WorldWideScience

Sample records for based field research

  1. Lamont-Doherty's Secondary School Field Research Program: 10 years of field research-based education.

    Science.gov (United States)

    Newton, R.; Vincent, S.; Gribbin, S.; Peteet, D. M.; Sambrotto, R.; Bostick, B. C.; Corbett, E.; Nguyen, K.; Bjornton, J.; Lee, D.; Dubossi, D.; Reyes, N.

    2014-12-01

    This fall marks the 10th year in which we have run a research-project-based educational program for high school students and science teachers at the Lamont-Doherty Earth Observatory. This summer's cohort included 31 teenagers, 7 science teachers, and 16 college students, most of whom are returning to the program to help run the research projects. Nearly all of our students attend non-competitive-entry public schools in NYC or the neighborhoods around the Observatory. Over 80% are from under-served minority populations. Most receive Title I/III assistance. About 60% are young women. During the past 10 years, nearly all of our participants have gone on to 4-year colleges. About half are declaring science and engineering majors. Our students receive scholarship support at rates several times higher than their graduating peers, including 5 Gates Millennium scholars over the past 5 years. Our science is centered on studies of a nearby tidal wetland, where we have expanded from fish collections in year one to include everything from sediment core analysis to soil chemistry to nutrient cycles to the local food web. In this presentation we will look back over 10 years of experience and focus on what lessons can be learned about (1) how to engage teams of young investigators in authentic scientific research; (2) what cultural/organizational structures encourage them to make use of place- and project-based learning and (3) what the participants themselves report as the most useful aspects of our programming. The presentation will include video clips from the students' field experiences and from reflective interviews with "graduates".

  2. Computer Based Procedures for Field Workers - FY16 Research Activities

    Energy Technology Data Exchange (ETDEWEB)

    Oxstrand, Johanna [Idaho National Lab. (INL), Idaho Falls, ID (United States); Bly, Aaron [Idaho National Lab. (INL), Idaho Falls, ID (United States)

    2016-09-01

    The Computer-Based Procedure (CBP) research effort is a part of the Light-Water Reactor Sustainability (LWRS) Program, which provides the technical foundations for licensing and managing the long-term, safe, and economical operation of current nuclear power plants. One of the primary missions of the LWRS program is to help the U.S. nuclear industry adopt new technologies and engineering solutions that facilitate the continued safe operation of the plants and extension of the current operating licenses. One area that could yield tremendous savings in increased efficiency and safety is in improving procedure use. A CBP provides the opportunity to incorporate context-driven job aids, such as drawings, photos, and just-in-time training. The presentation of information in CBPs can be much more flexible and tailored to the task, actual plant condition, and operation mode. The dynamic presentation of the procedure will guide the user down the path of relevant steps, thus minimizing time spent by the field worker to evaluate plant conditions and decisions related to the applicability of each step. This dynamic presentation of the procedure also minimizes the risk of conducting steps out of order and/or incorrectly assessed applicability of steps. This report provides a summary of the main research activities conducted in the Computer-Based Procedures for Field Workers effort since 2012. The main focus of the report is on the research activities conducted in fiscal year 2016. The activities discussed are the Nuclear Electronic Work Packages – Enterprise Requirements initiative, the development of a design guidance for CBPs (which compiles all insights gained through the years of CBP research), the facilitation of vendor studies at the Idaho National Laboratory (INL) Advanced Test Reactor (ATR), a pilot study for how to enhance the plant design modification work process, the collection of feedback from a field evaluation study at Plant Vogtle, and path forward to

  3. Social Validity's Presence in Field-Based Reading Intervention Research

    Science.gov (United States)

    Lindo, Endia J.; Elleman, Amy M.

    2010-01-01

    Social validity refers to participants' perceptions regarding the goals, procedures, and effects of a practice. The collection and report of social validity data can serve an important role in understanding, and possibly remedying, obstacles affecting the successful adoption of empirically based practices by the field. Studies published between…

  4. The Research on Anti-scaling Based on Electromagnetic Fields

    Directory of Open Access Journals (Sweden)

    Chunjie Han

    2014-05-01

    Full Text Available Electromagnetic scaling is a kind of physics method of anti-scaling. An Anti-scaling instrument that generates electromagnetic fields to prevent scaling is designed in this study. The two important functions of the instrument are as follows: The output of a single frequency signal and its frequency and voltage can be changed manually; the output of a swept-frequency signal, from 0 to 21 kHz. The instrument is composed of a signal generator and coils in which electromagnetic fields are induced. The production of the signal mainly depends on the chip of CD4046B CMOS Micro power Phase-Locked Loop. According to the principle of electromagnetic induction, the signal from the signal generator flows though coils which induce changed magnetic fields, then the magnetic fields effect the microstructure of water, the aim of anti-scaling is achieved. The experiment shows that the equipment effectively reduces scaling.

  5. Field-based phenomics for plant genetics research

    Science.gov (United States)

    Perhaps the greatest challenge for crop research in the 21st century is how to predict crop performance as a function of genetic architecture and climate change. Advances in “next generation” DNA sequencing have greatly reduced genotyping costs. Methods for characterization of plant traits (phenotyp...

  6. Using Norm-Based Appeals to Increase Response Rates in Evaluation Research: A Field Experiment

    Science.gov (United States)

    Misra, Shalini; Stokols, Daniel; Marino, Anne Heberger

    2012-01-01

    A field experiment was conducted to test the effectiveness of norm-based persuasive messages for increasing response rates in online survey research. Participants in an interdisciplinary conference were asked to complete two successive postconference surveys and randomly assigned to one of two groups at each time point. The experimental group…

  7. Field-based, research-focused experiential learning in undergraduate geoscience and physical geography classes

    Science.gov (United States)

    Oliphant, A. J.; Ackerman, A.; Flynn, M.; Mclain, J.; Moller, C.; Clements, C. B.

    2011-12-01

    Field-based experiential learning in undergraduate courses in geosciences or physical geography is essential for cementing theoretical understanding through observation, illustrating the complexity of natural systems, understanding uncertainty in observational records and providing students with tools to teach themselves beyond the instructor and the classroom. In addition, it helps stimulate interest in pursuing graduate studies and associated research in many important bio-geophysical topics. There is a real challenge to provide this type of learning opportunity to large numbers of students and to students currently under-represented in the geosciences. The learning experience in this case was focused around experimental deployment of a sophisticated atmospheric profiling system over a weekend field trip involving 50 students from three classes in two campuses; San Francisco State University and San Jose State University. Students were involved in experimental design, instrument calibration and field deployment, manual measurements and data analysis phases of field-based experimental research. The results of student work is presented as well as specific student responses to the field experience that highlight the pedagogical values provided as well as challenges to improve the learning opportunity.

  8. Considerations when using the activPAL monitor in field-based research with adult populations

    Institute of Scientific and Technical Information of China (English)

    Charlotte L. Edwardson; Elisabeth A.H. Winkler; Danielle H. Bodicoat; Tom Yates; Melanie J. Davies; David W. Dunstan; Genevieve N. Healy

    2017-01-01

    Research indicates that high levels of sedentary behavior (sitting or lying with low energy expenditure) are adversely associated with health. A key factor in improving our understanding of the impact of sedentary behavior (and patterns of sedentary time accumulation) on health is the use of objective measurement tools that collect date and time-stamped activity information. One such tool is the activPAL monitor. This thigh-worn device uses accelerometer-derived information about thigh position to determine the start and end of each period spent sitting/lying, standing, and stepping, as well as stepping speed, step counts, and postural transitions. The activPAL is increasingly being used within field-based research for its ability to measure sitting/lying via posture. We summarise key issues to consider when using the activPAL in physical activity and sedentary behavior field-based research with adult populations. It is intended that the findings and discussion points be informative for researchers who are currently using activPAL monitors or are intending to use them. Pre-data collection decisions, monitor preparation and distribution, data collection considerations, and manual and automated data processing possibilities are presented using examples from current literature and experiences from 2 research groups from the UK and Australia.

  9. Electronic data capture platform for clinical research based on mobile phones and near field communication technology.

    Science.gov (United States)

    Morak, Jürgen; Schwetz, Verena; Hayn, Dieter; Fruhwald, Friedrich; Schreier, Gunter

    2008-01-01

    Electronic data capture systems support data acquisition for clinical research and enable the evaluation of new investigational medical devices. In case of evaluating a device the most challenging part is the user interface i.e. the solution how to acquire the data within a clinical setting and to synchronize them with a web-based data centre. The aim of this paper is to describe the development of an electronic data capture system with a mobile data input solution based on mobile phones and Near Field Communication technology. This system was evaluated within a real clinical setting and demonstrated high usability, security and reliability.

  10. Mixed-field GCR Simulations for Radiobiological Research Using Ground Based Accelerators

    Science.gov (United States)

    Kim, Myung-Hee Y.; Rusek, Adam; Cucinotta, Francis A.

    2014-01-01

    Space radiation is comprised of a large number of particle types and energies, which have differential ionization power from high energy protons to high charge and energy (HZE) particles and secondary neutrons produced by galactic cosmic rays (GCR). Ground based accelerators such as the NASA Space Radiation Laboratory (NSRL) at Brookhaven National Laboratory (BNL) are used to simulate space radiation for radiobiology research and dosimetry, electronics parts, and shielding testing using mono-energetic beams for single ion species. As a tool to support research on new risk assessment models, we have developed a stochastic model of heavy ion beams and space radiation effects, the GCR Event-based Risk Model computer code (GERMcode). For radiobiological research on mixed-field space radiation, a new GCR simulator at NSRL is proposed. The NSRL-GCR simulator, which implements the rapid switching mode and the higher energy beam extraction to 1.5 GeV/u, can integrate multiple ions into a single simulation to create GCR Z-spectrum in major energy bins. After considering the GCR environment and energy limitations of NSRL, a GCR reference field is proposed after extensive simulation studies using the GERMcode. The GCR reference field is shown to reproduce the Z and LET spectra of GCR behind shielding within 20% accuracy compared to simulated full GCR environments behind shielding. A major challenge for space radiobiology research is to consider chronic GCR exposure of up to 3-years in relation to simulations with cell and animal models of human risks. We discuss possible approaches to map important biological time scales in experimental models using ground-based simulation with extended exposure of up to a few weeks and fractionation approaches at a GCR simulator.

  11. Field Research Facility

    Data.gov (United States)

    Federal Laboratory Consortium — The Field Research Facility (FRF) located in Duck, N.C. was established in 1977 to support the U.S. Army Corps of Engineers' coastal engineering mission. The FRF is...

  12. Rethinking Race and Power in Design-Based Research: Reflections from the Field

    Science.gov (United States)

    Vakil, Sepehr; McKinney de Royston, Maxine; Suad Nasir, Na'ilah; Kirshner, Ben

    2016-01-01

    Participatory design-based research continues to expand and challenge the "researcher" and "researched" paradigm by incorporating teachers, administrators, community members, and youth throughout the research process. Yet, greater clarity is needed about the racial and political dimensions of these collaborative research…

  13. Rethinking Race and Power in Design-Based Research: Reflections from the Field

    Science.gov (United States)

    Vakil, Sepehr; McKinney de Royston, Maxine; Suad Nasir, Na'ilah; Kirshner, Ben

    2016-01-01

    Participatory design-based research continues to expand and challenge the "researcher" and "researched" paradigm by incorporating teachers, administrators, community members, and youth throughout the research process. Yet, greater clarity is needed about the racial and political dimensions of these collaborative research…

  14. Information Extraction from Research Papers based on Conditional Random Field Model

    Directory of Open Access Journals (Sweden)

    Zhu Shuxin

    2013-01-01

    Full Text Available With the increasing use of CiteSeer academic search engines, the accuracy of such systems has become more and more important. The paper adopts the improved particle swarm optimization algorithm for training conditional random field model and applies it into the research papers’ title and citation retrieval. The improved particl swarm optimization algorithm  brings the particle swarm aggregation to prevent particle swarm from being plunged into local convergence too early, and uses the linear inertia factor and learning factor to update particle rate. It can control algorithm in infinite iteration by the iteration between particle relative position change rate. The results of which using the standard research papers’ heads and references to evaluate the trained conditional random field model shows that compared with traditionally conditional random field model and Hidden Markov Model, the conditional random field model ,optimized and trained by improved particle swarm, has been better ameliorated in the aspect of F1 mean error and word error rate.

  15. Analyses of Research Topics in the Field of Informetrics Based on the Method of Topic Modeling

    Directory of Open Access Journals (Sweden)

    Sung-Chien Lin

    2014-07-01

    Full Text Available In this study, we used the approach of topic modeling to uncover the possible structure of research topics in the field of Informetrics, to explore the distribution of the topics over years, and to compare the core journals. In order to infer the structure of the topics in the field, the data of the papers published in the Journal of Informetricsand Scientometrics during 2007 to 2013 are retrieved from the database of the Web of Science as input of the approach of topic modeling. The results of this study show that when the number of topics was set to 10, the topic model has the smallest perplexity. Although data scopes and analysis methodsare different to previous studies, the generating topics of this study are consistent with those results produced by analyses of experts. Empirical case studies and measurements of bibliometric indicators were concerned important in every year during the whole analytic period, and the field was increasing stability. Both the two core journals broadly paid more attention to all of the topics in the field of Informetrics. The Journal of Informetricsput particular emphasis on construction and applications ofbibliometric indicators and Scientometrics focused on the evaluation and the factors of productivity of countries, institutions, domains, and journals.

  16. Development of a summer field-based hydrogeology research experience for undergraduates

    Science.gov (United States)

    Singha, K.

    2011-12-01

    A critical problem in motivating and training the next generation of environmental scientists is providing them with an integrated scientific experience that fosters a depth of understanding and helps them build a network of colleagues for their future. As the education part of an NSF-funded CAREER proposal, I have developed a three-week summer research experience for undergraduate students that links their classroom education with field campaigns aiming to make partial differential equations come "alive" in a practical, applied setting focused on hydrogeologic processes. This course has been offered to freshman- to junior-level undergraduate students from Penn State and also the three co-operating Historically Black Universities (HBUs)--Jackson State University, Fort Valley State University, and Elizabeth City State University-since 2009. Broad learning objectives include applying their knowledge of mathematics, science, and engineering to flow and transport processes in the field and communicating science effectively in poster and oral format. In conjunction with ongoing research about solute transport, students collected field data in the Shale Hills Critical Zone Observatory in Central Pennsylvania, including slug and pumping tests, ground-penetrating radar, electrical resistivity imaging, wireline logging, and optical televiewers, among other instruments. Students conducted tracer tests, where conservative solutes are introduced into a local stream and monitored. Students also constructed numerical models using COMSOL Multiphysics, a research-grade code that can be used to model any physical system; with COMSOL, students create models without needing to be trained in computer coding. With guidance, students built basic models of fluid flow and transport to visualize how heterogeneity of hydraulic and transport properties or variations in forcing functions impact their results. The development of numerical models promoted confidence in predicting flow and

  17. Research of Arc Chamber Optimization Techniques Based on Flow Field and Arc Joint Simulation

    Science.gov (United States)

    Zhong, Jianying; Guo, Yujing; Zhang, Hao

    2016-03-01

    The preliminary design of an arc chamber in the 550 kV SF6 circuit breaker was proposed in accordance with the technical requirements and design experience. The structural optimization was carried out according to the no-load flow field simulation results and verified by no-load pressure measurement. Based on load simulation results such as temperature field variation at the arc area and the tendency of post arc current under different recovery voltage, the second optimal design was completed and its correctness was certificated by a breaking test. Results demonstrate that the interrupting capacity of an arc chamber can be evaluated by the comparison of the gas medium recovery speed and post arc current growth rate.

  18. Integration of ultra-high field MRI and histology for connectome based research of brain disorders

    Science.gov (United States)

    Yang, Shan; Yang, Zhengyi; Fischer, Karin; Zhong, Kai; Stadler, Jörg; Godenschweger, Frank; Steiner, Johann; Heinze, Hans-Jochen; Bernstein, Hans-Gert; Bogerts, Bernhard; Mawrin, Christian; Reutens, David C.; Speck, Oliver; Walter, Martin

    2013-01-01

    Ultra-high field magnetic resonance imaging (MRI) became increasingly relevant for in vivo neuroscientific research because of improved spatial resolutions. However, this is still the unchallenged domain of histological studies, which long played an important role in the investigation of neuropsychiatric disorders. While the field of biological psychiatry strongly advanced on macroscopic levels, current developments are rediscovering the richness of immunohistological information when attempting a multi-level systematic approach to brain function and dysfunction. For most studies, histology sections lost information on three-dimensional reconstructions. Translating histological sections to 3D-volumes would thus not only allow for multi-stain and multi-subject alignment in post mortem data, but also provide a crucial step in big data initiatives involving the network analyses currently performed with in vivo MRI. We therefore investigated potential pitfalls during integration of MR and histological information where no additional blockface information is available. We demonstrated that strengths and requirements from both methods can be effectively combined at a spatial resolution of 200 μm. However, the success of this approach is heavily dependent on choices of hardware, sequence and reconstruction. We provide a fully automated pipeline that optimizes histological 3D reconstructions, providing a potentially powerful solution not only for primary human post mortem research institutions in neuropsychiatric research, but also to help alleviate the massive workloads in neuroanatomical atlas initiatives. We further demonstrate (for the first time) the feasibility and quality of ultra-high spatial resolution (150 μm isotopic) imaging of the entire human brain MRI at 7T, offering new opportunities for analyses on MR-derived information. PMID:24098272

  19. Integration of ultra-high field MRI and histology for connectome based research of brain disorders

    Directory of Open Access Journals (Sweden)

    Shan eYang

    2013-09-01

    Full Text Available Ultra-high field magnetic resonance imaging (MRI became increasingly relevant for in vivo neuroscientific research because of improved spatial resolutions. However, this is still the unchallenged domain of histological studies, which long played an important role in the investigation of neuropsychiatric disorders. While the field of biological psychiatry strongly advanced on macroscopic levels, current developments are rediscovering the richness of immunohistological information when attempting a multi-level systematic approach to brain function and dysfunction. For most studies, histology sections lost information on three-dimensional reconstructions. Translating histological sections to 3D-volumes would thus not only allow for multi-stain and multi-subject alignment in post mortem data, but also provide a crucial step in big data initiatives involving the network analyses currently performed with in vivo MRI. We therefore investigated potential pitfalls during integration of MR and histological information where no additional blockface information is available. We demonstrated that strengths and requirements from both methods seem to be ideally merged at a spatial resolution of 200 μm. However, the success of this approach is heavily dependent on choices of hardware, sequence and reconstruction. We provide a fully automated pipeline that optimizes histological 3D reconstructions, providing a potentially powerful solution not only for primary human post mortem research institutions in neuropsychiatric research, but also to help alleviate the massive workloads in neuroanatomical atlas initiatives. We further demonstrate (for the first time the feasibility and quality of ultra-high spatial resolution (150 µm isotopic imaging of the entire human brain MRI at 7T, offering new opportunities for analyses on MR-derived information.

  20. Field Testing LIDAR Based Feed-Forward Controls on the NREL Controls Advanced Research Turbine: Preprint

    Energy Technology Data Exchange (ETDEWEB)

    Scholbrock, A. K.; Fleming, P. A.; Fingersh, L. J.; Wright, A. D.; Schlipf, D.; Haizmann, F.; Belen, F.

    2013-01-01

    Wind turbines are complex, nonlinear, dynamic systems driven by aerodynamic, gravitational, centrifugal, and gyroscopic forces. The aerodynamics of wind turbines are nonlinear, unsteady, and complex. Turbine rotors are subjected to a chaotic three-dimensional (3-D) turbulent wind inflow field with imbedded coherent vortices that drive fatigue loads and reduce lifetime. In order to reduce cost of energy, future large multimegawatt turbines must be designed with lighter weight structures, using active controls to mitigate fatigue loads, maximize energy capture, and add active damping to maintain stability for these dynamically active structures operating in a complex environment. Researchers at the National Renewable Energy Laboratory (NREL) and University of Stuttgart are designing, implementing, and testing advanced feed-back and feed-forward controls in order to reduce the cost of energy for wind turbines.

  1. RESEARCH ON A SCANNING NEAR-FIELD MICROSCOPY BASED ON A QUARTZ RESONATOR

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    A scanning near-field acoustic microscopy(SNAM) us ed in imaging the topography of precise surfaces is presented. As a micro-force sensor, a non-encapsulated 1 MHz quartz resonator is damped by hydrodynamic fo rces when approaching an object. Thus the oscillating characteristics of the leg of the quartz resonator change. While measuring the decrease of the amplitude o f vibrating, the shape of the object can be obtained. Based on the analyses of t he principle and key parameters of SNAM, a SNAM is exploited. A lateral resoluti on of 0.5 μm and vertical resolution of 2 nm has been achieved in the experimen ts.

  2. Perceptions of community-based field workers on the effect of a longitudinal biomedical research project on their sustainable livelihoods.

    Science.gov (United States)

    Moyo, Christabelle S; Francis, Joseph; Bessong, Pascal O

    2017-03-17

    Researchers involved in biomedical community-based projects rarely seek the perspectives of community fieldworkers, who are the 'foot soldiers' in such projects. Understanding the effect of biomedical research on community-based field workers could identify benefits and shortfalls that may be crucial to the success of community-based studies. The present study explored the perceptions of community-based field workers on the effect of the Etiology, Risk Factors and Interactions of Enteric Infections and Malnutrition and the Consequences for Child Health and Development Project" (MAL-ED) South Africa on their tangible and intangible capital which together comprise sustainable livelihoods. The study was conducted in Dzimauli community in Limpopo Province of South Africa between January-February 2016. The sustainable livelihoods framework was used to query community-based field workers' perspectives of both tangible assets such as income and physical assets and intangible assets such as social capital, confidence, and skills. Data were collected through twenty one individual in-depth interviews and one focus group discussion. Data were analysed using the Thematic Content Analysis approach supported by ATLAS.ti, version 7.5.10 software. All the field workers indicated that they benefitted from the MAL-ED South Africa project. The benefits included intangible assets such as acquisition of knowledge and skills, stronger social capital and personal development. Additionally, all indicated that MAL-ED South Africa provided them with the tangible assets of increased income and physical assets. Observations obtained from the focus group discussion and the community-based leaders concurred with the findings from the in-depth interviews. Additionally, some field workers expressed the desire for training in public relations, communication, problem solving and confidence building. The MAL-ED South Africa, biomedical research project, had positive effects on tangible and

  3. Launching a virtual decision lab: development and field-testing of a web-based patient decision support research platform.

    Science.gov (United States)

    Hoffman, Aubri S; Llewellyn-Thomas, Hilary A; Tosteson, Anna N A; O'Connor, Annette M; Volk, Robert J; Tomek, Ivan M; Andrews, Steven B; Bartels, Stephen J

    2014-12-12

    Over 100 trials show that patient decision aids effectively improve patients' information comprehension and values-based decision making. However, gaps remain in our understanding of several fundamental and applied questions, particularly related to the design of interactive, personalized decision aids. This paper describes an interdisciplinary development process for, and early field testing of, a web-based patient decision support research platform, or virtual decision lab, to address these questions. An interdisciplinary stakeholder panel designed the web-based research platform with three components: a) an introduction to shared decision making, b) a web-based patient decision aid, and c) interactive data collection items. Iterative focus groups provided feedback on paper drafts and online prototypes. A field test assessed a) feasibility for using the research platform, in terms of recruitment, usage, and acceptability; and b) feasibility of using the web-based decision aid component, compared to performance of a videobooklet decision aid in clinical care. This interdisciplinary, theory-based, patient-centered design approach produced a prototype for field-testing in six months. Participants (n = 126) reported that: the decision aid component was easy to use (98%), information was clear (90%), the length was appropriate (100%), it was appropriately detailed (90%), and it held their interest (97%). They spent a mean of 36 minutes using the decision aid and 100% preferred using their home/library computer. Participants scored a mean of 75% correct on the Decision Quality, Knowledge Subscale, and 74 out of 100 on the Preparation for Decision Making Scale. Completing the web-based decision aid reduced mean Decisional Conflict scores from 31.1 to 19.5 (p platform that was feasible for use in research studies in terms of recruitment, acceptability, and usage. Within this platform, the web-based decision aid component performed comparably with the videobooklet

  4. Research on field of view of optical receiving antenna based on indoor visible light communication system

    Science.gov (United States)

    Gao, Mingguang; Lan, Tian; Zhao, Tao; Zhang, Yilun; Cui, Zhenghua; Ni, Guoqiang

    2015-08-01

    Optical receiving antenna is usually positioned before the detector of an indoor visible light communication (VLC) system in order to collect more optical energy into the detector. Besides optical gain of the antenna, the field of view (FOV) plays also an important role to the performance of a VLC system. In this paper, the signal noise ratio (SNR) and inter-symbol interference (ISI) versus FOV of the antenna are simulated via Line-of-Sight (LOS) and non-Line-of-Sight (NLOS) links within a room with a size of 5m × 5m × 3m. Results show that, the blind area appears while the FOV is less than 40 deg. and the SNR reduces as FOV increases and keeps small when FOV is more than 70 deg.. Furthermore, the average power of ISI rises with the increase of FOV, and the rising trend is relatively moderate when FOV is below 50 deg., while there is a rapid increase between 50 deg. and 70 deg. and finally tends to be stable after 70 deg. Therefore, it is practical to determine the FOV of the optical receiving antenna in the scope of 40 to 50 deg. based on the installment of LED lights on the ceiling here so as to avoid the blind area, attain high SNR, and reduce the influence of ISI. It is also worthwhile in practice to provide an identifiable evidence for the determination of FOV of the optical antenna.

  5. Research on optical fiber magnetic field sensors based on multi-mode fiber and spherical structure

    Science.gov (United States)

    Wang, Yan; Tong, Zheng-rong; Zhang, Wei-hua; Luan, Pan-pan; Zhao, Yue; Xue, Li-fang

    2017-01-01

    A magnetic field sensor with a magnetic fluid (MF)-coated intermodal interferometer is proposed and experimentally demonstrated. The interferometer is formed by sandwiching a segment of single mode fiber (SMF) between a segment of multi-mode fiber (MMF) and a spherical structure. It can be considered as a cascade of the traditional SMF-MMF-SMF structure and MMF-SMF-sphere structure. The transmission spectral characteristics change with the variation of applied magnetic field. The experimental results exhibit that the magnetic field sensitivities for wavelength and transmission loss are 0.047 nm/mT and 0.215 dB/mT for the interference dip around 1 535.36 nm. For the interference dip around 1548.41nm, the sensitivities are 0.077 nm/mT and 0.243 dB/mT. Simultaneous measurement can be realized according to the different spectral responses.

  6. Designing and Evaluating Research-Based Instructional Sequences for Introducing Magnetic Fields

    Science.gov (United States)

    Guisasola, Jenaro; Almudi, Jose Manuel; Ceberio, Mikel; Zubimendi, Jose Luis

    2009-01-01

    This study examines the didactic suitability of introducing a teaching sequence when teaching the concept of magnetic fields within introductory physics courses at the university level. This instructional sequence was designed taking into account students' common conceptions, an analysis of the course content, and the history of the development of…

  7. A bibliometric based review on social entrepreneurship and its establishment as a field of research

    OpenAIRE

    Sassmannshausen, Sean Patrick; Volkmann, Christine

    2013-01-01

    This paper provides an overview on the state of art of research on social entrepreneurship and the establishment of this topic in the academic world. It uses scientometric methods, especially bibliometrics, in measuring the maturity of social entrepreneurship research. The empirical part reveals the increasing number of literature, the institutionalization of social entrepreneurship in seven dimensions, the emergence of thematic clusters, and methodological issue. The paper makes concrete sug...

  8. Field test of nuclide migration in bentonite-based materials at aerated zone. Cooperative research program on field migration test between CIRP and JAERI

    Energy Technology Data Exchange (ETDEWEB)

    Fan Zhiwen; Cui Anxi; Gu Cunli [China Inst. for Radiation Protection, Taiyuan, Shanxi (China)] [and others

    2002-03-01

    A field test was jointly conducted by China Institute for Radiation Protection (CIRP) and Japan Atomic Energy Research Institute (JAERI) to explore moisture movement with Br{sup -} and migration of radioactive tracer {sup 237}Np, {sup 238}Pu and {sup 90}Sr in bentonite-based materials at aerated zone. The test ran under two rainfall conditions, the artificial rainfall with sprinkling density of 15 mm/d and 5 mm/hr, and the natural rainfall. Tracing test of Br{sup -} implies that there does have water going through the bentonite specimen. However, the curves are very complex and further work need be conducted to quantify this movement. {sup 238}Pu has no observable movement during the test period under either rainfall conditions, and {sup 237}Np has very short movement dominated by diffusion. Bentonite-based materials are effective to retard nuclide migration. (author)

  9. Data Mining for Social Work Students: Teaching Practice-Based Research in Conjunction with a Field Work Placement

    Science.gov (United States)

    Auslander, Gail K.; Rosenne, Hadas

    2016-01-01

    Although research studies are important for social work students, the students rarely like research classes or see their value. At the Hebrew University of Jerusalem, one group of BSW students was encouraged to carry out the required research in their field work setting, the Hadassah University Medical Center. Students used data mining, that is,…

  10. Research on reconstruction algorithms for 2D temperature field based on TDLAS

    Science.gov (United States)

    Peng, Dong; Jin, Yi; Zhai, Chao

    2015-10-01

    Tunable Diode Laser Absorption Tomography(TDLAT), as a promising technique which combines Tunable Diode Laser Absorption Spectroscopy(TDLAS) and computer tomography, has shown the advantages of high spatial resolution for temperature measurement. Given the large number of tomography algorithms, it is necessary to understand the feature of tomography algorithms and find suitable ones for the specific experiment. This paper illustrates two different algorithms including algebraic reconstruction technique (ART) and simulated annealing (SA) which are implemented using Matlab. The reconstruction simulations of unimodal and bimodal temperature phantom were done under different conditions, and the results of the simulation were analyzed. It shows that for the unimodal temperature phantom, the both algorithms work well, the reconstruction quality is acceptable under suitable conditions and the result of ART is better. But for the bimodal temperature phantom, the result of SA is much better. More specifically, the reconstruction quality of ART is mainly affected by the ray coverage, the maximum deviation for the unimodal temperature phantom is 5.9%, while for the bimodal temperature field, it is up to 25%. The reconstruction quality of SA is mainly affected by the number of the transitions, the maximum deviation for the unimodal temperature phantom is 9.2% when 6 transitions are used which is a little worse than the result of ART; however, the maximum deviation for the bimodal temperature phantom is much better than ART's, which is about 5.2% when 6 transitions are used.

  11. Increasing student engagement in science through field-based research: University of Idaho's WoW STEMcore Program

    Science.gov (United States)

    Squires, A. L.; Boylan, R. D.; Rittenburg, R.; Boll, J.; Allan, P.

    2013-12-01

    A recent statewide survey assessing STEM perceptions in Idaho showed that high school student interest in science and preparation for college are declining. To address this decline we are piloting an interdisciplinary, community and field-based water science education approach for 10th - 12th grade science courses during the 2013-14 school year called WoW STEMcore. The program is led by graduate students in the University of Idaho (UI) Waters of the West (WoW) program. Our methods are based on proven best practices from eight years of NSF GK-12 experience at UI and over a decade of GK-12 experience at more than 300 programs in the U.S. WoW STEMcore works to strengthen partnerships between WoW graduate students, high school teachers, and regional organizations that work on natural resource management or place-based science education with the intent of sustaining and merging efforts to increase scientific literacy among high school students and to better prepare them for higher education. In addition, graduate students gain outreach, education and communication experience and teachers are exposed to new and relevant research content and methods. WoW STEMcore is fostering these partnerships through water themed projects at three northern Idaho high schools. The pilot program will culminate in Spring 2014 with a regional Water Summit in which all participating students and partners will converge at a two-day youth scientific conference and competition where they can showcase their research and the skills they gained over the course of the year. We hypothesize that through a graduate student-led, field-based program that gets students out of the classroom and thinking about water resource issues in their communities, we will 1) fuel high school students' interest in science through hands on and inquiry-based pedagogy and 2) improve preparation for higher education by providing graduate student mentors to discuss the pathway from high school to college to a career. In

  12. Single-Case Design Research: Building the Evidence-Base in the Field of Education of Deaf and Hard of Hearing Students.

    Science.gov (United States)

    Cannon, Joanna E; Guardino, Caroline; Antia, Shirin D; Luckner, John L

    2016-01-01

    The field of education of deaf and hard of hearing (DHH) students has a paucity of evidence-based practices (EBPs) to guide instruction. The authors discussed how the research methodology of single-case design (SCD) can be used to build EBPs through direct and systematic replication of studies. An overview of SCD research methods is presented, including an explanation of how internal and external validity issues are addressed, and why SCD is appropriate for intervention research with DHH children. The authors then examine the SCD research in the field according to quality indicators (QIs; at the individual level and as a body of evidence) to determine the existing evidence base. Finally, future replication areas are recommended to fill the gaps in SCD research with students who are DHH in order to add to the evidence base in the field.

  13. A community based field research project investigating anaemia amongst young children living in rural Karnataka, India: a cross sectional study

    Directory of Open Access Journals (Sweden)

    Black Jim

    2009-02-01

    Full Text Available Abstract Background Anaemia is an important problem amongst young children living in rural India. However, there has not previously been a detailed study of the biological aetiology of this anaemia, exploring the relative contributions of iron, vitamin B12, folate and Vitamin A deficiency, inflammation, genetic haemoglobinopathy, hookworm and malaria. Nor have studies related these aetiologic biological factors to household food security, standard of living and child feeding practices. Barriers to conducting such work have included perceived reluctance of village communities to permit their children to undergo venipuncture, and logistical issues. We have successfully completed a community based, cross sectional field study exploring in detail the causes of anaemia amongst young children in a rural setting. Methods and design A cross sectional, community based study. We engaged in extensive community consultation and tailored our study design to the outcomes of these discussions. We utilised local women as field workers, harnessing the capacity of local health workers to assist with the study. We adopted a programmatic approach with a census rather than random sampling strategy in the village, incorporating appropriate case management for children identified to have anaemia. We developed a questionnaire based on existing standard measurement tools for standard of living, food security and nutrition. Specimen processing was conducted at the Primary Health Centre laboratory prior to transport to an urban research laboratory. Discussion Adopting this study design, we have recruited 415 of 470 potentially eligible children who were living in the selected villages. We achieved support from the community and cooperation of local health workers. Our results will improve the understanding into anaemia amongst young children in rural India. However, many further studies are required to understand the health problems of the population of rural India, and

  14. Research and Teaching. Journey to the End of the Earth: Academic and Professional Benefits for Students Participating in a Field-Based Research Program in Antarctica

    Science.gov (United States)

    Garcia, Claudia Venessa; Robertson, William H.; Lougheed, Vanessa; Tweedie, Craig; Velasco, Aaron

    2013-01-01

    With the need to increase minority representation in the polar sciences, a team of researchers from a southwestern United States public university developed an innovative field research experience entitled the International Polar Year-Research and Educational Opportunities in Antarctica for Minorities (IPY-ROAM). Supported by a National Science…

  15. Unit of Analysis: Impact of Silverman and Solmon's Article on Field-Based Intervention Research in Physical Education in the U.S.A.

    Science.gov (United States)

    Li, Weidong; Chen, Yung-Ju; Xiang, Ping; Xie, Xiuge; Li, Yilin

    2017-01-01

    Purpose: The purposes of this study were to: (a) examine the impact of the Silverman and Solmon article (1998) on how researchers handle the unit of analysis issue in their field-based intervention research in physical education in the United States and summarize statistical approaches that have been used to analyze the data, and (b) provide…

  16. Research on Raman-OTDR sensing based Optical Phase Conductor (OPPC) temperature monitoring and the section temperature field

    Science.gov (United States)

    Tong, Jie; Yang, Delong; Gao, Qiang; Lei, Yuqing; Chen, Xi

    2013-12-01

    OPPC (Optical Phase Conductor) is a particular type of electric optical cables which composite the fiber unit into the structure of traditional phase lines. The special design fully leverages the power system's own line resources and achieves dual functions of power transmission and communication simultaneously, particularly in the power distribution networks. Furthermore, Raman optical time domain reflectometry (ROTDR) based distributed temperature sensing (DTS) system integrates with OPPC, that is to plant a single or several multimode optical fibers into the fiber unit of OPPC, which can realize the remote, online, continuous measure and location for the conductor's temperature. This kind of monitoring system has many advantages such as anti-electromagnetic interference, information sensing and data transmission unification, long life-cycle, light weight, long transmission distance and non-power supply on site. But nonetheless, there is still a problem has to been resolved, that is whether the temperature of DTS fiber's position represents exactly the one of OPPC's. This article takes the section temperature field of 400/50 OPPC as the research object. Based on the temperature data measured by the Raman distributed temperature optical fiber sensor, a large number of finite element analysis and experiments are developed. The DTS measurement results under different actual working conditions of current-carrying capacity, wind velocity and environment temperature are quantitative analyzed. The changing rules and the relationships among the measurement results of DTS, the maximum and the surface temperatures of OPPC, and the results of numerical simulations and experiments have been proposed and demonstrated. On the whole, the main contributions of this paper are: (1) According to the structure of 400/50 OPPC, the Fluid-Structure Interaction (FSI) methodology and the steady section temperature field model are established which can reveal the OPPC's temperature

  17. Presentation : a field of research

    OpenAIRE

    Daunay, Bertrand; Plane, Sylvie; Tauveron, Catherine

    2013-01-01

    Repères is a scientific journal listed by the European Reference Index for the Humanities (ERIH) that publishes French-language research into the didactics of French as a native or first language. “Didactics” in French refers to a field of research that seeks to understand and describe learning and teaching contents within school subjects. This is why the didactics of mathematics, science, technology and French (as a foreign language or as mother tongue) as well as other didactics have develo...

  18. Tracing the scientific outputs in the field of Ebola research based on publications in the Web of Science.

    Science.gov (United States)

    Yi, Fengyun; Yang, Pin; Sheng, Huifeng

    2016-04-15

    Ebola virus disease (hereafter EVD or Ebola) has a high fatality rate. The devastating effects of the current epidemic of Ebola in West Africa have put the global health response in acute focus. In response, the World Health Organization (WHO) has declared the Ebola outbreak in West Africa as a "Public Health Emergency of International Concern". A small proportion of scientific literature is dedicated to Ebola research. To identify global research trends in Ebola research, the Institute for Scientific Information (ISI) Web of Science™ database was used to search for data, which encompassed original articles published from 1900 to 2013. The keyword "Ebola" was used to identify articles for the purposes of this review. In order to include all published items, the database was searched using the Basic Search method. The earliest record of literature about Ebola indexed in the Web of Science is from 1977. A total of 2477 publications on Ebola, published between 1977 and 2014 (with the number of publications increasing annually), were retrieved from the database. Original research articles (n = 1623, 65.5%) were the most common type of publication. Almost all (96.5%) of the literature in this field was in English. The USA had the highest scientific output and greatest number of funding agencies. Journal of Virology published 239 papers on Ebola, followed by Journal of Infectious Diseases and Virology, which published 113 and 99 papers, respectively. A total of 1911 papers on Ebola were cited 61,477 times. This analysis identified the current state of research and trends in studies about Ebola between 1977 and 2014. Our bibliometric analysis provides a historical perspective on the progress in Ebola research.

  19. Egyptian tortoise conservation: A community-based, field research program developed from a study on a captive population.

    Science.gov (United States)

    Attum, Omar; Baha El Din, Mindy; Baha El Din, Sherif; Habinan, Suliman

    2007-09-01

    Local community participation and ex situ conservation has the potential to assist the recovery of the endangered Egyptian tortoise, Testudo kleinmanni. We initiated an in situ community-based conservation and research program from a captive population of T. kleinmanni. We used a captive population of the Egyptian tortoise to train a member of the local community as a research technician and used his indigenous tracking skills and knowledge of the area to collect activity and dietary data on 28 captive tortoises. We overcame problems with illiteracy by creating a data sheet based on symbols and numbers. This data sheet allowed us to use the indigenous knowledge of various people from the community, and employ them in the future. Our local community approach to data collection, in conjunction with a craft program, made the conservation of the Egyptian tortoise more rewarding to the local community by providing a more sustainable form of income than collecting animals for the pet trade. Our multidimensional approach (local community participation as research technicians, craft program, and trust building) for gaining local support eventually led to the rediscovery of wild Egyptian tortoises in North Sinai, which was significant, as this species was presumed extinct in Egypt. We have now shifted our focus to in situ conservation, using the research and local capacity building template developed from this captive population study. Our template can be used by zoos and conservation organizations with small budgets and collections of native species in natural habitats to create similar captive research programs that can be applied to in situ conservation. Zoo Biol 26:397-406, 2007. (c) 2007 Wiley-Liss, Inc.

  20. Analyses of Acceptability Judgments Made Toward the Use of Nanocarrier-Based Targeted Drug Delivery: Interviews with Researchers and Research Trainees in the Field of New Technologies.

    Science.gov (United States)

    Chenel, Vanessa; Boissy, Patrick; Cloarec, Jean-Pierre; Patenaude, Johane

    The assessment of nanotechnology applications such as nanocarrier-based targeted drug delivery (TDD) has historically been based mostly on toxicological and safety aspects. The use of nanocarriers for TDD, a leading-edge nanomedical application, has received little study from the angle of experts' perceptions and acceptability, which may be reflected in how TDD applications are developed. In recent years, numerous authors have maintained that TDD assessment should also take into account impacts on ethical, environmental, economic, legal, and social (E(3)LS) issues in order to lead to socially responsible innovation. Semi-structured interviews (n = 22) were conducted with French and Canadian researchers and research trainees with diverse disciplinary backgrounds and involved in research related to emerging technologies. The interviews focussed on scenarios presenting two types of TDD nanocarriers (carbon, synthetic DNA) in two contexts of use (lung cancer, seasonal flu). Content and inductive analyses of interviews showed how facets of perceived impacts such as health, environment, social cohabitation, economy, life and death, representations of the human being and nature, and technoscience were weighed in acceptability judgments. The analyses also revealed that contextual factors related to device (nature of the treatment), to use (gravity of the disease), and to user (culture) influenced the weighting assigned to perceived impacts and thus contributed to variability in interviewees' judgments of acceptability. Giving consideration to researchers' perspective could accompany first steps of implementation and development of nanomedicine by producing a first, but wide, picture of the acceptability of nanocarrier-based TDD.

  1. "Education-based Research"

    DEFF Research Database (Denmark)

    Degn Johansson, Troels

    This paper lays out a concept of education-based research-the production of research knowledge within the framework of tertiary design education-as an integration of problem-based learning and research-based education. This leads to a critique of reflective practice as the primary way to facilitate...... learning at this level, a discussion of the nature of design problems in the instrumentalist tradition, and some suggestions as to how design studies curricula may facilitate education-based research....

  2. The research about the multi-freedom degree reciprocity principle for diffuse sound field based on the sound pressure field description

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    The multi-DOF(degree-of-freedom) reciprocity principle for diffuse field was proposed and applied in the mid-frequency analysis of a complex vibro-acoustic system.As the application of this diffuse reciprocity principle in a sound field leads the model to be unnecessarily enormous,one multi-DOF acoustic reciprocity principle more applicable for diffuse sound field is proposed here.First,the"blocked"model of diffuse sound field is proposed to describe the blocked sound pressure on the surface of a structu...

  3. Instructional Technology: The Research Field.

    Science.gov (United States)

    Gagne, Robert M.

    1986-01-01

    Reflects upon opportunities for research in instructional technology provided by present state of media hardware technology and educational requirements. Prospects for research in incidental learning, including learning from television, are discussed, as well as traditional learning research on intentional learning, including possibilities for…

  4. Field-based transformation optics

    DEFF Research Database (Denmark)

    Novitsky, Andrey

    2011-01-01

    Instead of common definition of the transformation-optics devices via the coordinate transformation we offer the approach founded on boundary conditions for the fields. We demonstrate the effectiveness of the approach by two examples: two-shell cloak and concentrator of electric field. We believe...... that the field-based approach is quite important for effective field control....

  5. Research into a Single-aperture Light Field Camera System to Obtain Passive Ground-based 3D Imagery of LEO Objects

    Science.gov (United States)

    Bechis, K.; Pitruzzello, A.

    2014-09-01

    This presentation describes our ongoing research into using a ground-based light field camera to obtain passive, single-aperture 3D imagery of LEO objects. Light field cameras are an emerging and rapidly evolving technology for passive 3D imaging with a single optical sensor. The cameras use an array of lenslets placed in front of the camera focal plane, which provides angle of arrival information for light rays originating from across the target, allowing range to target and 3D image to be obtained from a single image using monocular optics. The technology, which has been commercially available for less than four years, has the potential to replace dual-sensor systems such as stereo cameras, dual radar-optical systems, and optical-LIDAR fused systems, thus reducing size, weight, cost, and complexity. We have developed a prototype system for passive ranging and 3D imaging using a commercial light field camera and custom light field image processing algorithms. Our light field camera system has been demonstrated for ground-target surveillance and threat detection applications, and this paper presents results of our research thus far into applying this technology to the 3D imaging of LEO objects. The prototype 3D imaging camera system developed by Northrop Grumman uses a Raytrix R5 C2GigE light field camera connected to a Windows computer with an nVidia graphics processing unit (GPU). The system has a frame rate of 30 Hz, and a software control interface allows for automated camera triggering and light field image acquisition to disk. Custom image processing software then performs the following steps: (1) image refocusing, (2) change detection, (3) range finding, and (4) 3D reconstruction. In Step (1), a series of 2D images are generated from each light field image; the 2D images can be refocused at up to 100 different depths. Currently, steps (1) through (3) are automated, while step (4) requires some user interaction. A key requirement for light field camera

  6. Field-Based Teacher Research: How Teachers and Scientists Working Together Answers Questions about Turtle Nesting Ecology while Enhancing Teachers' Inquiry Skills

    Science.gov (United States)

    Winters, J. M.; Jungblut, D.; Catena, A. N.; Rubenstein, D. I.

    2013-12-01

    Providing rigorous academic supplement to a professional development program for teachers, QUEST is a fusion of Drexel University's environmental science research department with Princeton University's Program in Teacher Preparation. Completed in the summers of 2012 (in partnership with Earthwatch) and 2013 in Barnegat Bay, New Jersey, QUEST's terrapin field research program enhances K-12 teachers' ecological knowledge, develops inquiry-based thinking in the classroom, and builds citizen science engagement. With a focus on quality question development and data analysis to answer questions, teachers are coached in developing, implementing, and presenting independent research projects on diamondback terrapin nesting ecology. As a result, teachers participating in QUEST's week long program bring a realistic example of science in action into their classrooms, helping to develop their own students' critical thinking skills. For teachers, this program provides training towards educating students on how to do real and imaginative science - subsequently sending students to university better prepared to engage in their own independent research. An essential component of the collaboration through QUEST, in addition to the teacher's experience during and after the summer institute, is the research data collected which supplements that of the Principal Investigator. In 2012, by documenting terrapin nest site predators, teachers gained valuable scientific experience, while Drexel acquired important ecological data which would have not been able to be collected otherwise. In 2013, teachers helped answer important questions about terrapin nesting success post Superstorm Sandy. In fact, the 2013 QUEST teachers are the first to visualize the frighteningly increased erosion of a primary terrapin nesting site due to Sandy; showing how most terrapin nests now lie in the bay, instead of safe on shore. Teachers comment that interacting with scientists in the field, and contributing to

  7. Reaction-Based Reactive Transport Modeling of Iron Reduction and Uranium Immobilization at Area 2 of the NABIR Field Research Center

    Energy Technology Data Exchange (ETDEWEB)

    Burgos, W.D.

    2009-09-02

    This report summarizes research conducted in conjunction with a project entitled “Reaction-Based Reactive Transport Modeling of Iron Reduction and Uranium Immobilization at Area 2 of the NABIR Field Research Center”, which was funded through the Integrative Studies Element of the former NABIR Program (now the Environmental Remediation Sciences Program) within the Office of Biological and Environmental Research. Dr. William Burgos (The Pennsylvania State University) was the overall PI/PD for the project, which included Brian Dempsey (Penn State), Gour-Tsyh (George) Yeh (Central Florida University), and Eric Roden (formerly at The University of Alabama, now at the University of Wisconsin) as separately-funded co-PIs. The project focused on development of a mechanistic understanding and quantitative models of coupled Fe(III)/U(VI) reduction in FRC Area 2 sediments. The work builds on our previous studies of microbial Fe(III) and U(VI) reduction, and was directly aligned with the Scheibe et al. ORNL FRC Field Project at Area 2.

  8. Research of Obstacle Avoidance Algorithm for Robot Based on Artificial Potential Field%基于人工势场法的机器人避障算法

    Institute of Scientific and Technical Information of China (English)

    叶彬强; 王一

    2012-01-01

    提出了基于人工势场的机器人轨迹规划算法,根据人工势场法原理,将机器人轨迹规划的人工势场算法分为3层进行设计。为了检测避障程序能否正常运行,对其进行了仿真分析。结果证实,基于人工势场法的机器人轨迹规划算法具备较精确的移动轨迹。%The robot intelligent obstacle avoidance emerges and develops because of the rapid development of artificial intelligence and high-performance requirements of high-technology. This paper has put forward and researched the path planning method for mobile robot based on artificial potential field according to the elements of artificial potential field. The path planning method for mobile robot would be divided into three parts to design. At the same time, in order to detect whether the path planning program runs correctly, some emulators are carried. As a result, the path planning method mobile robot based on artificial potential field had a better exact locomotive

  9. Research on wind-field Visualization of 3D data Based on OSG%基于OSG的风场三维数据可视化研究

    Institute of Scientific and Technical Information of China (English)

    叶伟; 陈波; 孙文磊

    2014-01-01

    To research the method of visualization of 3D data ,the paper analysis the moden of 3D data grid data model analysis,and Based on OpenSenceGraph (OSG) graphics system in C++ platform, three-dimensional flow field analysis of grid data scientific storage and visualization mapping, mapping, complete visualization post-processing, finally realizes the visualization of the 3 d flow field data. The vector line method is applied in this article, and in the actual wind field on the 3 d data is verified, the research of 3 d flow field characteristics of effective information retrieval and visualization application has important significance.%为了研究三维流场数据的可视化方法,本文应用fluent软件对三维流体模型进行网格划分、网格数据求解分析,然后基于OpenSenceGraph(简称OSG)图形系统在C++平台上,对分析的三维流场网格数据进行科学存储、可视化映射、绘制,完成可视化的后处理,最终实现了三维流场数据的可视化。本文应用了矢量线的方法,并在实际风场三维数据上也得到了验证,研究对三维流场特征等有效信息的获取及可视化实际应用有着重要的意义。

  10. Participatory design based research

    DEFF Research Database (Denmark)

    Dau, Susanne; Falk, Lars; Jensen, Louise Bach

    2014-01-01

    This poster reveal how participatory design based research by the use of a CoED inspired creative process can be used for designing solutions to problems regarding students study activities outside campus.......This poster reveal how participatory design based research by the use of a CoED inspired creative process can be used for designing solutions to problems regarding students study activities outside campus....

  11. Participatory design based research

    DEFF Research Database (Denmark)

    Dau, Susanne; Bach Jensen, Louise; Falk, Lars

    2014-01-01

    This poster reveal how participatory design based research by the use of a CoED inspired creative process can be used for designing solutions to problems regarding students study activities outside campus.......This poster reveal how participatory design based research by the use of a CoED inspired creative process can be used for designing solutions to problems regarding students study activities outside campus....

  12. Panspermia: A Promising Field of Research

    Science.gov (United States)

    Rampelotto, P. H.

    2010-04-01

    In recent years, most of the major barriers against the acceptance of Panspermia have been demolished and this hypothesis emerges as a promising field of research. In this work, recent discoveries and the principal advances in Panspermia are discussed.

  13. Enhancing Social Work Research Education through Research Field Placements

    Science.gov (United States)

    Hewson, Jennifer A.; Walsh, Christine A.; Bradshaw, Cathryn

    2010-01-01

    The increased focus on the role of research in the social service sector, pressure for practitioners to engage in research and the demand for integration of research and practice challenges faculties about ways in which to engage social work students in research. This paper evaluates a research based practicum program within a social work faculty…

  14. How do we support informal educators teaching for climate literacy? Lessons from design-based research to improve climate science field trips through educator experience

    Science.gov (United States)

    Allen, L. B.; Steiner, M.; Crowley, K. J.

    2012-12-01

    Climate literacy is an important and timely aspect of students' and educators' scientific understanding. Climate science is a challenging topic to understand and communicate, given that factors affecting change in climate are spatially and temporally distant from one another, and include layers of understanding biotic, abiotic, and anthropogenic factors. Some learning scientists describe complex processes such as these "constraint-based interactions" and consider them to be among the more difficult for learners to grasp. An additional challenge for climate education is the politicized nature of the issue of climate change among U.S. adults. Our goal is to create a climate literacy program that bridges informal and formal learning for middle school students by integrating tools and ideas from pre-field trip classroom activities into deep investigations on the floor of the natural history museum. In this presentation, we address the challenges and successes of an in-progress climate literacy project sponsored by NASA from the perspective of educator learning. A group of experienced natural history docents were asked to participate in an iteratively designed field trip program for climate education. The project challenged educators with both new content and a new pedagogical structure: using real NASA satellite data to visualize and explore earth's climate, while implementing student-centered, participatory learning on the floor of the museum. By engaging in an iterative, design-based research process of prototyping field trips at the Carnegie Museum of Natural History, we collected observational and interview data from seven dedicated informal educators who were asked to change both the content and the format of their interactions with middle school field trip students. These docents have a wide variety of experiences and opinions around climate science, data, and student-centered teaching and learning pedagogies. Over the course of one semester of iteratively

  15. Ethical considerations for field research on fishes

    Directory of Open Access Journals (Sweden)

    Rhett H. Bennett

    2016-03-01

    Full Text Available Collection of data from animals for research purposes can negatively impact target or by-catch species if suitable animal ethics practices are not followed. This study aimed to assess the ethical requirements of peer-reviewed scientific journals that publish primary literature on fishes, and review the ethical considerations and animal care guidelines of national and international documents on the ethical treatment of animals for research, to provide an overview of the general ethical considerations for field research on fishes. A review of 250 peer-reviewed, ISI-rated journals publishing primary research on fishes revealed that nearly half (46% had no mention of ethics, treatment of animals or ethical requirements for publication in their author guidelines or publication policies. However, 18% of the journals reviewed identify a specific set of ethical guidelines to be followed before publishing research involving animals. Ethical considerations for investigators undertaking field research on fishes, common to most animal care policies, legislation and guiding documents, include adhering to relevant legislation, minimising sample sizes, reducing or mitigating pain and distress, employing the most appropriate and least invasive techniques and accurately reporting methods and findings. This information will provide potential investigators with a useful starting point for designing and conducting ethical field research. Application of ethical best practices in field sampling studies will improve the welfare of study animals and the conservation of rare and endangered species.Conservation implications: This article provides a list of ethical considerations for designing and conducting field research on fishes. By reviewing sampling techniques and processes that are frequently used in field research on fishes and by highlighting the potential negative impacts of these sampling techniques, this article is intended to assist researchers in planning

  16. Design-Based Research

    DEFF Research Database (Denmark)

    Gynther, Karsten; Christensen, Ove; Petersen, Trine Brun

    2012-01-01

    I denne artikel introduceres Design Based Research for første gang på dansk i et videnskabeligt tidsskrift. Artiklen præsenterer de grundlæggende antagelser, som ligger til grund for Design Based Research-traditionen, og artiklen diskuterer de principper, som ligger til grund for gennemførelse af...... et DBR-forskningsprojekt. Med udgangspunkt i forsknings- og udviklingsprojektet ELYK: E-læring, Yderområder og Klyngedannelse, præsenteres den innovationsmodel, som projektet har udviklet med udgangspunkt i Design Based Research traditionen. ELYKs DBR innovationsmodel har vist sig effektiv i forhold...... til projektfremdrift, brugerinvolvering og vidensgenerering, og den vil kunne inspirere andre med interesse i forskningsbaseret udvikling af didaktisk design, der er medieret af digitale teknologier....

  17. Walnut tissue culture: research and field applications

    Science.gov (United States)

    Jose M. Lopez

    2004-01-01

    Vitrotech Biotecnologia Vegetal began researching propagating Juglans regia (English walnut) and various Juglans hybrids by tissue culture in 1993 and has operated on a commercial scale since 1996. Since this time, more than one and a half million walnuts of different species have been propagated and field planted. Tissue cultured...

  18. Data acquisition and preprocessing techniques for remote sensing field research

    Science.gov (United States)

    Biehl, L. L.; Robinson, B. F.

    1983-01-01

    A crops and soils data base has been developed at Purdue University's Laboratory for Applications of Remote Sensing using spectral and agronomic measurements made by several government and university researchers. The data are being used to (1) quantitatively determine the relationships of spectral and agronomic characteristics of crops and soils, (2) define future sensor systems, and (3) develop advanced data analysis techniques. Researchers follow defined data acquisition and preprocessing techniques to provide fully annotated and calibrated sets of spectral, agronomic, and meteorological data. These procedures enable the researcher to combine his data with that acquired by other researchers for remote sensing research. The key elements or requirements for developing a field research data base of spectral data that can be transported across sites and years are appropriate experiment design, accurate spectral data calibration, defined field procedures, and through experiment documentation.

  19. Base Research Program

    Energy Technology Data Exchange (ETDEWEB)

    Everett Sondreal; John Hendrikson

    2009-03-31

    In June 2009, the Energy & Environmental Research Center (EERC) completed 11 years of research under the U.S. Department of Energy (DOE) Base Cooperative Agreement No. DE-FC26-98FT40320 funded through the Office of Fossil Energy (OFE) and administered at the National Energy Technology Laboratory (NETL). A wide range of diverse research activities were performed under annual program plans approved by NETL in seven major task areas: (1) resource characterization and waste management, (2) air quality assessment and control, (3) advanced power systems, (4) advanced fuel forms, (5) value-added coproducts, (6) advanced materials, and (7) strategic studies. This report summarizes results of the 67 research subtasks and an additional 50 strategic studies. Selected highlights in the executive summary illustrate the contribution of the research to the energy industry in areas not adequately addressed by the private sector alone. During the period of performance of the agreement, concerns have mounted over the impact of carbon emissions on climate change, and new programs have been initiated by DOE to ensure that fossil fuel resources along with renewable resources can continue to supply the nation's transportation fuel and electric power. The agreement has addressed DOE goals for reductions in CO{sub 2} emissions through efficiency, capture, and sequestration while expanding the supply and use of domestic energy resources for energy security. It has further contributed to goals for near-zero emissions from highly efficient coal-fired power plants; environmental control capabilities for SO{sub 2}, NO{sub x}, fine respirable particulate (PM{sub 2.5}), and mercury; alternative transportation fuels including liquid synfuels and hydrogen; and synergistic integration of fossil and renewable resources (e.g., wind-, biomass-, and coal-based electrical generation).

  20. 基于三维SAR成像的RCS近远场变换方法研究%Research on Methods of Targets’ RCS Near-field-to-far-field Transformation Based on 3-D SAR Imaging

    Institute of Scientific and Technical Information of China (English)

    张晓玲; 陈明领; 廖可非; 师君; 韦顺军

    2015-01-01

    微波3维成像能够准确地从背景噪声中分离出目标的散射信息,适用于外场目标电磁(EM)散射特性的分析和研究,因而从3维合成孔径雷达(SAR)成像的角度研究目标电磁的散射特性是目前的一个新兴的热门课题。该文以此为背景,首先从Stratton-Chu积分方程出发详细推导3维SAR的近场波数域成像过程,解释3维SAR成像的物理意义;然后阐述基于3维SAR成像的雷达散射截面积(RCS)近远场变换原理,介绍3维SAR图像的散射中心提取方法,给出基于3维SAR成像的RCS近远场变换算法;最后通过FEKO软件进行了仿真实验,得到了5个点目标的RCS近远场变换的方位特性曲线和频率特性曲线,并通过与理论情况的对比,验证该算法在RCS近远场变换技术中的有效性。%Microwave 3-D imaging technique can accurately separate and extract the attractive targets from the background noise. So it can be utilized to analyze and study the ElectroMagnetic (EM) scattering characteristics of the outfield targets. Thus researching the EM scattering characteristics of targets from the perspective of 3-D SAR imaging is becoming an emerging hot field. Based on the background above, firstly, the near field 3-D imaging process in wave-number domain is deduced from the Stratton-Chu integral equation and the physical meaning of 3-D SAR imaging is explained. Then, the principle of targets’ Radar Cross Section (RCS) Near-Field-to-Far-Field Transformation (NFFFT) based on 3-D SAR imaging is elaborated and the method of scattering center extraction from 3-D SAR image is introduced and the algorithm of targets’ RCS NFFFT based on 3-D SAR imaging technique is presented. Finally, though some experiments using the FEKO software, five scattering points’ observing angle characteristic curve and frequency characteristic curve are gotten. Through the comparative experiments with the ideal situation, the effectiveness of the RCS

  1. Styles of Research and Scientific Self-Images of Researchers in Four Socio-Behavioral Fields.

    Science.gov (United States)

    Haim, Gabriel

    This study explored competition and styles of research in the fields of education, political science, sociology, and psychology. The paper is based on a theory which considers science as a competitive activity. Basic, non-applied, experimental, and "high qualitative" research styles are considered more advantageous to competition because (1) they…

  2. RESEARCH ON INDOOR ELECTROMAGNETIC RADIATION FIELD OF MULTIPLE ANTENNA SYSTEM

    Institute of Scientific and Technical Information of China (English)

    Ma Li; Lu Yanhui; Zou Peng; Zhou Xiaoping

    2012-01-01

    The complexity of the indoor environment brings great challenges to predict the electromagnetic radiation field of multiple antenna systems.Based on the Finite Difference Time Domain (FDTD) algorithm,using the mobile phone shielding device as the multiple antenna systems example,the mobile phone shielding device's indoor electromagnetic radiation field is researched by measurment method and simulation method.The effectivity of prediction method is verified by comparing the prediciton results with the measurment results.About 80% of the error can be controlled less than ±4 dB.The quantitative research has certain guiding significance to the prediction of the multiple antenna systems radio wave propagation.

  3. ‘"Education-based Research"

    DEFF Research Database (Denmark)

    Degn Johansson, Troels

    This paper lays out a concept of education-based research-the production of research knowledge within the framework of tertiary design education-as an integration of problem-based learning and research-based education. This leads to a critique of reflective practice as the primary way to facilitate...... learning at this level, a discussion of the nature of design problems in the instrumentalist tradition, and some suggestions as to how design studies curricula may facilitate education-based research....

  4. Field Research in the Teaching of Undergraduate Soil Science

    Science.gov (United States)

    Brevik, Eric C.; Senturklu, Songul; Landblom, Douglas

    2015-04-01

    Several studies have demonstrated that undergraduate students benefit from research experiences. Benefits of undergraduate research include 1) personal and intellectual development, 2) more and closer contact with faculty, 3) the use of active learning techniques, 4) creation of high expectations, 5) development of creative and problem-solving skills, 6) greater independence and intrinsic motivation to learn, and 7) exposure to practical skills. The scientific discipline also benefits, as studies have shown that undergraduates who engage in research experiences are more likely to remain science majors and finish their degree program (Lopatto, 2007). Research experiences come as close as possible to allowing undergraduates to experience what it is like to be an academic or research member of their profession working to advance their discipline. Soils form in the field, therefore, field experiences are very important in developing a complete and holistic understanding of soil science. Combining undergraduate research with field experiences can provide extremely beneficial outcomes to the undergraduate student, including increased understanding of and appreciation for detailed descriptions and data analysis as well as an enhanced ability to see how various parts of their undergraduate education come together to understand a complex problem. The experiences of the authors in working with undergraduate students on field-based research projects will be discussed, along with examples of some of the undergraduate research projects that have been undertaken. In addition, student impressions of their research experiences will be presented. Reference Lopatto, D. 2007. Undergraduate research experiences support science career decisions and active learning. CBE -- Life Sciences Education 6:297-306.

  5. 基于CFD的液压滑阀阀口处流场研究%Research of flow field in orifice of hydraulic spool valve based on CFD

    Institute of Scientific and Technical Information of China (English)

    王辉; 潘生根

    2013-01-01

    The numerical simulation computation of flow field in a conical spool valve was carried,which was based on CFD approach. The simulation results of flow field distribution under fixed condition were analyzed,and the influence of opening and structural parameters of valve port on the flow field distribution in valve port were also analyzed and compared. The results show that the fluid flows complicatedly in valve port ,the flow field distribution is uneven in the axial and radial and affected by the opening and structural parameters of valve port; optimizing the structural parameters of valve port and changing the valve opening can improve the flow field distribution in valve port, prevent the cavitation and the vortex forming and developing, reduce pressure loss and energy consumption.%采用CFD方法对一种锥形阀口滑阀内流场进行了数值仿真计算,分析了在固定条件下其阀口处流场分布情况,并从阀口开度及结构参数等方面对影响阀口处流场分布进行了分析比较.研究结果表明:其阀口处流体流动情况复杂,流场在其轴向及径向分布不均衡,受阀口开度及结构参数等方面的影响;可通过优化阀口结构参数,改变阀口开度来改善阀口处流场分布状况,抑制气穴及旋涡的产生与发展,减小压降及能耗.

  6. RESEARCH ON THE RECONDITIONING METAL SPRAYING ULTRASONIC FIELDS

    Directory of Open Access Journals (Sweden)

    GHEORGHE AMZA

    2015-05-01

    Full Text Available The paper presents research on process optimization of metal spraying activated ultrasonic fields. In order to optimize process parameters are selected metal spraying flame and flame wire electrode with and without ultrasonic activation. It then makes an analysis of the chemical composition resulting filler material, line and base material for more couplers materials. It also presents the resulting the couple main functional properties for metal oxy-fuel flame spraying and wire electrode with and without activating ultrasonic wire electrode to highlight the advantages of metal spraying process in ultrasonic field.

  7. New light field camera based on physical based rendering tracing

    Science.gov (United States)

    Chung, Ming-Han; Chang, Shan-Ching; Lee, Chih-Kung

    2014-03-01

    Even though light field technology was first invented more than 50 years ago, it did not gain popularity due to the limitation imposed by the computation technology. With the rapid advancement of computer technology over the last decade, the limitation has been uplifted and the light field technology quickly returns to the spotlight of the research stage. In this paper, PBRT (Physical Based Rendering Tracing) was introduced to overcome the limitation of using traditional optical simulation approach to study the light field camera technology. More specifically, traditional optical simulation approach can only present light energy distribution but typically lack the capability to present the pictures in realistic scenes. By using PBRT, which was developed to create virtual scenes, 4D light field information was obtained to conduct initial data analysis and calculation. This PBRT approach was also used to explore the light field data calculation potential in creating realistic photos. Furthermore, we integrated the optical experimental measurement results with PBRT in order to place the real measurement results into the virtually created scenes. In other words, our approach provided us with a way to establish a link of virtual scene with the real measurement results. Several images developed based on the above-mentioned approaches were analyzed and discussed to verify the pros and cons of the newly developed PBRT based light field camera technology. It will be shown that this newly developed light field camera approach can circumvent the loss of spatial resolution associated with adopting a micro-lens array in front of the image sensors. Detailed operational constraint, performance metrics, computation resources needed, etc. associated with this newly developed light field camera technique were presented in detail.

  8. Mars Analogue Field Research and Sample Analysis

    Science.gov (United States)

    Foing, Bernard H.

    2016-07-01

    We describe results from the data analysis from a series of field research campaigns (ILEWG EuroMoonMars campaigns 2009 to 2016) in the Utah desert and in other extreme environments (Iceland, Eifel, La Reunion) relevant to habitability and astrobiology in Mars environments, and in order to help in the interpretation of Mars missions measurements from orbit (MEX, MRO) or from the surface (MER, MSL). We discuss results relevant to the scientific study of the habitability factors influenced by the properties of dust, organics, water history and the diagnostics and characterisation of microbial life. We also discuss perspectives for the preparation of future lander and sample return missions. We deployed at Mars Desert Research station, Utah, a suite of instruments and techniques including sample collection, context imaging from remote to local and microscale, drilling, spectrometers and life sensors. We analyzed how geological and geochemical evolution affected local parameters (mineralogy, organics content, environment variations) and the habitability and signature of organics and biota. We find high diversity in the composition of soil samples even when collected in close proximity, the low abundances of detectable PAHs and amino acids and the presence of biota of all three domains of life with significant heterogeneity. An extraordinary variety of putative extremophiles was observed. A dominant factor seems to be soil porosity and lower clay-sized particle content. A protocol was developed for sterile sampling, contamination issues, and the diagnostics of biodiversity via PCR and DGGE analysis in soils and rocks samples. We compare campaign results from 2009-2013 campaigns in Utah and other sites to new measurements concerning: the comparison between remote sensing and in-situ measurements; the study of minerals; the detection of organics and signs of life.

  9. Research of component-based software development approach in RFID field%RFID领域软件构件化开发技术研究

    Institute of Scientific and Technical Information of China (English)

    徐孟娟; 杨威

    2012-01-01

    将软件构件化开发技术应用至RFID领域.基于领域工程的分析方法,对RFID领域内变化性需求进行封装、隔离和抽象,分析出RFID体系架构,提炼出RFID软件构件模型。针对构件的管理,研究了RFID构件的分类方法,提出刻面分类法.并详细描述RFID软件构件分类的刻面及每个刻面的术语空间。%Component-based software development approach had been applied in RFID field in this paper. Based on the analysis method of domain engineering, to encapsulate isolate and abstract the demands within the area of RFID , the RFID software component model had been extracted after its architecture was analyzed. For the management of the component, faceted classification method, a detailed description of the space and each facet terms of RFID software component had been given in the paper.

  10. Research Article Abstracts and Introductions: A Comparative Genre-Based Study of Arabic and English in the Fields of Educational Psychology and Sociology

    Science.gov (United States)

    Alotaibi, Hmoud

    2013-01-01

    The genre of the research article has attracted the attention of researchers, particularly after the research conducted by Swales (1981). In 1990, Swales introduced the Create a Research Space (CARS) model which consists of three rhetorical moves (i.e. units): Move 1: creating a research territory, Move 2: establishing a niche, and Move 3:…

  11. Arguing Challenges to Validity in Field Research: A Realist Perspective.

    Science.gov (United States)

    Elsworth, Gerald R.

    1994-01-01

    Discusses the importance of field methods in education and social research. Highlights include the argument against antinaturalism; scientific realism and social science; challenges to the validity of inferences from field studies; and threats to the validity of field research. (Contains 52 references.) (LRW)

  12. Equating Research Production in Different Scientific Fields.

    Science.gov (United States)

    Alvarez, Pedro; Pulgarin, Antonio

    1998-01-01

    Diffusion in a scientific field is regarded as the dissemination of knowledge, channeled through citations distributed over different periods of time and propagated via scientific journals. Here it is considered to be a latent variable defined by a set of citations used in different fields; the Quantum Measurement technique is used to measure that…

  13. Development of a protection system for research reactor based in Field Programmable Gate Array - FPGA; Desenvolvimento de sistema de protecao para reator nuclear de pesquisa baseado em Field Programmable Gate Array - FPGA

    Energy Technology Data Exchange (ETDEWEB)

    Martins, Roque Hudson da Silva

    2016-07-01

    This study presents a implementation purpose of a protection system for research nuclear reactors by using a programed device FPGA (Field Programmable Gate Array). As well as logic protection method involved on an automatic shutdown (TRIP) of a reactor, that ensure the security on such systems. These new control and operation mechanics are developed to guarantee that the security limits of a power plant are not exceeded, these mechanics can work isolated or in groups to safe guard the security levels. For this implementation to be completed, there will be presented the main aspects and concepts referred to protection systems, mostly about research nuclear reactors, with some applications terms exposed. The system proposed at this paper was developed following the VHDL (Very High Speed Integrated Circuits) hardware describing language, and the Modelsim software from Altera Software to program the automatic turning off routines, and hypothetical simulations for such. The results show that for every software application for supporting nuclear reactors, like security devices, they have to meet the IEC 60880 criteria. This paper have great importance, seeing that nuclear reactor security systems, are a basic element for ensure the reactor security. (author)

  14. 基于PLC的脉冲电场控制系统的研制%Research on the control system of pulse electric field based on PLC

    Institute of Scientific and Technical Information of China (English)

    李伟光; 聂小军

    2012-01-01

    PLC is a control unit which is widely used in industry with the characteristics of simple pro- gramming,powerful controlling function and reliable runningWhile touching screen is a human machine interface applied commonly in industry with characteristics of visualized interface,simple operation and high working stability so that man-machine delivery is achievedAn automatic control system based on PLC for pulse electric field was discussedAt first,the machine working process was stated and the function plan was made for this controlling system based on the process.Then the hardware was designed based on the controlling function with PLC being used as the controlling kerneLMoreover ,the touching screen was used to realize the good information exchange between the machine and humanAt the end,the operation interface of touching screen and the control procedure of PLC were designedThe whole system is simple in structure,high in working stability and convenient in adjustment that can meet the operating requirement well%PLC是工业上广泛使用的控制单元,具有编程简单、功能强大、运行可靠等优点.而触摸屏是工业上常用的人机界面,具有界面直观、操作方便、工作稳定等特点,能较好地实现人机交付的功能.主要探讨了一种基于PLC的自动控制系统,用于对脉冲电场的自动控制.首先,描述了设备的工作过程,根据工作过程对设备的控制系统进行了详细的功能规划.然后,结合系统要实现的功能设计了系统的硬件结构,选择PLC作为系统的控制核心,同时选择触摸屏与PLC配合,实现良好的人机交付.最后,设计了触摸屏的操作界面和PLC的控制程序.整个系统结构简单,工作可靠,调整方便,能较好地满足使用要求.

  15. A change management framework for macroergonomic field research.

    Science.gov (United States)

    Holden, Richard J; Or, Calvin K L; Alper, Samuel J; Joy Rivera, A; Karsh, Ben-Tzion

    2008-07-01

    With the proliferation of macroergonomic field research, it is time to carefully examine how such research should be managed and implemented. We argue that the importance of attending to high-quality implementation of field research is equal to that of methodological rigor. One way to systematically manage the implementation process is to adopt a change management framework, wherein the research project is conceptualized as an instance of organization-level change. Consequently, principles for successful organization-level change from the literature on change management can be used to guide successful field research implementation. This paper briefly reviews that literature, deriving 30 principles of successful change management, covering topics such as political awareness, assembling the change team, generating buy-in, and management support. For each principle, corresponding suggestions for macroergonomic field research practice are presented. We urge other researchers to further develop and adopt frameworks that guide the implementation of field research.

  16. Cultivating Kuumba: Applying Art Based Strategies to Any Field

    Science.gov (United States)

    Ellis, Auburn Elizabeth

    2015-01-01

    There are many contemporary issues to address in adult education. This paper explores art-based strategies and the utilization of creativity (Kuumba) to expand learning for global communities in any field of practice. Benefits of culturally grounded approaches to adult education are discussed. Images from ongoing field research can be viewed at…

  17. DOE research and development and field facilities

    Energy Technology Data Exchange (ETDEWEB)

    1979-06-01

    This report describes the roles of DOE's headquarters, field offices, major multiprogram laboratories, Energy Technology and Mining Operations Centers, and other government-owned, contractor-operated facilities which are located in all regions of the United States. It gives brief descriptions of resources, activities, and capabilities of each field facility (sections III through V). These represent a cumulative capital investment of $12 billion and involve a work force of approximately 12,000 government (field) employees and approximately 100,000 contractor employees.

  18. Inspiring the Next Generation of Scientists: Building on 52 Years of Tradition in Diatom Research with Open-Source, Web-Based Collaboration Tools and Online Resources in a Field Course for High School Students

    Science.gov (United States)

    Howard, K. L.; Lee, S. S.

    2015-12-01

    Open-source, web-based forums and online resources can be used to develop a collaborative, active-learning approach for engaging and training students in the scientific process. We used the Diatoms of the United States website as an online resource for diatom taxonomy and developed a Google+ class community to serve as a platform for high school students to learn about research in diatom taxonomy, community ecology and diatom applications to the earth sciences. Ecology and Systematics of Diatoms is a field course that has been taught at the undergraduate and graduate levels at the Iowa Lakeside Lab field station for 52 years, beginning with the Diatom Clinic in 1963. Freshwater diatom education at Lakeside Lab has since evolved into a foundational training course attracting budding diatomists from all over the world, and has grown to include a week-long course for high school students. Successful since 2012, the high school course is now offered for college credit (University of Iowa), and covers methods of diatom specimen collection and preparation, microscopy, identification of diatom genera, diatom ecology, applications of diatom research, and an introduction to data analysis incorporating multivariate statistics (ordination) using the R statistical program, as well as primary scientific literature. During the 2015 course, students contributed to a Google+ class community where they posted images, data, and questions. The web-based platform allowed students to easily share information and to give and receive feedback from both peers and instructors. Students collaborated via the Google+ community and used the Diatoms of the United States website to develop a taxonomic reference for a field-based group research project, simulating how an actual diatom research program would develop a region or project-specific flora harmonized across analysts. Students investigated the taxonomy and ecology of diatom epiphytes on the green alga Cladophora from the littoral zone of

  19. Lessons in collaboration and effective field research from the Appalachian Headwaters Research Experience for Undergraduates Program

    Science.gov (United States)

    Jones, A. L.; Fox, J.; Wilder, M. S.

    2009-12-01

    In the summer of 2009, the authors launched year one of a three-year National Science Foundation-funded Research Experience for Undergraduates entitled "Carbon Storage and Headwater Health in the Appalachian Headwaters." Eight undergraduates selected from a nationally competitive field of more than 60 applicants participated in the ten-week field- and laboratory-based program along with three middle- and high-school teachers. Each student developed and completed an independent research project related to coal mining’s impact on soil organic carbon and sediment transport processes. Specifically, they used isotope ratio mass spectrometry to measure the carbon and nitrogen stable isotopic signature of soils and sediments in the Appalachian headwater landscapes and first order streams of Kentucky's southeastern coalfields. Among the program's innovative features was its fundamentally collaborative nature--which was represented in several ways. First, the background of the three program leaders was very different: an environmental planner with an academic background in land use planning and administration (Jones); a civil engineer trained in biogeochemistry and watershed modeling (Fox); and an environmental educator experienced in both formal and nonformal educator training and certification (Wilder). The program was also a collaboration between a Carnegie 1 research-oriented institution and an undergraduate/ teaching -focused regional comprehensive university. Finally, the participants themselves represented a diversity of disciplines and institutional backgrounds--including biology, geology, chemistry, environmental science and civil engineering. The Research Experience for Teachers component was another innovative program element. The teachers participated in all field and laboratory research activities during the first six weeks, then developed a unit of study for their own classrooms to be implemented during the current school year. In addition to the six

  20. Current status of the polyamine research field.

    Science.gov (United States)

    Pegg, Anthony E; Casero, Robert A

    2011-01-01

    This chapter provides an overview of the polyamine field and introduces the 32 other chapters that make up this volume. These chapters provide a wide range of methods, advice, and background relevant to studies of the function of polyamines, the regulation of their content, their role in disease, and the therapeutic potential of drugs targeting polyamine content and function. The methodology provided in this new volume will enable laboratories already working in this area to expand their experimental techniques and facilitate the entry of additional workers into this rapidly expanding field.

  1. Joint research and evaluation work in the field of fire

    Energy Technology Data Exchange (ETDEWEB)

    Gonzalez, R.; Such, J.M.; Casselman, C. [CEA Cadarache, Institut de Protection et de Surete Nucleaire, Dept. de Recherches en Securite, 13 - Saint Paul Lez Durance (France); Laborde, J.C. [CEA Saclay, Dept. de Prevention et d' Etudes des Accidents, 91 - Gif sur Yvette (France); Bertrand, R.; Blot, M.; Chaussard, M.; Lacoue, J.; Mattei, J.M. [CEA Fontenay-aux-Roses, Dept d' Evaluation de Surete, 92 (France)

    2001-07-01

    In general, any assessment concerning the safety of nuclear facilities is based on acquired scientific knowledge. Nevertheless, some areas related to safety remain still inadequately explored, knowledge in these areas needs to be further developed either through the results obtained from studies or from experimental research. With the aim of achieving an optimal safety level, one of IPSN's main tasks is to highlight these gags in current knowledge and point out to nuclear facility operators the need to fill them. These general considerations are pertinent to the particular field of fire. At IPSN, safety assessment activities and research are carried out side-by-side, thus facilitating the implementation of corresponding research programs. This ability to orient research with respect to safety assessment requirements, the contribution of research scientists to safety assessment or the formulation of safety problems, are today counted among the strong points of IPSN operation. This paper presents also the present main fire risk safety concerns for Nuclear Power Plants and the associated research carried out by IPSN (past, underway and future) to improve the scientific knowledge in the related areas. (authors)

  2. A Comprehensive Literature Review of the ERP research field

    DEFF Research Database (Denmark)

    Kræmmergaard, Pernille; Schlichter, Bjarne Rerup

    of this paper is to address these questions, which is done by providing an overview of the Enterprise Resource Planning (ERP) research field regardless of research discipline, research topic and research traditions. Abstracts from 723 peer-reviewed journal publications from 2000 up till 2007 have been analyzed...

  3. Conducting Field Research on Terrorism: a Brief Primer

    Directory of Open Access Journals (Sweden)

    Adam Dolnik

    2011-05-01

    Full Text Available This article focuses on the practical aspects of field research on terrorism. Firstly, it  outlines some issues involved in the process of attaining a human research ethics/institutional review board clearance in order to be able to even begin the field research. It suggests some ways in which researchers can positively influence this review process in their favor. Secondly, the article focuses on the real and perceived dangers of field research, identifying practical steps and preparatory activities that can help researchers manage and reduce the risks involved. The article also covers the formalities and dilemmas involved in gaining access to the field. It then provides some insights into the topic of operating in conflict zones, followed by a section covering the ways of gaining access to sources, effective communication skills and influence techniques and addresses key issues involved in interviewing sources in the field. The final section focuses on identifying biases and interfering factors which researchers need to take into account when interpreting the data acquired through interviews. This article is a modest attempt to fill a gap in the literature on terrorism research by outlining some of the key issues involved in the process of doing field research. It incorporates insights from diverse disciplines as well as the author’s personal experiences of conducting field research on terrorism in places like Afghanistan, Pakistan, Chechnya, Ingushetia, Colombia, Mindanao, Uganda, Indonesia, Democratic Republic of Congo, Sudan, and India.

  4. Knowledge-based flow field zoning

    Science.gov (United States)

    Andrews, Alison E.

    1988-01-01

    Automation flow field zoning in two dimensions is an important step towards easing the three-dimensional grid generation bottleneck in computational fluid dynamics. A knowledge based approach works well, but certain aspects of flow field zoning make the use of such an approach challenging. A knowledge based flow field zoner, called EZGrid, was implemented and tested on representative two-dimensional aerodynamic configurations. Results are shown which illustrate the way in which EZGrid incorporates the effects of physics, shape description, position, and user bias in a flow field zoning.

  5. Using the Major Field Test for a Bachelor's Degree in Business as a Learning Outcomes Assessment: Evidence from a Review of 20 Years of Institution-Based Research

    Science.gov (United States)

    Ling, Guangming; Bochenek, Jennifer; Burkander, Kri

    2015-01-01

    By applying multilevel models with random effects, the authors reviewed and synthesized findings from 30 studies that were published in the last 20 years exploring the relationship between the Educational Testing Service Major Field Test for a Bachelor's Degree in Business (MFTB) and related factors. The results suggest that MFTB scores correlated…

  6. Interdisciplinarity of Nano Research Fields : A Keyword Mining Approach

    NARCIS (Netherlands)

    Wang, L.; Notten, A.; Surpatean, A.

    2012-01-01

    Using a keyword mining approach, this paper explores the interdisciplinary and integrative dynamics in five nano research fields. We argue that the general trend of integration in nano research fields is converging in the long run, although the degree of this convergence depends greatly on the indic

  7. Researching One's Own Field. Interaction Dynamics and Methodological Challenges in the Context of Higher Education Research

    Directory of Open Access Journals (Sweden)

    Gerlinde Malli

    2015-01-01

    Full Text Available In contrast to quantitative approaches, where interaction effects are usually regarded as errors or disruption, we understand interviews as social situations and the interaction dynamics between interviewee and interviewer as constitutive for data collection and interpretation. We conducted interviews with various actors from the academic field for a research project in higher education research. Based on our field experience we assume that interviews also offer opportunities for the respondents to present themselves in a discursive process. In this article we first show that many of our interviewees perceived us as evaluators. We argue that the interviewees' self-presentations and rhetorical strategies were shaped by the evaluative and competitive environment in which they took place, i.e. that of the entrepreneurial university. Furthermore we sum up various types of interactive effects which can occur when researchers interview actors with a higher status in the academic field. These research up-effects as well as the interviewees' perception of us as evaluators influenced both how and what they told us as well as what they kept silent. Therefore we plead that researchers should look out more carefully for interaction dynamics when interpreting data, as they also might be pointers to tensions, conflicts or opposing perspectives. URN: http://nbn-resolving.de/urn:nbn:de:0114-fqs1501111

  8. Phenoliner: A New Field Phenotyping Platform for Grapevine Research.

    Science.gov (United States)

    Kicherer, Anna; Herzog, Katja; Bendel, Nele; Klück, Hans-Christian; Backhaus, Andreas; Wieland, Markus; Rose, Johann Christian; Klingbeil, Lasse; Läbe, Thomas; Hohl, Christian; Petry, Willi; Kuhlmann, Heiner; Seiffert, Udo; Töpfer, Reinhard

    2017-07-14

    In grapevine research the acquisition of phenotypic data is largely restricted to the field due to its perennial nature and size. The methodologies used to assess morphological traits and phenology are mainly limited to visual scoring. Some measurements for biotic and abiotic stress, as well as for quality assessments, are done by invasive measures. The new evolving sensor technologies provide the opportunity to perform non-destructive evaluations of phenotypic traits using different field phenotyping platforms. One of the biggest technical challenges for field phenotyping of grapevines are the varying light conditions and the background. In the present study the Phenoliner is presented, which represents a novel type of a robust field phenotyping platform. The vehicle is based on a grape harvester following the concept of a moveable tunnel. The tunnel it is equipped with different sensor systems (RGB and NIR camera system, hyperspectral camera, RTK-GPS, orientation sensor) and an artificial broadband light source. It is independent from external light conditions and in combination with artificial background, the Phenoliner enables standardised acquisition of high-quality, geo-referenced sensor data.

  9. Research-based standards for accessible housing

    DEFF Research Database (Denmark)

    Helle, Tina; Iwarsson, Susanne; Brandt, Åse

    2010-01-01

    by the database search (n= 2,577), resulting in the inclusion of one publication. Contacts to leading researchers in the field identified five publications. The hand search of 22 journals led to one publication. We have exemplified how the prevalence of common environmental problems in housing environments......Since standards for accessible housing seldom are manifestly based on research and vary cross nationally, it is important to examine if there exists any scientific evidence, supporting these standards. Thus, one aim of this study was to review the literature in search of such scientific evidence...... to inform research-based accessibility standards is available?, a descriptive literature review was conducted. The studies should be empirically based, published during 1990 to 2010, target adult persons, published in peer reviewed journals or, as architectural competitions, PhD-thesis or conference...

  10. Research of Magnetic Field Measurements Based on Hall-Effect%基于霍尔效应的磁场测量方法的研究

    Institute of Scientific and Technical Information of China (English)

    渠珊珊; 何志伟

    2013-01-01

    设计了用霍尔效应法测量磁场的实验方法。测量电路以霍尔元件5303为核心器件,通过改变霍尔元件的输入参数及测量位置,验证了霍尔效应理论及所测磁场的特性。实验表明,该方法可有效测量通电长直螺线管中的磁场分布,从实验角度验证霍尔效应理论。%This paper designed a magnetic field measurement method using Hall-effect, which selected the Hall element 5303 as the key electronic component; and verified the Hall-effect theory and the characteristic of the measured magnetic field by changing the input parameters of the Hall element and the measure point. The experiment proved that this method can measure the magnetic field distribution of the power solenoid effectively and verify the Hall-effect theory from the experimental point.

  11. A Comprehensive Literature Review of the ERP research field

    DEFF Research Database (Denmark)

    Kræmmergaard, Pernille; Schlichter, Bjarne Rerup

    of this paper is to address these questions, which is done by providing an overview of the Enterprise Resource Planning (ERP) research field regardless of research discipline, research topic and research traditions. Abstracts from 723 peer-reviewed journal publications from 2000 up till 2007 have been analyzed...... and with an End-Note-database1 containing bibliographical data to be used in future research....

  12. Research on the ElectromagneticScattering Near the Field

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    We calculate and analyze the scattering near the field from some simple and complex targets using the method of picture elements (PEL), based upon the method of high-frequency approximation. It introduces the critical distance of the near field and the far field which is related with the dimension of the target. The problem of the EMS near field from large size objects can be transformed to the problem of the far field by parting it to many very small size elements. By calculating the EMS near fields of some simple and complex targets based on the SCTE (scattering from complex targets and environments) system, the results show that there are much difference between the near field and the far field. And the characteristics of the near field are more complicated. This work has practical engineering value in the area of the electromagnetic compatibility (EMC), electromagnetic interference (EMI) prediction and electromagnetic scattering (EMS).

  13. Wave Superposition Based Sound Field Reconstruction

    Institute of Scientific and Technical Information of China (English)

    LI Jia-qing; CHEN Jin; YANG Chao

    2008-01-01

    In order to overcome the obstacle of singular integral in boundary element method (BEM), wepresented an efficient sound field reconstruction technique based on the wave superposition method (WSM). Itsprinciple includes three steps: first, the sound pressure field of an arbitrary shaped radiator is measured witha microphone array; then, the exterior sound field of the radiator is computed backward and forward using theWSM; at last, the final results are visualized in terms of sound pressure contours or animations. With thesevisualized contours or animations, noise sources can be easily located and quantified; also noise transmissionpath can be found out. By numerical simulation and experimental results, we proved that the technique aresuitable and accurate for sound field reconstruction. In addition, we presented a sound field reconstruction sys-tem prototype on the basis of this technique. It makes a foundation for the application of wave superpositionin the sound field reconstruction in industry situations.

  14. Genomics-based plant germplasm research (GPGR

    Directory of Open Access Journals (Sweden)

    Jizeng Jia

    2017-04-01

    Full Text Available Plant germplasm underpins much of crop genetic improvement. Millions of germplasm accessions have been collected and conserved ex situ and/or in situ, and the major challenge is now how to exploit and utilize this abundant resource. Genomics-based plant germplasm research (GPGR or “Genoplasmics” is a novel cross-disciplinary research field that seeks to apply the principles and techniques of genomics to germplasm research. We describe in this paper the concept, strategy, and approach behind GPGR, and summarize current progress in the areas of the definition and construction of core collections, enhancement of germplasm with core collections, and gene discovery from core collections. GPGR is opening a new era in germplasm research. The contribution, progress and achievements of GPGR in the future are predicted.

  15. Field research with underserved minorities: The ideal and the real

    OpenAIRE

    Stiffman, Arlene Rubin; Freedenthal, Stacey; Brown, Eddie; Ostmann, Emily; Hibbeler, Patricia

    2005-01-01

    The realities of doing field research with high-risk, minority, or indigenous populations may be quite different than the guidelines presented in research training. There are overlapping and competing demands created by cultural and research imperatives. A National Institute on Drug Abuse (NIDA)-funded study of American Indian youth illustrates competing pressures between research objectives and cultural sensitivity. This account of the problems that were confronted and the attempts made to r...

  16. Relationships among structural empowerment, psychological empowerment, intent to stay and burnout in nursing field in mainland China-based on a cross-sectional questionnaire research.

    Science.gov (United States)

    Meng, Lina; Liu, Yanhui; Liu, Hongwei; Hu, Yu; Yang, Jipeng; Liu, Jingying

    2015-06-01

    The aim of the study was to explore the relationship among perceived structural empowerment, psychological empowerment, burnout and intent to stay by nurses in mainland China.With the shortage of nurses in many countries, including China, intent to stay is a dominant factor to influence the quality of care. Also, burnout is identified to negatively affect the quality of care. Empowered clinical nurse practical environment is related to intent to stay and burnout. In the current literature, there is a lack of data based on empowering environment discussing the relationship between burnout and intent to stay. The study used an anonymous questionnaire, filled voluntarily by 219 nurses from different sections in a city in mainland China, 2012.Structural equation modelling (SEM) was used to test the proposed hypotheses. Based on the SEM model, structural empowerment and psychological empowerment had significant positive effects on intent to stay of nurses and negative effects on burnout. Burnout had a significant negative effect on intent to stay. The final modified models yielded χ(2)  = 58.580, P > 0.05, χ(2) /df = 1.046, root mean square error of approximation = 0.015, Tucker-Lewis Index = 0.996, comparative fit index = 0.998,which indicated good fit indices. Creating a positive empowering workplace can encourage nurses to stay long and prevent burnout. Therefore, higher level of empowering environment is required.

  17. Collaborative field research and training in occupational health and ergonomics.

    Science.gov (United States)

    Kogi, K

    1998-01-01

    Networking collaborative research and training in Asian developing countries includes three types of joint activities: field studies of workplace potentials for better safety and health, intensive action training for improvement of working conditions in small enterprises, and action-oriented workshops on low-cost improvements for managers, workers, and farmers. These activities were aimed at identifying workable strategies for making locally adjusted improvements in occupational health and ergonomics. Many improvements have resulted as direct outcomes. Most these improvements were multifaceted, low-cost, and practicable using local skills. Three common features of these interactive processes seem important in facilitating realistic improvements: 1) voluntary approaches building on local achievements; 2) the use of practical methods for identifying multiple improvements; and 3) participatory steps for achieving low-cost results first. The effective use of group work tools is crucial. Stepwise training packages have thus proven useful for promoting local problem-solving interventions based on voluntary initiatives.

  18. Sociology of International Education--An Emerging Field of Research

    Science.gov (United States)

    Resnik, Julia

    2012-01-01

    This article points to international education in elementary and post-elementary schools as an emerging and promising field of enquiry. It describes the state of art of this new field and sets out the nature of the research. The rapid development of international networks in recent decades; the contribution of international education policies to…

  19. Wavelet-Based Quantum Field Theory

    Directory of Open Access Journals (Sweden)

    Mikhail V. Altaisky

    2007-11-01

    Full Text Available The Euclidean quantum field theory for the fields $phi_{Delta x}(x$, which depend on both the position $x$ and the resolution $Delta x$, constructed in SIGMA 2 (2006, 046, on the base of the continuous wavelet transform, is considered. The Feynman diagrams in such a theory become finite under the assumption there should be no scales in internal lines smaller than the minimal of scales of external lines. This regularisation agrees with the existing calculations of radiative corrections to the electron magnetic moment. The transition from the newly constructed theory to a standard Euclidean field theory is achieved by integration over the scale arguments.

  20. Research of Cloud Services Library Based on Specific Field%基于特定领域云服务库的研究

    Institute of Scientific and Technical Information of China (English)

    叶枫; 王志坚; 娄渊胜; 赵鹏飞; 沈一尘

    2012-01-01

    云计算的兴起,将Web服务的应用推上了更为广阔的平台,云服务通常被设计成Web服务,云服务化日趋得到关注.在云计算范型下,为解决云服务的语义信息更新、扩充困难,确保服务质量和按需的资源使用以及能高效地检索、管理云服务,论文结合水利领域业务,提出并实现了一个云服务库来管理各类基于水利业务的云服务,其中采用本体、元数据技术描述云服务的刻面及属性,开发了刻面动态生成机制便于增加新的刻面,进而扩展云服务的语义信息.当前,该云服务库已在多个项目中应用,展现了良好的应用效果.%The rise of cloud computing pushes web services applications to a broader platform.Cloud services are typically designed as web services and gain more attention increasingly.In order to update and expand the semantic information of cloud services,ensure quality of service and on-demand use of resources,and efficiently retrieve and manage cloud services,the paper proposes and implements a solution of cloud service library to manage a variety of cloud services which are based on water business.In the cloud service library,ontologies and metadata technology are used to formalize and depict facts and properties of cloud services,and the system also includes dynamic facet-generated mechanism to facilitate the addition of new facets,extends the semantic information of cloud services.Now,the cloud services library is applied in many projects and it shows the good application effect.

  1. Astrobiology Field Research in Moon/Mars Analogue Environments: Preface

    Science.gov (United States)

    Foing, B. H.; Stoker, C.; Ehrenfreund, P.

    2011-01-01

    Extreme environments on Earth often provide similar terrain conditions to landing/operation sites on Moon and Mars. Several field campaigns (EuroGeoMars2009 and DOMMEX/ILEWG EuroMoonMars from November 2009 to March 2010) were conducted at the Mars Desert Research Station (MDRS) in Utah. Some of the key astrobiology results are presented in this special issue on Astrobiology field research in Moon/Mars analogue environments relevant to investigate the link between geology, minerals, organics and biota. Preliminary results from a multidisciplinary field campaign at Rio Tinto in Spain are presented.

  2. Multi-Sited Ethnography and the Field of Educational Research

    Science.gov (United States)

    Pierides, Dean

    2010-01-01

    This paper responds to the challenge of how educational research might be practised in a contemporary world that is no longer necessarily organised by nearness and unity. Focusing on ethnography, it argues for what a multi-sited imaginary contributes to research in the field of education. By giving prominence to the notion of multi-sited…

  3. Field Research Studying Whales in an Undergraduate Animal Behavior Laboratory

    Science.gov (United States)

    MacLaren, R. David; Schulte, Dianna; Kennedy, Jen

    2012-01-01

    This work describes a new field research laboratory in an undergraduate animal behavior course involving the study of whale behavior, ecology and conservation in partnership with a non-profit research organization--the Blue Ocean Society for Marine Conservation (BOS). The project involves two weeks of training and five weekend trips on whale watch…

  4. A US Based Ultrafast Interdisciplinary Research Facility

    Science.gov (United States)

    Gueye, Paul; Hill, Wendell; Johnson, Anthony

    2006-10-01

    The US scientific competitiveness on the world arena has substantially decreased due to the lack of funding and training of qualified personnel. Most of the potential workforce found in higher education is composed of foreign students and post-docs. In the specific field of low- and high-field science, the European and Asian communities are rapidly catching-up with the US, even leading in some areas. To remain the leader in ultrafast science and technology, new visions and commitment must be embraced. For that reason, an international effort of more than 70 countries for a US-based interdisciplinary research facility using ultrafast laser technology is under development. It will provide research and educational training, as well as new venues for a strong collaboration between the fields of astrophysics, nuclear/high energy physics, plasma physics, optical sciences, biological and medical physics. This facility will consist of a uniquely designed high contrast multi-lines concept housing twenty experimental rooms shared between four beams:[0.1 TW, 1 kHz], [10 TW, 9 kHz], [100-200 TW, 10 Hz] and [500 TW, 10 Hz]. The detail schematic of this multi-laser system, foreseen research and educational programs, and organizational structure of this facility will be presented.

  5. Assessment of Electromagnetic Fields at NASA Langley Research Center

    Science.gov (United States)

    Ficklen, Carter B.

    1995-01-01

    This report presents the results of an assessment of ElectroMagnetic Fields (EMF) completed at NASA Langley Research Center as part of the Langley Aerospace Research Summer Scholars Program. This project was performed to determine levels of electromagnetic fields, determine the significance of the levels present, and determine a plan to reduce electromagnetic field exposure, if necessary. This report also describes the properties of electromagnetic fields and their interaction with humans. The results of three major occupational epidemiological studies is presented to determine risks posed to humans by EMF exposure. The data for this report came from peer-reviewed journal articles and government publications pertaining to the health effects of electromagnetic fields.

  6. Evolution of Decision Support Systems Research Field in Numbers

    Directory of Open Access Journals (Sweden)

    Ana-Maria SUDUC

    2010-01-01

    Full Text Available The scientific production in a certain field shows, in great extent, the research interests in that field. Decision Support Systems are a particular class of information systems which are gaining more popularity in various domains. In order to identify the evolution in time of the publications number, authors, subjects, publications in the Decision Support Systems (DSS field, and therefore the scientific world interest for this field, in November 2010 there have been organized a series of queries on three major international scientific databases: ScienceDirect, IEEE Xplore Digital Library and ACM Digital Library. The results presented in this paper shows that, even the decision support systems research field started in 1960s, the interests for this type of systems grew exponentially with each year in the last decades.

  7. Knowledge-Based Entrepreneurship in a Boundless Research System

    Science.gov (United States)

    Dell'Anno, Davide

    2008-01-01

    International entrepreneurship and knowledge-based entrepreneurship have recently generated considerable academic and non-academic attention. This paper explores the "new" field of knowledge-based entrepreneurship in a boundless research system. Cultural barriers to the development of business opportunities by researchers persist in some academic…

  8. Knowledge-Based Entrepreneurship in a Boundless Research System

    Science.gov (United States)

    Dell'Anno, Davide

    2008-01-01

    International entrepreneurship and knowledge-based entrepreneurship have recently generated considerable academic and non-academic attention. This paper explores the "new" field of knowledge-based entrepreneurship in a boundless research system. Cultural barriers to the development of business opportunities by researchers persist in some academic…

  9. On multiplying methods in the field of research evaluation

    Energy Technology Data Exchange (ETDEWEB)

    Derrick, G.; Molas-Gallart, J.; De Rijcke, S.; Meijer, I.; Van der Weijden, I.; Wouters, P.

    2016-07-01

    This special session forms part of a larger program aimed at the multiplication and integration of methodological approaches in the research evaluation and innovation policy field. The session builds on previous initiatives by Gemma Derrick and colleagues at CWTS, INGENIO, the Rathenau Instituut and SPRU, exploring the advantages of qualitative methodological tools at the STI/ENID conference in Lugano, and an international workshop in London in October 2015. The program is highly topical: the research evaluation field is currently reconsidering its methodological foundations in light of new research questions arising from policy initiatives regarding a) the move toward open science; b) a reconceptualization of research excellence to include societal relevance; c) diversification of academic careers, and d) the search for indicators showcasing responsible research behavior and innovation. This new special session at STI2016 will advance and broaden the scope of previous initiatives by building bridges between cutting edge research involving quantitative, qualitative, and mixed methodological research designs. Bringing together leading experts and promising researchers with distinctive methodological skill-sets, the session will demonstrate the advantages of cross-fertilization between ‘core’ and ‘peripheral’ methodological approaches for the research evaluation and science indicators field. (Author)

  10. Fuzzy logic based ELF magnetic field estimation in substations.

    Science.gov (United States)

    Kosalay, Ilhan

    2008-01-01

    This paper examines estimation of the extremely low frequency magnetic fields (MF) in the power substation. First, the results of the previous relevant research studies and the MF measurements in a sample power substation are presented. Then, a fuzzy logic model based on the geometric definitions in order to estimate the MF distribution is explained. Visual software, which has a three-dimensional screening unit, based on the fuzzy logic technique, has been developed.

  11. 基于大视场光学跟踪测量系统的恒星定向研究%Research of Orientation by Stars Based on Wide Field Optical Tracking and Measuring System

    Institute of Scientific and Technical Information of China (English)

    徐韬祜; 孙华燕; 张廷华; 都琳

    2015-01-01

    针对大视场光学跟踪测量系统提出了一种改进的快速定向的方法,通过拍摄星图,利用恒星确定的世界坐标与相面坐标解算光轴指向对应的方位角,从而实现定向的目的;首先推导了坐标系转换模型,然后分析了影响定向精度的误差因素,再次改进了星图识别算法;最后利用Matlab对提出的定向方法实现了软件化并进行了实验研究;实验结果表明:此方法可以用于大视场光学跟踪测量系统的野外定向。%We provided an orientation method aimed at wide field optical tracking and measuring system. By shooting star images and using stars ’determined world coordinates and pixel coordinates to calculate the azimuth angle that optical axis pointing to,we realized the purpose of the orientation. At first,this pa-per deduced the coordinate transformation model. Then the paper analyzed the factors which affected the accuracy of orientation. Once again the star identification algorithm was improved. Finally,the method proposed was realized based on Matlab and the experimental research was implemented. Experimental re-sults show that the method meets the demand of accuracy and can be used in field orientation of wide field optical tracking and measuring system.

  12. Magnetic field mapper based on rotating coils

    CERN Document Server

    AUTHOR|(CDS)2087244; Arpaia, Pasquale

    This thesis presents a magnetic field mapper based on rotating coils. The requirements, the architecture, the conceptual design, and the prototype for straight magnets were shown. The proposed system is made up of a rotating coil transducer and a train-like system for longitudinal motion and positioning inside magnet bore. The mapper allows a localized measurement of magnetic fields and the variation of the harmonic multipole content in the magnet ends. The proof-of-principle demonstration and the experimental characterization of the rotating-coil transducer specifically conceived for mapping validated the main objective of satisfying the magnetic measurement needs of the next generation of compact accelerators.

  13. Nanotechnology-based approaches in anticancer research.

    Science.gov (United States)

    Jabir, Nasimudeen R; Tabrez, Shams; Ashraf, Ghulam Md; Shakil, Shazi; Damanhouri, Ghazi A; Kamal, Mohammad A

    2012-01-01

    Cancer is a highly complex disease to understand, because it entails multiple cellular physiological systems. The most common cancer treatments are restricted to chemotherapy, radiation and surgery. Moreover, the early recognition and treatment of cancer remains a technological bottleneck. There is an urgent need to develop new and innovative technologies that could help to delineate tumor margins, identify residual tumor cells and micrometastases, and determine whether a tumor has been completely removed or not. Nanotechnology has witnessed significant progress in the past few decades, and its effect is widespread nowadays in every field. Nanoparticles can be modified in numerous ways to prolong circulation, enhance drug localization, increase drug efficacy, and potentially decrease chances of multidrug resistance by the use of nanotechnology. Recently, research in the field of cancer nanotechnology has made remarkable advances. The present review summarizes the application of various nanotechnology-based approaches towards the diagnostics and therapeutics of cancer.

  14. Research on the Field of Education Policy: Exploring Different Levels of Approach and Abstraction

    Science.gov (United States)

    Mainardes, Jefferson; Tello, César

    2016-01-01

    This paper, of theoretical nature, explores the levels of approach and abstraction of research in the field of education policy: description, analysis and understanding. Such categories were developed based on concepts of Bourdieu's theory and on the grounds of epistemological studies focused on education policy and meta-research. This paper…

  15. Security guidelines for field research in complex, remote and hazardous places

    NARCIS (Netherlands)

    D.J.M. Hilhorst (Thea); L. Hodgson (Lucy); B.J. Jansen (Bram); R.A. Mena Fluhmann (Rodrigo)

    2016-01-01

    markdownabstractThese guidelines assist researchers in conducting their field-based research or fieldwork in hazardous, remote or complex environments as safely and securely as possible. Fieldwork comes with risks, ranging from the mundane risks of car accidents to more exceptional risks of

  16. Field research with underserved minorities: the ideal and the real.

    Science.gov (United States)

    Stiffman, Arlene Rubin; Freedenthal, Stacey; Brown, Eddie; Ostmann, Emily; Hibbeler, Patricia

    2005-06-01

    The realities of doing field research with high-risk, minority, or indigenous populations may be quite different than the guidelines presented in research training. There are overlapping and competing demands created by cultural and research imperatives. A National Institute on Drug Abuse (NIDA)-funded study of American Indian youth illustrates competing pressures between research objectives and cultural sensitivity. This account of the problems that were confronted and the attempts made to resolve them will hopefully fill a needed gap in the research literature and serve as a thought-provoking example for other researchers. This study built cross-cultural bridges. Researchers worked as a team with stakeholders to modify the instruments and methods to achieve cultural appropriateness. The researchers agreed to the communities' demands for increased service access and rights of refusal for all publications and presentations. Data indicate that these compromises did not substantially harm the first year of data collection completeness or the well-being of the youth. To the contrary, it enhanced the ability to disseminate results to those community leaders with the most vested interests. The conflicts between ideal research requirements and cultural demands confronted by the researchers and interviewers in the American Indian community were not necessarily different from issues faced by researchers in other communities. Of major import is the recognition that there are no easy answers to such issues within research.

  17. Team Teaching: Integrating Research and Lessons from the Field

    Science.gov (United States)

    2013-11-01

    USSOCOM RESEARCH CONDUCTED BY: SWA CONSULTING INC. Team teaching: Integrating research and lessons from the field Olin , J., & Harman, R. P. (2013...and Contributors: Mr. Hyderhusain Abadin Ms. Lindsey Jeralds Mrs. Cristina Lambert Mr. Jack  Olin Dr. Daniel Stanhope Dr. Eric A. Surface Sponsored by

  18. Natural and Accelerated Bioremediation Research (NABIR) Field Research Center (FRC) Management Plan

    Energy Technology Data Exchange (ETDEWEB)

    Watson, D.B.

    2002-02-28

    The Environmental Sciences Division at Oak Ridge National Laboratory has established a Field Research Center (FRC) to support the Natural and Accelerated Bioremediation Research (NABIR) Program on the U.S. Department of Energy (DOE) Oak Ridge Reservation in Oak Ridge, Tennessee for the DOE Headquarters Office of Biological and Environmental Research within the Office of Science.

  19. Natural and Accelerated Bioremediation Research (NABIR) Field Research Center (FRC) Management Plan

    Energy Technology Data Exchange (ETDEWEB)

    Watson, D.B.

    2002-02-28

    The Environmental Sciences Division at Oak Ridge National Laboratory has established a Field Research Center (FRC) to support the Natural and Accelerated Bioremediation Research (NABIR) Program on the U.S. Department of Energy (DOE) Oak Ridge Reservation in Oak Ridge, Tennessee for the DOE Headquarters Office of Biological and Environmental Research within the Office of Science.

  20. 基于Monte-Carlo辐射模型的水下光场绘制技术研究%Research on Render method of Underwater Light Fields Based on Monte Carlo Radiative Transfer Model

    Institute of Scientific and Technical Information of China (English)

    张森; 康凤举; 曾艳阳

    2012-01-01

    In the past few decades, people had studied many light render and shadow methods, but the conventional methods mostly aimed at generating realistic 3 dimensions animation in air, and seldom focused on the modeling of traditional underwater light field and dynamic smooth shadow. A computer model of automatically generated underwater light field and dynamic lighting effects was proposed. First, the physical properties of light transmission were introduced into ocean water. And then, according to the characteristics of Monte Carlo-given model, the light interference and diffuse reflection under the wind sea were researched, and 2 and 3 dimensions visualization model underwater light field were built. In addition, the real-time calculation of the shadow flow effect based on an improved global illumination and radiation model were given. The result shows the 3 dimensions underwater light field and dynamic shadow methods and corresponding game animation.%过去的几十年中人们提出许多处理光照及阴影的方法,但这些常规方法大都致力于生成空气介质中真实感的三维动画,而对传统的水下光场及光影的动态效果建模问题研究较少。给出一个水下光场及流动光影效果的计算机模型。该模型从海洋水体的光传输物理特性,然后根据该特性给出Monte-Carlo模型,通过研究风海波下光的干涉现象及漫射现象,建立水下光场的二三维可视化模型,基于改进的全局光照及辐射度模型实时计算出阴影的流动效果。此外,还给出了生成三维水下光场及动态光影的方法及相应的游戏动画图例。

  1. Pulsed electric field (PEF)research at USDA, ARS, ERRC

    Science.gov (United States)

    This article summarizes the effects of pulsed electric fields on the microbiological safety and quality aspects of various liquid food matrices, obtained at USDA, ARS, Eastern Regional Research Center under CRIS Project No. 1935-41420-013-00D, Processing Intervention Technologies for Enhancing the S...

  2. Enhancing Field Research Methods with Mobile Survey Technology

    Science.gov (United States)

    Glass, Michael R.

    2015-01-01

    This paper assesses the experience of undergraduate students using mobile devices and a commercial application, iSurvey, to conduct a neighborhood survey. Mobile devices offer benefits for enhancing student learning and engagement. This field exercise created the opportunity for classroom discussions on the practicalities of urban research, the…

  3. Enhancing Field Research Methods with Mobile Survey Technology

    Science.gov (United States)

    Glass, Michael R.

    2015-01-01

    This paper assesses the experience of undergraduate students using mobile devices and a commercial application, iSurvey, to conduct a neighborhood survey. Mobile devices offer benefits for enhancing student learning and engagement. This field exercise created the opportunity for classroom discussions on the practicalities of urban research, the…

  4. Field and laboratory methods in human milk research.

    Science.gov (United States)

    Miller, Elizabeth M; Aiello, Marco O; Fujita, Masako; Hinde, Katie; Milligan, Lauren; Quinn, E A

    2013-01-01

    Human milk is a complex and variable fluid of increasing interest to human biologists who study nutrition and health. The collection and analysis of human milk poses many practical and ethical challenges to field workers, who must balance both appropriate methodology with the needs of participating mothers and infants and logistical challenges to collection and analysis. In this review, we address various collection methods, volume measurements, and ethical considerations and make recommendations for field researchers. We also review frequently used methods for the analysis of fat, protein, sugars/lactose, and specific biomarkers in human milk. Finally, we address new technologies in human milk research, the MIRIS Human Milk Analyzer and dried milk spots, which will improve the ability of human biologists and anthropologists to study human milk in field settings.

  5. Conducting Science-Based Psychology Research in Schools

    Science.gov (United States)

    Dinella, Lisa M., Ed.

    2009-01-01

    What are the common pitfalls experienced by school researchers and how can they be avoided? Edited by Lisa M. Dinella of Monmouth University, "Conducting Science-Based Psychology Research in Schools" includes the collective knowledge of both established and emerging names in the field, providing an unparalleled resource for those interested in…

  6. ELECTRIC FIELD SENSORS BASED ON MEMS TECHNOLOGY

    Institute of Scientific and Technical Information of China (English)

    Gong Chao; Xia Shanhong; Deng Kai; Bai Qiang; Chen Shaofeng

    2005-01-01

    The design and optimization of two types of novel miniature vibrating Electric Field Sensors (EFSs) based on Micro Electro Mechanical Systems (MEMS) technology are presented.They have different structures and vibrating modes. The volume is much smaller than other types of charge-induced EFSs such as field-mills. As miniaturizing, the induced signal is reduced enormously and a high sensitive circuit is needed to detect it. Elaborately designed electrodes can increase the amplitude of the output current, making the detecting circuit simplified and improving the signal-to-noise ratio. Computer simulations for different structural parameters of the EFSs and vibrating methods have been carried out by Finite Element Method (FEM). It is proved that the new structures are realizable and the output signals are detectable.

  7. Hydraulic fracturing research in east Texas; Third GRI staged field experiment

    Energy Technology Data Exchange (ETDEWEB)

    Robinson, B.M. (S.A. Holditch and Associates, Inc. (US))

    1992-01-01

    This paper presents results from results from research conducted on the third Gas Research inst. (GRI) staged field experiment (SFE) well. Research well SFE No. 3 was drilled as part of a field-based research program conducted in east Texas during the past 7 years. Most of the work before SFE No. 3 involved the Travis Peak formation; however, the Cotton Valley sandstone was the primary research target for this well. SFE no. 3 is the last in a series of research wells planned for east Texas. A fourth SFE is being conducted in the Frontier formation of southwestern Wyoming. Data on SFE wells are collected from whole cores, openhole geophysical logs, in-situ stress measurements, production and pressure-transient tests, fracture stimulation treatments, fracture-diagnostic measurements, and postfracture performance tests. Test data then are analyzed by research scientists, geologists, and engineers to describe the reservoir and hydraulic fracture fully.

  8. An Automated Field Phenotyping Pipeline for Application in Grapevine Research

    Directory of Open Access Journals (Sweden)

    Anna Kicherer

    2015-02-01

    Full Text Available Due to its perennial nature and size, the acquisition of phenotypic data in grapevine research is almost exclusively restricted to the field and done by visual estimation. This kind of evaluation procedure is limited by time, cost and the subjectivity of records. As a consequence, objectivity, automation and more precision of phenotypic data evaluation are needed to increase the number of samples, manage grapevine repositories, enable genetic research of new phenotypic traits and, therefore, increase the efficiency in plant research. In the present study, an automated field phenotyping pipeline was setup and applied in a plot of genetic resources. The application of the PHENObot allows image acquisition from at least 250 individual grapevines per hour directly in the field without user interaction. Data management is handled by a database (IMAGEdata. The automatic image analysis tool BIVcolor (Berries in Vineyards-color permitted the collection of precise phenotypic data of two important fruit traits, berry size and color, within a large set of plants. The application of the PHENObot represents an automated tool for high-throughput sampling of image data in the field. The automated analysis of these images facilitates the generation of objective and precise phenotypic data on a larger scale.

  9. Laboratory and field based evaluation of chromatography ...

    Science.gov (United States)

    The Monitor for AeRosols and GAses in ambient air (MARGA) is an on-line ion-chromatography-based instrument designed for speciation of the inorganic gas and aerosol ammonium-nitrate-sulfate system. Previous work to characterize the performance of the MARGA has been primarily based on field comparison to other measurement methods to evaluate accuracy. While such studies are useful, the underlying reasons for disagreement among methods are not always clear. This study examines aspects of MARGA accuracy and precision specifically related to automated chromatography analysis. Using laboratory standards, analytical accuracy, precision, and method detection limits derived from the MARGA chromatography software are compared to an alternative software package (Chromeleon, Thermo Scientific Dionex). Field measurements are used to further evaluate instrument performance, including the MARGA’s use of an internal LiBr standard to control accuracy. Using gas/aerosol ratios and aerosol neutralization state as a case study, the impact of chromatography on measurement error is assessed. The new generation of on-line chromatography-based gas and particle measurement systems have many advantages, including simultaneous analysis of multiple pollutants. The Monitor for Aerosols and Gases in Ambient Air (MARGA) is such an instrument that is used in North America, Europe, and Asia for atmospheric process studies as well as routine monitoring. While the instrument has been evaluat

  10. At the Intersection Between Art and Research. Practice-Based Research in the Performing Arts

    DEFF Research Database (Denmark)

    of three years. The contributors to this anthology are artists and academics. They each present their particular angle to the field based partly on debates that arose in the study circle. What is the difference between theory and practice? Of what nature is the knowledge of the performing artist? Can......As an emerging field within the Nordic countries, the 'intersection' between art and research is still in the process of being named and renamed. Practice-Based Research within the Performing Arts was the concept that framed the investigation of the field in a NSU study circle during a period...... artistic work be original, political, ethical? How is the work disseminated? How can art as research have an impact on different art forms and on other types of research? What questions of identity does the researching artist face? Can his/her work be compared to a journey? The articles reflect a plurality...

  11. Personnel economics: A research field comes of age

    DEFF Research Database (Denmark)

    Koch, Alexander; Grund, Christian; Bryson, Alex

    2017-01-01

    to the Special Issue ‘Advances in personnel economics’ of the German Journal of Human Resource Management, we would like to illustrate the origins of the field, outline how personnel economics relates to other research areas, describe major developments in the field and address its future challenges.......The application of economic theory and principles to firms’ human resource problems is commonplace today. Personnel economics has come a long way since its early days in the late 1970s and 1980s, when scholars developed its theoretical foundations. In this contribution and introduction...

  12. Culture Studies in the Field of International Business Research

    DEFF Research Database (Denmark)

    Worm, Verner; Li, Xin; Jakobsen, Michael

    Purpose: The purpose of this paper is to describe the status of culture studies within the field of international business research, and to examine how two main paradigms – essentialism and social constructivism – relate to the discourse in this field. We analyze the main points of the two...... in this paper. Practical implications: We encourage practitioners to learn how to switch, both sequentially and spatially, between the two paradigms of culture (fundamentally incommensurable though they are). This involves taking a “both/or” approach to the two paradigms. Originality/Value: We show...

  13. Researches on the distribution law of vector sound field in elastic wedge bottom

    Institute of Scientific and Technical Information of China (English)

    ZHANG Haigang; PIAO Shengchun; YANG Shi'e; AN Xudong

    2011-01-01

    The method based on elastic parabolic equation method for calculating the sound vector field has been studied. The vector field in water and corresponding seismic wave field had been calculated for infra-sound in oceanic environment with elastic wedge bottom. The effects on sound field distribution for different frequency and depth of sound source had been researched, result shows that there is sound energy leakage into the bottom, the position where leakage occurred can be determined by the ratio of the ocean depth to the wavelength, as compared with normal mode theory.

  14. Problem-based, interdisciplinary field-based courses

    DEFF Research Database (Denmark)

    Hill, Trevor; Birch-Thomsen, Torben; Traynor, Catherine

    2008-01-01

    Student field courses at Universities are increasingly incorporating problem-based interdisciplinary approaches to enhance learning opportunities. This paper reports upon seven field-based, problem-oriented, interdisciplinary courses held within southern Africa concerning natural resource managem...... in a positive manner and a strong respectful working relationship from the staff. We advocate this process as worthwhile as classroom theory becomes real in all applied and complex environment....... management and sustainable land use. The SLUSE (Sustainable Land Use and Natural Resource Management) project, under which these courses were devised, is introduced and the process of field-course implementation is described. The SLUSE approach is discussed in terms of management issues, levels...... of responsibility, staff and student development and the benefits to rural host communities. The courses are very intense experiences and Students encounter difficulties working across traditional academic disciplines and in cross-cultural groups. Through critical thinking and self-reflection students understand...

  15. THE CURRENT STATE OF KNOWLEDGE IN THE VALUE RELEVANCE RESEARCH FIELD

    Directory of Open Access Journals (Sweden)

    Carmen- Alexandra BALTARIU

    2015-04-01

    Full Text Available The purpose of this paper is to assess the scientific literature referring to the value relevance of reported accounting information over a twelve year period starting from 2002. The approach of the paper is a theoretical (conceptual one. In order to complete the purpose of the paper we selected as research method the longitudinal qualitative analysis. The qualitative analysis carried out presents a deductive character. Our conclusions regarding the general characteristics of the research field pertaining to the value relevance of reported accounting information are drawn based on the main results and scientific contributions identified in the research field of interest.

  16. A Research Design for Studio-Based Research in Art

    Science.gov (United States)

    Marshall, Cora

    2010-01-01

    Studio-based research is rich with possibilities for contributing to the body of knowledge concerning creative processes, primarily because it has at its core the "making" disciplines. Nonetheless, for those who teach graduate research courses, this relative new mode of research can be challenging. In this article, the author discusses…

  17. A Research Design for Studio-Based Research in Art

    Science.gov (United States)

    Marshall, Cora

    2010-01-01

    Studio-based research is rich with possibilities for contributing to the body of knowledge concerning creative processes, primarily because it has at its core the "making" disciplines. Nonetheless, for those who teach graduate research courses, this relative new mode of research can be challenging. In this article, the author discusses the…

  18. A Research Design for Studio-Based Research in Art

    Science.gov (United States)

    Marshall, Cora

    2010-01-01

    Studio-based research is rich with possibilities for contributing to the body of knowledge concerning creative processes, primarily because it has at its core the "making" disciplines. Nonetheless, for those who teach graduate research courses, this relative new mode of research can be challenging. In this article, the author discusses…

  19. An Organizational Perspective to the Creation of the Research Field.

    Science.gov (United States)

    Talamo, Alessandra; Mellini, Barbara; Camilli, Marco; Ventura, Stefano; Di Lucchio, Loredana

    2016-09-01

    The aim of the paper is to contribute to the definition and analysis of the "access to the field" (Feldman et al. 2003) through an inter-organizational perspective. The paper discusses a case study on the access of a researcher to a hospital department where both organizations and actors are shown as actively constructing the research site. Both researcher and participants are described in terms of work organizations originally engaged in parallel systems of activity. Dynamics of negotiation "tied" the different actors' activities in a new activity system where researcher and participants concur to the effectiveness of both organizations (i.e., the research and the hospital ward). An Activity Theory perspective (Leont'ev 1978) is used with the aim of focusing the analysis on the activities in charge to the different actors. The approach adopted introduces the idea that, from the outset, research is made possible by a process of co-construction that works through the development of a completely new and shared work space arising around the encounter between researchers and participants. It is the balance between improvised actions and the co-creation of "boundary objects" (Star and Griesemer 1989), which makes interlacement possible between the two activity systems. The concept of "knotworking" (Engeström 2007a) is adopted to interpret specific actions by both organizations and actors intended to build a knot of activities whereby the new research system takes place.

  20. [Qualitative research into the scientific production in the field of bioethics].

    Science.gov (United States)

    Ribeiro, Carlos Dimas Martins; Maksud, Ivia; Claro, Lenita Barreto Lorena; Un, Julio Wong

    2014-07-01

    This article discusses the character and use of qualitative research methods in the field of bioethics. A systematic review of articles published in Latin American countries and selected from the SciELO database was conducted, with special emphasis on articles that employed qualitative research methodology. The set of articles reveals a field of bioethics composed of three distinct vectors. The first refers to the dual characterization of bioethics that can be defined as a social movement or as a discipline; the second differentiates bioethics from other fields of ethics, especially from predominantly deontology-based professional ethics; and the third is related to ethical approaches adopted in the analyses conducted in the research. A relatively insignificant part of these texts result from qualitative research and they can be divided into four categories according to their themes and guidelines: bioethics as a field and/or discourse; training in health; ethics, care, and clinical practice; formulation of health policy. The production shows, on the one hand, a relatively timid approach of social science researchers to the field of bioethics and, on the other hand, little use of qualitative methodologies in research in the field and, in some cases, a certain lack of precision regarding use of the methods.

  1. Field Sensing Characteristic Research of Carbon Fiber Smart Material

    Institute of Scientific and Technical Information of China (English)

    ZHANG Xiaoyu; Lü Yong; CHEN Jianzhong; LI Zhuoqiu

    2015-01-01

    In order to research the field sensing characteristic of the carbon fiber smart material, the Tikhonov regularization principle and the modiifed Newton-Raphson(MNR) algorithm were adopted to solve the inverse problem of the electrical resistance tomography (ERT). An ERT system of carbon fiber smart material was developed. Field sensing characteristic was researched with the experiment. The experimental results show that the speciifc resistance distribution of carbon ifber smart material is highly consistent with the distribution of structural strain. High resistance zone responds to high strain area, and the speciifc resistance distribution of carbon ifber smart material relfects the distribution of sample strain in covering area. Monitoring by carbon ifber smart material on complicated strain status in sample ifeld domain is realized through theoretical and experimental study.

  2. Open archives within the field of environmental research

    OpenAIRE

    Alrøe, Hugo Fjelsted

    2003-01-01

    Presentation on the concept of open archives within the field of environmental research (and related areas such as agriculture, forestry and veterinary medicine ...). The presentation concerns open archives in general but relates to thes issue of public acces in accordance with the theme in the seminar - the UNECE Convention on Access to Information, Public Participation in Decision-making and Access to Justice in Environmental Matters (Aarhus Convention) ). The Organic Eprints archive is ...

  3. Open archives within the field of environmental research

    OpenAIRE

    Alrøe, Hugo Fjelsted

    2003-01-01

    Presentation on the concept of open archives within the field of environmental research (and related areas such as agriculture, forestry and veterinary medicine ...). The presentation concerns open archives in general but relates to thes issue of public acces in accordance with the theme in the seminar - the UNECE Convention on Access to Information, Public Participation in Decision-making and Access to Justice in Environmental Matters (Aarhus Convention) ). The Organic Eprints archive is ...

  4. SATELLITE GRAVITY SURVEYING TECHNOLOGY AND RESEARCH OF EARTH'S GRAVITY FIELD

    Institute of Scientific and Technical Information of China (English)

    Ning Jinsheng

    2003-01-01

    This is a summarized paper. Two topics are discussed: Firstly, the concept, development and application of four kinds of satellite gravity surveying technology are introduced; Secondly, some problems of theory and method, which must be considered in the study of the Earth's gravity field based on satellite gravity data, are expounded.

  5. 300 Area Integrated Field-Scale Subsurface Research Challenge (IFRC) Field Site Management Plan

    Energy Technology Data Exchange (ETDEWEB)

    Freshley, Mark D.

    2008-12-31

    Pacific Northwest National Laboratory (PNNL) has established the 300 Area Integrated Field-Scale Subsurface Research Challenge (300 Area IFRC) on the Hanford Site in southeastern Washington State for the U.S. Department of Energy’s (DOE) Office of Biological and Environmental Research (BER) within the Office of Science. The project is funded by the Environmental Remediation Sciences Division (ERSD). The purpose of the project is to conduct research at the 300 IFRC to investigate multi-scale mass transfer processes associated with a subsurface uranium plume impacting both the vadose zone and groundwater. The management approach for the 300 Area IFRC requires that a Field Site Management Plan be developed. This is an update of the plan to reflect the installation of the well network and other changes.

  6. Evidence Based Dental Care: Integrating Clinical Expertise with Systematic Research

    OpenAIRE

    2014-01-01

    Clinical dentistry is becoming increasingly complex and our patients more knowledgeable. Evidence-based care is now regarded as the “gold standard” in health care delivery worldwide. The basis of evidence based dentistry is the published reports of research projects. They are, brought together and analyzed systematically in meta analysis, the source for evidence based decisions. Activities in the field of evidence-based dentistry has increased tremendously in the 21st century, more and more p...

  7. Field research on the spectral properties of crops and soils, volume 1. [Purdue Agronomy Farm

    Science.gov (United States)

    Bauer, M. E. (Principal Investigator); Biehl, L. L.; Robinson, B. F.

    1980-01-01

    The experiment design, data acquisition and preprocessing, data base management, analysis results and development of instrumentation for the AgRISTARS Supporting Research Project, Field Research task are described. Results of several investigations on the spectral reflectance of corn and soybean canopies as influenced by cultural practices, development stage and nitrogen nutrition are reported as well as results of analyses of the spectral properties of crop canopies as a function of canopy geometry, row orientation, sensor view angle and solar illumination angle are presented. The objectives, experiment designs and data acquired in 1980 for field research experiments are described. The development and performance characteristics of a prototype multiband radiometer, data logger, and aerial tower for field research are discussed.

  8. The neurosciences research program at MIT and the beginning of the modern field of neuroscience.

    Science.gov (United States)

    Adelman, George

    2010-01-15

    The interdisciplinary field, "neuroscience," began at MIT in 1962 with the founding of the Neurosciences Research Program (NRP) by Francis O. Schmitt and a group of US and international scientists - physical, biological, medical, and behavioral - interested in understanding the brain basis of behavior and mind. They organized and held specialist meetings of basic topics in neuroscience, and the journal and book publications over the next 20 years, based on these meetings, helped establish the new field.

  9. Outline of results of safety research (in nuclear fuel cycle field in fiscal year 1996)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-12-01

    The safety research in Power Reactor and Nuclear Fuel Development Corporation in fiscal year 1996 has been carried out based on the basic plan of safety research (from fiscal year 1996 to 2000) which was decided in March, 1996. In this report, on nuclear fuel cycle field, namely all the subjects in the fields of nuclear fuel facilities, environmental radioactivity and waste disposal, and the subjects related to nuclear fuel facilities among the fields of aseismatic and probabilistic safety assessments, the results of research in fiscal year 1996, the first year of the 5-year project, are summarized together with the outline of the basic plan of safety research. The basic policy, objective and system for promotion of the safety research are described. The objectives of the safety research are the advancement of safety technology, the safety of facilities, stable operation techniques, the safety design and the evaluation techniques of next generation facilities, and the support of transferring nuclear fuel cycle to private businesses. The objects of the research are uranium enrichment, fuel fabrication and reprocessing, and waste treatment and storage. 52 investigation papers of the results of the safety research in nuclear fuel cycle field in fiscal year 1996 are collected in this report. (K.I.)

  10. Research on intensity measurement in room impulse field

    Institute of Scientific and Technical Information of China (English)

    ZHAO Yueying; SHENG Shengwo; ZHAO Songling

    2008-01-01

    A new system of sound intensity measurement for impulse field in the room was proposed.This measurement system consists of a repeatable inspiriting sound source and a microphone fixed on a slowly rotating platform,which is equivalent to a circle microphone array composed of many perfectly matched microphones.The test principle was presented and typical application was described.Based upon this system the sound intensity measurement for impulse field in the room Was realized.Therefore,not only time but also spatial information of room impulse response can be obtained.

  11. 风险投资研究主流领域的因与果——基于管理学视角%Cause and Effect of the Mainstream Field of Venture Capital Research Based on the Management Perspective

    Institute of Scientific and Technical Information of China (English)

    喜济峰; 王莉; 郭立宏

    2012-01-01

    在简要阐述从管理学角度进行的风险投资研究发展的轨迹之后,用一个图式来说明风险投资流程的各种视角、各个分析层面、不同阶段和其中的参与角色等多维风险投资研究领域的扩展,并在此基础上来探究管理学视角下风险投资主流研究领域出现的前因后果.从主流研究对象来看,大多数研究关注机构化风险投资公司类型、投资者的视角以及风险投资周期中的筛选和/或监管阶段,而某些重要的研究领域被忽略了(比如对天使投资的研究).从主流研究理论或方法来看,代理理论已经成为对主流研究对象所采用的主导方法,但其严格的假设却让研究者过于脱离风险投资的实践.最后对主流研究领域面临的挑战进行了分析.%This paper briefly explained the development track of the venture capital research from management perspective , and illustrated the expand of multidimensional venture capital research from the angles such as various perspectives on investment process, various analysis levels, different stages and the participate roles in them. On this basis, the cause and effect of mainstream field of venture capital research were explored from management perspective. It is pointed from from the view of study object, most research focuses on the types of institutional investment company, the views of investor, and the screening and/or regulatory stage in investment cycle, which ignores some important research fields (such as angel investment research). From the view of research theory or methodology, agency theory has become the dominant method adopted, but its strict assumptions might be too far away from reality. In the end, the challenges which the mainstream field of venture capital research faces now are discussed from management perspective.

  12. Prakriti-based research: Good reporting practices.

    Science.gov (United States)

    Bhalerao, Supriya; Patwardhan, Kishor

    2016-03-01

    The recent advances in the fields of genomics, personalized medicine, and Ayurveda have motivated many researchers to look at the relationship between Prakriti (phenotype-based Ayurveda constitution) and various objective biological parameters. As a result, a number of studies reporting such a relationship have made their way into mainstream scholarly journals. However, when it comes to the protocols that these workers follow to identify one's Prakriti, there are several issues that are yet to be resolved. In this communication, we propose a few reporting practices that such workers are required to be encouraged to follow, while submitting their work on Prakriti to scholarly journals. We have arranged this proposal under the following domains that may serve as a preliminary checklist in this context: The textual references, validation process, assessment of characters, scoring pattern, weightage assignment, criterion for expressing the final Prakriti type, and a need to publish the complete Prakriti-determination tool. We advocate that only if the workers in the field adhere to these good reporting practices, one will be able to draw meaningful, generalizable, and applicable interpretations out of such studies. We also suggest that the editors of relevant scholarly journals may recommend these reporting practices while considering such reports for publication.

  13. Context-based assessment: creating opportunities for resonance between classroom fields and societal fields

    Science.gov (United States)

    Bellocchi, Alberto; King, Donna T.; Ritchie, Stephen M.

    2016-05-01

    There is on-going international interest in the relationships between assessment instruments, students' understanding of science concepts and context-based curriculum approaches. This study extends earlier research showing that students can develop connections between contexts and concepts - called fluid transitions - when studying context-based courses. We provide an in-depth investigation of one student's experiences with multiple contextual assessment instruments that were associated with a context-based course. We analyzed the student's responses to context-based assessment instruments to determine the extent to which contextual tests, reports of field investigations, and extended experimental investigations afforded her opportunities to make connections between contexts and concepts. A system of categorizing student responses was developed that can inform other educators when analyzing student responses to contextual assessment. We also refine the theoretical construct of fluid transitions that informed the study initially. Implications for curriculum and assessment design are provided in light of the findings.

  14. The Research of Field Expert Knowledge Base Based on Nonmonotony Reasoning%基于非单调推理的领域专家知识库的研究

    Institute of Scientific and Technical Information of China (English)

    夏幼明; 夏幼安; 徐天伟; 赵景秀

    2001-01-01

    At first,this paper introduces the last results of knowledge presenting and reasoning,basic conception and research methods of nonmonotony. Then,we enlarge ability to express knowledge in semantic network language,and put forward knowledge presenting way of modal logic. Finally,we provide arithmetic of modal logic reason.

  15. Deep Borehole Field Test Research Activities at LBNL

    Energy Technology Data Exchange (ETDEWEB)

    Dobson, Patrick [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Tsang, Chin-Fu [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Kneafsey, Timothy [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Borglin, Sharon [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Piceno, Yvette [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Andersen, Gary [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Nakagawa, Seiji [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Nihei, Kurt [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Rutqvist, Jonny [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Doughty, Christine [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Reagan, Matthew [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

    2016-08-19

    The goal of the U.S. Department of Energy Used Fuel Disposition’s (UFD) Deep Borehole Field Test is to drill two 5 km large-diameter boreholes: a characterization borehole with a bottom-hole diameter of 8.5 inches and a field test borehole with a bottom-hole diameter of 17 inches. These boreholes will be used to demonstrate the ability to drill such holes in crystalline rocks, effectively characterize the bedrock repository system using geophysical, geochemical, and hydrological techniques, and emplace and retrieve test waste packages. These studies will be used to test the deep borehole disposal concept, which requires a hydrologically isolated environment characterized by low permeability, stable fluid density, reducing fluid chemistry conditions, and an effective borehole seal. During FY16, Lawrence Berkeley National Laboratory scientists conducted a number of research studies to support the UFD Deep Borehole Field Test effort. This work included providing supporting data for the Los Alamos National Laboratory geologic framework model for the proposed deep borehole site, conducting an analog study using an extensive suite of geoscience data and samples from a deep (2.5 km) research borehole in Sweden, conducting laboratory experiments and coupled process modeling related to borehole seals, and developing a suite of potential techniques that could be applied to the characterization and monitoring of the deep borehole environment. The results of these studies are presented in this report.

  16. Research in the Field of Inclusive Education: Time for a Rethink?

    Science.gov (United States)

    Messiou, Kyriaki

    2017-01-01

    This paper sets out to challenge thinking and practice amongst researchers in the field of inclusive education. It does this based on an analysis of published articles in the "International Journal of Inclusive Education" between 2005 and 2015, which identified topics and methodologies used in studies of inclusive education. The analysis…

  17. Surveying the Field: The Research Model of Women in Librarianship, 1882-1898

    Science.gov (United States)

    McDowell, Kate

    2009-01-01

    Women who promoted library services to children in the United States in the late nineteenth century introduced the systematic use of survey research on library practice to the field of professional librarianship. They created a series of qualitative survey-based reports, the "Reading of the Young" reports, which were presented at ALA conferences…

  18. Marketing research of customer care in the field of women's underwear

    OpenAIRE

    Doubková, Klára

    2012-01-01

    The bachelor thesis inquires into the customer care in the field of women's underwear and focuses primarily on helpfulness and sale skills of the staff, the specialized knowledge of the staff and the assortment of offered goods. The marketing research was based on the mystery shopping method in seven selected retail stores selling underwear. Seven independent instructed model customers participated in the mystery shopping. The research clearly shows that the staff employed in the stores is pl...

  19. The Research of the Driver Attention Field Modeling

    Directory of Open Access Journals (Sweden)

    Pengfei Tao

    2014-01-01

    Full Text Available For expanding the application scope of car-following, based on the basic idea of the noncontact interaction of the objects in physics, establish an attention field model to describe the driving behavior. Firstly, propose the time distance concept to describe the degree of driver perception to the front one-dimensional space and extend its application range to the two-dimensional space. Secondly, connect the point which has the same time distance to constitute the equipotential line of drivers’ attention field equipotent, and establish a model to describe it. Thirdly, define the effective range of the driver’s psychological field with the feature of the driver’s visual distance range increasing and the angle decreasing. Finally, design the calculation method to collect projection of the object in the psychological field scope and calculate the curve points to determine the object’s intensity of psychological field. Preliminarily build the driving behavior model and use the numerical simulation method to simulate the simple transport scenarios; initially verify the validity of the model.

  20. Technical aspects of exposure to magnetic fields of extremely low frequencies (ELF in biomedical research

    Directory of Open Access Journals (Sweden)

    Paweł Bieńkowski

    2015-06-01

    Full Text Available Background: Experiments on the electromagnetic field influence on organisms are an important part of biophysical studies. It is an interdisciplinary research spanning biology and medicine with the engineering in generation and measurement of electromagnetic fields. The aim of the study consists in the analysis of parameters estimations and measurements of extremely low frequency magnetic field (ELF MF as well as exposure systems parameters in biomedical research. Material and Methods: Experiments were performed on 2 most popular low magnetic field exposure systems: the solenoid and Helmholtz coils. A theoretical analysis and a measurement verification of the magnetic field distribution inside the systems were carried out to evaluate the homogeneity of the magnetic field. Additional factors, vibrations and temperature changes, affecting the assessment of the biological effects of magnetic field exposure were also examined. Results: Based on the study results, a comparative analysis of solenoids and Helmholtz coils as the magnetic field exposure systems was presented. Proposals for the description of magnetic field exposure were also formulated. Conclusions: The authors emphasize the importance of a conscious choice of exposure conditions and their explicit description. These are fundamental requirements for both the reproduction of experimental conditions and the verification of results. Med. Pr. 2015;66(2:185–197

  1. Culture Studies in the Field of International Business Research

    DEFF Research Database (Denmark)

    Worm, Verner; Li, Xin; Jakobsen, Michael

    Purpose: The purpose of this paper is to describe the status of culture studies within the field of international business research, and to examine how two main paradigms – essentialism and social constructivism – relate to the discourse in this field. We analyze the main points of the two...... paradigms, and discuss how the relationship between them has evolved. Findings: We show that essentialism and social constructivism have a paradoxical relationship. They seem to be mutually exclusive, yet each offers unique insights into the notion of culture. Both are necessary for a complete understanding...... for the first time that Bohr’s complementarity principle is illustrative and useful for understanding the paradoxical relationship between essentialism and social constructivism. Inspired by two principles enunciated by Bohr – that of complementarity and that of classical concepts – we argue that the two...

  2. Flipped Classroom Research and Trends from Different Fields of Study

    Science.gov (United States)

    Zainuddin, Zamzami; Halili, Siti Hajar

    2016-01-01

    This paper aims to analyse the trends and contents of flipped classroom research based on 20 articles that report on flipped learning classroom initiatives from 2013-2015. The content analysis was used as a methodology to investigate methodologies, area of studies, technology tools or online platforms, the most frequently used keywords and works…

  3. About soil cover heterogeneity of agricultural research stations' experimental fields

    Science.gov (United States)

    Rannik, Kaire; Kõlli, Raimo; Kukk, Liia

    2013-04-01

    Depending on local pedo-ecological conditions (topography, (geo) diversity of soil parent material, meteorological conditions) the patterns of soil cover and plant cover determined by soils are very diverse. Formed in the course of soil-plant mutual relationship, the natural ecosystems are always influenced to certain extent by the other local soil forming conditions or they are site specific. The agricultural land use or the formation of agro-ecosystems depends foremost on the suitability of soils for the cultivation of feed and food crops. As a rule, the most fertile or the best soils of the area, which do not present any or present as little as possible constraints for agricultural land use, are selected for this purpose. Compared with conventional field soils, the requirements for the experimental fields' soil cover quality are much higher. Experimental area soils and soil cover composition should correspond to local pedo-ecological conditions and, in addition to that, represent the soil types dominating in the region, whereas the fields should be as homogeneous as possible. The soil cover heterogeneity of seven arable land blocks of three research stations (Jõgeva, Kuusiku and Olustvere) was studied 1) by examining the large scale (1:10 000) digital soil map (available via the internet), and 2) by field researches using the transect method. The stages of soils litho-genetic and moisture heterogeneities were estimated by using the Estonian normal soils matrix, however, the heterogeneity of top- and subsoil texture by using the soil texture matrix. The quality and variability of experimental fields' soils humus status, was studied more thoroughly from the aspect of humus concentration (g kg-1), humus cover thickness (cm) and humus stocks (Mg ha-1). The soil cover of Jõgeva experimental area, which presents an accumulative drumlin landscape (formed during the last glacial period), consist from loamy Luvisols and associated to this Cambisols. In Kuusiku area

  4. Brain-Based Research & Language Teaching.

    Science.gov (United States)

    Christison, MaryAnn

    2002-01-01

    Introduces brain-based teaching and learning. Reviews basic biological facts about the human brain and discusses seven principles based on recent research that have practical benefits for English-as-a-Foreign-Language teachers. (Author/VWL)

  5. DC-based magnetic field controller

    Energy Technology Data Exchange (ETDEWEB)

    Kotter, Dale K. (Shelley, ID); Rankin, Richard A. (Ammon, ID); Morgan, John P,. (Idaho Falls, ID)

    1994-01-01

    A magnetic field controller for laboratory devices and in particular to dc operated magnetic field controllers for mass spectrometers, comprising a dc power supply in combination with improvements to a hall probe subsystem, display subsystem, preamplifier, field control subsystem, and an output stage.

  6. DC-based magnetic field controller

    Energy Technology Data Exchange (ETDEWEB)

    Kotter, D.K.; Rankin, R.A.; Morgan, J.P.

    1994-05-31

    A magnetic field controller is described for laboratory devices and in particular to dc operated magnetic field controllers for mass spectrometers, comprising a dc power supply in combination with improvements to a Hall probe subsystem, display subsystem, preamplifier, field control subsystem, and an output stage. 1 fig.

  7. Participatory Action Research in the Field of Neonatal Intensive Care

    DEFF Research Database (Denmark)

    Nørgaard, Betty; Johannessen, Helle; Fenger-Grøn, Jesper

    2016-01-01

    BACKGROUND: In neonatal intensive care units (NICUs) health care professionals typically give most of their attention to the infants and the mothers while many fathers feel uncertain and have an unmet need for support and guidance. This paper describes and discusses participatory action research...... of the father friendly NICU. CONCLUSIONS: This paper contributed new knowledge of how PAR can be used to ensure that participants engaged in the field are involved in the entire process; consequently, this will ensure that the changes are feasible and sustainable....

  8. Inverse field-based approach for simultaneous B₁ mapping at high fields - a phantom based study.

    Science.gov (United States)

    Jin, Jin; Liu, Feng; Zuo, Zhentao; Xue, Rong; Li, Mingyan; Li, Yu; Weber, Ewald; Crozier, Stuart

    2012-04-01

    Based on computational electromagnetics and multi-level optimization, an inverse approach of attaining accurate mapping of both transmit and receive sensitivity of radiofrequency coils is presented. This paper extends our previous study of inverse methods of receptivity mapping at low fields, to allow accurate mapping of RF magnetic fields (B(1)) for high-field applications. Accurate receive sensitivity mapping is essential to image domain parallel imaging methods, such as sensitivity encoding (SENSE), to reconstruct high quality images. Accurate transmit sensitivity mapping will facilitate RF-shimming and parallel transmission techniques that directly address the RF inhomogeneity issue, arguably the most challenging issue of high-field magnetic resonance imaging (MRI). The inverse field-based approach proposed herein is based on computational electromagnetics and iterative optimization. It fits an experimental image to the numerically calculated signal intensity by iteratively optimizing the coil-subject geometry to better resemble the experiments. Accurate transmit and receive sensitivities are derived as intermediate results of the optimization process. The method is validated by imaging studies using homogeneous saline phantom at 7T. A simulation study at 300MHz demonstrates that the proposed method is able to obtain receptivity mapping with errors an order of magnitude less than that of the conventional method. The more accurate receptivity mapping and simultaneously obtained transmit sensitivity mapping could enable artefact-reduced and intensity-corrected image reconstructions. It is hoped that by providing an approach to the accurate mapping of both transmit and receive sensitivity, the proposed method will facilitate a range of applications in high-field MRI and parallel imaging. Copyright © 2012 Elsevier Inc. All rights reserved.

  9. Research on Task-Based Language Teaching

    Institute of Scientific and Technical Information of China (English)

    赵玲玲

    2014-01-01

    This paper begins with a brief introduction to Task-Based Language Teaching(TBLT).The Task-Based Language Teaching(TBLA) has gained popularity in the field of language teaching since the last decade of the 20th century.This paper mainly il ustrates the definition,importance and approaches of Task-Based Language Teaching(TBLA).

  10. Factor Structure of the TOEFL® Internet-Based Test (iBT): Exploration in a Field Trial Sample. TOEFL iBT Research Report. TOEFL iBT-04. ETS RR-08-09

    Science.gov (United States)

    Sawaki, Yasuyo; Stricker, Lawrence; Oranje, Andreas

    2008-01-01

    The present study investigated the factor structure of a field trial sample of the Test of English as a Foreign Language™ Internet-based test (TOEFL® iBT). An item-level confirmatory factor analysis (CFA) was conducted for a polychoric correlation matrix of items on a test form completed by 2,720 participants in the 2003-2004 TOEFL iBT Field…

  11. Enhance Your Team-Based Qualitative Research

    OpenAIRE

    Fernald, Douglas H.; Duclos, Christine W.

    2005-01-01

    PURPOSE Qualitative research projects often involve the collaborative efforts of a research team. Challenges inherent in teamwork include changes in membership and differences in analytical style, philosophy, training, experience, and skill. This article discusses teamwork issues and tools and techniques used to improve team-based qualitative research.

  12. Electromagnetic fields from mobile phone base station - variability analysis.

    Science.gov (United States)

    Bienkowski, Pawel; Zubrzak, Bartlomiej

    2015-09-01

    The article describes the character of electromagnetic field (EMF) in mobile phone base station (BS) surroundings and its variability in time with an emphasis on the measurement difficulties related to its pulse and multi-frequency nature. Work also presents long-term monitoring measurements performed recently in different locations in Poland - small city with dispersed building development and in major polish city - dense urban area. Authors tried to determine the trends in changing of EMF spectrum analyzing daily changes of measured EMF levels in those locations. Research was performed using selective electromagnetic meters and also EMF meter with spectrum analysis.

  13. 基于Shapley值的川东北地区天然气协同开发模型研究%The Research of Synergetic Exploitation Model Based on Shapley in Chuangdongbei Natural Gas Field

    Institute of Scientific and Technical Information of China (English)

    田江; 秦霞; 肖爽

    2012-01-01

    围绕达州天然气开发的实际,从协同发展的角度出发,通过分析川东北地区天然气开发的现状及挑战,应用供应链管理、协同管理的理论和方法研究天然气协同开发的Shapley模型,有效地解决了天然气开发中政府、企业及供应链上下游之间的协调机制,以实现协同和参与各方共赢的目标.在理论方面,研究了产业内外的协同机制和实施策略;在实践方面,为达州的产业规划和社会经济发展提供指导和参考,对于川东北地区的天然气产业规划、工业布局以及达州地区的社会、经济、文化和环境的协调发展提出有效的措施,从而实现以天然气产业为龙头,促进地区经济的全面又快又好发展.%This paper focuses on the actual demands in the exploitation of Chuangdongbei natural gas field, following the analysis of the actualities and challenges encountered, applying supply chain management and synergetic theory and methods to study the exploitation based on Shapley model. This mode can effectively resolve the conflicts between the government, enterprises and the participator involving in the natural gas supply chain by the coordinated mechanism to realize the mutual-benefit goals. In the theory aspect, this paper studies the coordinated mechanisms and implementary tactics and expands the coordination in industries. In the practice aspect, this research provides conducts and consultation in the industry planning and social and economic development in Dazhou City, it further promotes the coordinated development among society, economy, culture and environment, and finally realizes the continuous development in the regional economy with pillar industry of natural gas.

  14. Field Emission From Ordered Nano-array Structures Based on Porous Aluminum Oxide Templates

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    @@ This thesis reports my research work of fabricating nanostructures by using nanoporous anodic aluminum oxide (AAO) templates and their field emission properties in the past few years. Some important results obtained are as follows: 1. We first proposed a new concept of fabricating field emitters with ordered nanostructures based on porous aluminum oxide templates such as AAO/Al, metal/AAO, PANI/AAO, CNTs/AAO, Si/AAO and did a lot of research in this field.

  15. Practical methods for generating alternating magnetic fields for biomedical research

    Science.gov (United States)

    Christiansen, Michael G.; Howe, Christina M.; Bono, David C.; Perreault, David J.; Anikeeva, Polina

    2017-08-01

    Alternating magnetic fields (AMFs) cause magnetic nanoparticles (MNPs) to dissipate heat while leaving surrounding tissue unharmed, a mechanism that serves as the basis for a variety of emerging biomedical technologies. Unfortunately, the challenges and costs of developing experimental setups commonly used to produce AMFs with suitable field amplitudes and frequencies present a barrier to researchers. This paper first presents a simple, cost-effective, and robust alternative for small AMF working volumes that uses soft ferromagnetic cores to focus the flux into a gap. As the experimental length scale increases to accommodate animal models (working volumes of 100s of cm3 or greater), poor thermal conductivity and volumetrically scaled core losses render that strategy ineffective. Comparatively feasible strategies for these larger volumes instead use low loss resonant tank circuits to generate circulating currents of 1 kA or greater in order to produce the comparable field amplitudes. These principles can be extended to the problem of identifying practical routes for scaling AMF setups to humans, an infrequently acknowledged challenge that influences the extent to which many applications of MNPs may ever become clinically relevant.

  16. Annual Report for 2003 Wild Horse Research and Field Activities

    Science.gov (United States)

    Ransom, Jason; Singer, Francis J.; Zeigenfuss, Linda C.

    2004-01-01

    As stated in the Wild Horse Fertility Control Field Trial Plan, the Bureau of Land Management (BLM) has an immediate need for a safe, effective contraceptive agent to assist in the management of the large number of wild horses on western rangelands. The BLM and the U.S. Geological Survey-Biological Resources Discipline (USGS/BRD) are testing the immunocontraceptive agent Porcine Zonae Pellucida (PZP) in field trials with three free-roaming herds of western wild horses. Extensive research has already been conducted on the safety, efficacy, and duration of PZP applications in both domestic and feral horses on eastern barrier islands and in some select trials I with wild horses in Nevada managed by the BLM. However, significant questions remain concerning the effects of I PZP application at the population level in the wild, as well as effects at the individual level on behavior, social structure, and harem dynamics of free-ranging animals. These questions are best answered with field trials on wild horse herds under a tight research protocol. The ultimate goal is to provide the BLM with the protocols and information necessary to begin using fertility control to regulate population growth rates in wild horse herds on a broader scale. Fertility control is intended to assist the conventional capture, removal, and adoption process as a I means of controlling excess numbers of wild horses and burros, and to greatly reduce the adoption costs and numbers of animals handled. Fertility control is not intended to totally replace the removal and adoption process.

  17. Explosive Field Visualization Based on Image Fusion

    Institute of Scientific and Technical Information of China (English)

    ZHANG Wen-yao; JIANG Ling-shuang

    2009-01-01

    m the composite sequence. Experimental results show that the new images integrate the advantages of sources, effectively improve the visualization, and disclose more information about explosive field.

  18. Quality Assurance Plan for Field Activities at the Natural and Accelerated Bioremediation Research (NABIR) Field Research Center (FRC), Oak Ridge, Tennessee

    Energy Technology Data Exchange (ETDEWEB)

    Brandt, C.C.

    2002-02-28

    The Environmental Sciences Division (ESD) at Oak Ridge National Laboratory (ORNL) has established a Natural and Accelerated Bioremediation Research (NABIR) program Field Research Center (FRC) for the U.S. Department of Energy (DOE) Office of Biological and Environmental Research. The FRC is located in Bear Creek Valley within the Y-12 Plant area of responsibility on DOE's Oak Ridge Reservation in Tennessee. The NABIR program is a long-term effort designed to increase the understanding of fundamental biogeochemical processes that would allow the use of bioremediation approaches for cleaning up DOE's contaminated legacy waste sites. The FRC provides a site for investigators in the NABIR program to conduct research and obtain samples related to in situ bioremediation. The FRC is integrated with existing and future laboratory and field research and provides a means of examining the biogeochemical processes that influence bioremediation under controlled small-scale field conditions. This Quality Assurance Plan (QAP) documents the quality assurance protocols for field and laboratory activities performed by the FRC staff. It supplements the requirements in the ORNL Nuclear Quality Assurance Program and the ESD Quality Assurance Program. The QAP addresses the requirements in Title 10 CFR, Part 830 Subpart A, ''Quality Assurance Requirements'', using a graded approach appropriate for Research and Development projects based on guidance from ''Implementation Guide for Quality Assurance Programs for Basic and Applied Research'' (DOE-ER-STD-6001-92). It also supports the NABIR FRC Management Plan (Watson and Quarles 2000a) which outlines the overall procedures, roles and responsibilities for conducting research at the FRC. The QAP summarizes the organization, work activities, and qualify assurance and quality control protocols that will be used to generate scientifically defensible data at the FRC. The QAP pertains to field

  19. Quality Assurance Plan for Field Activities at the Natural and Accelerated Bioremediation Research (NABIR) Field Research Center (FRC), Oak Ridge, Tennessee

    Energy Technology Data Exchange (ETDEWEB)

    Brandt, C.C.

    2002-02-28

    The Environmental Sciences Division (ESD) at Oak Ridge National Laboratory (ORNL) has established a Natural and Accelerated Bioremediation Research (NABIR) program Field Research Center (FRC) for the U.S. Department of Energy (DOE) Office of Biological and Environmental Research. The FRC is located in Bear Creek Valley within the Y-12 Plant area of responsibility on DOE's Oak Ridge Reservation in Tennessee. The NABIR program is a long-term effort designed to increase the understanding of fundamental biogeochemical processes that would allow the use of bioremediation approaches for cleaning up DOE's contaminated legacy waste sites. The FRC provides a site for investigators in the NABIR program to conduct research and obtain samples related to in situ bioremediation. The FRC is integrated with existing and future laboratory and field research and provides a means of examining the biogeochemical processes that influence bioremediation under controlled small-scale field conditions. This Quality Assurance Plan (QAP) documents the quality assurance protocols for field and laboratory activities performed by the FRC staff. It supplements the requirements in the ORNL Nuclear Quality Assurance Program and the ESD Quality Assurance Program. The QAP addresses the requirements in Title 10 CFR, Part 830 Subpart A, ''Quality Assurance Requirements'', using a graded approach appropriate for Research and Development projects based on guidance from ''Implementation Guide for Quality Assurance Programs for Basic and Applied Research'' (DOE-ER-STD-6001-92). It also supports the NABIR FRC Management Plan (Watson and Quarles 2000a) which outlines the overall procedures, roles and responsibilities for conducting research at the FRC. The QAP summarizes the organization, work activities, and qualify assurance and quality control protocols that will be used to generate scientifically defensible data at the FRC. The QAP pertains to field

  20. Control volume based hydrocephalus research

    Science.gov (United States)

    Cohen, Benjamin; Voorhees, Abram; Wei, Timothy

    2008-11-01

    Hydrocephalus is a disease involving excess amounts of cerebral spinal fluid (CSF) in the brain. Recent research has shown correlations to pulsatility of blood flow through the brain. However, the problem to date has presented as too complex for much more than statistical analysis and understanding. This talk will highlight progress on developing a fundamental control volume approach to studying hydrocephalus. The specific goals are to select physiologically control volume(s), develop conservation equations along with the experimental capabilities to accurately quantify terms in those equations. To this end, an in vitro phantom is used as a simplified model of the human brain. The phantom's design consists of a rigid container filled with a compressible gel. The gel has a hollow spherical cavity representing a ventricle and a cylindrical passage representing the aquaducts. A computer controlled piston pump supplies pulsatile volume fluctuations into and out of the flow phantom. MRI is used to measure fluid velocity, and volume change as functions of time. Independent pressure measurements and flow rate measurements are used to calibrate the MRI data. These data are used as a framework for future work with live patients.

  1. Reevaluation of ethnologic field research of the Dogon

    Directory of Open Access Journals (Sweden)

    Kovač Senka

    2010-01-01

    Full Text Available One of the events that marked the last decade of the 20th century was a more intensive re-evaluation of the work of Marcel Griaule (1898-1956, who was the first French ethnologist to conduct planned field research among the Dogon of Western Africa, in the period between 1931 and 1956. Griaule’s work had previously been re-examined in the sixties, in France (Georges Balandier, Great Britain (Mary Douglas and in other places. British social anthropologists had put forward a critique of Griaule’s field methods, concentrating on his use of translators and work with privileged informants. Van Beek’ repeated study from 1991 started the new wave of polemic that came to include Griaule’s old critics, associates and relatives. Some of the participants in this debate interpreted Van Beek’s “attack” on Griaule as - inspired by Freeman’s critique of Mead, and the general trend of reevaluations - of anthropology’s leading figures at the close of the 20th century. The objective of Van Beek’s repeated study was to evaluate the reliability of Griaule’s findings. Van Beek emphasized three groups of errors in Griaule’s research: 1 the scarcity of data; 2 the unverifiability of data; 3 the inappropriateness of analyses. Van Beeks’ repeated study did not reach the level of controversy that followed the Mead-Freeman polemic in the eighties. On the other hand, it puit forward an important question on whether French anthropology can face selfcriticism, and established Dutch academic presence in Western Africa The French advocates of “New Dogon anthropology” focus their research on time “before Ogotemmêli” and “after Ambara”. Another important improvement represents the inclusion of local Dogon scholars.

  2. a Survey on Topics, Researchers and Cultures in the Field of Digital Heritage

    Science.gov (United States)

    Münster, S.

    2017-08-01

    Digital heritage comprises a broad variety of approaches and topics and involves researchers from multiple disciplines. While the use of digital methods in the text-oriented disciplines dealing with cultural heritage is widely discussed and canonized, an up-to-date investigation on cultural heritage as a scholarly field is currently missing. The extended abstract is about a three-stage investigation on standards, publications, disciplinary cultures as well as scholars in the field of digital heritage, carried out in 2016 and 2017. It includes results of a workshop-based survey involving 44 researchers, 15 qualitative interviews as well as an online survey with nearly 1000 participants. As an overall finding, a community is driven by researchers from European countries and especially Italy with a background in humanities, dealing with topics of data acquisition, data management and visualization. Moreover, conference series are most relevant for a scientific discourse, and especially EU projects set pace as most important research endeavours.

  3. Immersion in a Hudson Valley Tidal Marsh and Climate Research Community - Lamont-Doherty's Secondary School Field Research Program

    Science.gov (United States)

    Peteet, D. M.; Newton, R.; Vincent, S.; Sambrotto, R.; Bostick, B. C.; Schlosser, P.; Corbett, J. E.

    2015-12-01

    A primary advantage of place-based research is the multidisciplinary and interdisciplinary research that can be applied to a single locale, with a depth of continued study through time. Through the last decade, Lamont-Doherty's Secondary School Field Research Program (SSFRP) has promoted scientific inquiry, mostly among groups under-represented in STEM fields, in Piermont Marsh, a federally protected marsh in the Hudson estuary. At the same time, Lamont Doherty Earth Observatory (LDEO) scientists have become more involved, through mentoring by researchers, postdocs and graduate students, often paired with high school teachers. The sustained engagement of high school students in a natural environment, experiencing the Hudson River and its tidal cycles, protection of coastline, water quality improvement, native and invasive plant communities, is fundamental to their understanding of the importance of wetlands with their many ecosystem services. In addition, the Program has come to see "place" as inclusive of the Observatory itself. The students' work at Lamont expands their understanding of educational opportunities and career possibilities. Immersing students in a research atmosphere brings a level of serious inquiry and study to their lives and provides them with concrete contributions that they make to team efforts. Students select existing projects ranging from water quality to Phragmites removal, read papers weekly, take field measurements, produce lab results, and present their research at the end of six weeks. Ongoing results build from year to year in studies of fish populations, nutrients, and carbon sequestration, and the students have presented at professional scientific meetings. Through the Program students gain a sense of ownership over both their natural and the academic environments. Challenges include sustained funding of the program; segmenting the research for reproducible, robust results; fitting the projects to PIs' research goals, time

  4. Reflections on Design-Based Research

    DEFF Research Database (Denmark)

    Ørngreen, Rikke

    Design-Based Research is an intervention method that researches educational design (products or processes) in real-life settings with the dual purpose of generating theories about the domain and develop the design iteratively. This paper is an integrative review with a personal ethnographic...... narrative that draws on Design-Based Research literature, and identifies and discusses elements from Interaction Design and Action Research that the Design-Based Research approach could apply, situating the research in online educational projects, where participants are distributed in time and space......, and where the learning process expands to everyday work and life practices, as in competence development projects. The elements discussed are: to broaden the concept of users, to include the various roles in the organization; to be explorative and work with potentials, suggestions and alternative designs...

  5. Reflections by a student and a faculty member on student-faculty collaborative geophysical field research

    Science.gov (United States)

    Bank, C.; Rotzien, J.

    2007-12-01

    More and more students and faculty engage in collaborative research. Field geophysics provides a fascinating venue, as it always contributes to interpersonal relations, usually involves off-campus work, and often allows us to meet new people and explore a different culture. Tackling an authentic research problem keeps a faculty member excited about her/his discipline, while allowing a student to engage in the process of science, follow a researcher's thoughts and contribute to a real project. The exchange of ideas and the generation of new knowledge is rewarding to the student as it facilitates her/his academic growth. Despite the obvious advantages of including students in field-based research, few students are allowed such an opportunity because of the institutional commitment in time and money that is necessary for success. Other challenges in field-based geophysical research include steep learning curves related to the use of equipment, unknown outcomes (data that is often difficult to interpret), and a true commitment to the project on the student's part. The faculty member on the other hand faces additional challenges because of the responsibility for students in the field, scheduling constraints, limited funding, and students' diverse academic goals. This presentation will be given by a faculty member and a student who have engaged in various authentic research projects. Projects ranged from afternoon lab exercises on campus (eg, microgravity survey over a tunnel on campus), course projects connected to field trips (eg, magnetic study and subsequent potential field analysis), summer research projects (eg, georadar survey of Deboullie Lake rock glacier), to year-long undergraduate thesis projects (eg, potential field studies at igneous centres of the Navajo Volcanic Field). We will present highlights of these projects, examine their pedagogical merits, and discuss the advantages and rewards we earned as well as the challenges we faced. Despite all challenges

  6. 基于无限元方法的壳体外声场仿真研究%Research on outside sound field simulation of shell based on FEM

    Institute of Scientific and Technical Information of China (English)

    李智劳; 闫云聚; 屈康康; 宁晓周

    2011-01-01

    An acoustic model of infinite element coupling with finite element is established in this paper.By applying the infinite element coupling with finite element of SYSNOISE,we study the outside sound field of radiation of the one-eighth closed spherical shell when the medium is water and air.Shell is one of the most widely used structures in engineering. Meanwhile the sound field problem of shell is being paid more and more attention. Strong sound field may cause the distortion,even destroys the structures, and makes the structures lose working ability.By calculating the outside sound field radiation of one -eighth spherical shell in a typical excitation, we obtain the basic distribution of outside sound level under lOOHz and sound pressure level curve of the field point when the fluid is water and air respectively.ln addition the basic changing rule of the outside sound field of shell with the change of excitation is obtained,which will provide important reference for further research on acoustic radiation and theoretical foundation for solving the engineering problems in the future.%建立了无限元与有限元声学耦合模型,运用SYSNOISE软件的无限元与有限元耦合技术对八分之一封闭球壳的外部辐射声场进行研究,计算了八分之一球壳在介质为水和空气时,在典型激励作用下的外部声场辐射情况.壳体是工程中应用最广泛的结构之一,同时壳体的声场问题也越来越受到关注,强声场可能会导致结构发生变形,甚至破坏,使结构失去工作能力.通过计算,得出了壳体在100Hz时的声压级分布图,给出了壳体外部为水和空气时的声压级曲线,得出了壳体外部声场随激励变化的基本规律.这种方法为研究声场辐射问题提供了重要参考,也为今后解决此类工程问题提供了理论上的依据.

  7. Classification Situations : A New Field of Research for Valuation Studies?

    Directory of Open Access Journals (Sweden)

    Julian Jürgenmeyer

    2016-12-01

    Full Text Available This conference note adds to recent discussions about the sociological implications of the spread of digital techniques for classifying market actors, specifically with regard to processes of social stratification. We first present some of the contributions to the conference "Classification Situations in Markets" and then discuss their implications for future research in general and the field of valuation studies in particular. We suggest three themes related to the conference that deserve further attention by students of valuation and related social processes: (a the challenges posed by the rise of big data and algorithmic classifications to the study of classification and valuation; (b the feedback loops of valuation regimes, in particular their consequences for conceptions of the self; and (c the relation between classification situations and larger institutional settings, which implies a more explicitly comparative orientation.

  8. Research of microwave scattering properties of snow fields

    Science.gov (United States)

    Angelakos, D. J.

    1978-01-01

    The results obtained in the research program of microwave scattering properties of snow fields are presented. Experimental results are presented showing backscatter dependence on frequency (5.8-8.0 GHz), angle of incidence (0-60 degrees), snow wetness (time of day), and frequency modulation (0-500 MHz). Theoretical studies are being made of the inverse scattering problem yielding some preliminary results concerning the determination of the dielectric constant of the snow layer. The experimental results lead to the following conclusions: snow layering affects backscatter, layer response is significant up to 45 degrees of incidence, wetness modifies snow layer effects, frequency modulation masks the layer response, and for the proper choice of probing frequency and for nominal snow depths, it appears to be possible to measure the effective dielectric constant and the corresponding water content of a snow pack.

  9. Indoor field strength prediction based on FMM

    Institute of Scientific and Technical Information of China (English)

    WANG Zheng-bin; ZHANG Ye-rong

    2006-01-01

    In this article, the fast multipole method (FMM) is applied to analyze the field strength of an ultra-wideband (UWB)signal. Small coverage of UWB communication systems and high efficiency of the algorithm make it possible to calculate the amplitude of electric field accurately. A homogeneous dielectric body and a multilayered dielectric object are studied. The computational results obtained by applying the FMM agree well with those obtained by applying the method of moments (MoM).

  10. FINESSE Spaceward Bound - Teacher Engagement in NASA Science and Exploration Field Research

    Science.gov (United States)

    Jones, A. J. P.; Heldmann, J. L.; Sheely, T.; Karlin, J.; Johnson, S.; Rosemore, A.; Hughes, S.; Nawotniak, S. Kobs; Lim, D. S. S.; Garry, W. B.

    2016-01-01

    The FINESSE (Field Investigations to Enable Solar System Science and Exploration) team of NASA's Solar System Exploration Research Virtual Institute (SSERVI) is focused on a science and exploration field-based research program aimed at generating strategic knowledge in preparation for the human and robotic exploration of the Moon, Near Earth Asteroids, and the moons of Mars. The FINESSE science program is infused with leading edge exploration concepts since "science enables exploration and exploration enables science." The FINESSE education and public outreach program leverages the team's field investigations and educational partnerships to share the excitement of lunar, Near Earth Asteroid, and martian moon science and exploration locally, nationally, and internationally. The FINESSE education plan is in line with all of NASA's Science Mission Directorate science education objectives, particularly to enable STEM (science, technology, engineering, and mathematics) education and leverage efforts through partnerships.

  11. Teachers' Classroom-Based Action Research

    Science.gov (United States)

    Cain, Tim

    2011-01-01

    Teachers' classroom-based action research is sometimes misunderstood by those who undertake it and support it, in three respects. First, it is wrongly assumed to fall into either positivist or interpretive paradigms (or perhaps a mixture of both) or to be critical. Second, there is little understanding as to why action research is necessarily…

  12. Teachers' Classroom-Based Action Research

    Science.gov (United States)

    Cain, Tim

    2011-01-01

    Teachers' classroom-based action research is sometimes misunderstood by those who undertake it and support it, in three respects. First, it is wrongly assumed to fall into either positivist or interpretive paradigms (or perhaps a mixture of both) or to be critical. Second, there is little understanding as to why action research is necessarily…

  13. Review:Progress in research on mixing techniques for transverse injection flow fields in supersonic crossflows

    Institute of Scientific and Technical Information of China (English)

    Wei HUANG; Li YAN

    2013-01-01

    The transverse injection flow field has an important impact on the flowpath design of scramjet engines.At present a combination of the transverse injection scheme and any other flame holder has been widely employed in hypersonic propulsion systems to promote the mixing process between the fuel and the supersonic freestream;combustion efficiency has been improved thereby,as well as engine thrust.Research on mixing techniques for the transverse injection flow field is summarized from four aspects,namely the jet-to-crossflow pressure ratio,the geometric configuration of the injection port,the number of injection ports,and the injection angle.In conclusion,urgent investigations of mixing techniques of the transverse injection flow field are proposed,especially data mining in the quantitative analytical results for transverse injection flow field,based on results from multi-objective design optimization theory.

  14. The Arts-Based Research’ approach: hints for educational research

    Directory of Open Access Journals (Sweden)

    Monica Pentassuglia

    2017-01-01

    Full Text Available The last two decades have seen a growing interest on the different ways of knowing in all the fields. Although some research has highlights the importance of this topic, there is still very little scientific understanding about this process. The first serious discussions and analyses of the construction of knowledge emerged during the 1900s. In Humanities field, questions have been raised about the use of traditional research paradigm considered unable for the understanding of these complex subjects. In this perspective, this article provided an important opportunity to advance the understanding of new research paths that not only overturn the classical perspective of research, but also allow us to reformulate and reinvent strategies, tools, and forms of representations of research findings. This article considers the implications of the approach of Arts-Based Research (ABR and deeply of dance-based methods for educational research.L’approccio dell’Arts-Based Research: quali spunti per la ricerca educativa?Tra i temi che più si sono imposti, negli ultimi anni, all’attenzione dei ricercatori, è il problema dei processi di costruzione della conoscenza ad aver catalizzato su di sé la maggior parte degli studi; è soprattutto in ambito umanistico che cresce l’idea secondo cui i classici paradigmi di ricerca non siano in grado di comprendere ed indagare la complessità dei fenomeni esplorati. Sulla scia di tali necessità, il presente contributo intende approfondire l’approccio dell’Arts-Based Research (ABR ed in particolare dei dance-based methods nel campo della ricerca educativa che negli ultimi anni sta contribuendo a capovolgere l’impostazione classica del processo di ricerca a favore di nuovi percorsi in grado di utilizzare le potenzialità dell’Arte secondo nuove prospettive.

  15. Herding Cats: Geocuration Practices Employed for Field Research Data Collection Activities and Visualization by Blueprint Earth

    Science.gov (United States)

    Hoover, R.; Harrison, M.; Sonnenthal, N.; Hernandez, A.; Pelaez, J.

    2015-12-01

    Researchers investigating interdisciplinary topics must work to understand the barriers created by information siloes in order to productively collaborate on complex Earth science questions. These barriers create acute challenges when research is driven by observations rather than hypotheses, as communication between collaborators hinges on data synthesis techniques that often vary greatly between disciplines. Field data collection across disciplines creates even more challenges, and employing student researchers of varying abilities demands an approach that is structured, and yet still flexible enough to accommodate inherent differences in the subjective portions of student data collection. Blueprint Earth is performing system-level environmental observations in the broad areas of geology, biology, hydrology, and atmospheric science. Traditional field data collection methodologies are employed for ease of reproducibility, but must translate across disciplinary information siloes. Information collected must be readily useable in the formulation of hypotheses based on field observations, which necessitates an understanding of key metrics by all investigators involved in data analysis. Blueprint Earth demonstrates the ability to create clear data standards across several disciplines while incorporating a quality control process and this allows for conversion of data into functional visualizations. Additionally, geocuration is organized such that data will be ready for public dissemination upon completion of field research.

  16. At the Intersection Between Art and Research. Practice-Based Research in the Performing Arts

    DEFF Research Database (Denmark)

    of themes and discussions that exist around Practice-Based Research. Most of the contributers bring up their own artistic work for closer examination, and they all share the common premise of making neither just art nor just research. To address divergences between these two activities, and surpass them...... of three years. The contributors to this anthology are artists and academics. They each present their particular angle to the field based partly on debates that arose in the study circle. What is the difference between theory and practice? Of what nature is the knowledge of the performing artist? Can...... artistic work be original, political, ethical? How is the work disseminated? How can art as research have an impact on different art forms and on other types of research? What questions of identity does the researching artist face? Can his/her work be compared to a journey? The articles reflect a plurality...

  17. Conceptualising Higher Education Research and/or Academic Development as "Fields": A Critical Analysis

    Science.gov (United States)

    Clegg, Sue

    2012-01-01

    This paper calls into question the idea that we can simply think about higher education as a research field and explores different meanings of the term field. It asks whether there are related fields: research into higher education, academic development and disciplinary teaching research, rather than one. The approach of the paper is conceptual,…

  18. Mappings of Fields Based on Nominations.

    Science.gov (United States)

    Lenk, Peter

    1983-01-01

    Graphical representations of nominations and citations of colleagues in seven scientific fields--information science, human systems management, future studies, general systems, topology and differential geometry, and polymer chemistry--are presented. Conomination analysis and cocitation analysis are compared as techniques to study structure of…

  19. Research-based design & design-based research: Affordances, limitations and synergies

    NARCIS (Netherlands)

    McKenney, Susan

    2015-01-01

    Research-based design is an orientation to educational development that is explicitly informed by existing research as well as formative evaluation. Design-based research is a genre of inquiry in which the design of innovative solutions to problems in educational practice provides the context for

  20. Research on BOM based composable modeling method

    NARCIS (Netherlands)

    Zhang, M.; He, Q.; Gong, J.

    2013-01-01

    Composable modeling method has been a research hotpot in the area of Modeling and Simulation for a long time. In order to increase the reuse and interoperability of BOM based model, this paper put forward a composable modeling method based on BOM, studied on the basic theory of composable modeling m

  1. The use of metabolomics in population-based research.

    Science.gov (United States)

    Su, L Joseph; Fiehn, Oliver; Maruvada, Padma; Moore, Steven C; O'Keefe, Stephen J; Wishart, David S; Zanetti, Krista A

    2014-11-01

    The NIH has made a significant commitment through the NIH Common Fund's Metabolomics Program to build infrastructure and capacity for metabolomics research, which should accelerate the field. Given this investment, it is the ideal time to start planning strategies to capitalize on the infrastructure being established. An obvious gap in the literature relates to the effective use of metabolomics in large-population studies. Although published reports from population-based studies are beginning to emerge, the number to date remains relatively small. Yet, there is great potential for using metabolomics in population-based studies to evaluate the effects of nutritional, pharmaceutical, and environmental exposures (the "exposome"); conduct risk assessments; predict disease development; and diagnose diseases. Currently, the majority of the metabolomics studies in human populations are in nutrition or nutrition-related fields. This symposium provided a timely venue to highlight the current state-of-science on the use of metabolomics in population-based research. This session provided a forum at which investigators with extensive experience in performing research within large initiatives, multi-investigator grants, and epidemiology consortia could stimulate discussion and ideas for population-based metabolomics research and, in turn, improve knowledge to help devise effective methods of health research. © 2014 American Society for Nutrition.

  2. Parents, Practitioners, and Researchers: Community-Based Participatory Research With Early Head Start

    Science.gov (United States)

    McAllister, Carol L.; Green, Beth L.; Terry, Martha Ann; Herman, Vivian; Mulvey, Laurie

    2003-01-01

    Community-based participatory research (CBPR) is an approach to research and evaluation that is receiving increased attention in the field of public health. Our report discusses the application of this approach to research and evaluation with an Early Head Start (EHS) program in Pittsburgh, Pa. Our primary purpose is to illustrate the key elements that contributed to effective collaboration among researchers, EHS practitioners, and parents of EHS children in the conduct of the study. The focus is not on research findings but on research process. Our goal is to make the practices of CBPR visible and explicit so they can be analyzed, further developed, and effectively applied to a range of public health issues in a diversity of community contexts. PMID:14534219

  3. Science communication in the field of fundamental biomedical research (editorial).

    Science.gov (United States)

    Illingworth, Sam; Prokop, Andreas

    2017-10-01

    The aim of this special issue on science communication is to inspire and help scientists who are taking part or want to take part in science communication and engage with the wider public, clinicians, other scientists or policy makers. For this, some articles provide concise and accessible advice to individual scientists, science networks, or learned societies on how to communicate effectively; others share rationales, objectives and aims, experiences, implementation strategies and resources derived from existing long-term science communication initiatives. Although this issue is primarily addressing scientists working in the field of biomedical research, much of it similarly applies to scientists from other disciplines. Furthermore, we hope that this issue will also be used as a helpful resource by academic science communicators and social scientists, as a collection that highlights some of the major communication challenges that the biomedical sciences face, and which provides interesting case studies of initiatives that use a breadth of strategies to address these challenges. In this editorial, we first discuss why we should communicate our science and contemplate some of the different approaches, aspirations and definitions of science communication. We then address the specific challenges that researchers in the biomedical sciences are faced with when engaging with wider audiences. Finally, we explain the rationales and contents of the different articles in this issue and the various science communication initiatives and strategies discussed in each of them, whilst also providing some information on the wide range of further science communication activities in the biomedical sciences that could not all be covered here. Copyright © 2017 The Authors. Published by Elsevier Ltd.. All rights reserved.

  4. Research Priorities in the Field of Patient Safety in Iran: Results of a Delphi Study.

    Science.gov (United States)

    Ravaghi, Hamid; Sajadi, Haniye Sadat

    2015-06-12

    There is inadequate evidence to direct and support patient safety practice. Therefore, identifying research priorities in this field is relevant for many stakeholders. This study, which was built on the World Health Organization work, aimed to identify and prioritize research topics for patient safety in Iran. A 3-round Modified Delphi process was used. We purposefully recruited a panel of 45 policy makers, planners, health care managers and staff, and academic members with experience or expertise in patient safety research. A review of the literature was used to develop the first questionnaire, including 24 research topics. Respondents were asked to rate their agreement with each research topic and propose new topics. Based on the results of round 1, the second questionnaire was developed and the respondents were requested to rate 45 research topics and also put similar research topics in the same groups. Given the responses of round 2, the third questionnaire including a list of 45 research priorities categorized in 4 groups was developed. Respondents were asked to reflect their opinions. Content analysis was used to analyze round 1 data and descriptive statistics for round 2 and round 3 data. Forty-five identified research topics in round 1 prioritized and grouped in subsequent rounds. Among 4 research groups, the extent and epidemiology threatening patient safety group received the highest priority; and among research topics, adverse drug events and its epidemiology were the top-ranked research priorities. In addition to the priorities identified in previous work, more research priorities that reflect important and needed issue related to patient safety, especially in Iran, were recognized. This priority research list, which most stakeholders agree with it, can serve as a blueprint for patient safety research.

  5. Implementation and research on the reconstruction algorithms of pressure fields based on PIV%基于PIV技术的压力场重构算法实现与研究

    Institute of Scientific and Technical Information of China (English)

    刘顺; 徐惊雷; 俞凯凯

    2016-01-01

    The basic principles and the corresponding algorithms of the finite volume method, the direct integral method and the Poisson equation method are introduced in detail,which are used to reconstruct the pressure fields based on PIV velocity fields.The instantaneous velocity fields of two incompressible flows,including the pipe flow with a sudden expansion and the flow around a square,are selected to study the influence of picture noise,velocity error,interpolation methods,the type and the precision of boundary conditions on reconstructed pressure fields by using different reconstruction algorithms.Finally,the transient pressure distributions of the pipe flow with a sudden expansion at 20ms are obtained by using the three algorithms respectively as well as the CFD.It shows that the finite volume method and the direct integral method are easily affected by noise to produce rude shocks,but maintain high accuracy in a larger range of error in velocity fields while they can get higher precision of reconstructed pressure fields with bilinear in-terpolation;the Poisson equation method isn’t easily affected by noise so it produces few shocks, and has great advantages with the accurate PIV velocity fields while it can get higher precision of reconstructed pressure fields with bicubic interpolation;by measuring only several pressure points on the boundaries,the mixed boundary condition gets the accurate reconstructed pressure fields which are close to those of the Dirichlet boundary condition and far better than those of the Neumann boundary condition;the error of boundary conditions reduces the precision of recon-structed pressure fields,which is more severe than the error of velocity fields.%介绍了有限容积法、直接积分法和Poisson方程法3种基于PIV瞬时速度场重构压力场的基本原理以及相应的计算方法,选取管流突扩流场和偏置方块绕流流场两个不可压缩流场的瞬时速度场数据,采用上述3种压力场重构算

  6. Near-Field Ultrasonic Phased Array Deflection Focusing Based CFRP Wing Box Structural Health Monitoring

    OpenAIRE

    Yajie Sun; Yonghong Zhang; Chengshan Qian; Zijia Zhang

    2013-01-01

    Near-field ultrasonic phased array theory is researched and utilized in the carbon-fiber wing box to identify the damage in the structure. Near-field ultrasonic phased array based structural health monitoring is researched to overcome the limitation of the far-field ultrasonic phased array in monitoring scope. The time delay of the theory and the process of the damage identification method are researched in detail. The recognition result is shown in a mapped image. The proposed method is appl...

  7. Near-Field Ultrasonic Phased Array Deflection Focusing Based CFRP Wing Box Structural Health Monitoring

    OpenAIRE

    Yajie Sun; Yonghong Zhang; Chengshan Qian; Zijia Zhang

    2013-01-01

    Near-field ultrasonic phased array theory is researched and utilized in the carbon-fiber wing box to identify the damage in the structure. Near-field ultrasonic phased array based structural health monitoring is researched to overcome the limitation of the far-field ultrasonic phased array in monitoring scope. The time delay of the theory and the process of the damage identification method are researched in detail. The recognition result is shown in a mapped image. The proposed method is appl...

  8. Translating research findings to promote peace: moving from "field to forum" with verbatim theatre.

    Science.gov (United States)

    Liehr, Patricia; Morris, Kate; Leavitt, Mary Ann; Takahashi, Ryutaro

    2013-01-01

    Peace, both personal and global, resides in understanding. Verbatim theatre is introduced as a vehicle for translating research findings to promote understanding and thereby, promote health. By shifting our translation lens from "bench to bedside" to "field to forum," new opportunities arise for moving nursing research-findings to an engaged audience. Stories from Pearl Harbor and Hiroshima survivors were woven into the verbatim performance, With Their Voices Raised. Analysis of audience members' reflections after the performance suggests that verbatim theatre created a connection based in openness, engagement, and trust that informed understanding and raised awareness about peace processes.

  9. Evolution of Attitudes in the Field of Human Research Ethics

    Directory of Open Access Journals (Sweden)

    Hugo Escobar-Melo

    2008-05-01

    Full Text Available The state of evolution of attitudes in a sample of 142 Medical Students at the Pontificia Universidad Javeriana in Bogota (at the beginning, middle and ending of their studies in the field of Human Research Ethics (HRE is analytically described. A complex scale of attitudes was used, with three components: affective, beliefs-related and behavioral, further divided into three theoretical categories taken from Bioethics: Subject-End/means- Dignity, Benefit and Justice. The relationship between the current medical education process and the attitudes regarding HRE in the sample are analyzed.A small trend towards progress in all categories and in all components of attitudes throughout medical education is described; neither the Benefit nor the Subject-End/means/Dignity categories evolve in a significant way; some significant differences were observed in the Justice category (beliefs and behavioral and in the Subject-End/means-Dignity category (beliefs component. The results allow for asking about the role of formation and evolution of those attitudes throughout the academic process. In conclusion, attitudes seem to be progressing relatively, without a decisive evolution.

  10. A Review on RF Field Exposure from Cellular Base Stations

    National Research Council Canada - National Science Library

    Amar Renke; Mahesh Chavan

    2014-01-01

      This review paper, takes into account previously published papers based on human exposure to electromagnetic fields which is radiated from cellular base stations and its corresponding adverse effects on human beings...

  11. Music, dance and memory: Towards deliberation of field research of dance

    Directory of Open Access Journals (Sweden)

    Rakočević Selena

    2015-01-01

    Full Text Available Although ethnochoreology and ethnomusicology as related academic disciplines have decades-long histories, reviewing and redefining their basic epistemological and methodological principles remained one of the main focuses of disciplinary discussion. Most ethnochoreologists and ethnomusicologist agrees that “field” work (in all its traditional and contemporary forms remains an essential and constitutive quality of their research and disciplinary fields. The inherent interdisciplinary networking of ethnochoreology and ethnomusicology starts from the theoretical premise that the relationship between the kinetic and musical components of dance is not only unbreakable, but also interactive, and that complex and dynamic manifestations of dance performances represents an expressive medium through which a particular community constructs and represents itself. Since the importance of the individual experience of researchers has been ephasized during the last few decades, a comprehensive method of participant observation remains a central and unifying aspect of fieldwork, both in ethnochoreology and ethnomusicology. Based on field research of musical and dance practices of the village of Svinica (Sviniţa in Romania, this paper reviews the application and combination of various methods of field research (observation, participation in the performance process, filming, interviews and writing field notes as the primary tools for the acquisition and shaping of scientific knowledge about dance and music. Issues that will be discussed include the following questions: What are the advantages of personal kinetic/auditory experience during simultaneous perception of dance movement and dance music? How can different methods of field research be combined in order to improve cognitive processes? Are there border areas between ethnochoreological and ethnomusicological fieldwork? Does the variety of methods of field research represents a weakness of the

  12. Stakeholders Analysis: A new field of research in tourism

    Directory of Open Access Journals (Sweden)

    Saulo Fabiano Amâncio Vieira

    2012-09-01

    Full Text Available This article attempts to make a bibliography on works about the stakeholder analysis and identify possible research topics in tourism. The survey was conducted in January 2010, using the base of science web of references, organized according to their impact factor of publication, focusing on the theme stakeholder analysis, which found 1,296 articles from 200 of these were selected most relevant (by impact factor, which was made a preliminary analysis of its contents and addressed effectively separated those theoretical aspects of stakeholder analysis, making a list of 51 articles. In relation to its central theme, rose: Environment (13 Social Networking (8, Decision Making, (9 Public Policy (6, Project Management (4 and Literature Review (11. Predominates in these articles the qualitative approach with 42 (82%. There is growing interest on the use of thematic analysis of stakeholders, from 2005 the frequency of publication of these articles have been stepped up (39 articles, demonstrating the potential and maturity of the theory. He also noted that there are different theoretical approaches to stakeholder analysis that can be exploited in research on tourism, and found five articles addressing the topic.

  13. Hybrid multilevel plane wave based near-field far-field transformation utilising combined near- and far-field translations

    Directory of Open Access Journals (Sweden)

    C. H. Schmidt

    2009-05-01

    Full Text Available The radiation of large antennas and those operating at low frequencies can be determined efficiently by near-field measurement techniques and a subsequent near-field far-field transformation. Various approaches and algorithms have been researched but for electrically large antennas and irregular measurement contours advanced algorithms with low computation complexity are required. In this paper an algorithm employing plane waves as equivalent sources and utilising efficient diagonal translation operators is presented. The efficiency is further enhanced using simple far-field translations in combination with the expensive near-field translations. In this way a low complexity near-field transformation is achieved, which works for arbitrary sample point distributions and incorporates a full probe correction without increasing the complexity.

  14. Research on Judgment Aggregation Based on Logic

    Directory of Open Access Journals (Sweden)

    Li Dai

    2014-05-01

    Full Text Available Preference aggregation and judgment aggregation are two basic research models of group decision making. And preference aggregation has been deeply studied in social choice theory. However, researches of social choice theory gradually focus on judgment aggregation which appears recently. Judgment aggregation focuses on how to aggregate many consistent logical formulas into one, from the perspective of logic. We try to start with judgment aggregation model based on logic and then explore different solutions to problem of judgment aggregation.

  15. Bridging the terahertz near-field and far-field observations of liquid crystal based metamaterial absorbers

    Science.gov (United States)

    Wang, Lei; Ge, Shijun; Chen, Zhaoxian; Hu, Wei; Lu, Yanqing

    2016-09-01

    Metamaterial-based absorbers play a significant role in applications ranging from energy harvesting and thermal emitters to sensors and imaging devices. The middle dielectric layer of conventional metamaterial absorbers has always been solid. Researchers could not detect the near field distribution in this layer or utilize it effectively. Here, we use anisotropic liquid crystal as the dielectric layer to realize electrically fast tunable terahertz metamaterial absorbers. We demonstrate strong, position-dependent terahertz near-field enhancement with sub-wavelength resolution inside the metamaterial absorber. We measure the terahertz far-field absorption as the driving voltage increases. By combining experimental results with liquid crystal simulations, we verify the near-field distribution in the middle layer indirectly and bridge the near-field and far-field observations. Our work opens new opportunities for creating high-performance, fast, tunable, terahertz metamaterial devices that can be applied in biological imaging and sensing. Project supported by the National Basic Research Program of China (Grant No. 2012CB921803), the National Natural Science Foundation of China (Grants Nos. 61225026, 61490714, 11304151, and 61435008), the Natural Science Foundation of Jiangsu Province, China (Grant Nos. BK20150845 and 15KJB140004), the Open Foundation Project of National Laboratory of Solid State Microstructures, China (Grant No. M28003), and the Research Center of Optical Communications Engineering & Technology, Jiangsu Province, China.

  16. SOLIDIFICATION OF NICKEL-BASED SINGLE CRYSTAL SUPERALLOY BY ELECTRIC FIELD

    Institute of Scientific and Technical Information of China (English)

    Y.S. Yang; X.H. Feng; G.F. Cheng; Y.J. Li; Z.Q. Hu

    2005-01-01

    The crystal growth of a nickel-based single crystal superalloy DD3 was researched via controlled directional solidification under the action of a DC electric field. The cellular or dendrite spacing of the single crystal superalloy is refined and microsegregation of alloying elements Al,Ti, Mo and W, is reduced by the electric field. The electric field decreases the interface stability and reduces the critical growth rate of the cellular-dendritic translation because of Thomson effect and Joule heating. The precipitation of the γ' phase is more uniform and the size of the γ'phase is smaller with the electric field than that without the electric field.

  17. 基于隐条件随机场的异构Web数据源数据抽取算法研究%Research on Heterogeneous Web Data Extraction Algorithm Based on Hidden Conditional Random Fields

    Institute of Scientific and Technical Information of China (English)

    於实

    2012-01-01

    提出了一种基于改进的隐条件随机场的异构Web数据源数据抽取算法.通过对隐条件随机场进行的改进,对隐含变量进行更为准确的计算,并且克服了该模型的性能严重依赖于初始参数选择的问题,而且进行模型训练时不需要大量的人工标注的样本数据.实验结果表明,对比已有方法,本文算法在对具有缺省属性以及多属性特征的网站进行数据抽取时,在查全率,查准率以及F1值上都获得了令人满意的性能.%In this paper, we propose a novel heterogeneous Web data extraction algorithm based on modified hidden conditional random fields model. Firstly, the hidden conditional random fields model is modified to obtain more accurate calculation of implicit variables, and the problem that the model' s performance is heavily dependent on the choice of initial parameters is well solved. Moreover, the proposed model does not require a lot of manual labeling sample data to construct training data. Experimental results show that compared with the existing method, the proposed algorithm can obtain satisfactory performance both in websites with the default attributes and the websites with multi-attributes.

  18. Multi-Disciplinary Research Experiences Integrated with Industry –Field Experiences

    Directory of Open Access Journals (Sweden)

    Suzanne Lunsford

    2015-10-01

    Full Text Available The purpose of this environmentally inquiry-based lab was to allow the students to engage into real-world concepts that integrate industry setting (Ohio Aggregate Industrial Mineral Association with the academia setting. Our students are engaged into a field trip where mining occurs to start the problem based learning of how the heavy metals leak in the mining process. These heavy metals such as lead and indium in the groundwater are a serious concern for the environment (Environmental Protection Agency from the mining process. The field experiences at the mining process assist in building our students interest in developing sensors to detect heavy metals of concern such as lead and indium simultaneously by a unique electrochemistry technique called Square Wave Anodic Stripping Voltammetry (SWASV. The field experience assists building the students interest in real –world application and what qualities do they want the electrochemical sensor to possess to be successful for real world usage. During the field trip the students are engaged into learning novel instrumentation such as an SEM (Scanning Electron Microscope to study the working electrode sensor developed to understand the sensor surface morphology properties better as well. The integration of industry setting with academia has been a positive experience for our students that has allowed their understanding of real-world science research needs to succeed in an industrial setting of research.

  19. Reflection: Research by Design: Design-Based Research and the Higher Degree Research Student

    Science.gov (United States)

    Kennedy-Clark, Shannon

    2015-01-01

    The article "Research by design: Design-based research and the higher degree research student" (Kennedy-Clark, 2013) appeared in the "Journal of Learning Design" Volume 6, Issue 2 in 2013. Two years on, Shannon Kennedy-Clark reflects upon her original article. Upon being asked to revisit this article the author reflected upon…

  20. Geothermal emissions data base, Wairakei geothermal field

    Energy Technology Data Exchange (ETDEWEB)

    Schwartz, S.R. (comp.)

    1978-04-01

    A database subset on the gaseous emissions from the Wairakei geothermal field is presented. Properties and states of the reservoir fluid such as flow rates, wellhead pressure, and enthalpy are included in the file along with the well name and constituent measurement. This subset is the result of an initial screening of the data covering 1965 to 1971, and new additions will be appended periodically to the file. The data is accessed by a database management system as are all other subsets in the file. Thereby, one may search the database for specific data requirements and print selective output. For example, one may wish to locate reservoir conditions for cases only when the level of the constituent exceeded a designated value. Data output is available in the form of numerical compilations such as the attached, or graphical displays disposed to paper, film or magnetic tape.

  1. The Emancipatory Potential of Arts-Based Research for Social Justice

    Science.gov (United States)

    Osei-Kofi, Nana

    2013-01-01

    In the quest for anti-oppressive research practices grounded in a commitment to social justice, arts-based research holds promise for scholars in a wide range of disciplines and fields of study, including education. In this article, I discuss the possibilities and challenges of social justice-informed arts-based research, drawing on data from a…

  2. Contributions from assited human reproduction techniques' socio-legal research to the legislative field

    Directory of Open Access Journals (Sweden)

    Marisa Herrera

    2017-03-01

    Full Text Available This paper’s intention is to share some of the main results of two field-based research projects regarding assisted human reproduction practices in Argentina. Both projects have been developed in a dynamic legislative context involving medical coverage regulation, parentage determination and the right to know one's origins for children born with third party genetic material. Also, in this context, the Draft Civil and Commercial Code reform introduced two figures that were then removed in the parliamentary debate: post mortem fertilization and surrogate motherhood. All these issues concerning the use of assisted human reproduction challenge the legal field and are addressed in these research projects, one of them more from an explorative perspective and the other from a qualitative one. Therefore, this article aims to introduce some of the measured variables and the findings obtained to serve as relevant contributions to achieve a more appropriate legislation according with the medical and social reality.

  3. Research on Visualization in Scientific Computation of Grinding Temperature Field

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    The paper introduces the concepts, classification and method of visualization in scientific computation. Visual C++ developing tool is used to compute surface grinding forces and grinding temperature field models. The three-dimensional entity model of workpiece is made with OpenGL tool, and the different colors on the workpiece entity show different value of temperature, so the visualization of grinding temperature field is realized. The temperature value of every points in grinding temperature field, the c...

  4. A kind of signature scheme based on class groups of quadratic fields

    Institute of Scientific and Technical Information of China (English)

    董晓蕾; 曹珍富

    2004-01-01

    Quadratic-field cryptosystem is a cryptosystem built from discrete logarithm problem in ideal class groups of quadratic fields(CL-DLP). The problem on digital signature scheme based on ideal class groups of quadratic fields remained open, because of the difficulty of computing class numbers of quadratic fields. In this paper, according to our researches on quadratic fields, we construct the first digital signature scheme in ideal class groups of quadratic fields, using q as modulus, which denotes the prime divisors of ideal class numbers of quadratic fields. Security of the new signature scheme is based fully on CL-DLP. This paper also investigates realization of the scheme, and proposes the concrete technique. In addition, the technique introduced in the paper can be utilized to realize signature schemes of other kinds.

  5. RESEARCH ON A MAGNETIC FIELD IN ELECTROLYTIC LAPPING

    Institute of Scientific and Technical Information of China (English)

    1999-01-01

    Taking electrolytic lapping stainless steel for example, the principle of electrolytic lapping with a magnetic field is described, the movement of charged particles in the magnetic field is analyzed in tems of theory. Using a computer, the motion loci of the charged particles in the magnetic field are simulated. The theory and the experiment show that the magnetic field can accelerate the diffusion and mobility of the charged particles, accelerate the electrochemical reaction and reduce the surface roughness of the work more quickly, which improves the lapping efficiency.

  6. Research of Knowledge Representation Building in the Field of Corn Based on Ontology%基于本体的玉米领域知识表示构建研究

    Institute of Scientific and Technical Information of China (English)

    张莹; 陈桂芬

    2012-01-01

    传统的人工智能采用不同的建模方法、开发工具进行知识表示,使得各种知识表示之间缺乏互操作性,本体的引入解决了这一问题。对基于本体的知识表示方法进行了探索,对玉米领域知识本体进行了构建。结果表明,本体可有效地解决复杂知识间表达的异构问题,使计算机对信息的理解升至为语义层次,利于玉米智能系统的研制。%Different modeling methods and tools were used in the traditional artificial intelligence to express knowledge,which led to the lack of interoperability between all kinds of knowledge,and ontology could solve the problem.In this paper,the knowledge representation method based on ontology was investigated,and the corn field knowledge ontology was built.The result showed that ontology could effectively solve the heterogeneous problem of expression of complex knowledge and make the computer to understand information for the semantic level,and benefit to develop the intelligent systems of corn.

  7. 基于元数据的军械保障信息资源共享服务研究%Research on Information Sharing Service Based on Metadata in the Field of Ordance Support

    Institute of Scientific and Technical Information of China (English)

    周立军; 邢红宏; 张杰

    2013-01-01

    Based on the problem of heterogeneous information among different systems in the field of Ordance Support, and in view of the characteristic of metadata, the thesis raises a solution to resource sharing of Web Service on the basis of metadata. In this thesis, we designed a transitional information format which names SXML, as a bridge of information exchange. JDBC and JDOM are respectively applied to the design of Wrapper and Parser, and the exchange of heterogeneous information was realized finally.%针对军械保障领域内不同信息系统之间的异构问题和元数据的特点,提出了基于元数据的 Web Service资源共享解决方案。设计了一种SXML统一中间信息格式,作为信息交换调用的桥梁,将JDBC和JDOM应用于信息包装器和信息解析器的设计,实现了异构信息的交换。

  8. Radiofrequency fields: Bases for exposure limits

    Energy Technology Data Exchange (ETDEWEB)

    Paolo Vecchia [Department of Technologies and Health National Institute of Health, Rome (Italy)

    2006-07-01

    Several biological effects have been reported at exposure levels below the threshold for thermal effects, but most of them require independent confirmation before being accepted as established. However, no seems to have relevant implications for human health. Precautionary measures should be based on a cost/benefit analysis, and be proportionate on one side to the risk they aim at preventing and on the other side to actions taken in other areas to prevent comparable risks. (N.C.)

  9. Electric Field Encephalography as a tool for functional brain research: a modeling study.

    Directory of Open Access Journals (Sweden)

    Yury Petrov

    Full Text Available We introduce the notion of Electric Field Encephalography (EFEG based on measuring electric fields of the brain and demonstrate, using computer modeling, that given the appropriate electric field sensors this technique may have significant advantages over the current EEG technique. Unlike EEG, EFEG can be used to measure brain activity in a contactless and reference-free manner at significant distances from the head surface. Principal component analysis using simulated cortical sources demonstrated that electric field sensors positioned 3 cm away from the scalp and characterized by the same signal-to-noise ratio as EEG sensors provided the same number of uncorrelated signals as scalp EEG. When positioned on the scalp, EFEG sensors provided 2-3 times more uncorrelated signals. This significant increase in the number of uncorrelated signals can be used for more accurate assessment of brain states for non-invasive brain-computer interfaces and neurofeedback applications. It also may lead to major improvements in source localization precision. Source localization simulations for the spherical and Boundary Element Method (BEM head models demonstrated that the localization errors are reduced two-fold when using electric fields instead of electric potentials. We have identified several techniques that could be adapted for the measurement of the electric field vector required for EFEG and anticipate that this study will stimulate new experimental approaches to utilize this new tool for functional brain research.

  10. CORPUS-BASED TRANSLATION RESEARCH: ITS ...

    African Journals Online (AJOL)

    Corpus-based translation research emerged in the late 1990s as a new area of re- search in ... tics goes back to the early 1960s when the “first-generation” of one-million .... and then takes an average count at the end; allowing one to compare.

  11. Advances in Design-Based Research

    Science.gov (United States)

    Svihla, Vanessa

    2014-01-01

    Design-based research (DBR) is a core methodology of the Learning Sciences. Historically rooted as a movement away from the methods of experimental psychology, it is a means to develop "humble" theory that takes into account numerous contextual effects for understanding how and why a design supported learning. DBR involves iterative…

  12. Using the Agent-Based Modeling in Economic Field

    Directory of Open Access Journals (Sweden)

    Nora Mihail

    2006-12-01

    Full Text Available The last ten years of the XX century has been the witnesses of the apparition of a new scientific field, which is usually defined as the study of “Complex adaptive systems”. This field, generic named Complexity Sciences, shares its subject, the general proprieties of complex systems across traditional disciplinary boundaries, with cybernetics and general systems theory. But the development of Complexity Sciences approaches is determined by the extensive use of Agent-Based-Models (ABM as a research tool and an emphasis on systems, such as markets, populations or ecologies, which are less integrated or “organized” than the ones, such as companies and economies, intensively studied by the traditional disciplines. For ABM, a complex system is a system of individual agents who have the freedom to act in ways that are not always totally predictable, and whose actions are interconnected such that one agent’s actions changes the context (environment for other agents. These are many examples of such complex systems: the stock market, the human body immune system, a business organization, an institution, a work-team, a family etc.

  13. Field guide to research at Neal Smith National Wildlife Refuge

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This document contains a summary of research conducted at Neal Smith National Wildlife Refuge. Research at Neal Smith has resulted in the publication of over 60...

  14. Basic research in the field of thermal infrared remote sensing

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    This overview paper points out that one of the problems impeding further development of remote sensing is that not much attention has been paid to basic research.Key contents of basic research in remote sensing,including modeling,inversion,scaling and scientific experiments,are reviewed.Significance of basic research is demonstrated through summarizing the intentions and progress of the project "Quantitative Remote Sensing Research on Land Surface Energy Exchange".

  15. Basic research in the field of thermal infrared remote sensing

    Institute of Scientific and Technical Information of China (English)

    徐冠华

    2000-01-01

    This overview paper points out that one of the problems impeding further development of remote sensing is that not much attention has been paid to basic research. Key contents of basic research in remote sensing, including modeling, inversion, scaling and scientific experiments, are reviewed. Significance of basic research is demonstrated through summarizing the intentions and progress of the project "Quantitative Remote Sensing Research on Land Surface Energy Exchange".

  16. Neurophilia: Guiding Educational Research and the Educational Field?

    Science.gov (United States)

    Smeyers, Paul

    2016-01-01

    For a decade or so there has been a new "hype" in educational research: it is called educational neuroscience or even neuroeducation (and neuroethics)--there are numerous publications, special journals, and an abundance of research projects together with the advertisement of many positions at renowned research centres worldwide. After a…

  17. Register-based research on twins

    DEFF Research Database (Denmark)

    Christensen, Kaare; Ohm Kyvik, Kirsten; Holm, Niels V

    2011-01-01

    Introduction: The Danish Twin Registry (DTR) has for more than 50 years been based on surveys and clinical investigations and over the two last decades also on register linkage. Currently these two approaches are merged within Statistics Denmark. Research topics: Here we report on three major...... groups of register-based research in the DTR that used the uniqueness of twinning. First, we focus on the ''long-term prognosis'' of being a twin compared with being a singleton and show that Danish twins have health trajectories in adulthood similar to singletons, which is a result of interest for twins...... and their families as well as a test of the fetal origins hypothesis that states that fetal growth restriction has long-term health consequences. Secondly, we summarise some of the most important register-based ''classical twin studies'', e.g. heritability studies on lifespan and exceptional longevity. Finally, we...

  18. Higher Education as a Field of Study and Research in Europe

    Science.gov (United States)

    Kehm, Barbara M.

    2015-01-01

    This article describes the emergence of higher education as a field of research, scholarship and study. In the first part, the meaning of higher education as a field of research is defined contrasting Europe and the US. Then, the institutional basis of higher education research in Europe is analysed (learned societies, institutes and centres,…

  19. Base Program on Energy Related Research

    Energy Technology Data Exchange (ETDEWEB)

    Western Research Institute

    2008-06-30

    The main objective of the Base Research Program was to conduct both fundamental and applied research that will assist industry in developing, deploying, and commercializing efficient, nonpolluting fossil energy technologies that can compete effectively in meeting the energy requirements of the Nation. In that regard, tasks proposed under the WRI research areas were aligned with DOE objectives of secure and reliable energy; clean power generation; development of hydrogen resources; energy efficiency and development of innovative fuels from low and no-cost sources. The goal of the Base Research Program was to develop innovative technology solutions that will: (1) Increase the production of United States energy resources--coal, natural gas, oil, and renewable energy resources; (2) Enhance the competitiveness of United States energy technologies in international markets and assist in technology transfer; (3) Reduce the nation's dependence on foreign energy supplies and strengthen both the United States and regional economies; and (4) Minimize environmental impacts of energy production and utilization. This report summarizes the accomplishments of the overall Base Program. This document represents a stand-alone Final Report for the entire Program. It should be noted that an interim report describing the Program achievements was prepared in 2003 covering the progress made under various tasks completed during the first five years of this Program.

  20. Research on Thermal-Field and Sound-Field Coupling Properties of Different Grid Forms

    Directory of Open Access Journals (Sweden)

    Enlai Zhang

    2016-01-01

    Full Text Available The inlet grid and exhaust grid are widely used in engineering machinery products. The process that airflow goes through grids is a complex turbulent flow and directly related to the heat dispersion and aerodynamic noise. The theoretical analysis result shows that the jet noise generated by airflow has a connection with the grid structure form, fluid flowing situation, and heat conduction. In addition, the influences of different grid structure forms (included the round hole, long hole, and square hole and porosity on the heat dissipation and aerodynamic noise were analyzed and presented based on the verified computational fluid dynamics (CFD model. Results show that the heat dispersion and aerodynamic noise of the round hole are most effective under the same porosity; as the porosity increases, the disturbance degree decreases and the noise reduction effect gets better. Finally, the research result provides the scientific basis for improving grid structure and achieving energy saving and noise reduction.

  1. Outline of the safety research results, in the power reactor field, fiscal year 1996

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-11-01

    The Power Reactor and Nuclear Fuel Development Corporation (PNC) has promoted the safety research in fiscal year of 1996 according to the Fundamental Research on Safety Research (fiscal year 1996 to 2000) prepared on March, 1996. Here is described on the research results in fiscal year 1996, the first year of the 5 years programme, and whole outline of the fundamental research on safety research, on the power reactor field (whole problems on the new nuclear converter and the fast breeder reactor field and problems relating to the power reactor in the safety for earthquake and probability theoretical safety evaluation field). (G.K.)

  2. Developing Research on Performance-Based Functional Work Assessment : Report on the First International Functional Capacity Evaluation Research Meeting

    NARCIS (Netherlands)

    Reneman, M. F.; Soer, R.; Gross, D. P.

    2013-01-01

    Introduction Research on Performance-Based Work Assessment, also known as Functional Capacity Evaluation (FCE), has evolved substantially over the past decades. Although this field of research has developed, the use of FCE has been an object of discussion and debate internationally. Unfortunately, t

  3. International evaluation of Swedish research projects in the field of short rotation forestry for energy

    Energy Technology Data Exchange (ETDEWEB)

    Dawson, W.M. [N.I. Horticulture and Plant Breeding Station, Armagh (Ireland); Isebrands, J. [USDA Forest Service, North Central Forest Experiment Station, Rhinelander, WI (United States); Namkoong, G. [Univ. of British Columbia, Vancouver, BC (Canada). Dept. of Forest Sciences; Tahvanainen, J. [Univ. of Joensuu (Finland). Dept. of Biology

    1996-11-01

    The purpose of this evaluation was to inform NUTEK of the scientific quality of the research projects, as seen in an international context. The projects were therefore the main elements considered in the evaluation. The main basis of the evaluation was the scientific quality of the research and its relevance to NUTEK`s aims in the application of industrial research and development. The present report is based on the information contained in the written reports submitted by the grant holders, site visits and discussions between the grant holders and the Committee. The report first gives an overview and general recommendations concerning the overall programme in the field of Short Rotation Forestry for Energy. Thereafter, the 16 projects are evaluated separately

  4. DIGITAL HUMANISTIC PEDAGOGY: RELEVANT PROBLEMS OF SCIENTIFIC RESEARCH IN THE FIELD OF USING ICT IN EDUCATION

    Directory of Open Access Journals (Sweden)

    Valeriy Yu. Bykov

    2016-07-01

    Full Text Available In the article theoretical and methodological principles of digital humanistic pedagogy – the science about the laws of creating a positive integrated educational reality as a result of the convergence of physical and virtual (created using ICT training spaces (environments are determined. Based on the use of modern ICT learning activity (formal, nonformal and informal is at the intersection of two worlds: the real and the virtual. Methodology and research methods of classical pedagogy require review and improvement in the context of current realities of the educational process, needs and interests of all its subjects. The development of digital humanities in the international educational space is analyzed; the content of the new field of pedagogical knowledge as part of digital humanistic is outlined; research methods and directions of current scientific research are defined.

  5. Field Emission From Ordered Nano-array Structures Based on Porous Aluminum Oxide Templates

    Institute of Scientific and Technical Information of China (English)

    WANG; ChengWei

    2001-01-01

    This thesis reports my research work of fabricating nanostructures by using nanoporous anodic aluminum oxide (AAO) templates and their field emission properties in the past few years. Some important results obtained are as follows:  1. We first proposed a new concept of fabricating field emitters with ordered nanostructures based on porous aluminum oxide templates such as AAO/Al, metal/AAO, PANI/AAO, CNTs/AAO, Si/AAO and did a lot of research in this field.  ……

  6. NAGT-GER: A Community of Practice to Support the Emerging Field of Geoscience Education Research

    Science.gov (United States)

    Lukes, L.; LaDue, N.; Cheek, K.; Ryker, K.

    2014-12-01

    As the National Research Council noted in its 2012 report on discipline-based education research (DBER) in undergraduate science and engineering, in order to advance DBER as a field of inquiry, "a robust infrastructure is required to recognize and support [DBER] within professional societies." One way to develop such an infrastructure around geoscience education research is to create a community of practice within the broader geoscience education community. In recent years, the members of the National Association of Geoscience Teachers (NAGT) have created two divisions to support the geoscience education needs of specific subpopulations of the geoscience community: the 2YC division, focusing on community college issues, and TED, focusing on teacher education. This year marks the first year of a new division within the National Association of Geoscience Teachers (NAGT) focused on geoscience education research. The Geoscience Education Research division (GER) is committed to the promotion of high quality, scholarly research in geoscience education that improves teaching and learning in K-12, higher education, and informal learning environments. High quality DBER in geoscience requires the ability to connect current theories of teaching and learning with deep content-specific conceptual understanding. A community of practice like NAGT GER, has the potential to improve the quality of scholarly efforts in geoscience education by providing a forum for improving the collective knowledge and expertise of the geoscience education research community. Current division initiatives and efforts will be highlighted and time for dialogue on future directions will be included.

  7. Reflections on Design-Based Research

    DEFF Research Database (Denmark)

    Ørngreen, Rikke

    2015-01-01

    The paper is an extended and edited version of the HWID conference paper with the same titel. The paper discusses Design-Based Research (DBR), which is an approach that have a dual purpose: to develop domain theories and to develop the design, iteratively. The paper is an integrative review......, namely: Interaction Design and Action Research. The issues discussed are users’ needs, resistance, organizational relations, and alternative design solutions. Also, this type of online and competence development processes needs new empirical methods, and an argument for rigour in the DBR analysis...

  8. Field Testing Research at the NWTC (Fact Sheet)

    Energy Technology Data Exchange (ETDEWEB)

    2015-02-01

    The National Wind Technology Center (NWTC) at the National Renewable Laboratory (NREL) has extensive field testing capabilities that have been used in collaboration with the wind industry to accelerate wind technology development and deployment for more than 30 years.

  9. Field-Dependence and Extraversion: Univariate or Multivariate Research Orientation

    Science.gov (United States)

    1991-01-01

    EYSENCK, If. J. (1982) Review of Cognitive styles: essence and origins by H. A. Witkin and D. R. Goodenough. Personality and Individual Differences , 3...103. ’ EYSENCK, It. J. (1983) A repIv to Fine. Personality and Individual Differences , 4, 361. FIN•, B. J. (1972a) Field-dependent introvert and...Field-dependence. extraversion, Evsenck and autarkv. Personality and Individual Differences . 4. 1,59-1,60. FIN. 13. 1J. (1987) The effect of heat and

  10. Research on Field Emission and Dark Current in ILC Cavities

    Energy Technology Data Exchange (ETDEWEB)

    Liu, Kexin; Li, Yongming; Palczewski, Ari; Geng, Rongli

    2013-09-01

    Field emission and dark current are issues of concern for SRF cavity performance and SRF linac operation. Complete understanding and reliable control of the issue are still needed, especially in full-scale multi-cell cavities. Our work aims at developing a generic procedure for finding an active field emitter in a multi-cell cavity and benchmarking the procedure through cavity vertical test. Our ultimate goal is to provide feedback to cavity preparation and cavity string assembly in order to reduce or eliminate filed emission in SRF cavities. Systematic analysis of behaviors of field emitted electrons is obtained by ACE3P developed by SLAC. Experimental benchmark of the procedure was carried out in a 9-cell cavity vertical test at JLab. The energy spectrum of Bremsstrahlung X-rays is measured using a NaI(Tl) detector. The end-point energy in the X-ray energy spectrum is taken as the highest kinetic electron energy to predict longitudinal position of the active field emitter. Angular location of the field emitter is determined by an array of silicon diodes around irises of the cavity. High-resolution optical inspection was conducted at the predicted field emitter location.

  11. Fingerprint Matching Based on Local Relative Orientation Field

    Institute of Scientific and Technical Information of China (English)

    ZHU En; YIN Jian-ping; ZHANG Guo-min

    2004-01-01

    A fingerprint matching method based on local relative orientation field is proposed. It extracts local relative orientation field around each minutia for minutiae matching. Local orientation features are also used to sorting minutiae in order to speed up searching a minutia when pairing minutiae. The experimental result reveals that this method achieves improved recognition accuracy.

  12. Near-Field Nanolasers based on Nonradiating Anapole Modes

    KAUST Repository

    Gongora, J. S. Totero

    2016-05-31

    By employing ab-initio simulations of Maxwell-Bloch equations with a source of quantum noise, we study a new laser concept based on photonic dark-matter nanostructures that emit only in the near-field, with no far-field radiation pattern.

  13. U.S.-Portuguese Relations and Lajes Field Air Base

    Science.gov (United States)

    2014-12-01

    distribution is unlimited U.S.–PORTUGUESE RELATIONS AND LAJES FIELD AIR BASE Rui F. Amaral Captain, United States Air Force B.S., Park University ...by Manuel Martins entitled Base Aerea das Lajes (contribuicao para a sua historia ) Lajes Air Base11 specifically deals with the historical events...11 Manuel Martins, Base Aerea das Lajes (Contribuição Para a Sua Historia ) [Lajes Air Base (Contribution to its History)] (Azores

  14. Graphene-based field-effect transistor biosensors

    Energy Technology Data Exchange (ETDEWEB)

    Chen; , Junhong; Mao, Shun; Lu, Ganhua

    2017-06-14

    The disclosure provides a field-effect transistor (FET)-based biosensor and uses thereof. In particular, to FET-based biosensors using thermally reduced graphene-based sheets as a conducting channel decorated with nanoparticle-biomolecule conjugates. The present disclosure also relates to FET-based biosensors using metal nitride/graphene hybrid sheets. The disclosure provides a method for detecting a target biomolecule in a sample using the FET-based biosensor described herein.

  15. Research in corporate communication: An overview of an emerging field

    NARCIS (Netherlands)

    C.B.M. van Riel (Cees)

    1997-01-01

    textabstractVan Riel provides an overview of research in corporate communication, focusing on achievements found in the international academic literature in both communication and business school disciplines.

  16. Research in corporate communication: An overview of an emerging field

    NARCIS (Netherlands)

    C.B.M. van Riel (Cees)

    1997-01-01

    textabstractVan Riel provides an overview of research in corporate communication, focusing on achievements found in the international academic literature in both communication and business school disciplines.

  17. Boundary-Work in the Health Research Field: Biomedical and Clinician Scientists' Perceptions of Social Science Research

    Science.gov (United States)

    Albert, Mathieu; Laberge, Suzanne; Hodges, Brian D.

    2009-01-01

    Funding agencies in Canada are attempting to break down the organizational boundaries between disciplines to promote interdisciplinary research and foster the integration of the social sciences into the health research field. This paper explores the extent to which biomedical and clinician scientists' perceptions of social science research operate…

  18. Boundary-Work in the Health Research Field: Biomedical and Clinician Scientists' Perceptions of Social Science Research

    Science.gov (United States)

    Albert, Mathieu; Laberge, Suzanne; Hodges, Brian D.

    2009-01-01

    Funding agencies in Canada are attempting to break down the organizational boundaries between disciplines to promote interdisciplinary research and foster the integration of the social sciences into the health research field. This paper explores the extent to which biomedical and clinician scientists' perceptions of social science research operate…

  19. A research plan based on high intensity proton accelerator Neutron Science Research Center

    Energy Technology Data Exchange (ETDEWEB)

    Mizumoto, Motoharu [Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Tokai Research Establishment

    1997-03-01

    A plan called Neutron Science Research Center (NSRC) has been proposed in JAERI. The center is a complex composed of research facilities based on a proton linac with an energy of 1.5GeV and an average current of 10mA. The research facilities will consist of Thermal/Cold Neutron Facility, Neutron Irradiation Facility, Neutron Physics Facility, OMEGA/Nuclear Energy Facility, Spallation RI Beam Facility, Meson/Muon Facility and Medium Energy Experiment Facility, where high intensity proton beam and secondary particle beams such as neutron, pion, muon and unstable radio isotope (RI) beams generated from the proton beam will be utilized for innovative researches in the fields on nuclear engineering and basic sciences. (author)

  20. Graphene-based field effect transistors for radiation-induced field sensing

    Energy Technology Data Exchange (ETDEWEB)

    Di Gaspare, Alessandra, E-mail: alessandra.digaspare@lnf.infn.it [INFN-Laboratori Nazionali Frascati, Frascati, Rome (Italy); Valletta, Antonio [CNR-Istituto per la Microelettronica e i Microsistemi, TorVergata, Rome (Italy); Fortunato, Guglielmo [CNR-Istituto per la Microelettronica e i Microsistemi, TorVergata, Rome (Italy); INFN-Laboratori Nazionali Frascati, Frascati, Rome (Italy); Larciprete, Rosanna [CNR-Istituto di Sistemi Complessi, TorVergata, Rome (Italy); INFN-Laboratori Nazionali Frascati, Frascati, Rome (Italy); Mariucci, Luigi [CNR-Istituto per la Microelettronica e i Microsistemi, TorVergata, Rome (Italy); INFN-Laboratori Nazionali Frascati, Frascati, Rome (Italy); Notargiacomo, Andrea [CNR-Istituto di Fotonica e Nanotecnologie, Rome (Italy); INFN-Laboratori Nazionali Frascati, Frascati, Rome (Italy); Cimino, Roberto [INFN-Laboratori Nazionali Frascati, Frascati, Rome (Italy); CERN, Geneva (Switzerland)

    2016-07-11

    We propose the implementation of graphene-based field effect transistor (FET) as radiation sensor. In the proposed detector, graphene obtained via chemical vapor deposition is integrated into a Si-based field effect device as the gate readout electrode, able to sense any change in the field distribution induced by ionization in the underneath absorber, because of the strong variation in the graphene conductivity close to the charge neutrality point. Different 2-dimensional layered materials can be envisaged in this kind of device.

  1. Research plan and preliminary results - A field research site for emerging contaminants in Iowa

    Science.gov (United States)

    Schnoebelen, Douglas J.; Kolpin, Dana W.; Barber, Larry B.; Furlong, Edward T.; Meyer, Michael; Skopec, M.

    2006-01-01

    Research has recently documented the prevalence of a wide variety of pharmaceuticals and other emerging contaminants (ECs) in streams across the United States. Wastewater treatment plants (WWTPs) have been found to be an important source and collection point of ECs to streams as many ECs are incompletely removed during treatment. To investigate the complex in-stream processes (e.g., dilution, sorption, degradation, dispersion, etc.) that can affect ECs following their input from a WWTP and determining if such input is having an effect on the aquatic ecosystem requires the integration of multi-disciplinary efforts at a carefully selected field site. Preliminary work has identified an 8-km reach of Fourmile Creek in central Iowa as an ideal research site to investigate such important research questions pertaining to ECs. Unique aspects of Fourmile Creek included: (1) it single source effluent-dominated stream, (2) background data document the input of a wide variety of ECs from WWTP discharge, (3) small basin size, (4) relatively simple flow system, (5) background data suggest that undefined processes are taking place decreasing the level of select ECs during stream transport, (6) the WWTP uses a treatment technology (activated sludge) typical of many towns in Iowa and the United States (7) a hydrogeologic setting of a low-gradient, small stream (average discharge less than 1.41 m³/s) in glacial drift is typical of many areas in Iowa and across the Midwest, and (8) the existence of a low-head clam approximately 2 km upstream of the WWTP outfall allowing more accurate "above WWTP" and "below WWTP" comparisons in aquatic ecosystems. Furthermore, the WWTP is scheduled to close by 2011 providing a unique opportunity to determine how stream hydrology, water chemistry and aquatic biota react to the removal of the primary source of flow and ECs in this system. This will allow a novel "before" and "after" assessment not previously available in EC research. Research to date

  2. NEAR-FIELD ACOUSTIC HOLOGRAPHY FOR SEMI-FREE ACOUSTIC FIELD BASED ON WAVE SUPERPOSITION APPROACH

    Institute of Scientific and Technical Information of China (English)

    LI Weibing; CHEN Jian; YU Fei; CHEN Xinzhao

    2006-01-01

    In the semi-free acoustic field, the actual acoustic pressure at any point is composed of two parts: The direct acoustic pressure and the reflected acoustic pressure. The general acoustic holographic theories and algorithms request that there is only the direct acoustic pressure contained in the pressure at any point on the hologram surface, consequently, they cannot be used to reconstruct acoustic source and predict acoustic field directly. To take the reflected pressure into consideration, near-field acoustic holography for semi-free acoustic field based on wave superposition approach is proposed to realize the holographic reconstruction and prediction of the semi-free acoustic field, and the wave superposition approach is adopted as a holographic transform algorithm. The proposed theory and algorithm are realized and verified with a numerical example,and the drawbacks of the general theories and algorithms in the holographic reconstruction and prediction of the semi-free acoustic field are also demonstrated by this numerical example.

  3. BIOREMEDIATION OF HAZARDOUS WASTES - RESEARCH, DEVELOPMENT AND FIELD EVALUATIONS - 1995

    Science.gov (United States)

    The proceedings of the 1995 Symposium on Bioremediation of Hazardous Wastes, hosted by the Office of Research and Development (ORD) of the EPA in Rye Brook, New York. he symposium was the eighth annual meeting for the presentation of research conducted by EPA's Biosystems Technol...

  4. Research in Corporate Communication: An Overview of an Emerging Field.

    Science.gov (United States)

    van Riel, Cees B. M.

    1997-01-01

    Provides an overview of research in corporate communication, focusing on achievements found in the international academic literature in both communication and business school disciplines. Gives three key concepts in such research: corporate identity, corporate reputation, and orchestration of communication. Advocates an interdisciplinary approach…

  5. Research by Design: Design-Based Research and the Higher Degree Research student

    Science.gov (United States)

    Kennedy-Clark, Shannon

    2013-01-01

    Design-based research lends itself to educational research as the aim of this approach is to develop and refine the design of artefacts, tools and curriculum and to advance existing theory or develop new theories that can support and lead to a deepened understanding of learning. This paper provides an overview of the potential benefits of using a…

  6. STRATEGY-AS-PRACTICE RESEARCH: INITIAL CONSIDERATIONS ON THE FIELD IN BRAZIL

    Directory of Open Access Journals (Sweden)

    Julio Ernesto Colla

    2012-12-01

    Full Text Available The objective of the present article was to verify the conceptual position and onto-epistemological of the Brazilian researchers in Strategy-as-Practice from the concepts proclaimed for the movement. The theoretical base presents the conceptual revision of the field that served of script for the analysis of the data. It treated, therefore of the elements of strategizig: praxis, practices and practitiones. After this deals with the agenda and agency in which the movement needs to insert itself. Following the theoretical base perspective onto-epistemológicas ontológicas are presented and that assist the agreement of the strategical phenomenon for the optics of that Strategy is what the people do. The data are the source documents. The determination of articles to be analyzed occurred for the manipulation of articles following a pre-established script. The results of the research make indication of a set sufficiently diversified of conceptual positions with sights to remedy the faced questionings that can be influenced by the context where the researcher is inserted. Also it was found that when passing of the years it had extrapolação of the subject for other seek areas, not having limitation of the subject only in the area of strategy as at the beginning of the presentation of papers in Brazil. The data of the research report that the characterization in a Brazilian onto-epistemological way of performance in the research in Strategy-as-Practice is not possible still.

  7. On the bibliometric coordinates of four different research fields in Geography.

    Science.gov (United States)

    Gorraiz, Juan; Gumpenberger, Christian; Glade, Thomas

    This study is a bibliometric analysis of the highly complex research discipline Geography. In order to identify the most popular and most cited publication channels, to reveal publication strategies, and to analyse the discipline's coverage within publications, the three main data sources for citation analyses, namely Web of Science, Scopus and Google Scholar, have been utilized. This study is based on publication data collected for four individual evaluation exercises performed at the University of Vienna and related to four different subfields: Geoecology, Social and Economic Geography, Demography and Population Geography, and Economic Geography. The results show very heterogeneous and individual publication strategies, even in the same research fields. Monographs, journal articles and book chapters are the most cited document types. Differences between research fields more related to the natural sciences than to the social sciences are clearly visible, but less considerable when taking into account the higher number of co-authors. General publication strategies seem to be established for both natural science and social sciences, however, with significant differences. While in natural science mainly publications in international peer-reviewed scientific journals matter, the focus in social sciences is rather on book chapters, reports and monographs. Although an "iceberg citation model" is suggested, citation analyses for monographs, book chapters and reports should be conducted separately and should include complementary data sources, such as Google Scholar, in order to enhance the coverage and to improve the quality of the visibility and impact analyses. This is particularly important for social sciences related research within Geography.

  8. Research on the extraction algorithm for a moving target in a dynamic scene based on Markov random fields (MRF)%基于MRF的动态场景中运动目标提取方法研究

    Institute of Scientific and Technical Information of China (English)

    王兴梅; 印桂生; 门志国; 仇晨光

    2011-01-01

    为在动态场景中准确完成运动目标的提取,提出一种新的基于MRF的运动目标提取方法,即提出在双尺度二阶邻域各向同性的MRF模型中,利用最小二乘法对初始分割结果进行MRF初始参数的自动求取,通过ICM算法实现最大后验概率的估计问题,获得MRF检测结果.采用形态学中的闭运算进行区域填充处理,根据二值化图像水平和垂直投影的顶点坐标实现运动目标区域的准确提取.对标准图像序列Coastguard和实际拍摄的动态场景图像序列的实验分析表明,提出的方法具有较高的精度和适应性,能够有效地完成运动目标的准确提取.%In order to extract a moving target precisely in the dynamic scene, a novel moving target extraction algo-rithm based on Markov random fields (MRF) was proposed. The initial MRF parameters, composed of an isotropic clique of a double scale neighborhood MRF model, were automatically computed by the least square method according to the initial segmentation result. In order to obtain the MRF detection result, the iterated conditional mode ( ICM) algorithm was used to estimate the maximum a posteriori ( MAP) . The holes and discontinuous regions were filled by closing operation of mathematical morphology. Finally, the moving target was extracted accurately according to the coordinates of the horizontal and perpendicular projection vertexes of a binary image. The experiments of the Coastguard standard image sequence along with a practical one with a dynamic scene demonstrate that the proposed algorithm is highly accurate, adaptive, and effective.

  9. Design Guidance for Computer-Based Procedures for Field Workers

    Energy Technology Data Exchange (ETDEWEB)

    Oxstrand, Johanna [Idaho National Lab. (INL), Idaho Falls, ID (United States); Le Blanc, Katya [Idaho National Lab. (INL), Idaho Falls, ID (United States); Bly, Aaron [Idaho National Lab. (INL), Idaho Falls, ID (United States)

    2016-09-01

    Nearly all activities that involve human interaction with nuclear power plant systems are guided by procedures, instructions, or checklists. Paper-based procedures (PBPs) currently used by most utilities have a demonstrated history of ensuring safety; however, improving procedure use could yield significant savings in increased efficiency, as well as improved safety through human performance gains. The nuclear industry is constantly trying to find ways to decrease human error rates, especially human error rates associated with procedure use. As a step toward the goal of improving field workers’ procedure use and adherence and hence improve human performance and overall system reliability, the U.S. Department of Energy Light Water Reactor Sustainability (LWRS) Program researchers, together with the nuclear industry, have been investigating the possibility and feasibility of replacing current paper-based procedures with computer-based procedures (CBPs). PBPs have ensured safe operation of plants for decades, but limitations in paper-based systems do not allow them to reach the full potential for procedures to prevent human errors. The environment in a nuclear power plant is constantly changing, depending on current plant status and operating mode. PBPs, which are static by nature, are being applied to a constantly changing context. This constraint often results in PBPs that are written in a manner that is intended to cover many potential operating scenarios. Hence, the procedure layout forces the operator to search through a large amount of irrelevant information to locate the pieces of information relevant for the task and situation at hand, which has potential consequences of taking up valuable time when operators must be responding to the situation, and potentially leading operators down an incorrect response path. Other challenges related to use of PBPs are management of multiple procedures, place-keeping, finding the correct procedure for a task, and relying

  10. Estimating urban roadside emissions with an atmospheric dispersion model based on in-field measurements.

    Science.gov (United States)

    Pu, Yichao; Yang, Chao

    2014-09-01

    Urban vehicle emission models have been utilized to calculate pollutant concentrations at both microscopic and macroscopic levels based on vehicle emission rates which few researches have been able to validate. The objective of our research is to estimate urban roadside emissions and calibrate it with in-field measurement data. We calculated the vehicle emissions based on localized emission rates, and used an atmospheric dispersion model to estimate roadside emissions. A non-linear regression model was applied to calibrate the localized emission rates using in-field measurement data. With the calibrated emission rates, emissions on urban roadside can be estimated with a high accuracy.

  11. The scholarly impact of doctoral research conducted in the field of ...

    African Journals Online (AJOL)

    11819898

    research in South Africa; mapping of fields of education scholarship; quality of doctoral education. Introduction ..... (2013:137) states that in continental Europe there ...... public resources invested in these research efforts. .... Relations Council.

  12. Research Based Science Education: An Exemplary Program for Broader Impacts

    Science.gov (United States)

    Walker, C. E.; Pompea, S. M.

    2016-12-01

    Broader impacts are most effective when standing on the shoulders of successful programs. The Research Based Science Education (RBSE) program was such a successful program and played a major role in activating effective opportunities beyond the scope of its program. NSF funded the National Optical Astronomy Observatory (NOAO) to oversee the project from 1996-2008. RBSE provided primarily high school teachers with on-site astronomy research experiences and their students with astronomy research projects that their teachers could explain with confidence. The goal of most student research projects is to inspire and motivate students to go into STEM fields. The authors of the original NSF proposal felt that for students to do research in the classroom, a foundational research experience for teachers must first be provided. The key components of the program consisted of 16 teachers/year on average; a 15-week distance learning course covering astronomy content, research, mentoring and leadership skills; a subsequent 10-day summer workshop with half the time on Kitt Peak on research-class telescopes; results presented on the 9th day; research brought back to the classroom; more on-site observing opportunities for students and teachers; data placed on-line to reach a wider audience; opportunities to submit research articles to the project's refereed journal; and travel for teachers (and the 3 teachers they each mentored) to a professional meeting. In 2004, leveraging on the well-established RBSE program, the NOAO/NASA Spitzer Space Telescope Research began. Between 2005 and 2008, metrics included 32 teachers (mostly from RBSE), 10 scientists, 15 Spitzer Director Discretionary proposals, 31 AAS presentations and many Intel ISEF winners. Under new funding in 2009, the NASA/IPAC Teacher Archive Research Program was born with similar goals and thankfully still runs today. Broader impacts, lessons learned and ideas for future projects will be discussed in this presentation.

  13. A novel paediatric game-based visual-fields assessor.

    Science.gov (United States)

    Aslam, Tariq M; Rahman, Waheeda; Henson, David; Khaw, Peng T

    2011-07-01

    To determine the feasibility of using a computer game to measure visual fields in children. The authors describe the development and assessment of a novel computer-game apparatus to measure visual fields in children. It is based upon a computer game visible on a monitor, housed in an interactive model-castle structure. The authors conducted a total of 25 field tests with the final apparatus, in 25 eyes of 19 children, aged 4-14 years. On two occasions children failed to complete the exam, owing to hardware and software defects that were subsequently rectified. For the 23 completed fields, the median time for completion of the full test was 4.5 min. 16 out of 18 clinically normal patients showed normal fields; the only failures were in two 4-year-old children who still managed to complete fields, but with generalised reduced responses that were deemed abnormal by our predetermined criteria. For the five eyes with expected glaucomatous loss, all five visual fields measured were completed and showed abnormal fields consistent with their medical condition. Positive feedback was given from all children about their testing experience. It is feasible to develop a computer-game-based system to measure fields in children in a non-invasive, affordable and entertaining way.

  14. Field Research: Learning through the Process of Observation

    Science.gov (United States)

    Hartlep, Nicholas Daniel

    2009-01-01

    This paper reports on the process of a participant observation. Its focus is its process, not on what was observed. This report provides the following: (1) an overview of this observation, (2) the purpose of this observation, (3) the site and situation of this observation, (4) two samples of reflective field notes from this observation, and (5) an…

  15. Anisotropy in wavelet-based phase field models

    KAUST Repository

    Korzec, Maciek

    2016-04-01

    When describing the anisotropic evolution of microstructures in solids using phase-field models, the anisotropy of the crystalline phases is usually introduced into the interfacial energy by directional dependencies of the gradient energy coefficients. We consider an alternative approach based on a wavelet analogue of the Laplace operator that is intrinsically anisotropic and linear. The paper focuses on the classical coupled temperature/Ginzburg--Landau type phase-field model for dendritic growth. For the model based on the wavelet analogue, existence, uniqueness and continuous dependence on initial data are proved for weak solutions. Numerical studies of the wavelet based phase-field model show dendritic growth similar to the results obtained for classical phase-field models.

  16. The near field acoustic holography technique for cyclostationary sound field and its experimental research

    Institute of Scientific and Technical Information of China (English)

    WAN Quan; JIANG Weikang

    2005-01-01

    One near field acoustic holography (NAH) technique is proposed for analyzing cyclostationary sound field. The signal of this kind of sound field has very serious modulation phenomenon generally, in spectrum of which obvious sidebands exist. It is difficult for the traditional NAH to possess demodulation function, so virtual power of sidebands exists in its hologram. Replacing the Fourier's transform with the second-order cyclic statistics, the proposed NAH technique uses the cyclic spectrum density (CSD) function as reconstructed physical quantity, instead of the spectrum or power spectrum density of sound pressure signal.The CSD function can demodulate cyclostationary signals, which makes no virtual power of sidebands in its hologram. The results of simulation and experiment show that the proposed NAH can extract more information about cyclostationary sound field than traditional NAH, by which sound field can be known more clearly.

  17. Distributed scientific communication in the European information society: Some cases of "Mode 2" fields of research

    CERN Document Server

    Heimeriks, Gaston; Besselaar, Peter Van den

    2010-01-01

    Can self-organization of scientific communication be specified by using literature-based indicators? In this study, we explore this question by applying entropy measures to typical "Mode-2" fields of knowledge production. We hypothesized these scientific systems to be developing from a self-organization of the interaction between cognitive and institutional levels: European subsidized research programs aim at creating an institutional network, while a cognitive reorganization is continuously ongoing at the scientific field level. The results indicate that the European system develops towards a stable level of distribution of cited references and title-words among the European member states. We suggested that this distribution could be a property of the emerging European system. In order to measure to degree of specialization with respect to the respective distributions of countries, cited references and title words, the mutual information among the three frequency distributions was calculated. The so-called t...

  18. Research of Camera Calibration Based on DSP

    Directory of Open Access Journals (Sweden)

    Zheng Zhang

    2013-09-01

    Full Text Available To take advantage of the high-efficiency and stability of DSP in the data processing and the functions of OpenCV library, this study brought forward a scheme that camera calibration in DSP embedded system calibration. An arithmetic of camera calibration based on OpenCV is designed by analyzing the camera model and lens distortion. The transplantation of EMCV to DSP is completed and the arithmetic of camera calibration is migrated and optimized based on the CCS development environment and the DSP/BIOS system. On the premise of realizing calibration function, this arithmetic improves the efficiency of program execution and the precision of calibration and lays the foundation for further research of the visual location based on DSP embedded system.

  19. Toward Theory-Based Research in Political Communication.

    Science.gov (United States)

    Simon, Adam F.; Iyengar, Shanto

    1996-01-01

    Praises the theoretical and methodological potential of the field of political communication. Calls for greater interaction and cross fertilization among the fields of political science, sociology, economics, and psychology. Briefly discusses relevant research methodologies. (MJP)

  20. Research priorities in the field of HIV and AIDS in Iran

    Directory of Open Access Journals (Sweden)

    AliAkbar Haghdoost

    2012-01-01

    Full Text Available Background: HIV is a multidimensional problem. Therefore, prioritization of research topics in this field is a serious challenge. We decided to prioritize the major areas of research on HIV/AIDS in Iran. Materials ans Methods : In a brain-storming session with the main national and provincial stakeholders and experts from different relevant fields, the direct and indirect dimensions of HIV/AIDS and its related research issues were explored. Afterward, using the Delphi method, we sent questionnaires to 20 experts (13 respondents from different sectors. In this electronic based questioner, we requested experts to evaluate main topics and their subtopics. The ranges of scores were between 0 and 100. Results: The score of priorities of main themes were preventive activities (43.2, large scale planning (25.4, the estimation of the HIV/AIDS burden (20.9, and basic scientific research (10.5. The most important priority in each main theme was education particularly in high risk groups (52.5, developing the national strategy to address the epidemic (31.8, estimation of the incidence and prevalence among high-risk groups (59.5 and developing new preventive methods (66.7, respectively. Conclusions: The most important priorities of researches on HIV/AIDS were preventive activities and developing national strategy. As high risk groups are the most involved people in the epidemic, and they are also the most hard-to-reach sub-populations, a national well designated comprehensive strategy is essential. However, we believe with a very specific and directed scheme, special attention to research in basic sciences is necessary, at least in limited number of institutes.

  1. Computer Based Training: Field Deployable Trainer and Shared Virtual Reality

    Science.gov (United States)

    Mullen, Terence J.

    1997-01-01

    Astronaut training has traditionally been conducted at specific sites with specialized facilities. Because of its size and nature the training equipment is generally not portable. Efforts are now under way to develop training tools that can be taken to remote locations, including into orbit. Two of these efforts are the Field Deployable Trainer and Shared Virtual Reality projects. Field Deployable Trainer NASA has used the recent shuttle mission by astronaut Shannon Lucid to the Russian space station, Mir, as an opportunity to develop and test a prototype of an on-orbit computer training system. A laptop computer with a customized user interface, a set of specially prepared CD's, and video tapes were taken to the Mir by Ms. Lucid. Based upon the feedback following the launch of the Lucid flight, our team prepared materials for the next Mir visitor. Astronaut John Blaha will fly on NASA/MIR Long Duration Mission 3, set to launch in mid September. He will take with him a customized hard disk drive and a package of compact disks containing training videos, references and maps. The FDT team continues to explore and develop new and innovative ways to conduct offsite astronaut training using personal computers. Shared Virtual Reality Training NASA's Space Flight Training Division has been investigating the use of virtual reality environments for astronaut training. Recent efforts have focused on activities requiring interaction by two or more people, called shared VR. Dr. Bowen Loftin, from the University of Houston, directs a virtual reality laboratory that conducts much of the NASA sponsored research. I worked on a project involving the development of a virtual environment that can be used to train astronauts and others to operate a science unit called a Biological Technology Facility (BTF). Facilities like this will be used to house and control microgravity experiments on the space station. It is hoped that astronauts and instructors will ultimately be able to share

  2. From scientifically based research to evidence based learning

    Directory of Open Access Journals (Sweden)

    Rosa Cera

    2016-02-01

    Full Text Available This essay is a reflection on the peculiarities of the scientifically based research and on the distinctive elements of the EBL (evidence based learning, methodology used in the study on the “Relationship between Metacognition, Self-efficacy and Self-regulation in Learning”. The EBL method, based on the standardization of data, explains how the students’ learning experience can be considered as a set of “data” and can be used to explain how and when the research results can be considered generalizable and transferable to other learning situations. The reflections present in this study have also allowed us to illustrate the impact that its results have had on the micro and macro level of reality. They helped to fill in the gaps concerning the learning/teaching processes, contributed to the enrichment of the scientific literature on this subject and allowed to establish standards through rigorous techniques such as systematic reviews and meta-analysis.

  3. Deep Vadose Zone-Applied Field Research Initiative Fiscal Year 2011 Annual Report

    Energy Technology Data Exchange (ETDEWEB)

    Wellman, Dawn M.; Johnson, Timothy C.; Smith, Ronald M.; Truex, Michael J.; Matthews, Hope E.

    2011-10-01

    This annual report describes the background of the Deep Vadose Zone-Applied Field Research Initiative, and some of the programmatic approaches and transformational technologies in groundwater and deep vadose zone remediation developed during fiscal year 2011. The Department of Energy (DOE) Office of Technology Innovation and Development's (OTID) mission is to transform science into viable solutions for environmental cleanup. In 2010, OTID developed the Impact Plan, Science and Technology to Reduce the Life Cycle Cost of Closure to outline the benefits of research and development of the lifecycle cost of cleanup across the DOE complex. This plan outlines OTID's ability to reduce by $50 billion, the $200 billion life-cycle cost in waste processing, groundwater and soil, nuclear materials, and deactivation and decommissioning. The projected life-cycle costs and return on investment are based on actual savings realized from technology innovation, development, and insertion into remedial strategies and schedules at the Fernald, Mound, and Ashtabula sites. To achieve our goals, OTID developed Applied Field Research Initiatives to facilitate and accelerate collaborative development and implementation of new tools and approaches that reduce risk, cost and time for site closure. The primary mission of the Deep Vadose Zone-Applied Field Research Initiative (DVZ-AFRI) is to protect our nation's water resources, keeping them clean and safe for future generations. The DVZ-AFRI was established for the DOE to develop effective, science-based solutions for remediating, characterizing, monitoring, and predicting the behavior and fate of deep vadose zone contamination. Subsurface contaminants include radionuclides, metals, organics, and liquid waste that originated from various sources, including legacy waste from the nation's nuclear weapons complexes. The DVZ-AFRI project team is translating strategy into action by working to solve these complex challenges in a

  4. Normal Bases and Their Dual-Bases over Finite Fields

    Institute of Scientific and Technical Information of China (English)

    Qun Ying LIAO; Qi SUN

    2006-01-01

    In this paper, we prove the following results: 1) A normal basis N over a finite field is equivalent to its dual basis if and only if the multiplication table of N is symmetric; 2) The normal basis N is self-dual if and only if its multiplication table is symmetric and Tr(α2) = 1, where α generates N; 3) An optimal normal basis N is self-dual if and only if AT is a type-Ⅰ optimal normal basis with q = n = 2 or N is a type-Ⅱ optimal normal basis.

  5. Updated Hungarian Gravity Field Solution Based on Fifth Generation GOCE Gravity Field Models

    Science.gov (United States)

    Toth, Gyula; Foldvary, Lorant

    2015-03-01

    With the completion of the ESA's GOCE satellite's mission fifth generation gravity field models are available from the ESA's GOCE High Processing Facility. Our contribution is an updated gravity field solution for Hungary using the latest DIR R05 GOCE gravity field model. The solution methodology is least squares gravity field parameter estimation using Spherical Radial Base Functions (SRBF). Regional datasets include deflections of the vertical (DOV), gravity anomalies and quasigeoid heights by GPS/levelling. The GOCE DIR R05 model has been combined with the EGM20008 model and has been evaluated in comparison with the EGM2008 and EIGEN-6C3stat models to assess the performance of our regional gravity field solution.

  6. Identifying Themes for Research-Based Development of Pedagogy and Guidance in Higher Education

    Science.gov (United States)

    Jääskelä, Päivikki; Nissilä, Pia

    2015-01-01

    The high value accorded to the research-based development of education in higher education communities means that researchers in the field have an important role in determining the foci of such efforts. However, it is important to ask whether higher education research is providing answers that satisfy practical educational needs. In this study,…

  7. Research on Numerical Simulation for Flow Field in a Jigger

    Institute of Scientific and Technical Information of China (English)

    ZENG Ming; XU Zhi-qiang; XIE Hua; ZHANG Rong-zeng

    2003-01-01

    Jigger is the main equipment in coal processing industry in China, which is developed towards large-scale device. By using the homemade device LTX-35 jigger as a model employing mesh division with non-orthogonal mesh for different kinds of through-flow passage, and completing the numerical simulation with the computational fluid dynamics (CDF) software-PHOENICS, the velocity distribution in different flow fields resulting from guide plates of varied structures are obtained. The results from the simulation show that 1 ) the degree of velocity uniformity of the flow field can be improved if a flat guide plate is replaced by a curved one in the jigger; 2) the best result can be achieved by using a semicircular guide plate.

  8. Methodological bases of innovative training of specialists in nanotechnology field

    OpenAIRE

    FIGOVSKY Oleg Lvovich; SHAMELKHANOVA Nelya A.; AIDAROVA Saule B.

    2016-01-01

    The performance of innovative training system aimed at highly intellectual specialists in the area of nanotechnologies for Kazakhstan’s economy demands establishment and development of nanotechnological market in the country, teaching of innovative engineering combined with consistent research, integration of trained specialists with latest technologies and sciences at the international level. Methodological aspects of training competitive specialists for nanotechnological field are spe...

  9. Perspectives and controversies in the field of stem cell research.

    Science.gov (United States)

    Romano, Gaetano

    2006-09-01

    The fourth annual meeting of the International Society for Stem Cell Research focused on a number of pressing issues, including: (I) the need to better characterize the biology of stem cells; (II) the need to exploit and optimize the great therapeutic potential of stem cells in tissue regeneration; (III) ethical and safety considerations related to the use of human embryonic stem cells; (IV) the contribution of adult stem cells to carcinogenesis; (V) the need to investigate the biology of cancer stem cells. The purpose of this report is to summarize the current status of stem cell research, as surmised by the proceedings of this meeting.

  10. Ultra-Sensitivity Glucose Sensor Based on Field Emitters

    Directory of Open Access Journals (Sweden)

    Song Yinglin

    2009-01-01

    Full Text Available Abstract A new glucose sensor based on field emitter of ZnO nanorod arrays (ZNA was fabricated. This new type of ZNA field emitter-based sensor shows high sensitivity with experimental limit of detection of 1 nM glucose solution and a detection range from 1 nM to 50 μM in air at room temperature, which is lower than that of glucose sensors based on surface plasmon resonance spectroscopy, fluorescence signal transmission, and electrochemical signal transduction. The new glucose sensor provides a key technique for promising consuming application in biological system for detecting low levels of glucose on single cells or bacterial cultures.

  11. The scaled-charge additive force field for amino acid based ionic liquids

    DEFF Research Database (Denmark)

    Fileti, E. E.; Chaban, V. V.

    2014-01-01

    Ionic liquids (ILs) constitute an emerging research field. New ILs involve more and more organic and inorganic ions. Amino acid based ILs (AAILs) represent a specific interest due to their evolutional connection to proteins. We report a new non-polarizable force field (FF) for the eight AAILs com...... the CHARMM36 FF with minor modifications. Compatibility between our parameters and CHARMM36 parameters is preserved. (C) 2014 Elsevier B.V. All rights reserved....

  12. The resolutions of the 24th IAU General Assembly and presedent astrometric research fields

    Science.gov (United States)

    Jin, Wenjing; Xia, Yifei; Han, Changhao

    2001-06-01

    The action of IAU resolutions for the development of astronomy are described and the three resolutions, which were passed at the 24th IAU General Assembly, are briefly introduced. The precedent astrometric research fields during the period of 2000 - 2003 are evaluated and the prior research fields of fundamental astrometry in China are suggested.

  13. [Medical and biologic research of electromagnetic fields in radiofrequencies range. Results and prospects].

    Science.gov (United States)

    Kaliada, T V; Vishnevskiĭ, A M; Gorodetskiĭ, B N; Plekhanov, V P; Kuznetsov, A V

    2014-01-01

    The authors present research findings on the problem of technology-related electromagnetic fields as an occupational risk factor of workers health disturbances, and on the issue of prevention measures development against this adverse physical factor effects. Prospects for further research development in the field of electromagnetic safety are discussed.

  14. The Microgravity Research Experiments (MICREX) Data Base

    Science.gov (United States)

    Winter, C. A.; Jones, J. C.

    1996-01-01

    An electronic data base identifying over 800 fluids and materials processing experiments performed in a low-gravity environment has been created at NASA Marshall Space Flight Center. The compilation, called MICREX (MICrogravity Research Experiments) was designed to document all such experimental efforts performed (1) on U.S. manned space vehicles, (2) on payloads deployed from U.S. manned space vehicles, and (3) on all domestic and international sounding rockets (excluding those of China and the former U.S.S.R.). Data available on most experiments include (1) principal and co-investigator (2) low-gravity mission, (3) processing facility, (4) experimental objectives and results, (5) identifying key words, (6) sample materials, (7) applications of the processed materials/research area, (8) experiment descriptive publications, and (9) contacts for more information concerning the experiment. This technical memorandum (1) summarizes the historical interest in reduced-gravity fluid dynamics, (2) describes the importance of a low-gravity fluids and materials processing data base, (4) describes thE MICREX data base format and computational World Wide Web access procedures, and (5) documents (in hard-copy form) the descriptions of the first 600 fluids and materials processing experiments entered into MICREX.

  15. A Preparadigmatic Field: A Review of Research on School Vandalism.

    Science.gov (United States)

    Zweig, April; Ducey, Michael H.

    One of 52 theoretical papers on school crime and its relation to poverty, this chapter reviews the various approaches used in the study of school vandalism and attempts to define what is needed now. The main contribution of early research on vandalism is to point out an intellectual dead end. Conventional demographic approaches to the problem, by…

  16. Research in corporate communication: An overview of an emerging field

    NARCIS (Netherlands)

    C.B.M. van Riel (Cees)

    1997-01-01

    textabstractThis commentary is intended as an amendment to Argenti's (1996) viewpoint, published in Volume 10, Issue 1, of Management Communication Quarterly. Van Riel provides an overview of research in corporate communication, focusing on achievements found in the international academic literature

  17. Integrating Research Proposals into a Field Seminar: Feedback from Students

    Science.gov (United States)

    Kvarfordt, Connie L.; Carter, Irene; Park, Wansoo; Yun, Sung Hyun

    2014-01-01

    Teaching research to social work students continues to be the topic of an ongoing dialog within the profession. The literature suggests that some form of a "real-world" or "hands-on" learning opportunity has many benefits for teaching a subject that students often are reluctant to engage in. Using online survey methods,…

  18. Research in corporate communication: An overview of an emerging field

    NARCIS (Netherlands)

    C.B.M. van Riel (Cees)

    1997-01-01

    textabstractThis commentary is intended as an amendment to Argenti's (1996) viewpoint, published in Volume 10, Issue 1, of Management Communication Quarterly. Van Riel provides an overview of research in corporate communication, focusing on achievements found in the international academic literature

  19. Labouring in the Knowledge Fields: Researching Knowledge in Globalising Workspaces

    Science.gov (United States)

    Farrell, Lesley

    2006-01-01

    While research on globalisation can hardly be said to have ignored the phenomenon of the global corporation or the globally distributed supply chain, the focus has overwhelmingly been on "globalization from above"--on corporate structures and on the movement of global capital in global "knowledge economies". My focus in this…

  20. Higher Education Research Community in Taiwan: An Emerging Field

    Science.gov (United States)

    Chan, Sheng-Ju; Chan, Ying

    2015-01-01

    This paper aims to explore the evolution and characteristics of the higher education research community in Taiwan. In echoing the development of the East Asian region, Taiwan has made substantial progress during the past two decades. The massification of higher education itself has played a major role in promoting the academic differentiation or…

  1. Information Sharing in the Field of Design Research

    Science.gov (United States)

    Pilerot, Ola

    2015-01-01

    Introduction: This paper reports on an extensive research project which aimed at exploring information sharing activities in a scholarly context. The paper presents and synthesises findings from a literature review and three qualitative case studies. The empirical setting is a geographically distributed Nordic network of design scholars. Method:…

  2. Field Dependence Research: A Historical Analysis of a Psychological Construct.

    Science.gov (United States)

    Haaken, Janice

    1988-01-01

    Cultural and political biases in social science research contribute to bias in study methodology, as well as interpretations and conclusions. The work of Herman Witkin and Solomon Asch are discussed and used to demonstrate the effects and limitations of the environment versus ego on male and female perceptions. (AO)

  3. Magnet Science and Technology for Basic Research at the High Field Laboratory for Superconducting Materials

    Institute of Scientific and Technical Information of China (English)

    渡辺和雄

    2007-01-01

    Since the first practical cryocooled superconducting magnet using a GM-cryocooler and high temperature superconducting current leads has been demonstrated successfully at the High Field Laboratory for Superconducting Materials (HFLSM), various kinds of cryocooled superconducting magnets in fields up to 15 T have been used to provide access for new research areas in fields of magneto-science. Recently, the HFLSM has succeeded in demonstrating a cryocooed 18 T high temperature superconducting magnet and a high field cryocooled 27.5 T hybrid magnet. Cryocooled magnet technology and basic research using high field magnets at the HFLSM are introduced.

  4. The Application of Intensive Longitudinal Methods to Investigate Change: Stimulating the Field of Applied Family Research.

    Science.gov (United States)

    Bamberger, Katharine T

    2016-03-01

    The use of intensive longitudinal methods (ILM)-rapid in situ assessment at micro timescales-can be overlaid on RCTs and other study designs in applied family research. Particularly, when done as part of a multiple timescale design-in bursts over macro timescales-ILM can advance the study of the mechanisms and effects of family interventions and processes of family change. ILM confers measurement benefits in accurately assessing momentary and variable experiences and captures fine-grained dynamic pictures of time-ordered processes. Thus, ILM allows opportunities to investigate new research questions about intervention effects on within-subject (i.e., within-person, within-family) variability (i.e., dynamic constructs) and about the time-ordered change process that interventions induce in families and family members beginning with the first intervention session. This paper discusses the need and rationale for applying ILM to family intervention evaluation, new research questions that can be addressed with ILM, example research using ILM in the related fields of basic family research and the evaluation of individual-based interventions. Finally, the paper touches on practical challenges and considerations associated with ILM and points readers to resources for the application of ILM.

  5. [Productivity and academic assessment in the Brazilian public health field: challenges for Human and Social Sciences research].

    Science.gov (United States)

    Bosi, Maria Lúcia Magalhães

    2012-12-01

    This article analyzes some challenges for knowledge output in the human and social sciences in the public health field, under the current academic assessment model in Brazil. The article focuses on the qualitative research approach in human and social sciences, analyzing its status in comparison to the other traditions vying for hegemony in the public health field, conjugating the dialogue with the literature, especially the propositions pertaining to the social fields present in the work of Pierre Bourdieu, with elements concerning the field's dynamics, including some empirical data. Challenges identified in the article include hurdles to interdisciplinary dialogue and equity in the production of knowledge, based on recognition of the founding place of human and social sciences in the public health field. The article discusses strategies to reshape the current correlation of forces among centers of knowledge in public health, especially those capable of impacting the committees and agendas that define the accumulation of symbolic and economic capital in the field.

  6. Magnetic Field Measurements Based on Terfenol Coated Photonic Crystal Fibers

    Directory of Open Access Journals (Sweden)

    Carla C. Kato

    2011-11-01

    Full Text Available A magnetic field sensor based on the integration of a high birefringence photonic crystal fiber and a composite material made of Terfenol particles and an epoxy resin is proposed. An in-fiber modal interferometer is assembled by evenly exciting both eigenemodes of the HiBi fiber. Changes in the cavity length as well as the effective refractive index are induced by exposing the sensor head to magnetic fields. The magnetic field sensor has a sensitivity of 0.006 (nm/mT over a range from 0 to 300 mT with a resolution about ±1 mT. A fiber Bragg grating magnetic field sensor is also fabricated and employed to characterize the response of Terfenol composite to the magnetic field.

  7. Magnetic field measurements based on Terfenol coated photonic crystal fibers.

    Science.gov (United States)

    Quintero, Sully M M; Martelli, Cicero; Braga, Arthur M B; Valente, Luiz C G; Kato, Carla C

    2011-01-01

    A magnetic field sensor based on the integration of a high birefringence photonic crystal fiber and a composite material made of Terfenol particles and an epoxy resin is proposed. An in-fiber modal interferometer is assembled by evenly exciting both eigenemodes of the HiBi fiber. Changes in the cavity length as well as the effective refractive index are induced by exposing the sensor head to magnetic fields. The magnetic field sensor has a sensitivity of 0.006 (nm/mT) over a range from 0 to 300 mT with a resolution about ±1 mT. A fiber Bragg grating magnetic field sensor is also fabricated and employed to characterize the response of Terfenol composite to the magnetic field.

  8. A review of research in the field of nanorobotics.

    Energy Technology Data Exchange (ETDEWEB)

    Sierra, Dannelle P.; Weir, Nathan A.; Jones, James Frank

    2005-10-01

    This report highlights the findings of an extensive review of the literature in the area of nanorobotics. The main goal of this midyear LDRD effort is to survey and identify accomplishments and advancements that have been made in this relatively new and emerging field. As a result, it may be determined what routes in the area of nanorobotics are scientifically plausible and technically useful so that the Intelligent Systems and Robotics Center can position itself to play a role in the future development of nanotechnology.

  9. Research of Multi Detectors of Neutron Spectrum in Mix Fields

    Institute of Scientific and Technical Information of China (English)

    LI; Wei; CHEN; Jun; WANG; Zhi-qiang; LI; Chun-juan; LIU; Yi-na; LUO; Hai-long; ZHANG; Wei-hua

    2013-01-01

    This neutron spectrometer can be used to measure neutron spectrum and neutron equivalent dosimetry.The range of neutron spectrum is thermal-20 MeV,and the range of neutron equivalent dosimetry is 1μSv·h-1-4 mSv·h-1.The sensor head of the neutron spectrum of multi detectors in mix fields houses five gas-filled sensors and a photo-scintillator column.There are two boron tri-fluoride(BF3)and three hydrogen

  10. Robotic weeding of a maize field based on navigation data of the tractor that performed the seeding (Preprint)

    NARCIS (Netherlands)

    Bakker, T.; Asselt, van C.J.; Bontsema, J.; Henten, van E.J.

    2010-01-01

    This research presents robotic weeding of a maize field based on navigation data of the tractor that performed the seeding. The availability of tractors equipped with RTK-DGPS based automatic guidance potentially enables robots to perform subsequent tasks in the same field. In an experiment a tracto

  11. Organic Field-effect Transistors Based on Tetrathiafulvalene Derivatives

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    1 Restults Tetrathiafulvalene (TTF) and its derivatives have been extensively investigated in the field of organic conductors and superconductors since 1973. Recently, their application in organic field-effect transistors (OFETs) has attracted considerable attention. So far, on the one hand, the fabrication techniques of the TTF-based FETs have been primarily limited to high vacuum evaporation, which is a relatively expensive process. On the other hand, low FET performances, such as the low on/off ratio...

  12. Finite Field Arithmetic Architecture Based on Cellular Array

    Directory of Open Access Journals (Sweden)

    Kee-Won Kim

    2015-05-01

    Full Text Available Recently, various finite field arithmetic structures are introduced for VLSI circuit implementation on cryptosystems and error correcting codes. In this study, we present an efficient finite field arithmetic architecture based on cellular semi-systolic array for Montgomery multiplication by choosing a proper Montgomery factor which is highly suitable for the design on parallel structures. Therefore, our architecture has reduced a time complexity by 50% compared to typical architecture.

  13. PROBLEMATIKA PENERAPAN METODE FIELD RESEARCH UNTUK PENELITIAN ARSITEKTUR VERNAKULAR DI INDONESIA

    Directory of Open Access Journals (Sweden)

    Salmon Priaji Martana

    2006-01-01

    Full Text Available Field research method was introduced into the academic world on the second half of 19th century. This method commonly used by anthropologist. According to Bronislaw Malinoski -field research pioneer in 1920s- social researcher must interact directly and live together with the indigene to study their tradition, belief, as well as their social process. As the time passing by, field research method also used by another branch of science, including architecture. The implementation of field research method for vernacular architecture research is believed as an appropriate measure, for its ability to portrait the aspects of artifacts, idea and activity within the community where the architecture takes place. However, one has to be aware regarding several problems arise when using this method in the vernacular architecture research. Alongside the fact that architectural research is still a rather new issue, there are quite a few limitations around architect and architecture researcher which made them unable to equalize the anthropologist yet. This paper elucidates the characteristic of field research and its implementation on vernacular architecture research in Indonesia perspective. Abstract in Bahasa Indonesia : Metode field research diperkenalkan di kancah akademik pada paruh kedua abad 19. Pada umumnya metode ini diterapkan oleh peneliti antropologi. Menurut Bronislaw Malinoski -salah seorang pelopornya di tahun 1920an- peneliti sosial harus berinteraksi langsung dan hidup bersama masyarakat pribumi, mempelajari adat istiadat, kepercayaan serta proses sosialnya. Seiring berjalannya waktu, metode field research mulai digunakan pula oleh disiplin ilmu lain, di antaranya arsitektur. Penerapan metode field research untuk penelitian arsitektur vernakular merupakan langkah yang tepat, dikarenakan kemampuannya untuk sekaligus memetakan aspek artifak, tata nilai dan aktivitas dari masyarakat di mana arsitektur tersebut tumbuh dan berkembang. Namun demikian

  14. Development Tendency in Main Fields of Reading Researches

    Institute of Scientific and Technical Information of China (English)

    石晶

    2011-01-01

    The last few decades have witnessed the publication of a considerable amount of empirical evidence supporting what Krashen has called " the power of reading" ( Krashen, 1993 ). There is a widespread approval that reading itself leads to better reading, better vocabulary, better writing, and better control of grammar in both first and second languages. In this article, the following research areas will be discussed, which can be mainly divided into the following 20 categories.

  15. Improved nowcasting of precipitation based on convective analysis fields

    Directory of Open Access Journals (Sweden)

    T. Haiden

    2007-04-01

    Full Text Available The high-resolution analysis and nowcasting system INCA (Integrated Nowcasting through Comprehensive Analysis developed at the Austrian national weather service provides three-dimensional fields of temperature, humidity, and wind on an hourly basis, and two-dimensional fields of precipitation rate in 15 min intervals. The system operates on a horizontal resolution of 1 km and a vertical resolution of 100–200 m. It combines surface station data, remote sensing data (radar, satellite, forecast fields of the numerical weather prediction model ALADIN, and high-resolution topographic data. An important application of the INCA system is nowcasting of convective precipitation. Based on fine-scale temperature, humidity, and wind analyses a number of convective analysis fields are routinely generated. These fields include convective boundary layer (CBL flow convergence and specific humidity, lifted condensation level (LCL, convective available potential energy (CAPE, convective inhibition (CIN, and various convective stability indices. Based on the verification of areal precipitation nowcasts it is shown that the pure translational forecast of convective cells can be improved by using a decision algorithm which is based on a subset of the above fields, combined with satellite products.

  16. Product-services as a research field: past, present and future. Reflections from a decade of research

    NARCIS (Netherlands)

    Tukker, A.; Tischner, U.

    2006-01-01

    In the last decade many researchers, institutes and programs in the EU paid attention to product-service systems (PSS). Given this massive effort, it is time to take stock. Is PSS research a theoretical field in its own right? Is the PSS concept indeed the road to the Factor 10 world? Is it the road

  17. 试验场空中信号泄密隐患及基于安全代理基站的解决方案研究%Research on Hidden Danger of Testing Field Wireless Signal Divulge Secret and Solution Based on Security Agency Station

    Institute of Scientific and Technical Information of China (English)

    高小玲; 刘力天; 闫冰

    2013-01-01

    Wireless signal divulge secret is one of most serious hidden danger of mobile communi-cation .Based on the analysis of testing field's mobile communication status and researching the tech-nology of security agency station ,through simulating and analyzing the hidden danger of wireless sig-nal divulge secret of testing field's mobile communication , this paper puts forward the solution scheme w hich is based on security agency station ,and this scheme can effectively solve the problem of the hidden danger of wireless signal divulge secret of testing field's mobile communication .%空中信号泄密是移动通信最大的安全隐患之一,在分析试验场移动通信现状和研究安全代理基站技术的基础上,通过仿真分析试验场移动通信空中信号的泄密隐患,提出基于安全代理基站的解决方案,该方案能够有效解决试验场移动通信的空中接口泄密隐患。

  18. Differential Regulatory Analysis Based on Coexpression Network in Cancer Research

    Directory of Open Access Journals (Sweden)

    Junyi Li

    2016-01-01

    Full Text Available With rapid development of high-throughput techniques and accumulation of big transcriptomic data, plenty of computational methods and algorithms such as differential analysis and network analysis have been proposed to explore genome-wide gene expression characteristics. These efforts are aiming to transform underlying genomic information into valuable knowledges in biological and medical research fields. Recently, tremendous integrative research methods are dedicated to interpret the development and progress of neoplastic diseases, whereas differential regulatory analysis (DRA based on gene coexpression network (GCN increasingly plays a robust complement to regular differential expression analysis in revealing regulatory functions of cancer related genes such as evading growth suppressors and resisting cell death. Differential regulatory analysis based on GCN is prospective and shows its essential role in discovering the system properties of carcinogenesis features. Here we briefly review the paradigm of differential regulatory analysis based on GCN. We also focus on the applications of differential regulatory analysis based on GCN in cancer research and point out that DRA is necessary and extraordinary to reveal underlying molecular mechanism in large-scale carcinogenesis studies.

  19. Teacher Leaders in Research Based Science Education

    Science.gov (United States)

    Rector, T. A.; Jacoby, S. H.; Lockwood, J. F.; McCarthy, D. W.

    2001-12-01

    NOAO facilities will be used in support of ``Teacher Leaders in Research Based Science Education" (TLRBSE), a new Teacher Retention and Renewal program that will be funded through the National Science Foundation's Directorate for Education and Human Resources. The goal of TLRBSE is to provide professional development for secondary teachers of mathematics and science in an effort to support novice teachers beginning their careers as well as to motivate and retain experienced teachers. Within the context of astronomy, TLRBSE will develop master teachers who will mentor a second tier of novice teachers in the exemplary method of research-based science education, a proven effective teaching method which models the process of inquiry and exploration used by scientists. Participants will be trained through a combination of in-residence workshops at Kitt Peak National Observatory and the National Solar Observatory, a distance-learning program during the academic year, interaction at professional meetings and mentor support from teacher leaders and professional astronomers. A total of 360 teachers will participate in the program over five years.

  20. The Research and Development of the External Magnetic Field Acting on Electro-Deposition Process

    OpenAIRE

    Wu Menghua; Jia Weiping

    2016-01-01

    The research and development status of the electro-deposition technology under the action of external magnetic field are introduced. The basic characteristics and applied manners of external magnetic field in electro-deposition process are summarized. The acting principle of external magnetic field, the effects of magnetic hydrodynamics (MHD) caused by the Lorentz force, and the acting of magnetic force on the metal ions and particles are described. The main actions of external magnetic field...

  1. Field Research Facility Data Integration Framework Data Management Plan: Survey Lines Dataset

    Science.gov (United States)

    2016-08-01

    clearinghouse tool using the Environmental Systems Research Institute (Esri) Geoportal technology . Once the XML metadata is loaded into the Metadata Manager ...ER D C/ CH L SR -1 6- 4 Coastal Ocean Data Systems Program Field Research Facility Data Integration Framework Data Management Plan...Systems Program ERDC/CHL SR-16-4 August 2016 Field Research Facility Data Integration Framework Data Management Plan Survey Lines Dataset Michael F

  2. Functional Competency Development Model for Academic Personnel Based on International Professional Qualification Standards in Computing Field

    Science.gov (United States)

    Tumthong, Suwut; Piriyasurawong, Pullop; Jeerangsuwan, Namon

    2016-01-01

    This research proposes a functional competency development model for academic personnel based on international professional qualification standards in computing field and examines the appropriateness of the model. Specifically, the model consists of three key components which are: 1) functional competency development model, 2) blended training…

  3. The Ins & Outs of Developing a Field-Based Science Project: Learning by Lassoing Lizards

    Science.gov (United States)

    Matthews, Catherine E.; Huffling, Lacey D.; Benavides, Aerin

    2014-01-01

    We describe a field-based lizard project we did with high school students as a part of our summer Herpetological Research Experiences. We describe data collection on lizards captured, identified, and marked as a part of our mark-recapture study. We also describe other lizard projects that are ongoing in the United States and provide resources for…

  4. Research fronts analysis : A bibliometric to identify emerging fields of research

    Science.gov (United States)

    Miwa, Sayaka; Ando, Satoko

    Research fronts analysis identifies emerging areas of research through observing co-clustering in highly-cited papers. This article introduces the concept of research fronts analysis, explains its methodology and provides case examples. It also demonstrates developing research fronts in Japan by looking at the past winners of Thomson Reuters Research Fronts Awards. Research front analysis is currently being used by the Japanese government to determine new trends in science and technology. Information professionals can also utilize this bibliometric as a research evaluation tool.

  5. [Development of a massage device based on microcontroller in the field of alimentary tract].

    Science.gov (United States)

    Huang, Rong; Peng, Chenglin; He, Hongmei; Zhu, Jing

    2007-12-01

    In this artical is first reported a survey of the progress in research of MEMS technology. Then, the basic structure, features and the principles of a massage device based on microcontroller in the field of alimentary tract are introduced. Special emphasis is laid on the utilization of MSP430F123 microprocessor for producing a kind of period pulse to control the power of massage capsule. In general, the research and development of the massage device in the field of alimentary tract have active support and deep significance to therapy in the clinical and business settings as well as in the development of biomedical engineering and MEMS.

  6. Doing Interdisciplinary Mixed Methods Health Care Research: Working the Boundaries, Tensions, and Synergistic Potential of Team-Based Research.

    Science.gov (United States)

    Hesse-Biber, Sharlene

    2016-04-01

    Current trends in health care research point to a shift from disciplinary models to interdisciplinary team-based mixed methods inquiry designs. This keynote address discusses the problems and prospects of creating vibrant mixed methods health care interdisciplinary research teams that can harness their potential synergy that holds the promise of addressing complex health care issues. We examine the range of factors and issues these types of research teams need to consider to facilitate efficient interdisciplinary mixed methods team-based research. It is argued that concepts such as disciplinary comfort zones, a lack of attention to team dynamics, and low levels of reflexivity among interdisciplinary team members can inhibit the effectiveness of a research team. This keynote suggests a set of effective strategies to address the issues that emanate from the new field of research inquiry known as team science as well as lessons learned from tapping into research on organizational dynamics. © The Author(s) 2016.

  7. Efficient Simulation of Quantum States Based on Classical Fields Modulated with Pseudorandom Phase Sequences

    CERN Document Server

    Fu, Jian

    2010-01-01

    We demonstrate that a tensor product structure could be obtained by introducing pseudorandom phase sequences into classical fields with two orthogonal modes. Using classical fields modulated with pseudorandom phase sequences, we discuss efficient simulation of several typical quantum states, including product state, Bell states, GHZ state, and W state. By performing quadrature demodulation scheme, we could obtain the mode status matrix of the simulating classical fields, based on which we propose a sequence permutation mechanism to reconstruct the simulated quantum states. The research on classical simulation of quantum states is important, for it not only enables potential practical applications in quantum computation, but also provides useful insights into fundamental concepts of quantum mechanics.

  8. Contracts for field projects and supporting research on enhanced oil recovery. Progress review No. 89

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-04-01

    Summaries are presented for the DOE contracts related to supported research for thermal recovery of petroleum, geoscience technology, and field demonstrations in high-priority reservoir classes. Data included for each project are: title, contract number, principal investigator, research organization, beginning date, expected completion date, amount of award, objectives of the research, and summary of technical progress.

  9. Environmental Assessment for Selection and Operation of the Proposed Field Research Centers for the Natural and Accelerated Bioremediation Research (NABIR) Program

    Energy Technology Data Exchange (ETDEWEB)

    N/A

    2000-04-18

    biodegrade or biotransform hazardous organic contaminants to environmentally safe levels in soils, subsurface materials, water, sludges, and residues.. While bioremediation technology is promising, DOE managers and non-DOE scientists have recognized that the fundamental scientific information needed to develop effective bioremediation technologies for cleanup of the legacy waste sites is lacking in many cases. DOE believes that field-based research is needed to realize the full potential of bioremediation. The Department of Energy faces a unique set of challenges associated with cleaning up waste at its former weapons production and research sites. These sites contain complex mixtures of contaminants in the subsurface, including radioactive compounds. In many cases, the fundamental field-based scientific information needed to develop safe and effective remediation and cleanup technologies is lacking. DOE needs fundamental research on the use of microorganisms and their products to assist DOE in the decontamination and cleanup of its legacy waste sites. The existing NABIR program to-date has focused on fundamental scientific research in the laboratory. Because subsurface hydrologic and geologic conditions at contaminated DOE sites cannot easily be duplicated in a laboratory, however, the DOE needs a field component to permit existing and future laboratory research results to be field-tested on a small scale in a controlled outdoor setting. Such field-testing needs to be conducted under actual legacy waste field conditions representative of those that DOE is most in need of remediating. Ideally, these field conditions should be as representative as practicable of the types of subsurface contamination conditions that resulted from legacy wastes from the nuclear weapons program activities. They should also be representative of the types of hydrologic and geologic conditions that exist across the DOE complex.

  10. A cavitation model based on Eulerian stochastic fields

    Science.gov (United States)

    Magagnato, F.; Dumond, J.

    2013-12-01

    Non-linear phenomena can often be described using probability density functions (pdf) and pdf transport models. Traditionally the simulation of pdf transport requires Monte-Carlo codes based on Lagrangian "particles" or prescribed pdf assumptions including binning techniques. Recently, in the field of combustion, a novel formulation called the stochastic-field method solving pdf transport based on Eulerian fields has been proposed which eliminates the necessity to mix Eulerian and Lagrangian techniques or prescribed pdf assumptions. In the present work, for the first time the stochastic-field method is applied to multi-phase flow and in particular to cavitating flow. To validate the proposed stochastic-field cavitation model, two applications are considered. Firstly, sheet cavitation is simulated in a Venturi-type nozzle. The second application is an innovative fluidic diode which exhibits coolant flashing. Agreement with experimental results is obtained for both applications with a fixed set of model constants. The stochastic-field cavitation model captures the wide range of pdf shapes present at different locations.

  11. Field-based physiological testing of wheelchair athletes.

    Science.gov (United States)

    Goosey-Tolfrey, Victoria L; Leicht, Christof A

    2013-02-01

    The volume of literature on field-based physiological testing of wheelchair sports, such as basketball, rugby and tennis, is considerably smaller when compared with that available for individuals and team athletes in able-bodied (AB) sports. In analogy to the AB literature, it is recognized that performance in wheelchair sports not only relies on fitness, but also sport-specific skills, experience and technical proficiency. However, in contrast to AB sports, two major components contribute towards 'wheeled sports' performance, which are the athlete and the wheelchair. It is the interaction of these two that enable wheelchair propulsion and the sporting movements required within a given sport. Like any other athlete, participants of wheelchair sports are looking for efficient ways to train and/or analyse their technique and fitness to improve their performance. Consequently, laboratory and/or field-based physiological monitoring tools used at regular intervals at key time points throughout the year must be considered to help with training evaluation. The present review examines methods available in the literature to assess wheelchair sports fitness in a field-based environment, with special attention on outcome variables, validity and reliability issues, and non-physiological influences on performance. It also lays out the context of field-based testing by providing details about the Paralympic court sports and the impacts of a disability on sporting performance. Due to the limited availability of specialized equipment for testing wheelchair-dependent participants in the laboratory, the adoption of field-based testing has become the preferred option by team coaches of wheelchair athletes. An obvious advantage of field-based testing is that large groups of athletes can be tested in less time. Furthermore, athletes are tested in their natural environment (using their normal sports wheelchair set-up and floor surface), potentially making the results of such testing

  12. Symposium on the research field of soft robotics

    CERN Document Server

    Albu-Schäffer, Alin; Brock, Oliver; Raatz, Annika; Soft Robotics : Transferring Theory to Application

    2015-01-01

    The research areas as well as the knowledge gained for the practical use of robots are growing and expanding beyond manufacturing and industrial automation, making inroads in sectors such as health care and terrain sensing, as well as general assistive systems working in close interaction with humans. In a situation like this, it is necessary for future robot systems to become less stiff and more specialized by taking inspiration from the mechanical compliance and versatility found in natural materials and organisms. At present, a new discipline is emerging in this area, called »Soft Robotics«. It particularly challenges the traditional thinking of engineers, as the confluence of technologies, ranging from new materials, sensors, actuators and production techniques to new design tools, will make it possible to create new systems whose structures are almost completely made of soft materials, which bring about entirely new functions and behaviors, similar in many ways to natural systems. These Proceedings foc...

  13. Melding Research on the Navajo Volcanic Field into Undergraduate Curriculum to Promote Scientific Literacy

    Science.gov (United States)

    Gonzales, D. A.

    2011-12-01

    This presentation highlights the curricular design and preliminary outcomes of undergraduate research in the Department of Geosciences at Fort Lewis College (FLC), supported by an NSF-RUI project on the Navajo volcanic field (NVF). A prime impact of this project was to support the education and career development of undergraduate students by further developing basic knowledge and skills in the context of authentic inquiry on petrologic-based research topics. Integrating research into the curriculum promoted scientific habits of mind by engaging students as "active agents" in discovery, and the creative development and testing of ideas. It also gave students a sense of ownership in the scientific process and knowledge construction. The initial phase of this project was conducted in Igneous Petrology at FLC in 2010. Eleven students were enrolled in this course which allowed them to work as a team in collaboration with the PI, and engage in all aspects of research to further develop and hone their skills in scientific inquiry. This course involved a small component of traditional lecture in which selected topics were discussed to provide students with a foundation to understand magmatic processes. This was complemented by a comprehensive review of the literature in which students read and discussed a spectrum of articles on Tertiary magmatism in the western United States and the NVF. Invited lectures by leading-scientists in geology provided opportunities for discussions and interaction with professional geologists. All of the students in the class engaged in the active collection of petrologic data in the field and laboratory sessions, and were introduced to the use of state-of-the art analytical tools as part of their experiences. Four students were recruited from the course to design, develop, and conduct long-term research projects on selected petrologic topics in the NVF. This research allowed these students to engage in the "messy" process of testing existing

  14. Determining Loading Field based on Required Deformation for Isotropic Hardening Material

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    Eringen's and Trusedell's polar decomposition are formulated by explicit formulation of displacement field, based on Chen's additive decomposition of deformation gradient. Then the strain introduced by the multiplicative decomposition and the strain introduced by the additive decomposition are formulated explicitly with displacement gradient. This formulation clears the intrinsic contents of strains defined by taking the Eringen's and Trusedell's polar decomposition. After that, Chen's strain definition was introduced to show that the plastic deformation can be understood as the irreversible local average rotation. For initial isotropic simple elastic material, the research shows that path-dependent feature of classical plasticity theory is naturally expressed in Chen's strain definition. For rate-independent plasticity, the related deformation stress was discussed. The research shows that for isotropic hardening material the relation equation between the required geometric configuration and the corresponding loading field is explicitly formulated. Hence, for metal forming, this paper explicitly formulates the related fields by displacement field and invariant elastic constants.

  15. Fowler Nordheim theory of carbon nanotube based field emitters

    Science.gov (United States)

    Parveen, Shama; Kumar, Avshish; Husain, Samina; Husain, Mushahid

    2017-01-01

    Field emission (FE) phenomena are generally explained in the frame-work of Fowler Nordheim (FN) theory which was given for flat metal surfaces. In this work, an effort has been made to present the field emission mechanism in carbon nanotubes (CNTs) which have tip type geometry at nanoscale. High aspect ratio of CNTs leads to large field enhancement factor and lower operating voltages because the electric field strength in the vicinity of the nanotubes tip can be enhanced by thousand times. The work function of nanostructure by using FN plot has been calculated with reverse engineering. With the help of modified FN equation, an important formula for effective emitting area (active area for emission of electrons) has been derived and employed to calculate the active emitting area for CNT field emitters. Therefore, it is of great interest to present a state of art study on the complete solution of FN equation for CNTs based field emitter displays. This manuscript will also provide a better understanding of calculation of different FE parameters of CNTs field emitters using FN equation.

  16. Fowler Nordheim theory of carbon nanotube based field emitters

    Energy Technology Data Exchange (ETDEWEB)

    Parveen, Shama; Kumar, Avshish [Department of Physics, Jamia Millia Islamia (Central University), New Delhi (India); Husain, Samina [Centre for Nanoscience and Nanotechnology, Jamia Millia Islamia (Central University), New Delhi (India); Husain, Mushahid, E-mail: mush_reslab@rediffmail.com [Department of Physics, Jamia Millia Islamia (Central University), New Delhi (India)

    2017-01-15

    Field emission (FE) phenomena are generally explained in the frame-work of Fowler Nordheim (FN) theory which was given for flat metal surfaces. In this work, an effort has been made to present the field emission mechanism in carbon nanotubes (CNTs) which have tip type geometry at nanoscale. High aspect ratio of CNTs leads to large field enhancement factor and lower operating voltages because the electric field strength in the vicinity of the nanotubes tip can be enhanced by thousand times. The work function of nanostructure by using FN plot has been calculated with reverse engineering. With the help of modified FN equation, an important formula for effective emitting area (active area for emission of electrons) has been derived and employed to calculate the active emitting area for CNT field emitters. Therefore, it is of great interest to present a state of art study on the complete solution of FN equation for CNTs based field emitter displays. This manuscript will also provide a better understanding of calculation of different FE parameters of CNTs field emitters using FN equation.

  17. Shape-based separation of microparticles with magnetic fields

    Science.gov (United States)

    Wang, Cheng; Zhou, Ran

    2016-11-01

    Precise manipulations, e.g., sorting and focusing, of nonspherical micro-particles in fluidic environment has important applications in the fields of biology sciences and biomedical engineering. However, non-spherical microparticles are hard to manipulate because they tumble in shear flows. Most of existing techniques, including traditional filtration and centrifugation, and recent microfluidic technology, have difficulty in separating microparticles by shape. We demonstrate a novel shape-based separation technique by combining external magnetic fields with pressure-driven flows in a microchannel. Due to the magnetic field, prolate ellipsoidal particles migrate laterally at different speeds than the spherical ones, leading to effective separation. Our experimental investigations reveal the underlying physical mechanism of the observed shape-dependent migration. We find that the magnetic field breaks the rotational symmetry of the nonspherical particles, and induces shape-dependent lift force and migration velocity.

  18. Submarine Magnetic Field Extrapolation Based on Boundary Element Method

    Institute of Scientific and Technical Information of China (English)

    GAO Jun-ji; LIU Da-ming; YAO Qiong-hui; ZHOU Guo-hua; YAN Hui

    2007-01-01

    In order to master the magnetic field distribution of submarines in the air completely and exactly and study the magnetic stealthy performance of submarine, a mathematic model of submarine magnetic field extrapolation is built based on the boundary element method (BEM). An experiment is designed to measure three components of magnetic field on the envelope surface surrounding a model submarine. The data in differentheights above the model submarine are obtained by use of tri-axial magnetometers. The results show that this extrapolation model has good stabilities and high accuracies compared the measured data with the extrapolated data. Moreover, the model can reflect the submarine magnetic field distribution in the air exactly, and is valuable in practical engineering.

  19. Location Fingerprint Extraction for Magnetic Field Magnitude Based Indoor Positioning

    Directory of Open Access Journals (Sweden)

    Wenhua Shao

    2016-01-01

    Full Text Available Smartphone based indoor positioning has greatly helped people in finding their positions in complex and unfamiliar buildings. One popular positioning method is by utilizing indoor magnetic field, because this feature is stable and infrastructure-free. In this method, the magnetometer embedded on the smartphone measures indoor magnetic field and queries its position. However, the environments of the magnetometer are rather harsh. This harshness mainly consists of coarse-grained hard/soft-iron calibrations and sensor electronic noise. The two kinds of interferences decrease the position distinguishability of the magnetic field. Therefore, it is important to extract location features from magnetic fields to reduce these interferences. This paper analyzes the main interference sources of the magnetometer embedded on the smartphone. In addition, we present a feature distinguishability measurement technique to evaluate the performance of different feature extraction methods. Experiments revealed that selected fingerprints will improve position distinguishability.

  20. Educational interpreting as a field research: bibliometric study of international publications and their brands in the national field

    Directory of Open Access Journals (Sweden)

    Neiva Aquino Albres

    2013-04-01

    Full Text Available This study analyzes the development of academic research in the field of sign language interpretation, from 1990 to 2010. We adopted a bibliometric analysis of publications that discuss the interpretation of sign language and educational interpreting. The main purpose of this research was the survey and description of publications in international scientific journals how articulate these studies abroad with research on educational interpretation - EI in Brazil. To this end, we seek to make a crossing of international articles with references present in masters and doctoral researches in Brazil. We note that a very small number of researches make references to these articles on international EI indicating little articulation and debate with the scientific nonlocal published in journals.

  1. Space-Based Research in Fundamental Physics and Quantum Technologies

    Science.gov (United States)

    Turyshev, Slava G.; Israelsson, Ulf E.; Shao, Michael; Yu, Nan; Kusenko, Alexander; Wright, Edward L.; Everitt, C. W. Francis; Kasevich, Mark; Lipa, John A.; Mester, John C.; Reasenberg, Robert D.; Walsworth, Ronald L.; Ashby, Neil; Gould, Harvey; Paik, Ho Jung

    Space offers unique experimental conditions and a wide range of opportunities to explore the foundations of modern physics with an accuracy far beyond that of ground-based experiments. Space-based experiments today can uniquely address important questions related to the fundamental laws of Nature. In particular, high-accuracy physics experiments in space can test relativistic gravity and probe the physics beyond the Standard Model; they can perform direct detection of gravitational waves and are naturally suited for investigations in precision cosmology and astroparticle physics. In addition, atomic physics has recently shown substantial progress in the development of optical clocks and atom interferometers. If placed in space, these instruments could turn into powerful high-resolution quantum sensors greatly benefiting fundamental physics. We discuss the current status of space-based research in fundamental physics, its discovery potential, and its importance for modern science. We offer a set of recommendations to be considered by the upcoming National Academy of Sciences' Decadal Survey in Astronomy and Astrophysics. In our opinion, the Decadal Survey should include space-based research in fundamental physics as one of its focus areas. We recommend establishing an Astronomy and Astrophysics Advisory Committee's interagency "Fundamental Physics Task Force" to assess the status of both ground- and space-based efforts in the field, to identify the most important objectives, and to suggest the best ways to organize the work of several federal agencies involved. We also recommend establishing a new NASA-led interagency program in fundamental physics that will consolidate new technologies, prepare key instruments for future space missions, and build a strong scientific and engineering community. Our goal is to expand NASA's science objectives in space by including "laboratory research in fundamental physics" as an element in the agency's ongoing space research efforts.

  2. Medical Science: A Milestone in Scientific Field and Research

    Directory of Open Access Journals (Sweden)

    Indraneel Banerjee

    2013-09-01

    Full Text Available Dear SirI am writing in context of the first issue of Medical Science published recently. First I would like to congratulate the editor in Chief in particular for taking this initiative to start this esteemed journal. Medical Science is a peer reviewed multidisciplinary journal which publishes articles from various fields like medical, dental, nursing and allied health. I read with great interest the first issue of Medical Science which consists of five articles 1. The Editorial- Preface to first edition [1]2. Impact of Gender, Nationality and Drawbacks in Medical Profession as a Predictor of Future Career Specialization among Medical Students3. Use of computer among medical students: A cross sectional study4. Application of Binary Regression analysis in the prescription pattern of Antidepressants5. Teaching Communication Skills: A five year experience from a private medical school of NepalThe First edition was primarily focused on medical education. Article by Kumar S has showed that the use of computer is very important in life. It has exhibited that the use of computers are increasing in medical education technology. All the medical students should learn use computers as most of the laboratory investigations, X rays, open heart surgeries, C arm in Orthopaedic Surgeries are done with the help of computers. Even computer is needful for presenting any paper in the conferences by using power point presentations. So a medical student should learn computer because it will be useful for them in future [2].Article by Roy B et.al on drawbacks in medical profession is written with lot of effort. The article has showed that how proper steps can be taken to choose the future career of a medical student and what are the drawbacks of different specialties of medical profession [3].Teaching communication skills article is from a different field. It an article from Pharmacology. The article has demonstrated that Communication with the patients always remains

  3. [Research advances of anti-tumor immune response induced by pulse electric field ablation].

    Science.gov (United States)

    Cui, Guang-ying; Diao, Hong-yan

    2015-11-01

    As a novel tumor therapy, pulse electric field has shown a clinical perspective. This paper reviews the characteristics of tumor ablation by microsecond pulse and nanosecond pulse electric field, and the research advances of anti-tumor immune response induced by pulse electric field ablation. Recent researches indicate that the pulse electric field not only leads to a complete ablation of local tumor, but also stimulates a protective immune response, thereby inhibiting tumor recurrence and metastasis. These unique advantages will show an extensive clinical application in the future. However, the mechanism of anti-tumor immune response and the development of related tumor vaccine need further studies.

  4. 基于内部流场分析的小型轴流风扇结构优化%Small Axial Fan Structure Optimization Research Based on the Analysis of the Internal Flow Field

    Institute of Scientific and Technical Information of China (English)

    赵屹; 金英子; 吴文浩; 张立; 钱红玉

    2012-01-01

    In the paper, the authors apply theories of isolated blade design method, CFD technology, genetic algorithm, and use self-made software to optimize the hub ratio of axial flow fan. The optimization objective is fan flow. Then the authors comparatively analyze the fan internal flow field, including static characteristic, blade surface static pressure distribution and meridian plane vortex quantity distribution, etc. , to make sure the feasibility of this optimization method, and conclude the effect of hub ratio to the fan performance. The results show that the energy loss brought by vortex is reduced on fan blades and hub surface after optimization, while the vortex and energy loss on tip are increased slightly. In different flow, there are varied improvements on fan static pressure and outlet velocity after optimization. Under the rating conditions, the fan performance, static characteristic and internal flow field have good improvement.%采用孤立叶型设计法、CFD技术、遗传算法等理论,运用自编软件对某一轴流风扇轮毂比参数进行结构优化设计,优化目标为风扇流量.对比分析优化前后风扇内部流场,如风扇的静特性、叶片表面静压分布、子午面涡量分布等信息.由此验证优化方法的可行性,并总结轮毂比参数对此风扇性能的影响.结果表明:优化后风扇叶片和轮毂表面减小了因涡流带来的能量损失,但叶顶间隙处的涡流增大,能量损失略有增大;在不同流量下,优化后风扇静压有不同程度的提高;优化后风扇的出口速度均比优化前大幅提高;风扇在额定工况下性能、静特性及内部流场都得到了很好的改善.

  5. Connecting Lab-Based Attosecond Science with FEL research

    CERN Document Server

    CERN. Geneva

    2011-01-01

    In the last few years laboratory-scale femtosecond laser-based research using XUV light has developed dramatically following the successful development of attosecond laser pulses by means of high-harmonic generation. Using attosecond laser pulses, studies of electron dynamics on the natural timescale that electronic processes occur in atoms, molecules and solids can be contemplated, providing unprecedented insight into the fundamental role that electrons play in photo-induced processes. In my talk I will briefly review the present status of the attosecond science research field in terms of present and foreseen capabilities, and discuss a few recent applications, including a first example of the use of attosecond laser pulses in molecular science. In addition, I will discuss very recent results of experiments where photoionization of dynamically aligned molecules is investigated using a high-harmonics XUV source. Photoionization of aligned molecules becomes all the more interesting if the experiment is perfo...

  6. Phenomenography and grounded theory as research methods in computing education research field

    Science.gov (United States)

    Kinnunen, Päivi; Simon, Beth

    2012-06-01

    This paper discusses two qualitative research methods, phenomenography and grounded theory. We introduce both methods' data collection and analysis processes and the type or results you may get at the end by using examples from computing education research. We highlight some of the similarities and differences between the aim, data collection and analysis phases and the type of resulting outcomes of these methods. We also discuss the challenges and threats the both methods may pose to the researcher. We conclude that while aimed at tackling different types of research questions, both of these methods provide computing education researchers a useful tool in their research method toolbox.

  7. Modeling of Earth's Gravity Fields Visualization Based on Quad Tree

    Institute of Scientific and Technical Information of China (English)

    LUO Zhicai; LI Zhenhai; ZHONG Bo

    2010-01-01

    The problems of the earth's gravity fields' visualization are both focus and puzzle currently. Aiming at multiresolution rendering, modeling of the Earth's gravity fields' data is discussed in the paper by using LOD algorithm based on Quad Tree. First,this paper employed the method of LOD based on Quad Tree to divide up the regional gravity anomaly data, introduced the combined node evaluation system that was composed of viewpoint related and roughness related systems, and then eliminated the T-cracks that appeared among the gravity anomaly data grids with different resolutions. The test results demonstrated that the gravity anomaly data grids' rendering effects were living, and the computational power was low. Therefore, the proposed algorithm was a suitable method for modeling the gravity anomaly data and has potential applications in visualization of the earth's gravity fields.

  8. Regularization of identity based solution in string field theory

    Science.gov (United States)

    Zeze, Syoji

    2010-10-01

    We demonstrate that an Erler-Schnabl type solution in cubic string field theory can be naturally interpreted as a gauge invariant regularization of an identity based solution. We consider a solution which interpolates between an identity based solution and ordinary Erler-Schnabl one. Two gauge invariant quantities, the classical action and the closed string tadpole, are evaluated for finite value of the gauge parameter. It is explicitly checked that both of them are independent of the gauge parameter.

  9. Regularization of identity based solution in string field theory

    CERN Document Server

    Zeze, Syoji

    2010-01-01

    We demonstrate that an Erler-Schnabl type solution in cubic string field theory can be naturally interpreted as a gauge invariant regularization of an identity based solution. We consider a solution which interpolates between an identity based solution and ordinary Erler-Schnabl one. Two gauge invariant quantities, the classical action and the closed string tadpole, are evaluated for finite value of the gauge parameter. It is explicitly checked that both of them are independent of the gauge parameter.

  10. Comprehensive Research Experiment Based on the Electromagnetic Field Theory Practice%基于电磁场理论实践性的综合研究型实验

    Institute of Scientific and Technical Information of China (English)

    熊素铭; 倪培宏; 杨仕友; 倪光正

    2015-01-01

    The design objective of new experiment for the Electromagnetic Force is highlighting the electromagnetic field theory in teaching practice. The experiment has won positive response from students. It can be confirmed that the experiment enlightened the students to establish engineering analysis point of view. Students can better master the image method,the virtual displacement method,and understand the application of ferromagnetic materials in e-lectromagnetic engineering. This comprehensive innovative experiment helps students improve their ability of analy-zing and solving electromagnetic engineering problems.%本文介绍的“电磁力”新实验设计的理念,凸显了电磁场理论教学内容的实践性。新实验的开设赢得了学生全方位的积极反响。实践证明,该实验在启迪学生建立工程分析观点,掌握镜像法和虚位移法,评价铁磁材料在电磁工程应用中的价值等知识点,以及掌握相应的分析与解决工程问题能力方面,充分展示了作为综合研究型创新实验的固有特色。

  11. A Collaborative Field-Based Urban Teacher Education Program.

    Science.gov (United States)

    Guyton, Edith; And Others

    1993-01-01

    Describes a 12-month, field-based, alternative teacher preparation program for individuals holding baccalaureate degrees in areas outside education who want master's degrees in early childhood education. The program involves collaboration between the State Department of Education, the Early Childhood Department of an urban university, and four…

  12. Field-Based Concerns about Fourth-Generation Evaluation Theory.

    Science.gov (United States)

    Lai, Morris K.

    Some aspects of fourth generation evaluation procedures that have been advocated by E. G. Guba and Y. S. Lincoln were examined empirically, with emphasis on areas where there have been discrepancies between theory and field-based experience. In fourth generation evaluation, the product of an evaluation is not a set of conclusions, recommendations,…

  13. Durable chemical sensors based on field-effect transistors

    NARCIS (Netherlands)

    Reinhoudt, D.N.

    1995-01-01

    The design of durable chemical sensors based on field-effect transistors (FETs) is described. After modification of an ion-sensitive FET (ISFET) with a polysiloxane membrane matrix, it is possible to attach all electroactive components covalently. Preliminary results of measurements with a sodium-se

  14. Sound field reconstruction based on the acousto-optic effect

    DEFF Research Database (Denmark)

    Torras Rosell, Antoni; Barrera Figueroa, Salvador; Jacobsen, Finn

    2011-01-01

    Acoustic measurements are usually carried out with transducers that interact mechanically with the sound field under investigation. The goal of this work is to employ a completely different measurement principle, the determination of sound pressure based on the interaction between sound and light...

  15. Field-based validation of a tactile navigation device

    NARCIS (Netherlands)

    Elliott, L.R.; Erp, J. van; Redden, E.S.; Duistermaat, M.

    2010-01-01

    In this paper, we present three field-based evaluations of a tactile land navigation system. In Experiment 1, we transition from a laboratory setting to rugged terrain used to train US Army soldier land navigation. Navigation in this challenging terrain requires careful attention to one's surroundin

  16. A Collaborative Field-Based Urban Teacher Education Program.

    Science.gov (United States)

    Guyton, Edith; And Others

    1993-01-01

    Describes a 12-month, field-based, alternative teacher preparation program for individuals holding baccalaureate degrees in areas outside education who want master's degrees in early childhood education. The program involves collaboration between the State Department of Education, the Early Childhood Department of an urban university, and four…

  17. Public Key Cryptography Based on Ergodic Matrices over Finite Field

    Institute of Scientific and Technical Information of China (English)

    PEI Shihui; ZHAO Hongwei; ZHAO Yongzhe

    2006-01-01

    A new public key encryption scheme is proposed in this paper, which is based on a hard problem over ergodic matrices. The security of this scheme is equal to the MQ-problem: multivariate quadratic equations over finite fields. This problem has been shown to be NP-complete and can' be solved with polynomial time algorithm.

  18. Participative Critical Enquiry in Graduate Field-Based Learning

    Science.gov (United States)

    Reilly, Kathy; Clavin, Alma; Morrissey, John

    2016-01-01

    This paper outlines a critical pedagogic approach to field-based learning (FBL) at graduate level. Drawing on student experience stemming from a FBL module and as part of an MA programme in Environment, Society and Development, the paper addresses the complexities associated with student-led, participative critical enquiry during fieldwork in…

  19. Postscript: Researching Stochastic Understanding--The Place of a Developing Research Field in PME.

    Science.gov (United States)

    Truran, John

    2001-01-01

    Traces some aspects of the development of stochastics education and research to provide a background for understanding the place of the Psychology of Mathematics Education (PME) Stochastics Group in the research process. (MM)

  20. Modeling research in low-medium temperature geothermal field, Tianjin

    Institute of Scientific and Technical Information of China (English)

    王坤; 李春华

    2002-01-01

    The geothermal reservoir in Tianjin can be divided into two parts: the upper one is the porous medium reservoir in the Tertiary system; the lower one includes the basement reservoir in Lower Paleozoic and Middle-Upper Proterozoic. Hot springs are exposed in the northern mountain and confined geothermal water is imbedded in the southern plain. The geothermal reservoir is incised by several fractures. In recent years, TDS of the geothermal water have gone up along with the production rate increasing, along the eastern fracture zone (Cangdong Fracture and West Baitangkou Fracture). This means that the northern fracture system is the main seepage channel of the deep circulation geothermal water, and the reservoir has good connection in a certain area and definite direction. The isotopic research about hydrogen and carbon chronology indicates that the main recharge period of geothermal water is the Holocene Epoch, the pluvial and chilly period of 20 kaBP. The karst conduits in weathered carbonate rocks of the Proterozoic and Lower Paleozoic and the northeast regional fracture system are the main feeding channels of Tianjin geothermal water. Since the Holocene epoch, the geothermal water stayed at a sealed warm period. The tracer test in WR45 doublet system shows that the tracer test is a very effective measure for understanding the reservoir's transport nature and predicting the cooling time and transport velocity during the reinjection. 3-D numerical simulation shows that if the reinjection well keeps a suitable distance from the production well, reinjection will be a highly effective measure to extract more thermal energy from the rock matrix. The cooling of the production well will not be a problem.

  1. Repeater” studies – Development of a new research field

    Directory of Open Access Journals (Sweden)

    Leiv S. Bakketeig

    2009-10-01

    Full Text Available The tendency to repeat birth weight in successive birth was first published in 1977. The study was based on 81 400 mothers who had their first and second singleton birth within the study period 1967-73, based on information in the Medical Birth Registry of Norway. The paper was presented at a large NICHD (National Center of Child Health and Human Development, NIH seminar focusing on preterm birth. This meeting started a creative, international long lasting collaboration, a series of papers and book chapters has been published. It seemed like mothers are programmed to give birth to babies of a certain size and age. And if they depart from this norm the baby is at an increased risk of mortality. Also, the tendency to repeat gestational age and birth weight exists across generations, with the same increased risk if the pattern is departed from. This means that if a mother who herself was of low birth weight give birth to a likewise small baby, then that baby has improved survival compared to a likewise small baby where the mother was relatively heavy. This effect across generations is also present on the paternal in addition to the maternal side. Recently the medical birth registration data set has provided possibilities to examine the effect of changing partners from one pregnancy to the next one. Also, half siblings (maternal and paternal is another valuable data source to explore. Soon 3 generational repeater studies will become available as the first births in the registry by now become grandmothers and grandfathers.

  2. Research on Acoustic Field of Ultrasonic Linear Phased Array Based on Spatial Impulse Response of Rectangular Planar Transducer%基于矩形换能器空间脉冲响应的相控阵声场研究

    Institute of Scientific and Technical Information of China (English)

    马宏伟; 董明; 陈渊; 张旭辉

    2014-01-01

    针对矩形换能器空间脉冲响应利用分割阵元叠加和近似方法求解,提出一种精确求解的新方法。根据矩形换能器的对称性将观察点转换到第四象限进行求解,该方法不需要远场或近轴近似,只需要坐标变换就可以得到任意长宽比的矩形换能器在不同空间点处的脉冲响应函数。通过控制各阵元的延时实现相控阵声束的偏转和聚焦,分析一维相控阵的聚焦法则,得到各阵元的延时时间;对各矩形阵元加延时控制后的空间脉冲响应叠加求和,得到相控阵聚焦时的空间脉冲响应,进而求得各空间点的声压。计算相控阵换能器在不同聚焦角度时的空间声压分布,讨论不同阵元间距对分辨力的影响。结果表明该方法可以快速准确地计算较大偏转范围内的相控阵声场。%An analytical method for calculating spatial impulse response of rectangular transducer without far-field or paraxial approximations is presented. According to symmetry of rectangular, the coordinate of observe point is transformed in the fourth quadrant. The solution using only inverse trigonometric functions and simple coordinate transformation, and impulse response of rectangular transducer with different length-width ratios can be calculated. Ultrasonic phased array can freely control the focus point position by exciting each element with independent phase delay, the focus laws of the ultrasonic l-D phased array are derived and the delay time of each element is obtained, then delay time is applied in every transducer element, and the impulse response of phased array transducer is obtained by superposition spatial impulse response of each element. Simulations are carried out for a l-D array transducer in different focusing angles, and the resolution of different distance between the transmitting elements is discussed. Results show that this method can efficiently and accurately predict the radiation field

  3. Composite Field Multiplier based on Look-Up Table for Elliptic Curve Cryptography Implementation

    Directory of Open Access Journals (Sweden)

    Marisa W. Paryasto

    2013-09-01

    Full Text Available Implementing a secure cryptosystem requires operations involving hundreds of bits. One of the most recommended algorithm is Elliptic Curve Cryptography (ECC. The complexity of elliptic curve algorithms and parameters with hundreds of bits requires specific design and implementation strategy. The design architecture must be customized according to security requirement, available resources and parameter choices. In this work we propose the use of composite field to implement finite field multiplication for ECC implementation. We use 299-bit keylength represented in GF((21323 instead of in GF(2299. Composite field multiplier can be implemented using different multiplier for ground-field and for extension field. In this paper, LUT is used for multiplication in the ground-field and classic multiplieris used for the extension field multiplication. A generic architecture for the multiplier is presented. Implementation is done with VHDL with the target device Altera DE2. The work in this paper uses the simplest algorithm to confirm the idea that by dividing field into composite, use different multiplier for base and extension field would give better trade-off for time and area. This work will be the beginning of our more advanced further research that implements composite-field using Mastrovito Hybrid, KOA and LUT.

  4. A Study on the Hot Fields and Develop Path of Domestic Information Behavior Research Based on Complex Network Method%基于复杂网络的国内信息行为研究热点及衍化路径分析

    Institute of Scientific and Technical Information of China (English)

    韩秋明

    2012-01-01

    通过CNKI获取信息行为领域研究论文的关键词数据,采用社会网络的方法构建信息行为研究概念(关键词)的无向加权网络,验证该网络所具有的社会网络特性,计算网络节点的程度中心性和中介中心性;采用G-N聚类算法对国内信息行为研究概念网络进行聚类分析,划分出10大分支领域,通过计算时间隶属度进行历时分析,以此描绘我国信息行为研究的发展轨迹。%Based on the keywords in the field of information behavior from CNKI, this paper constructs an undirected weighting network by using co-word analysis, and verifies the characters of the network, calculates the index of degree centrality and betweenness centrality. Using the G-N clustering algorithm, the paper performs a cluster analysis on the domestic information behavior research concept network, divides the research field into 10 different branches. Finally, computing its time properties, this paper portrays the de- velop path of the domestic information behavior.

  5. Prediction of adsorption of small molecules in porous materials based on ab initio force field method

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    Computational prediction of adsorption of small molecules in porous materials has great impact on the basic and applied research in chemical engineering and material sciences. In this work,we report an approach based on grand canonical ensemble Monte Carlo(GCMC) simulations and ab initio force fields. We calculated the adsorption curves of ammonia in ZSM-5 zeolite and hydrogen in MOF-5(a metal-organic-framework material). The predictions agree well with experimental data. Because the predictions are based on the first principle force fields,this approach can be used for the adsorption prediction of new molecules or materials without experimental data as guidance.

  6. Research Progress on Application of Metakaolin in the Field of Cement-based Materials%偏高岭土在水泥基材料中应用的研究进展

    Institute of Scientific and Technical Information of China (English)

    王子嘉

    2013-01-01

    The influence of porpsity,mechanical properties and hydration characteristics of cement-based materials made with metakaolin along with its pozzolanic activity and activation process were reviewed.The emphasis was placed on the durability of cement-based material made with metakaolin,including anti-chloride penetration,anti-sulphate attack,anti-ASR attack and shrinkage.In addition,the aspects for future development and application are proposed.%对偏高岭土的火山灰活性,煅烧工艺,及其对水泥基材料孔结构,水化过程,力学性能的影响进行了综述.详细总结了偏高岭土改性水泥基材料耐久性能的研究进展,包括抗氯离子渗透性能,抗硫酸盐侵蚀性能,抗碱硅酸反应性能,及改性材料的收缩性能,最后提出了偏高岭土矿物掺合料未来的发展趋势并对应用前景进行了展望.

  7. The data platform of national special environment and disaster field observation stations based on grid environment

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    The Data Platform of Resource and Environment-whose data mainly come from field observation stations,spatial observations,and internet service institutions-is the base of data analysis and model simulation in geoscience research in China.Among this integrated data platform,the tasks of the data platform of field observation stations are principally data collection,management,assimilation,and share service.Taking into consideration the distributing characteristics of the data sources and the service objects,the authors formulated the framework of the field observation stations’ data platform based on the grid technology and designed its operating processes.The authors have further defined and analyzed the key functions and implementing techniques for each module.In a Linux operating system,validation tests for the data platform’s function on data replication,data synchronization,and unified data service have been conducted under an environment that of the simulating field stations.

  8. Theory of Carbon Nanotube (CNT-Based Electron Field Emitters

    Directory of Open Access Journals (Sweden)

    Alexander V. Eletskii

    2013-07-01

    Full Text Available Theoretical problems arising in connection with development and operation of electron field emitters on the basis of carbon nanotubes are reviewed. The physical aspects of electron field emission that underlie the unique emission properties of carbon nanotubes (CNTs are considered. Physical effects and phenomena affecting the emission characteristics of CNT cathodes are analyzed. Effects given particular attention include: the electric field amplification near a CNT tip with taking into account the shape of the tip, the deviation from the vertical orientation of nanotubes and electrical field-induced alignment of those; electric field screening by neighboring nanotubes; statistical spread of the parameters of the individual CNTs comprising the cathode; the thermal effects resulting in degradation of nanotubes during emission. Simultaneous consideration of the above-listed effects permitted the development of the optimization procedure for CNT array in terms of the maximum reachable emission current density. In accordance with this procedure, the optimum inter-tube distance in the array depends on the region of the external voltage applied. The phenomenon of self-misalignment of nanotubes in an array has been predicted and analyzed in terms of the recent experiments performed. A mechanism of degradation of CNT-based electron field emitters has been analyzed consisting of the bombardment of the emitters by ions formed as a result of electron impact ionization of the residual gas molecules.

  9. Theory of Carbon Nanotube (CNT)-Based Electron Field Emitters.

    Science.gov (United States)

    Bocharov, Grigory S; Eletskii, Alexander V

    2013-07-17

    Theoretical problems arising in connection with development and operation of electron field emitters on the basis of carbon nanotubes are reviewed. The physical aspects of electron field emission that underlie the unique emission properties of carbon nanotubes (CNTs) are considered. Physical effects and phenomena affecting the emission characteristics of CNT cathodes are analyzed. Effects given particular attention include: the electric field amplification near a CNT tip with taking into account the shape of the tip, the deviation from the vertical orientation of nanotubes and electrical field-induced alignment of those; electric field screening by neighboring nanotubes; statistical spread of the parameters of the individual CNTs comprising the cathode; the thermal effects resulting in degradation of nanotubes during emission. Simultaneous consideration of the above-listed effects permitted the development of the optimization procedure for CNT array in terms of the maximum reachable emission current density. In accordance with this procedure, the optimum inter-tube distance in the array depends on the region of the external voltage applied. The phenomenon of self-misalignment of nanotubes in an array has been predicted and analyzed in terms of the recent experiments performed. A mechanism of degradation of CNT-based electron field emitters has been analyzed consisting of the bombardment of the emitters by ions formed as a result of electron impact ionization of the residual gas molecules.

  10. Theory of Carbon Nanotube (CNT)-Based Electron Field Emitters

    Science.gov (United States)

    Bocharov, Grigory S.; Eletskii, Alexander V.

    2013-01-01

    Theoretical problems arising in connection with development and operation of electron field emitters on the basis of carbon nanotubes are reviewed. The physical aspects of electron field emission that underlie the unique emission properties of carbon nanotubes (CNTs) are considered. Physical effects and phenomena affecting the emission characteristics of CNT cathodes are analyzed. Effects given particular attention include: the electric field amplification near a CNT tip with taking into account the shape of the tip, the deviation from the vertical orientation of nanotubes and electrical field-induced alignment of those; electric field screening by neighboring nanotubes; statistical spread of the parameters of the individual CNTs comprising the cathode; the thermal effects resulting in degradation of nanotubes during emission. Simultaneous consideration of the above-listed effects permitted the development of the optimization procedure for CNT array in terms of the maximum reachable emission current density. In accordance with this procedure, the optimum inter-tube distance in the array depends on the region of the external voltage applied. The phenomenon of self-misalignment of nanotubes in an array has been predicted and analyzed in terms of the recent experiments performed. A mechanism of degradation of CNT-based electron field emitters has been analyzed consisting of the bombardment of the emitters by ions formed as a result of electron impact ionization of the residual gas molecules. PMID:28348342

  11. Electromechanical field effect transistors based on multilayer phosphorene nanoribbons

    Energy Technology Data Exchange (ETDEWEB)

    Jiang, Z.T., E-mail: jiangzhaotan@hotmail.com; Lv, Z.T.; Zhang, X.D.

    2017-06-21

    Based on the tight-binding Hamiltonian approach, we demonstrate that the electromechanical field effect transistors (FETs) can be realized by using the multilayer phosphorene nanoribbons (PNRs). The synergistic combination of the electric field and the external strains can establish the on–off switching since the electric field can shift or split the energy band, and the mechanical strains can widen or narrow the band widths. This kind of multilayer PNR FETs, much solider than the monolayer PNR one and more easily biased by different electric fields, has more transport channels consequently leading to the higher on–off current ratio or the higher sensitivity to the electric fields. Meanwhile, the strain-induced band-flattening will be beneficial for improving the flexibility in designing the electromechanical FETs. In addition, such electromechanical FETs can act as strain-controlled FETs or mechanical detectors for detecting the strains, indicating their potential applications in nano- and micro-electromechanical fields. - Highlights: • Electromechanical transistors are designed with multilayer phosphorene nanoribbons. • Electromechanical synergistic effect can establish the on–off switching more flexibly. • Multilayer transistors, solider and more easily biased, has more transport channels. • Electromechanical transistors can act as strain-controlled transistors or mechanical detectors.

  12. Desert Research and Technology Studies (RATS) 2007 Field Campaign Objectives and Results

    Science.gov (United States)

    Kosmo, Joseph; Romig, Barbara

    2008-01-01

    Desert "RATS" (Research and Technology Studies) is a combined, multi-discipline group of inter-NASA center scientists and engineers, net-working and collaborating with representatives of industry and academia, for the purpose of conducting planetary surface exploration-focused remote field exercises. These integrated testing exercises conducted under representative analog Lunar and Mars surface terrain conditions, provide NASA the capability to validate experimental prototype hardware and software systems as well as to evaluate and develop mission operational techniques in order to identify and establish technical requirements and identify potential technology "gaps" applicable for future planetary human exploration. The 2007 D-RATS field campaign test activities were initiated based on the major themes and objectives of a notional 5-year plan developed for conducting relative analog test activities in support of the engineering evaluation and assessment of various system architectural requirements, conceptual prototype support equipment and selected technologies necessary for the establishment of a lunar outpost. Specifically, the major objectives included measuring task efficiency during robot, human, and human-robot interactive tasks associated with lunar outpost site surveying and reconnaissance activities and deployment of a representative solar panel power and distribution system. In addition, technology demonstrations were conducted with a new Lithium-ion battery and autonomous software to coordinate multiple robot activities. Secondary objectives were evaluating airlock concept mockups and prototype removable space suit over-garment elements for dust mitigation, and upgrades to the prototype extravehicular activities (EVA) communication and information system. Dry run test activities, prior to testing at a designated remote field site location, were initially conducted at the Johnson Space Center (JSC) Remote Field Demonstration Test Site. This is a multi

  13. Desert Research and Technology Studies (RATS) 2007 Field Campaign Objectives and Results

    Science.gov (United States)

    Kosmo, Joseph; Romig, Barbara

    2008-01-01

    Desert "RATS" (Research and Technology Studies) is a combined, multi-discipline group of inter-NASA center scientists and engineers, net-working and collaborating with representatives of industry and academia, for the purpose of conducting planetary surface exploration-focused remote field exercises. These integrated testing exercises conducted under representative analog Lunar and Mars surface terrain conditions, provide NASA the capability to validate experimental prototype hardware and software systems as well as to evaluate and develop mission operational techniques in order to identify and establish technical requirements and identify potential technology "gaps" applicable for future planetary human exploration. The 2007 D-RATS field campaign test activities were initiated based on the major themes and objectives of a notional 5-year plan developed for conducting relative analog test activities in support of the engineering evaluation and assessment of various system architectural requirements, conceptual prototype support equipment and selected technologies necessary for the establishment of a lunar outpost. Specifically, the major objectives included measuring task efficiency during robot, human, and human-robot interactive tasks associated with lunar outpost site surveying and reconnaissance activities and deployment of a representative solar panel power and distribution system. In addition, technology demonstrations were conducted with a new Lithium-ion battery and autonomous software to coordinate multiple robot activities. Secondary objectives were evaluating airlock concept mockups and prototype removable space suit over-garment elements for dust mitigation, and upgrades to the prototype extravehicular activities (EVA) communication and information system. Dry run test activities, prior to testing at a designated remote field site location, were initially conducted at the Johnson Space Center (JSC) Remote Field Demonstration Test Site. This is a multi

  14. Complexity and agent-based modelling in urban research

    DEFF Research Database (Denmark)

    Fertner, Christian

    Urbanisation processes are results of a broad variety of actors or actor groups and their behaviour and decisions based on different experiences, knowledge, resources, values etc. The decisions done are often on a micro/individual level but resulting in macro/collective behaviour. In urban research...... influence on the bigger system. Traditional scientific methods or theories often tried to simplify, not accounting complex relations of actors and decision-making. The introduction of computers in simulation made new approaches in modelling, as for example agent-based modelling (ABM), possible, dealing...... of complexity for a majority of science, there exists a huge number of scientific articles, books, tutorials etc. to these topics which doesn’t make it easy for a novice in the field to find the right literature. The literature used gives an optimistic outlook for the future of this methodology, although ABM...

  15. Researching and implementation of reconfigurable Hash chip based on FPGA

    Institute of Scientific and Technical Information of China (English)

    Yang Xiaohui; Dai Zibin; Liu Yuanfeng; Wang Ting

    2007-01-01

    The reconfigurable cryptographic chip is an integrated circuit that is designed by means of the method of reconfigurable architecture, and is used for encryption and decryption. Many different cipher algorithms can be flexibly implemented with the aid of a reconfigurable cryptographic chip and can be used in many fields. This article takes an example for the SHA-1/224/256 algorithms, and then designs a reconfigurable cryptographic chip based on the thought and method of the reconfigurable architecture. Finally, this paper gives the implementation result based on the FPGA of the family of Stratix II of Altera Corporation, and presents a good research trend for resolving the storage in hardware implementation using FPGAs.

  16. Research of Embedded Tower Crane Monitoring System Based on FCS

    Directory of Open Access Journals (Sweden)

    Xijian Zheng

    2013-09-01

    Full Text Available To compensate for the lack of traditional safety limit device of tower crane, a design scheme of embedded tower crane intelligent monitoring system based on Fieldbus Control System was proposed. By this, online collection and transmission of tower crane real-time conditions were achieved, which could effectively improve the reliability and anti-interference of the system. Embedded development technology was used to build ARM-based master control platform. Embedded Linux cross-compiler environment was also built. Combining with embedded programming software, human-computer interaction interface of tower crane intelligent monitoring system was built, storage and display of tower crane’s online parameters were also realized. The use of the technology has opened up a new field of tower crane condition monitoring application. The research of this paper may provide reference for tower crane safety monitoring and fault diagnosing.

  17. Deep Vadose Zone–Applied Field Research Initiative Fiscal Year 2012 Annual Report

    Energy Technology Data Exchange (ETDEWEB)

    Wellman, Dawn M.; Truex, Michael J.; Johnson, Timothy C.; Bunn, Amoret L.; Golovich, Elizabeth C.

    2013-03-14

    This annual report describes the background of the Deep Vadose Zone-Applied Field Research Initiative, and some of the programmatic approaches and transformational technologies in groundwater and deep vadose zone remediation developed during fiscal year 2012.

  18. A research on the empowerment plan for specialist in RI-biomics field

    Energy Technology Data Exchange (ETDEWEB)

    Shin, Wo Ho; Park, Tai Jin; Yeom, Yu Sun [Korea Association for Radiation Application, Seoul (Korea, Republic of); Park, Sang Hyun [Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup (Korea, Republic of)

    2014-12-15

    Increasing utilization of radiation and RI (Radioisotope) in nuclear industry including non-power area has achieved sustainable development of radiation industry. Industries are no longer confined by a single technology or abilities but expanded for application gradually. RIBiomics fields are one of the convergence technology that is recognized on a high-tech industry. Unlike the conventional industry, RI-Biomics field needs to various specialists to perform related task. There is no domestic training program to educate the whole process. This study aims to suggest the plan for improvement of practical skills for specialists in RI-Biomics through development of our training program. For this purpose, we have first investigated the opinion about classification scheme from experts and then analyzed the results in order to reflecting our training program. Based on analyzed results, conformity assessment was executed to organize curriculum through status of constructed device and instructor in domestic. Our training program was performed jointly with KAERI (Korea Atomic Energy Research Institute). RI-Biomics center is prepared with facilities of overall experiment to improve quality of education. Due to the fact that specialists have routine task, we organized a five-day short course to reflect temporal difficulties. We performed a trial operation to 6 participants in RI-Biomics field. Through the survey for the specialists who participated in the program, we evaluated the efficiency of our training program. The results showed that participants were satisfied with the organized curriculum and educational materials. Therefore, our program is expected to be utilized as basic research data to develop feasible program for policy development and to improve practical skills in RI-Biomics.

  19. Magnetic field sensor using a polymer-based vibrator

    Science.gov (United States)

    Wu, Jiang; Hasebe, Kazuhiko; Mizuno, Yosuke; Tabaru, Marie; Nakamura, Kentaro

    2016-09-01

    In this technical note, a polymer-based magnetic sensor with a high resolution was devised for sensing the high magnetic field. It consisted of a bimorph (vibrator) made of poly (phenylene sulfide) (PPS) and a phosphor-bronze foil glued on the free end of the bimorph. According to Faraday’s law of induction, when a magnetic field in the direction perpendicular to the bimorph was applied, the foil cut the magnetic flux, and generated an alternating voltage across the leads at the natural frequency of the bimorph. Because PPS has low mechanical loss, low elastic modulus, and low density, high vibration velocity can be achieved if it is employed as the elastomer of the bimorph. The devised sensor was tested in the magnetic field range of 0.1-570 mT and exhibited a minimum detectable magnetic field of 0.1 mT. At a zero-to-peak driving voltage of 60 V, the sensitivity of the PPS-based magnetic sensor reached 10.5 V T-1, which was 1.36 times the value of the aluminum-based magnetic sensor with the same principle and dimensions.

  20. Distributed optical fiber dynamic magnetic field sensor based on magnetostriction.

    Science.gov (United States)

    Masoudi, Ali; Newson, Trevor P

    2014-05-01

    A distributed optical fiber sensor is introduced which is capable of quantifying multiple magnetic fields along a 1 km sensing fiber with a spatial resolution of 1 m. The operation of the proposed sensor is based on measuring the magnetorestrictive induced strain of a nickel wire attached to an optical fiber. The strain coupled to the optical fiber was detected by measuring the strain-induced phase variation between the backscattered Rayleigh light from two segments of the sensing fiber. A magnetic field intensity resolution of 0.3 G over a bandwidth of 50-5000 Hz was demonstrated.

  1. Authentication-secrecy code based on conies over finite fields

    Institute of Scientific and Technical Information of China (English)

    裴定一; 王学理

    1996-01-01

    An authentication-secrecy code based on the rational normal curves over finite fields was constructed,whose probabilities of successful deception achieve their information-theoretic bounds.The set of encoding rules for this code is a representation system for cosets of a certain subgroup in the projective transformation group.A special case is studied,i.e.the rational normal curves are the conies over finite fields.The representation system for the cosets which determines the set of encoding rules will be given.

  2. 基于地电场响应的矿井顶板突水模拟实验%EXPERIMENTAL RESEARCH ON MINE ROOF WATER-INRUSH BASED ON RESPONSE OF GEOELECTRIC FIELD TO GROUNDWATER SEEPAGE

    Institute of Scientific and Technical Information of China (English)

    杨彩; 刘盛东; 胡泽安

    2012-01-01

    Through the establishment of the model for groundwater seepage-electric test, mine roof water-inrush was simulated and coarse-grained sand, medium-grained sand and fine-grained sand were partly used as aquifer media. The properties of transient response of parameters of the geoelectric field are real time monitored by network parallel electrical equipment. Through analyzing the variation curves of spontaneous potential, exciting voltage and exciting current with time and the pictures of apparent resistivity with time, the authors have found that the experiments on three different kinds of aquifer media show apparent response and basically have the same regularity. In the process of water-inrush, the spontaneous potential of coarse sand and medium sand are significantly lower than that of the two stages before and after water-inrush. The spontaneous potential of fine sand keeps growing and shows significant changes in the water-inrush point. And the exciting voltage and exciting current keep the same changes. Compared with the stages before and after water-inrush, the exciting voltage shows great reduction and the exciting current shows dramatic rise. The apparent resistivity section diagram can clearly show the change process at seepage, water-inrush and post-water-inrush stages, which can be applied to judge the water capacity of aquifer. The study is of practical significance for the study of mine flood forecast and prevention.%建立渗流电测模型,利用粗砂、中砂、细砂三种含水层介质模拟矿井顶板突水,采用网络并行电法仪实时监测地电场参数的瞬态响应特征.通过分析自然电位、一次场电位、激励电流随时间变化图及视电阻率断面图,发现三种不同含水层介质实验的地电场参数都有明显响应,响应规律基本一致.在突水阶段,粗砂和中砂的自然电位明显低于突水前、后的两个阶段,细砂自然电位持续上升,在突水点有显著变化;一次场电位

  3. 基于现代肝病范畴的张仲景临证医学思想研究%ZHANG Zhong-jing Clinical Theory Research Based on Modern Liver Diseases Treatment Fields

    Institute of Scientific and Technical Information of China (English)

    谭春雨; 梁慧风; 朱音; 黄瑛; 张宁; 方力行

    2011-01-01

    To demonstrate the medical treatise related to Hypochondriac pain, tympanites, jaundice and other diseases in Treatise on Febrile Diseases and Medical Treasures of the Golden Chamber, we believe that ZHANG Zhong-jing treated hypochondriac pain based on syndrome differentiation, owing its etiology to excess - evil blocking liver and gallbladder channels and vessels, attaching importance to relieving secondary symptoms in acute cases, treatment of chronic disease aiming at the principal aspect. Regarding to tympanites, owing its etiology to blood and Qi stagnation, blood stagnation could be induced by cold obstruction, damp - heat, scarce of essence , while Qi stagnation by cold obstruction, turbid phlegm, attaching importance to simultaneous application of purging and nourishing therapeusis. In conclusion, when Zhang Zhong Jing diagnosing and treating modern liver diseases based on syndrome differentiation, owing disease sites to liver, gallbladder, spleen and stomach, emphasizing invigorating liver, gallbladder, spleen and stomach, deficiency should be treated by supplementary therapy, stagnation should be treatment by promoting, treating heat syndrome with cold therapy, cold disease should be treated by warm therapy. All in all the treatment principles would be nourishing and invigorating the Qi of related Zang and Fu organs, also regulating and harmonizing them.%探讨了、有关胁痛、臌胀、黄疸等病症的医论方药文献,认为仲景辨治胁痛主要责之于实邪阻滞肝胆经脉以及精气虚损二端,治疗上强调固本培源,补益精气;辨治黄疸多责之于湿热、寒湿、瘀血、气血虚损、气机不利等,治疗上强调急则治标,缓则治本;辨治臌胀多责之于瘀血气滞两端,瘀血有寒凝血瘀、湿热血瘀、精枯血瘀等之别,气滞有寒凝气滞、痰浊气滞之分,治疗上强调攻补相宜.总结看,仲景辨治现代肝病相关病症,病住上多责之于肝胆脾胃,治法上强调健运肝胆脾

  4. Research-based teacher education: Interactions between research and teaching

    NARCIS (Netherlands)

    Bronkhorst, L.H.

    2013-01-01

    Throughout the literature, research and teaching are described as being fundamentally different; they are reported to rely on different norms to ascertain what counts as knowledge as well as what accepted ways of knowledge development are. In spite of this, it is generally assumed that teaching coul

  5. LiLEDDA: A Six-Step Forum-Based Netnographic Research Method for Nursing Science

    Directory of Open Access Journals (Sweden)

    MARTIN SALZMANN-ERIKSON

    2012-01-01

    Full Text Available Internet research methods in nursing science are less developed than in other sciences. We choose to present an approach to conducting nursing research on an internet-based forum. This paper presents LiLEDDA, a six-step forum-based netnographic research method for nursing science. The steps consist of: 1. Literature review and identification of the research question(s; 2. Locating the field(s online; 3. Ethical considerations; 4. Data gathering; 5. Data analysis and interpretation; and 6. Abstractions and trustworthiness. Traditional research approaches are limiting when studying non-normative and non-mainstream life-worlds and their cultures. We argue that it is timely to develop more up-to-date research methods and study designs applicable to nursing science that reflect social developments and human living conditions that tend to be increasingly online-based.

  6. Experimental research of the effects of different shields on power frequency electric field mitigation

    Directory of Open Access Journals (Sweden)

    Nahman Jovan

    2012-01-01

    Full Text Available The paper describes experimental research on the effects of different shields on power frequency electric field mitigation. This research was performed in order to determine those materials that may be used for electric field mitigation in cases where the reference level is exceeded. Using measured results, the value of the shielding factor has been calculated for all tested shields and the most efficient shields were determined.

  7. Folklore anecdote between memorata and fabulata: Field research of Serbs in Medina (Hungary

    Directory of Open Access Journals (Sweden)

    Ilić Marija

    2007-01-01

    Full Text Available This work is based on folklore material, which was gathered during ethno linguistic field research of Serbian traditional lexicon and spiritual culture in Medina village in Hungary in 2002. Folklore material is composed of the sayings by the informer Sava Sokic and primarily can be defined as a series of comical narrations. If we look upon these narrations as a genre of oral speech and within context of ethno linguistic interview, we can notice a complex structure of this oral genre. That is, this genre functions as a memorat with typical beginnings and met textual comments. On the other hand, it respects almost all genre norms, which are characteristic for folklore anecdote. Therefore, comic narrations of Save Sokic, and that are valid also for folklore anecdote in general, can be classified as borderline genre - between memorata and fabulata.

  8. How pluralistic is the research field on adult education? : Dominating bibliometrical trends, 2005-2012

    OpenAIRE

    Andreas Fejes; Erik Nylander

    2015-01-01

    What the field of adult education research is and how it can be described has been a debated issue over the decades. Several scholars argue that the field today is heterogeneous, borrowing theories and methods from a range of disciplines. In this article, we take such statements as a starting point for empirical analysis. In what ways could it be argued that the field is pluralistic rather than monolithic; heterogeneous rather than homogenous? Drawing on bibliographic data of the top cited ar...

  9. Research on the Vibration Serviceability of a Cable-stayed Footbridge Based on Field Measurement%基于实测响应的斜拉人行桥人致振动舒适度研究

    Institute of Scientific and Technical Information of China (English)

    陈波; 王鑫; 刘浩; 胡健; 张文龙; 黄雨田

    2013-01-01

    The vibration serviceability of a large span cable-stayed footbridge was actively investigated.The basic information of a real large span cable-stayed footbridge was firstly introduced.The analytical model of the footbridge was established based on finite element method and the dynamic properties are computed.The dynamic properties of the footbridge were measured subjected to ambient excitation.In addition,the dynamic responses of the footbridge under humaninduced loading were also tested.The vibration serviceability of the cable-stayed footbridge was evaluated in line with the British Standard BS5400.The made observations indicate that the dynamic responses of the footbridge is obvious and discomfort feeling can be observed to some extent.%研究了大跨轻柔斜拉人行桥人致振动舒适度问题.基于有限元方法建立了某大跨度斜拉人行桥的分析模型并进行了动力特性分析;进行了该桥在环境脉动激励作用下的动力特性实测和不同人行荷载作用下的动力响应测试;依据英国规范BS5400评价了该桥的振动舒适度状况.结果表明,该桥在人行荷载作用下存在较为显著的振动响应和一定程度的振动舒适度问题.

  10. Seeking New Bases for SLA Research: Looking to Cognitive Science.

    Science.gov (United States)

    Block, David

    1990-01-01

    Suggests that cognitive science, a field that draws on research in linguistics, psychology, anthropology, and computer science, might provide better explanations of student behavior in the classroom than mainstream second-language acquisition research. An attempt is made to show how research from cognitive science might offer explanations for what…

  11. The power of research exploration within education: lessons from an international field hydrology course

    Science.gov (United States)

    Abou Najm, M. R.; Stewart, R. D.; Rupp, D. E.; Selker, J. S.; Lane, J. W.; Casanova, F.; Arumí, J.; Rivera, D.

    2011-12-01

    Educating the next generation of scientists requires new educational methods and unconventional approaches to facilitate the interdisciplinary scholarship required to cope with fast-paced developments in the geosciences. We believe incorporation of field training with active research missions is an effective educational model. By participating in active research and open science dialogue, students are exposed to real-world examples of the principles and processes of complex systems in a manner that allows them to develop a deeper understanding of the subject. We find students are highly motivated by the knowledge that data they collect will advance the research mission; such an environment stokes their passions and imaginations and allows the students to explore the roots of their interest in geoscience. In this context, a two-week educational field course on hydrologic processes and measurements was integrated with ongoing research in Chile to understand the effect of soil shrinkage and swelling properties on watershed hydrologic response. Students witnessed the iterative process of field-experiment design and became part of science in the making. They experienced the complexity of field work and developed problem-solving skills through the myriad of challenges presented in the acquisition of field data in a remote area. All of these factors contributed to an atmosphere of creativity that led to an outstanding research and educational experience. We find the coupling of field training with active research to be extremely rewarding, and time- and cost-effective education in this fast-paced and cost-cautious age.

  12. Sound field reconstruction based on the acousto-optic effect

    DEFF Research Database (Denmark)

    Torras Rosell, Antoni; Barrera Figueroa, Salvador; Jacobsen, Finn

    2011-01-01

    Acoustic measurements are usually carried out with transducers that interact mechanically with the sound field under investigation. The goal of this work is to employ a completely different measurement principle, the determination of sound pressure based on the interaction between sound and light......, namely the acousto-optic effect. When sound propagates through a medium, it gives rise to pressure fluctuations that change the instantaneous density of the medium. Under such circumstances, the speed of light is not constant, but changed by the acoustic field. This acousto-optic interaction can...... be measured with a laser Doppler vibrometer; furthermore, it can be exploited to characterize an arbitrary sound field using tomographic techniques. This paper briefly reviews the fundamental principles governing the acousto-optic effect in air, and presents an investigation of the tomographic reconstruction...

  13. LPFG based fiber optic sensor for magnetic field measurement

    Science.gov (United States)

    Gouveia, Carlos A. J.; Coelho, Luís.; Franco, Marcos A. R.

    2017-04-01

    The design and modelling of a novel magnetic field sensor based on a long period fiber grating coated with a thin film of N doped ZnO is reported. The parameters of both, the grating and the thin film were carefully chosen to operate in the transition mode and near to the dispersion turning point. At this point, an LPFG shows its maximum sensitivity to external refractive index variations. The magnetic field induces variations in the coating refractive index, which changes the effective refractive index of the cladding mode and the consequent spectral response. In this work a sensitivity to the surrounding magnetic field of 2.9 nm/mT is reported with a maximum theoretical resolution of 2 μT.

  14. Perspective of International Research Hot Spot in the Field of Workplace Learning--Based on the Study of Literature from Seven Western Academic Journals Between 2005 and 2015%工作场所学习领域国际研究热点透视*--基于西方7本学术期刊文献(2005~2015)

    Institute of Scientific and Technical Information of China (English)

    张艳超; 黄健

    2016-01-01

    Workplace learning has become a new research territory of educational science in recent years. It has caused the wide attention from scholars both at home and abroad. With the help of Scopus database, based on the study of literature from seven academic journals between 2005 and 2015 in the West, the method of literature metrology, clustering analysis, mapping knowledge domain and so on have been used to do the data analysis and some results have been found. Firstly, the SCImago Journal Rank of these academic journals is generally low and the academic influence needs to be strengthened in the field of workplace learning. Secondly, the scholars have a clear gap between home and abroad concerning the research level and the achievements in this field. Actually, the United States, the Commonwealth and the Nordic countries have become the academic centers of international workplace learning research. Thirdly,"Human Resource Development"and"Workplace Learning"have become the two major mainstream research camps in the field of workplace learning, and the trend of their convergence and fusion is being strengthened. Fourthly, the characteristics of interdisciplinary research are obvious in the field of workplace learning. Interdisciplinary research from education, management, organization, psychology, sociology, etc. is benefit for academic innovation. Through the perspective of the international hot spot and development trend in the field of workplace learning, it can be expected that the studies of informal learning, gender, organizational learning, action learning and leadership development have important academic value and space to be explored in the future. It deserves the attention of scholars.%近年来工作场所学习领域已然成为教育科学研究的新疆域,引起了国内外学者的广泛关注。借助Scopus数据库,以西方工作场所学习领域7本学术期刊2005~2015年度收录的文献为研究样本,采用文献计量、聚类分析、

  15. Context-Based Assessment: Creating Opportunities for Resonance between Classroom Fields and Societal Fields

    Science.gov (United States)

    Bellocchi, Alberto; King, Donna T.; Ritchie, Stephen M.

    2016-01-01

    There is on-going international interest in the relationships between assessment instruments, students' understanding of science concepts and context-based curriculum approaches. This study extends earlier research showing that students can develop connections between contexts and concepts--called "fluid transitions"--when studying…

  16. Logging into the Field—Methodological Reflections on Ethnographic Research in a Pluri-Local and Computer-Mediated Field

    Directory of Open Access Journals (Sweden)

    Heike Mónika Greschke

    2007-09-01

    Full Text Available This article aims to introduce an ethnic group inhabiting a common virtual space in the World Wide Web (WWW, while being physically located in different socio-geographical contexts. Potentially global in its geographical extent, this social formation is constituted by means of interrelating virtual-global dimensions with physically grounded parts of the actors' lifeworlds. In addition, the communities' social life relies on specific communicative practices joining mediated forms of communication with co-presence based encounters. Ethnographic research in a pluri-local and computer-mediated field poses a set of problems which demand thorough reflection as well as a search for creative solutions. How can the boundaries of the field be determined? What does "being there" signify in such a case? Is it possible to enter the field while sitting at my own desk, just by visiting the respective site in the WWW, simply observing the communication going on without even being noticed by the subjects in the field? Or does "being in the field" imply that I ought to turn into a member of the studied community? Am I supposed to effectively live with the others for a while? And then, what can "living together" actually mean in that case? Will I learn enough about the field simply by participating in its virtual activities? Or do I have to account for the physically grounded dimensions of the actors' lifeworlds, as well? Ethnographic research in a pluri-local and computer-mediated field in practice raises a lot of questions regarding the ways of entering the field and being in the field. Some of them will be discussed in this paper by means of reflecting research experiences gained in the context of a recently concluded case study. URN: urn:nbn:de:0114-fqs0703321

  17. Arts-Based Research as an Unknowable Text.

    Science.gov (United States)

    Springgay, Stephanie

    2002-01-01

    In arts-based research, the mode of inquiry through an art form generates new insights that would not have been revealed through a traditional written format. Three sets of criteria for evaluating arts-based research are presented that privilege the written word. Additional criteria are offered for visual arts-based research. (Contains 22…

  18. Does Arts-Based Research Have a Future?

    Science.gov (United States)

    Eisner, Elliot

    2006-01-01

    This article focuses on the future of arts-based research in education. The author contends that there are several features that need to be taken into account if arts-based educational research is to have a future. First, arts-based educational research needs to have a cadre of scholars committed to its exploration--individuals who regard…

  19. Art-Based Evaluation in Research Education.

    Science.gov (United States)

    Julliard, Kell N.; Gujral, Jeetinder Kaur; Hamil, Sarah W.; Oswald, Elaine; Smyk, Amy; Testa, Nicole

    2000-01-01

    Study uses art to evaluate an all day seminar for graduate students on research methods, to explore students' feelings about research concepts, and to foster understanding of these concepts. Results suggest that the seminar was able to reduce most participants' anxiety about research without a loss of creativity and energy. (Author/GCP)

  20. Arts-based Research Processes in ECEC: Examples from Preparing and Conducting a Data Collection

    OpenAIRE

    Torill Vist

    2016-01-01

    In this methodological article, different concepts and possibilities related to how arts-based research processes can contribute in the early phases of ECEC research will be presented and discussed. Despite a setback of art subjects in Norwegian ECEC and early childhood teacher’s education, the field of arts still plays an important role, and is expected to be research-based. Thus, there should be a need for an aesthetical and arts-based dimension in researching ECEC, not only in the subject ...

  1. Phenomenography and Grounded Theory as Research Methods in Computing Education Research Field

    Science.gov (United States)

    Kinnunen, Paivi; Simon, Beth

    2012-01-01

    This paper discusses two qualitative research methods, phenomenography and grounded theory. We introduce both methods' data collection and analysis processes and the type or results you may get at the end by using examples from computing education research. We highlight some of the similarities and differences between the aim, data collection and…

  2. Phenomenography and Grounded Theory as Research Methods in Computing Education Research Field

    Science.gov (United States)

    Kinnunen, Paivi; Simon, Beth

    2012-01-01

    This paper discusses two qualitative research methods, phenomenography and grounded theory. We introduce both methods' data collection and analysis processes and the type or results you may get at the end by using examples from computing education research. We highlight some of the similarities and differences between the aim, data collection and…

  3. Action Research: An Approach to Student Work Based Learning.

    Science.gov (United States)

    Rowley, Jennifer

    2003-01-01

    Explains the application of action research to work-based learning, describing the action research cycle and meta learning. Outlines key processes for action research projects: keeping journals, managing dual roles of employee and researcher, managing politics and ethics. Offers suggestions for writing an action research dissertation. (SK)

  4. 基于共词分析法的我国翻转课堂研究现状分析%Analysis on the Present Status in the Field of the FliPPed Classroom Research in China Based on the Method of the Co-word Analysis

    Institute of Scientific and Technical Information of China (English)

    赵磊磊; 赵可云; 徐进; 芦佳莹

    2015-01-01

    With the help of the co-word analysis,the article carries out the quantitative research on the aca_demic literatures of CNKI in the flipped classroom field of China to find out the research topics of the flipped class_room filed,which are mainly about the experiment teaching that is based on the flipped classroom,the teacher-student role that is based on the background of the flipped classroom,the association between the flipped classroom and the education reform,the course design that is based on the horizon of the flipped classroom,the classroom teaching that is based on concept of the flipped classroom,the personalized learning under the teaching mode of the flipped classroom,the application of information technology in the teaching mode of the flipped classroom,and the ontology of the flipped classroom. Besides,the academic research in the domestic field of the flipped classroom need to be deepened and expanded.%利用共词分析法对中国知网所收录的我国翻转课堂相关学术文献进行量化研究,结果表明:国内翻转课堂领域的研究主题主要涵盖“基于翻转课堂的实验教学”“翻转课堂背景下的师生角色”“翻转课堂与教育变革的关联”“翻转课堂视域下的课程设计”“翻转课堂理念下的课堂教学”“翻转课堂教学模式下的个性化学习”“信息技术在翻转课堂教学模式中的应用”“翻转课堂的本体”等方面。国内翻转课堂学术研究仍需不断深化和拓展。

  5. Research and Application of Automation Testing Framework Based on Field-driven%基于领域驱动的自动化测试框架研究与应用

    Institute of Scientific and Technical Information of China (English)

    胡继东; 鞠炜刚

    2016-01-01

    As the delivery period of software products becomes shorter,the application scope of automation test becomes wider. In order to solve the problem of low efficiency and complexity in writing and maintaining automation test cases,an automation test framework is put forward based on domain-driven on the existing traditional test framework. The new framework describes test cases in domain language, creates model to the tested domain,guides design with the idea of modularization,adopts layered architecture,and designs and develops domain test library by using ODD. At the same time, the implementation procedure of domain-driven test is raised, which includes process and method of starting,modeling,design,development,test,version management and publishing. By adopting the domain-driven test framework,the system makes organization,design and development of test cases more efficient,and thus improves efficiency in devel-opment and maintenance of test cases. In this case,test cases become easy to understand,clear and concise,and satisfy quick changes re-quirements by using restructuring. Thus,the framework is widely deployed in telecommunication system tests and has achieved good re-sults.%随着软件产品的交付周期越来越短,自动化测试的应用范围更加广泛。为解决自动化测试用例编写维护复杂、效率低下的问题,在传统测试框架的基础上提出了一种基于领域驱动的自动化测试框架。用领域语言来描述测试用例,对被测领域进行领域建模,以组件化思想为指导,采用分层架构,用面向对象方法设计、开发了领域测试库,同时提出了领域驱动测试的实施流程,包括启动、建模、设计、开发、测试、版本管理和发布的过程、方法。通过采用领域驱动测试框架可以使得测试用例的组织、设计和开发更加有效,提高了测试用例的开发和维护效率,测试用例更加易于解性、清晰简洁,能够通过

  6. A Web-Based Information System for Field Data Management

    Science.gov (United States)

    Weng, Y. H.; Sun, F. S.

    2014-12-01

    A web-based field data management system has been designed and developed to allow field geologists to store, organize, manage, and share field data online. System requirements were analyzed and clearly defined first regarding what data are to be stored, who the potential users are, and what system functions are needed in order to deliver the right data in the right way to the right user. A 3-tiered architecture was adopted to create this secure, scalable system that consists of a web browser at the front end while a database at the back end and a functional logic server in the middle. Specifically, HTML, CSS, and JavaScript were used to implement the user interface in the front-end tier, the Apache web server runs PHP scripts, and MySQL to server is used for the back-end database. The system accepts various types of field information, including image, audio, video, numeric, and text. It allows users to select data and populate them on either Google Earth or Google Maps for the examination of the spatial relations. It also makes the sharing of field data easy by converting them into XML format that is both human-readable and machine-readable, and thus ready for reuse.

  7. [Sub-field imaging spectrometer design based on Offner structure].

    Science.gov (United States)

    Wu, Cong-Jun; Yan, Chang-Xiang; Liu, Wei; Dai, Hu

    2013-08-01

    To satisfy imaging spectrometers's miniaturization, lightweight and large field requirements in space application, the current optical design of imaging spectrometer with Offner structure was analyzed, and an simple method to design imaging spectrometer with concave grating based on current ways was given. Using the method offered, the sub-field imaging spectrometer with 400 km altitude, 0.4-1.0 microm wavelength range, 5 F-number of 720 mm focal length and 4.3 degrees total field was designed. Optical fiber was used to transfer the image in telescope's focal plane to three slits arranged in the same plane so as to achieve subfield. The CCD detector with 1 024 x 1 024 and 18 microm x 18 microm was used to receive the image of the three slits after dispersing. Using ZEMAX software optimization and tolerance analysis, the system can satisfy 5 nm spectrum resolution and 5 m field resolution, and the MTF is over 0.62 with 28 lp x mm(-1). The field of the system is almost 3 times that of similar instruments used in space probe.

  8. Resonant Magnetic Field Sensors Based On MEMS Technology

    Science.gov (United States)

    Herrera-May, Agustín L.; Aguilera-Cortés, Luz A.; García-Ramírez, Pedro J.; Manjarrez, Elías

    2009-01-01

    Microelectromechanical systems (MEMS) technology allows the integration of magnetic field sensors with electronic components, which presents important advantages such as small size, light weight, minimum power consumption, low cost, better sensitivity and high resolution. We present a discussion and review of resonant magnetic field sensors based on MEMS technology. In practice, these sensors exploit the Lorentz force in order to detect external magnetic fields through the displacement of resonant structures, which are measured with optical, capacitive, and piezoresistive sensing techniques. From these, the optical sensing presents immunity to electromagnetic interference (EMI) and reduces the read-out electronic complexity. Moreover, piezoresistive sensing requires an easy fabrication process as well as a standard packaging. A description of the operation mechanisms, advantages and drawbacks of each sensor is considered. MEMS magnetic field sensors are a potential alternative for numerous applications, including the automotive industry, military, medical, telecommunications, oceanographic, spatial, and environment science. In addition, future markets will need the development of several sensors on a single chip for measuring different parameters such as the magnetic field, pressure, temperature and acceleration. PMID:22408480

  9. Preparation research of Nano-SiC/Ni-P composite coating under a compound field

    Science.gov (United States)

    Zhou, H. Z.; Wang, W. H.; Gu, Y. Q.; Liu, R.; Zhao, M. L.

    2016-07-01

    In this paper, the preparation process of Ni-P-SiC composite coatings on 45 steel surfaces with the assistance of magnetic and ultrasound fields was researched. The influence of external field on the surface morphology and performance of the composite layer is also discussed. Experimental results showed that when prepared under magnetic and ultrasonic fields, composite layers are significantly more dense and uniform than coatings made without external fields. Nano-SiC particles, dispersed uniformly in the layer, significantly improve the hardness of the composite layer, and the composite layer under the external field had the highest hardness at 680 HV The external fields can also accelerate deposition and increase the thickness of the layer. Compared to layers processed without the assistance of external fields, the thickness of the layers increased by nearly ten µm.

  10. Experimental research on the longitudinal field generated by a tightly focused beam

    Institute of Scientific and Technical Information of China (English)

    Zhang Ming-Qian; Wang Jia; Tian Qian

    2013-01-01

    The longitudinal optical field is a peculiar physical phenomenon that is always involved with the domain of near-field optics.Due to its extraordinary properties,it has recently attracted increasing attention in research and application.In this1 work,the longitudinal fields generated by the evanescent illumination of tightly focused,different polarized hollow beams are investigated.The focused light fields are numerically simulated according to vector diffraction theory,and their vector analysis is also carried out.The longitudinal fields on the focal plane are demonstrated experimentally using tip-enhanced scanning near-field microscopy.The simulation and experimental results show that the tightly focused radially polarized beam is suited to generating a stronger and purer longitudinal optical field at the focus.

  11. Lamont-Doherty's Secondary School Field Research Program: Institutionalizing outreach to secondary school students at a soft-money research institute

    Science.gov (United States)

    Sambrotto, R.

    2015-12-01

    The Secondary School Field Research Program is a field and laboratory internship for high school students at the Lamont-Doherty Earth Observatory. Over the past 11 years it has grown into a significant program, engaging approximately 50 high school and college students each summer, most of them from ethnic and economic groups that are under-represented in the STEM fields. The internships are based on research-driven science questions on estuarine physics, chemistry, ecology and the paleo-environment. Field studies are linked to associated laboratory analyses whose results are reported by the students as a final project. For the past two years, we have focused on the transition to an institutional program, with sustainable funding and organizational structures. At a grant-driven institution whose mission is largely restricted to basic research, institutionalization has not been an easy task. To leverage scarce resources we have implemented a layered structure that relies on near-peer mentoring. So a typical research team might include a mix of new and more experienced high school students, a college student, a high school science teacher and a Lamont researcher as a mentor. Graduates of the program are employed to assist with administration. Knowledge and best practices diffuse through the organization in an organic, if not entirely structured, fashion. We have found that a key to long-term funding has been survival: as we have sustained a successful program and developed a model adapted to Lamont's unique environment, we have attracted longer term core financing on which grant-driven extensions can be built. The result is a highly flexible program that is student-centered in the context of a broader research culture connecting our participants with the advantages of working at a premier soft-money research institution.

  12. Exploring the use of Virtual Field Trips with elementary school teachers: A collaborative action research approach

    Science.gov (United States)

    Scott, Jeffrey Lance

    This research examines how elementary school teachers, when supported, use Virtual Field Trips (VFTs) to address the curricula in meaningful ways. I conducted a qualitative study with six teachers, in a collaborative action research context over a six month period. The teachers, five males and one female, all taught either grade five or six and utilized Virtual Field Trips within a variety of curricula areas including science, social studies, music and language arts. In addition, the thesis examines resulting integration of technology into the regular classroom program as a product of the utilization of Virtual Field Trips. The process of collaborative action research was applied as a means of personal and professional growth both for the participants and the researcher/facilitator. By the end of the research study, all participants had learned to integrate Virtual Field Trips into their classroom program, albeit with different levels of success and in different curricula areas. The development of attitudes, skills and knowledge for students and teachers alike was fostered through the participation in Virtual Field Trips. A common concern regarding the utilization of Virtual Field Trips was the time spent locating an appropriate site that met curricula expectations. Participation in the collaborative action research process allowed each teacher to grow professionally, personally and socially. Each participant strongly encouraged the utilization of a long term project with a common area of exploration as a means for positive professional development. Implications and recommendations for future research on the utilization of Virtual Field Trips, as well as the viability of collaborative action research to facilitate teacher development are presented.

  13. Conditional random field-based gesture recognition with depth information

    Science.gov (United States)

    Chung, Hyunsook; Yang, Hee-Deok

    2013-01-01

    Gesture recognition is useful for human-computer interaction. The difficulty of gesture recognition is that instances of gestures vary both in motion and shape in three-dimensional (3-D) space. We use depth information generated using Microsoft's Kinect in order to detect 3-D human body components and apply a threshold model with a conditional random field in order to recognize meaningful gestures using continuous motion information. Body gesture recognition is achieved through a framework consisting of two steps. First, a human subject is described by a set of features, encoding the angular relationship between body components in 3-D space. Second, a feature vector is recognized using a threshold model with a conditional random field. In order to show the performance of the proposed method, we use a public data set, the Microsoft Research Cambridge-12 Kinect gesture database. The experimental results demonstrate that the proposed method can efficiently and effectively recognize body gestures automatically.

  14. Geodynamics branch data base for main magnetic field analysis

    Science.gov (United States)

    Langel, Robert A.; Baldwin, R. T.

    1991-01-01

    The data sets used in geomagnetic field modeling at GSFC are described. Data are measured and obtained from a variety of information and sources. For clarity, data sets from different sources are categorized and processed separately. The data base is composed of magnetic observatory data, surface data, high quality aeromagnetic, high quality total intensity marine data, satellite data, and repeat data. These individual data categories are described in detail in a series of notebooks in the Geodynamics Branch, GSFC. This catalog reviews the original data sets, the processing history, and the final data sets available for each individual category of the data base and is to be used as a reference manual for the notebooks. Each data type used in geomagnetic field modeling has varying levels of complexity requiring specialized processing routines for satellite and observatory data and two general routines for processing aeromagnetic, marine, land survey, and repeat data.

  15. Detailed field test of yaw-based wake steering

    Science.gov (United States)

    Fleming, P.; Churchfield, M.; Scholbrock, A.; Clifton, A.; Schreck, S.; Johnson, K.; Wright, A.; Gebraad, P.; Annoni, J.; Naughton, B.; Berg, J.; Herges, T.; White, J.; Mikkelsen, T.; Sjöholm, M.; Angelou, N.

    2016-09-01

    This paper describes a detailed field-test campaign to investigate yaw-based wake steering. In yaw-based wake steering, an upstream turbine intentionally misaligns its yaw with respect to the inflow to deflect its wake away from a downstream turbine, with the goal of increasing total power production. In the first phase, a nacelle-mounted scanning lidar was used to verify wake deflection of a misaligned turbine and calibrate wake deflection models. In the second phase, these models were used within a yaw controller to achieve a desired wake deflection. This paper details the experimental design and setup. All data collected as part of this field experiment will be archived and made available to the public via the U.S. Department of Energy's Atmosphere to Electrons Data Archive and Portal.

  16. ASCO's Community Research Forum: addressing challenges of community-based research from the grass roots.

    Science.gov (United States)

    Robert, Nicholas; Lilenbaum, Rogerio; Hurley, Patricia

    2014-01-01

    ASCO's Community Research Forum is a solution-oriented venue for community research sites to overcome barriers to conducting clinical trials. The key objectives of the Forum are to (1) convene community-based researchers to identify challenges to conducting research that ASCO can address, (2) develop solution-oriented projects to address these challenges to facilitate clinical trial participation in community research settings, and (3) shape ASCO programs and policies to support members engaged in community research. The Community Research Forum holds an annual in-person meeting that convenes physician investigators, research administrators, research nurses, and clinical research associates from community-based research programs and practices. To meet identified needs, the Community Research Forum has developed the ASCO Clinical Trial Workload Assessment Tool and the ASCO Research Program Quality Assessment Tool. Both of these tools will be available to the public in 2014. The Forum is currently exploring the concept and potential metrics of a research certification program to formally assess community-based research programs, and to identify gaps and areas to improve the program in order to meet quality standards. The Community Research Forum's website aims to serve as a go-to resource for community-based physician investigators and research staff. The Community Research Forum will continue to provide a forum for community-based researchers to network, share challenges, and develop initiatives that provide solutions and facilitate the conduct of clinical trials.

  17. 2012 North Plains research field 12-200 limited irrigation corn production study

    Science.gov (United States)

    2012 represented the third sequential year of research regarding the limited irrigation 12-200 corn production assessment study at the North Plains Research Field (NPRF) with the yield results being improved from that of the 2011 season but less than of the 2010 season. The study's purpose was to ev...

  18. Constituting the Field: An Essay on Harry Torrance's "Qualitative Research Methods in Education"

    Science.gov (United States)

    Dimitriadis, Greg

    2011-01-01

    This article critically explores Harry Torrance's four-volume edited collection "Qualitative Research Methods in Education." The author argues that this text is an important intervention in the constitution of a meta-discourse on qualitative research today. Torrance pays particular attention to the field of education, providing much needed…

  19. Codependency: A concomitant field of interest in research into the phenomenon caring

    Directory of Open Access Journals (Sweden)

    D. van der Wal

    1996-05-01

    Full Text Available The growing popularity of caring is evident throughout the nursing profession. Research into the phenomenon caring, however, necessitates that caring as an ethic be distinguished from pseudo caring actions and experiences. Codependence and codependency are proposed as being of a pseudo-caring nature. Research interest into this field of study needs to be kindled.

  20. Codependency: a concomitant field of interest in research into the phenomenon caring.

    Science.gov (United States)

    van der Wal, D

    1996-12-01

    The growing popularity of caring is evident throughout the nursing profession. Research into the phenomenon caring, however, necessitates that caring as an ethic be distinguished from pseudo caring actions and experiences. Codependence and codependency are proposed as being of a pseudo-caring nature. Research interest into this field of study needs to be kindled.

  1. Context and Complexity of International Entrepreneurship as a Field of Research

    NARCIS (Netherlands)

    Cesinger, B.

    2013-01-01

    International Entrepreneurship has become a focal point of interest and an important field of research for theory building in International Business and Entrepreneurship. Therein it pertains to the complexity of research issues addressing: first, small and larger, young and more established firms,

  2. Constituting the Field: An Essay on Harry Torrance's "Qualitative Research Methods in Education"

    Science.gov (United States)

    Dimitriadis, Greg

    2011-01-01

    This article critically explores Harry Torrance's four-volume edited collection "Qualitative Research Methods in Education." The author argues that this text is an important intervention in the constitution of a meta-discourse on qualitative research today. Torrance pays particular attention to the field of education, providing much needed…

  3. Context and Complexity of International Entrepreneurship as a Field of Research

    NARCIS (Netherlands)

    Cesinger, B.

    2013-01-01

    International Entrepreneurship has become a focal point of interest and an important field of research for theory building in International Business and Entrepreneurship. Therein it pertains to the complexity of research issues addressing: first, small and larger, young and more established firms, e

  4. Sustainability Education in Early Childhood: An Updated Review of Research in the Field

    Science.gov (United States)

    Somerville, Margaret; Williams, Carolyn

    2015-01-01

    Sustainability education is increasingly practiced in early childhood, but a previous review of the literature suggests that there is little empirical research to provide the necessary foundation and critique. The current paper addresses the question of whether there has been an increase in empirical research in the field since this review, and if…

  5. Research Protocol: Collections Related to Synthetic Turf Fields with Crumb Rubber Infill

    Science.gov (United States)

    The “Federal Research Action Plan on Recycled Tire Crumb Used on Playing Fields and Playgrounds” (referred to subsequently as the Federal Research Action Plan or FRAP) was finalized in February 2016. The U.S. EPA and CDC/ATSDR, in collaboration with CPSC, have prepare...

  6. A Decade of Field Changing Atmospheric Aerosol Research: Outcomes of EPA’s STAR Program

    Science.gov (United States)

    Conference: Gordon Research Conference in Atmospheric Chemistry, July 28 – August 2, 2013, VermontPresentation Type: PosterTitle: An Analysis of EPA’s STAR Program and a Decade of Field Changing Research in Atmospheric AerosolsAuthors: Kristina M. Wagstrom1,2, Sherri ...

  7. Analysis of worldwide research in the field of cybernetics during 1997-2011.

    Science.gov (United States)

    Singh, Virender; Perdigones, Alicia; García, José Luis; Cañas-Guerrero, Ignacio; Mazarrón, Fernando R

    2014-12-01

    The study provides an overview of the research activity carried out in the field of cybernetics. To do so, all research papers from 1997 to 2011 (16,445 research papers) under the category of "Computer Science, Cybernetics" of Web of Science have been processed using our in-house software which is developed specifically for this purpose. Among its multiple capabilities, this software analyses individual and compound keywords, quantifies productivity taking into account the work distribution, estimates the impact of each article and determines the collaborations established at different scales. Keywords analysis identifies the evolution of the most important research topics in the field of cybernetics and their specificity in biological aspects, as well as the research topics with lesser interest. The analysis of productivity, impact and collaborations provides a framework to assess research activity in a specific and realistic context. The geographical and institutional distribution of publications reveals the leading countries and research centres, analysing their relation to main research journals. Moreover, collaborations analysis reveals great differences in terms of internationalization and complexity of research networks. The results of this study may be very useful for the characterization and the decisions made by research in the field of cybernetics.

  8. Near-field acoustic imaging based on Laplacian sparsity

    DEFF Research Database (Denmark)

    Fernandez Grande, Efren; Daudet, Laurent

    2016-01-01

    We present a sound source identification method for near-field acoustic imaging of extended sources. The methodology is based on a wave superposition method (or equivalent source method) that promotes solutions with sparse higher order spatial derivatives. Instead of promoting direct sparsity......, and the validity of the wave extrapolation used for the reconstruction is examined. It is shown that this methodology can overcome conventional limits of spatial sampling, and is therefore valid for wide-band acoustic imaging of extended sources....

  9. Ultraviolet refractometry using field-based light scattering spectroscopy

    OpenAIRE

    2009-01-01

    Accurate refractive index measurement in the deep ultraviolet (UV) range is important for the separate quantification of biomolecules such as proteins and DNA in biology. This task is demanding and has not been fully exploited so far. Here we report a new method of measuring refractive index using field-based light scattering spectroscopy, which is applicable to any wavelength range and suitable for both solutions and homogenous objects with well-defined shape such as microspheres. The angula...

  10. A historical review and bibliometric analysis of research on lead in drinking water field from 1991 to 2007

    Energy Technology Data Exchange (ETDEWEB)

    Hu, Jie; Ma, Yuwei [Faculty of Civil Engineering and Geosciences, Delft University of Technology (Netherlands); Zhang, Liang [Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430077 (China); Gan, Fuxing [School of Resource and Environmental Science, Wuhan University, Wuhan 430079 (China); Ho, Yuh-Shan, E-mail: ysho@asia.edu.tw [Water Research Centre, Asia University, Taichung 41354, Taiwan (China); Department of Public Health, China Medical University, Taichung 40402, Taiwan (China)

    2010-03-01

    A bibliometric analysis based on Science Citation Index (SCI) published by Institute of Scientific Information (ISI) was carried out to identify the global research related to lead in drinking water field from 1991 to 2007 and to improve the understanding of research trends in the same period. The results from this analysis indicate that there have been an increasing number of annual publications mainly during two periods: from 1992 to 1997 and from 2004 to 2007. United States produced 37% of all pertinent articles followed by India with 8.0% and Canada with 4.8%. Science of the Total Environment published the most articles followed by Journal American Water Works Association and Toxicology. Summary of the most frequently used keywords are also provided. 'Cadmium' was the most popular author keyword in the 17 years. Furthermore based on bibliometric results four research aspects were summarized in this paper and the historical research review was also presented.

  11. A historical review and bibliometric analysis of research on lead in drinking water field from 1991 to 2007.

    Science.gov (United States)

    Hu, Jie; Ma, Yuwei; Zhang, Liang; Gan, Fuxing; Ho, Yuh-Shan

    2010-03-01

    A bibliometric analysis based on Science Citation Index (SCI) published by Institute of Scientific Information (ISI) was carried out to identify the global research related to lead in drinking water field from 1991 to 2007 and to improve the understanding of research trends in the same period. The results from this analysis indicate that there have been an increasing number of annual publications mainly during two periods: from 1992 to 1997 and from 2004 to 2007. United States produced 37% of all pertinent articles followed by India with 8.0% and Canada with 4.8%. Science of the Total Environment published the most articles followed by Journal American Water Works Association and Toxicology. Summary of the most frequently used keywords are also provided. "Cadmium" was the most popular author keyword in the 17 years. Furthermore based on bibliometric results four research aspects were summarized in this paper and the historical research review was also presented.

  12. Conducting field research in subsistence markets, with an application to market orientation in the context of Ethiopian pastoralists

    NARCIS (Netherlands)

    Ingenbleek, P.T.M.; Tessema, W.K.; Trijp, van J.C.M.

    2013-01-01

    The typical characteristics of subsistence markets challenge not only the generalizability of marketing theories but also the applicability and validity of the field researchmethods generally practiced by marketing researchers. This article discusses challenges inherent to field research in subsiste

  13. A Qualitative Research on Educational Fields on which Universities Positioned Themselves in Turkey

    Directory of Open Access Journals (Sweden)

    Kahraman ÇATI

    2016-10-01

    Full Text Available The aim of this study is to determine the educational fields on which universities position themselves in Turkey. The population of the research consists of state and private universities in Turkey. In this study, qualitative research design was used and data were collected by document review technique.The research data was obtained by analyzing introductory videos of universities in their websites. In this context, 90 introductory videos of universities were collected. The data obtained was analyzed with descriptive analysis technique. the result of the study showed that 49 out of 90 universities positioned themselves in the field of education. Medical, engineering, and economics and administrative sciences were mostly emphasized educational fields. The result of the study led to the conclusion, 41 universities analyzing introductory videos did not position themselves in the field of education.

  14. Methodological bases of innovative training of specialists in nanotechnology field

    Directory of Open Access Journals (Sweden)

    FIGOVSKY Oleg Lvovich

    2016-10-01

    Full Text Available The performance of innovative training system aimed at highly intellectual specialists in the area of nanotechnologies for Kazakhstan’s economy demands establishment and development of nanotechnological market in the country, teaching of innovative engineering combined with consistent research, integration of trained specialists with latest technologies and sciences at the international level. Methodological aspects of training competitive specialists for nanotechnological field are specific. The paper presents methodological principles of innovative training of specialists for science-intensive industry that were realized according to grant given by the Ministry of Education and Science of the Republic of Kazakhstan.

  15. A researcher at EMERJ: negotiations of a field research at an institutionalized context

    Directory of Open Access Journals (Sweden)

    Fernando Fontainha

    2015-01-01

    Full Text Available This article describes the participant observation of classes performed at the Rio de Janeiro's Judiciary School. During the year of 2009, I have performed direct observations of several preparatory courses – for the regional Judicature entrance examination – which was taken as an opportunity to reflect on the place and role of the researcher and about the social dynamics that makes him a member of the studied group. I also describe how my position as a Brazilian PhD candidate in France was mobilized for my empirical research. Finally, several situations revealing how students and professors inserted me in their classes’ dynamics are analyzed. The objective of this article is to discuss the limits and possibilities of participant observation, through the social construction of the researcher as a subject of his own research.

  16. Field and laboratory notes on instream research - Research and Development of New Marking and Monitoring Technologies

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This project addresses how to expand the current fish-tracking technologies to enable the fisheries community to successfully carry out the actions, research, and...

  17. Detailed field test of yaw-based wake steering

    DEFF Research Database (Denmark)

    Fleming, P.; Churchfield, M.; Scholbrock, A.

    2016-01-01

    This paper describes a detailed field-test campaign to investigate yaw-based wake steering. In yaw-based wake steering, an upstream turbine intentionally misaligns its yaw with respect to the inflow to deflect its wake away from a downstream turbine, with the goal of increasing total power...... production. In the first phase, a nacelle-mounted scanning lidar was used to verify wake deflection of a misaligned turbine and calibrate wake deflection models. In the second phase, these models were used within a yaw controller to achieve a desired wake deflection. This paper details the experimental...

  18. Field experiments on solar geoengineering: report of a workshop exploring a representative research portfolio.

    Science.gov (United States)

    Keith, David W; Duren, Riley; MacMartin, Douglas G

    2014-12-28

    We summarize a portfolio of possible field experiments on solar radiation management (SRM) and related technologies. The portfolio is intended to support analysis of potential field research related to SRM including discussions about the overall merit and risk of such research as well as mechanisms for governing such research and assessments of observational needs. The proposals were generated with contributions from leading researchers at a workshop held in March 2014 at which the proposals were critically reviewed. The proposed research dealt with three major classes of SRM proposals: marine cloud brightening, stratospheric aerosols and cirrus cloud manipulation. The proposals are summarized here along with an analysis exploring variables such as space and time scale, risk and radiative forcing. Possible gaps, biases and cross-cutting considerations are discussed. Finally, suggestions for plausible next steps in the development of a systematic research programme are presented.

  19. Translating Faith: Field Narratives as a Means of Dialogue in Collaborative Ethnographic Research

    Directory of Open Access Journals (Sweden)

    Eve Gregory PhD

    2012-07-01

    Full Text Available This article presents research from a collaborative ethnography in four faith settings in London, UK. In particular, we show how a group of researchers from diverse cultures teach and learn from each other through the use of field narratives. After outlining a sociocultural approach to learning and discussing how faith situates itself within this frame, we show ways in which field narratives provide a bridge between the past, present and future of cultural events and practices and allow a polyphonic gaze by different researchers describing the same setting. We show how researchers learn to reflect upon their own research site, compare it with those of others, and, ultimately, become more aware of their own. This process is iterative and dialogic, which enriches not only the knowledge of the researchers themselves but also provides a mosaic of different interpretations to a wider interested audience.

  20. Guidance for the implementation of Market Research fundamentals at a Department of Defense Field Contracting Activity

    OpenAIRE

    McCormack, James Andrew

    1997-01-01

    Approved for public release; distribution is unlimited As a Federally mandated requirement, Market Research within the Federal Acquisition arena has made little progress since its inception well over a decade ago. It is the researcher's belief that the slow progress realized in the area of Market Research is in par due to Department of Defense Field Contracting Activities not really understanding how to incorporate the process into their existing routine and what skills are required of the...

  1. Improving Field-Based Experimental Research to Compliment Contemporary Management

    Science.gov (United States)

    Rangeland management has long been described as both a science and an art (Stoddart et al. 1975). Certainly, the management of rangeland resources, especially during the last half of the 20th century, can be characterized as practices commonly informed by science. There are a number of management...

  2. Making Theory Come Alive through Practice-based Design Research

    DEFF Research Database (Denmark)

    Markussen, Thomas; Knutz, Eva; Rind Christensen, Poul

    2011-01-01

    The aim of this paper is to demonstrate how practice-based design research is able not only to challenge, but also to push toward further development of some of the basic assumpstions in emotion theories as used within design research. In so doing, we wish to increase knolwedge on a central...... epistemological question for design research, namely how practice-based design research can be a vehicle for the construction of new theory for design research....

  3. Social network analysis of Iranian researchers in the field of violence

    Institute of Scientific and Technical Information of China (English)

    Payman Salamati; Faramarz Soheili

    2016-01-01

    Purpose:The social network analysis (SNA) is a paradigm for analyzing structural patterns in social relations,testing knowledge sharing process and identifying bottlenecks of information flow.The purpose of this study was to determine the status of research in the field of violence in Iran using SNA.Methods:Research population included all the papers with at least one Iranian affiliation published in violence field indexed in SCIE,PubMed and Scopus databases.The co-word maps,co-authorship network and structural holes were drawn using related software.In the next step,the active authors and some measures of our network including degree centrality (DC),closeness,eigenvector,betweeness,density,diameter,compactness and size of the main component were assessed.Likewise,the trend of the published articles was evaluated based on the number of documents and their citations from 1972 to 2014.Results:Five hundred and seventy one records were obtained.The five main clusters and hot spots were mental health,violence,war,psychiatric disorders and suicide.The co-authorship network was complex,tangled and scale free.The top nine authors with cut point role and top ten active authors were identified.The mean (standard deviation) of normalized DC,closeness,eigenvector and betweeness were 0.449 (0.805),0.609 (0.214),2.373 (7.353) and 0.338 (1.122),respectively.The density,diameter and mean compactness of our co-authorship network were 0.0494,3.955 and 0.125,respectively.The main component consisted of 216 nodes that formed 17% of total size of the network.Both the number of the documents and their citations has increased in the field of violence in the recent years.Conclusion:Although the number of the documents has recently increased in the field of violence,the information flow is slow and there are not many relations among the authors in the network.However,the active authors have ability to influence the flow of knowledge within the network.

  4. Research on countermeasures to global environment change in the field of urban planning

    Energy Technology Data Exchange (ETDEWEB)

    Kawanaka, Takashi [Building Research Inst., Tsukuba-shi, Ibaraki (Japan)

    1993-12-31

    There are a lot of research themes in the field of urban planning and related fields as mitigation of global environment change. Main theme is reduction method of CO{sub 2} gas emission as a countermeasure against global warming. Some groups research on estimation of CO{sub 2} emission caused by construction activities both in building engineering and civil engineering and also on evaluation of countermeasures. They investigate reduction of CO{sub 2} emission by fossil fuel combustion and by building materials (cement, steel and so on) production process. But we cannot use data fitted to a spatial scale of urban planning. Many researches are focused on nation wide analysis. We, BRI, make a study of {open_quotes}Research on CO{sub 2} Emission in Urban Development and the Control Technologies{close_quotes} as will be seen later at 2. (2). There are two ways of research to reduce CO{sub 2} emission caused by daily activities to urban planning field. One is research on positive utilizing of natural environment in urban areas without depending to energy consuming artificial facilities. There is a research on mitigation of heat island phenomenon for instance. The other ways are research on improvement of energy consumption effect and on reusing of wasted energy In energy consuming type urban space for instance. There s a research on promoting District Heating and Cooling (DHC) and cogeneration.

  5. Research progress of laser welding process dynamic monitoring technology based on plasma characteristics signal

    Directory of Open Access Journals (Sweden)

    Teng WANG

    2017-02-01

    Full Text Available During the high-power laser welding process, plasmas are induced by the evaporation of metal under laser radiation, which can affect the coupling of laser energy and the workpiece, and ultimately impact on the reliability of laser welding quality and process directly. The research of laser-induced plasma is a focus in high-power deep penetration welding field, which provides a promising research area for realizing the automation of welding process quality inspection. In recent years, the research of laser welding process dynamic monitoring technology based on plasma characteristics is mainly in two aspects, namely the research of plasma signal detection and the research of laser welding process modeling. The laser-induced plasma in the laser welding is introduced, and the related research of laser welding process dynamic monitoring technology based on plasma characteristics at home and abroad is analyzed. The current problems in the field are summarized, and the future development trend is put forward.

  6. A study on some optical illusions based upon the theory of inducing field.

    Science.gov (United States)

    Ge, Sheng; Saito, Takashi; Wu, Jing-Long; Iramina, K

    2006-01-01

    The study of optical illusion is an important method to elucidate the mechanism of visual perception. However, many details about the cause of optical illusions are still unclear. In this research, based on the characteristic of the physiological structure of the retina, we proposed an on-center receptive field model of the retina. Using this model, we simulated the distributions of the inducing field of some visual stimulus. Comparing to the past studies' results, the validity of the proposed model was proofed. Furthermore, we simulated the distributions of the inducing field of some typical illusions. The simulation results can explain these illusion phenomenon rationally. Therefore, it suggested that some of illusions are probably engendered by the distributions of the inducing field in the retina which generated by the illusions stimuli. The practicality of the proposed model was also verified.

  7. SEMICONDUCTOR DEVICES MEMS magnetic field sensor based on silicon bridge structure

    Science.gov (United States)

    Guangtao, Du; Xiangdong, Chen; Qibin, Lin; Hui, Li; Huihui, Guo

    2010-10-01

    A MEMS piezoresistive magnetic field sensor based on a silicon bridge structure has been simulated and tested. The sensor consists of a silicon sensitivity diaphragm embedded with a piezoresistive Wheatstone bridge, and a ferromagnetic magnet adhered to the sensitivity diaphragm. When the sensor is subjected to an external magnetic field, the magnetic force bends the silicon sensitivity diaphragm, producing stress and resistors change of the Wheatstone bridge and the output voltage of the sensor. Good agreement is observed between the theory and measurement behavior of the magnetic field sensor. Experimental results demonstrate that the maximum sensitivity and minimum resolution are 48 m V/T and 160 μT, respectively, making this device suitable for strong magnetic field measurement. Research results indicate that the sensor repeatability and dynamic response time are about 0.66% and 150 ms, respectively.

  8. Direct magnetic field estimation based on echo planar raw data.

    Science.gov (United States)

    Testud, Frederik; Splitthoff, Daniel Nicolas; Speck, Oliver; Hennig, Jürgen; Zaitsev, Maxim

    2010-07-01

    Gradient recalled echo echo planar imaging is widely used in functional magnetic resonance imaging. The fast data acquisition is, however, very sensitive to field inhomogeneities which manifest themselves as artifacts in the images. Typically used correction methods have the common deficit that the data for the correction are acquired only once at the beginning of the experiment, assuming the field inhomogeneity distribution B(0) does not change over the course of the experiment. In this paper, methods to extract the magnetic field distribution from the acquired k-space data or from the reconstructed phase image of a gradient echo planar sequence are compared and extended. A common derivation for the presented approaches provides a solid theoretical basis, enables a fair comparison and demonstrates the equivalence of the k-space and the image phase based approaches. The image phase analysis is extended here to calculate the local gradient in the readout direction and improvements are introduced to the echo shift analysis, referred to here as "k-space filtering analysis." The described methods are compared to experimentally acquired B(0) maps in phantoms and in vivo. The k-space filtering analysis presented in this work demonstrated to be the most sensitive method to detect field inhomogeneities.

  9. ECG-based gating in ultra high field cardiovascular magnetic resonance using an independent component analysis approach

    OpenAIRE

    Krug, Johannes W; Rose, Georg; Clifford, Gari D.; Oster, Julien

    2013-01-01

    Background In Cardiovascular Magnetic Resonance (CMR), the synchronization of image acquisition with heart motion is performed in clinical practice by processing the electrocardiogram (ECG). The ECG-based synchronization is well established for MR scanners with magnetic fields up to 3 T. However, this technique is prone to errors in ultra high field environments, e.g. in 7 T MR scanners as used in research applications. The high magnetic fields cause severe magnetohydrodynamic (MHD) effects w...

  10. Research of photolithography technology based on surface plasmon

    Institute of Scientific and Technical Information of China (English)

    Li Hai-Hua; Chen Jian; Wang Qing-Kang

    2010-01-01

    This paper demonstrates a new process of the photolithography technology,used to fabricate simply fine patterns,by employing surface plasmon character.The sub-wavelength periodic silica structures with uniform silver film are used as the exposure mask.According to the traditional semiconductor process,the grating structures are fabricated at exposing wavelength of 436 nm.At the same time,it provides additional and quantitative support of this technique based on the finite-difference time-domain method.The results of the research show that surface plasmon characteristics of metals can be used to increase the optical field energy distribution differences through the silica structures with silver film,which directly impact on the exposure of following photosensitive layer in different regions.

  11. Video Game-Based Methodology for Business Research

    Science.gov (United States)

    Lawson, Larry L.; Lawson, Catherine L.

    2010-01-01

    Experimental research in business and economics has exploded in recent years in both laboratory and field settings. The generality of findings from field experiments is limited by the specificity of the experimental environment. Laboratory studies, on the other hand, are criticized for being devoid of the contextual cues that may indicate to…

  12. Chip-based wide field-of-view nanoscopy

    Science.gov (United States)

    Diekmann, Robin; Helle, Øystein I.; Øie, Cristina I.; McCourt, Peter; Huser, Thomas R.; Schüttpelz, Mark; Ahluwalia, Balpreet S.

    2017-04-01

    Present optical nanoscopy techniques use a complex microscope for imaging and a simple glass slide to hold the sample. Here, we demonstrate the inverse: the use of a complex, but mass-producible optical chip, which hosts the sample and provides a waveguide for the illumination source, and a standard low-cost microscope to acquire super-resolved images via two different approaches. Waveguides composed of a material with high refractive-index contrast provide a strong evanescent field that is used for single-molecule switching and fluorescence excitation, thus enabling chip-based single-molecule localization microscopy. Additionally, multimode interference patterns induce spatial fluorescence intensity variations that enable fluctuation-based super-resolution imaging. As chip-based nanoscopy separates the illumination and detection light paths, total-internal-reflection fluorescence excitation is possible over a large field of view, with up to 0.5 mm × 0.5 mm being demonstrated. Using multicolour chip-based nanoscopy, we visualize fenestrations in liver sinusoidal endothelial cells.

  13. 2D Vector Field Simplification Based on Robustness

    KAUST Repository

    Skraba, Primoz

    2014-03-01

    Vector field simplification aims to reduce the complexity of the flow by removing features in order of their relevance and importance, to reveal prominent behavior and obtain a compact representation for interpretation. Most existing simplification techniques based on the topological skeleton successively remove pairs of critical points connected by separatrices, using distance or area-based relevance measures. These methods rely on the stable extraction of the topological skeleton, which can be difficult due to instability in numerical integration, especially when processing highly rotational flows. These geometric metrics do not consider the flow magnitude, an important physical property of the flow. In this paper, we propose a novel simplification scheme derived from the recently introduced topological notion of robustness, which provides a complementary view on flow structure compared to the traditional topological-skeleton-based approaches. Robustness enables the pruning of sets of critical points according to a quantitative measure of their stability, that is, the minimum amount of vector field perturbation required to remove them. This leads to a hierarchical simplification scheme that encodes flow magnitude in its perturbation metric. Our novel simplification algorithm is based on degree theory, has fewer boundary restrictions, and so can handle more general cases. Finally, we provide an implementation under the piecewise-linear setting and apply it to both synthetic and real-world datasets. © 2014 IEEE.

  14. Lightning-based propagation of convective rain fields

    Directory of Open Access Journals (Sweden)

    S. Dietrich

    2011-05-01

    Full Text Available This paper describes a new multi-sensor approach for continuously monitoring convective rain cells. It exploits lightning data from surface networks to propagate rain fields estimated from multi-frequency brightness temperature measurements taken by the AMSU/MHS microwave radiometers onboard NOAA/EUMETSAT low Earth orbiting operational satellites. Specifically, the method allows inferring the development (movement, morphology and intensity of convective rain cells from the spatial and temporal distribution of lightning strokes following any observation by a satellite-borne microwave radiometer. Obviously, this is particularly attractive for real-time operational purposes, due to the sporadic nature of the low Earth orbiting satellite measurements and the continuous availability of ground-based lightning measurements – as is the case in most of the Mediterranean region. A preliminary assessment of the lightning-based rainfall propagation algorithm has been successfully made by using two pairs of consecutive AMSU observations, in conjunction with lightning measurements from the ZEUS network, for two convective events. Specifically, we show that the evolving rain fields, which are estimated by applying the algorithm to the satellite-based rainfall estimates for the first AMSU overpass, show an overall agreement with the satellite-based rainfall estimates for the second AMSU overpass.

  15. The Design and Implementation of Indoor Localization System Using Magnetic Field Based on Smartphone

    Science.gov (United States)

    Liu, J.; Jiang, C.; Shi, Z.

    2017-09-01

    Sufficient signal nodes are mostly required to implement indoor localization in mainstream research. Magnetic field take advantage of high precision, stable and reliability, and the reception of magnetic field signals is reliable and uncomplicated, it could be realized by geomagnetic sensor on smartphone, without external device. After the study of indoor positioning technologies, choose the geomagnetic field data as fingerprints to design an indoor localization system based on smartphone. A localization algorithm that appropriate geomagnetic matching is designed, and present filtering algorithm and algorithm for coordinate conversion. With the implement of plot geomagnetic fingerprints, the indoor positioning of smartphone without depending on external devices can be achieved. Finally, an indoor positioning system which is based on Android platform is successfully designed, through the experiments, proved the capability and effectiveness of indoor localization algorithm.

  16. Research on energy use of field plants; Peltokasvien energiakaeyttoeae koskeva tutkimus

    Energy Technology Data Exchange (ETDEWEB)

    Tauriainen, J. [Commission of Agricultural Research, Helsinki (Finland). Finnish Ministry of Agriculture and Forestry

    1996-12-31

    Production of energy plants on set aside areas of peat production has risen to a subject of discussions during past few years. The field area becoming useless has been estimated to be, before the EU-membership, hundreds of thousands of hectares, 500 000 - 800 000 ha. Alternate usage will be needed for the set aside field areas because the profitability of plant cultivation is diminishing remarkable, and new possibilities for additional income are sought in Finnish farms. Research on field biomasses started in the national Bioenergy Research Programme in 1995. The number of projects was five, funded mainly by the Finnish Ministry of Agriculture and Forestry. The projects carried out in 1995 were: (1) Demonstration of the cultivation of Rape and Reed canary grass at present oil mills to fuel-oil, paper fibers and flash-pyrolysis oil as a large non-food production; (2) Cultivation of energy plants at peat production areas and the applicability of the bioenergy for different purposes; (3) Production of biomass in fields and the utilization of it for energy production; (4) Fractionation of different parts of the field plants and the development of the sorting technologies; and (5) Upgraded fuel from reed canary grass (an international task of the EU/AIR programme). In addition to these, the Agro-fiber research, funded totally by the Ministry of Agriculture and Forestry, will serve the purposes of the energy sector. The research is concentrated on the investigation of the fundamentals of the pulping applications of the field biomasses

  17. Chemical Atmosphere-Snow-Sea Ice Interactions: defining future research in the field, lab and modeling

    Science.gov (United States)

    Frey, Markus

    2015-04-01

    The air-snow-sea ice system plays an important role in the global cycling of nitrogen, halogens, trace metals or carbon, including greenhouse gases (e.g. CO2 air-sea flux), and therefore influences also climate. Its impact on atmospheric composition is illustrated for example by dramatic ozone and mercury depletion events which occur within or close to the sea ice zone (SIZ) mostly during polar spring and are catalysed by halogens released from SIZ ice, snow or aerosol. Recent field campaigns in the high Arctic (e.g. BROMEX, OASIS) and Antarctic (Weddell sea cruises) highlight the importance of snow on sea ice as a chemical reservoir and reactor, even during polar night. However, many processes, participating chemical species and their interactions are still poorly understood and/or lack any representation in current models. Furthermore, recent lab studies provide a lot of detail on the chemical environment and processes but need to be integrated much better to improve our understanding of a rapidly changing natural environment. During a 3-day workshop held in Cambridge/UK in October 2013 more than 60 scientists from 15 countries who work on the physics, chemistry or biology of the atmosphere-snow-sea ice system discussed research status and challenges, which need to be addressed in the near future. In this presentation I will give a summary of the main research questions identified during this workshop as well as ways forward to answer them through a community-based interdisciplinary approach.

  18. Research on Nonlinear Characteristics of Image Measurement System for Instantaneous Concentration Field

    Directory of Open Access Journals (Sweden)

    Wu Jing

    2013-06-01

    Full Text Available Quantitative measurement on instantaneous concentration field not only can provide scientific methods for people measuring environment wind tunnel, but also can provide important data for solving convection--diffusion problem in practical project. The established large environment and wind engineering wind tunnel needs to develop the measurement system of instantaneous concentration field in order to study concentration field of environmental pollution diffusion. Based on collecting, analyzing and selecting a large number of literatures, the paper comprehensively studies the image measurement of instantaneous concentration field, and develops the complete software and hardware system. And the developed measurement system is used to measure the results, and the nonlinear characteristics of instable concentration field are studied. Combined with experimental fluid mechanics, information technology, optical scattering and imaging theory, the paper makes quantitative calculation on instability of concentration field from an experimental point of view, which provides an important experimental result for using numerical method to explore the instability of concentration field.

  19. Comparison of determinants of research knowledge utilization by practitioners and administrators in the field of child and family social services

    Directory of Open Access Journals (Sweden)

    Gervais Marie-Joëlle

    2010-06-01

    Full Text Available Abstract Background An important gap exists between research production and its utilization. Few studies have examined the factors affecting knowledge utilization in the field of child and family social services. Methods The objectives of the study are to describe knowledge utilization by child protection administrators and practitioners (N = 477 and to compare factors related to knowledge utilization by these two occupational groups. The study was conducted with an adapted version of the Questionnaire sur l'utilisation des connaissances (Knowledge Utilization Questionnaire. Factor analysis was used to collapse data collected on the questionnaire items. Factor score for each respondent served as independent variables in three separate multivariate regression analyses to explore variables likely to predict research-based knowledge utilization. Results A minority of respondents (18% report using on a frequent basis research-based knowledge in their practice. Relational capital between researchers and users and perceived usefulness of research based knowledge were the two factors most strongly related to utilization. There was a specificity in the factors associated with knowledge utilization according to occupational groups in child protection organizations. Use of active knowledge transfer strategies was associated with knowledge utilization by practitioners, while knowledge dissemination efforts played a more significant role for administrators. Conclusion These results encourage both the use of strategies differentiated according to users and the intensification of interactions between users and researchers to foster research knowledge utilization.

  20. Arts-Based Research: Weaving Magic and Meaning

    Science.gov (United States)

    Greenwood, Janinka

    2012-01-01

    What kinds of things do we research when we use arts-based research? And when we apply arts-based research to educational contexts, what kinds of contributions to the scholarship of learning and teaching can we make? Taking as its basis three case studies in which art processes were used to investigate culture and identity, this essay examines the…

  1. Final Scientific/Technical Report – DE-FG02-06ER64172 – Reaction-Based Reactive Transport Modeling of Iron Reduction and Uranium Immobilization at Area 2 of the NABIR Field Research Center – Subproject to Co-PI Eric E. Roden

    Energy Technology Data Exchange (ETDEWEB)

    Eric E. Roden

    2009-03-17

    This report summarizes research conducted in conjunction with a project entitled “Reaction-Based Reactive Transport Modeling of Iron Reduction and Uranium Immobilization at Area 2 of the NABIR Field Research Center”, which was funded through the Integrative Studies Element of the former NABIR Program (now the Environmental Remediation Sciences Program) within the Office of Biological and Environmental Research. Dr. William Burgos (The Pennsylvania State University) was the overall PI/PD for the project, which included Brian Dempsey (Penn State), Gour-Tsyh (George) Yeh (Central Florida University), and Eric Roden (formerly at The University of Alabama, now at the University of Wisconsin) as separately-funded co-PIs. The project focused on development of a mechanistic understanding and quantitative models of coupled Fe(III)/U(VI) reduction in FRC Area 2 sediments. The work builds on our previous studies of microbial Fe(III) and U(VI) reduction, and was directly aligned with the Scheibe et al. ORNL FRC Field Project at Area 2. Area 2 is a shallow pathway for migration of contaminated groundwater to seeps in the upper reach of Bear Creek at ORNL, mainly through a ca. 1 m thick layer of gravel located 4-5 m below the ground surface. The gravel layer is sandwiched between an overlying layer of disturbed fill material, and 2-3 m of undisturbed shale saprolite derived from the underlying Nolichucky Shale bedrock. The fill was put in place when contaminated soils were excavated and replaced by native saprolite from an uncontaminated area within Bear Creek Valley; the gravel layer was presumably installed prior to addition of the fill in order to provide a stable surface for the operation of heavy machinery. The undisturbed saprolite is highly weathered bedrock that has unconsolidated character but retains much of the bedding and fracture structure of the parent rock (shale with interbedded limestone). Hydrological tracer studies conducted during the Scheibe et al. field

  2. Three—Dimensional Vector Field Visualization Based on Tensor Decomposition

    Institute of Scientific and Technical Information of China (English)

    梁训东; 李斌; 等

    1996-01-01

    This paper presents a visualization method called the deformed cube for visualizing 3D velocity vector field.Based on the decomposition of the tensor which describes the changes of the velocity,it provides a technique for visualizing local flow.A deformed cube,a cube transformed by a tensor in a local coordinate frame,shows the local stretch,shear and rigid body rotation of the local flow corresponding to the decomposed component of the tensor.Users can interactively view the local deformation or any component of the changes.The animation of the deformed cube moving along a streamline achieves a more global impression of the flow field.This method is intended as a complement to global visualization methods.

  3. Image-based thresholds for weeds in maize fields

    DEFF Research Database (Denmark)

    Asif, Ali; Streibig, Jens Carl; Christensen, Svend

    2015-01-01

    Recent development of site-specific weed management strategies suggests patch application of herbicides to avoid their excessive use in crops. The estimation of infestation of weeds and control thresholds are important components for taking spray decisions. If weed pressure is below a certain level...... in some parts of the field and if late germinating weeds do not affect yield, it may not be necessary the spray such places from an economic point of view. Consequently, it makes sense to develop weed control thresholds for patch spraying, based on weed cover early in the growing season. In Danish maize...... field experiments conducted from 2010 to 2012, we estimated competitive ability parameters and control thresholds of naturally established weed populations in the context of decision-making for patch spraying. The most frequent weed was Chenopodium album, accompanied by Capsella bursa-pastoris, Cirsium...

  4. Research on the Temperature Field Characteristics of LiFePO4 Power Battery Based on Ansys Workbench 12.0%基于Ansys Workbench12.0的磷酸铁锂动力电池温度场特性研究

    Institute of Scientific and Technical Information of China (English)

    冯竟阳; 戴作强; 张纪鹏; 张铁柱

    2013-01-01

    To research the temperature field characteristics of LiFePO4 power battery used in electric vehicles, this article firstly introduces the involved theory basis of the emulated calculation, and then puts forward a general emulated calculation process based on the Ansys Workbench 12. 0 software. With respect to different cooling conditions, it conducts the emulated analysis for battery temperature field distribution of both battery cell and battery module, which are in condition of 1. 0 C discharge ratio and have achieved steady status. The simulation results have illustrated that the better cooling condition leads to the better consistency of the internal temperature of the battery,and so the higher stability and battery life. The results provide theoretical basis for the test of battery temperature field and the design, optimization of the battery thermal management system in actual engineering project.%针对电动汽车用磷酸铁锂动力电池温度场分布的均匀性问题,本文以某厂家生产的磷酸铁锂电池IFP36230218为例,依据仿真计算所涉及的理论,基于Ansys Work-bench 12.0软件,提出了一种通用的仿真计算过程,并分别对电池单体及模块在不同冷却条件下的温度场特性进行仿真研究,仿真结果表明,散热情况越好,电池内部温度的一致性就越好,电池寿命和稳定性越高.该研究为实际工程中测定电池温度场分布和设计、优化电池组热管理系统提供了理论依据.

  5. Readiness Based Sparing: A Research Summary

    Science.gov (United States)

    2012-07-01

    Halliday of the RAND Corporation. This RAND study dealt with the initial spares provisioning packages (referred to as “push” packages) that... Halliday , J. (2011). Using field data to improve authorized stockage list push packages. Retrieved from Defense Technical Information Center. (ADA554301

  6. Scientific Disclosure: Social Representations of Brazilian Researchers Acting in the Field of Astronomy

    Science.gov (United States)

    Carneiro, D. L. C. M.

    2014-10-01

    Science dissemination has unquestioned role on intermediate science and society and it is a wide subject of research in education, considering that the construction of knowledge flows in different spaces, and, consequently, produces and disseminates representations. It presents as a motivator for reflection and as a necessary tool to prevent that knowledge do not become synonymous with domination and power. Thereby, the Astronomy assumes a remarkable role as a trigger of scientific dissemination process, due to its interdisciplinary character. From this viewpoint and the theoretical and methodological framework of the Theory of Social Representations (TRS), grounded by Serge Moscovici, this research, qualitative in nature, seek to answer: What are the social representations about scientific dissemination of Brazilian researchers that act in the field of astronomy? The work was based on Longhini, Gomide and Fernandes (2013) research, which delineate the Brazilian scientific community involved in Astronomy, identifying two groups of researchers with different training paths: one with postgraduate in education and related fields, and other with postgraduate in Physics or Astronomy. Thus, this study had the subquestion: Does the researchers of these groups have different conceptions about the practices of science dissemination? A sample was composed of six subjects, three of each formative course, who participated in semi-structured interviews analyzed following the steps outlined by Spink (2012). The results show that the science dissemination is part of the researches schedule's, with a positive image relative to promote scientific knowledge to population and similar on practical approach between the two groups. Point to two social representations of science dissemination: one for society in general, moved by passion, anchored in values and beliefs, in satisfaction of seeing the results that their actions bring to people's lives; and the other to their pairs

  7. Phase field approaches of bone remodeling based on TIP

    Science.gov (United States)

    Ganghoffer, Jean-François; Rahouadj, Rachid; Boisse, Julien; Forest, Samuel

    2016-01-01

    The process of bone remodeling includes a cycle of repair, renewal, and optimization. This adaptation process, in response to variations in external loads and chemical driving factors, involves three main types of bone cells: osteoclasts, which remove the old pre-existing bone; osteoblasts, which form the new bone in a second phase; osteocytes, which are sensing cells embedded into the bone matrix, trigger the aforementioned sequence of events. The remodeling process involves mineralization of the bone in the diffuse interface separating the marrow, which contains all specialized cells, from the newly formed bone. The main objective advocated in this contribution is the setting up of a modeling and simulation framework relying on the phase field method to capture the evolution of the diffuse interface between the new bone and the marrow at the scale of individual trabeculae. The phase field describes the degree of mineralization of this diffuse interface; it varies continuously between the lower value (no mineral) and unity (fully mineralized phase, e.g. new bone), allowing the consideration of a diffuse moving interface. The modeling framework is the theory of continuous media, for which field equations for the mechanical, chemical, and interfacial phenomena are written, based on the thermodynamics of irreversible processes. Additional models for the cellular activity are formulated to describe the coupling of the cell activity responsible for bone production/resorption to the kinetics of the internal variables. Kinetic equations for the internal variables are obtained from a pseudo-potential of dissipation. The combination of the balance equations for the microforce associated to the phase field and the kinetic equations lead to the Ginzburg-Landau equation satisfied by the phase field with a source term accounting for the dissipative microforce. Simulations illustrating the proposed framework are performed in a one-dimensional situation showing the evolution of

  8. Study choice and career development in STEM fields: an overview and integration of the research

    NARCIS (Netherlands)

    Tuijl, van Cathy; Walma van der Molen, Juliette H.

    2015-01-01

    Although science, technology, engineering and mathematics (STEM) study paths and STEM work fields may be relatively difficult and therefore not appropriate for everyone, too many children prematurely exclude STEM-related study and work options, based on negative images of the field or negative abili

  9. Proficiency-Based Education. Research Brief

    Science.gov (United States)

    Johnston, Howard

    2011-01-01

    Proficiency-Based Education is a contemporary instructional model that grew out of the competency-based education movement of the 1980's and 90's. It is based on the premise that TIME is flexible and that students work at their own pace until they have mastered necessary content and skills. As students demonstrate proficiency, then move on to more…

  10. [Research progress of nanosecond pulsed electric field applied to intracellular electromanipulation].

    Science.gov (United States)

    Yao, Chenguo; Mo, Dengbin; Sun, Caixin; Chen, Xin; Xiong, Zheng'ai

    2008-10-01

    In recent years, many experts have done some researches on experiment and mechanism of intracellular electromanipulation (IEM) under nanosecond pulsed electric field (nsPEF). The experiment results have shown that nsPEF could not induce electroporation of cell membrane, but could induce intracellular effects such as apoptosis, calcium release, enhancement of gene expression, and fragmentation of DNA and chromosome. In order to account for the phenomenon, researchers believe that when the pulse width of the pulsed electric field is larger than the charging time of plasma membrane, the pulsed electric field mainly targets on the outer membrane of cell; and that the effect of the pulsed electric field on nucleus and nuclear membrane increases with the decrease of the pulse width. It is also believed that the effect of electroporation changes from the outer membrane to intracellular electromanipulation when the pulse width decreases to a value being smaller than the charging time of plasma membrane.

  11. Making research works visible and stimulating a research milieu in the field of social work - The European Resource Centre for Social Work Research (CERTS

    Directory of Open Access Journals (Sweden)

    2003-11-01

    Full Text Available The project to create a European Resource Centre for Social Work Research (CERTS has been agreed in December 2001 by the General Research Board of the European Commission within the framework programme 'Accompanying Measures for the improving the Human research potential and the Socio Economic Knowledge Base'.

  12. Sleep-related memory consolidation in depression: an emerging field of research.

    Science.gov (United States)

    Hornung, Orla Patricia; Regen, Francesca; Danker-Hopfe, Heidi; Heuser, Isabella; Anghelescu, Ion

    2008-01-01

    Sleep-related memory consolidation has received increasing attention in recent years. Because previous research has focused on healthy young adults, only very few studies have been conducted in patients with psychiatric disorders so far. The investigation of sleep-related memory consolidation in depression offers a wide range of future research opportunities and can therefore be regarded as an emerging field of research. This article gives a short overview of current knowledge of sleep-related memory consolidation in healthy young adults and builds a bridge to psychiatry and depression, where further research is urgently needed.

  13. Rehabilitation Research at the National Institutes of Health: Moving the Field Forward (Executive Summary)

    Science.gov (United States)

    Frontera, Walter R.; Bean, Jonathan F.; Damiano, Diane; Ehrlich-Jones, Linda; Fried-Oken, Melanie; Jette, Alan; Jung, Ranu; Lieber, Rick L.; Malec, James F.; Mueller, Michael J.; Ottenbacher, Kenneth J.; Tansey, Keith E.; Thompson, Aiko

    2017-01-01

    Approximately 53 million Americans live with a disability. For decades, the National Institutes of Health (NIH) has been conducting and supporting research to discover new ways to minimize disability and enhance the quality of life of people with disabilities. After the passage of the Americans With Disabilities Act, NIH established the National Center for Medical Rehabilitation Research, with the goal of developing and implementing a rehabilitation research agenda. Currently, 17 institutes and centers at NIH invest more than $500 million per year in rehabilitation research. Recently, the director of NIH, Francis Collins, appointed a Blue Ribbon Panel to evaluate the status of rehabilitation research across institutes and centers. As a follow-up to the work of that panel, NIH recently organized a conference, “Rehabilitation Research at NIH: Moving the Field Forward.” This report is a summary of the discussions and proposals that will help guide rehabilitation research at NIH in the near future. PMID:28422639

  14. [EVolution of research strategies and development in the field of drugs].

    Science.gov (United States)

    Glomot, R

    2000-07-01

    In the field of drug discovery, strategies have moved on quickly over the last few years. Development of new disciplines as well as technical advancements in many fields, such as pharmacodynamics, pharmacokinetics, drug metabolism, pharmaceutics and toxicology have enabled earlier and improved selection of development candidates. These new avenues of research, using many often the progress in genomics and proteomics, have already led to the elucidation of mechanisms of action unknown to date, ending potentially in new medicines.

  15. Clinical governance and research ethics as barriers to UK low-risk population-based health research?

    Directory of Open Access Journals (Sweden)

    Douglas Flora

    2008-11-01

    Full Text Available Abstract Background Since the Helsinki Declaration was introduced in 1964 as a code of practice for clinical research, it has generally been agreed that research governance is also needed in the field of public health and health promotion research. Recently, a range of factors led to the development of more stringent bureaucratic procedures, governing the conduct of low-risk population-based health research in the United Kingdom. Methods Our paper highlights a case study of the application process to medical research ethics committees in the United Kingdom for a study of the promotion of physical activity by health care providers. The case study presented here is an illustration of the challenges in conducting low-risk population-based health research. Results Our mixed-methods approach involved a questionnaire survey of and semi-structured interviews with health professionals (who were all healthy volunteers. Since our study does not involve the participation of either patients or the general population, one would expect the application to the relevant research ethics committees to be a formality. This proved not to be the case! Conclusion Research ethics committees could be counter-productive, rather than protecting the vulnerable in the research process, they can stifle low-risk population-based health research. Research ethics in health services research is first and foremost the responsibility of the researcher(s, and we need to learn to trust health service researchers again. The burden of current research governance regulation to address the perceived ethical problems is neither appropriate nor adequate. Senior researchers/academics need to educate and train students and junior researchers in the area of research ethics, whilst at the same time reducing pressures on them that lead to unethical research, such as commercial funding, inappropriate government interference and the pressure to publish. We propose that non-invasive low

  16. Geology Structure Identification based on Polarimetric SAR (PolSAR) Data and Field Based Observation at Ciwidey Geothermal Field

    Science.gov (United States)

    Pradipta, R. A.; Saepuloh, A.; Suryantini

    2016-09-01

    Geological structure observation is difficult to be conducted at Quaternary volcanic field due to the classical problem at tropical region such as intensive erosion, dense vegetation covers, and rough terrain. The problem hampers the field observation especially for geological structures mapping. In order to overcome the problems, an active remote sensing technology based on Polarimetric Synthetic Aperture Radar (PolSAR) data was used in this study. The longer wavelength of microwave than optical region caused the SAR layer penetration higher than optics. The Ciwidey Geothermal Field, Indonesia was selected as study area because of the existence of surface manifestations with lack information about the control of geological structures to the geothermal system. Visual interpretation based on composite polarization modes was applied to identify geological structures at study area. The color composite Red-Green-Blue for HV-HH-VV polarizations provided highest texture and structural features among the other composite combination. The Linear Features Density (LFD) map was also used to interpret the fractures zones. The calculated LFD showed high anomaly about 3.6 km/km2 with two strike directions NW-SE and NE-SW. Interestingly, the surface geothermal manifestation agreed with the low anomaly of LFD. The geological structures consisted of ten faults were successfully detected and mapped. The faults type mainly are oblique-slip with strike directions NE-SW and NW-SE.

  17. Design-Based Implementation Research: An Emerging Model for Transforming the Relationship of Research and Practice

    Science.gov (United States)

    Fishman, Barry J.; Penuel, William R.; Allen, Anna-Ruth; Cheng, Britte Haugan; Sabelli, Nora

    2013-01-01

    This chapter presents an introduction to design-based implementation research (DBIR). We describe the need for DBIR as a research approach that challenges educational researchers and practitioners to transcend traditional research/practice barriers to facilitate the design of educational interventions that are effective, sustainable, and scalable.…

  18. Aligning Web-Based Tools to the Research Process Cycle: A Resource for Collaborative Research Projects

    Science.gov (United States)

    Price, Geoffrey P.; Wright, Vivian H.

    2012-01-01

    Using John Creswell's Research Process Cycle as a framework, this article describes various web-based collaborative technologies useful for enhancing the organization and efficiency of educational research. Visualization tools (Cacoo) assist researchers in identifying a research problem. Resource storage tools (Delicious, Mendeley, EasyBib)…

  19. Sharing Control: Developing Research Literacy through Community-Based Action Research

    Science.gov (United States)

    Juergensmeyer, Erik

    2011-01-01

    This article suggests that the methodology of community-based action research provides concrete strategies for fostering effective community problem solving. To argue for a community research pedagogy, the author draws upon past and present scholarship in action research and participatory action research, experiences teaching an undergraduate…

  20. Aligning Web-Based Tools to the Research Process Cycle: A Resource for Collaborative Research Projects

    Science.gov (United States)

    Price, Geoffrey P.; Wright, Vivian H.

    2012-01-01

    Using John Creswell's Research Process Cycle as a framework, this article describes various web-based collaborative technologies useful for enhancing the organization and efficiency of educational research. Visualization tools (Cacoo) assist researchers in identifying a research problem. Resource storage tools (Delicious, Mendeley, EasyBib)…

  1. Interventions for comorbid problem gambling and psychiatric disorders: Advancing a developing field of research.

    Science.gov (United States)

    Dowling, N A; Merkouris, S S; Lorains, F K

    2016-07-01

    Despite significant psychiatric comorbidity in problem gambling, there is little evidence on which to base treatment recommendations for subpopulations of problem gamblers with comorbid psychiatric disorders. This mini-review draws on two separate systematic searches to identify possible interventions for comorbid problem gambling and psychiatric disorders, highlight the gaps in the currently available evidence base, and stimulate further research in this area. In this mini-review, only 21 studies that have conducted post-hoc analyses to explore the influence of psychiatric disorders or problem gambling subtypes on gambling outcomes from different types of treatment were identified. The findings of these studies suggest that most gambling treatments are not contraindicated by psychiatric disorders. Moreover, only 6 randomized studies comparing the efficacy of interventions targeted towards specific comorbidity subgroups with a control/comparison group were identified. The results of these studies provide preliminary evidence for modified dialectical behavior therapy for comorbid substance use, the addition of naltrexone to cognitive-behavioral therapy (CBT) for comorbid alcohol use problems, and the addition of N-acetylcysteine to tobacco support programs and imaginal desensitisation/motivational interviewing for comorbid nicotine dependence. They also suggest that lithium for comorbid bipolar disorder, escitalopram for comorbid anxiety disorders, and the addition of CBT to standard drug treatment for comorbid schizophrenia may be effective. Future research evaluating interventions sequenced according to disorder severity or the functional relationship between the gambling behavior and comorbid symptomatology, identifying psychiatric disorders as moderators of the efficacy of problem gambling interventions, and evaluating interventions matched to client comorbidity could advance this immature field of study.

  2. Work-Identity in Ethnographic Research: Developing Field Roles in a Demanding Workplace Setting

    Directory of Open Access Journals (Sweden)

    Gunilla Jansson PhD

    2013-02-01

    Full Text Available In this article we problematize our field roles as two linguistic ethnographers who aim to study the communication and documentation practices drawn upon by care workers in elderly care facilities in Sweden. Our field roles are discussed in relation to the complex nature of care workers' knowledge and competence, which results from three different aspects of their work-identities: institutional, professional, and individual. As researchers, we found ourselves in constant dialogue with the research participants, and our field roles were continuously shaped and reshaped according to the individuals and the situations in which we became involved. Even aspects of our own identities taken into the field, such as our background and personal qualities, proved to be important in establishing good relations with the care staff. Coming closer to the participants' professional identity proved to be of utmost importance for interpreting their choices and decisions in the workplace. Identity negotiation is presented here as a constructive way of discussing ethnographic field roles in the research field.

  3. Glass-based integrated optical splitters: engineering oriented research

    Science.gov (United States)

    Hao, Yinlei; Zheng, Weiwei; Yang, Jianyi; Jiang, Xiaoqing; Wang, Minghua

    2010-10-01

    Optical splitter is one of most typical device heavily demanded in implementation of Fiber To The Home (FTTH) system. Due to its compatibility with optical fibers, low propagation loss, flexibility, and most distinguishingly, potentially costeffectiveness, glass-based integrated optical splitters made by ion-exchange technology promise to be very attractive in application of optical communication networks. Aiming at integrated optical splitters applied in optical communication network, glass ion-exchange waveguide process is developed, which includes two steps: thermal salts ion-exchange and field-assisted ion-diffusion. By this process, high performance optical splitters are fabricated in specially melted glass substrate. Main performance parameters of these splitters, including maximum insertion loss (IL), polarization dependence loss (PDL), and IL uniformity are all in accordance with corresponding specifications in generic requirements for optic branching components (GR-1209-CORE). In this paper, glass based integrated optical splitters manufacturing is demonstrated, after which, engineering-oriented research work results on glass-based optical splitter are presented.

  4. A Unified 3D Mesh Segmentation Framework Based on Markov Random Field

    Directory of Open Access Journals (Sweden)

    Z.F. Shi

    2012-04-01

    Full Text Available 3D Mesh segmentation has become an important research field in computer graphics during the past decades. Many geometry based and semantic oriented approaches for 3D mesh segmentation has been presented. In this paper, we present a definition of mesh segmentation according to labeling problem. Inspired by the Markov Random Field (MRF based image segmentation, we propose a new framework of 3D mesh segmentation based on MRF and use graph cuts to solve it. Any features of 3D mesh can be integrated into the segmentation framework. Experimental results show that the noise and over-segmentation are avoided. It also demonstrates that the proposed scheme has the capability of combining the geometric and topology information of the 3D mesh.

  5. How pluralistic is the research field on adult education? : Dominating bibliometrical trends, 2005-2012

    Directory of Open Access Journals (Sweden)

    Andreas Fejes

    2015-04-01

    Full Text Available What the field of adult education research is and how it can be described has been a debated issue over the decades. Several scholars argue that the field today is heterogeneous, borrowing theories and methods from a range of disciplines. In this article, we take such statements as a starting point for empirical analysis. In what ways could it be argued that the field is pluralistic rather than monolithic; heterogeneous rather than homogenous? Drawing on bibliographic data of the top cited articles in three main adult education journals between 2005 and 2012, we illustrate how the citation patterns have tendencies of homogeneity when it comes to the geographical country of authorship, since the USA, UK, Australia and Canada dominate, as well as the research methods adopted, since qualitative approaches have near total dominance. Furthermore, there is a tendency to adopt similar theoretical approaches, since sociocultural perspectives, critical pedagogy and post-structuralism represent more than half of the articles in our sample. At the same time, the results of our analysis indicate signs of scholarly pluralism, for instance, in terms of authorship, since both early career researchers and established researchers are represented among the top cited publications. We conclude the article by arguing that empirical analysis of publication and citation patterns is important to further the development of reflexivity within the field, not least for early career researchers, who might benefit from knowledge about what has been recognized among peers as worth citing in recent times.

  6. Socialization into science: An ethnographic study in a field research station

    Science.gov (United States)

    Calovini, Theresa Ann

    While the place of language in building the tasks and activities of the science classroom has received attention in the education literature, how students do the work of affiliation building through language remains poorly understood. This dissertation is based on ethnographic research in an apprenticeship learning situation at a biological field research station. I carried out this research with five undergraduates apprentices. I focus on how the language used in this apprenticeship situation positioned the apprentices with science. Issues of access and diversity in science education have motivated this research but this point can be missed because the five apprentices were all fairly successful in university science. They had all secured their job for the summer as paid research assistants. Yet, even with these successful students, science had a complicated place in their lives. I draw on Gee's (1999) notion of Discourse to understand this complexity. I focus on four Discourses--- Science, Knowing about the Animals, Senior Projects and RAships, and Relationships ---which were important in the apprentices' learning about and socialization with science. I try to understand the inter-workings of these four Discourses through a detailed analysis of three conversations involving one of the participants, Michelle. Michelle's use of narrative emerged as a linguistic resource which she used to explore dilemmas she experienced in the tensions between these four Discourses. Michelle was in many ways an ideal apprentice. She did her job well and she sought and received expert advice on her Senior project. Nonetheless, Michelle faced obstacles in her pursuit of a career in science and these obstacles related to language use and her use of narrative. I show how her use of narrative either facilitated or impeded her learning, depending on the context of the interaction. My analysis of Discourse points to important issues in language use by both students and teachers, with

  7. Research on electromagnetic relay's dynamic characteristics disturbed by uniform static magnetic field

    Institute of Scientific and Technical Information of China (English)

    Guo-fu ZHAI; Qi-ya WANG; Wan-bin REN

    2008-01-01

    Electromagnetic relay is a widely used apparatus which usually works in a magnetic disturbance environment. To evaluate its electromagnetic compatibility (EMC) in a static magnetic field, dynamic characteristics of a clapper relay in a uniform static magnetic field situation based on the finite element method (FEM) is studied. Influences of the magnetic field on dynamic parameters (delay time, pick-up time, end pressure, and final velocity) as well as a situation in which the relay cannot function normally are analyzed. Simulation reveals that the external magnetic field which weakens the relay's air-gap field has a greater influence on the relay's dynamic parameters than the one strengthening the field. The validity of the simulation is verified by measured results of coil current and armature displacement.

  8. Scanning near field microwave microscopy based on an active resonator

    Science.gov (United States)

    Qureshi, Naser; Kolokoltsev, Oleg; Ordonez-Romero, Cesar Leonardo

    2014-03-01

    A large number of recent implementations of near field scanning microwave microscopy (NFSMM) have been based on the perturbation of a resonant cavity connected to a sharp scanning probe. In this work we present results from an alternative approach: the perturbation of a microwave source connected to a scanning tip. Based on a yittrium iron garnet (YIG) cavity ring resonator this scanning probe system has a quality factor greater than 106, which allows us to detect very small frequency shifts, which translates to a very high sensitivity in sample impedance measurements. Using a selection of representative semiconductor, metal and biological samples we show how this approach leads to unusually high sensitivity and spatial resolution. Work supported by a grant from PAPIIT, UNAM 104513.

  9. Recent Trends in Field-Effect Transistors-Based Immunosensors

    Directory of Open Access Journals (Sweden)

    Ana Carolina Mazarin de Moraes

    2016-10-01

    Full Text Available Immunosensors are analytical platforms that detect specific antigen-antibody interactions and play an important role in a wide range of applications in biomedical clinical diagnosis, food safety, and monitoring contaminants in the environment. Field-effect transistors (FET immunosensors have been developed as promising alternatives to conventional immunoassays, which require complicated processes and long-time data acquisition. The electrical signal of FET-based immunosensors is generated as a result of the antigen-antibody conjugation. FET biosensors present real-time and rapid response, require small sample volume, and exhibit higher sensitivity and selectivity. This review brings an overview on the recent literature of FET-based immunosensors, highlighting a diversity of nanomaterials modified with specific receptors as immunosensing platforms for the ultrasensitive detection of various biomolecules.

  10. Predictive Potential Field-Based Collision Avoidance for Multicopters

    Science.gov (United States)

    Nieuwenhuisen, M.; Schadler, M.; Behnke, S.

    2013-08-01

    Reliable obstacle avoidance is a key to navigating with UAVs in the close vicinity of static and dynamic obstacles. Wheel-based mobile robots are often equipped with 2D or 3D laser range finders that cover the 2D workspace sufficiently accurate and at a high rate. Micro UAV platforms operate in a 3D environment, but the restricted payload prohibits the use of fast state-of-the-art 3D sensors. Thus, perception of small obstacles is often only possible in the vicinity of the UAV and a fast collision avoidance system is necessary. We propose a reactive collision avoidance system based on artificial potential fields, that takes the special dynamics of UAVs into account by predicting the influence of obstacles on the estimated trajectory in the near future using a learned motion model. Experimental evaluation shows that the prediction leads to smoother trajectories and allows to navigate collision-free through passageways.

  11. Neuroethics 1995–2012. A Bibliometric Analysis of the Guiding Themes of an Emerging Research Field

    Science.gov (United States)

    Leefmann, Jon; Levallois, Clement; Hildt, Elisabeth

    2016-01-01

    In bioethics, the first decade of the twenty-first century was characterized by the emergence of interest in the ethical, legal, and social aspects of neuroscience research. At the same time an ongoing extension of the topics and phenomena addressed by neuroscientists was observed alongside its rise as one of the leading disciplines in the biomedical science. One of these phenomena addressed by neuroscientists and moral psychologists was the neural processes involved in moral decision-making. Today both strands of research are often addressed under the label of neuroethics. To understand this development we recalled literature from 1995 to 2012 stored in the Mainz Neuroethics Database (i) to investigate the quantitative development of scientific publications in neuroethics; (ii) to explore changes in the topics of neuroethics research within the defined time interval; (iii) to illustrate the interdependence of different research topics within the neuroethics literature; (iv) to show the development of the distribution of neuroethics research on peer-reviewed journals; and (v) to display the academic background and affiliations of neuroethics researchers. Our analysis exposes that there has been a demonstrative increase of neuroethics research while the issues addressed under this label had mostly been present before the establishment of the field. We show that the research on the ethical, legal and social aspects of neuroscience research is hardly related to neuroscience research on moral decision-making and that the academic backgrounds and affiliations of many neuroethics researchers speak for a very close entanglement of neuroscience and neuroethics. As our article suggests that after more than one decade there still is no dominant agenda for the future of neuroethics research, it calls for more reflection about the theoretical underpinnings and prospects to establish neuroethics as a marked-off research field distinct from neuroscience and the diverse branches

  12. Neuroethics 1995-2012. A Bibliometric Analysis of the Guiding Themes of an Emerging Research Field.

    Science.gov (United States)

    Leefmann, Jon; Levallois, Clement; Hildt, Elisabeth

    2016-01-01

    In bioethics, the first decade of the twenty-first century was characterized by the emergence of interest in the ethical, legal, and social aspects of neuroscience research. At the same time an ongoing extension of the topics and phenomena addressed by neuroscientists was observed alongside its rise as one of the leading disciplines in the biomedical science. One of these phenomena addressed by neuroscientists and moral psychologists was the neural processes involved in moral decision-making. Today both strands of research are often addressed under the label of neuroethics. To understand this development we recalled literature from 1995 to 2012 stored in the Mainz Neuroethics Database (i) to investigate the quantitative development of scientific publications in neuroethics; (ii) to explore changes in the topics of neuroethics research within the defined time interval; (iii) to illustrate the interdependence of different research topics within the neuroethics literature; (iv) to show the development of the distribution of neuroethics research on peer-reviewed journals; and (v) to display the academic background and affiliations of neuroethics researchers. Our analysis exposes that there has been a demonstrative increase of neuroethics research while the issues addressed under this label had mostly been present before the establishment of the field. We show that the research on the ethical, legal and social aspects of neuroscience research is hardly related to neuroscience research on moral decision-making and that the academic backgrounds and affiliations of many neuroethics researchers speak for a very close entanglement of neuroscience and neuroethics. As our article suggests that after more than one decade there still is no dominant agenda for the future of neuroethics research, it calls for more reflection about the theoretical underpinnings and prospects to establish neuroethics as a marked-off research field distinct from neuroscience and the diverse branches

  13. Mobile application for field data collection and query: Example from wildlife research (Invited)

    Science.gov (United States)

    Bateman, H.; Lindquist, T.; Whitehouse, R.

    2013-12-01

    Field data collection is often used in many scientific disciplines and effective approaches rely on accurate data collection and recording. We designed a smartphone and tablet application (app) for field-collected data and tested it during a study on wildlife. The objective of our study was to determine the effectiveness of mobile applications in wildlife field research. Student software developers designed applications for mobile devices on the iOS and Android operating systems. Both platforms had similar user interactions via data entry on a touch screen using pre-programmed fields, checkboxes, drop-down menus, and keypad entry. The mobile application included features to insure collection of all measurements in the field through pop-up messages and could proof entries for valid formats. We used undergraduate student subjects to compare the duration of data recording and data entry, and the frequency of errors between the mobile application and traditional (paper) techniques. We field-tested the mobile application using an existing study on wildlife. From the field, technicians could query a database stored on a mobile device to view histories of previously captured animals. Overall, we found that because the mobile application allowed us to enter data in a digital format in the field we could eliminate timely steps to process handwritten data sheets and double-checking data entries. We estimated that, for a 2-month project, using the mobile application instead of traditional data entry and proofing reduced our total project time by 10%. To our knowledge, this is the first application developed for mobile devices for wildlife users interesting in viewing animal capture histories from the field and could be developed for use in other areas of field research.

  14. Internet-Based Delphi Research: Case Based Discussion

    Science.gov (United States)

    Cole, Zachary Douglas; Donohoe, Holly M.; Stellefson, Michael L.

    2013-03-01

    The interactive capacity of the Internet offers benefits that are intimately linked with contemporary research innovation in the natural resource and environmental studies domains. However, e-research methodologies, such as the e-Delphi technique, have yet to undergo critical review. This study advances methodological discourse on the e-Delphi technique by critically assessing an e-Delphi case study. The analysis suggests that the benefits of using e-Delphi are noteworthy but the authors acknowledge that researchers are likely to face challenges that could potentially compromise research validity and reliability. To ensure that these issues are sufficiently considered when planning and designing an e-Delphi, important facets of the technique are discussed and recommendations are offered to help the environmental researcher avoid potential pitfalls associated with coordinating e-Delphi research.

  15. Vision Sensor-Based Road Detection for Field Robot Navigation.

    Science.gov (United States)

    Lu, Keyu; Li, Jian; An, Xiangjing; He, Hangen

    2015-11-24

    Road detection is an essential component of field robot navigation systems. Vision sensors play an important role in road detection for their great potential in environmental perception. In this paper, we propose a hierarchical vision sensor-based method for robust road detection in challenging road scenes. More specifically, for a given road image captured by an on-board vision sensor, we introduce a multiple population genetic algorithm (MPGA)-based approach for efficient road vanishing point detection. Superpixel-level seeds are then selected in an unsupervised way using a clustering strategy. Then, according to the GrowCut framework, the seeds proliferate and iteratively try to occupy their neighbors. After convergence, the initial road segment is obtained. Finally, in order to achieve a globally-consistent road segment, the initial road segment is refined using the conditional random field (CRF) framework, which integrates high-level information into road detection. We perform several experiments to evaluate the common performance, scale sensitivity and noise sensitivity of the proposed method. The experimental results demonstrate that the proposed method exhibits high robustness compared to the state of the art.

  16. Vision Sensor-Based Road Detection for Field Robot Navigation

    Directory of Open Access Journals (Sweden)

    Keyu Lu

    2015-11-01

    Full Text Available Road detection is an essential component of field robot navigation systems. Vision sensors play an important role in road detection for their great potential in environmental perception. In this paper, we propose a hierarchical vision sensor-based method for robust road detection in challenging road scenes. More specifically, for a given road image captured by an on-board vision sensor, we introduce a multiple population genetic algorithm (MPGA-based approach for efficient road vanishing point detection. Superpixel-level seeds are then selected in an unsupervised way using a clustering strategy. Then, according to the GrowCut framework, the seeds proliferate and iteratively try to occupy their neighbors. After convergence, the initial road segment is obtained. Finally, in order to achieve a globally-consistent road segment, the initial road segment is refined using the conditional random field (CRF framework, which integrates high-level information into road detection. We perform several experiments to evaluate the common performance, scale sensitivity and noise sensitivity of the proposed method. The experimental results demonstrate that the proposed method exhibits high robustness compared to the state of the art.

  17. Active contour model based on force field analysis

    Institute of Scientific and Technical Information of China (English)

    HOU Zhi-qiang; HAN Chong-zhao

    2006-01-01

    The traditional snake initial contour should be close to the true boundary of an object of interest in an image;otherwise,an incorrect result will be obtained.Next,active contours have difficulties progressing into boundary concavities.Moreover,the traditional snake as well as almost all of its improved methods can be easily obtained from the local minimum because snake models are nonconvex.An active contour model based on force field analysis (FFA),namely,FFA snake model,is presented in this paper.Based on analyzing force distribution rules of the distance potential force field,a standard is introduced here to distinguish the false one from contour points.The result is not considered as the final solution when the snake energy is minimal.Furthermore,estimation and calculation should be made according to the established standard;only then can the result be considered final.Thus,the snake is prevented from running into the local minimum.The simulation results show that the FFA snake model has a large capture range and can move a snake into the boundary concavities,and that it is able to obtain the object of interest's contour precisely.Compared with the gradient vector flow snake,this new model has a low computational cost.

  18. Dust concentrations and respiratory risks in coalminers: key risk estimates from the British Pneumoconiosis Field Research

    OpenAIRE

    Soutar, C; Hurley, j; Miller, B.; Cowie, H; Buchanan, D.

    2004-01-01

    To help inform the setting of dust control standards in coalmines, this brief review summarises the most recent and reliable exposure-response relations, for damaging respiratory effects, derived from the Pneumoconiosis Field Research (PFR). Collecting data over 38 years in the British coal industry, this was a programme of prospective research on the respiratory health of coal miners, characterised by regular health surveys and detailed measurements of dust and silica concentrations in the w...

  19. Computer-Based Procedures for Field Workers - Identified Benefits

    Energy Technology Data Exchange (ETDEWEB)

    Oxstrand, Johanna [Idaho National Lab. (INL), Idaho Falls, ID (United States); Le Blanc, Katya L. [Idaho National Lab. (INL), Idaho Falls, ID (United States)

    2014-09-01

    The Idaho National Laboratory (INL) computer-based procedure (CBP) research team is exploring how best to design a CBP system that will deliver the intended benefits of increased efficiency and improved human performance. It is important to note that no “off-the-shelf” technology exists for the type of CBP system that is investigated and developed by the INL researchers. As more technology is integrated into the procedure process the importance of an appropriate and methodological approach to the design of the procedure system increases. Technological advancements offer great opportunities for efficiency and safety gains, however if the system is not designed correctly there is a large risk of unintentionally introducing new opportunities for human errors. The INL research team is breaking new ground in the area of CBPs with the prototype they have developed. Current electronic procedure systems are most commonly electronic versions of the paper-based procedures with hyperlinks to other procedures, limited user input functionality, and the ability to mark steps completed. These systems do not fully exploit the advantages digital technology. It is a part of the INL researchers’ role to develop and validate new CBP technologies that greatly increase the benefits of a CBP system to the nuclear industry.

  20. SUPPORTING THE INDUSTRY BY DEVELOPING A DESIGN GUIDANCE FOR COMPUTER-BASED PROCEDURES FOR FIELD WORKERS

    Energy Technology Data Exchange (ETDEWEB)

    Oxstrand, Johanna; LeBlanc, Katya

    2017-06-01

    The paper-based procedures currently used for nearly all activities in the commercial nuclear power industry have a long history of ensuring safe operation of the plants. However, there is potential to greatly increase efficiency and safety by improving how the human interacts with the procedures, which can be achieved through the use of computer-based procedures (CBPs). A CBP system offers a vast variety of improvements, such as context driven job aids, integrated human performance tools and dynamic step presentation. As a step toward the goal of improving procedure use performance, the U.S. Department of Energy Light Water Reactor Sustainability Program researchers, together with the nuclear industry, have been investigating the possibility and feasibility of replacing current paper-based procedures with CBPs. The main purpose of the CBP research conducted at the Idaho National Laboratory was to provide design guidance to the nuclear industry to be used by both utilities and vendors. After studying existing design guidance for CBP systems, the researchers concluded that the majority of the existing guidance is intended for control room CBP systems, and does not necessarily address the challenges of designing CBP systems for instructions carried out in the field. Further, the guidance is often presented on a high level, which leaves the designer to interpret what is meant by the guidance and how to specifically implement it. The authors developed a design guidance to provide guidance specifically tailored to instructions that are carried out in the field based.