engines are now able to index over on billion documents, there are many more documents existing in…

  2. Power control for hot gas engines

    NASA Technical Reports Server (NTRS)

    Macglashan, W. F. (inventor)

    1980-01-01

    A hot gas engine in which the expander piston of the engine is connected to an expander crankshaft. A displacer piston of the engine is connected to a separate displacer crankshaft which may or may not be coaxial with the expander crankshaft. A phase angle control mechanism used as a power control for changing the phase angle between the expander and displacer crankshaft is located between the two crankshafts. The phase angle control mechanism comprises a differential type mechanism comprised of a pair of gears, as for example, bevel gears, one of which is connected to one end of the expander crankshaft and the other of which is connected to the opposite end of the displacer crankshaft. A mating bevel gear is disposed in meshing engagement with the first two level gears to provide a phase angle control between the two crankshafts. Other forms of differential mechanisms may be used including conventional spur gears connected in a differential type arrangement.

  3. Arctic Data Explorer: A Rich Solr Powered Metadata Search Portal

    NASA Astrophysics Data System (ADS)

    Liu, M.; Truslove, I.; Yarmey, L.; Lopez, L.; Reed, S. A.; Brandt, M.

    2013-12-01

    The Advanced Cooperative Arctic Data and Information Service (ACADIS) manages data and is the gateway for all relevant Arctic physical, life, and social science data for the Arctic Sciences (ARC) research community. Arctic Data Explorer (ADE), developed by the National Snow and Ice Data Center (NSIDC) under the ACADIS umbrella, is a data portal that provides users the ability to search across multiple Arctic data catalogs rapidly and precisely. In order to help the users quickly find the data they are interested in, we provided a simple search interface -- a search box with spatial and temporal options. The core of the interface is a ';google-like' single search box with logic to handle complex queries behind the scenes. ACADIS collects all metadata through the GI-Cat metadata broker service and indexes it in Solr. The single search box is implemented as a text based search utilizing the powerful tools provided by Solr. In this poster, we briefly explain Solr's indexing and searching capabilities. Several examples are presented to illustrate the rich search functionality the simple search box supports. Then we dive into the implementation details such as how phrase query, wildcard query, range query, fuzzy query and special query search term handling was integrated into ADE search. To provide our users the most relevant answers to their queries as quickly as possible, we worked with the Advisory Committee and the expanding Arctic User Community (scientists and data experts) to collect feedback to improve the search results and adjust the relevance/ranking logic to return more precise search results. The poster has specific examples on how we tuned the relevance ranking to achieve higher quality search results. A feature in the plan is to provide data sets recommendations based on user's current search history. Both collaborative filtering and content-based approaches were considered and researched. A feasible solution is proposed based on the content-based approach.

  4. Solar power satellites: The Engineering Challenges

    NASA Technical Reports Server (NTRS)

    Woodcock, G. R.

    1978-01-01

    Certain elements of solar power satellite design and system engineering studies are reviewed analyzing solar power satellites as a potential baseload electric power source. The complete system concept concept includes not only the satellites and their ground stations, but also the space transportation for delivery of the satellites, piece by piece, into space, and the factories for their construction in space. Issues related to carrying the solar power satellite concept from the present design study phase through implementation of actual hardware are considered. The first issue category is environmental aspects of the SPS systems. The second category of issues is the technology risks associated with achieving the necessary component and subsystem performances. The third category includes the engineering issues associated with carrying out such a large scale project. The fourth issue category is financial: the funding required to bring such a project into being and the costs of the satellites and resulting cost of the power produced as compared to potential alternative energy sources.

  5. Noesis: Ontology based Scoped Search Engine and Resource Aggregator for Atmospheric Science

    NASA Astrophysics Data System (ADS)

    Ramachandran, R.; Movva, S.; Li, X.; Cherukuri, P.; Graves, S.

    2006-12-01

    The goal for search engines is to return results that are both accurate and complete. The search engines should find only what you really want and find everything you really want. Search engines (even meta search engines) lack semantics. The basis for search is simply based on string matching between the user's query term and the resource database and the semantics associated with the search string is not captured. For example, if an atmospheric scientist is searching for "pressure" related web resources, most search engines return inaccurate results such as web resources related to blood pressure. In this presentation Noesis, which is a meta-search engine and a resource aggregator that uses domain ontologies to provide scoped search capabilities will be described. Noesis uses domain ontologies to help the user scope the search query to ensure that the search results are both accurate and complete. The domain ontologies guide the user to refine their search query and thereby reduce the user's burden of experimenting with different search strings. Semantics are captured by refining the query terms to cover synonyms, specializations, generalizations and related concepts. Noesis also serves as a resource aggregator. It categorizes the search results from different online resources such as education materials, publications, datasets, web search engines that might be of interest to the user.

  6. ST_EPTS 9/20/2007 Gale Databases Operating on the PowerSearch Platform Search Tips

    E-print Network

    Murty, Ram

    locations, organizations, people, etc. Basic Search by Keyword: Lets you search on significant fieldsST_EPTS 9/20/2007 Gale Databases Operating on the PowerSearch Platform ­ Search Tips CHOOSE need or select a combination of databases to cross search. · Academic OneFile · General One

  7. LoyalTracker: Visualizing Loyalty Dynamics in Search Engines.

    PubMed

    Shi, Conglei; Wu, Yingcai; Liu, Shixia; Zhou, Hong; Qu, Huamin

    2014-12-01

    The huge amount of user log data collected by search engine providers creates new opportunities to understand user loyalty and defection behavior at an unprecedented scale. However, this also poses a great challenge to analyze the behavior and glean insights into the complex, large data. In this paper, we introduce LoyalTracker, a visual analytics system to track user loyalty and switching behavior towards multiple search engines from the vast amount of user log data. We propose a new interactive visualization technique (flow view) based on a flow metaphor, which conveys a proper visual summary of the dynamics of user loyalty of thousands of users over time. Two other visualization techniques, a density map and a word cloud, are integrated to enable analysts to gain further insights into the patterns identified by the flow view. Case studies and the interview with domain experts are conducted to demonstrate the usefulness of our technique in understanding user loyalty and switching behavior in search engines. PMID:26356887

  8. Power Systems Engineering Research Center PSERC Background Paper

    E-print Network

    Power Systems Engineering Research Center PSERC Background Paper What is Reactive Power? Peter W-Champaign September 16, 2003 Engineering talk Reactive power is a quantity that is normally only defined time). In that sense, these are pulsating quantities. Because of this, the power being transmitted down

  9. Power Systems Engineering Research Center Dennis Ray Ward Jewell

    E-print Network

    Power Systems Engineering Research Center Dennis Ray Ward Jewell Executive Director, Power Systems-Learjet Fellow Madison, WI 53706-1691 Director, Power Quality Laboratory djray@engr.wisc.edu Wichita State an overview of the Power Systems Engineering Research Center (PSERC), a National Science Foundation Industry

  10. 40 CFR 1039.140 - What is my engine's maximum engine power?

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 false What is my engine's maximum engine power? 1039.140 Section...PROTECTION AGENCY (CONTINUED) AIR POLLUTION CONTROLS CONTROL OF EMISSIONS...NONROAD COMPRESSION-IGNITION ENGINES Emission Standards and...

  11. SearchResultFinder: Federated Search Made Easy Dolf Trieschnigg, Kien Tjin-Kam-Jet and Djoerd Hiemstra

    E-print Network

    Hiemstra, Djoerd

    SearchResultFinder: Federated Search Made Easy Dolf Trieschnigg, Kien Tjin-Kam-Jet and Djoerd Building a federated search engine based on a large number existing web search engines is a challenge, Scraper, Wrapper, Search result extraction 1. INTRODUCTION Federated search engines combine the power

  12. In Search of an Alternative Power Base.

    ERIC Educational Resources Information Center

    Elliott, John

    1981-01-01

    Argues that naturalistic researchers in education who wish to effect change must switch their power base from the bureaucratized educational administration to special interest and pressure groups at the grass roots level. (APM)

  13. GeoSearcher: Location-Based Ranking of Search Engine Results.

    ERIC Educational Resources Information Center

    Watters, Carolyn; Amoudi, Ghada

    2003-01-01

    Discussion of Web queries with geospatial dimensions focuses on an algorithm that assigns location coordinates dynamically to Web sites based on the URL. Describes a prototype search system that uses the algorithm to re-rank search engine results for queries with a geospatial dimension, thus providing an alternative ranking order for search engine

  14. Hot Topic: Ontological Framework for a Free-Form Query Based Grid Search Engine

    E-print Network

    Meng, Weiyi

    Hot Topic: Ontological Framework for a Free-Form Query Based Grid Search Engine Chaitali Gupta, and invocation. 1. GRID SERVICES SEARCH ENGINE Just as most computer users today do not have to write programs@cs.binghamton.edu ABSTRACT If the model of free-form queries, which has proved successful for HTML based search on the Web

  15. Integrating COTS Search Engines into Eclipse: Google Desktop Case Study Denys Poshyvanyk, Maksym Petrenko, Andrian Marcus

    E-print Network

    Poshyvanyk, Denys

    Integrating COTS Search Engines into Eclipse: Google Desktop Case Study Denys Poshyvanyk, Maksym (GDS) engine into the Eclipse development environment. The resulting tool, namely Google Eclipse Search (GES), provides enhanced searching in Eclipse software projects. The paper advocates for a COTS

  16. Guided Google: A Meta Search Engine and its Implementation using the Google Distributed Web Services

    E-print Network

    Melbourne, University of

    1 Guided Google: A Meta Search Engine and its Implementation using the Google Distributed Web in recent years. For instance, Google, which is one of the popular search engines, supports Web Services that allow external applications to issue Web search queries that are actually processed using a Google

  17. 14 CFR 121.181 - Airplanes: Reciprocating engine-powered: En route limitations: One engine inoperative.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 3 2011-01-01 2011-01-01 false Airplanes: Reciprocating engine-powered: En... OPERATIONS Airplane Performance Operating Limitations § 121.181 Airplanes: Reciprocating engine-powered: En... person operating a reciprocating engine powered airplane may take off that airplane at a weight,...

  18. 14 CFR 121.181 - Airplanes: Reciprocating engine-powered: En route limitations: One engine inoperative.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 3 2014-01-01 2014-01-01 false Airplanes: Reciprocating engine-powered: En... OPERATIONS Airplane Performance Operating Limitations § 121.181 Airplanes: Reciprocating engine-powered: En... person operating a reciprocating engine powered airplane may take off that airplane at a weight,...

  19. 14 CFR 121.181 - Airplanes: Reciprocating engine-powered: En route limitations: One engine inoperative.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Airplanes: Reciprocating engine-powered: En... OPERATIONS Airplane Performance Operating Limitations § 121.181 Airplanes: Reciprocating engine-powered: En... person operating a reciprocating engine powered airplane may take off that airplane at a weight,...

  20. 14 CFR 121.181 - Airplanes: Reciprocating engine-powered: En route limitations: One engine inoperative.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 3 2012-01-01 2012-01-01 false Airplanes: Reciprocating engine-powered: En... OPERATIONS Airplane Performance Operating Limitations § 121.181 Airplanes: Reciprocating engine-powered: En... person operating a reciprocating engine powered airplane may take off that airplane at a weight,...

  1. 14 CFR 121.181 - Airplanes: Reciprocating engine-powered: En route limitations: One engine inoperative.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 3 2013-01-01 2013-01-01 false Airplanes: Reciprocating engine-powered: En... OPERATIONS Airplane Performance Operating Limitations § 121.181 Airplanes: Reciprocating engine-powered: En... person operating a reciprocating engine powered airplane may take off that airplane at a weight,...

  2. Searching for safety: addressing search engine, website, and provider accountability for illicit online drug sales.

    PubMed

    Liang, Bryan A; Mackey, Tim

    2009-01-01

    Online sales of pharmaceuticals are a rapidly growing phenomenon. Yet despite the dangers of purchasing drugs over the Internet, sales continue to escalate. These dangers include patient harm from fake or tainted drugs, lack of clinical oversight, and financial loss. Patients, and in particular vulnerable groups such as seniors and minorities, purchase drugs online either naïvely or because they lack the ability to access medications from other sources due to price considerations. Unfortunately, high risk online drug sources dominate the Internet, and virtually no accountability exists to ensure safety of purchased products. Importantly, search engines such as Google, Yahoo, and MSN, although purportedly requiring "verification" of Internet drug sellers using PharmacyChecker.com requirements, actually allow and profit from illicit drug sales from unverified websites. These search engines are not held accountable for facilitating clearly illegal activities. Both website drug seller anonymity and unethical physicians approving or writing prescriptions without seeing the patient contribute to rampant illegal online drug sales. Efforts in this country and around the world to stem the tide of these sales have had extremely limited effectiveness. Unfortunately, current congressional proposals are fractionated and do not address the key issues of demand by vulnerable patient populations, search engine accountability, and the ease with which financial transactions can be consummated to promote illegal online sales. To deal with the social scourge of illicit online drug sales, this article proposes a comprehensive statutory solution that creates a no-cost/low-cost national Drug Access Program to break the chain of demand from vulnerable patient populations and illicit online sellers, makes all Internet drug sales illegal unless the Internet pharmacy is licensed through a national Internet pharmacy licensing program, prohibits financial transactions for illegal online drug sales, and establishes criminal penalties for all parties -- including websites, search engines, and health care providers -- who engage in and facilitate this harmful activity. PMID:19534258

  3. Feature extractor and search engine for automatic object recognition

    NASA Astrophysics Data System (ADS)

    Freire, Joao C.; Correia, Bento A. B.

    1998-10-01

    Automatic object recognition methodologies are being used increasingly in the automation of many industrial processes. However, the specific nature of each system usually implies an intensive development effort. Aiming to control and constrain such effort, this paper presents a processing architecture that promotes the reutilization of common system modules. The approach described covers the whole processing chain by connecting low-level pre-processing to the final classification stage, specially emphasizing the segmentation and feature extraction levels. The resulting core is a search engine based on the data structure of a graph. This structure is initially fed with raw edge information extracted from the original raster image representation. The edge segments used at this preliminary version of the graph are the result of a multistage process of edge following and edge linking. The use of image properties at high levels of abstraction allows the dimensions of the search space to be significantly reduced. Modularity and reutilization allows the refinement of an initial low-level representation of information into successive higher levels of description, until a final set of features that may directly feed a classifier is achieved. Parallel contours, constant curvature edge segments and closed contours of a given shape are a few examples of the features easily defined within this architecture and that can be extracted by the search engine implemented.

  4. Design and Implementation of a Geographic Search Engine Alexander Markowetz 1

    E-print Network

    Eckmiller, Rolf

    taking up yoga, local yoga schools are often of much higher interest than those of the world's ten biggest yoga schools. We expect that geographic search engines, i.e., search engines that support engine looking for a yoga school in or close to Brooklyn may end up trying queries such as (yoga AND new

  5. Modeling Long-Term Search Engine Usage Ryen W. White, Ashish Kapoor, and Susan T. Dumais

    E-print Network

    Dumais, Susan

    of search engines and their relationship with user satisfaction. We also explore methods to determine, interface usability, and satisfaction [14], and can significantly impact their overall level of search,10,19], and promoting the use of multiple engines for the current query if another engine has better results [18]. Given

  6. Centre Hydraulic Power Supply Unit University of Saskatchewan -Mechanical Engineering Fluid Power and Controls

    E-print Network

    Saskatchewan, University of

    Centre Hydraulic Power Supply Unit University of Saskatchewan - Mechanical Engineering ­ Fluid Power and Controls ID: FP0003 Rev: 001 Date: May 31, 2010 Page: 1 of 7 Centre Hydraulic Power Supply;Centre Hydraulic Power Supply Unit University of Saskatchewan - Mechanical Engineering ­ Fluid Power

  7. Understanding Crowd-Powered Search Groups: A Social Network Perspective

    PubMed Central

    Zhang, Qingpeng; Wang, Fei-Yue; Zeng, Daniel; Wang, Tao

    2012-01-01

    Background Crowd-powered search is a new form of search and problem solving scheme that involves collaboration among a potentially large number of voluntary Web users. Human flesh search (HFS), a particular form of crowd-powered search originated in China, has seen tremendous growth since its inception in 2001. HFS presents a valuable test-bed for scientists to validate existing and new theories in social computing, sociology, behavioral sciences, and so forth. Methodology In this research, we construct an aggregated HFS group, consisting of the participants and their relationships in a comprehensive set of identified HFS episodes. We study the topological properties and the evolution of the aggregated network and different sub-groups in the network. We also identify the key HFS participants according to a variety of measures. Conclusions We found that, as compared with other online social networks, HFS participant network shares the power-law degree distribution and small-world property, but with a looser and more distributed organizational structure, leading to the diversity, decentralization, and independence of HFS participants. In addition, the HFS group has been becoming increasingly decentralized. The comparisons of different HFS sub-groups reveal that HFS participants collaborated more often when they conducted the searches in local platforms or the searches requiring a certain level of professional knowledge background. On the contrary, HFS participants did not collaborate much when they performed the search task in national platforms or the searches with general topics that did not require specific information and learning. We also observed that the key HFS information contributors, carriers, and transmitters came from different groups of HFS participants. PMID:22761888

  8. Curating the Web: Building a Google Custom Search Engine for the Arts

    ERIC Educational Resources Information Center

    Hennesy, Cody; Bowman, John

    2008-01-01

    Google's first foray onto the web made search simple and results relevant. With its Co-op platform, Google has taken another step toward dramatically increasing the relevancy of search results, further adapting the World Wide Web to local needs. Google Custom Search Engine, a tool on the Co-op platform, puts one in control of his or her own search

  9. EIIS: An Educational Information Intelligent Search Engine Supported by Semantic Services

    ERIC Educational Resources Information Center

    Huang, Chang-Qin; Duan, Ru-Lin; Tang, Yong; Zhu, Zhi-Ting; Yan, Yong-Jian; Guo, Yu-Qing

    2011-01-01

    The semantic web brings a new opportunity for efficient information organization and search. To meet the special requirements of the educational field, this paper proposes an intelligent search engine enabled by educational semantic support service, where three kinds of searches are integrated into Educational Information Intelligent Search (EIIS)…

  10. 14 CFR 135.381 - Large transport category airplanes: Turbine engine powered: En route limitations: One engine...

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... Large transport category airplanes: Turbine engine powered: En route limitations... Large transport category airplanes: Turbine engine powered: En route limitations...inoperative. (a) No person operating a turbine engine powered large transport...

  11. 14 CFR 135.383 - Large transport category airplanes: Turbine engine powered: En route limitations: Two engines...

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... Large transport category airplanes: Turbine engine powered: En route limitations... Large transport category airplanes: Turbine engine powered: En route limitations...1958 (SR422). No person may operate a turbine engine powered large transport...

  12. 14 CFR 135.381 - Large transport category airplanes: Turbine engine powered: En route limitations: One engine...

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... Large transport category airplanes: Turbine engine powered: En route limitations... Large transport category airplanes: Turbine engine powered: En route limitations...inoperative. (a) No person operating a turbine engine powered large transport...

  13. 14 CFR 135.383 - Large transport category airplanes: Turbine engine powered: En route limitations: Two engines...

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... Large transport category airplanes: Turbine engine powered: En route limitations... Large transport category airplanes: Turbine engine powered: En route limitations...1958 (SR422). No person may operate a turbine engine powered large transport...

  14. 14 CFR 135.381 - Large transport category airplanes: Turbine engine powered: En route limitations: One engine...

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... Large transport category airplanes: Turbine engine powered: En route limitations... Large transport category airplanes: Turbine engine powered: En route limitations...inoperative. (a) No person operating a turbine engine powered large transport...

  15. 14 CFR 135.381 - Large transport category airplanes: Turbine engine powered: En route limitations: One engine...

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... Large transport category airplanes: Turbine engine powered: En route limitations... Large transport category airplanes: Turbine engine powered: En route limitations...inoperative. (a) No person operating a turbine engine powered large transport...

  16. 14 CFR 135.383 - Large transport category airplanes: Turbine engine powered: En route limitations: Two engines...

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... Large transport category airplanes: Turbine engine powered: En route limitations... Large transport category airplanes: Turbine engine powered: En route limitations...1958 (SR422). No person may operate a turbine engine powered large transport...

  17. 14 CFR 135.383 - Large transport category airplanes: Turbine engine powered: En route limitations: Two engines...

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... Large transport category airplanes: Turbine engine powered: En route limitations... Large transport category airplanes: Turbine engine powered: En route limitations...1958 (SR422). No person may operate a turbine engine powered large transport...

  18. 14 CFR 135.381 - Large transport category airplanes: Turbine engine powered: En route limitations: One engine...

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... Large transport category airplanes: Turbine engine powered: En route limitations... Large transport category airplanes: Turbine engine powered: En route limitations...inoperative. (a) No person operating a turbine engine powered large transport...

  19. 14 CFR 135.383 - Large transport category airplanes: Turbine engine powered: En route limitations: Two engines...

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... Large transport category airplanes: Turbine engine powered: En route limitations... Large transport category airplanes: Turbine engine powered: En route limitations...1958 (SR422). No person may operate a turbine engine powered large transport...

  20. Integrated engine-generator concept for aircraft electric secondary power

    NASA Technical Reports Server (NTRS)

    Secunde, R. R.; Macosko, R. P.; Repas, D. S.

    1972-01-01

    The integrated engine-generator concept of locating an electric generator inside an aircraft turbojet or turbofan engine concentric with, and driven by, one of the main engine shafts is discussed. When properly rated, the generator can serve as an engine starter as well as a generator of electric power. The electric power conversion equipment and generator controls are conveniently located in the aircraft. Preliminary layouts of generators in a large engine together with their physical sizes and weights indicate that this concept is a technically feasible approach to aircraft secondary power.

  1. Dynamics of a macroscopic model characterizing mutualism of search engines and web sites

    NASA Astrophysics Data System (ADS)

    Wang, Yuanshi; Wu, Hong

    2006-05-01

    We present a model to describe the mutualism relationship between search engines and web sites. In the model, search engines and web sites benefit from each other while the search engines are derived products of the web sites and cannot survive independently. Our goal is to show strategies for the search engines to survive in the internet market. From mathematical analysis of the model, we show that mutualism does not always result in survival. We show various conditions under which the search engines would tend to extinction, persist or grow explosively. Then by the conditions, we deduce a series of strategies for the search engines to survive in the internet market. We present conditions under which the initial number of consumers of the search engines has little contribution to their persistence, which is in agreement with the results in previous works. Furthermore, we show novel conditions under which the initial value plays an important role in the persistence of the search engines and deduce new strategies. We also give suggestions for the web sites to cooperate with the search engines in order to form a win-win situation.

  2. August 17, 2000 ARIES: Fusion Power Core and Power Cycle Engineering/ARR 1

    E-print Network

    Raffray, A. René

    with liquid metal blanket through use of IHX Conventional Steam Cycle: Steel/Water = 35% ARIES-RS LiAugust 17, 2000 ARIES: Fusion Power Core and Power Cycle Engineering/ARR 1 ARIES: Fusion Power Core and Power Cycle Engineering The ARIES Team Presented by A. René Raffray ARIES Peer Review Meeting University

  3. DYNIQX: A novel meta-search engine for metadata based cross search Jianhan Zhu, Dawei Song, Marc Eisenstadt, Cristi Barladeanu, Stefan Rger

    E-print Network

    Zhu, Jianhan

    Large search engines such as Google have achieved tremendous success in recent years, thanks of metadata in academic search services such as PubMed and Google Scholar etc for fusing search results from efficiently and successfully than three well known search engines respectively. 1. Introduction and motivation

  4. 22. Power plant engine pipingcompressed air piping diagram and sections, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    22. Power plant engine piping-compressed air piping diagram and sections, sheet 81 of 130 - Naval Air Station Fallon, Power Plant, 800 Complex, off Carson Road near intersection of Pasture & Berney Roads, Fallon, Churchill County, NV

  5. 21. POWER ROOM INTERIOR, DETAIL OF CATERPILLAR DIESEL ENGINE DIRECTLY ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    21. POWER ROOM INTERIOR, DETAIL OF CATERPILLAR DIESEL ENGINE DIRECTLY CONNECTED TO GENERAL ELECTRIC 15 KW DC GENERATOR (ON LEFT), 110 VOLTS, 136 AMPS, 1200 RPM. INSTALLED 1942. - Death Valley Ranch, Power House, Death Valley Junction, Inyo County, CA

  6. 23. POWER ROOM INTERIOR, DETAIL OF FAIRBANKSMORSE DIESEL ENGINE, DIRECTLY ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    23. POWER ROOM INTERIOR, DETAIL OF FAIRBANKS-MORSE DIESEL ENGINE, DIRECTLY CONNECTED TO FAIRBANKS-MORSE 30 KW DC GENERATOR, 125 VOLTS, 240 AMPS, 800 RPM. INSTALLED 1930. - Death Valley Ranch, Power House, Death Valley Junction, Inyo County, CA

  7. Measurement of acoustic output power in a traveling wave engine.

    PubMed

    Miwa, M; Sumi, T; Biwa, T; Ueda, Y; Yazaki, T

    2006-12-22

    We built and tested a double-loop thermoacoustic cooler consisting of an engine-loop, a branch resonator, and a cooler-loop. The cooling power of 6.4 W was obtained at the cooling temperature of 0 degrees C, when the input heat power of 416 W was supplied to the engine-loop. We measured the acoustic power and found that the output power emitted from the engine-loop was 12 W, and that the input acoustic power entering the cooler-loop was 6 W. PMID:16996552

  8. An ontology-based search engine for protein-protein interactions

    PubMed Central

    2010-01-01

    Background Keyword matching or ID matching is the most common searching method in a large database of protein-protein interactions. They are purely syntactic methods, and retrieve the records in the database that contain a keyword or ID specified in a query. Such syntactic search methods often retrieve too few search results or no results despite many potential matches present in the database. Results We have developed a new method for representing protein-protein interactions and the Gene Ontology (GO) using modified Gödel numbers. This representation is hidden from users but enables a search engine using the representation to efficiently search protein-protein interactions in a biologically meaningful way. Given a query protein with optional search conditions expressed in one or more GO terms, the search engine finds all the interaction partners of the query protein by unique prime factorization of the modified Gödel numbers representing the query protein and the search conditions. Conclusion Representing the biological relations of proteins and their GO annotations by modified Gödel numbers makes a search engine efficiently find all protein-protein interactions by prime factorization of the numbers. Keyword matching or ID matching search methods often miss the interactions involving a protein that has no explicit annotations matching the search condition, but our search engine retrieves such interactions as well if they satisfy the search condition with a more specific term in the ontology. PMID:20122195

  9. Power Systems Engineering Research Center PSERC Background Paper

    E-print Network

    the shortest route from the generator to the load. Instead, electric power flows through the transmission system based on the relative resistance to power flows of each transmission line across the systemPower Systems Engineering Research Center PSERC Background Paper Power System Operations

  10. Power Systems Engineering Research Center PSERC Background Paper

    E-print Network

    Power Systems Engineering Research Center PSERC Background Paper The New Electric Power Business-tuned, economically efficient, and technically-reliable electric power system. The creation of new information and the flow of that information among the various players is at the heart of restructuring. The power

  11. Spacecraft Power Systems Engineering: Solutions for NASA's Manned Space Program

    NASA Technical Reports Server (NTRS)

    Scott, John H.

    2007-01-01

    An overview of spacecraft power systems is presented, with a focus on applications in the manned space program. The topics include: 1) History; 2) State-of-the-art; 3) Development directions; 4) Focus on applications in the manned space program led from JSC; 5) Power Systems Engineering Trade Space; 6) Power Generation and Energy Storage; 7) Power Distribution and Control; and 8) Actuation

  12. PERFORMANCE OF A STIRLING ENGINE POWERED HEAT ACTIVATED HEAT PUMP

    E-print Network

    Oak Ridge National Laboratory

    PERFORMANCE OF A STIRLING ENGINE POWERED HEAT ACTIVATED HEAT PUMP W. D. C. Richards and W. L. Auxer) which employs a natural gas fired Stirling engine to drive a Rankine cycle vapor compressor is presently by the heat pump effect. The Stirling engine/Rankine cycle refrigeration loop heat pump being developed would

  13. PulsedPower Transient Plasma: Energy, Engines, and

    E-print Network

    Levi, Anthony F. J.

    , "Nanosecond Plasma Ignition for Improved Performance of an Internal Combustion Engine," IEEE Trans on Plasma. Gundersen, "Nanosecond Plasma Ignition for Improved Performance of an Internal Combustion Engine," IEEE1Gundersen PulsedPower USC Transient Plasma: Energy, Engines, and Aerospace Applications USC: Dan

  14. Reverse Engineering Java Card Applets Using Power Analysis

    E-print Network

    . We propose sim- ilar methodology for Java Card applets reverse engineering. Because power analysisReverse Engineering Java Card Applets Using Power Analysis Dennis Vermoen1,2 , Marc Witteman2 analysis on smart cards is widely used to obtain infor- mation about implemented cryptographic algorithms

  15. A Music Search Engine Built upon Audiobased and Webbased Similarity Measures

    E-print Network

    Widmer, Gerhard

    ­ tar phrases. Another query could be ``relaxing music'' that should return relaxing pieces regardlessA Music Search Engine Built upon Audio­based and Web­based Similarity Measures Peter Knees 1 , Tim to automatically build a search engine for large­scale music collections that can be queried through natural

  16. A Music Search Engine Built upon Audio-based and Web-based Similarity Measures

    E-print Network

    Widmer, Gerhard

    of energetic gui- tar phrases. Another query could be "relaxing music" that should return relaxing piecesA Music Search Engine Built upon Audio-based and Web-based Similarity Measures Peter Knees1 , Tim to automatically build a search engine for large-scale music collections that can be queried through natural

  17. Classifying and Ranking Search Engine Results as Potential Sources of Plagiarism

    E-print Network

    Giles, C. Lee

    Classifying and Ranking Search Engine Results as Potential Sources of Plagiarism Kyle Williams@ist.psu.edu ABSTRACT Source retrieval for plagiarism detection involves using a search engine to retrieve candidate sources of plagiarism for a given suspicious document so that more accurate com- parisons can be made

  18. Motivation Anstze Menczers Agents Ergebnisse Complementing search engines with online web

    E-print Network

    Morik, Katharina

    Motivation Ansätze Menczers Agents Ergebnisse Complementing search engines with online web mining Internet" Sebastian Land Complementing search engines with online web mining agents #12;Motivation Ansätze Menczers Agents Ergebnisse Outline 1 Motivation Eine kleine Geschichte des Information Retrieval 2 Ansätze

  19. Security-enhanced Search Engine Design in Internet of Things Xiaojun Qian

    E-print Network

    Security-enhanced Search Engine Design in Internet of Things Xiaojun Qian (Nanjing Normal -- a security-enhanced search engine for Internet of Things based on El- liptic Curve Cryptography (ECC) security protocol. We also report our preliminary experimental results. Key Words: Internet of Things

  20. Structural Web Search Engine Arash Rakhshan and Lawrence B. Holder and Diane J. Cook

    E-print Network

    Holder, Lawrence B.

    methods to find a large number of potentially relevant pages. People are likely to surf the web using itsStructural Web Search Engine Arash Rakhshan and Lawrence B. Holder and Diane J. Cook University-mail: {rakhshan, holder, cook}@cse.uta.edu Abstract We present a new approach in web search engines. The web

  1. FUSION METHODS BASED ON COMMON ORDER INVARIABILITY FOR META SEARCH ENGINE SYSTEMS

    E-print Network

    Zhang, Minjie

    FUSION METHODS BASED ON COMMON ORDER INVARIABILITY FOR META SEARCH ENGINE SYSTEMS Xiaohua Yang Hui@ctit.zhnut.edu.cn hy92,minjie@uow.edu.au Abstract: Fusion is an important work for running meta search engine systems. A fusion algorithm is rational iff it can satisfy three conditions, i.e. the associativity, commutativity

  2. Index Compression and Efficient Query Processing in Large Web Search Engines

    ERIC Educational Resources Information Center

    Ding, Shuai

    2013-01-01

    The inverted index is the main data structure used by all the major search engines. Search engines build an inverted index on their collection to speed up query processing. As the size of the web grows, the length of the inverted list structures, which can easily grow to hundreds of MBs or even GBs for common terms (roughly linear in the size of…

  3. Applicability of advanced automotive heat engines to solar thermal power

    NASA Technical Reports Server (NTRS)

    Beremand, D. G.; Evans, D. G.; Alger, D. L.

    1981-01-01

    The requirements of a solar thermal power system are reviewed and compared with the predicted characteristics of automobile engines under development. A good match is found in terms of power level and efficiency when the automobile engines, designed for maximum powers of 65-100 kW (87 to 133 hp) are operated to the nominal 20-40 kW electric output requirement of the solar thermal application. At these reduced power levels it appears that the automotive gas turbine and Stirling engines have the potential to deliver the 40+ percent efficiency goal of the solar thermal program.

  4. Improving Free-Piston Stirling Engine Specific Power

    NASA Technical Reports Server (NTRS)

    Briggs, Maxwell Henry

    2014-01-01

    This work uses analytical methods to demonstrate the potential benefits of optimizing piston and/or displacer motion in a Stirling Engine. Isothermal analysis was used to show the potential benefits of ideal motion in ideal Stirling engines. Nodal analysis is used to show that ideal piston and displacer waveforms are not optimal in real Stirling engines. Constrained optimization was used to identify piston and displacer waveforms that increase Stirling engine specific power.

  5. Improving Free-Piston Stirling Engine Specific Power

    NASA Technical Reports Server (NTRS)

    Briggs, Maxwell H.

    2015-01-01

    This work uses analytical methods to demonstrate the potential benefits of optimizing piston and/or displacer motion in a Stirling engine. Isothermal analysis was used to show the potential benefits of ideal motion in ideal Stirling engines. Nodal analysis is used to show that ideal piston and displacer waveforms are not optimal in real Stirling engines. Constrained optimization was used to identify piston and displacer waveforms that increase Stirling engine specific power.

  6. A unified architecture for biomedical search engines based on semantic web technologies.

    PubMed

    Jalali, Vahid; Matash Borujerdi, Mohammad Reza

    2011-04-01

    There is a huge growth in the volume of published biomedical research in recent years. Many medical search engines are designed and developed to address the over growing information needs of biomedical experts and curators. Significant progress has been made in utilizing the knowledge embedded in medical ontologies and controlled vocabularies to assist these engines. However, the lack of common architecture for utilized ontologies and overall retrieval process, hampers evaluating different search engines and interoperability between them under unified conditions. In this paper, a unified architecture for medical search engines is introduced. Proposed model contains standard schemas declared in semantic web languages for ontologies and documents used by search engines. Unified models for annotation and retrieval processes are other parts of introduced architecture. A sample search engine is also designed and implemented based on the proposed architecture in this paper. The search engine is evaluated using two test collections and results are reported in terms of precision vs. recall and mean average precision for different approaches used by this search engine. PMID:20703566

  7. 40 CFR 91.115 - Certification procedure-determining engine power and engine families.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 20 2010-07-01 2010-07-01 false Certification procedure-determining engine power and engine families. 91.115 Section 91.115 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM MARINE SPARK-IGNITION ENGINES Emission Standards and...

  8. 40 CFR 91.115 - Certification procedure-determining engine power and engine families.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 21 2012-07-01 2012-07-01 false Certification procedure-determining engine power and engine families. 91.115 Section 91.115 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM MARINE SPARK-IGNITION ENGINES Emission Standards and...

  9. The Extreme Searcher's Guide to Web Search Engines: A Handbook for the Serious Searcher. 2nd Edition.

    ERIC Educational Resources Information Center

    Hock, Randolph

    This book aims to facilitate more effective and efficient use of World Wide Web search engines by helping the reader: know the basic structure of the major search engines; become acquainted with those attributes (features, benefits, options, content, etc.) that search engines have in common and where they differ; know the main strengths and…

  10. 14 CFR 121.179 - Airplanes: Reciprocating engine-powered: En route limitations: All engines operating.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 3 2012-01-01 2012-01-01 false Airplanes: Reciprocating engine-powered: En...: CERTIFICATION AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.179 Airplanes: Reciprocating engine-powered: En route limitations:...

  11. 14 CFR 121.193 - Airplanes: Turbine engine powered: En route limitations: Two engines inoperative.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Airplanes: Turbine engine powered: En route...: CERTIFICATION AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.193 Airplanes: Turbine engine powered: En route limitations:...

  12. 14 CFR 121.179 - Airplanes: Reciprocating engine-powered: En route limitations: All engines operating.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 3 2011-01-01 2011-01-01 false Airplanes: Reciprocating engine-powered: En...: CERTIFICATION AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.179 Airplanes: Reciprocating engine-powered: En route limitations:...

  13. 14 CFR 121.191 - Airplanes: Turbine engine powered: En route limitations: One engine inoperative.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 3 2014-01-01 2014-01-01 false Airplanes: Turbine engine powered: En route...: CERTIFICATION AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.191 Airplanes: Turbine engine powered: En route limitations:...

  14. 14 CFR 121.191 - Airplanes: Turbine engine powered: En route limitations: One engine inoperative.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 3 2012-01-01 2012-01-01 false Airplanes: Turbine engine powered: En route...: CERTIFICATION AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.191 Airplanes: Turbine engine powered: En route limitations:...

  15. 14 CFR 121.179 - Airplanes: Reciprocating engine-powered: En route limitations: All engines operating.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Airplanes: Reciprocating engine-powered: En...: CERTIFICATION AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.179 Airplanes: Reciprocating engine-powered: En route limitations:...

  16. 14 CFR 121.193 - Airplanes: Turbine engine powered: En route limitations: Two engines inoperative.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 3 2013-01-01 2013-01-01 false Airplanes: Turbine engine powered: En route...: CERTIFICATION AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.193 Airplanes: Turbine engine powered: En route limitations:...

  17. 14 CFR 121.191 - Airplanes: Turbine engine powered: En route limitations: One engine inoperative.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 3 2011-01-01 2011-01-01 false Airplanes: Turbine engine powered: En route...: CERTIFICATION AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.191 Airplanes: Turbine engine powered: En route limitations:...

  18. 14 CFR 121.193 - Airplanes: Turbine engine powered: En route limitations: Two engines inoperative.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 3 2011-01-01 2011-01-01 false Airplanes: Turbine engine powered: En route...: CERTIFICATION AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.193 Airplanes: Turbine engine powered: En route limitations:...

  19. 14 CFR 121.191 - Airplanes: Turbine engine powered: En route limitations: One engine inoperative.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 3 2013-01-01 2013-01-01 false Airplanes: Turbine engine powered: En route...: CERTIFICATION AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.191 Airplanes: Turbine engine powered: En route limitations:...

  20. 14 CFR 121.179 - Airplanes: Reciprocating engine-powered: En route limitations: All engines operating.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 3 2013-01-01 2013-01-01 false Airplanes: Reciprocating engine-powered: En...: CERTIFICATION AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.179 Airplanes: Reciprocating engine-powered: En route limitations:...

  1. 14 CFR 121.191 - Airplanes: Turbine engine powered: En route limitations: One engine inoperative.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Airplanes: Turbine engine powered: En route...: CERTIFICATION AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.191 Airplanes: Turbine engine powered: En route limitations:...

  2. 14 CFR 121.193 - Airplanes: Turbine engine powered: En route limitations: Two engines inoperative.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 3 2012-01-01 2012-01-01 false Airplanes: Turbine engine powered: En route...: CERTIFICATION AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.193 Airplanes: Turbine engine powered: En route limitations:...

  3. 14 CFR 121.193 - Airplanes: Turbine engine powered: En route limitations: Two engines inoperative.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 3 2014-01-01 2014-01-01 false Airplanes: Turbine engine powered: En route...: CERTIFICATION AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.193 Airplanes: Turbine engine powered: En route limitations:...

  4. 14 CFR 121.179 - Airplanes: Reciprocating engine-powered: En route limitations: All engines operating.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 3 2014-01-01 2014-01-01 false Airplanes: Reciprocating engine-powered: En...: CERTIFICATION AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.179 Airplanes: Reciprocating engine-powered: En route limitations:...

  5. 49 CFR 176.905 - Motor vehicles or mechanical equipment powered by internal combustion engines.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...mechanical equipment powered by internal combustion engines. 176.905 Section...mechanical equipment powered by internal combustion engines. (a) A motor vehicle...equipment powered by an internal combustion engine is subject to the...

  6. 40 CFR 1051.140 - What is my vehicle's maximum engine power and displacement?

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...vehicle's maximum engine power and displacement? 1051.140 Section 1051.140...vehicle's maximum engine power and displacement? This section describes how to...vehicle's maximum engine power and displacement for the purposes of this...

  7. 14 CFR 135.385 - Large transport category airplanes: Turbine engine powered: Landing limitations: Destination...

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... Large transport category airplanes: Turbine engine powered: Landing limitations... Large transport category airplanes: Turbine engine powered: Landing limitations...airports. (a) No person operating a turbine engine powered large transport...

  8. 14 CFR 121.195 - Airplanes: Turbine engine powered: Landing limitations: Destination airports.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 2013-01-01 false Airplanes: Turbine engine powered: Landing limitations...Limitations § 121.195 Airplanes: Turbine engine powered: Landing limitations...airports. (a) No person operating a turbine engine powered airplane may...

  9. 14 CFR 135.379 - Large transport category airplanes: Turbine engine powered: Takeoff limitations.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...Large transport category airplanes: Turbine engine powered: Takeoff limitations...Large transport category airplanes: Turbine engine powered: Takeoff limitations. (a) No person operating a turbine engine powered large transport...

  10. 14 CFR 135.387 - Large transport category airplanes: Turbine engine powered: Landing limitations: Alternate airports.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... Large transport category airplanes: Turbine engine powered: Landing limitations... Large transport category airplanes: Turbine engine powered: Landing limitations...airport as an alternate airport for a turbine engine powered large transport...

  11. 14 CFR 121.195 - Airplanes: Turbine engine powered: Landing limitations: Destination airports.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 2010-01-01 false Airplanes: Turbine engine powered: Landing limitations...Limitations § 121.195 Airplanes: Turbine engine powered: Landing limitations...airports. (a) No person operating a turbine engine powered airplane may...

  12. 14 CFR 135.387 - Large transport category airplanes: Turbine engine powered: Landing limitations: Alternate airports.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... Large transport category airplanes: Turbine engine powered: Landing limitations... Large transport category airplanes: Turbine engine powered: Landing limitations...airport as an alternate airport for a turbine engine powered large transport...

  13. 14 CFR 135.387 - Large transport category airplanes: Turbine engine powered: Landing limitations: Alternate airports.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... Large transport category airplanes: Turbine engine powered: Landing limitations... Large transport category airplanes: Turbine engine powered: Landing limitations...airport as an alternate airport for a turbine engine powered large transport...

  14. 14 CFR 121.329 - Supplemental oxygen for sustenance: Turbine engine powered airplanes.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... Supplemental oxygen for sustenance: Turbine engine powered airplanes. 121.329... Supplemental oxygen for sustenance: Turbine engine powered airplanes. (a) General. When operating a turbine engine powered airplane, each...

  15. 14 CFR 135.387 - Large transport category airplanes: Turbine engine powered: Landing limitations: Alternate airports.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... Large transport category airplanes: Turbine engine powered: Landing limitations... Large transport category airplanes: Turbine engine powered: Landing limitations...airport as an alternate airport for a turbine engine powered large transport...

  16. 14 CFR 91.1037 - Large transport category airplanes: Turbine engine powered; Limitations; Destination and...

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... Large transport category airplanes: Turbine engine powered; Limitations; Destination... Large transport category airplanes: Turbine engine powered; Limitations; Destination...manager or any other person may permit a turbine engine powered large transport...

  17. 14 CFR 135.379 - Large transport category airplanes: Turbine engine powered: Takeoff limitations.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...Large transport category airplanes: Turbine engine powered: Takeoff limitations...Large transport category airplanes: Turbine engine powered: Takeoff limitations. (a) No person operating a turbine engine powered large transport...

  18. 14 CFR 135.385 - Large transport category airplanes: Turbine engine powered: Landing limitations: Destination...

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... Large transport category airplanes: Turbine engine powered: Landing limitations... Large transport category airplanes: Turbine engine powered: Landing limitations...airports. (a) No person operating a turbine engine powered large transport...

  19. 14 CFR 121.189 - Airplanes: Turbine engine powered: Takeoff limitations.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...2012-01-01 false Airplanes: Turbine engine powered: Takeoff limitations...Limitations § 121.189 Airplanes: Turbine engine powered: Takeoff limitations. (a) No person operating a turbine engine powered airplane may...

  20. 14 CFR 121.197 - Airplanes: Turbine engine powered: Landing limitations: Alternate airports.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 2011-01-01 false Airplanes: Turbine engine powered: Landing limitations...Limitations § 121.197 Airplanes: Turbine engine powered: Landing limitations...in a dispatch or flight release for a turbine engine powered airplane...

  1. 14 CFR 91.1037 - Large transport category airplanes: Turbine engine powered; Limitations; Destination and...

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... Large transport category airplanes: Turbine engine powered; Limitations; Destination... Large transport category airplanes: Turbine engine powered; Limitations; Destination...manager or any other person may permit a turbine engine powered large transport...

  2. 14 CFR 121.195 - Airplanes: Turbine engine powered: Landing limitations: Destination airports.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 2011-01-01 false Airplanes: Turbine engine powered: Landing limitations...Limitations § 121.195 Airplanes: Turbine engine powered: Landing limitations...airports. (a) No person operating a turbine engine powered airplane may...

  3. 14 CFR 135.387 - Large transport category airplanes: Turbine engine powered: Landing limitations: Alternate airports.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... Large transport category airplanes: Turbine engine powered: Landing limitations... Large transport category airplanes: Turbine engine powered: Landing limitations...airport as an alternate airport for a turbine engine powered large transport...

  4. 14 CFR 91.1037 - Large transport category airplanes: Turbine engine powered; Limitations; Destination and...

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... Large transport category airplanes: Turbine engine powered; Limitations; Destination... Large transport category airplanes: Turbine engine powered; Limitations; Destination...manager or any other person may permit a turbine engine powered large transport...

  5. 14 CFR 121.195 - Airplanes: Turbine engine powered: Landing limitations: Destination airports.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 2014-01-01 false Airplanes: Turbine engine powered: Landing limitations...Limitations § 121.195 Airplanes: Turbine engine powered: Landing limitations...airports. (a) No person operating a turbine engine powered airplane may...

  6. 14 CFR 135.385 - Large transport category airplanes: Turbine engine powered: Landing limitations: Destination...

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... Large transport category airplanes: Turbine engine powered: Landing limitations... Large transport category airplanes: Turbine engine powered: Landing limitations...airports. (a) No person operating a turbine engine powered large transport...

  7. 14 CFR 121.197 - Airplanes: Turbine engine powered: Landing limitations: Alternate airports.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 2010-01-01 false Airplanes: Turbine engine powered: Landing limitations...Limitations § 121.197 Airplanes: Turbine engine powered: Landing limitations...in a dispatch or flight release for a turbine engine powered airplane...

  8. 14 CFR 121.195 - Airplanes: Turbine engine powered: Landing limitations: Destination airports.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 2012-01-01 false Airplanes: Turbine engine powered: Landing limitations...Limitations § 121.195 Airplanes: Turbine engine powered: Landing limitations...airports. (a) No person operating a turbine engine powered airplane may...

  9. 14 CFR 121.197 - Airplanes: Turbine engine powered: Landing limitations: Alternate airports.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 2014-01-01 false Airplanes: Turbine engine powered: Landing limitations...Limitations § 121.197 Airplanes: Turbine engine powered: Landing limitations...in a dispatch or flight release for a turbine engine powered airplane...

  10. 14 CFR 121.197 - Airplanes: Turbine engine powered: Landing limitations: Alternate airports.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 2012-01-01 false Airplanes: Turbine engine powered: Landing limitations...Limitations § 121.197 Airplanes: Turbine engine powered: Landing limitations...in a dispatch or flight release for a turbine engine powered airplane...

  11. 14 CFR 135.385 - Large transport category airplanes: Turbine engine powered: Landing limitations: Destination...

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... Large transport category airplanes: Turbine engine powered: Landing limitations... Large transport category airplanes: Turbine engine powered: Landing limitations...airports. (a) No person operating a turbine engine powered large transport...

  12. 14 CFR 91.1037 - Large transport category airplanes: Turbine engine powered; Limitations; Destination and...

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... Large transport category airplanes: Turbine engine powered; Limitations; Destination... Large transport category airplanes: Turbine engine powered; Limitations; Destination...manager or any other person may permit a turbine engine powered large transport...

  13. 14 CFR 121.189 - Airplanes: Turbine engine powered: Takeoff limitations.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...2010-01-01 false Airplanes: Turbine engine powered: Takeoff limitations...Limitations § 121.189 Airplanes: Turbine engine powered: Takeoff limitations. (a) No person operating a turbine engine powered airplane may...

  14. 14 CFR 121.329 - Supplemental oxygen for sustenance: Turbine engine powered airplanes.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... Supplemental oxygen for sustenance: Turbine engine powered airplanes. 121.329... Supplemental oxygen for sustenance: Turbine engine powered airplanes. (a) General. When operating a turbine engine powered airplane, each...

  15. 14 CFR 135.385 - Large transport category airplanes: Turbine engine powered: Landing limitations: Destination...

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... Large transport category airplanes: Turbine engine powered: Landing limitations... Large transport category airplanes: Turbine engine powered: Landing limitations...airports. (a) No person operating a turbine engine powered large transport...

  16. 14 CFR 121.189 - Airplanes: Turbine engine powered: Takeoff limitations.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...2014-01-01 false Airplanes: Turbine engine powered: Takeoff limitations...Limitations § 121.189 Airplanes: Turbine engine powered: Takeoff limitations. (a) No person operating a turbine engine powered airplane may...

  17. 14 CFR 135.379 - Large transport category airplanes: Turbine engine powered: Takeoff limitations.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ...Large transport category airplanes: Turbine engine powered: Takeoff limitations...Large transport category airplanes: Turbine engine powered: Takeoff limitations. (a) No person operating a turbine engine powered large transport...

  18. 14 CFR 121.189 - Airplanes: Turbine engine powered: Takeoff limitations.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...2011-01-01 false Airplanes: Turbine engine powered: Takeoff limitations...Limitations § 121.189 Airplanes: Turbine engine powered: Takeoff limitations. (a) No person operating a turbine engine powered airplane may...

  19. 14 CFR 91.1037 - Large transport category airplanes: Turbine engine powered; Limitations; Destination and...

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... Large transport category airplanes: Turbine engine powered; Limitations; Destination... Large transport category airplanes: Turbine engine powered; Limitations; Destination...manager or any other person may permit a turbine engine powered large transport...

  20. 14 CFR 121.197 - Airplanes: Turbine engine powered: Landing limitations: Alternate airports.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 2013-01-01 false Airplanes: Turbine engine powered: Landing limitations...Limitations § 121.197 Airplanes: Turbine engine powered: Landing limitations...in a dispatch or flight release for a turbine engine powered airplane...

  1. 14 CFR 121.189 - Airplanes: Turbine engine powered: Takeoff limitations.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ...2013-01-01 false Airplanes: Turbine engine powered: Takeoff limitations...Limitations § 121.189 Airplanes: Turbine engine powered: Takeoff limitations. (a) No person operating a turbine engine powered airplane may...

  2. 14 CFR 121.329 - Supplemental oxygen for sustenance: Turbine engine powered airplanes.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... Supplemental oxygen for sustenance: Turbine engine powered airplanes. 121.329... Supplemental oxygen for sustenance: Turbine engine powered airplanes. (a) General. When operating a turbine engine powered airplane, each...

  3. 14 CFR 121.329 - Supplemental oxygen for sustenance: Turbine engine powered airplanes.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... Supplemental oxygen for sustenance: Turbine engine powered airplanes. 121.329... Supplemental oxygen for sustenance: Turbine engine powered airplanes. (a) General. When operating a turbine engine powered airplane, each...

  4. 14 CFR 121.329 - Supplemental oxygen for sustenance: Turbine engine powered airplanes.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... Supplemental oxygen for sustenance: Turbine engine powered airplanes. 121.329... Supplemental oxygen for sustenance: Turbine engine powered airplanes. (a) General. When operating a turbine engine powered airplane, each...

  5. 14 CFR 135.379 - Large transport category airplanes: Turbine engine powered: Takeoff limitations.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...Large transport category airplanes: Turbine engine powered: Takeoff limitations...Large transport category airplanes: Turbine engine powered: Takeoff limitations. (a) No person operating a turbine engine powered large transport...

  6. 14 CFR 135.379 - Large transport category airplanes: Turbine engine powered: Takeoff limitations.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...Large transport category airplanes: Turbine engine powered: Takeoff limitations...Large transport category airplanes: Turbine engine powered: Takeoff limitations. (a) No person operating a turbine engine powered large transport...

  7. Lessons learned from building the iMED intelligent medical search engine.

    PubMed

    Luo, Gang

    2009-01-01

    Searching for medical information on the Web has become highly popular, but it remains a challenging task because searchers are often uncertain about their exact medical situations and unfamiliar with medical terminology. To address this challenge, we have built an intelligent medical Web search engine called iMed. iMed introduces and extends expert system technology into the search engine domain. It uses medical knowledge and an interactive questionnaire to help searchers form queries. This paper reports the lessons we learned from building the iMed system. We believe that many of these lessons can be applied to other medical search engines as well. We systematically discuss important issues in the new field consumer-centric intelligent medical search, including input interface, output interface, search system, medical knowledge base, help system, and testing. PMID:19965039

  8. Initial Tests of a Thermoacoustic Space Power Engine

    NASA Astrophysics Data System (ADS)

    Backhaus, Scott

    2003-01-01

    Future NASA deep-space missions will require radioisotope-powered electric generators that are just as reliable as current RTGs, but more efficient and of higher specific power (W/kg). Thermoacoustic engines at the ~1-kW scale have converted high-temperature heat into acoustic, or PV, power without moving parts at 30% efficiency. Consisting of only tubes and a few heat exchangers, thermoacoustic engines are low mass and promise to be highly reliable. Coupling a thermoacoustic engine to a low mass, highly reliable and efficient linear alternator will create a heat-driven electric generator suitable for deep-space applications. Conversion efficiency data will be presented on a demonstration thermoacoustic engine designed for the 100-Watt power range.

  9. East Hydraulic Power Supply Unit University of Saskatchewan -Mechanical Engineering Fluid Power and Controls

    E-print Network

    Saskatchewan, University of

    East Hydraulic Power Supply Unit University of Saskatchewan - Mechanical Engineering ­ Fluid Power and Controls ID: FP0004 Rev: 001 Date: May 31, 2010 Page: 1 of 7 East Hydraulic Power Supply and Test Bench. Approved By: Primary Contact: Doug Bitner Rm: 1B15.1 966-5462 Secondary Contact: #12;East Hydraulic Power

  10. HYPower Hydraulic Power Supply Unit University of Saskatchewan -Mechanical Engineering Fluid Power and Controls

    E-print Network

    Saskatchewan, University of

    HYPower Hydraulic Power Supply Unit University of Saskatchewan - Mechanical Engineering ­ Fluid Power and Controls ID: FP0002 Rev: 002 Date: May 31, 2010 Page: 1 of 7 Hydraulic Power Supply (HYPower-5462 Secondary Contact: #12;HYPower Hydraulic Power Supply Unit University of Saskatchewan - Mechanical

  11. Tests Of A Stirling-Engine Power Converter

    NASA Technical Reports Server (NTRS)

    Dochat, George

    1995-01-01

    Report describes acceptance tests of power converter consisting of pair of opposed free-piston Stirling engines driving linear alternators. Stirling engines offer potential for extremely long life, high reliability, high efficiency at low hot-to-cold temperature ratios, and relatively low heater-head temperatures.

  12. Internet Power Searching: The Advanced Manual. 2nd Edition. Neal-Schuman NetGuide Series.

    ERIC Educational Resources Information Center

    Bradley, Phil

    This handbook provides information on how Internet search engines and related software and utilities work and how to use them in order to improve search techniques. The book begins with an introduction to the Internet. Part 1 contains the following chapters that cover mining the Internet for information: "An Introduction to Search

  13. Solar power satellites - Heat engine or solar cells

    NASA Technical Reports Server (NTRS)

    Oman, H.; Gregory, D. L.

    1978-01-01

    A solar power satellite is the energy-converting element of a system that can deliver some 10 GW of power to utilities on the earth's surface. We evaluated heat engines and solar cells for converting sunshine to electric power at the satellite. A potassium Rankine cycle was the best of the heat engines, and 50 microns thick single-crystal silicon cells were the best of the photovoltaic converters. Neither solar cells nor heat engines had a clear advantage when all factors were considered. The potassium-turbine power plant, however, was more difficult to assemble and required a more expensive orbital assembly base. We therefore based our cost analyses on solar-cell energy conversion, concluding that satellite-generated power could be delivered to utilities for around 4 to 5 cents a kWh.

  14. 40 CFR 1042.140 - Maximum engine power, displacement, power density, and maximum in-use engine speed.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... as specified in 40 CFR 1065.610. This is the maximum in-use engine speed used for calculating the NOX... procedures of 40 CFR part 1065, based on the manufacturer's design and production specifications for the..., power density, and maximum in-use engine speed. 1042.140 Section 1042.140 Protection of...

  15. Photocell heat engine solar power systems

    NASA Technical Reports Server (NTRS)

    Taussig, R. T.; Vaidyanathan, T. S.; Hoverson, S.; Bruzzone, C.; Christiansen, W.

    1980-01-01

    A combined photocell heat engine concept is proposed for high efficiency solar energy conversion in space. In this concept the short wavelength portion of the solar spectrum is split by a dichroic filter and sent to a bank of photocells. The long wave-length remainder of the spectrum is used by the heat engine. This technique allows the photocells to operate with the minimum amount of waste heat, increasing their efficiency and reducing the amount of cooling required. The heat engine operates by direct absorption in a working fluid containing broadband absorber molecules or particulates. A window in the heat engine admits the long wave-lengths from the solar spectrum. The window may also reflect a portion of the internal gaseous reradiation spectrum (e.g., a heat mirror) to help reduce radiation losses. Flow-induced thermal gradients may also reduce reradiation losses in the case of optically thick working fluids. The efficiencies computed for the photocell heat engine solar energy converter can be as high as 42 percent.

  16. The History of the Internet Search Engine: Navigational Media and the Traffic Commodity

    NASA Astrophysics Data System (ADS)

    van Couvering, E.

    This chapter traces the economic development of the search engine industry over time, beginning with the earliest Web search engines and ending with the domination of the market by Google, Yahoo! and MSN. Specifically, it focuses on the ways in which search engines are similar to and different from traditional media institutions, and how the relations between traditional and Internet media have changed over time. In addition to its historical overview, a core contribution of this chapter is the analysis of the industry using a media value chain based on audiences rather than on content, and the development of traffic as the core unit of exchange. It shows that traditional media companies failed when they attempted to create vertically integrated portals in the late 1990s, based on the idea of controlling Internet content, while search engines succeeded in creating huge "virtually integrated" networks based on control of Internet traffic rather than Internet content.

  17. Comparing image search behaviour in the ARRS GoldMiner search engine and a clinical PACS/RIS.

    PubMed

    De-Arteaga, Maria; Eggel, Ivan; Do, Bao; Rubin, Daniel; Kahn, Charles E; Müller, Henning

    2015-08-01

    Information search has changed the way we manage knowledge and the ubiquity of information access has made search a frequent activity, whether via Internet search engines or increasingly via mobile devices. Medical information search is in this respect no different and much research has been devoted to analyzing the way in which physicians aim to access information. Medical image search is a much smaller domain but has gained much attention as it has different characteristics than search for text documents. While web search log files have been analysed many times to better understand user behaviour, the log files of hospital internal systems for search in a PACS/RIS (Picture Archival and Communication System, Radiology Information System) have rarely been analysed. Such a comparison between a hospital PACS/RIS search and a web system for searching images of the biomedical literature is the goal of this paper. Objectives are to identify similarities and differences in search behaviour of the two systems, which could then be used to optimize existing systems and build new search engines. Log files of the ARRS GoldMiner medical image search engine (freely accessible on the Internet) containing 222,005 queries, and log files of Stanford's internal PACS/RIS search called radTF containing 18,068 queries were analysed. Each query was preprocessed and all query terms were mapped to the RadLex (Radiology Lexicon) terminology, a comprehensive lexicon of radiology terms created and maintained by the Radiological Society of North America, so the semantic content in the queries and the links between terms could be analysed, and synonyms for the same concept could be detected. RadLex was mainly created for the use in radiology reports, to aid structured reporting and the preparation of educational material (Lanlotz, 2006) [1]. In standard medical vocabularies such as MeSH (Medical Subject Headings) and UMLS (Unified Medical Language System) specific terms of radiology are often underrepresented, therefore RadLex was considered to be the best option for this task. The results show a surprising similarity between the usage behaviour in the two systems, but several subtle differences can also be noted. The average number of terms per query is 2.21 for GoldMiner and 2.07 for radTF, the used axes of RadLex (anatomy, pathology, findings, …) have almost the same distribution with clinical findings being the most frequent and the anatomical entity the second; also, combinations of RadLex axes are extremely similar between the two systems. Differences include a longer length of the sessions in radTF than in GoldMiner (3.4 and 1.9 queries per session on average). Several frequent search terms overlap but some strong differences exist in the details. In radTF the term "normal" is frequent, whereas in GoldMiner it is not. This makes intuitive sense, as in the literature normal cases are rarely described whereas in clinical work the comparison with normal cases is often a first step. The general similarity in many points is likely due to the fact that users of the two systems are influenced by their daily behaviour in using standard web search engines and follow this behaviour in their professional search. This means that many results and insights gained from standard web search can likely be transferred to more specialized search systems. Still, specialized log files can be used to find out more on reformulations and detailed strategies of users to find the right content. PMID:26002820

  18. Satellite nuclear power station: An engineering analysis

    NASA Technical Reports Server (NTRS)

    Williams, J. R.; Clement, J. D.; Rosa, R. J.; Kirby, K. D.; Yang, Y. Y.

    1973-01-01

    A nuclear-MHD power plant system which uses a compact non-breeder reactor to produce power in the multimegawatt range is analyzed. It is shown that, operated in synchronous orbit, the plant would transmit power safely to the ground by a microwave beam. Fuel reprocessing would take place in space, and no radioactive material would be returned to earth. Even the effect of a disastrous accident would have negligible effect on earth. A hydrogen moderated gas core reactor, or a colloid-core, or NERVA type reactor could also be used. The system is shown to approach closely the ideal of economical power without pollution.

  19. Power Systems Engineering Research Center PSERC Background Paper

    E-print Network

    Power Systems Engineering Research Center PSERC Background Paper Analyzing Blackout Events of the disturbance event that were made available in the Bonneville Power #12;2 Administration (BPA) control area. There were three teams mainly in the simulation: 1) BPA, Portland, WA, 2) Powertech Labs, Vancouver, BC

  20. Power System Analysis Department of Electrical and Computer Engineering

    E-print Network

    Saskatchewan, University of

    EE 860.3 Power System Analysis Department of Electrical and Computer Engineering Fall 2013-14 Description: This course covers in depth main topics: 1-Analysis of faulted power systems which includes bus networks; balanced and unbalanced faults, 2- Load flow studies; the static load flow equations

  1. 12. Detail of clutch and backup gasoline engine for powering ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    12. Detail of clutch and backup gasoline engine for powering Stoney gates. Clutch mechanism manufactured by Baldridge Machine Company, Detroit, Michigan, ca. 1910. Instrument to the left records volume of flow through headworks. View looking south towards Stoney gates. Photo by Jet Lowe, HAER, 1989. - Puget Sound Power & Light Company, White River Hydroelectric Project, 600 North River Avenue, Dieringer, Pierce County, WA

  2. Development and tuning of an original search engine for patent libraries in medicinal chemistry

    PubMed Central

    2014-01-01

    Background The large increase in the size of patent collections has led to the need of efficient search strategies. But the development of advanced text-mining applications dedicated to patents of the biomedical field remains rare, in particular to address the needs of the pharmaceutical & biotech industry, which intensively uses patent libraries for competitive intelligence and drug development. Methods We describe here the development of an advanced retrieval engine to search information in patent collections in the field of medicinal chemistry. We investigate and combine different strategies and evaluate their respective impact on the performance of the search engine applied to various search tasks, which covers the putatively most frequent search behaviours of intellectual property officers in medical chemistry: 1) a prior art search task; 2) a technical survey task; and 3) a variant of the technical survey task, sometimes called known-item search task, where a single patent is targeted. Results The optimal tuning of our engine resulted in a top-precision of 6.76% for the prior art search task, 23.28% for the technical survey task and 46.02% for the variant of the technical survey task. We observed that co-citation boosting was an appropriate strategy to improve prior art search tasks, while IPC classification of queries was improving retrieval effectiveness for technical survey tasks. Surprisingly, the use of the full body of the patent was always detrimental for search effectiveness. It was also observed that normalizing biomedical entities using curated dictionaries had simply no impact on the search tasks we evaluate. The search engine was finally implemented as a web-application within Novartis Pharma. The application is briefly described in the report. Conclusions We have presented the development of a search engine dedicated to patent search, based on state of the art methods applied to patent corpora. We have shown that a proper tuning of the system to adapt to the various search tasks clearly increases the effectiveness of the system. We conclude that different search tasks demand different information retrieval engines' settings in order to yield optimal end-user retrieval. PMID:24564220

  3. Design and Evaluation of a University-wide Expert Search Engine

    E-print Network

    Bogers, Toine

    a university-wide expert search engine. We performed system-based evaluation to determine the op- timal significantly outperformed the old search system in terms of effectiveness, efficiency, and user satisfaction- spond to new market opportunities or threats [1]. So far, most of the existing expert finding systems

  4. 3D-Model Search Engine from Photos Tarik Filali Ansary

    E-print Network

    Vandeborre, Jean-Philippe

    3D-Model Search Engine from Photos Tarik Filali Ansary LIFL UMR CNRS/USTL 8022 Univ. Lille 1 Univ. Lille 1 ­ France daoudi@lifl.fr ABSTRACT In this paper, we present the FOX-MIIRE 3D-Model Search uses statisti- cal model distribution scores to select the optimal number of views to characterise a 3D

  5. A Nearly Four-Year Longitudinal Study of Search-Engine Poisoning

    E-print Network

    Thornton, Mitchell

    who lack access to traditional search-based advertisements. We overcome several obstacles to longitudinal studies by amalga- mating different resources and adapting our measurement infras- tructure by search engines and browsers to combat their effectiveness. We also study the efforts of hosts to remedy

  6. Which Vertical Search Engines are Relevant? Understanding Vertical Relevance Assessments for Web Queries

    E-print Network

    Lalmas, Mounia

    , such as news, image and video, into a single interface is a popular paradigm in web search. Current approaches types of online media (e.g. images, news, video), it is becoming popular for web search engines, for example, adding image results to the ten blue links for the query "yoga poses". Retrieving and integrating

  7. Inefficiency and Bias of Search Engines in Retrieving References Containing Scientific Names of Fossil Amphibians

    ERIC Educational Resources Information Center

    Brown, Lauren E.; Dubois, Alain; Shepard, Donald B.

    2008-01-01

    Retrieval efficiencies of paper-based references in journals and other serials containing 10 scientific names of fossil amphibians were determined for seven major search engines. Retrievals were compared to the number of references obtained covering the period 1895-2006 by a Comprehensive Search. The latter was primarily a traditional…

  8. Impact of Internet Search Engines on OPAC Users: A Study of Punjabi University, Patiala (India)

    ERIC Educational Resources Information Center

    Kumar, Shiv

    2012-01-01

    Purpose: The aim of this paper is to study the impact of internet search engine usage with special reference to OPAC searches in the Punjabi University Library, Patiala, Punjab (India). Design/methodology/approach: The primary data were collected from 352 users comprising faculty, research scholars and postgraduate students of the university. A…

  9. Transporting submarine engines to power the PRT

    NASA Technical Reports Server (NTRS)

    1926-01-01

    Inside the test section of the PRT. Laid out on the floor are the myriad parts needed for the final assembly of the diesel engines. In the back right corner are scales that would be used in the tunnel's balance. The dolly near the door under the entrance cone is for an oxy-acetelyne welding apparatus.

  10. Children's Use of the Yahooligans! Web Search Engine. III. Cognitive and Physical Behaviors on Fully Self-Generated Search Tasks.

    ERIC Educational Resources Information Center

    Bilal, Dania

    2002-01-01

    Presents the third part of a research project that investigated information-seeking behavior and success of seventh-grade science children in using the Yahooligans! Web search engine/directory. Children were more successful on a fully self-generated task than one two fully assigned tasks and were more successful when they browsed than when they…

  11. Power recovery from turbine and gas engine exhausts

    SciTech Connect

    Lawson, G.L.

    1985-02-01

    Due to the energy consciousness of the United States and to the ever increasing cost of engine fuels, power recovery from turbine and gas engine exhausts has come of age. The addition of waste recovery systems to these exhausts increases the thermal efficiencies of typical systems from the range of 21% to 39% up to the range of 28% to 49%. The new ''expander'' type power recovery system includes a waste heat recovery exchanger which will transfer heat from the engine exhaust into any of numerous thermal fluids. The recovered heat energy now in the thermal fluid medium can, in turn, be used to produce power for any desired application (i.e. gas compression, process refrigeration, electrical power generation, etc.). The particular systems put forth in this paper concentrate on the use of expansion fluids (other than steam) driving ''expanders'' as motive devices.

  12. 1994 IEEE Power Engineering Society transmission and distribution conference: Proceedings

    SciTech Connect

    1994-12-31

    This is a collection of papers presented at the 1994 IEEE PES Transmission and Distribution Conference. The topics of the papers include distribution system voltage sags; switchgear; power systems engineering; extruded dielectric distribution cables and accessories; power system harmonics and compensation schemes on transmission lines; extruded dielectric transmission cables and accessories; automation of distribution systems; power system relaying session; installation of underground cables; power systems instrumentation and measurement; substations; test and measurements; surge protection devices; HVDC and flexible AC transmission systems; high voltage power cables; transmissions systems -- fields and equipment; tower, poles, and conductors; and transformers.

  13. Solar powered outer space helium heat engine

    SciTech Connect

    Spielberg, J.I.

    1985-01-01

    A thermodynamic heat engine, using the low Kelvin temperatures of space as its cold temperature reservoir, could operate at Carnot efficiencies of greater than 60 percent. Selective solar coatings with high solar absorptivity and low thermal emissivity could be the heat intake for a solar panel high temperature heat reservoir, with the high vacuum of space providing insulation from thermal conduction and convection heat losses. Helium or nitrogen is a possible working substance for a closed cycle engine, such as an efficient steam turbine, that works over temperature extremes from a near absolute zero to conventional boiler temperatures. Energy conversion efficiencies should be much higher than with currently available direct conversion devices. 18 references.

  14. GeoDiscover a specialized search engine to discover geospatial data in the Web

    E-print Network

    Camara, Gilberto

    GeoDiscover ­ a specialized search engine to discover geospatial data in the Web Fernando Renier recovering specialized contents. Geospatial data are created by local governments, companies and people engine to access and recover geospatial data in the Web, focusing on its main characteristics

  15. A Search for Optimal Wing Strokes in Flapping Flight: Can Engineers Improve Upon Nature?

    E-print Network

    Mittal, Rajat

    A Search for Optimal Wing Strokes in Flapping Flight: Can Engineers Improve Upon Nature? Lingxiao of factors including anatomy, developmental requirements, biological material properties and evolutionary) of the insect wing by over 30%. This study reinforces the notion that while engineers can learn from Nature

  16. Combinatorial search strategies for the metabolic engineering of microorganisms

    E-print Network

    Santos, Christine Nicole S. (Christine Nicole San Diego)

    2010-01-01

    Although the field of microbial metabolic engineering has traditionally been dominated by rational and knowledge-driven approaches, recent advances in genetic engineering have led to the emergence of a new methodology based ...

  17. The Perfect Search Engine Is Not Enough: A Study of Orienteering Behavior in Directed Search

    E-print Network

    that investigated how people performed personally motivated searches in their email, in their files, and on the Web people currently have with search tools. However, even when a person knows exactly what they are looking to build the best possible search tool, we conducted an observational study of people performing personally

  18. When Every Search Engine Knows Your Name. Online Treasures

    ERIC Educational Resources Information Center

    Balas, Janet L.

    2005-01-01

    This article explores personalized search technologies showing that various vendors are trying a variety of approaches. Brief descriptions are given of some of beta projects in effort to assist librarians seeking to offer services that meet their patrons' individual needs by exploring how personal search technologies are being used on the Web in…

  19. Context-aware Querying for Multimodal Search Engines

    E-print Network

    Cortes, Corinna

    location or temperature. We introduce the concepts of MuSe- Bag for multimodal query interfaces, UIIFace-SEARCH multimodal user interface, which we evaluate via a user study. Keywords: Multimodality, Context Awareness, User Interfaces 1 Introduction The I-SEARCH project aims to provide a unified framework for multimodal

  20. Quantum optomechanical piston engines powered by heat

    NASA Astrophysics Data System (ADS)

    Mari, A.; Farace, A.; Giovannetti, V.

    2015-09-01

    We study two different models of optomechanical systems where a temperature gradient between two radiation baths is exploited for inducing self-sustained coherent oscillations of a mechanical resonator. From a thermodynamic perspective, such systems represent quantum instances of self-contained thermal machines converting heat into a periodic mechanical motion and thus they can be interpreted as nano-scale analogues of macroscopic piston engines. Our models are potentially suitable for testing fundamental aspects of quantum thermodynamics in the laboratory and for applications in energy efficient nanotechnology.

  1. 3. ELEVATIONS, ADDITION TO POWER HOUSE. United Engineering Company Ltd., ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. ELEVATIONS, ADDITION TO POWER HOUSE. United Engineering Company Ltd., Alameda Shipyard. John Hudspeth, architect, foot of Main Street, Alameda, California. Sheet 4. Plan no. 10,548. Scale 1/4 inch to the foot, elevations, and one inch to the foot, sections and details. April 30, 1945, last revised 6/19/45. pencil on vellum - United Engineering Company Shipyard, Boiler House, 2900 Main Street, Alameda, Alameda County, CA

  2. Solar-Powered Electric Propulsion Systems: Engineering and Applications

    NASA Technical Reports Server (NTRS)

    Stearns, J. W.; Kerrisk, D. J.

    1966-01-01

    Lightweight, multikilowatt solar power arrays in conjunction with electric propulsion offer potential improvements to space exploration, extending the usefulness of existing launch vehicles to higher-energy missions. Characteristics of solar-powered electric propulsion missions are outlined, and preliminary performance estimates are shown. Spacecraft system engineering is discussed with respect to parametric trade-offs in power and propulsion system design. Relationships between mission performance and propulsion system performance are illustrated. The present state of the art of electric propulsion systems is reviewed and related to the mission requirements identified earlier. The propulsion system design and test requirements for a mission spacecraft are identified and discussed. Although only ion engine systems are currently available, certain plasma propulsion systems offer some advantages in over-all system design. These are identified, and goals are set for plasma-thrustor systems to make them competitive with ion-engine systems for mission applications.

  3. Figure 1: Gaze heat map on a search engine results page. The Good, the Bad, and the Random

    E-print Network

    Dumais, Susan

    , 560 080, India cutrell@microsoft.com ABSTRACT We investigate how people interact with Web search. INTRODUCTION In designing effective search systems, it is important to understand how people searchFigure 1: Gaze heat map on a search engine results page. The Good, the Bad, and the Random: An Eye

  4. Application of the subatmospheric engine to solar thermal power

    NASA Technical Reports Server (NTRS)

    1982-01-01

    The development of a natural gas-fired Brayton engine is discussed. It is intended to be the prime mover for a 10-ton commercial heat pump. This engine has many attractive features that make it an ideal candidate for solar thermal-power generation applications. The unique feature of this engine is its subatmospheric mode of operation. It operates between atmospheric pressure and a partial vacuum. This means that heat is added to the cycle at atmospheric pressure; this permits the receiver to be unpressurized, greatly simplifying its design and cost.

  5. 33 CFR 209.140 - Operations of the Corps of Engineers under the Federal Power Act.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...Engineers under the Federal Power Act. 209.140 ...Navigation and Navigable Waters CORPS OF ENGINEERS...participate under the Federal Power Act. Such operations...licenses for development of power affecting navigable waters; supervision of...

  6. 33 CFR 209.140 - Operations of the Corps of Engineers under the Federal Power Act.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...Engineers under the Federal Power Act. 209.140 ...Navigation and Navigable Waters CORPS OF ENGINEERS...participate under the Federal Power Act. Such operations...licenses for development of power affecting navigable waters; supervision of...

  7. 33 CFR 209.140 - Operations of the Corps of Engineers under the Federal Power Act.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...Engineers under the Federal Power Act. 209.140 ...Navigation and Navigable Waters CORPS OF ENGINEERS...participate under the Federal Power Act. Such operations...licenses for development of power affecting navigable waters; supervision of...

  8. 33 CFR 209.140 - Operations of the Corps of Engineers under the Federal Power Act.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...Engineers under the Federal Power Act. 209.140 ...Navigation and Navigable Waters CORPS OF ENGINEERS...participate under the Federal Power Act. Such operations...licenses for development of power affecting navigable waters; supervision of...

  9. 33 CFR 209.140 - Operations of the Corps of Engineers under the Federal Power Act.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...Engineers under the Federal Power Act. 209.140 ...Navigation and Navigable Waters CORPS OF ENGINEERS...participate under the Federal Power Act. Such operations...licenses for development of power affecting navigable waters; supervision of...

  10. Power control system for a hot gas engine

    DOEpatents

    Berntell, John O. (Staffanstorp, SE)

    1986-01-01

    A power control system for a hot gas engine of the type in which the power output is controlled by varying the mean pressure of the working gas charge in the engine has according to the present invention been provided with two working gas reservoirs at substantially different pressure levels. At working gas pressures below the lower of said levels the high pressure gas reservoir is cut out from the control system, and at higher pressures the low pressure gas reservoir is cut out from the system, thereby enabling a single one-stage compressor to handle gas within a wide pressure range at a low compression ratio.

  11. `Googling' Terrorists: Are Northern Irish Terrorists Visible on Internet Search Engines?

    NASA Astrophysics Data System (ADS)

    Reilly, P.

    In this chapter, the analysis suggests that Northern Irish terrorists are not visible on Web search engines when net users employ conventional Internet search techniques. Editors of mass media organisations traditionally have had the ability to decide whether a terrorist atrocity is `newsworthy,' controlling the `oxygen' supply that sustains all forms of terrorism. This process, also known as `gatekeeping,' is often influenced by the norms of social responsibility, or alternatively, with regard to the interests of the advertisers and corporate sponsors that sustain mass media organisations. The analysis presented in this chapter suggests that Internet search engines can also be characterised as `gatekeepers,' albeit without the ability to shape the content of Websites before it reaches net users. Instead, Internet search engines give priority retrieval to certain Websites within their directory, pointing net users towards these Websites rather than others on the Internet. Net users are more likely to click on links to the more `visible' Websites on Internet search engine directories, these sites invariably being the highest `ranked' in response to a particular search query. A number of factors including the design of the Website and the number of links to external sites determine the `visibility' of a Website on Internet search engines. The study suggests that Northern Irish terrorists and their sympathisers are unlikely to achieve a greater degree of `visibility' online than they enjoy in the conventional mass media through the perpetration of atrocities. Although these groups may have a greater degree of freedom on the Internet to publicise their ideologies, they are still likely to be speaking to the converted or members of the press. Although it is easier to locate Northern Irish terrorist organisations on Internet search engines by linking in via ideology, ideological description searches, such as `Irish Republican' and `Ulster Loyalist,' are more likely to generate links pointing towards the sites of research institutes and independent media organisations than sites sympathetic to Northern Irish terrorist organisations. The chapter argues that Northern Irish terrorists are only visible on search engines if net users select the correct search terms.

  12. Search Engine Advertising: Channel Substitution when Pricing Ads to Context

    E-print Network

    Goldfarb, Avi

    We explore substitution patterns across advertising platforms. Using data on the advertising prices paid by lawyers for 139 Google search terms in 195 locations, we exploit a natural experiment in “ambulance-chaser” ...

  13. Development of Health Information Search Engine Based on Metadata and Ontology

    PubMed Central

    Song, Tae-Min; Jin, Dal-Lae

    2014-01-01

    Objectives The aim of the study was to develop a metadata and ontology-based health information search engine ensuring semantic interoperability to collect and provide health information using different application programs. Methods Health information metadata ontology was developed using a distributed semantic Web content publishing model based on vocabularies used to index the contents generated by the information producers as well as those used to search the contents by the users. Vocabulary for health information ontology was mapped to the Systematized Nomenclature of Medicine Clinical Terms (SNOMED CT), and a list of about 1,500 terms was proposed. The metadata schema used in this study was developed by adding an element describing the target audience to the Dublin Core Metadata Element Set. Results A metadata schema and an ontology ensuring interoperability of health information available on the internet were developed. The metadata and ontology-based health information search engine developed in this study produced a better search result compared to existing search engines. Conclusions Health information search engine based on metadata and ontology will provide reliable health information to both information producer and information consumers. PMID:24872907

  14. Satellite power system: Engineering and economic analysis summary

    NASA Technical Reports Server (NTRS)

    1976-01-01

    A system engineering and economic analysis was conducted to establish typical reference baselines for the photovoltaic, solar thermal, and nuclear satellite power systems. Tentative conclusions indicate that feasibility and economic viability are characteristic of the Satellite Power System. Anticipated technology related to manufacturing, construction, and maintenance operations is described. Fuel consumption, environmental effects, and orbital transfer are investigated. Space shuttles, local space transportation, and the heavy lift launch vehicle required are also discussed.

  15. Stirling engines. (Latest citations from the EI Compendex*plus database). Published Search

    SciTech Connect

    1995-02-01

    The bibliography contains citations concerning Stirling engine technology. Design, development, performance testing, and applications are discussed, including power generation, cryogenic cooling, solar power applications, and ground and marine vehicles. The citations also examine engine component design and material testing results. (Contains 250 citations and includes a subject term index and title list.)

  16. Stirling engines. (Latest citations from the EI Compendex*plus database). Published Search

    SciTech Connect

    1996-05-01

    The bibliography contains citations concerning Stirling engine technology. Design, development, performance testing, and applications are discussed, including power generation, cryogenic cooling, solar power applications, and ground and marine vehicles. The citations also examine engine component design and material testing results. (Contains 50-250 citations and includes a subject term index and title list.) (Copyright NERAC, Inc. 1995)

  17. Stirling engines. (Latest citations from the EI Compendex*plus database). Published Search

    SciTech Connect

    Not Available

    1994-04-01

    The bibliography contains citations concerning Stirling engine technology. Design, development, performance testing, and applications are discussed, including power generation, cryogenic cooling, solar power applications, and ground and marine vehicles. The citations also examine engine component design and material testing results. (Contains 250 citations and includes a subject term index and title list.)

  18. 14 CFR 33.96 - Engine tests in auxiliary power unit (APU) mode.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... Engine tests in auxiliary power unit (APU) mode. 33.96 Section 33.96 ...Engine tests in auxiliary power unit (APU) mode. If the engine is designed...the engine as an auxiliary power unit (“APU mode”), in addition to the...

  19. 14 CFR 33.96 - Engine tests in auxiliary power unit (APU) mode.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Engine tests in auxiliary power unit (APU... Engine tests in auxiliary power unit (APU) mode. If the engine is designed with a propeller brake which... in operation, and remain stopped during operation of the engine as an auxiliary power unit (“APU...

  20. Engineering study for the phase 1 privatization facilities electrical power

    SciTech Connect

    Singh, G., Westinghouse Hanford

    1996-07-18

    This engineering study evaluates the availability of electric power from the existing 13.8 kV substation, BPA 115 kV system,and RL 230 kV transmission line; for supporting the Privatization Phase I Facilities. 230 kV system is a preferable alternative.

  1. 1. Photocopied from photo 25797, Engineering Dept., Utah Power and ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Photocopied from photo 25797, Engineering Dept., Utah Power and Light Co., Salt Lake City, Utah. 'WHEELON HYDRO-ELECTRIC PLANT (1725 KW) STATION, WEST PENSTOCK, 130 KV TRANSFORMERS AND SWITCHYARD AND EAST AND WEST CANALS. NOV 1914.' - Utah Sugar Company, Wheelon Hydoelectric Plant, Bear River, Fielding, Box Elder County, UT

  2. High Thrust-to-Power Annular Engine Technology

    NASA Technical Reports Server (NTRS)

    Patterson, Michael J.; Thomas, Robert E.; Crofton, Mark W.; Young, Jason A.; Foster, John E.

    2015-01-01

    Gridded ion engines have the highest efficiency and total impulse of any mature electric propulsion technology, and have been successfully implemented for primary propulsion in both geocentric and heliocentric environments with excellent ground/in-space correlation of performance. However, they have not been optimized to maximize thrust-to-power, an important parameter for Earth orbit transfer applications. This publication discusses technology development work intended to maximize this parameter. These activities include investigating the capabilities of a non-conventional design approach, the annular engine, which has the potential of exceeding the thrust-to-power of other EP technologies. This publication discusses the status of this work, including the fabrication and initial tests of a large-area annular engine. This work is being conducted in collaboration among NASA Glenn Research Center, The Aerospace Corporation, and the University of Michigan.

  3. High Thrust-to-Power Annular Engine Technology

    NASA Technical Reports Server (NTRS)

    Patterson, Michael; Thomas, Robert; Crofton, Mark; Young, Jason A.; Foster, John E.

    2015-01-01

    Gridded ion engines have the highest efficiency and total impulse of any mature electric propulsion technology, and have been successfully implemented for primary propulsion in both geocentric and heliocentric environments with excellent ground-in-space correlation of performance. However, they have not been optimized to maximize thrust-to-power, an important parameter for Earth orbit transfer applications. This publication discusses technology development work intended to maximize this parameter. These activities include investigating the capabilities of a non-conventional design approach, the annular engine, which has the potential of exceeding the thrust-to-power of other EP technologies. This publication discusses the status of this work, including the fabrication and initial tests of a large-area annular engine. This work is being conducted in collaboration among NASA Glenn Research Center, The Aerospace Corporation, and the University of Michigan.

  4. Global polar geospatial information service retrieval based on search engine and ontology reasoning

    USGS Publications Warehouse

    Chen, Nengcheng; E, Dongcheng; Di, Liping; Gong, Jianya; Chen, Zeqiang

    2007-01-01

    In order to improve the access precision of polar geospatial information service on web, a new methodology for retrieving global spatial information services based on geospatial service search and ontology reasoning is proposed, the geospatial service search is implemented to find the coarse service from web, the ontology reasoning is designed to find the refined service from the coarse service. The proposed framework includes standardized distributed geospatial web services, a geospatial service search engine, an extended UDDI registry, and a multi-protocol geospatial information service client. Some key technologies addressed include service discovery based on search engine and service ontology modeling and reasoning in the Antarctic geospatial context. Finally, an Antarctica multi protocol OWS portal prototype based on the proposed methodology is introduced.

  5. Rankline-Brayton engine powered solar thermal aircraft

    DOEpatents

    Bennett, Charles L. (Livermore, CA)

    2012-03-13

    A solar thermal powered aircraft powered by heat energy from the sun. A Rankine-Brayton hybrid cycle heat engine is carried by the aircraft body for producing power for a propulsion mechanism, such as a propeller or other mechanism for enabling sustained free flight. The Rankine-Brayton engine has a thermal battery, preferably containing a lithium-hydride and lithium mixture, operably connected to it so that heat is supplied from the thermal battery to a working fluid. A solar concentrator, such as reflective parabolic trough, is movably connected to an optically transparent section of the aircraft body for receiving and concentrating solar energy from within the aircraft. Concentrated solar energy is collected by a heat collection and transport conduit, and heat transported to the thermal battery. A solar tracker includes a heliostat for determining optimal alignment with the sun, and a drive motor actuating the solar concentrator into optimal alignment with the sun based on a determination by the heliostat.

  6. Rankine-Brayton engine powered solar thermal aircraft

    DOEpatents

    Bennett, Charles L. (Livermore, CA)

    2009-12-29

    A solar thermal powered aircraft powered by heat energy from the sun. A Rankine-Brayton hybrid cycle heat engine is carried by the aircraft body for producing power for a propulsion mechanism, such as a propeller or other mechanism for enabling sustained free flight. The Rankine-Brayton engine has a thermal battery, preferably containing a lithium-hydride and lithium mixture, operably connected to it so that heat is supplied from the thermal battery to a working fluid. A solar concentrator, such as reflective parabolic trough, is movably connected to an optically transparent section of the aircraft body for receiving and concentrating solar energy from within the aircraft. Concentrated solar energy is collected by a heat collection and transport conduit, and heat transported to the thermal battery. A solar tracker includes a heliostat for determining optimal alignment with the sun, and a drive motor actuating the solar concentrator into optimal alignment with the sun based on a determination by the heliostat.

  7. Clinical evaluation of using semantic searching engine for radiological imaging services in RIS-integrated PACS

    NASA Astrophysics Data System (ADS)

    Ling, Tonghui; Zhang, Kai; Yang, Yuanyuan; Hua, Yanqing; Zhang, Jianguo

    2015-03-01

    We had designed a semantic searching engine (SSE) for radiological imaging to search both reports and images in RIS-integrated PACS environment. In this presentation, we present evaluation results of this SSE about how it impacting the radiologists' behaviors in reporting for different kinds of examinations, and how it improving the performance of retrieval and usage of historical images in RIS-integrated PACS.

  8. SeqWare Query Engine: storing and searching sequence data in the cloud

    PubMed Central

    2010-01-01

    Background Since the introduction of next-generation DNA sequencers the rapid increase in sequencer throughput, and associated drop in costs, has resulted in more than a dozen human genomes being resequenced over the last few years. These efforts are merely a prelude for a future in which genome resequencing will be commonplace for both biomedical research and clinical applications. The dramatic increase in sequencer output strains all facets of computational infrastructure, especially databases and query interfaces. The advent of cloud computing, and a variety of powerful tools designed to process petascale datasets, provide a compelling solution to these ever increasing demands. Results In this work, we present the SeqWare Query Engine which has been created using modern cloud computing technologies and designed to support databasing information from thousands of genomes. Our backend implementation was built using the highly scalable, NoSQL HBase database from the Hadoop project. We also created a web-based frontend that provides both a programmatic and interactive query interface and integrates with widely used genome browsers and tools. Using the query engine, users can load and query variants (SNVs, indels, translocations, etc) with a rich level of annotations including coverage and functional consequences. As a proof of concept we loaded several whole genome datasets including the U87MG cell line. We also used a glioblastoma multiforme tumor/normal pair to both profile performance and provide an example of using the Hadoop MapReduce framework within the query engine. This software is open source and freely available from the SeqWare project (http://seqware.sourceforge.net). Conclusions The SeqWare Query Engine provided an easy way to make the U87MG genome accessible to programmers and non-programmers alike. This enabled a faster and more open exploration of results, quicker tuning of parameters for heuristic variant calling filters, and a common data interface to simplify development of analytical tools. The range of data types supported, the ease of querying and integrating with existing tools, and the robust scalability of the underlying cloud-based technologies make SeqWare Query Engine a nature fit for storing and searching ever-growing genome sequence datasets. PMID:21210981

  9. Web Spam, Social Propaganda and the Evolution of Search Engine Rankings

    NASA Astrophysics Data System (ADS)

    Metaxas, Panagiotis Takis

    Search Engines have greatly influenced the way we experience the web. Since the early days of the web, users have been relying on them to get informed and make decisions. When the web was relatively small, web directories were built and maintained using human experts to screen and categorize pages according to their characteristics. By the mid 1990's, however, it was apparent that the human expert model of categorizing web pages does not scale. The first search engines appeared and they have been evolving ever since, taking over the role that web directories used to play.

  10. 14 CFR 135.381 - Large transport category airplanes: Turbine engine powered: En route limitations: One engine...

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Large transport category airplanes: Turbine... Limitations § 135.381 Large transport category airplanes: Turbine engine powered: En route limitations: One engine inoperative. (a) No person operating a turbine engine powered large transport category...

  11. 14 CFR 135.381 - Large transport category airplanes: Turbine engine powered: En route limitations: One engine...

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 3 2011-01-01 2011-01-01 false Large transport category airplanes: Turbine... Limitations § 135.381 Large transport category airplanes: Turbine engine powered: En route limitations: One engine inoperative. (a) No person operating a turbine engine powered large transport category...

  12. 14 CFR 135.381 - Large transport category airplanes: Turbine engine powered: En route limitations: One engine...

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 3 2014-01-01 2014-01-01 false Large transport category airplanes: Turbine... Limitations § 135.381 Large transport category airplanes: Turbine engine powered: En route limitations: One engine inoperative. (a) No person operating a turbine engine powered large transport category...

  13. 14 CFR 135.381 - Large transport category airplanes: Turbine engine powered: En route limitations: One engine...

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 3 2012-01-01 2012-01-01 false Large transport category airplanes: Turbine... Limitations § 135.381 Large transport category airplanes: Turbine engine powered: En route limitations: One engine inoperative. (a) No person operating a turbine engine powered large transport category...

  14. 14 CFR 135.381 - Large transport category airplanes: Turbine engine powered: En route limitations: One engine...

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 3 2013-01-01 2013-01-01 false Large transport category airplanes: Turbine... Limitations § 135.381 Large transport category airplanes: Turbine engine powered: En route limitations: One engine inoperative. (a) No person operating a turbine engine powered large transport category...

  15. A first look at HealthCyberMap medical semantic subject search engine.

    PubMed

    Boulos, Maged N Kamel

    2004-01-01

    HealthCyberMap (http://healthcybermap.semanticweb.org) is a Semantic Web project that aims at mapping selected parts of health information resources in cyberspace in novel semantic ways to improve their retrieval and navigation. This paper describes HealthCyberMap semantic subject search engine methodology and early prototype which attempt to overcome the limitations of conventional free text search engines. Explicit concepts in resource metadata map onto a brokering domain ontology (a clinical terminology or classification) allowing a Semantic Web search engine to infer implicit meanings (synonyms and semantic relationships) not directly mentioned in either the resource or its metadata. Similarly, user queries would map to the same ontology allowing the search engine to infer the implicit semantics of user queries and use them to optimise retrieval. Related issues of metadata, clinical terminologies and automatic vs. manual indexing of medical Web resources are also discussed, together with future methodological directions, which include the use of a true terminology server as an intelligent broker between user queries and HealthCyberMap pool of resource metadata. A comparative evaluation of the new engine based on relevance metrics is also proposed. PMID:15096685

  16. 14 CFR 33.96 - Engine tests in auxiliary power unit (APU) mode.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT AIRWORTHINESS STANDARDS: AIRCRAFT ENGINES Block Tests; Turbine Aircraft Engines § 33.96 Engine tests in auxiliary power unit (APU) mode. If...

  17. Enhanced engine mechanical efficiency through tailoring of lubricant formulations to localized power cylinder wall conditions

    E-print Network

    Tracey, Ian P

    2015-01-01

    Numerical and experimental studies were performed on an internal combustion engine power cylinder wall's lubricating oil film in order to assess the possibility of tailoring engine lubricants to specific engine configurations ...

  18. Presenting Results of a Search Engine for Recorded Lectures in order to Support Relevance Decisions by the User

    E-print Network

    Hürst, Wolfgang

    Presenting Results of a Search Engine for Recorded Lectures in order to Support Relevance Decisions for search engine interface design is to present the results in a way that supports the users in selecting tasks make varying demands on the interface design and different application domains allow to present

  19. Speed And Power Control Of An Engine By Modulation Of The Load Torque

    DOEpatents

    Ziph, Benjamin (Ann Arbor, MI); Strodtman, Scott (Ypsilanti, MI); Rose, Thomas K (Chelsea, MI)

    1999-01-26

    A system and method of speed and power control for an engine in which speed and power of the engine is controlled by modulation of the load torque. The load torque is manipulated in order to cause engine speed, and hence power to be changed. To accomplish such control, the load torque undergoes a temporary excursion in the opposite direction of the desired speed and power change. The engine and the driven equipment will accelerate or decelerate accordingly as the load torque is decreased or increased, relative to the essentially fixed or constant engine torque. As the engine accelerates or decelerates, its power increases or decreases in proportion.

  20. 14 CFR 121.327 - Supplemental oxygen: Reciprocating engine powered airplanes.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 2010-01-01 false Supplemental oxygen: Reciprocating engine powered airplanes...Requirements § 121.327 Supplemental oxygen: Reciprocating engine powered airplanes...General. Except where supplemental oxygen is provided in accordance with §...

  1. 14 CFR 121.327 - Supplemental oxygen: Reciprocating engine powered airplanes.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 2014-01-01 false Supplemental oxygen: Reciprocating engine powered airplanes...Requirements § 121.327 Supplemental oxygen: Reciprocating engine powered airplanes...General. Except where supplemental oxygen is provided in accordance with §...

  2. 14 CFR 121.327 - Supplemental oxygen: Reciprocating engine powered airplanes.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 2013-01-01 false Supplemental oxygen: Reciprocating engine powered airplanes...Requirements § 121.327 Supplemental oxygen: Reciprocating engine powered airplanes...General. Except where supplemental oxygen is provided in accordance with §...

  3. 14 CFR 121.327 - Supplemental oxygen: Reciprocating engine powered airplanes.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 2011-01-01 false Supplemental oxygen: Reciprocating engine powered airplanes...Requirements § 121.327 Supplemental oxygen: Reciprocating engine powered airplanes...General. Except where supplemental oxygen is provided in accordance with §...

  4. 14 CFR 121.327 - Supplemental oxygen: Reciprocating engine powered airplanes.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 2012-01-01 false Supplemental oxygen: Reciprocating engine powered airplanes...Requirements § 121.327 Supplemental oxygen: Reciprocating engine powered airplanes...General. Except where supplemental oxygen is provided in accordance with §...

  5. 14 CFR 23.1045 - Cooling test procedures for turbine engine powered airplanes.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...2010-01-01 2010-01-01 false Cooling test procedures for turbine engine powered airplanes. 23.1045 Section 23.1045...Powerplant Cooling § 23.1045 Cooling test procedures for turbine engine powered airplanes. (a) Compliance...

  6. 14 CFR 23.1045 - Cooling test procedures for turbine engine powered airplanes.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...2014-01-01 2014-01-01 false Cooling test procedures for turbine engine powered airplanes. 23.1045 Section 23.1045...Powerplant Cooling § 23.1045 Cooling test procedures for turbine engine powered airplanes. (a) Compliance...

  7. 14 CFR 23.1045 - Cooling test procedures for turbine engine powered airplanes.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ...2013-01-01 2013-01-01 false Cooling test procedures for turbine engine powered airplanes. 23.1045 Section 23.1045...Powerplant Cooling § 23.1045 Cooling test procedures for turbine engine powered airplanes. (a) Compliance...

  8. 14 CFR 23.1045 - Cooling test procedures for turbine engine powered airplanes.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...2011-01-01 2011-01-01 false Cooling test procedures for turbine engine powered airplanes. 23.1045 Section 23.1045...Powerplant Cooling § 23.1045 Cooling test procedures for turbine engine powered airplanes. (a) Compliance...

  9. 14 CFR 23.1045 - Cooling test procedures for turbine engine powered airplanes.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...2012-01-01 2012-01-01 false Cooling test procedures for turbine engine powered airplanes. 23.1045 Section 23.1045...Powerplant Cooling § 23.1045 Cooling test procedures for turbine engine powered airplanes. (a) Compliance...

  10. Efficiency at maximum power of a chemical engine

    NASA Astrophysics Data System (ADS)

    Hooyberghs, Hans; Cleuren, Bart; Salazar, Alberto; Indekeu, Joseph O.; Van den Broeck, Christian

    2013-10-01

    A cyclically operating chemical engine is considered that converts chemical energy into mechanical work. The working fluid is a gas of finite-sized spherical particles interacting through elastic hard collisions. For a generic transport law for particle uptake and release, the efficiency at maximum power ?mp takes the form 1/2+c ? ? + O(? ? ^2), with 1/2 a universal constant and ?? the chemical potential difference between the particle reservoirs. The linear coefficient c is zero for engines featuring a so-called left/right symmetry or particle fluxes that are antisymmetric in the applied chemical potential difference. Remarkably, the leading constant in ?mp is non-universal with respect to an exceptional modification of the transport law. For a nonlinear transport model, we obtain ?mp = 1/(? + 1), with ? > 0 the power of ?? in the transport equation.

  11. Efficiency at maximum power of a chemical engine

    E-print Network

    Hooyberghs, Hans; Salazar, Alberto; Indekeu, Joseph O; Broeck, Christian Van den

    2013-01-01

    A cyclically operating chemical engine is considered that converts chemical energy into mechanical work. The working fluid is a gas of finite-sized spherical particles interacting through elastic hard collisions. For a generic transport law for particle uptake and release, the efficiency at maximum power $\\eta$ takes the form 1/2+c\\Delta \\mu + O(\\Delta \\mu^2), with 1/2 a universal constant and $\\Delta \\mu$ the chemical potential difference between the particle reservoirs. The linear coefficient c is zero for engines featuring a so-called left/right symmetry or particle fluxes that are antisymmetric in the applied chemical potential difference. Remarkably, the leading constant in $\\eta$ is non-universal with respect to an exceptional modification of the transport law. For a nonlinear transport model we obtain \\eta = 1/(\\theta +1), with \\theta >0 the power of $\\Delta \\mu$ in the transport equation

  12. Faculty of Engineering, LTH General syllabus for third-cycle studies in Thermal Power Engineering

    E-print Network

    , chemistry, heat transfer and fluid mechanics. Research in thermal power engineering aims towards the goal The programmes aim to develop: creativity and independence with the ability to formulate advanced research of advanced third-cycle courses at both departmental and faculty level a good balance between courses

  13. Information Retrieval Information retrieval systems are everywhere: Web search engines, library catalogs, store

    E-print Network

    Soergel, Dagobert

    Information Retrieval Information retrieval systems are everywhere: Web search engines, library catalogs, store catalogs, cookbook indexes, and so on. Information retrieval (IR), also called information storage and retrieval (ISR or ISAR) or information organization and retrieval, is the art and science

  14. A study of medical and health queries to web search engines.

    PubMed

    Spink, Amanda; Yang, Yin; Jansen, Jim; Nykanen, Pirrko; Lorence, Daniel P; Ozmutlu, Seda; Ozmutlu, H Cenk

    2004-03-01

    This paper reports findings from an analysis of medical or health queries to different web search engines. We report results: (i). comparing samples of 10000 web queries taken randomly from 1.2 million query logs from the AlltheWeb.com and Excite.com commercial web search engines in 2001 for medical or health queries, (ii). comparing the 2001 findings from Excite and AlltheWeb.com users with results from a previous analysis of medical and health related queries from the Excite Web search engine for 1997 and 1999, and (iii). medical or health advice-seeking queries beginning with the word 'should'. Findings suggest: (i). a small percentage of web queries are medical or health related, (ii). the top five categories of medical or health queries were: general health, weight issues, reproductive health and puberty, pregnancy/obstetrics, and human relationships, and (iii). over time, the medical and health queries may have declined as a proportion of all web queries, as the use of specialized medical/health websites and e-commerce-related queries has increased. Findings provide insights into medical and health-related web querying and suggests some implications for the use of the general web search engines when seeking medical/health information. PMID:15023208

  15. A Music Search Engine for Therapeutic Gait Training Zhonghua Li1

    E-print Network

    Wang, Ye

    Factors Keywords Music Therapy, Gait Training, Parkinson's Disease 1. INTRODUCTION Parkinson's diseaseA Music Search Engine for Therapeutic Gait Training Zhonghua Li1 , Qiaoliang Xiang1 , Jason Hockman of Singapore, Singapore 2 Schulich School of Music, McGill University, Canada {lizhongh, xiangqiaoliang, yiyu09

  16. An Adaptive, Knowledge-Driven Medical Image Search Engine for Interactive Diffuse Parenchymal Lung Disease

    E-print Network

    Chandy, John A.

    An Adaptive, Knowledge-Driven Medical Image Search Engine for Interactive Diffuse Parenchymal Lung Abstract Characterization and quantification of the severity of diffuse parenchymal lung diseases (DPLD have been obtained on a small test set. Keywords: CT; texture analysis; interstitial lung disease

  17. Search Engine Designer for Tomorrow: Interview with TextWise's Elizabeth Liddy.

    ERIC Educational Resources Information Center

    Quint, Barbara

    1998-01-01

    Presents an interview with Elizabeth Liddy, president of TextWise, an information access and analytics company. Background on TextWise is provided; advanced search engines are discussed; TextWise products and projects are described; and the changing role of information professionals is considered. (MES)

  18. Detecting influenza epidemics using search engine query data 1 Detecting influenza epidemics using

    E-print Network

    Tomkins, Andrew

    Detecting influenza epidemics using search engine query data 1 Detecting influenza epidemics using://dx.doi.org/10.1038/nature07634 Epidemics of seasonal influenza are a major public health concern, causing tens to seasonal influenza, a new strain of influenza virus against which no prior immunity exists

  19. Google's PageRank and Beyond: The Science of Search Engine Rankings

    E-print Network

    Kunkle, Tom

    Google's PageRank and Beyond: The Science of Search Engine Rankings Amy Langville langvillea · Based on matrix methods #12;Term­Document Matrices Start with dictionary of terms Words or phrases ( e.g., landing gear) #12;Term­Document Matrices Start with dictionary of terms Words or phrases ( e.g., landing

  20. A novel algorithm for validating peptide identification from a shotgun proteomics search engine.

    PubMed

    Jian, Ling; Niu, Xinnan; Xia, Zhonghang; Samir, Parimal; Sumanasekera, Chiranthani; Mu, Zheng; Jennings, Jennifer L; Hoek, Kristen L; Allos, Tara; Howard, Leigh M; Edwards, Kathryn M; Weil, P Anthony; Link, Andrew J

    2013-03-01

    Liquid chromatography coupled with tandem mass spectrometry (LC-MS/MS) has revolutionized the proteomics analysis of complexes, cells, and tissues. In a typical proteomic analysis, the tandem mass spectra from a LC-MS/MS experiment are assigned to a peptide by a search engine that compares the experimental MS/MS peptide data to theoretical peptide sequences in a protein database. The peptide spectra matches are then used to infer a list of identified proteins in the original sample. However, the search engines often fail to distinguish between correct and incorrect peptides assignments. In this study, we designed and implemented a novel algorithm called De-Noise to reduce the number of incorrect peptide matches and maximize the number of correct peptides at a fixed false discovery rate using a minimal number of scoring outputs from the SEQUEST search engine. The novel algorithm uses a three-step process: data cleaning, data refining through a SVM-based decision function, and a final data refining step based on proteolytic peptide patterns. Using proteomics data generated on different types of mass spectrometers, we optimized the De-Noise algorithm on the basis of the resolution and mass accuracy of the mass spectrometer employed in the LC-MS/MS experiment. Our results demonstrate De-Noise improves peptide identification compared to other methods used to process the peptide sequence matches assigned by SEQUEST. Because De-Noise uses a limited number of scoring attributes, it can be easily implemented with other search engines. PMID:23402659

  1. A New Era of Search Engines: Not Just Web Pages Anymore.

    ERIC Educational Resources Information Center

    Hock, Ran

    2002-01-01

    Discusses various types of information that can be retrieved from the Web via search engines. Highlights include Web pages; time frames, including historical coverage and currentness; text pages in formats other than HTML; directory sites; news articles; discussion groups; images; and audio and video. (LRW)

  2. A User-Centered Approach to Evaluating Human Interaction with Web Search Engines: An Exploratory Study.

    ERIC Educational Resources Information Center

    Spink, Amanda

    2002-01-01

    Explores a user-centered approach to evaluating the Web search engine Inquirus. Inquirus was rated highly by users on various usability measures; all users experienced some level of shift/change in their information problem, information seeking, and personal knowledge due to their Inquirus interaction; and different users experienced different…

  3. Which Search Engine Is the Most Used One among University Students?

    ERIC Educational Resources Information Center

    Cavus, Nadire; Alpan, Kezban

    2010-01-01

    The importance of information is increasing in the information age that we are living in with internet becoming the major information resource for people with rapidly increasing number of documents. This situation makes finding information on the internet without web search engines impossible. The aim of the study is revealing most widely used…

  4. Towards Context-Based Search Engine Selection David B. Leake and Ryan Scherle

    E-print Network

    Leake, David B.

    ," for exam- ple, the rst page of results for a recent query to AltaVista contained pointers to information. IUI'01, January 14-17, 2001, Santa Fe, New Mexico, USA. Copyright 2001 ACM 1-58113-325-1/01/0001 ..$5-purpose search engine. Our approach exam- ines the hypothesis that source selection is a more tractable problem

  5. Internet Visibility Measured by Search Engine Hits: A Test on Virginia Colleges and Universities.

    ERIC Educational Resources Information Center

    Ridley, Dennis R.

    This study selected 25 private colleges and universities and 14 public colleges and universities in Virginia. Internet search engines were used to record the number of hits they reported for each of the schools, as a measure of the institution's visibility in the Internet world. Findings indicated that there was a high correlation between…

  6. A Comprehensive and Systematic Model of User Evaluation of Web Search Engines: I. Theory and Background.

    ERIC Educational Resources Information Center

    Su, Louise T.

    2003-01-01

    Reports on a project that proposes and tests a comprehensive and systematic model of user evaluation of Web search engines. This article describes the model, including a set of criteria and measures and a method for implementation. A literature review portrays settings for developing the model and places applications of the model in contemporary…

  7. Uncovering the Hidden Web, Part I: Finding What the Search Engines Don't. ERIC Digest.

    ERIC Educational Resources Information Center

    Mardis, Marcia

    Currently, the World Wide Web contains an estimated 7.4 million sites (OCLC, 2001). Yet even the most experienced searcher, using the most robust search engines, can access only about 16% of these pages (Dahn, 2001). The other 84% of the publicly available information on the Web is referred to as the "hidden,""invisible," or "deep" Web. This…

  8. Eugene Garfield, Francis Narin, and PageRank: The Theoretical Bases of the Google Search Engine

    E-print Network

    Bensman, Stephen J

    2013-01-01

    This paper presents a test of the validity of using Google Scholar to evaluate the publications of researchers by comparing the premises on which its search engine, PageRank, is based, to those of Garfield's theory of citation indexing. It finds that the premises are identical and that PageRank and Garfield's theory of citation indexing validate each other.

  9. Disaster SitRep -A Vertical Search Engine and Information Analysis Tool in Disaster Management Domain

    E-print Network

    Chen, Shu-Ching

    resources for major disaster recovery planning and management. Our proposed techniques create a disaster and lack of a well-designed and regularly tested disaster plan make companies, particularly smallDisaster SitRep - A Vertical Search Engine and Information Analysis Tool in Disaster Management

  10. The Web in Theoretical Linguistics Research: Two Case Studies using the Linguist's Search Engine

    E-print Network

    Daume III, Hal

    The Web in Theoretical Linguistics Research: Two Case Studies using the Linguist's Search Engine. Introduction The whisper of "does that sound ok to you?" is a familiar sound to most linguists: we often hear and in linguistics more generally. As Bard et al. (1996) put it, each linguistic judgment is a ``small and imperfect

  11. The Web in Theoretical Linguistics Research: Two Case Studies Using the Linguist's Search Engine*

    E-print Network

    Daume III, Hal

    The Web in Theoretical Linguistics Research: Two Case Studies Using the Linguist's Search Engine. Introduction The whisper of "does that sound ok to you?" is a familiar sound to most linguists: we often hear and in linguistics more generally. As Bard, et al. (1996) put it, each linguistic judgment is a "small and imperfect

  12. Web Dynamics and their Ramifications for the Development of Web Search Engines

    E-print Network

    Ng, Wilfred Siu Hung

    Web Dynamics and their Ramifications for the Development of Web Search Engines Yiping Ke Lin Deng Email: {keyiping, ldeng, wilfred, dlee}@cs.ust.hk Abstract The World Wide Web has become the largest with conven- tional information sources, the Web is highly dynamic in the following four factors: size (i

  13. Conceptual design of single turbofan engine powered light aircraft

    NASA Technical Reports Server (NTRS)

    Snyder, F. S.; Voorhees, C. G.; Heinrich, A. M.; Baisden, D. N.

    1977-01-01

    The conceptual design of a four place single turbofan engine powered light aircraft was accomplished utilizing contemporary light aircraft conventional design techniques as a means of evaluating the NASA-Ames General Aviation Synthesis Program (GASP) as a preliminary design tool. In certain areas, disagreement or exclusion were found to exist between the results of the conventional design and GASP processes. Detail discussion of these points along with the associated contemporary design methodology are presented.

  14. 14 CFR 121.329 - Supplemental oxygen for sustenance: Turbine engine powered airplanes.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... engine powered airplanes. 121.329 Section 121.329 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION... Equipment Requirements § 121.329 Supplemental oxygen for sustenance: Turbine engine powered airplanes. (a) General. When operating a turbine engine powered airplane, each certificate holder shall equip...

  15. 14 CFR 121.329 - Supplemental oxygen for sustenance: Turbine engine powered airplanes.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... engine powered airplanes. 121.329 Section 121.329 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION... Equipment Requirements § 121.329 Supplemental oxygen for sustenance: Turbine engine powered airplanes. (a) General. When operating a turbine engine powered airplane, each certificate holder shall equip...

  16. 14 CFR 121.331 - Supplemental oxygen requirements for pressurized cabin airplanes: Reciprocating engine powered...

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... pressurized cabin airplanes: Reciprocating engine powered airplanes. 121.331 Section 121.331 Aeronautics and... pressurized cabin airplanes: Reciprocating engine powered airplanes. (a) When operating a reciprocating engine powered airplane pressurized cabin, each certificate holder shall equip the airplane to comply...

  17. 14 CFR 121.329 - Supplemental oxygen for sustenance: Turbine engine powered airplanes.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... engine powered airplanes. 121.329 Section 121.329 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION... Equipment Requirements § 121.329 Supplemental oxygen for sustenance: Turbine engine powered airplanes. (a) General. When operating a turbine engine powered airplane, each certificate holder shall equip...

  18. 14 CFR 121.331 - Supplemental oxygen requirements for pressurized cabin airplanes: Reciprocating engine powered...

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... pressurized cabin airplanes: Reciprocating engine powered airplanes. 121.331 Section 121.331 Aeronautics and... pressurized cabin airplanes: Reciprocating engine powered airplanes. (a) When operating a reciprocating engine powered airplane pressurized cabin, each certificate holder shall equip the airplane to comply...

  19. 14 CFR 121.331 - Supplemental oxygen requirements for pressurized cabin airplanes: Reciprocating engine powered...

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... pressurized cabin airplanes: Reciprocating engine powered airplanes. 121.331 Section 121.331 Aeronautics and... pressurized cabin airplanes: Reciprocating engine powered airplanes. (a) When operating a reciprocating engine powered airplane pressurized cabin, each certificate holder shall equip the airplane to comply...

  20. 14 CFR 121.331 - Supplemental oxygen requirements for pressurized cabin airplanes: Reciprocating engine powered...

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... pressurized cabin airplanes: Reciprocating engine powered airplanes. 121.331 Section 121.331 Aeronautics and... pressurized cabin airplanes: Reciprocating engine powered airplanes. (a) When operating a reciprocating engine powered airplane pressurized cabin, each certificate holder shall equip the airplane to comply...

  1. 14 CFR 121.329 - Supplemental oxygen for sustenance: Turbine engine powered airplanes.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... engine powered airplanes. 121.329 Section 121.329 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION... Equipment Requirements § 121.329 Supplemental oxygen for sustenance: Turbine engine powered airplanes. (a) General. When operating a turbine engine powered airplane, each certificate holder shall equip...

  2. 14 CFR 121.331 - Supplemental oxygen requirements for pressurized cabin airplanes: Reciprocating engine powered...

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... pressurized cabin airplanes: Reciprocating engine powered airplanes. 121.331 Section 121.331 Aeronautics and... pressurized cabin airplanes: Reciprocating engine powered airplanes. (a) When operating a reciprocating engine powered airplane pressurized cabin, each certificate holder shall equip the airplane to comply...

  3. 14 CFR 121.329 - Supplemental oxygen for sustenance: Turbine engine powered airplanes.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... engine powered airplanes. 121.329 Section 121.329 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION... Equipment Requirements § 121.329 Supplemental oxygen for sustenance: Turbine engine powered airplanes. (a) General. When operating a turbine engine powered airplane, each certificate holder shall equip...

  4. GeneView: a comprehensive semantic search engine for PubMed.

    PubMed

    Thomas, Philippe; Starlinger, Johannes; Vowinkel, Alexander; Arzt, Sebastian; Leser, Ulf

    2012-07-01

    Research results are primarily published in scientific literature and curation efforts cannot keep up with the rapid growth of published literature. The plethora of knowledge remains hidden in large text repositories like MEDLINE. Consequently, life scientists have to spend a great amount of time searching for specific information. The enormous ambiguity among most names of biomedical objects such as genes, chemicals and diseases often produces too large and unspecific search results. We present GeneView, a semantic search engine for biomedical knowledge. GeneView is built upon a comprehensively annotated version of PubMed abstracts and openly available PubMed Central full texts. This semi-structured representation of biomedical texts enables a number of features extending classical search engines. For instance, users may search for entities using unique database identifiers or they may rank documents by the number of specific mentions they contain. Annotation is performed by a multitude of state-of-the-art text-mining tools for recognizing mentions from 10 entity classes and for identifying protein-protein interactions. GeneView currently contains annotations for >194 million entities from 10 classes for ?21 million citations with 271,000 full text bodies. GeneView can be searched at http://bc3.informatik.hu-berlin.de/. PMID:22693219

  5. What is the prevalence of health-related searches on the World Wide Web? Qualitative and quantitative analysis of search engine queries on the Internet

    PubMed Central

    Eysenbach, G.; Kohler, Ch.

    2003-01-01

    While health information is often said to be the most sought after information on the web, empirical data on the actual frequency of health-related searches on the web are missing. In the present study we aimed to determine the prevalence of health-related searches on the web by analyzing search terms entered by people into popular search engines. We also made some preliminary attempts in qualitatively describing and classifying these searches. Occasional difficulties in determining what constitutes a “health-related” search led us to propose and validate a simple method to automatically classify a search string as “health-related”. This method is based on determining the proportion of pages on the web containing the search string and the word “health”, as a proportion of the total number of pages with the search string alone. Using human codings as gold standard we plotted a ROC curve and determined empirically that if this “co-occurance rate” is larger than 35%, the search string can be said to be health-related (sensitivity: 85.2%, specificity 80.4%). The results of our “human” codings of search queries determined that about 4.5% of all searches are “health-related”. We estimate that globally a minimum of 6.75 Million health-related searches are being conducted on the web every day, which is roughly the same number of searches that have been conducted on the NLM Medlars system in 1996 in a full year. PMID:14728167

  6. 14 CFR 121.333 - Supplemental oxygen for emergency descent and for first aid; turbine engine powered airplanes...

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...for emergency descent and for first aid; turbine engine powered airplanes with pressurized...for emergency descent and for first aid; turbine engine powered airplanes with pressurized... (a) General. When operating a turbine engine powered airplane with a...

  7. 14 CFR 121.333 - Supplemental oxygen for emergency descent and for first aid; turbine engine powered airplanes...

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...for emergency descent and for first aid; turbine engine powered airplanes with pressurized...for emergency descent and for first aid; turbine engine powered airplanes with pressurized... (a) General. When operating a turbine engine powered airplane with a...

  8. 14 CFR 121.333 - Supplemental oxygen for emergency descent and for first aid; turbine engine powered airplanes...

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...for emergency descent and for first aid; turbine engine powered airplanes with pressurized...for emergency descent and for first aid; turbine engine powered airplanes with pressurized... (a) General. When operating a turbine engine powered airplane with a...

  9. 14 CFR 121.333 - Supplemental oxygen for emergency descent and for first aid; turbine engine powered airplanes...

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...for emergency descent and for first aid; turbine engine powered airplanes with pressurized...for emergency descent and for first aid; turbine engine powered airplanes with pressurized... (a) General. When operating a turbine engine powered airplane with a...

  10. 14 CFR 121.333 - Supplemental oxygen for emergency descent and for first aid; turbine engine powered airplanes...

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ...for emergency descent and for first aid; turbine engine powered airplanes with pressurized...for emergency descent and for first aid; turbine engine powered airplanes with pressurized... (a) General. When operating a turbine engine powered airplane with a...

  11. Nowcasting economic and social data: when and why search engine data fails, an illustration using Google Flu Trends

    E-print Network

    Ormerod, Paul; Bentley, R Alexander

    2014-01-01

    Obtaining an accurate picture of the current state of the economy is particularly important to central banks and finance ministries, and of epidemics to health ministries. There is increasing interest in the use of search engine data to provide such 'nowcasts' of social and economic indicators. However, people may search for a phrase because they independently want the information, or they may search simply because many others are searching for it. We consider the effect of the motivation for searching on the accuracy of forecasts made using search engine data of contemporaneous social and economic indicators. We illustrate the implications for forecasting accuracy using four episodes in which Google Flu Trends data gave accurate predictions of actual flu cases, and four in which the search data over-predicted considerably. Using a standard statistical methodology, the Bass diffusion model, we show that the independent search for information motive was much stronger in the cases of accurate prediction than in...

  12. Seeds of Solutions(TM): An economical & efficient approach towards power engineering education

    NASA Astrophysics Data System (ADS)

    Alvarez, Eli

    Power demands are set to increase over the next twenty years; however, research shows that there may be a shortage of power engineers due to an appreciable percentage of the current power engineer workforce retiring, insufficient enrollment in power engineering programs and a lack of emphasis in power engineering at the university level. This thesis provides supporting research for future power demands, workforce and faculty shortages. Using temporary research in modern learning / teaching styles, student / teacher perceptions, educational trends and regional course offerings, this thesis describes a learning approach towards power engineering education. Designed specifically for universities with little to no power engineering course offerings and universities that wish to augment their existing approach, the approach incorporates an emphasis in fundamentals and engineering design making it economical and easy to implement. This thesis also includes three (3) video laboratory examples incorporating all elements of the approach.

  13. MAPPER: a search engine for the computational identification of putative transcription factor binding sites in multiple genomes

    PubMed Central

    Marinescu, Voichita D; Kohane, Isaac S; Riva, Alberto

    2005-01-01

    Background Cis-regulatory modules are combinations of regulatory elements occurring in close proximity to each other that control the spatial and temporal expression of genes. The ability to identify them in a genome-wide manner depends on the availability of accurate models and of search methods able to detect putative regulatory elements with enhanced sensitivity and specificity. Results We describe the implementation of a search method for putative transcription factor binding sites (TFBSs) based on hidden Markov models built from alignments of known sites. We built 1,079 models of TFBSs using experimentally determined sequence alignments of sites provided by the TRANSFAC and JASPAR databases and used them to scan sequences of the human, mouse, fly, worm and yeast genomes. In several cases tested the method identified correctly experimentally characterized sites, with better specificity and sensitivity than other similar computational methods. Moreover, a large-scale comparison using synthetic data showed that in the majority of cases our method performed significantly better than a nucleotide weight matrix-based method. Conclusion The search engine, available at , allows the identification, visualization and selection of putative TFBSs occurring in the promoter or other regions of a gene from the human, mouse, fly, worm and yeast genomes. In addition it allows the user to upload a sequence to query and to build a model by supplying a multiple sequence alignment of binding sites for a transcription factor of interest. Due to its extensive database of models, powerful search engine and flexible interface, MAPPER represents an effective resource for the large-scale computational analysis of transcriptional regulation. PMID:15799782

  14. Antiproton powered propulsion with magnetically confined plasma engines

    SciTech Connect

    Lapointe, M.R.

    1989-08-01

    Matter-antimatter annihilation releases more energy per unit mass than any other method of energy production, making it an attractive energy source for spacecraft propulsion. In the magnetically confined plasma engine, antiproton beams are injected axially into a pulsed magnetic mirror system, where they annihilate with an initially neutral hydrogen gas. The resulting charged annihilation products transfer energy to the hydrogen propellant, which is then exhausted through one end of the pulsed mirror system to provide thrust. The calculated energy transfer efficiencies for a low number density (10(14)/cu cm) hydrogen propellant are insufficient to warrant operating the engine in this mode. Efficiencies are improved using moderate propellant number densities (10(16)/cu cm), but the energy transferred to the plasma in a realistic magnetic mirror system is generally limited to less than 2 percent of the initial proton-antiproton annihilation energy. The energy transfer efficiencies are highest for high number density (10(18)/cu cm) propellants, but plasma temperatures are reduced by excessive radiation losses. Low to moderate thrust over a wide range of specific impulse can be generated with moderate propellant number densities, while higher thrust but lower specific impulse may be generated using high propellant number densities. Significant mass will be required to shield the superconducting magnet coils from the high energy gamma radiation emitted by neutral pion decay. The mass of such a radiation shield may dominate the total engine mass, and could severely diminish the performance of antiproton powered engines which utilize magnetic confinement. The problem is compounded in the antiproton powered plasma engine, where lower energy plasma bremsstrahlung radiation may cause shield surface ablation and degradation.

  15. Antiproton powered propulsion with magnetically confined plasma engines

    NASA Technical Reports Server (NTRS)

    Lapointe, Michael R.

    1989-01-01

    Matter-antimatter annihilation releases more energy per unit mass than any other method of energy production, making it an attractive energy source for spacecraft propulsion. In the magnetically confined plasma engine, antiproton beams are injected axially into a pulsed magnetic mirror system, where they annihilate with an initially neutral hydrogen gas. The resulting charged annihilation products transfer energy to the hydrogen propellant, which is then exhausted through one end of the pulsed mirror system to provide thrust. The calculated energy transfer efficiencies for a low number density (10(14)/cu cm) hydrogen propellant are insufficient to warrant operating the engine in this mode. Efficiencies are improved using moderate propellant number densities (10(16)/cu cm), but the energy transferred to the plasma in a realistic magnetic mirror system is generally limited to less than 2 percent of the initial proton-antiproton annihilation energy. The energy transfer efficiencies are highest for high number density (10(18)/cu cm) propellants, but plasma temperatures are reduced by excessive radiation losses. Low to moderate thrust over a wide range of specific impulse can be generated with moderate propellant number densities, while higher thrust but lower specific impulse may be generated using high propellant number densities. Significant mass will be required to shield the superconducting magnet coils from the high energy gamma radiation emitted by neutral pion decay. The mass of such a radiation shield may dominate the total engine mass, and could severely diminish the performance of antiproton powered engines which utilize magnetic confinement. The problem is compounded in the antiproton powered plasma engine, where lower energy plasma bremsstrahlung radiation may cause shield surface ablation and degradation.

  16. Proceedings Ninth International Conference on Human-Computer Interaction, August, 2001 Effect of Web Search Engine Design on User Performance and Preference

    E-print Network

    test measures indicate that the participants evaluated the Alta Vista and MSN search engines more favorably than the Excite and InfoSeek search engines. An H Test of the preference ranks revealed that Alta 2.1 Test participants Twelve participants evaluated four search engines. In order to participate

  17. Start Your Search Engines. Part One: Taming Google--and Other Tips to Master Web Searches

    ERIC Educational Resources Information Center

    Adam, Anna; Mowers, Helen

    2008-01-01

    There are a lot of useful tools on the Web, all those social applications, and the like. Still most people go online for one thing--to perform a basic search. For most fact-finding missions, the Web is there. But--as media specialists well know--the sheer wealth of online information can hamper efforts to focus on a few reliable references.…

  18. Developing a distributed HTML5-based search engine for geospatial resource discovery

    NASA Astrophysics Data System (ADS)

    ZHOU, N.; XIA, J.; Nebert, D.; Yang, C.; Gui, Z.; Liu, K.

    2013-12-01

    With explosive growth of data, Geospatial Cyberinfrastructure(GCI) components are developed to manage geospatial resources, such as data discovery and data publishing. However, the efficiency of geospatial resources discovery is still challenging in that: (1) existing GCIs are usually developed for users of specific domains. Users may have to visit a number of GCIs to find appropriate resources; (2) The complexity of decentralized network environment usually results in slow response and pool user experience; (3) Users who use different browsers and devices may have very different user experiences because of the diversity of front-end platforms (e.g. Silverlight, Flash or HTML). To address these issues, we developed a distributed and HTML5-based search engine. Specifically, (1)the search engine adopts a brokering approach to retrieve geospatial metadata from various and distributed GCIs; (2) the asynchronous record retrieval mode enhances the search performance and user interactivity; (3) the search engine based on HTML5 is able to provide unified access capabilities for users with different devices (e.g. tablet and smartphone).

  19. Study of a High Voltage Ion Engine Power Supply

    NASA Technical Reports Server (NTRS)

    Stuart, Thomas A.; King, Roger J.; Mayer, Eric

    1996-01-01

    A complete laboratory breadboard version of a ion engine power converter was built and tested. This prototype operated on a line voltage of 80-120 Vdc, and provided output ratings of 1100 V at 1.8 kW, and 250 V at 20 mA. The high-voltage (HV) output voltage rating was revised from the original value of 1350 V at the beginning of the project. The LV output was designed to hold up during a 1-A surge current lasting up to 1 second. The prototype power converter included a internal housekeeping power supply which also operated from the line input. The power consumed in housekeeping was included in the overall energy budget presented for the ion engine converter. HV and LV output voltage setpoints were commanded through potentiometers. The HV converter itself reached its highest power efficiency of slightly over 93% at low line and maximum output. This would dip below 90% at high line. The no-load (rated output voltages, zero load current) power consumption of the entire system was less than 13 W. A careful loss breakdown shows that converter losses are predominately Metal-Oxide-Semiconductor Field Effect Transistor (MOSFET) conduction losses and HV rectifier snubbing losses, with the rectifier snubbing losses becoming predominant at high line. This suggests that further improvements in power efficiency could best be obtained by either developing a rectifier that was adequately protected against voltage overshoot with less snubbing, or by developing a pre-regulator to reduced the range of line voltage on the converter. The transient testing showed the converter to be fully protected against load faults, including a direct short-circuit from the HV output to the LV output terminals. Two currents sensors were used: one to directly detect any core ratcheting on the output transformer and re-initiate a soft start, and the other to directly detect a load fault and quickly shut down the converter for load protection. The finished converter has been extensively fault tested without failure. The finished converter has been packaged suitable for use as a laboratory prototype for further testing. The finished converter is readily transportable. An article on design issues for high voltage converters for ion engines is included as an attachement.

  20. 14 CFR 125.377 - Fuel supply: Turbine-engine-powered airplanes other than turbopropeller.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 3 2013-01-01 2013-01-01 false Fuel supply: Turbine-engine-powered... AIRCRAFT Flight Release Rules § 125.377 Fuel supply: Turbine-engine-powered airplanes other than... takeoff a turbine-powered airplane (other than a turbopropeller-powered airplane) unless, considering...

  1. Increasing Student Interest and Comprehension in Power Engineering Education at the Graduate and Undergraduate Levels

    E-print Network

    curriculum in electric power engineering. The main focus of the paper is the modernization of the way power and restructured environment in power engineering and the broadening of the area in general. At the undergraduate and electric power quality are described. The implementation of changes as those reported here were made

  2. Advanced tendencies in development of photovoltaic cells for power engineering

    NASA Astrophysics Data System (ADS)

    Strebkov, D. S.

    2015-01-01

    Development of solar power engineering must be based on original innovative Russian and world technologies. It is necessary to develop promising Russian technologies of manufacturing of photovoltaic cells and semiconductor materials: chlorine-free technology for obtaining solar silicon; matrix solar cell technology with an efficiency of 25-30% upon the conversion of concentrated solar, thermal, and laser radiation; encapsulation technology for high-voltage silicon solar modules with a voltage up to 1000 V and a service life up to 50 years; new methods of concentration of solar radiation with the balancing illumination of photovoltaic cells at 50-100-fold concentration; and solar power systems with round-the-clock production of electrical energy that do not require energy storage devices and reserve sources of energy. The advanced tendency in silicon power engineering is the use of high-temperature reactions in heterogeneous modular silicate solutions for long-term (over one year) production of heat and electricity in the autonomous mode.

  3. BRAQUE: A Novel Powerful Search Interface to Large Textual Databases

    NASA Astrophysics Data System (ADS)

    Brinkmann, J.

    BRAQUE, which stands for BRowse And QUEry Assistant, is a MS Windows interface to the bibliographic and fulltext databases of ESA-IRS, the European Space Agency Information Retrieval Service. BRAQUE allows to search, browse, retrieve, display and manage information from ESA-IRS databases without prior knowledge of the command language used by ESA-IRS. The software applies innovative and intuitive terminology and methodology throughout. Its guided and directed search, its "Idea Finder" module, as well as the "Associate" function, allows also the non-expert searcher to design professional queries and to achieve a high recall and precision.

  4. Engine Power Turbine and Propulsion Pod Arrangement Study

    NASA Technical Reports Server (NTRS)

    Robuck, Mark; Zhang, Yiyi

    2014-01-01

    A study has been conducted for NASA Glenn Research Center under contract NNC10BA05B, Task NNC11TA80T to identify beneficial arrangements of the turboshaft engine, transmissions and related systems within the propulsion pod nacelle of NASA's Large Civil Tilt-Rotor 2nd iteration (LCTR2) vehicle. Propulsion pod layouts were used to investigate potential advantages, disadvantages, as well as constraints of various arrangements assuming front or aft shafted engines. Results from previous NASA LCTR2 propulsion system studies and tasks performed by Boeing under NASA contracts are used as the basis for this study. This configuration consists of two Fixed Geometry Variable Speed Power Turbine Engines and related drive and rotor systems (per nacelle) arranged in tilting nacelles near the wing tip. Entry-into-service (EIS) 2035 technology is assumed for both the engine and drive systems. The variable speed rotor system changes from 100 percent speed for hover to 54 percent speed for cruise by the means of a two speed gearbox concept developed under previous NASA contracts. Propulsion and drive system configurations that resulted in minimum vehicle gross weight were identified in previous work and used here. Results reported in this study illustrate that a forward shafted engine has a slight weight benefit over an aft shafted engine for the LCTR2 vehicle. Although the aft shafted engines provide a more controlled and centered CG (between hover and cruise), the length of the long rotor shaft and complicated engine exhaust arrangement outweighed the potential benefits. A Multi-Disciplinary Analysis and Optimization (MDAO) approach for transmission sizing was also explored for this study. This tool offers quick analysis of gear loads, bearing lives, efficiencies, etc., through use of commercially available RomaxDESIGNER software. The goal was to create quick methods to explore various concept models. The output results from RomaxDESIGNER have been successfully linked to Boeing spreadsheets that generate gear tooth geometry in Catia 3D environment. Another initial goal was to link information from RomaxDESIGNER (such as hp, rpm, gear ratio) to populate Boeing's parametric weight spreadsheet and create an automated method to estimate drive system weight. This was only partially achieved due to the variety of weight models, number of manual inputs, and qualitative assessments required. A simplified weight spreadsheet was used with data inputs from RomaxDESIGNER along with manual inputs to perform rough weight calculations.

  5. 14 CFR 135.383 - Large transport category airplanes: Turbine engine powered: En route limitations: Two engines...

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 3 2014-01-01 2014-01-01 false Large transport category airplanes: Turbine... Limitations § 135.383 Large transport category airplanes: Turbine engine powered: En route limitations: Two...). No person may operate a turbine engine powered large transport category airplane along an...

  6. 14 CFR 135.383 - Large transport category airplanes: Turbine engine powered: En route limitations: Two engines...

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 3 2012-01-01 2012-01-01 false Large transport category airplanes: Turbine... Limitations § 135.383 Large transport category airplanes: Turbine engine powered: En route limitations: Two...). No person may operate a turbine engine powered large transport category airplane along an...

  7. 14 CFR 135.383 - Large transport category airplanes: Turbine engine powered: En route limitations: Two engines...

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Large transport category airplanes: Turbine... Limitations § 135.383 Large transport category airplanes: Turbine engine powered: En route limitations: Two...). No person may operate a turbine engine powered large transport category airplane along an...

  8. 14 CFR 135.383 - Large transport category airplanes: Turbine engine powered: En route limitations: Two engines...

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 3 2013-01-01 2013-01-01 false Large transport category airplanes: Turbine... Limitations § 135.383 Large transport category airplanes: Turbine engine powered: En route limitations: Two...). No person may operate a turbine engine powered large transport category airplane along an...

  9. 14 CFR 135.383 - Large transport category airplanes: Turbine engine powered: En route limitations: Two engines...

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 3 2011-01-01 2011-01-01 false Large transport category airplanes: Turbine... Limitations § 135.383 Large transport category airplanes: Turbine engine powered: En route limitations: Two...). No person may operate a turbine engine powered large transport category airplane along an...

  10. Magnetohydrodynamics (MHD) Engineering Test Facility (ETF) 200 MWe power plant Conceptual Design Engineering Report (CDER)

    NASA Technical Reports Server (NTRS)

    1981-01-01

    The reference conceptual design of the magnetohydrodynamic (MHD) Engineering Test Facility (ETF), a prototype 200 MWe coal-fired electric generating plant designed to demonstrate the commercial feasibility of open cycle MHD, is summarized. Main elements of the design, systems, and plant facilities are illustrated. System design descriptions are included for closed cycle cooling water, industrial gas systems, fuel oil, boiler flue gas, coal management, seed management, slag management, plant industrial waste, fire service water, oxidant supply, MHD power ventilating

  11. Magnetohydrodynamics (MHD) Engineering Test Facility (ETF) 200 MWe power plant Conceptual Design Engineering Report (CDER)

    NASA Astrophysics Data System (ADS)

    1981-09-01

    The reference conceptual design of the magnetohydrodynamic (MHD) Engineering Test Facility (ETF), a prototype 200 MWe coal-fired electric generating plant designed to demonstrate the commercial feasibility of open cycle MHD, is summarized. Main elements of the design, systems, and plant facilities are illustrated. System design descriptions are included for closed cycle cooling water, industrial gas systems, fuel oil, boiler flue gas, coal management, seed management, slag management, plant industrial waste, fire service water, oxidant supply, MHD power ventilating

  12. Magnetohydrodynamics (MHD) Engineering Test Facility (ETF) 200 MWe power plant. Conceptual Design Engineering Report (CDER). Volume 4: Supplementary engineering data

    NASA Technical Reports Server (NTRS)

    1981-01-01

    The reference conceptual design of the Magnetohydrodynamic Engineering Test Facility (ETF), a prototype 200 MWe coal-fired electric generating plant designed to demonstrate the commercial feasibility of open cycle MHD is summarized. Main elements of the design are identified and explained, and the rationale behind them is reviewed. Major systems and plant facilities are listed and discussed. Construction cost and schedule estimates, and identification of engineering issues that should be reexamined are also given. The latest (1980-1981) information from the MHD technology program are integrated with the elements of a conventional steam power electric generating plant. Supplementary Engineering Data (Issues, Background, Performance Assurance Plan, Design Details, System Design Descriptions and Related Drawings) is presented.

  13. Using Ontology Search Engines to support Users and Intelligent Systems solving a range of tasks

    NASA Astrophysics Data System (ADS)

    Sleeman, D.; Thomas, E.; Aiken, A.

    The paper describes several classes of tasks namely solving word problems, and classifying datasets using machine learning techniques, where the tasks may not be solvable because the information provided is incomplete. We explore the situation where one has a central concept and the missing information can either be a further descriptor / field of that concept or a (distantly) related concept. We describe how an ontology search engine has assisted in solving such problems, by summarizing the frequency of occurrence of descriptors found in a group of relevant ontologies, and by reporting which concepts are related to the central concept. The search engine used in this work has been ONTOSEARCH2. We further speculate about how such a "concept web" might be used to support the analysis and generation of natural language texts as well as spoken language.

  14. Crescendo: A Protein Sequence Database Search Engine for Tandem Mass Spectra.

    PubMed

    Wang, Jianqi; Zhang, Yajie; Yu, Yonghao

    2015-07-01

    A search engine that discovers more peptides reliably is essential to the progress of the computational proteomics. We propose two new scoring functions (L- and P-scores), which aim to capture similar characteristics of a peptide-spectrum match (PSM) as Sequest and Comet do. Crescendo, introduced here, is a software program that implements these two scores for peptide identification. We applied Crescendo to test datasets and compared its performance with widely used search engines, including Mascot, Sequest, and Comet. The results indicate that Crescendo identifies a similar or larger number of peptides at various predefined false discovery rates (FDR). Importantly, it also provides a better separation between the true and decoy PSMs, warranting the future development of a companion post-processing filtering algorithm. PMID:25895889

  15. Crescendo: A Protein Sequence Database Search Engine for Tandem Mass Spectra

    NASA Astrophysics Data System (ADS)

    Wang, Jianqi; Zhang, Yajie; Yu, Yonghao

    2015-07-01

    A search engine that discovers more peptides reliably is essential to the progress of the computational proteomics. We propose two new scoring functions (L- and P-scores), which aim to capture similar characteristics of a peptide-spectrum match (PSM) as Sequest and Comet do. Crescendo, introduced here, is a software program that implements these two scores for peptide identification. We applied Crescendo to test datasets and compared its performance with widely used search engines, including Mascot, Sequest, and Comet. The results indicate that Crescendo identifies a similar or larger number of peptides at various predefined false discovery rates (FDR). Importantly, it also provides a better separation between the true and decoy PSMs, warranting the future development of a companion post-processing filtering algorithm.

  16. Comparison of Four Search Engines and their efficacy With Emphasis on Literature Research in Addiction (Prevention and Treatment)

    PubMed Central

    Samadzadeh, Gholam Reza; Rigi, Tahereh; Ganjali, Ali Reza

    2013-01-01

    Background Surveying valuable and most recent information from internet, has become vital for researchers and scholars, because every day, thousands and perhaps millions of scientific works are brought out as digital resources which represented by internet and researchers can’t ignore this great resource to find related documents for their literature search, which may not be found in any library. With regard to variety of documents presented on the internet, search engines are one of the most effective search tools for finding information. Objectives The aim of this study is to evaluate the three criteria, recall, preciseness and importance of the four search engines which are PubMed, Science Direct, Google Scholar and federated search of Iranian National Medical Digital Library in addiction (prevention and treatment) to select the most effective search engine for offering the best literature research. Materials and Methods This research was a cross-sectional study by which four popular search engines in medical sciences were evaluated. To select keywords, medical subject heading (Mesh) was used. We entered given keywords in the search engines and after searching, 10 first entries were evaluated. Direct observation was used as a mean for data collection and they were analyzed by descriptive statistics (number, percent number and mean) and inferential statistics, One way analysis of variance (ANOVA) and post hoc Tukey in Spss. 15 statistical software. P Value < 0.05 was considered statistically significant. Results Results have shown that the search engines had different operations with regard to the evaluated criteria. Since P Value was 0.004 < 0.05 for preciseness and was 0.002 < 0.05 for importance, it shows significant difference among search engines. PubMed, Science Direct and Google Scholar were the best in recall, preciseness and importance respectively. Conclusions As literature research is one of the most important stages of research, it's better for researchers, especially Substance-Related Disorders scholars to use different search engines with the best recall, preciseness and importance in that subject field to reach desirable results while searching and they don’t depend on just one search engine. PMID:24971257

  17. 10 CFR Appendix S to Part 50 - Earthquake Engineering Criteria for Nuclear Power Plants

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ...2013-01-01 2013-01-01 false Earthquake Engineering Criteria for Nuclear Power...App. S Appendix S to Part 50—Earthquake Engineering Criteria for Nuclear Power...issued before January 10, 1997, the earthquake engineering criteria in Section...

  18. 10 CFR Appendix S to Part 50 - Earthquake Engineering Criteria for Nuclear Power Plants

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...2011-01-01 2011-01-01 false Earthquake Engineering Criteria for Nuclear Power...App. S Appendix S to Part 50—Earthquake Engineering Criteria for Nuclear Power...issued before January 10, 1997, the earthquake engineering criteria in Section...

  19. 10 CFR Appendix S to Part 50 - Earthquake Engineering Criteria for Nuclear Power Plants

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...2014-01-01 2014-01-01 false Earthquake Engineering Criteria for Nuclear Power...App. S Appendix S to Part 50—Earthquake Engineering Criteria for Nuclear Power...issued before January 10, 1997, the earthquake engineering criteria in Section...

  20. Novel electromagnetic structures for high-power dispersion engineering

    NASA Astrophysics Data System (ADS)

    Luginsland, John

    2010-11-01

    High power sources of coherent electromagnetic radiation have been an active area of research for decades, and have driven advances in directed energy, radar, and communications applications. At the highest levels of peak power, however, much of this research has been focused on oscillators driven by intense electron beams. One reason for this is the large amount of free energy associated with the space-charge of these intense beams provides ample means to drive an amplifier into self-oscillation. Recent advances in metamaterials, transformation optics, and photonic band gap structures have the potential to dramatically increase our capability to engineering the electromagnetic properties of the circuit, provide greater control of the beam-wave interaction, and offer new avenues to reach high power amplification. A notable challenge with this concept, however, is the capability of these structures to handle an intense RF and DC environment while retaining their physical integrity and electromagnetic properties. These challenges include electrical breakdown of the structures, AC and DC beam-loading, and melting due to losses in the configurations. Fundamental study of the physics of high-power sources based on metamaterials is needed to realize the potential of these advanced electromagnetic geometries.

  1. GoWeb: a semantic search engine for the life science web

    PubMed Central

    Dietze, Heiko; Schroeder, Michael

    2009-01-01

    Background Current search engines are keyword-based. Semantic technologies promise a next generation of semantic search engines, which will be able to answer questions. Current approaches either apply natural language processing to unstructured text or they assume the existence of structured statements over which they can reason. Results Here, we introduce a third approach, GoWeb, which combines classical keyword-based Web search with text-mining and ontologies to navigate large results sets and facilitate question answering. We evaluate GoWeb on three benchmarks of questions on genes and functions, on symptoms and diseases, and on proteins and diseases. The first benchmark is based on the BioCreAtivE 1 Task 2 and links 457 gene names with 1352 functions. GoWeb finds 58% of the functional GeneOntology annotations. The second benchmark is based on 26 case reports and links symptoms with diseases. GoWeb achieves 77% success rate improving an existing approach by nearly 20%. The third benchmark is based on 28 questions in the TREC genomics challenge and links proteins to diseases. GoWeb achieves a success rate of 79%. Conclusion GoWeb's combination of classical Web search with text-mining and ontologies is a first step towards answering questions in the biomedical domain. GoWeb is online at: PMID:19796404

  2. Search Engines and Expertise about Global Issues: Well-defined Landscape or Undomesticated Wilderness?

    NASA Astrophysics Data System (ADS)

    Fry, J.; Virkar, S.; Schroeder, R.

    This chapter investigates the `winner-takes-all' hypothesis in relation to how academic researchers access online sources and resources. Some have argued that the Web provides access to a wider range of sources of information than offline resources. Others, such as Hindman et al. (2003), have shown that access to online resources is highly concentrated, particularly because of how Internet search engines are designed. With researchers increasingly using the Web and Internet search engines to disseminate and locate information and expertise, the question of whether the use of online resources enhances or diminishes the range of available sources of expertise is bound to become more pressing. To address this question four globally relevant knowledge domains were investigated using large-scale link analysis and a series of semi-structured interviews with UK-based academic researchers. We found there to be no uniform `winner-takes-all' effect in the use of online resources. Instead, there were different types of information gatekeepers for the four domains we examined and for the types of resources and sources that are sought. Particular characteristics of a knowledge domain's information environment appear to determine whether Google and other Internet search engines function as a facilitator in accessing expertise or as an influential gatekeeper.

  3. 49 CFR 176.905 - Motor vehicles or mechanical equipment powered by internal combustion engines.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... internal combustion engines. 176.905 Section 176.905 Transportation Other Regulations Relating to... engines. (a) A motor vehicle or any mechanized equipment powered by an internal combustion engine is... met: (1) The motor vehicle or mechanical equipment has an internal combustion engine using liquid...

  4. Development of a Google-based search engine for data mining radiology reports.

    PubMed

    Erinjeri, Joseph P; Picus, Daniel; Prior, Fred W; Rubin, David A; Koppel, Paul

    2009-08-01

    The aim of this study is to develop a secure, Google-based data-mining tool for radiology reports using free and open source technologies and to explore its use within an academic radiology department. A Health Insurance Portability and Accountability Act (HIPAA)-compliant data repository, search engine and user interface were created to facilitate treatment, operations, and reviews preparatory to research. The Institutional Review Board waived review of the project, and informed consent was not required. Comprising 7.9 GB of disk space, 2.9 million text reports were downloaded from our radiology information system to a fileserver. Extensible markup language (XML) representations of the reports were indexed using Google Desktop Enterprise search engine software. A hypertext markup language (HTML) form allowed users to submit queries to Google Desktop, and Google's XML response was interpreted by a practical extraction and report language (PERL) script, presenting ranked results in a web browser window. The query, reason for search, results, and documents visited were logged to maintain HIPAA compliance. Indexing averaged approximately 25,000 reports per hour. Keyword search of a common term like "pneumothorax" yielded the first ten most relevant results of 705,550 total results in 1.36 s. Keyword search of a rare term like "hemangioendothelioma" yielded the first ten most relevant results of 167 total results in 0.23 s; retrieval of all 167 results took 0.26 s. Data mining tools for radiology reports will improve the productivity of academic radiologists in clinical, educational, research, and administrative tasks. By leveraging existing knowledge of Google's interface, radiologists can quickly perform useful searches. PMID:18392657

  5. Wind power. (Latest citations from the NTIS database). Published Search

    SciTech Connect

    Not Available

    1993-04-01

    The bibliography contains citations concerning the generation of electrical power by the wind. Topics include selecting the site of wind power plants, the effect of turbulence on power output of wind energy converters, effects of dynamics of wind power plants on the design and operating behavior, optimized design of wind turbines with rotary pump, and use of wind energy in Third World countries. Also included are possibilities, restrictions, and limits of using wind pumps, negotiations in energy policy, control concepts for wind energy plants, speed control of wind turbines, and selected economic questions using the example of wind power plants. (Contains a minimum of 125 citations and includes a subject term index and title list.)

  6. Power supply circuit for an ion engine sequentially operated power inverters

    NASA Technical Reports Server (NTRS)

    Cardwell, Jr., Gilbert I. (Inventor)

    2000-01-01

    A power supply circuit for an ion engine suitable for a spacecraft has a voltage bus having input line and a return line. The power supply circuit includes a pulse width modulation circuit. A plurality of bridge inverter circuits is coupled to the bus and the pulse width modulation circuit. The pulse width modulation circuit generates operating signals having a variable duty cycle. Each bridge inverter has a primary winding and a secondary winding. Each secondary winding is coupled to a rectifier bridge. Each secondary winding is coupled in series with another of the plurality of rectifier bridges.

  7. Marine fuels. (Latest citations from Information Services in Mechanical Engineering database). Published Search

    SciTech Connect

    Not Available

    1993-07-01

    The bibliography contains citations concerning research and experimentation, fuel system design, future demands, contrast and comparisons, and applications of various marine engine fuels and lubricants. Residual fuel oils, coal powered steam propulsion, homogenizing and treating fuels, coal liquefication, diesel fuel power, electrical power, gas turbines, waste exhaust heat-energy recovery systems, exhaust emissions, water-emulsified fuels, conservation, and nuclear fuels are among the topics discussed. Developments in fuels and their effects on power plant wear are included. (Contains 250 citations and includes a subject term index and title list.)

  8. Knowledge-based personalized search engine for the Web-based Human Musculoskeletal System Resources (HMSR) in biomechanics.

    PubMed

    Dao, Tien Tuan; Hoang, Tuan Nha; Ta, Xuan Hien; Tho, Marie Christine Ho Ba

    2013-02-01

    Human musculoskeletal system resources of the human body are valuable for the learning and medical purposes. Internet-based information from conventional search engines such as Google or Yahoo cannot response to the need of useful, accurate, reliable and good-quality human musculoskeletal resources related to medical processes, pathological knowledge and practical expertise. In this present work, an advanced knowledge-based personalized search engine was developed. Our search engine was based on a client-server multi-layer multi-agent architecture and the principle of semantic web services to acquire dynamically accurate and reliable HMSR information by a semantic processing and visualization approach. A security-enhanced mechanism was applied to protect the medical information. A multi-agent crawler was implemented to develop a content-based database of HMSR information. A new semantic-based PageRank score with related mathematical formulas were also defined and implemented. As the results, semantic web service descriptions were presented in OWL, WSDL and OWL-S formats. Operational scenarios with related web-based interfaces for personal computers and mobile devices were presented and analyzed. Functional comparison between our knowledge-based search engine, a conventional search engine and a semantic search engine showed the originality and the robustness of our knowledge-based personalized search engine. In fact, our knowledge-based personalized search engine allows different users such as orthopedic patient and experts or healthcare system managers or medical students to access remotely into useful, accurate, reliable and good-quality HMSR information for their learning and medical purposes. PMID:23149160

  9. Towards a portal and search engine to facilitate academic and research collaboration in engineering and education

    NASA Astrophysics Data System (ADS)

    Bonilla Villarreal, Isaura Nathaly

    While international academic and research collaborations are of great importance at this time, it is not easy to find researchers in the engineering field that publish in languages other than English. Because of this disconnect, there exists a need for a portal to find Who's Who in Engineering Education in the Americas. The objective of this thesis is to built an object-oriented architecture for this proposed portal. The Unified Modeling Language (UML) model developed in this thesis incorporates the basic structure of a social network for academic purposes. Reverse engineering of three social networks portals yielded important aspects of their structures that have been incorporated in the proposed UML model. Furthermore, the present work includes a pattern for academic social networks..

  10. 14 CFR 125.377 - Fuel supply: Turbine-engine-powered airplanes other than turbopropeller.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...2012-01-01 false Fuel supply: Turbine-engine-powered airplanes other than...Release Rules § 125.377 Fuel supply: Turbine-engine-powered airplanes other than...person may release for flight or takeoff a turbine-powered airplane (other than a...

  11. 14 CFR 125.377 - Fuel supply: Turbine-engine-powered airplanes other than turbopropeller.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...2014-01-01 false Fuel supply: Turbine-engine-powered airplanes other than...Release Rules § 125.377 Fuel supply: Turbine-engine-powered airplanes other than...person may release for flight or takeoff a turbine-powered airplane (other than a...

  12. 14 CFR 125.377 - Fuel supply: Turbine-engine-powered airplanes other than turbopropeller.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ...2013-01-01 false Fuel supply: Turbine-engine-powered airplanes other than...Release Rules § 125.377 Fuel supply: Turbine-engine-powered airplanes other than...person may release for flight or takeoff a turbine-powered airplane (other than a...

  13. 14 CFR 125.377 - Fuel supply: Turbine-engine-powered airplanes other than turbopropeller.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...2011-01-01 false Fuel supply: Turbine-engine-powered airplanes other than...Release Rules § 125.377 Fuel supply: Turbine-engine-powered airplanes other than...person may release for flight or takeoff a turbine-powered airplane (other than a...

  14. 14 CFR 125.377 - Fuel supply: Turbine-engine-powered airplanes other than turbopropeller.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...2010-01-01 false Fuel supply: Turbine-engine-powered airplanes other than...Release Rules § 125.377 Fuel supply: Turbine-engine-powered airplanes other than...person may release for flight or takeoff a turbine-powered airplane (other than a...

  15. 14 CFR 33.8 - Selection of engine power and thrust ratings.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...2010-01-01 2010-01-01 false Selection of engine power and thrust ratings. 33.8 Section...ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT AIRWORTHINESS STANDARDS: AIRCRAFT ENGINES General § 33.8 Selection of...

  16. 14 CFR 33.8 - Selection of engine power and thrust ratings.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...2011-01-01 2011-01-01 false Selection of engine power and thrust ratings. 33.8 Section...ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT AIRWORTHINESS STANDARDS: AIRCRAFT ENGINES General § 33.8 Selection of...

  17. Search and rescue in collapsed structures: engineering and social science aspects.

    PubMed

    El-Tawil, Sherif; Aguirre, Benigno

    2010-10-01

    This paper discusses the social science and engineering dimensions of search and rescue (SAR) in collapsed buildings. First, existing information is presented on factors that influence the behaviour of trapped victims, particularly human, physical, socioeconomic and circumstantial factors. Trapped victims are most often discussed in the context of structural collapse and injuries sustained. Most studies in this area focus on earthquakes as the type of disaster that produces the most extensive structural damage. Second, information is set out on the engineering aspects of urban search and rescue (USAR) in the United States, including the role of structural engineers in USAR operations, training and certification of structural specialists, and safety and general procedures. The use of computational simulation to link the engineering and social science aspects of USAR is discussed. This could supplement training of local SAR groups and USAR teams, allowing them to understand better the collapse process and how voids form in a rubble pile. A preliminary simulation tool developed for this purpose is described. PMID:20618383

  18. Seasonal trends in tinnitus symptomatology: evidence from Internet search engine query data.

    PubMed

    Plante, David T; Ingram, David G

    2015-10-01

    The primary aim of this study was to test the hypothesis that the symptom of tinnitus demonstrates a seasonal pattern with worsening in the winter relative to the summer using Internet search engine query data. Normalized search volume for the term 'tinnitus' from January 2004 through December 2013 was retrieved from Google Trends. Seasonal effects were evaluated using cosinor regression models. Primary countries of interest were the United States and Australia. Secondary exploratory analyses were also performed using data from Germany, the United Kingdom, Canada, Sweden, and Switzerland. Significant seasonal effects for 'tinnitus' search queries were found in the United States and Australia (p < 0.00001 for both countries), with peaks in the winter and troughs in the summer. Secondary analyses demonstrated similarly significant seasonal effects for Germany (p < 0.00001), Canada (p < 0.00001), and Sweden (p = 0.0008), again with increased search volume in the winter relative to the summer. Our findings indicate that there are significant seasonal trends for Internet search queries for tinnitus, with a zenith in winter months. Further research is indicated to determine the biological mechanisms underlying these findings, as they may provide insights into the pathophysiology of this common and debilitating medical symptom. PMID:25234771

  19. Is It "Writing on Water" or "Strike It Rich?" The Experiences of Prospective Teachers in Using Search Engines

    ERIC Educational Resources Information Center

    Sahin, Abdurrahman; Cermik, Hulya; Dogan, Birsen

    2010-01-01

    Information searching skills have become increasingly important for prospective teachers with the exponential growth of learning materials on the web. This study is an attempt to understand the experiences of prospective teachers with search engines through metaphoric images and to further investigate whether their experiences are related to the…

  20. Power sources for search and rescue 406 MHz beacons

    NASA Technical Reports Server (NTRS)

    Attia, Alan I.; Perrone, David E.

    1987-01-01

    The results of a study directed at the selection of a commercially available, safe, low cost, light weight and long storage life battery for search and rescue (Sarsat) 406 MHz emergency beacons are presented. In the course of this work, five electrochemical systems (lithium-manganese dioxide, lithium-carbon monofluoride, lithium-silver vanadium oxide, alkaline cells, and cadmium-mercuric oxide) were selected for limited experimental studies to determine their suitability for this application. Two safe, commercially available batteries (lithium-manganese dioxide and lithium-carbon monofluoride) which meet the near term requirements and several alternatives for the long term were identified.

  1. Performance of the NEXT Engineering Model Power Processing Unit

    NASA Technical Reports Server (NTRS)

    Pinero, Luis R.; Hopson, Mark; Todd, Philip C.; Wong, Brian

    2007-01-01

    The NASA s Evolutionary Xenon Thruster (NEXT) project is developing an advanced ion propulsion system for future NASA missions for solar system exploration. An engineering model (EM) power processing unit (PPU) for the NEXT project was designed and fabricated by L-3 Communications under contract with NASA Glenn Research Center (GRC). This modular PPU is capable of processing up from 0.5 to 7.0 kW of output power for the NEXT ion thruster. Its design includes many significant improvements for better performance over the state-of-the-art PPU. The most significant difference is the beam supply which is comprised of six modules and capable of very efficient operation through a wide voltage range because of innovative features like dual controls, module addressing, and a high current mode. The low voltage power supplies are based on elements of the previously validated NASA Solar Electric Propulsion Technology Application Readiness (NSTAR) PPU. The highly modular construction of the PPU resulted in improved manufacturability, simpler scalability, and lower cost. This paper describes the design of the EM PPU and the results of the bench-top performance tests.

  2. Impact of Commercial Search Engines and International Databases on Engineering Teaching and Research

    ERIC Educational Resources Information Center

    Chanson, Hubert

    2007-01-01

    For the last three decades, the engineering higher education and professional environments have been completely transformed by the "electronic/digital information revolution" that has included the introduction of personal computer, the development of email and world wide web, and broadband Internet connections at home. Herein the writer compares…

  3. Ceramics in engine components. (Latest citations from Engineered Materials Abstracts). NewSearch

    SciTech Connect

    Not Available

    1994-10-01

    The bibliography contains citations concerning the application of ceramics in automotive and aerospace engine components. Mechanical properties are reviewed. The citations examine techniques for joining dissimilar materials, advantages and problems associated with substitutions of ceramics in lieu of metals, and types and methods of ceramic coatings. (Contains 250 citations and includes a subject term index and title list.)

  4. A Virtual Engineering Framework for Simulating Advanced Power System

    SciTech Connect

    Mike Bockelie; Dave Swensen; Martin Denison; Stanislav Borodai

    2008-06-18

    In this report is described the work effort performed to provide NETL with VE-Suite based Virtual Engineering software and enhanced equipment models to support NETL's Advanced Process Engineering Co-simulation (APECS) framework for advanced power generation systems. Enhancements to the software framework facilitated an important link between APECS and the virtual engineering capabilities provided by VE-Suite (e.g., equipment and process visualization, information assimilation). Model enhancements focused on improving predictions for the performance of entrained flow coal gasifiers and important auxiliary equipment (e.g., Air Separation Units) used in coal gasification systems. In addition, a Reduced Order Model generation tool and software to provide a coupling between APECS/AspenPlus and the GE GateCycle simulation system were developed. CAPE-Open model interfaces were employed where needed. The improved simulation capability is demonstrated on selected test problems. As part of the project an Advisory Panel was formed to provide guidance on the issues on which to focus the work effort. The Advisory Panel included experts from industry and academics in gasification, CO2 capture issues, process simulation and representatives from technology developers and the electric utility industry. To optimize the benefit to NETL, REI coordinated its efforts with NETL and NETL funded projects at Iowa State University, Carnegie Mellon University and ANSYS/Fluent, Inc. The improved simulation capabilities incorporated into APECS will enable researchers and engineers to better understand the interactions of different equipment components, identify weaknesses and processes needing improvement and thereby allow more efficient, less expensive plants to be developed and brought on-line faster and in a more cost-effective manner. These enhancements to APECS represent an important step toward having a fully integrated environment for performing plant simulation and engineering. Furthermore, with little effort the modeling capabilities described in this report can be extended to support other DOE programs, such as ultra super critical boiler development, oxy-combustion boiler development or modifications to existing plants to include CO2 capture and sequestration.

  5. Thermal energy storage for the Stirling engine powered automobile

    NASA Technical Reports Server (NTRS)

    Morgan, D. T. (editor)

    1979-01-01

    A thermal energy storage (TES) system developed for use with the Stirling engine as an automotive power system has gravimetric and volumetric storage densities which are competitive with electric battery storage systems, meets all operational requirements for a practical vehicle, and can be packaged in compact sized automobiles with minimum impact on passenger and freight volume. The TES/Stirling system is the only storage approach for direct use of combustion heat from fuel sources not suitable for direct transport and use on the vehicle. The particular concept described is also useful for a dual mode TES/liquid fuel system in which the TES (recharged from an external energy source) is used for short duration trips (approximately 10 miles or less) and liquid fuel carried on board the vehicle used for long duration trips. The dual mode approach offers the potential of 50 percent savings in the consumption of premium liquid fuels for automotive propulsion in the United States.

  6. High temperature solar photon engines. [heat engines for terrestrial and space-based solar power plants

    NASA Technical Reports Server (NTRS)

    Hertzberg, A.; Decher, R.; Mattick, A. T.; Lau, C. V.

    1978-01-01

    High temperature heat engines designed to make maximum use of the thermodynamic potential of concentrated solar radiation are described. Plasmas between 2000 K and 4000 K can be achieved by volumetric absorption of radiation in alkali metal vapors, leading to thermal efficiencies up to 75% for terrestrial solar power plants and up to 50% for space power plants. Two machines capable of expanding hot plasmas using practical technology are discussed. A binary Rankine cycle uses fluid mechanical energy transfer in a device known as the 'Comprex' or 'energy exchanger.' The second machine utilizes magnetohydrodynamics in a Brayton cycle for space applications. Absorption of solar energy and plasma radiation losses are investigated for a solar superheater using potassium vapor.

  7. GoEarth - performance and challenges of a semantic search engine for CCS literature

    NASA Astrophysics Data System (ADS)

    Gutknecht, B. D.; Alvers, M. R.

    2012-04-01

    Increased interests in climate sciences have led to exponentially increasing publication numbers regarding Carbon Capture and Storage (CCS). In order to be able to handle this overload of information, an ontology-based, semantic search system was developed. The used ontology was especially designed for geo-scientific content in CCS-literature. The semantic search engine provides users with an infrastructure that semantically categorizes textual content by facilitating natural language processing for the knowledge domain of CCS. The system works fully automated. So even search without keywords becomes possible and documents can be identified by navigating the ontology which is rendered as a tree on the left hand side of the search results. Furthermore, meta-data analysis provides useful statistical information, e.g. about author networks. Compared to the 1045 AGU index terms and the 3587 GeoRef thesaurus terms, the new CCS ontology (1170 concepts and synonyms) links to 11.0 % and 8.6 % more documents of a geo-scientific text corpus, respectively. Of all test documents, the CCS ontology hits 96.5 % (GeoRef: 88.9 %, AGU index terms: 87.1 %). We will discuss existing challenges like disambiguation of concepts and intelligent text mining.

  8. Component improvement of free-piston Stirling engine key technology for space power

    NASA Technical Reports Server (NTRS)

    Alger, Donald L.

    1988-01-01

    The successful performance of the 25 kW Space Power Demonstrator (SPD) engine during an extensive testing period has provided a baseline of free piston Stirling engine technology from which future space Stirling engines may evolve. Much of the success of the engine was due to the initial careful selection of engine materials, fabrication and joining processes, and inspection procedures. Resolution of the few SPD engine problem areas that did occur has resulted in the technological advancement of certain key free piston Stirling engine components. Derivation of two half-SPD, single piston engines from the axially opposed piston SPD engine, designated as Space Power Research (SPR) engines, has made possible the continued improvement of these engine components. The two SPR engines serve as test bed engines for testing of engine components. Some important fabrication and joining processes are reviewed. Also, some component deficiencies that were discovered during SPD engine testing are described and approaches that were taken to correct these deficiencies are discussed. Potential component design modifications, based upon the SPD and SPR engine testing, are also reported.

  9. PARALIGN: rapid and sensitive sequence similarity searches powered by parallel computing technology.

    PubMed

    Saebø, Per Eystein; Andersen, Sten Morten; Myrseth, Jon; Laerdahl, Jon K; Rognes, Torbjørn

    2005-07-01

    PARALIGN is a rapid and sensitive similarity search tool for the identification of distantly related sequences in both nucleotide and amino acid sequence databases. Two algorithms are implemented, accelerated Smith-Waterman and ParAlign. The ParAlign algorithm is similar to Smith-Waterman in sensitivity, while as quick as BLAST for protein searches. A form of parallel computing technology known as multimedia technology that is available in modern processors, but rarely used by other bioinformatics software, has been exploited to achieve the high speed. The software is also designed to run efficiently on computer clusters using the message-passing interface standard. A public search service powered by a large computer cluster has been set-up and is freely available at www.paralign.org, where the major public databases can be searched. The software can also be downloaded free of charge for academic use. PMID:15980529

  10. Differential Evolution Based Intelligent System State Search Method for Composite Power System Reliability Evaluation

    NASA Astrophysics Data System (ADS)

    Bakkiyaraj, Ashok; Kumarappan, N.

    2015-09-01

    This paper presents a new approach for evaluating the reliability indices of a composite power system that adopts binary differential evolution (BDE) algorithm in the search mechanism to select the system states. These states also called dominant states, have large state probability and higher loss of load curtailment necessary to maintain real power balance. A chromosome of a BDE algorithm represents the system state. BDE is not applied for its traditional application of optimizing a non-linear objective function, but used as tool for exploring more number of dominant states by producing new chromosomes, mutant vectors and trail vectors based on the fitness function. The searched system states are used to evaluate annualized system and load point reliability indices. The proposed search methodology is applied to RBTS and IEEE-RTS test systems and results are compared with other approaches. This approach evaluates the indices similar to existing methods while analyzing less number of system states.

  11. DY IQX: A ovel Meta-Search Engine for the Web Jianhan Zhu, Dawei Song, Marc Eisenstadt, Cristi Barladeanu, Stefan Rger

    E-print Network

    Zhu, Jianhan

    . Introduction and Motivation Large search engines such as Google have achieved tremendous success in recent will provide much better search services than Google). We think that the key for successful domain specific the availability of metadata in search services such as PubMed, Google Scholar, Google Image Search, and Google

  12. Self-evaluation in Advanced Power Searching and Mapping with Google MOOCs

    E-print Network

    Cortes, Corinna

    Self-evaluation in Advanced Power Searching and Mapping with Google MOOCs Julia Wilkowski Google 1600 Amphitheatre Parkway Mountain View, CA 94304 Wilkowski@Google.com Daniel M. Russell Google 1600 Amphitheatre Parkway Mountain View, CA 94304 DRussell@Google.com Amit Deutsch Google 1600 Amphitheatre Parkway

  13. A Two-Level Cache for Distributed Information Retrieval in Search Engines

    PubMed Central

    Zhang, Weizhe; He, Hui; Ye, Jianwei

    2013-01-01

    To improve the performance of distributed information retrieval in search engines, we propose a two-level cache structure based on the queries of the users' logs. We extract the highest rank queries of users from the static cache, in which the queries are the most popular. We adopt the dynamic cache as an auxiliary to optimize the distribution of the cache data. We propose a distribution strategy of the cache data. The experiments prove that the hit rate, the efficiency, and the time consumption of the two-level cache have advantages compared with other structures of cache. PMID:24363621

  14. A two-level cache for distributed information retrieval in search engines.

    PubMed

    Zhang, Weizhe; He, Hui; Ye, Jianwei

    2013-01-01

    To improve the performance of distributed information retrieval in search engines, we propose a two-level cache structure based on the queries of the users' logs. We extract the highest rank queries of users from the static cache, in which the queries are the most popular. We adopt the dynamic cache as an auxiliary to optimize the distribution of the cache data. We propose a distribution strategy of the cache data. The experiments prove that the hit rate, the efficiency, and the time consumption of the two-level cache have advantages compared with other structures of cache. PMID:24363621

  15. SYSTEM PERFORMANCE OF A STIRLING ENGINE POWERED HEAT ACTIVATED HEAT PUMP

    E-print Network

    Oak Ridge National Laboratory

    AUG 1979 SYSTEM PERFORMANCE OF A STIRLING ENGINE POWERED HEAT ACTIVATED HEAT PUMP W. D. Richards W of the subsystem compo- nents, especially between the free piston Stirling engine and the free piston linear),* and a decision was made to proceed with the Prototype Development. Superiority of a Stirling engine over other

  16. Fusion Engineering and Design 45 (1999) 145167 Exploring novel high power density concepts for attractive

    E-print Network

    Abdou, Mohamed

    1999-01-01

    Fusion Engineering and Design 45 (1999) 145­167 Exploring novel high power density concepts for attractive fusion systems Mohamed A. Abdou *, The APEX Team Mechanical and Aerospace Engineering Department, Uni6ersity of California Los Angeles, 44-114 Engineering IV, Los Angeles, CA 90095, USA Received 5

  17. Power Product Equipment Technician: Outboard-Engine Systems and Service. Teacher Edition [and] Student Edition.

    ERIC Educational Resources Information Center

    Hilley, Robert

    This curriculum guide contains teacher and student materials for a course on outboard-engine boat systems and service for power product equipment technician occupations. The course contains the following four units of instruction: (1) Outboard-Engine Design and Identification; (2) Operation and Service of Engine-Support Systems; (3) Operation and…

  18. 14 CFR 33.96 - Engine tests in auxiliary power unit (APU) mode.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 1 2013-01-01 2013-01-01 false Engine tests in auxiliary power unit (APU) mode. 33.96 Section 33.96 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT AIRWORTHINESS STANDARDS: AIRCRAFT ENGINES Block Tests; Turbine Aircraft Engines §...

  19. 14 CFR 33.96 - Engine tests in auxiliary power unit (APU) mode.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 1 2011-01-01 2011-01-01 false Engine tests in auxiliary power unit (APU) mode. 33.96 Section 33.96 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT AIRWORTHINESS STANDARDS: AIRCRAFT ENGINES Block Tests; Turbine Aircraft Engines §...

  20. 14 CFR 33.96 - Engine tests in auxiliary power unit (APU) mode.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 1 2014-01-01 2014-01-01 false Engine tests in auxiliary power unit (APU) mode. 33.96 Section 33.96 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT AIRWORTHINESS STANDARDS: AIRCRAFT ENGINES Block Tests; Turbine Aircraft Engines §...

  1. Power Hardware-in-the-loop Simulation of a Gas Engine Cogeneration System for Developing a Power Converter System

    NASA Astrophysics Data System (ADS)

    Hong, Miao; Horie, Satoshi; Miura, Yushi; Ise, Tosifumi; Sato, Yuki; Momose, Toshinari; Dufour, Christian

    This research focuses on the development scheme of a power converter in a gas engine cogeneration system using a power hardware-in-the-loop simulation. A matrix converter is adopted to substitute a conventional ac/dc/ac converter and transfers three phase electricity to single phase electricity directly. To inevstigate the interaction between gas engine-generator unit and the proposed matrix converter, a power hardware-in-the-loop simulation is carried out, in which a piece of real matrix converter is installed in the simulation loop and interfaces with the numerical model of gas engine-generator unit. Numerical models of gas engine and generator are presented and verified by experiment. The configuration of the power hardware-in-the-loop simulation is described and results are also presented, through which the practical application of matrix converter is well demonstrated.

  2. Aero-engine derivative gas turbines for power generation: Thermodynamic and economic perspectives

    SciTech Connect

    Horlock, J.H.

    1997-01-01

    Aero-engine technology has played a major part in the development of both the industrial gas turbine and, more recently, the combined cycle gas turbine (CCGT) plant. A distinction may be drawn between the direct use of developed aero-engine hardware in power generation (and in marine applications), and the more indirect influence of aero-engine technology, particularly in design of heavy-duty gas turbines. Both the direct use of aero-engine hardware, in gas turbines for power generation, and the indirect influence of aero-engine technology, in the design of more conventional heavy-duty plants (including combined cycle gas turbines, CCGTs), are reviewed.

  3. 14 CFR 121.185 - Airplanes: Reciprocating engine-powered: Landing limitations: Destination airport.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 3 2011-01-01 2011-01-01 false Airplanes: Reciprocating engine-powered...: CERTIFICATION AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.185 Airplanes: Reciprocating engine-powered: Landing...

  4. 14 CFR 23.1047 - Cooling test procedures for reciprocating engine powered airplanes.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... engine powered airplanes. 23.1047 Section 23.1047 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION... CATEGORY AIRPLANES Powerplant Cooling § 23.1047 Cooling test procedures for reciprocating engine powered airplanes. Compliance with § 23.1041 must be shown for the climb (or, for multiengine airplanes...

  5. 14 CFR 121.185 - Airplanes: Reciprocating engine-powered: Landing limitations: Destination airport.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 3 2014-01-01 2014-01-01 false Airplanes: Reciprocating engine-powered...: CERTIFICATION AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.185 Airplanes: Reciprocating engine-powered: Landing...

  6. 14 CFR 121.197 - Airplanes: Turbine engine powered: Landing limitations: Alternate airports.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Airplanes: Turbine engine powered: Landing... AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.197 Airplanes: Turbine engine powered: Landing limitations:...

  7. 14 CFR 121.175 - Airplanes: Reciprocating engine-powered: Weight limitations.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 3 2014-01-01 2014-01-01 false Airplanes: Reciprocating engine-powered... AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.175 Airplanes: Reciprocating engine-powered: Weight limitations....

  8. 14 CFR 121.189 - Airplanes: Turbine engine powered: Takeoff limitations.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 3 2014-01-01 2014-01-01 false Airplanes: Turbine engine powered: Takeoff... OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.189 Airplanes: Turbine engine powered: Takeoff limitations. (a) No person operating...

  9. 14 CFR 121.177 - Airplanes: Reciprocating engine-powered: Takeoff limitations.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 3 2014-01-01 2014-01-01 false Airplanes: Reciprocating engine-powered... AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.177 Airplanes: Reciprocating engine-powered: Takeoff limitations....

  10. 14 CFR 121.187 - Airplanes: Reciprocating engine-powered: Landing limitations: Alternate airport.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 3 2013-01-01 2013-01-01 false Airplanes: Reciprocating engine-powered...: CERTIFICATION AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.187 Airplanes: Reciprocating engine-powered: Landing...

  11. 14 CFR 121.197 - Airplanes: Turbine engine powered: Landing limitations: Alternate airports.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 3 2011-01-01 2011-01-01 false Airplanes: Turbine engine powered: Landing... AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.197 Airplanes: Turbine engine powered: Landing limitations:...

  12. 14 CFR 121.187 - Airplanes: Reciprocating engine-powered: Landing limitations: Alternate airport.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 3 2012-01-01 2012-01-01 false Airplanes: Reciprocating engine-powered...: CERTIFICATION AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.187 Airplanes: Reciprocating engine-powered: Landing...

  13. 14 CFR 121.195 - Airplanes: Turbine engine powered: Landing limitations: Destination airports.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 3 2014-01-01 2014-01-01 false Airplanes: Turbine engine powered: Landing...: CERTIFICATION AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.195 Airplanes: Turbine engine powered: Landing...

  14. 14 CFR 121.195 - Airplanes: Turbine engine powered: Landing limitations: Destination airports.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 3 2011-01-01 2011-01-01 false Airplanes: Turbine engine powered: Landing...: CERTIFICATION AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.195 Airplanes: Turbine engine powered: Landing...

  15. 14 CFR 121.195 - Airplanes: Turbine engine powered: Landing limitations: Destination airports.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Airplanes: Turbine engine powered: Landing...: CERTIFICATION AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.195 Airplanes: Turbine engine powered: Landing...

  16. 14 CFR 23.1047 - Cooling test procedures for reciprocating engine powered airplanes.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... engine powered airplanes. 23.1047 Section 23.1047 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION... CATEGORY AIRPLANES Powerplant Cooling § 23.1047 Cooling test procedures for reciprocating engine powered airplanes. Compliance with § 23.1041 must be shown for the climb (or, for multiengine airplanes...

  17. 14 CFR 121.197 - Airplanes: Turbine engine powered: Landing limitations: Alternate airports.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 3 2013-01-01 2013-01-01 false Airplanes: Turbine engine powered: Landing... AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.197 Airplanes: Turbine engine powered: Landing limitations:...

  18. 14 CFR 121.189 - Airplanes: Turbine engine powered: Takeoff limitations.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 3 2012-01-01 2012-01-01 false Airplanes: Turbine engine powered: Takeoff... OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.189 Airplanes: Turbine engine powered: Takeoff limitations. (a) No person operating...

  19. 14 CFR 121.175 - Airplanes: Reciprocating engine-powered: Weight limitations.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Airplanes: Reciprocating engine-powered... AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.175 Airplanes: Reciprocating engine-powered: Weight limitations....

  20. 14 CFR 121.175 - Airplanes: Reciprocating engine-powered: Weight limitations.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 3 2012-01-01 2012-01-01 false Airplanes: Reciprocating engine-powered... AND OPERATIONS OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS Airplane Performance Operating Limitations § 121.175 Airplanes: Reciprocating engine-powered: Weight limitations....