Proceedings of the Canadian Wind Energy Association's 2009 wind matters conference : wind and power systems

International Nuclear Information System (INIS)

2009-01-01

This conference provided a forum for wind energy and electric power industry experts to discuss issues related to wind and power systems. An overview of wind integration studies and activities in Canada and the United States was provided. New tools and technologies for facilitating the integration of wind and improve market conditions for wind energy developers were presented. Methods of increasing wind penetration were evaluated, and technical issues related to wind interconnections throughout North America were reviewed. The conference was divided into the following 5 sessions: (1) experiences with wind integration, and lessons learned, (2) update on ongoing wind integration initiatives in Canada and the United States, (3) initiatives and tools to facilitate wind integration and market access, (4) developments in wind interconnection and grid codes, (5) wind energy and cold weather considerations, and (6) challenges to achieving the 20 per cent WindVision goal in Canada. The conference featured 21 presentations, of which 13 have been catalogued separately for inclusion in this database. refs., tabs., figs

Long-term solar wind electron variations between 1971 and 1978

International Nuclear Information System (INIS)

Feldman, W.C.; Asbridge, J.R.; Bame, S.J.; Gosling, J.T.

1979-01-01

Imp solar wind electron data measured between 1971 and 1978 were studied with the aim of determining long-term variations near the earth. Two separate sets of parameter variations were observed: (1) in 1976--1977 the solar wind density, the electron temperature, and the interplanetary electrostatic potential were all enhanced, and (2) the halo density and associated electron parameters were all depressed during a 1 1/2-year period centered on the last 6 months of 1976. Although interpretation of these results in terms of corresponding coronal and interplanetary variations is not unique, it may be significant that measured solar wind parameters near the minimum of solar cycle 20 agree better with the Hartle-Sturrock model of the coronal expansion than they do during other epochs

Practical guidelines for qualitative research using online forums.

Science.gov (United States)

Im, Eun-Ok; Chee, Wonshik

2012-11-01

With an increasing number of Internet research in general, the number of qualitative Internet studies has recently increased. Online forums are one of the most frequently used qualitative Internet research methods. Despite an increasing number of online forum studies, very few articles have been written to provide practical guidelines to conduct an online forum as a qualitative research method. In this article, practical guidelines in using an online forum as a qualitative research method are proposed based on three previous online forum studies. First, the three studies are concisely described. Practical guidelines are proposed based on nine idea categories related to issues in the three studies: (a) a fit with research purpose and questions, (b) logistics, (c) electronic versus conventional informed consent process, (d) structure and functionality of online forums, (e) interdisciplinary team, (f) screening methods, (g) languages, (h) data analysis methods, and (i) getting participants' feedback.

Husum wind `97. Amiable and powerful. Proceedings; Husum Wind `97. Liebenswert und leistungsstark. Kongressband

Energy Technology Data Exchange (ETDEWEB)

NONE

1997-12-31

The Husum Fair and Congress on Wind Energy 97 wants to inform on and demonstrate the state of the art of wind energy and its potentials of development. This conference volume contains 21 papers in seven sections: Wind energy - society and environment; forum of the wind power plant manufacturers represented at the Husum Wind 97; foreign markets for wind power plants; development prospects for wind power; wind power in retrospective and relevant operating experience; panel discussion ``The amendment to the act on remuneration for power fed into the mains - wind power in the lull``; excursion to the test field WINDTEST, Kaiser-Wilhelm-Koog. (AKF)

Power Electronics for the Next Generation Wind Turbine System

DEFF Research Database (Denmark)

Ma, Ke

This book presents recent studies on the power electronics used for the next generation wind turbine system. Some criteria and tools for evaluating and improving the critical performances of the wind power converters have been proposed and established. The book addresses some emerging problems...

Power Electronics Control of Wind Energy in Distributed Power System

DEFF Research Database (Denmark)

Iov, Florin; Ciobotaru, Mihai; Blaabjerg, Frede

2008-01-01

is to change the electrical power production sources from the conventional, fossil (and short term) based energy sources to renewable energy resources. The other is to use high efficient power electronics in power generation, power transmission/distribution and end-user application. This paper discuss the most...... emerging renewable energy sources, wind energy, which by means of power electronics are changing from being a minor energy source to be acting as an important power source in the energy system. Power electronics is the enabling technology and the presentation will cover the development in wind turbine...... technology from kW to MW, discuss which power electronic solutions are most feasible and used today....

Visual Analysis of MOOC Forums with iForum.

Science.gov (United States)

Fu, Siwei; Zhao, Jian; Cui, Weiwei; Qu, Huamin

2017-01-01

Discussion forums of Massive Open Online Courses (MOOC) provide great opportunities for students to interact with instructional staff as well as other students. Exploration of MOOC forum data can offer valuable insights for these staff to enhance the course and prepare the next release. However, it is challenging due to the large, complicated, and heterogeneous nature of relevant datasets, which contain multiple dynamically interacting objects such as users, posts, and threads, each one including multiple attributes. In this paper, we present a design study for developing an interactive visual analytics system, called iForum, that allows for effectively discovering and understanding temporal patterns in MOOC forums. The design study was conducted with three domain experts in an iterative manner over one year, including a MOOC instructor and two official teaching assistants. iForum offers a set of novel visualization designs for presenting the three interleaving aspects of MOOC forums (i.e., posts, users, and threads) at three different scales. To demonstrate the effectiveness and usefulness of iForum, we describe a case study involving field experts, in which they use iForum to investigate real MOOC forum data for a course on JAVA programming.

Maximum wind energy extraction strategies using power electronic converters

Science.gov (United States)

Wang, Quincy Qing

2003-10-01

This thesis focuses on maximum wind energy extraction strategies for achieving the highest energy output of variable speed wind turbine power generation systems. Power electronic converters and controls provide the basic platform to accomplish the research of this thesis in both hardware and software aspects. In order to send wind energy to a utility grid, a variable speed wind turbine requires a power electronic converter to convert a variable voltage variable frequency source into a fixed voltage fixed frequency supply. Generic single-phase and three-phase converter topologies, converter control methods for wind power generation, as well as the developed direct drive generator, are introduced in the thesis for establishing variable-speed wind energy conversion systems. Variable speed wind power generation system modeling and simulation are essential methods both for understanding the system behavior and for developing advanced system control strategies. Wind generation system components, including wind turbine, 1-phase IGBT inverter, 3-phase IGBT inverter, synchronous generator, and rectifier, are modeled in this thesis using MATLAB/SIMULINK. The simulation results have been verified by a commercial simulation software package, PSIM, and confirmed by field test results. Since the dynamic time constants for these individual models are much different, a creative approach has also been developed in this thesis to combine these models for entire wind power generation system simulation. An advanced maximum wind energy extraction strategy relies not only on proper system hardware design, but also on sophisticated software control algorithms. Based on literature review and computer simulation on wind turbine control algorithms, an intelligent maximum wind energy extraction control algorithm is proposed in this thesis. This algorithm has a unique on-line adaptation and optimization capability, which is able to achieve maximum wind energy conversion efficiency through

Electron heat flux instabilities in the solar wind

International Nuclear Information System (INIS)

Gary, S.P.; Feldman, W.C.; Forslund, D.W.; Montgomery, M.D.

1975-01-01

There are at least three plasma instabilities associated with the electron heat flux in the solar wind. This letter reports the study of the unstable fast magnetosonic, Alfven and whistler modes via a computer code which solves the full electromagnetic, linear, Vlasov dispersion relation. Linear theory demonstrates that both the magnetosonic and Alfven instabilities are candidates for turbulent limitation of the heat flux in the solar wind at 1 A.U

Kinetic Theory and Fast Wind Observations of the Electron Strahl

Science.gov (United States)

Horaites, Konstantinos; Boldyrev, Stanislav; Wilson, Lynn B., III; Viñas, Adolfo F.; Merka, Jan

2018-02-01

We develop a model for the strahl population in the solar wind - a narrow, low-density and high-energy electron beam centred on the magnetic field direction. Our model is based on the solution of the electron drift-kinetic equation at heliospheric distances where the plasma density, temperature and the magnetic field strength decline as power laws of the distance along a magnetic flux tube. Our solution for the strahl depends on a number of parameters that, in the absence of the analytic solution for the full electron velocity distribution function (eVDF), cannot be derived from the theory. We however demonstrate that these parameters can be efficiently found from matching our solution with observations of the eVDF made by the Wind satellite's SWE strahl detector. The model is successful at predicting the angular width (FWHM) of the strahl for the Wind data at 1 au, in particular by predicting how this width scales with particle energy and background density. We find that the strahl distribution is largely determined by the local temperature Knudsen number γ ∼ |T dT/dx|/n, which parametrizes solar wind collisionality. We compute averaged strahl distributions for typical Knudsen numbers observed in the solar wind, and fit our model to these data. The model can be matched quite closely to the eVDFs at 1 au; however, it then overestimates the strahl amplitude at larger heliocentric distances. This indicates that our model may be improved through the inclusion of additional physics, possibly through the introduction of 'anomalous diffusion' of the strahl electrons.

Internet discussion forums as part of a student-centred teaching concept of pharmacology.

Science.gov (United States)

Sucha, Michael; Engelhardt, Stefan; Sarikas, Antonio

2013-01-01

The world wide web opens up new opportunities to interconnect electronic and classroom teaching and to promote active student participation. In this project article we describe the use of internet discussion forums as part of a student-centred teaching concept of pharmacology and discuss its advantages and disadvantages based on evaluation data and current literature. Final year medical students at the Technische Universität München (Munich, Germany) with the elective pharmacology moderated an internet forum that allowed all students to discuss pharmacology-related questions. Evaluation results of forum participants and elective students demonstrated a learning benefit of internet forums in pharmacology teaching. Internet discussion forums offer an easy-to-implement and effective way to actively engage students and increase the learning benefit of electronic and classroom teaching in pharmacology.

Kappa-Electrons Downstream of the Solar Wind Termination Shock

Science.gov (United States)

Fahr, H. J.

2017-12-01

A theoretical description of the solar wind electron distribution function downstream of the termination shock under the influence of the shock-induced injection of overshooting KeV-energetic electrons will be presented. A kinetic phasespace transport equation in the bulk frame of the heliosheath plasma flow is developed for the solar wind electrons, taking into account shock-induced electron injection, convective changes, magnetic cooling processes and whistler wave-induced energy diffusion. Assuming that the local electron distribution under the prevailing Non-LTE conditions can be represented by a local kappa function with a local kappa parameter that varies with the streamline coordinates, we determine the parameters of the resulting, initial kappa distribution for the downstream electrons. From this initial function spectral electron fluxes can be derived and can be compared with those measured by the VOYAGER-1 spacecraft in the range between 40 to 70 KeV. It can then be shown that with kappa values around kappa = 6 one can in fact fit these data very satisfactorily. In addition it is shown that for isentropic electron flows kappa-distributed electrons have to undergo simultaneous changes of both parameters, i.e. kappa and theta, of the electron kappa function. It is also shown then that under the influence of energy sinks and sources the electron flux becomes non-isentropic with electron entropies changing along the streamline.

Investigating electronic word-of-mouth effects on online discussion forums: the role of perceived positive electronic word-of-mouth review credibility.

Science.gov (United States)

Chih, Wen-Hai; Wang, Kai-Yu; Hsu, Li-Chun; Huang, Su-Chen

2013-09-01

Electronic word of mouth (eWOM) has been an important factor influencing consumer purchase decisions. Using the ABC model of attitude, this study proposes a model to explain how eWOM affects online discussion forums. Specifically, we propose that platform (Web site reputation and source credibility) and customer (obtaining buying-related information and social orientation through information) factors influence purchase intentions via perceived positive eWOM review credibility, as well as product and Web site attitudes in an online community context. A total of 353 online discussion forum users in an online community (Fashion Guide) in Taiwan were recruited, and structural equation modeling (SEM) was used to test the research hypotheses. The results indicate that Web site reputation, source credibility, obtaining buying-related information, and social orientation through information positively influence perceived positive eWOM review credibility. In turn, perceived positive eWOM review credibility directly influences purchase intentions and also indirectly influences purchase intentions via product and Web site attitudes. Finally, we discuss the theoretical and managerial implications of the findings.

Solar Wind 0.1-1 keV Electrons in the Corotating Interaction Regions

Science.gov (United States)

Wang, L.; Tao, J.; Li, G.; Wimmer-Schweingruber, R. F.; Jian, L. K.; He, J.; Tu, C.; Tian, H.; Bale, S. D.

2017-12-01

Here we present a statistical study of the 0.1-1 keV suprathermal electrons in the undisturbed and compressed slow/fast solar wind, for the 71 corotating interaction regions (CIRs) with good measurements from the WIND 3DP and MFI instruments from 1995 to 1997. For each of these CIRs, we separate the strahl and halo electrons based on their different behaviors in pitch angle distributions in the undisturbed and compressed solar wind. We fit both the strahl and halo energy spectra to a kappa function with an index κ index and effective temperature Teff, and calculate the pitch-angle width at half-maximum (PAHM) of the strahl population. We also integrate the electron measurements between 0.1 and 1.0 keV to obtain the number density n and average energy Eavg for the strahl and halo populations. We find that for both the strahl and halo populations within and around these CIRs, the fitted κ index strongly correlates with Teff, similar to the quiet-time solar wind (Tao et al., ApJ, 2016). The number density of both the strahl and halo shows a strong positive correlation with the electron core temperature. The strahl number density ns is correlated with the magnitude of interplanetary magnetic field, and the strahl PAHM width is anti-correlated with the solar wind speed. These results suggest that the origin of strahl electrons from the solar corona is likely related to the electron core temperature and magnetic field strength, while the production of halo electrons in the interplanetary medium could depend on the solar wind velocity.

Effects of electrons on the solar wind proton temperature anisotropy

International Nuclear Information System (INIS)

Michno, M. J.; Lazar, M.; Schlickeiser, R.; Yoon, P. H.

2014-01-01

Among the kinetic microinstabilities, the firehose instability is one of the most efficient mechanisms to restrict the unlimited increase of temperature anisotropy in the direction of an ambient magnetic field as predicted by adiabatic expansion of collision-poor solar wind. Indeed, the solar wind proton temperature anisotropy detected near 1 AU shows that it is constrained by the marginal firehose condition. Of the two types of firehose instabilities, namely, parallel and oblique, the literature suggests that the solar wind data conform more closely to the marginal oblique firehose condition. In the present work, however, it is shown that the parallel firehose instability threshold is markedly influenced by the presence of anisotropic electrons, such that under some circumstances, the cumulative effects of both electron and proton anisotropies could describe the observation without considering the oblique firehose mode.

Interaction of suprathermal solar wind electron fluxes with sheared whistler waves: fan instability

Directory of Open Access Journals (Sweden)

C. Krafft

Full Text Available Several in situ measurements performed in the solar wind evidenced that solar type III radio bursts were some-times associated with locally excited Langmuir waves, high-energy electron fluxes and low-frequency electrostatic and electromagnetic waves; moreover, in some cases, the simultaneous identification of energetic electron fluxes, Langmuir and whistler waves was performed. This paper shows how whistlers can be excited in the disturbed solar wind through the so-called "fan instability" by interacting with energetic electrons at the anomalous Doppler resonance. This instability process, which is driven by the anisotropy in the energetic electron velocity distribution along the ambient magnetic field, does not require any positive slope in the suprathermal electron tail and thus can account for physical situations where plateaued reduced electron velocity distributions were observed in solar wind plasmas in association with Langmuir and whistler waves. Owing to linear calculations of growth rates, we show that for disturbed solar wind conditions (that is, when suprathermal particle fluxes propagate along the ambient magnetic field, the fan instability can excite VLF waves (whistlers and lower hybrid waves with characteristics close to those observed in space experiments.

Key words. Space plasma physics (waves and instabilities – Radio Science (waves in plasma – Solar physics, astrophysics and astronomy (radio emissions

Interaction of suprathermal solar wind electron fluxes with sheared whistler waves: fan instability

Directory of Open Access Journals (Sweden)

C. Krafft

2003-07-01

Full Text Available Several in situ measurements performed in the solar wind evidenced that solar type III radio bursts were some-times associated with locally excited Langmuir waves, high-energy electron fluxes and low-frequency electrostatic and electromagnetic waves; moreover, in some cases, the simultaneous identification of energetic electron fluxes, Langmuir and whistler waves was performed. This paper shows how whistlers can be excited in the disturbed solar wind through the so-called "fan instability" by interacting with energetic electrons at the anomalous Doppler resonance. This instability process, which is driven by the anisotropy in the energetic electron velocity distribution along the ambient magnetic field, does not require any positive slope in the suprathermal electron tail and thus can account for physical situations where plateaued reduced electron velocity distributions were observed in solar wind plasmas in association with Langmuir and whistler waves. Owing to linear calculations of growth rates, we show that for disturbed solar wind conditions (that is, when suprathermal particle fluxes propagate along the ambient magnetic field, the fan instability can excite VLF waves (whistlers and lower hybrid waves with characteristics close to those observed in space experiments.Key words. Space plasma physics (waves and instabilities – Radio Science (waves in plasma – Solar physics, astrophysics and astronomy (radio emissions

On Electron-Scale Whistler Turbulence in the Solar Wind

Science.gov (United States)

Narita, Y.; Nakamura, R.; Baumjohann, W.; Glassmeier, K.-H.; Motschmann, U.; Giles, B.; Magnes, W.; Fischer, D.; Torbert, R. B.; Russell, C. T.

2016-01-01

For the first time, the dispersion relation for turbulence magnetic field fluctuations in the solar wind is determined directly on small scales of the order of the electron inertial length, using four-point magnetometer observations from the Magnetospheric Multiscale mission. The data are analyzed using the high-resolution adaptive wave telescope technique. Small-scale solar wind turbulence is primarily composed of highly obliquely propagating waves, with dispersion consistent with that of the whistler mode.

Counterstreaming solar wind halo electron events on open field lines?

Science.gov (United States)

Gosling, J. T.; Mccomas, D. J.; Phillips, J. L.

1992-01-01

Counterstreaming solar wind halo electron events have been identified as a common 1 AU signature of coronal mass ejection events, and have generally been interpreted as indicative of closed magnetic field topologies, i.e., magnetic loops or flux ropes rooted at both ends in the Sun, or detached plasmoids. In this paper we examine the possibility that these events may instead occur preferentially on open field lines, and that counterstreaming results from reflection or injection behind interplanetary shocks or from mirroring from regions of compressed magnetic field farther out in the heliosphere. We conclude that neither of these suggested sources of counterstreaming electron beams is viable and that the best interpretation of observed counterstreaming electron events in the solar wind remains that of passage of closed field structures.

A quasilinear kinetic model for solar wind electrons and protons instabilities

Science.gov (United States)

Sarfraz, M.; Yoon, P. H.

2017-12-01

In situ measurements confirm the anisotropic behavior in temperatures of solar wind species. These anisotropies associated with charge particles are observed to be relaxed. In collionless limit, kinetic instabilities play a significant role to reshape particles distribution. The linear analysis results are encapsulated in inverse relationship between anisotropy and plasma beta based observations fittings techniques, simulations methods, or solution of linearized Vlasov equation. Here amacroscopic quasilinear technique is adopted to confirm inverse relationship through solutions of set of self-consistent kinetic equations. Firstly, for a homogeneous and non-collisional medium, quasilinear kinetic model is employed to display asymptotic variations of core and halo electrons temperatures and saturations of wave energy densities for electromagnetic electron cyclotron (EMEC) instability sourced by, T⊥}>T{∥ . It is shown that, in (β ∥ , T⊥}/T{∥ ) phase space, the saturations stages of anisotropies associated with core and halo electrons lined up on their respective marginal stability curves. Secondly, for case of electrons firehose instability ignited by excessive parallel temperature i.e T⊥}>T{∥ , both electrons and protons are allowed to dynamically evolve in time. It is also observed that, the trajectories of protons and electrons at saturation stages in phase space of anisotropy and plasma beta correspond to proton cyclotron and firehose marginal stability curves, respectively. Next, the outstanding issue that most of observed proton data resides in nearly isotropic state in phase space is interpreted. Here, in quasilinear frame-work of inhomogeneous solar wind system, a set of self-consistent quasilinear equations is formulated to show a dynamical variations of temperatures with spatial distributions. On choice of different initial parameters, it is shown that, interplay of electron and proton instabilities provides an counter-balancing force to slow

The solar wind control of electron fluxes in geostationary orbit during magnetic storms

International Nuclear Information System (INIS)

Popov, G.V.; Degtyarev, V.I.; Sheshukov, S.S.; Chudnenko, S.E.

1999-01-01

The dynamics of electron fluxes (with energies from 30 to 1360 keV) in geostationary orbit during magnetic storms was investigated on the basis of LANL spacecraft 1976-059 and 1977-007 data. Thirty-seven magnetic storms with distinct onsets from the time interval July 1976-December 1978 were used in the analysis. A treatment of experimental data involved the moving averaging and the overlapping epoch method. The smoothed component of electron fluxes represents mainly trapped electrons and shows their strong dependence on the solar wind velocity. The time lag between a smoothed electron flux and the solar wind velocity increases with electron energy reflecting dynamics of the inner magnetosphere filling with trapped energetic electrons originating from substorm injection regions located not far outside geostationary orbit

Opportunities and challenges for comparative effectiveness research (CER) with Electronic Clinical Data: a perspective from the EDM forum.

Science.gov (United States)

Holve, Erin; Segal, Courtney; Hamilton Lopez, Marianne

2012-07-01

The Electronic Data Methods (EDM) Forum brings together perspectives from the Prospective Outcome Systems using Patient-specific Electronic data to Compare Tests and therapies (PROSPECT) studies, the Scalable Distributed Research Networks, and the Enhanced Registries projects. This paper discusses challenges faced by the research teams as part of their efforts to develop electronic clinical data (ECD) infrastructure to support comparative effectiveness research (CER). The findings reflect a set of opportunities for transdisciplinary learning, and will ideally enhance the transparency and generalizability of CER using ECD. Findings are based on 6 exploratory site visits conducted under naturalistic inquiry in the spring of 2011. Themes, challenges, and innovations were identified in the visit summaries through coding, keyword searches, and review for complex concepts. : The identified overarching challenges and emerging opportunities include: the substantial level of effort to establish and sustain data sharing partnerships; the importance of understanding the strengths and limitations of clinical informatics tools, platforms, and models that have emerged to enable research with ECD; the need for rigorous methods to assess data validity, quality, and context for multisite studies; and, emerging opportunities to achieve meaningful patient and consumer engagement and work collaboratively with multidisciplinary teams. The new infrastructure must evolve to serve a diverse set of potential users and must scale to address a range of CER or patient-centered outcomes research (PCOR) questions. To achieve this aim-to improve the quality, transparency, and reproducibility of CER and PCOR-a high level of collaboration and support is necessary to foster partnership and best practices as part of the EDM Forum.

Quiet-time Suprathermal (~0.1-1.5 keV) Electrons in the Solar Wind

Science.gov (United States)

Tao, Jiawei; Wang, Linghua; Zong, Qiugang; Li, Gang; Salem, Chadi S.; Wimmer-Schweingruber, Robert F.; He, Jiansen; Tu, Chuanyi; Bale, Stuart D.

2016-03-01

We present a statistical survey of the energy spectrum of solar wind suprathermal (˜0.1-1.5 keV) electrons measured by the WIND 3DP instrument at 1 AU during quiet times at the minimum and maximum of solar cycles 23 and 24. After separating (beaming) strahl electrons from (isotropic) halo electrons according to their different behaviors in the angular distribution, we fit the observed energy spectrum of both strahl and halo electrons at ˜0.1-1.5 keV to a Kappa distribution function with an index κ and effective temperature Teff. We also calculate the number density n and average energy Eavg of strahl and halo electrons by integrating the electron measurements between ˜0.1 and 1.5 keV. We find a strong positive correlation between κ and Teff for both strahl and halo electrons, and a strong positive correlation between the strahl n and halo n, likely reflecting the nature of the generation of these suprathermal electrons. In both solar cycles, κ is larger at solar minimum than at solar maximum for both strahl and halo electrons. The halo κ is generally smaller than the strahl κ (except during the solar minimum of cycle 23). The strahl n is larger at solar maximum, but the halo n shows no difference between solar minimum and maximum. Both the strahl n and halo n have no clear association with the solar wind core population, but the density ratio between the strahl and halo roughly anti-correlates (correlates) with the solar wind density (velocity).

On the upstream boundary of electron foreshocks in the solar wind

Science.gov (United States)

Zimbardo, G.; Veltri, P.

1995-01-01

The upstream boundary of electron foreshocks is defined as the path of the fastest electrons reflected by collisionless shocks and moving along the magnetic field in the solar wind. Considerable levels of magnetic fluctuations are found in these regions of the solar wind, and their effect is to create both a broadening and a fine structure of the electron foreshock boundary. The magnetic structure is studied by means of a 3-D numerical simulation of a turbulent magnetic field. Enhanced, anomalous diffusion is found, (Delta x(exp 2)) varies as s(sup alpha), where alpha is greater than 1 for typical values of the parameters (here, Delta x(exp 2) is the mean square width of the tangent magnetic surface and s is the field line length). This corresponds to a Levy flight regime for the magnetic field line random walk, and allows very efficient electron propagation perpendicular to the magnetic field. Implications on the observations of planetary foreshocks and of the termination shock foreshock are considered.

Forum-ing: Signature practice for public theological discourse ...

African Journals Online (AJOL)

The forum meets every Monday morning, except when there is a national holiday. It has operated 30 consecutive years. The forum has a series of presentations, including the opening prayer, self-introductions of each person, a report of the executive director, special presentations from selected community groups, reports, ...

Electron heat flux dropouts in the solar wind: Evidence for interplanetary magnetic field reconnection?

International Nuclear Information System (INIS)

McComas, D.J.; Gosling, J.T.; Phillips, J.L.; Bame, S.J.; Luhmann, J.G.; Smith, E.J.

1989-01-01

Electron heat flux dropout events have been observed in the solar wind using the ISEE 3 plasma electron data set. These events manifest themselves as dropouts of the solar wind halo electrons which are normally found streaming outward along the local magnetic field. These dropouts leave nearly isotropic distributions of solar wind halo electrons, and consequently, the heat flux in these events is reduced to near the observational noise level. We have examined ISEE 3 data from shortly after launch (August 16, 1978) through the end of 1978 and identified 25 such events ranging in duration from 20 min to over 11 hours. Comparison with the ISEE 3 magnetometer data indicates that these intervals nearly always occur in conjunction with large rotations of the interplanetary magnetic field. Statistical analyses of the plasma and magnetic field data for the 25 dropout intervals indicate that heat flux dropouts generally occur in association with high plasma densities low plasma velocities, low ion and electron temperatures, and low magnetic field magnitudes. A second set of 25 intervals chosen specifically to lie at large field rotations, but at times at which not heat flux dropouts were observed, do not show these characteristic plalsma variations. This suggests that the dropout intervals comprise a unique set of events. Since the hot halo electrons normally found streaming outward from the Sun along the interplanetary magnetic field (the solar wind electron heat flux) are a result of direct magnetic connection to the hot solar corona, heat flux dropout intervals may indicate that the spacecraft is sampling plasma regimes which are magnetically disconnected from the Sun and instead are connected to the outer heliosphere at both ends

Forum-ing: Signature practice for public theological discourse

Directory of Open Access Journals (Sweden)

Edward P. Wimberly

2014-05-01

Full Text Available This article introduces a unique model for public theological conversation and discourse, which was developed by the Concerned Black Clergy of Atlanta (CBC. It was a model developed in response to the problems of poverty, homelessness, and the ‘missing and murdered children’ victimised in Atlanta, Georgia in the United States of America in the early 1980s. It was originally organised to respond to the economic, financial, spiritual, emotional, employment, housing and resource needs of the underserved poor. This unique practice is called forum-ing. The forum meets every Monday morning, except when there is a national holiday. It has operated 30 consecutive years. The forum has a series of presentations, including the opening prayer, self-introductions of each person, a report of the executive director, special presentations from selected community groups, reports, and then questions and answers. The end result is that those attending engage in a process of discourse that enables them to internalise new ideas, approaches, and activities for addressing poverty and injustice in the community. Key to forum-ing for the 21st century is that it is a form of public practical theology rooted and grounded in non-violence growing out of the civil rights movement of the 1950s and 1960s in the United States. The overall purpose of this article is to contribute to the effort of the Faculty of Theology at the University of Pretoria (South Africa to identify those variables that will assist religious leaders in South Africa to develop public conversational spaces to enhance democratic participation. This article presents one model from the African American community in Atlanta, Georgia. The hope is to lift up key variables that might assist in the practical and pastoral theological conversation taking place in South Africa at present.

Illinois Wind Workers Group

Energy Technology Data Exchange (ETDEWEB)

David G. Loomis

2012-05-28

The Illinois Wind Working Group (IWWG) was founded in 2006 with about 15 members. It has grown to over 200 members today representing all aspects of the wind industry across the State of Illinois. In 2008, the IWWG developed a strategic plan to give direction to the group and its activities. The strategic plan identifies ways to address critical market barriers to the further penetration of wind. The key to addressing these market barriers is public education and outreach. Since Illinois has a restructured electricity market, utilities no longer have a strong control over the addition of new capacity within the state. Instead, market acceptance depends on willing landowners to lease land and willing county officials to site wind farms. Many times these groups are uninformed about the benefits of wind energy and unfamiliar with the process. Therefore, many of the project objectives focus on conferences, forum, databases and research that will allow these stakeholders to make well-educated decisions.

Electron temperature anisotropy constraints in the solar wind

Czech Academy of Sciences Publication Activity Database

Štverák, Štěpán; Trávníček, Pavel M.; Maksimovic, M.; Marsch, E.; Fazakerley, A.; Scime, E. E.

2008-01-01

Roč. 113, A3 /2008/ (2008), A03103/1-A03103/10 ISSN 0148-0227 R&D Projects: GA AV ČR IAA300420602 Grant - others:EU(XE) ESA-PECS project No. 98024 Institutional research plan: CEZ:AV0Z10030501; CEZ:AV0Z30420517 Keywords : solar wind electrons * temperature anisotropy * radial Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics Impact factor: 3.147, year: 2008

The forum as a friend: parental mental illness and communication on open Internet forums.

Science.gov (United States)

Widemalm, My; Hjärthag, Fredrik

2015-10-01

The aim of this study was to identify how daughters or sons to parents suffering from mental illness perceive their situation. The objective was to provide new knowledge based on what they communicate on open Internet forums. The sample consisted of forum posts written by individuals who reported that they had mentally ill parents. Data collection comprised 301 comments from 35 forum threads on 5 different Swedish Internet forums, and predetermined inclusion criteria were used. Data were analyzed qualitatively using thematic analysis. The analysis generated four themes: "Caregiver burden," "Knowledge seeking," "Support from the forum," and "Frustration and powerlessness over health care." The results showed that parents' mental illness affected the forum writers on several levels, and they often felt stigmatized. The writers often lacked knowledge of their parents' mental illness and sought out Internet forums for information and support from peers in similar situations. The psychiatric care given to the parents was a source of dissatisfaction among the forum writers, who often felt that their parents did not receive adequate care. This study shows that fear of stigmatization and perceived lack of care and support caused forum writers to anonymously seek out Internet forums for information and support from others with similar experiences. The role of social support and the attractiveness of anonymity and availability typical for open Internet forums ought to be considered by health care professionals and researchers when developing new ways for providing support for children or adolescents with a mentally ill parent.

Reliability analysis of grid connected small wind turbine power electronics

International Nuclear Information System (INIS)

Arifujjaman, Md.; Iqbal, M.T.; Quaicoe, J.E.

2009-01-01

Grid connection of small permanent magnet generator (PMG) based wind turbines requires a power conditioning system comprising a bridge rectifier, a dc-dc converter and a grid-tie inverter. This work presents a reliability analysis and an identification of the least reliable component of the power conditioning system of such grid connection arrangements. Reliability of the configuration is analyzed for the worst case scenario of maximum conversion losses at a particular wind speed. The analysis reveals that the reliability of the power conditioning system of such PMG based wind turbines is fairly low and it reduces to 84% of initial value within one year. The investigation is further enhanced by identifying the least reliable component within the power conditioning system and found that the inverter has the dominant effect on the system reliability, while the dc-dc converter has the least significant effect. The reliability analysis demonstrates that a permanent magnet generator based wind energy conversion system is not the best option from the point of view of power conditioning system reliability. The analysis also reveals that new research is required to determine a robust power electronics configuration for small wind turbine conversion systems.

Internet Forums for Suicide Bereavement.

Science.gov (United States)

Bailey, Eleanor; Krysinska, Karolina; O'Dea, Bridianne; Robinson, Jo

2017-11-01

Bereavement by suicide is associated with a number of consequences including poor mental health outcomes and increased suicide risk. Despite this, the bereaved by suicide may be reluctant to seek help from friends, family, and professionals. Internet forums and social networking sites are a popular avenue of support for the bereaved, but to date there is a lack of research into their use and efficacy. To survey users of suicide bereavement Internet forums and Facebook groups regarding their help-seeking behaviors, use of forums, and perceived benefits and limitations of such use. This study employed a cross-sectional design in which users of suicide bereavement Internet forums and Facebook groups completed an anonymous online survey. Participants were 222 users of suicide bereavement Internet forums. Most participants (93.2%) had sought face-to-face help from sources other than Internet forums, but were more likely to seek help in the near future from informal rather than formal sources. Forums were perceived as highly beneficial and there were few limitations. The generalizability of these results to other internet forums may be limited. Additionally, we were not able to examine differences between forums in terms of quality or user-reported efficacy. Finally, the data reflects the subjective views of forum users, which may differ from the views of moderators or experts. Internet forums, including Facebook groups, appear to be a useful adjunct to face-to-face help-seeking for supporting those who have been bereaved by suicide.

Estimating the impacts of wind power on power systems—summary of IEA Wind collaboration

Science.gov (United States)

Holttinen, Hannele

2008-04-01

Adding wind power to power systems will have beneficial impacts by reducing the emissions of electricity production and reducing the operational costs of the power system as less fuel is consumed in conventional power plants. Wind power will also have a capacity value to a power system. However, possible negative impacts will have to be assessed to make sure that they will only offset a small part of the benefits and also to ensure the security of the power system operation. An international forum for the exchange of knowledge of power system impacts of wind power has been formed under the IEA Implementing Agreement on Wind Energy. The Task 'Design and Operation of Power Systems with Large Amounts of Wind Power' is analyzing existing case studies from different power systems. There are a multitude of studies completed and ongoing related to the cost of wind integration. However, the results are not easy to compare. This paper describes the general issues of wind power impacts on power systems and presents a comparison of results from ten case studies on increased balancing needs due to wind power.

Estimating the impacts of wind power on power systems-summary of IEA Wind collaboration

International Nuclear Information System (INIS)

Holttinen, Hannele

2008-01-01

Adding wind power to power systems will have beneficial impacts by reducing the emissions of electricity production and reducing the operational costs of the power system as less fuel is consumed in conventional power plants. Wind power will also have a capacity value to a power system. However, possible negative impacts will have to be assessed to make sure that they will only offset a small part of the benefits and also to ensure the security of the power system operation. An international forum for the exchange of knowledge of power system impacts of wind power has been formed under the IEA Implementing Agreement on Wind Energy. The Task 'Design and Operation of Power Systems with Large Amounts of Wind Power' is analyzing existing case studies from different power systems. There are a multitude of studies completed and ongoing related to the cost of wind integration. However, the results are not easy to compare. This paper describes the general issues of wind power impacts on power systems and presents a comparison of results from ten case studies on increased balancing needs due to wind power

Lighting detectives forum

DEFF Research Database (Denmark)

Bülow, Katja; Skindbjerg Kristensen, Lisbeth

2003-01-01

Belysning for boligområder var emnet for lighting detectives forum, der blev afholdt i Stockholm i august 2003.......Belysning for boligområder var emnet for lighting detectives forum, der blev afholdt i Stockholm i august 2003....

Theory of local and global processes which affect solar wind electrons. 2. Experimental support

International Nuclear Information System (INIS)

Scudder, J.D.; Olbert, S.

1979-01-01

We have extended the theoretical considerations of Scudder and Olbert (1979) (hereafter called paper 1) to show from the microscopic characteristics of the Coulomb cross section that there are three natural subpopulations for plasma electrons: the subthermals with local kinetic energy E 7kT/sub c/. We present experimental support from three experimental groups on three different spacecraft over a radial range in the interplanetary medium for the five interrelations projected in paper 1 between solar wind electron properties and changes in the interplanetary medium: (1) subthermals respond primarily to local changes (compressions and rarefactions) in stream dynamics: (2) the extrathermal fraction of the ambient electron density should be anticorrelated with the asymptotic bulk speed; (3) the extrathermal 'temperature' should be anticorrelated with the local wind speed at 1 AU; (4) the heat flux carried by electrons should be anticorrelated with the local bulk speed; and (5) the extrathermal differential 'temperature' should be nearly independent of radius within 1 Au. From first principles and the spatial inhomogeneity of the plasma we show that the velocity dependence of Coulomb collisions in the solar wind plasmaproduces a bifurcation in the solar wind electron distribution function at a transition energy E*. This energy is theoretically shown to scale with the local thermal temperature as E*(r) approx. =GAMMAkT/sub c/(r). This scaling is observationally supported over the radial range from 0.45 to 0.9 AU and at 1 AU. The extrathermals, defined on the basis of Coulomb collisions, are synonymous with the subpopulation previously labeled in the literature as the 'halo' or 'hot' component

The Coincidence Tracker: Electronic Equipment for a Time-of-Flight Wind-Speed Measurement System

DEFF Research Database (Denmark)

Fog, Christian

1982-01-01

The electronic part of a laser-beam measuring system for wind velocity is described. Pulses of light scattered from aerosols are treated, first in a pair of adaptive filters, then in a tracker that calculates the wind velocity on-line while applying some knowledge about the velocity to be expected...

Solar wind ∼0.1-1.5 keV electrons at quiet times

Energy Technology Data Exchange (ETDEWEB)

Tao, Jiawei; Wang, Linghua, E-mail: wanglhwang@gmail.com; Zong, Qiugang; He, Jiansen; Tu, Chuanyi [School of Earth and Space Science, Peking University, Beijing 100871 (China); Li, Gang [Department of Physics and CSPAR, University of Alabama in Huntsville, Alabama 35899 (United States); Salem, Chadi S.; Bale, Stuart D. [Space Sciences Laboratory, University of California, Berkeley, CA 94720 (United States); Wimmer-Schweingruber, Robert F. [Institute for Experimental and Applied Physics, University of Kiel (Germany)

2016-03-25

We present a statistical survey of the energy spectrum of solar wind suprathermal (∼0.1-1.5 keV) electrons measured by the WIND 3-D Plasma & Energetic Particle (3DP) instrument at 1 AU during quiet times at the minimum and maximum of solar cycles 23 and 24. Firstly, we separate strahl (beaming) electrons and halo (isotropic) electrons based on their features in pitch angle distributions. Secondly, we fit the observed energy spectrum of both the strahl and halo electrons at ∼0.1-1.5 keV to a Kappa distribution function with an index κ, effective temperature T{sub eff} and density n{sub 0}. We also integrate the the measurements over ∼0.1-1.5 keV to obtain the average electron energy E{sub avg} of the strahl and halo. We find a strong positive correlation between κ and T{sub eff} for both the strahl and halo, possibly reflecting the nature of the generation of these suprathermal electrons. Among the 245 selected samples, ∼68% have the halo κ smaller than the strahl κ, while ∼50% have the halo E{sub h} larger than the strahl E{sub s}.

Electron energetics in the expanding solar wind via Helios observations

Czech Academy of Sciences Publication Activity Database

Štverák, Štěpán; Trávníček, Pavel M.; Hellinger, Petr

2015-01-01

Roč. 120, č. 10 (2015), s. 8177-8193 ISSN 2169-9380 R&D Projects: GA ČR GAP209/12/2041; GA ČR GA15-17490S Institutional support: RVO:67985815 Keywords : solar wind * electrons energetics * transport processes Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics Impact factor: 3.318, year: 2015

Introduction of an Electronic Forum for Annual Development Planning (A Case Study in Banyuasin Regency, South Sumatra, Indonesia

Directory of Open Access Journals (Sweden)

Irwanto Irwanto

2014-01-01

Full Text Available Indonesian constitution was amended in 1999 and requested for local government to establish bottom up planning process that has been set as a standard approach to accommodate local aspiration in the making of annual development plan. The Musrenbang (Musyawarah Perencanaan Pembangunan/The Deliberation of development Plan was amended by Law No. 25/2004 as the stages of planning formulation process in which stakeholders and Public Administrator sit down for forum to communicate each other to find best means for local problem solution. Musrenbang need to modify since it tend to not work as become effective mechanism to accommodate aspirations of stakeholders (bottom level and hand them over to local government (upper level due to several barriers, such as; geographical distance, limited transportation system, irregular political intervention and bureaucratic red tape. Using Information Communication Technology (ICT that able to simplify the planning process by utilizing the people’s interactions expectedly can make simpler and faster procedure, including maximizing the role of Musrenbang. An Electronic forum for annual development planning will set to improve validity, effectiveness and efficiency. Banyuasin Regency, South Sumatera, Indonesia is now making preparation to introduce this system. PCM method was applied to analyze the problems for its introduction. Keywords: development plan, information communication technology, local government, musrenbang.

LLW Forum meeting report

International Nuclear Information System (INIS)

1996-01-01

This report summarizes the Low-Level Radioactive Waste Forum (LLW Forum) meeting on May 29 through May 31, 1996.The LLW Forum is an association of state and compact representatives, appointed by governors and compact commissions, established to facilitate state and compact implementation of the Low-Level Waste Policy Act of 1980 and the Low-Level Radioactive Waste Policy Amendments Act of 1985 and to promote the objectives of low-level radioactive waste regional compacts. The LLW forum provides an opportunity for state and compact officials to share information with one another and to exchange views with officials of federal agencies and other interested parties

LLW Forum meeting report

Energy Technology Data Exchange (ETDEWEB)

NONE

1996-08-01

This report summarizes the Low-Level Radioactive Waste Forum (LLW Forum) meeting on May 29 through May 31, 1996.The LLW Forum is an association of state and compact representatives, appointed by governors and compact commissions, established to facilitate state and compact implementation of the Low-Level Waste Policy Act of 1980 and the Low-Level Radioactive Waste Policy Amendments Act of 1985 and to promote the objectives of low-level radioactive waste regional compacts. The LLW forum provides an opportunity for state and compact officials to share information with one another and to exchange views with officials of federal agencies and other interested parties.

Powering embedded electronics for wind turbine monitoring using multi-source energy harvesting techniques

Science.gov (United States)

Anton, S. R.; Taylor, S. G.; Raby, E. Y.; Farinholt, K. M.

2013-03-01

With a global interest in the development of clean, renewable energy, wind energy has seen steady growth over the past several years. Advances in wind turbine technology bring larger, more complex turbines and wind farms. An important issue in the development of these complex systems is the ability to monitor the state of each turbine in an effort to improve the efficiency and power generation. Wireless sensor nodes can be used to interrogate the current state and health of wind turbine structures; however, a drawback of most current wireless sensor technology is their reliance on batteries for power. Energy harvesting solutions present the ability to create autonomous power sources for small, low-power electronics through the scavenging of ambient energy; however, most conventional energy harvesting systems employ a single mode of energy conversion, and thus are highly susceptible to variations in the ambient energy. In this work, a multi-source energy harvesting system is developed to power embedded electronics for wind turbine applications in which energy can be scavenged simultaneously from several ambient energy sources. Field testing is performed on a full-size, residential scale wind turbine where both vibration and solar energy harvesting systems are utilized to power wireless sensing systems. Two wireless sensors are investigated, including the wireless impedance device (WID) sensor node, developed at Los Alamos National Laboratory (LANL), and an ultra-low power RF system-on-chip board that is the basis for an embedded wireless accelerometer node currently under development at LANL. Results indicate the ability of the multi-source harvester to successfully power both sensors.

Interplanetary Type III Bursts and Electron Density Fluctuations in the Solar Wind

Science.gov (United States)

Krupar, V.; Maksimovic, M.; Kontar, E. P.; Zaslavsky, A.; Santolik, O.; Soucek, J.; Kruparova, O.; Eastwood, J. P.; Szabo, A.

2018-04-01

Type III bursts are generated by fast electron beams originated from magnetic reconnection sites of solar flares. As propagation of radio waves in the interplanetary medium is strongly affected by random electron density fluctuations, type III bursts provide us with a unique diagnostic tool for solar wind remote plasma measurements. Here, we performed a statistical survey of 152 simple and isolated type III bursts observed by the twin-spacecraft Solar TErrestrial RElations Observatory mission. We investigated their time–frequency profiles in order to retrieve decay times as a function of frequency. Next, we performed Monte Carlo simulations to study the role of scattering due to random electron density fluctuations on time–frequency profiles of radio emissions generated in the interplanetary medium. For simplification, we assumed the presence of isotropic electron density fluctuations described by a power law with the Kolmogorov spectral index. Decay times obtained from observations and simulations were compared. We found that the characteristic exponential decay profile of type III bursts can be explained by the scattering of the fundamental component between the source and the observer despite restrictive assumptions included in the Monte Carlo simulation algorithm. Our results suggest that relative electron density fluctuations /{n}{{e}} in the solar wind are 0.06–0.07 over wide range of heliospheric distances.

Social Relation Networks in UT-Online Community Forum

Science.gov (United States)

Farisi, Mohammad Imam

2012-01-01

So far, the existence of a virtual community forum has become a reality and social necessity in an era cybertech. It was also viewed as the electronic frontier of 21st century society that was undoubtedly for reorganizing and redefining to awareness of human being, that ways of their perceptions and explorations no longer limited by time, space,…

THE EFFECT OF ELECTRON THERMAL PRESSURE ON THE OBSERVED MAGNETIC HELICITY IN THE SOLAR WIND

Energy Technology Data Exchange (ETDEWEB)

Markovskii, S. A.; Vasquez, Bernard J.; Smith, Charles W., E-mail: sergei.markovskii@unh.edu, E-mail: bernie.vasquez@unh.edu, E-mail: charles.smith@unh.edu [Space Science Center, University of New Hampshire, Durham, NH 03824 (United States)

2016-12-20

Statistical analysis of magnetic helicity spectra in the solar wind at 1 au is carried out. A large database of the solar wind intervals assembled from Wind spacecraft magnetic and plasma data is used. The effect of the electron thermal pressure on the wavenumber position of the helicity signature, i.e., the peak of the spectrum, is studied. The position shows a statistically significant dependence on both the electron and proton pressures. However, the strongest dependence is seen when the two pressures are summed. These findings confirm that the generation of the magnetic helicity is associated with an increasing compressibility of the turbulent fluctuations at smaller kinetic scales. It is argued that instrumental artifacts do not contribute to the helicity signature.

MIXING THE SOLAR WIND PROTON AND ELECTRON SCALES: EFFECTS OF ELECTRON TEMPERATURE ANISOTROPY ON THE OBLIQUE PROTON FIREHOSE INSTABILITY

Energy Technology Data Exchange (ETDEWEB)

Maneva, Y.; Lazar, M.; Poedts, S. [Centre for Mathematical Plasma Astrophysics, Celestijnenlaan 200B, 3001 Heverlee (Belgium); Viñas, A., E-mail: yana.maneva@wis.kuleuven.be [NASA Goddard Space Flight Center, Heliophysics Science Division, Greenbelt, MD 20771 (United States)

2016-11-20

The double adiabatic expansion of the nearly collisionless solar wind plasma creates conditions for the firehose instability to develop and efficiently prevent the further increase of the plasma temperature in the direction parallel to the interplanetary magnetic field. The conditions imposed by the firehose instability have been extensively studied using idealized approaches that ignore the mutual effects of electrons and protons. Recently, more realistic approaches have been proposed that take into account the interplay between electrons and protons, unveiling new regimes of the parallel oscillatory modes. However, for oblique wave propagation the instability develops distinct branches that grow much faster and may therefore be more efficient than the parallel firehose instability in constraining the temperature anisotropy of the plasma particles. This paper reports for the first time on the effects of electron plasma properties on the oblique proton firehose (PFH) instability and provides a comprehensive vision of the entire unstable wave-vector spectrum, unifying the proton and the smaller electron scales. The plasma β and temperature anisotropy regimes considered here are specific for the solar wind and magnetospheric conditions, and enable the electrons and protons to interact via the excited electromagnetic fluctuations. For the selected parameters, simultaneous electron and PFH instabilities can be observed with a dispersion spectrum of the electron firehose (EFH) extending toward the proton scales. Growth rates of the PFH instability are markedly boosted by the anisotropic electrons, especially in the oblique direction where the EFH growth rates are orders of magnitude higher.

Mixing the Solar Wind Proton and Electron Scales: Effects of Electron Temperature Anisotropy on the Oblique Proton Firehose Instability

Science.gov (United States)

Maneva, Y.; Lazar, M.; Vinas, A.; Poedts, S.

2016-01-01

The double adiabatic expansion of the nearly collisionless solar wind plasma creates conditions for the firehose instability to develop and efficiently prevent the further increase of the plasma temperature in the direction parallel to the interplanetary magnetic field. The conditions imposed by the firehose instability have been extensively studied using idealized approaches that ignore the mutual effects of electrons and protons. Recently, more realistic approaches have been proposed that take into account the interplay between electrons and protons,? unveiling new regimes of the parallel oscillatory modes. However, for oblique wave propagation the instability develops distinct branches that grow much faster and may therefore be more efficient than the parallel firehose instability in constraining the temperature anisotropy of the plasma particles. This paper reports for the first time on the effects of electron plasma properties on the oblique proton firehose (PFH) instability and provides a comprehensive vision of the entire unstable wave-vector spectrum, unifying the proton and the smaller electron scales. The plasma ß and temperature anisotropy regimes considered here are specific for the solar wind and magnetospheric conditions, and enable the electrons and protons to interact via the excited electromagnetic fluctuations. For the selected parameters, simultaneous electron and PFH instabilities can be observed with a dispersion spectrum of the electron firehose (EFH) extending toward the proton scales. Growth rates of the PFH instability are markedly boosted by the anisotropic electrons, especially in the oblique direction where the EFH growth rates are orders of magnitude higher.

Resolving Environmental Effects of Wind Energy

Energy Technology Data Exchange (ETDEWEB)

Sinclair, Karin C [National Renewable Energy Laboratory (NREL), Golden, CO (United States); DeGeorge, Elise M [National Renewable Energy Laboratory (NREL), Golden, CO (United States); Copping, Andrea E. [Pacific Northwest National Laboratory; May, Roel [Norwegian Institute for Nature Research; Bennet, Finlay [Marine Scotland Science; Warnas, Marijke [Rijkswaterstaat; Perron, Muriel [nateco AG; Elmqvist, Asa [Swedish Environmental Protection Agency

2018-04-25

Concerns for potential wildlife impacts resulting from land-based and offshore wind energy have created challenges for wind project development. Research is not always adequately supported, results are neither always readily accessible nor are they satisfactorily disseminated, and so decisions are often made based on the best available information, which may be missing key findings. The potential for high impacts to avian and bat species and marine mammals have been used by wind project opponents to stop, downsize, or severely delay project development. The global nature of the wind industry - combined with the understanding that many affected species cross-national boundaries, and in many cases migrate between continents - also points to the need to collaborate on an international level. The International Energy Agency (IEA) Wind Technology Collaborative Programs facilitates coordination on key research issues. IEA Wind Task 34 - WREN: Working Together to Resolve Environmental Effects of Wind Energy-is a collaborative forum to share lessons gained from field research and modeling, including management methods, wildlife monitoring methods, best practices, study results, and successful approaches to mitigating impacts and addressing the cumulative effects of wind energy on wildlife.

Forum on orthophotography: Summary Report

Science.gov (United States)

,

1990-01-01

A Forum on Orthophotography was held on May 15, 1990, at the National Aeronautics and Space Administration's Goddard Space Flight Center in Greenbelt, Maryland. The forum was sponsored jointly by the U.S. Soil Conservation Service, the U.S. Geological Survey, the National Governors' Association, and the National Association of Counties. The purpose of the forum was to expand the understanding and use of orthophoto products among the user community, as well as among those currently considering, or as yet unfamiliar with, the use of these products. It was also intended to provide a forum for assessing requirements for, and interest in, orthophoto products and for the identification and discussion of issues and future needs concerning orthophoto use and coordination. The 1-day forum was organized into three major sessions that focussed on technical aspects, user applications, and management issues. The first session presented a brief background and overview of the technical characteristics of standard and digital orthophotos. The second session included formal presentations by Federal, State, and county government agencies on their current and planned applications of orthophoto products, with particular emphasis on their use within geographic information systems. In the third session, private industry addressed their community's interest, capabilities, and potential role. This session also included a proposal by the U.S. Soil Conservation Service for a national cooperative program for the production of l:12,000-scale orthophotoquad products. In addition to the formal presentations, the forum provided a time for open discussion in which attendees had an opportunity to exchange information and make statements about their needs or other items pertinent to the production and dissemination of orthophoto products. Several agency orthophoto product exhibits and interactive demonstrations were also available throughout the day. This report includes a forum agenda and

A theory of local and global processes which affect solar wind electrons. 2. Experimental support

International Nuclear Information System (INIS)

Scudder, J.D.; Olbert, S.

1979-05-01

The microscopic characteristics of the Coulomb cross section show that there are three natural subpopulations for plasma electrons: the subthermals; the transthermals; and the extrathermals. Data from three experimental groups on three different spacecraft in the interplanetary medium over a radial range are presented to support the five interrelations projected between solar wind electron properties and changes in the interplanetary medium: (1) subthermals respond primarily to local changes (compression and rarefactions) in stream dynamics; (2) the extrathermal fraction of the ambient electron density should be anti-correlated with the asymptotic bulk speed; (3) the extrathermal 'temperature' should be anti-correlated with the local wind speed at 1 AU; (4) the heat flux carried by electrons should be anti-correlated with the local bulk speed; and (5) the extrathermal differential 'temperature' should be nearly independent of radius within 1 AU

On the Relationship Between High Speed Solar Wind Streams and Radiation Belt Electron Fluxes

Science.gov (United States)

Zheng, Yihua

2011-01-01

Both past and recent research results indicate that solar wind speed has a close connection to radiation belt electron fluxes [e.g., Paulikas and Blake, 1979; Reeves et aI., 2011]: a higher solar wind speed is often associated with a higher level of radiation electron fluxes. But the relationship can be very complex [Reeves et aI., 2011]. The study presented here provides further corroboration of this viewpoint by emphasizing the importance of a global perspective and time history. We find that all the events during years 2010 and 2011 where the >0.8 MeV integral electron flux exceeds 10(exp 5) particles/sq cm/sr/s (pfu) at GEO orbit are associated with the high speed streams (HSS) following the onset of the Stream Interaction Region (SIR), with most of them belonging to the long-lasting Corotating Interaction Region (CIR). Our preliminary results indicate that during HSS events, a maximum speed of 700 km/s and above is a sufficient but not necessary condition for the > 0.8 MeV electron flux to reach 10(exp 5) pfu. But in the exception cases of HSS events where the electron flux level exceeds the 10(exp 5) pfu value but the maximum solar wind speed is less than 700 km/s, a prior impact can be noted either from a CME or a transient SIR within 3-4 days before the arrival of the HSS - stressing the importance of time history. Through superposed epoch analysis and studies providing comparisons with the CME events and the HSS events where the flux level fails to reach the 10(exp 5) pfu, we will present the quantitative assessment of behaviors and relationships of various quantities, such as the time it takes to reach the flux threshold value from the stream interface and its dependence on different physical parameters (e.g., duration of the HSS event, its maximum or average of the solar wind speed, IMF Bz, Kp). The ultimate goal is to apply what is derived to space weather forecasting.

Carbon sequestration leadership forum

Energy Technology Data Exchange (ETDEWEB)

NONE

2003-07-01

The Carbon Sequestration Leadership Forum (CSLF) is an international climate change initiative that will focus on development of carbon capture and storage technologies as a means of accomplishing long-term stabilisation of greenhouse gas levels in the atmosphere. This initiative is designed to improve these technologies through coordinated research and development with international partners and private industry. Three types of cooperation are currently envisioned within the framework of the Forum: data gathering, information exchange, and joint projects. Data gathered from participating countries will be aggregated, summarised, and distributed to all of the Forum's participants. Joint projects will be identified by member nations with the Forum serving as a mechanism for bringing together government and private sector representatives from member countries. The article also reports the inaugural meeting which was held 23-25 June 2003 in Washington.

Final Report DE-EE0005380: Assessment of Offshore Wind Farm Effects on Sea Surface, Subsurface and Airborne Electronic Systems

Energy Technology Data Exchange (ETDEWEB)

Ling, Hao [The University of Texas at Austin; Hamilton, Mark F. [The University of Texas at Austin Applied Research Laboratories; Bhalla, Rajan [Science Applications International Corporation; Brown, Walter E. [The University of Texas at Austin Applied Research Laboratories; Hay, Todd A. [The University of Texas at Austin Applied Research Laboratories; Whitelonis, Nicholas J. [The University of Texas at Austin; Yang, Shang-Te [The University of Texas at Austin; Naqvi, Aale R. [The University of Texas at Austin

2013-09-30

Offshore wind energy is a valuable resource that can provide a significant boost to the US renewable energy portfolio. A current constraint to the development of offshore wind farms is the potential for interference to be caused by large wind farms on existing electronic and acoustical equipment such as radar and sonar systems for surveillance, navigation and communications. The US Department of Energy funded this study as an objective assessment of possible interference to various types of equipment operating in the marine environment where offshore wind farms could be installed. The objective of this project was to conduct a baseline evaluation of electromagnetic and acoustical challenges to sea surface, subsurface and airborne electronic systems presented by offshore wind farms. To accomplish this goal, the following tasks were carried out: (1) survey electronic systems that can potentially be impacted by large offshore wind farms, and identify impact assessment studies and research and development activities both within and outside the US, (2) engage key stakeholders to identify their possible concerns and operating requirements, (3) conduct first-principle modeling on the interactions of electromagnetic signals with, and the radiation of underwater acoustic signals from, offshore wind farms to evaluate the effect of such interactions on electronic systems, and (4) provide impact assessments, recommend mitigation methods, prioritize future research directions, and disseminate project findings. This report provides a detailed description of the methodologies used to carry out the study, key findings of the study, and a list of recommendations derived based the findings.

Investigation of the winds and electron concentration variability in the D region of the ionosphere by the partial-reflection radar technique

International Nuclear Information System (INIS)

Weiland, R.M.; Bowhill, S.A.

1981-12-01

The development and first observations of the partial-reflection drifts experiment at Urbana, Illinois (40 N) are described. The winds data from the drifts experiment are compared with electron concentration data obtained by the differential-absorption technique to study the possible meteorological causes of the winter anomaly in the mesosphere at midlatitudes. Winds data obtained by the meteor-radar experiment at Urbana are also compared with electron concentration data measured at Urban. A significant correlation is shown is both cases between southward winds and increasing electron concentration measured at the same location during winter. The possibility of stratospheric/mesospheric coupling is investigated by comparing satellite-measured 0.4 mbar geopotential data with mesospheric electron concentration data. No significant coupling was observed. The winds measured at Saskatoon, Saskatchewan (52 N) are compared with the electron concentrations measured at Urban, yielding constant fixed relationship, but significant correlations for short segments of the winter. A significant coherence is observed at discrete frequencies during segments of the winter

Special Tests for the Power Electronic Converters of Wind Turbine Generators

DEFF Research Database (Denmark)

Helle, Lars; Senturk, Osman Selcuk; Teodorescu, Remus

2011-01-01

-level medium-voltage source converter topologies, of the 3L-ANPC-VSC and 3L-HB-VSC type, are considered in the paper. Both converters employ press-pack IGBT-diode pairs and interface a 6 MW wind turbine to a medium voltage grid. The power loss and thermal model data applicable for both grid and generator......Power electronic converters for wind turbines are characterized by high specific power density and high reliability. Special tests for such converters are performed in order to determine the power loss and thermal models, which are dependent of the load profile and converter structure. Two multi......-side VSCs is used to estimate the switch junction temperatures through the simulation of wind turbine grid interface operation. A discussion of the power density and reliability of the grid-side VSCs with respect to press-pack switches, gate driver, and cooling plate is included. A test set-up for a single...

Developers@CERN Forums: Python

CERN Multimedia

CERN. Geneva

2016-01-01

The Developers@CERN Forums second edition took place at the end of May on the topic of Python. How do developers at CERN interact with Python? Which cutting-edge projects are using Python? What were the highlights of this most recent forum?

QUIET-TIME SUPRATHERMAL (∼0.1–1.5 keV) ELECTRONS IN THE SOLAR WIND

Energy Technology Data Exchange (ETDEWEB)

Tao, Jiawei; Wang, Linghua; Zong, Qiugang; He, Jiansen; Tu, Chuanyi [School of Earth and Space Science, Peking University, Beijing 100871 (China); Li, Gang [Department of Physics and CSPAR, University of Alabama in Huntsville, Alabama 35899 (United States); Salem, Chadi S.; Bale, Stuart D. [Space Sciences Laboratory, University of California, Berkeley, CA 94720 (United States); Wimmer-Schweingruber, Robert F., E-mail: wanglhwang@gmail.com [Institute for Experimental and Applied Physics, University of Kiel, Leibnizstrasse 11, D-24118 Kiel (Germany)

2016-03-20

We present a statistical survey of the energy spectrum of solar wind suprathermal (∼0.1–1.5 keV) electrons measured by the WIND 3DP instrument at 1 AU during quiet times at the minimum and maximum of solar cycles 23 and 24. After separating (beaming) strahl electrons from (isotropic) halo electrons according to their different behaviors in the angular distribution, we fit the observed energy spectrum of both strahl and halo electrons at ∼0.1–1.5 keV to a Kappa distribution function with an index κ and effective temperature T{sub eff}. We also calculate the number density n and average energy E{sub avg} of strahl and halo electrons by integrating the electron measurements between ∼0.1 and 1.5 keV. We find a strong positive correlation between κ and T{sub eff} for both strahl and halo electrons, and a strong positive correlation between the strahl n and halo n, likely reflecting the nature of the generation of these suprathermal electrons. In both solar cycles, κ is larger at solar minimum than at solar maximum for both strahl and halo electrons. The halo κ is generally smaller than the strahl κ (except during the solar minimum of cycle 23). The strahl n is larger at solar maximum, but the halo n shows no difference between solar minimum and maximum. Both the strahl n and halo n have no clear association with the solar wind core population, but the density ratio between the strahl and halo roughly anti-correlates (correlates) with the solar wind density (velocity)

The International Technical Safety Forum

CERN Multimedia

CERN Bulletin

2010-01-01

The International Technical Safety Forum is a meeting of safety experts from several physics labs in Europe and the US. Since 1998 participants have been meeting every couple of years to discuss common challenges in safety matters. The Forum helps them define best practices and learn from the important lessons learned by others.   The Forum's participants in front of building 40. This year, the meeting took place at CERN from 12 to 16 April. “This year's meeting covered subjects ranging from communication and training in matters of safety, to cryogenic safety, emergency preparedness and risk analysis”, explains Ralf Trant, head of the CERN Safety Commission and organiser of this year’s Forum. Radiation protection issues are not discussed at the meeting since they involve different expertise. The goal of the Forum is to allow participants to share experience, learn lessons and acquire specific knowledge in a very open way. Round-table discussions, dedicated time for ...

Solar Wind Electron Scattering by Kinetic Instabilities and Whistler Turbulence

Science.gov (United States)

Gary, S. P.

2015-12-01

The expansion of the solar wind away from the Sun drives electron velocity distributions away from the thermal Maxwellian form, yielding distributions near 1 AU which typically can be characterized as consisting of three anisotropic components: a more dense, relatively cool core, a relatively tenuous , relatively warm halo and a similarly tenuous, warm strahl. Each of these nonthermal components are potential sources of kinetic plasma instabilities; the enhanced waves from each instability can scatter the electrons, acting to reduce the various anisotropies and making their overall velocity distribution more nearly (but not completely) thermal. In contrast, simulations are demonstrating that the forward decay of whistler turbulence can lead to the development of a T||> T_perp electron anisotropy. This presentation will review linear theories of electron-driven kinetic instabilities (following the presentation by Daniel Verscharen at the 2015 SHINE Workshop), and will further consider the modification of electron velocity distributions as obtained from particle-in-cell simulations of such instabilities as well as from the decay of whistler turbulence.

CERN hosts Physics and Society Forum

CERN Multimedia

Katarina Anthony

2012-01-01

On 28-29 March, CERN hosted the fifth edition of the European Physical Society's “Physics and Society” forum. The forum addresses the role of physicists in general society – be they in education, politics, industry or communication. This year, attendees looked at how physicists have adapted - and can continue to adapt - to work in the economic marketplace.   “The forums began back in 2006, as a special closing event for the 2005 World Year of Physics,” explains Martial Ducloy, former President of the French Physical Society and Chair of the EPS Forum Physics and Society. “We decided to keep the sessions going, as they gave physicists a venue to discuss the non-scientific issues that influence their daily work. As the world's largest international physics laboratory – and the venue for this year's EPS Council – CERN seemed the ideal place to host this year's forum.” The forum ...

Water Finance Webinars and Forums

Science.gov (United States)

The Center hosts a series of water finance forums. These forums bring together communities with drinking water, wastewater, and stormwater project financing needs in an interactive peer-to-peer networking format.

Langmuir wave-packet generation from an electron beam propagating in the inhomogeneous solar wind

International Nuclear Information System (INIS)

Zaslavsky, A.; Maksimovic, M.; Volokitin, A. S.; Krasnoselskikh, V. V.; Bale, S. D.

2010-01-01

Recent in-situ observations by the TDS instrument equipping the STEREO spacecraft revealed that large amplitude spatially localized Langmuir waves are frequent in the solar wind, and correlated with the presence of suprathermal electron beams during type III events or close to the electron foreshock. We briefly present the new theoretical model used to perform the study of these localized electrostatic waves, and show first results of simulations of the destabilization of Langmuir waves by a beam propagating in the inhomogeneous solar wind. The main results are that the destabilized waves are mainly focalized near the minima of the density profiles, and that the nonlinear interaction of the waves with the resonant particles enhances this focalization compared to a situation in which the only propagation effects are taken into account.

ECNS '99 - Young scientists forum

DEFF Research Database (Denmark)

Ceretti, M.; Janssen, S.; McMorrow, D.F.

2000-01-01

The Young Scientists Forum is a new venture for ECNS and follows the established tradition of an active participation by young scientists in these conferences. At ECNS '99 the Young Scientists Forum brought together 30 young scientists from 13 European countries. In four working groups, they disc......The Young Scientists Forum is a new venture for ECNS and follows the established tradition of an active participation by young scientists in these conferences. At ECNS '99 the Young Scientists Forum brought together 30 young scientists from 13 European countries. In four working groups......, they discussed emerging scientific trends in their areas of expertise and the instrumentation required to meet the scientific challenges. The outcome was presented in the Young Scientists Panel on the final day of ECNS '99. This paper is a summary of the four working group reports prepared by the Group Conveners...

Average profiles of the solar wind and outer radiation belt during the extreme flux enhancement of relativistic electrons at geosynchronous orbit

Directory of Open Access Journals (Sweden)

R. Kataoka

2008-06-01

Full Text Available We report average profiles of the solar wind and outer radiation belt during the extreme flux enhancement of relativistic electrons at geosynchronous orbit (GEO. It is found that seven of top ten extreme events at GEO during solar cycle 23 are associated with the magnetosphere inflation during the storm recovery phase as caused by the large-scale solar wind structure of very low dynamic pressure (<1.0 nPa during rapid speed decrease from very high (>650 km/s to typical (400–500 km/s in a few days. For the seven events, the solar wind parameters, geomagnetic activity indices, and relativistic electron flux and geomagnetic field at GEO are superposed at the local noon period of GOES satellites to investigate the physical cause. The average profiles support the "double inflation" mechanism that the rarefaction of the solar wind and subsequent magnetosphere inflation are one of the best conditions to produce the extreme flux enhancement at GEO because of the excellent magnetic confinement of relativistic electrons by reducing the drift loss of trapped electrons at dayside magnetopause.

DTU contributions to IEA Wind Annex 25 Phase 2

DEFF Research Database (Denmark)

Sørensen, Poul Ejnar; Cutululis, Nicolaos Antonio; Meibom, Peter

The objective of Task 25 is to analyse and further develop the methodology to assess the impact of wind power on power systems. The Task has established an international forum for exchange of knowledge and experiences related to power system operation with large amounts of wind power and has...... and design, mainly: balancing, grid impacts and capacity credit of wind power. In the meetings, all participants have made presentations of the wind integration issues in their country, results so far and on-going activities. In the latest meetings presentations have been grouped to different topics...... actively followed parallel activities with Transmission System Operators other R&D Task work. The participants have collected and shared information on the experience gained and the studies made up to and during the task. The case studies have addressed different aspects of power system operation...

Improved Offshore Wind Resource Assessment in Global Climate Stabilization Scenarios

Energy Technology Data Exchange (ETDEWEB)

Arent, D.; Sullivan, P.; Heimiller, D.; Lopez, A.; Eurek, K.; Badger, J.; Jorgensen, H. E.; Kelly, M.; Clarke, L.; Luckow, P.

2012-10-01

This paper introduces a technique for digesting geospatial wind-speed data into areally defined -- country-level, in this case -- wind resource supply curves. We combined gridded wind-vector data for ocean areas with bathymetry maps, country exclusive economic zones, wind turbine power curves, and other datasets and relevant parameters to build supply curves that estimate a country's offshore wind resource defined by resource quality, depth, and distance-from-shore. We include a single set of supply curves -- for a particular assumption set -- and study some implications of including it in a global energy model. We also discuss the importance of downscaling gridded wind vector data to capturing the full resource potential, especially over land areas with complex terrain. This paper includes motivation and background for a statistical downscaling methodology to account for terrain effects with a low computational burden. Finally, we use this forum to sketch a framework for building synthetic electric networks to estimate transmission accessibility of renewable resource sites in remote areas.

Finding Question-Answer Pairs from Online Forums

DEFF Research Database (Denmark)

Cong, Gao; Wang, Long; Lin, Chin-Yew

2008-01-01

Online forums contain a huge amount of valuable user generated content. In this paper we address the problem of extracting question-answer pairs from forums. Question-answer pairs extracted from forums can be used to help Question Answering services (e.g. Yahoo! Answers) among other applications...

New York State Forum for Information Resource Management: 1998-1999 Annual Report.

Science.gov (United States)

New York State Forum for Information Resource Management.

This annual report of the New York State Forum for Information Resource Management begins with a section that summarizes key activities for 1998-99, including partnerships with other organizations, sessions on the use of information in government and information security, programs on the challenges of electronic commerce for government,…

Power Electronic Drives, Controls, and Electric Generators for Large Wind Turbines - An Overview

DEFF Research Database (Denmark)

Ma, Ke; Tutelea, L.; Boldea, Ion

2015-01-01

and exceed a power rating of 10 MW are discussed. The role of power electronics for improving the operation of wind turbines and ensuring compliance with power grid codes is analyzed with a view at producing fully controllable generation units suitable for tight integration into the power grid and large...

Analysis of trends between solar wind velocity and energetic electron fluxes at geostationary orbit using the reverse arrangement test

Science.gov (United States)

Aryan, Homayon; Boynton, Richard J.; Walker, Simon N.

2013-02-01

A correlation between solar wind velocity (VSW) and energetic electron fluxes (EEF) at the geosynchronous orbit was first identified more than 30 years ago. However, recent studies have shown that the relation between VSW and EEF is considerably more complex than was previously suggested. The application of process identification technique to the evolution of electron fluxes in the range 1.8 - 3.5 MeV has also revealed peculiarities in the relation between VSW and EEF at the geosynchronous orbit. It has been revealed that for a constant solar wind density, EEF increase with VSW until a saturation velocity is reached. Beyond the saturation velocity, an increase in VSW is statistically not accompanied with EEF enhancement. The present study is devoted to the investigation of saturation velocity and its dependency upon solar wind density using the reverse arrangement test. In general, the results indicate that saturation velocity increases as solar wind density decreases. This implies that solar wind density plays an important role in defining the relationship between VSW and EEF at the geosynchronous orbit.

Wind Energy Systems

DEFF Research Database (Denmark)

Blaabjerg, Frede; Ma, Ke

2017-01-01

transmission networks at the scale of hundreds of megawatts. As its level of grid penetration has begun to increase dramatically, wind power is starting to have a significant impact on the operation of the modern grid system. Advanced power electronics technologies are being introduced to improve......Wind power now represents a major and growing source of renewable energy. Large wind turbines (with capacities of up to 6-8 MW) are widely installed in power distribution networks. Increasing numbers of onshore and offshore wind farms, acting as power plants, are connected directly to power...... the characteristics of the wind turbines, and make them more suitable for integration into the power grid. Meanwhile, there are some emerging challenges that still need to be addressed. This paper provides an overview and discusses some trends in the power electronics technologies used for wind power generation...

Birds and wind turbines: can they co-exist?

International Nuclear Information System (INIS)

1996-01-01

This one-day seminar was intended to provide a forum for information exchange and discussion between those concerned with the potential effects of wind turbines on bird life and to produce recommendations that would be helpful in future wind power developments, environmental impact assessments and related research activities. The six papers presented cover the following topics: impacts, mitigation and monitoring of collisions, disturbance in the construction phase and habitat loss; bird protection and the law with particular reference to the burden of proof required from developers in a planning context in the United Kingdom; continuing studies on the birds of Blyth Harbour in the UK where nine 300kW wind turbines are mounted on a pier jutting out into the sea; an overview of European and American experience; the policy and experience of the Royal Society for the Protection of Birds; wind farm design in the light of previous experience. The discussion arising out of each paper is summarised. (UK)

Statistics of counter-streaming solar wind suprathermal electrons at solar minimum: STEREO observations

Directory of Open Access Journals (Sweden)

B. Lavraud

2010-01-01

Full Text Available Previous work has shown that solar wind suprathermal electrons can display a number of features in terms of their anisotropy. Of importance is the occurrence of counter-streaming electron patterns, i.e., with "beams" both parallel and anti-parallel to the local magnetic field, which is believed to shed light on the heliospheric magnetic field topology. In the present study, we use STEREO data to obtain the statistical properties of counter-streaming suprathermal electrons (CSEs in the vicinity of corotating interaction regions (CIRs during the period March–December 2007. Because this period corresponds to a minimum of solar activity, the results are unrelated to the sampling of large-scale coronal mass ejections, which can lead to CSE owing to their closed magnetic field topology. The present study statistically confirms that CSEs are primarily the result of suprathermal electron leakage from the compressed CIR into the upstream regions with the combined occurrence of halo depletion at 90° pitch angle. The occurrence rate of CSE is found to be about 15–20% on average during the period analyzed (depending on the criteria used, but superposed epoch analysis demonstrates that CSEs are preferentially observed both before and after the passage of the stream interface (with peak occurrence rate >35% in the trailing high speed stream, as well as both inside and outside CIRs. The results quantitatively show that CSEs are common in the solar wind during solar minimum, but yet they suggest that such distributions would be much more common if pitch angle scattering were absent. We further argue that (1 the formation of shocks contributes to the occurrence of enhanced counter-streaming sunward-directed fluxes, but does not appear to be a necessary condition, and (2 that the presence of small-scale transients with closed-field topologies likely also contributes to the occurrence of counter-streaming patterns, but only in the slow solar wind prior to

Understanding user intents in online health forums.

Science.gov (United States)

Zhang, Thomas; Cho, Jason H D; Zhai, Chengxiang

2015-07-01

Online health forums provide a convenient way for patients to obtain medical information and connect with physicians and peers outside of clinical settings. However, large quantities of unstructured and diversified content generated on these forums make it difficult for users to digest and extract useful information. Understanding user intents would enable forums to find and recommend relevant information to users by filtering out threads that do not match particular intents. In this paper, we derive a taxonomy of intents to capture user information needs in online health forums and propose novel pattern-based features for use with a multiclass support vector machine (SVM) classifier to classify original thread posts according to their underlying intents. Since no dataset existed for this task, we employ three annotators to manually label a dataset of 1192 HealthBoards posts spanning four forum topics. Experimental results show that a SVM using pattern-based features is highly capable of identifying user intents in forum posts, reaching a maximum precision of 75%, and that a SVM-based hierarchical classifier using both pattern and word features outperforms its SVM counterpart that uses only word features. Furthermore, comparable classification performance can be achieved by training and testing on posts from different forum topics.

Neo-Nazis Sympathizers on the Forums of the Romanian Online Publications

Directory of Open Access Journals (Sweden)

Elena-Irina Macovei

2013-08-01

Full Text Available The research aims to highlight how the forums of the Romanian online publications may often become spaces for right-wing extremist propaganda. The case study includes about 1.000 comments of the readers, expressed on the articles about a protest of several intellectuals against a TV program of the Romanian public Television (TVR, where Corneliu Zelea Codreanu, the founder of the Iron Guard, a Nazi organization created in 1927, was presented as a romantic hero. The results of the content analysis of comments revealed the stigmatizing themes, the stereotypes and the extremist ideas identified on the forums of these articles. In addition, the comparison between the electronic platforms of the publications showed the importance of their features and of the characteristics of audiences regarding the content of the comments.

Sustainable Electronic Roadmap and Forum Summary; Sustainable Electronics Forum, October 15-18, 2012, Racine, WI

Science.gov (United States)

The Roadmap presents critical issues and research questions for each theme. For Theme 1, the issues for limiting the harm from materials and process in electronics industry include identifying the chemicals in products, production process, in the extraction of virgin materials, i...

Effects of non-Maxwellian electron velocity distribution functions and nonspherical geometry on minor ions in the solar wind

Science.gov (United States)

Burgi, A.

1987-01-01

A previous model has shown that in order to account for the charge state distribution in the low-speed solar wind, a high coronal temperature is necessary and that this temperature peak goes together with a peak of nx/np in the corona. In the present paper, one of the assumptions made previously, i.e., that coronal electrons are Maxwellian, is relaxed, and a much cooler model is presented, which could account for the same oxygen charge states in the solar wind due to the inclusion of non-Maxwellian electrons. Also, due to a different choice of the coronal magnetic field geometry, this model would show no enhancement of the coronal nx/np. Results of the two models are then compared, and observational tests to distinguish between the two scenarios are proposed: comparison of directly measured coronal Te to charge state measurements in the solar wind, determination of the coronal nx/np measurement of ion speeds in the acceleration region of the solar wind, and measurement of the frozen-in silicon charge state distribution.

New England Wind Energy Education Project (NEWEEP)

Energy Technology Data Exchange (ETDEWEB)

Grace, Robert C.; Craddock, Kathryn A.; von Allmen, Daniel R.

2012-04-25

Project objective is to develop and disseminate accurate, objective information on critical wind energy issues impacting market acceptance of hundreds of land-based projects and vast off-shore wind developments proposed in the 6-state New England region, thereby accelerating the pace of wind installation from today's 140 MW towards the region's 20% by 2030 goals of 12,500 MW. Methodology: This objective will be accomplished by accumulating, developing, assembling timely, accurate, objective and detailed information representing the 'state of the knowledge' on critical wind energy issues impacting market acceptance, and widely disseminating such information. The target audience includes state agencies and local governments; utilities and grid operators; wind developers; agricultural and environmental groups and other NGOs; research organizations; host communities and the general public, particularly those in communities with planned or operating wind projects. Information will be disseminated through: (a) a series of topic-specific web conference briefings; (b) a one-day NEWEEP conference, back-to-back with a Utility Wind Interest Group one-day regional conference organized for this project; (c) posting briefing and conference materials on the New England Wind Forum (NEWF) web site and featuring the content on NEWF electronic newsletters distributed to an opt-in list of currently over 5000 individuals; (d) through interaction with and participation in Wind Powering America (WPA) state Wind Working Group meetings and WPA's annual All-States Summit, and (e) through the networks of project collaborators. Sustainable Energy Advantage, LLC (lead) and the National Renewable Energy Laboratory will staff the project, directed by an independent Steering Committee composed of a collaborative regional and national network of organizations. Major Participants - the Steering Committee: In addition to the applicants, the initial collaborators committing

Precision Electron Density Measurements in the SSX MHD Wind Tunnel

Science.gov (United States)

Suen-Lewis, Emma M.; Barbano, Luke J.; Shrock, Jaron E.; Kaur, Manjit; Schaffner, David A.; Brown, Michael R.

2017-10-01

We characterize fluctuations of the line averaged electron density of Taylor states produced by the magnetized coaxial plasma gun of the SSX device using a 632.8 nm HeNe laser interferometer. The analysis method uses the electron density dependence of the refractive index of the plasma to determine the electron density of the Taylor states. Typical magnetic field and density values in the SSX device approach about B ≅ 0.3 T and n = 0 . 4 ×1016 cm-3 . Analysis is improved from previous density measurement methods by developing a post-processing method to remove relative phase error between interferometer outputs and to account for approximately linear phase drift due to low-frequency mechanical vibrations of the interferometer. Precision density measurements coupled with local measurements of the magnetic field will allow us to characterize the wave composition of SSX plasma via density vs. magnetic field correlation analysis, and compare the wave composition of SSX plasma with that of the solar wind. Preliminary results indicate that density and magnetic field appear negatively correlated. Work supported by DOE ARPA-E ALPHA program.

The Czechoslovak nuclear forum

International Nuclear Information System (INIS)

Kadlec, J.

1992-01-01

The Czechoslovak Nuclear Forum is a civic initiative that is involved with the safe, economically efficient and generally acceptable development of nuclear power. Its efforts are aimed at incorporation into a broader European context. The Forum is a FORATOM member organization. Its activities are intended to contribute to the establishment of a favorable climate for a further progress of nuclear power in elected bodies (Parliament, municipal and district authorities), in mass media and among the public. (M.D.)

Variability of the Magnetic Field Power Spectrum in the Solar Wind at Electron Scales

Science.gov (United States)

Roberts, Owen Wyn; Alexandrova, O.; Kajdič, P.; Turc, L.; Perrone, D.; Escoubet, C. P.; Walsh, A.

2017-12-01

At electron scales, the power spectrum of solar-wind magnetic fluctuations can be highly variable and the dissipation mechanisms of the magnetic energy into the various particle species is under debate. In this paper, we investigate data from the Cluster mission’s STAFF Search Coil magnetometer when the level of turbulence is sufficiently high that the morphology of the power spectrum at electron scales can be investigated. The Cluster spacecraft sample a disturbed interval of plasma where two streams of solar wind interact. Meanwhile, several discontinuities (coherent structures) are seen in the large-scale magnetic field, while at small scales several intermittent bursts of wave activity (whistler waves) are present. Several different morphologies of the power spectrum can be identified: (1) two power laws separated by a break, (2) an exponential cutoff near the Taylor shifted electron scales, and (3) strong spectral knees at the Taylor shifted electron scales. These different morphologies are investigated by using wavelet coherence, showing that, in this interval, a clear break and strong spectral knees are features that are associated with sporadic quasi parallel propagating whistler waves, even for short times. On the other hand, when no signatures of whistler waves at ∼ 0.1{--}0.2{f}{ce} are present, a clear break is difficult to find and the spectrum is often more characteristic of a power law with an exponential cutoff.

London International Youth Science Forum

Science.gov (United States)

Auty, Geoff

2010-01-01

In this article, the author discusses the 2010 London International Youth Science Forum (LIYSF) and shares his experience in attending the forum. Unlike the Harry Messel event in Sydney, which takes place every two years, LIYSF is an annual event. Before moving to Imperial College London, LIYSF was held at the Institute of Electrical Engineers and…

76 FR 71081 - Public Aircraft Oversight Safety Forum

Science.gov (United States)

2011-11-16

... NATIONAL TRANSPORTATION SAFETY BOARD Public Aircraft Oversight Safety Forum The National Transportation Safety Board (NTSB) will convene a Public Aircraft Oversight Safety Forum which will begin at 9 a... ``Public Aircraft Oversight Forum: Ensuring Safety for Critical Missions'', are to (1) raise awareness of...

SAMJ FORUM

African Journals Online (AJOL)

2006-09-01

Sep 1, 2006 ... SAMJ FORUM. 862. Undernutrition, brain growth and intellectual development ... They were matched for age and sex with a control group of 11 ... of the average weight for Cape Coloured children of this age.' Thus was the ...

Forum, Dedicated to Inclusive Education

Directory of Open Access Journals (Sweden)

Vachkov I.V.

2015-06-01

Full Text Available 26 – 27 of February 2015 in Kazan, in the University of Management “TISBI” been held National (All-Russian forum of promotion of ideas and principles of inclusive education (with international participants “Study and live together: open space of inclusion”. During the work of Forum the most topical questions of inclusive education implement in Russian Federation been discussed.

Impacts of Large Amounts of Wind Power on Design and Operation of Power Systems; Results of IEA Collaboration

Energy Technology Data Exchange (ETDEWEB)

Parsons, B. [National Renewable Energy Lab. (NREL), Golden, CO (United States); Ela, E. [National Renewable Energy Lab. (NREL), Golden, CO (United States); Holttinen, H. [VTT (Finland); Meibom, P. [DTU Riso (Denmark); Orths, A. [Energinet.dk (Denmark); O' Malley, M. [Univ. College Dubline (Ireland); Ummels, B. C. [Delft Univ. of Technology (Netherlands); Tande, J. [SINTEF (Norway); Estanqueiro, A. [INETI (Portugal); Gomez, E. [Univ. Castilla la Mancha (Spain); Smith, J. C. [Utility Wind Integration Group (UWIG), Reston, VA (United States)

2008-06-01

There are a multitude of studies completed and ongoing related to the cost of wind integration. However, the results are not easy to compare. An international forum for exchange of knowledge of power system impacts of wind power has been formed under the IEA Implementing Agreement on Wind Energy. IEA WIND R&D Task 25 on “Design and Operation of Power Systems with Large Amounts of Wind Power” produced a state-of-the-art report in October 2007, where the most relevant wind-power grid integration studies were analyzed, especially regarding methodologies and input data. This paper summarizes the results from 18 case studies, with discussion on differences in methodology as well as issues that have been identified to impact the cost of wind integration.

Suisse Romande forum meets at CERN

CERN Multimedia

2005-01-01

The subject of the «Forum des 100» meeting held at CERN on 9 June was «Suisse Romande: Une région en quête de succès» (a region in search of success). Organised by the magazine l'Hebdo and the Rezonance.ch association, the forum was attended by numerous representatives from politics, industry and education and consisted of a day of lectures and debates. Pascal Couchepin, Head of the Swiss Federal Department of Home Affairs, and Luc Ferry, philosopher and former French Education Minister, were among those who took part in the forum.

Pandemic influenza communication: views from a deliberative forum.

Science.gov (United States)

Rogers, Wendy A; Street, Jackie M; Braunack-Mayer, Annette J; Hiller, Janet E

2009-09-01

To use a deliberative forum to elicit community perspectives on communication about pandemic influenza planning, and to compare these findings with the current Australian national communication strategy. Deliberative forum of 12 persons randomly selected from urban South Australia. Forum members were briefed by experts in infection control, virology, ethics and public policy before deliberating on four key questions: what, how and when should the community be told about pandemic influenza and by whom? The forum recommended provision of detailed and comprehensive information by credible experts, rather than politicians, using a variety of media including television and internet. Recommendations included cumulative communication to build expertise in the community, and specific strategies to include groups such as young people, people with physical or mental disabilities, and rural and remote communities. Information provided should be practical, accurate, and timely, with no 'holding back' about the seriousness of a pandemic. The forum expressed confidence in the expert witnesses, despite the acknowledged uncertainty of many of the predictions. The deliberative forum's recommendations were largely consistent with the Australian national pandemic influenza communication strategy and the relevant literature. However, the forum recommended: release of more detailed information than currently proposed in the national strategy; use of non-political spokespersons; and use of novel communication methods. Their acceptance of uncertainty suggests that policy makers should be open about the limits of knowledge in potentially threatening situations. Our findings show that deliberative forums can provide community perspectives on topics such as communication about pandemic influenza.

Fagligt Forum ved en skillevej

DEFF Research Database (Denmark)

Bjerg, Claus

2008-01-01

Med cvu-bibliotekernes overgang til professionshøjskoler ændres det biblioteksfaglige landskab. Det har Fagligt Forum taget konsekvensen af og nedlægger sig selv i løbet af 2000......Med cvu-bibliotekernes overgang til professionshøjskoler ændres det biblioteksfaglige landskab. Det har Fagligt Forum taget konsekvensen af og nedlægger sig selv i løbet af 2000...

Proceedings of CanWEA's 2006 small wind conference

International Nuclear Information System (INIS)

2006-01-01

Small wind energy systems are typically comprised of a single wind turbine for on-site power generation of between 300 watts to 100 kW. They are suited for use in remote locations, as well as on farms or for on-grid residential applications. Small wind customers are concerned about environmental issues as well as the reliability of the electric power grid. Recent increases in electricity prices have contributed to a renewed interest in small wind systems. Primary distributed wind market growth areas include residential grid-connected sites; schools, public facilities and farmer co-operatives; and farms, business and industry. Growth in small wind applications has not been matched by an increase in government incentives, and the lack of clear technical standards for wind systems may negatively impact public perceptions of the industry. This conference provided an overview of the small wind industry in Canada. The conference provided a forum for wind industry members, government agencies, and academics to explore challenges and barriers to the growth of the small wind industry. The conference, which was held as part of the larger annual CanWEA 2006 conference and trade show, was divided into 3 sessions: (1) policies to support small wind; (2) doing business with small wind; and (3) small wind technical insights. Recommendations for the certification of small wind turbines were provided, as well as a model zoning by-law. Technical issues included the development of high penetration wind/diesel systems for isolated communities in the Arctic; technical challenges with small turbines; and siting guidelines for consumers. Several small wind turbine owners reviewed some of the challenges of both buying and using wind systems. Technical and market barriers for distributed wind applications were also discussed. The conference featured 13 presentations, of which 12 were catalogued separately for inclusion in this database. refs., tabs., figs

ITU World Youth Forum visits CERN

CERN Multimedia

2009-01-01

About 250 students selected by the International Telecommunication Union (ITU) to participate in the 2009 Youth Forum made CERN a primary destination for this year’s World Youth Forum event. The 250 students participating in the 2009 Youth Forum attend a presentation in the Globe of Science and Innovation.On Tuesday 6 October, the group visited several sites including the Microcosm exhibition and the ATLAS cavern to get a glimpse of what CERN does and the exciting science that is studied here. Since 2001 and every three years, the ITU World Forum brings together young men and women, aged 18-23, to learn about new technologies and the world around them. This year’s group included participants from one hundred and twenty-five different countries. This was the first time that the event involved a visit to CERN. When asked why CERN was a destination, Pascal Biner, organizer of the visit for ITU, explained that CERN was a necessary stop given the Forum’s base in Gen...

Can anonymous posters on medical forums be reidentified?

Science.gov (United States)

Bobicev, Victoria; Sokolova, Marina; El Emam, Khaled; Jafer, Yasser; Dewar, Brian; Jonker, Elizabeth; Matwin, Stan

2013-10-03

Participants in medical forums often reveal personal health information about themselves in their online postings. To feel comfortable revealing sensitive personal health information, some participants may hide their identity by posting anonymously. They can do this by using fake identities, nicknames, or pseudonyms that cannot readily be traced back to them. However, individual writing styles have unique features and it may be possible to determine the true identity of an anonymous user through author attribution analysis. Although there has been previous work on the authorship attribution problem, there has been a dearth of research on automated authorship attribution on medical forums. The focus of the paper is to demonstrate that character-based author attribution works better than word-based methods in medical forums. The goal was to build a system that accurately attributes authorship of messages posted on medical forums. The Authorship Attributor system uses text analysis techniques to crawl medical forums and automatically correlate messages written by the same authors. Authorship Attributor processes unstructured texts regardless of the document type, context, and content. The messages were labeled by nicknames of the forum participants. We evaluated the system's performance through its accuracy on 6000 messages gathered from 2 medical forums on an in vitro fertilization (IVF) support website. Given 2 lists of candidate authors (30 and 50 candidates, respectively), we obtained an F score accuracy in detecting authors of 75% to 80% on messages containing 100 to 150 words on average, and 97.9% on longer messages containing at least 300 words. Authorship can be successfully detected in short free-form messages posted on medical forums. This raises a concern about the meaningfulness of anonymous posting on such medical forums. Authorship attribution tools can be used to warn consumers wishing to post anonymously about the likelihood of their identity being

LLW Forum meeting report, May 7--9, 1997

International Nuclear Information System (INIS)

Norris, C.; Brown, H.; Lovinger, T.; Scheele, L.; Shaker, M.A.

1997-05-01

The Low-Level Radioactive Waste Forum met in Chicago, Illinois, on may 7--9, 1997. Twenty-three Forum Participants, Alternate Forum Participants, and meeting designees representing 20 compacts and states participated. A report on the meeting is given under the following subtitles: New developments in states and compacts; Upgrading an existing disposal facility; Revisions to DOE Order 5820 re DOE waste management; Conference of radiation control program directors: Recent and upcoming activities; National Conference of State Legislatures' (NCSL) low-level radioactive waste working group: Recent and upcoming activities; Executive session; LLW forum business session; Public involvement and risk communication: Success at West Valley, New York; DOE low-level waste management program; impact of the International Atomic Energy Agency's convention on waste; Panel discussion: The environmental justice concept--Past, present and future; New technologies for processing and disposal of LLRW; High-level and low-level radioactive waste: A dialogue on parallels and intersections; Draft agreement re uniform application of manifesting procedures; Regulatory issues focus; LLW forum October 1997 agenda planning; Resolutions; LLW forum regulatory issues discussion group meets; and Attendance

Forum Theater’s potential as a Research Tool

Directory of Open Access Journals (Sweden)

Andrea Calsamiglia Madurga

2016-03-01

Full Text Available We present a theoretical and epistemological reflection on Forum Theater’s potential as a Research Tool. Our presence on social action and research has led us to a double reflection on qualitative research’s limitations on the affect studies and the Forum Theater’s potential as a research tool to tackle research about affects. After some specific experiences in action research (qualitative research on romantic love and gender violence, and the creation process of the Forum Theater “Is it a joke?”, we explore Forum Theatre’s possibilities as a research tool in the feminist epistemology framework.

Online self-help forums on cannabis: A content assessment.

Science.gov (United States)

Greiner, Christian; Chatton, Anne; Khazaal, Yasser

2017-10-01

To investigate online self-help forums related to cannabis users who were searching for help on the Internet. We analyzed the content of 717 postings by 328 users in three online forums in terms of fields of interest and self-help mechanisms. Only English-language forums that were free of charge and without registration were investigated. The main self-help mechanisms were disclosure and symptoms, with relatively few posts concerning legal issues and social perceptions. The forums differed significantly in all fields of interest and self-help mechanisms except for social network and financial and vocational issues. Highly involved users more commonly posted on topics related to diagnosis, etiology/research, and provision of information and less commonly on those related to gratitude. Correlation analysis showed a moderate negative correlation between emotional support and illness-related aspects and between emotional support and exchange of information. Cannabis forums share similarities with other mental health forums. Posts differ according to user involvement and the specific orientation of the forum. The Internet offers a viable source of self-help and social support for cannabis users, which has potential clinical implications in terms of referring clients to specific forums. Copyright © 2017 Elsevier B.V. All rights reserved.

Power Electronics Converters for Wind Turbine Systems

DEFF Research Database (Denmark)

Blaabjerg, Frede; Liserre, Marco; Ma, Ke

2012-01-01

The steady growth of installed wind power together with the upscaling of the single wind turbine power capability has pushed the research and development of power converters toward full-scale power conversion, lowered cost pr kW, increased power density, and also the need for higher reliability. ...

Wind generator with electronic variable-speed drives

Energy Technology Data Exchange (ETDEWEB)

David, A.; Buchheit, N.; Jakobsen, H.

1996-12-31

Variable speed drives have been inserted between the network and the generator on certain recent wind power facilities. They have the following advantages: the drive allows the wind generator to operate at low speed with a significant reduction in acoustic noise, an important point if the facilities are sited near populated areas; the drive optimizes energy transfer, providing a gain of 4 to 10 %; the drive can possibly replace certain mechanical parts (the starting system and it in some cases, the reduction gear); the drive not only provides better transient management in relation to the network for less mechanical stress on the wind generator, it is also able to control reactive power. One commercial drive design sold by several manufacturers has already been installed on several wind generators with outputs of between 150 and 600 kw. In addition, such a solution is extremely well suited to mixed renewable energy systems. This design uses two inverse rectifier type converters and can therefore exchange energy in both directions. The equivalent drive with a single IGBT converter on the motor side and a diode converter on the network side is the solution most widely adopted throughout industry (with more than 50, 000 units installed in France per year). It still remains to be seen whether such a solution could be profitable in wind generator application (since the cost of the drive is quite high). This technical analysis is more destined for the converter-machine assembly specialists and is presented in this document, paying particular attention as it does to the modelling of the `wind energy - generator - drive - network` assembly, the associated drive command and control strategies and the simulations obtained during various transients. A 7.5 kW test bed has been installed in the Laboratoire d`Electronique de Puissance de Clamart, enabling tests to be carried out which emulate the operation of a wind generator.

Members of the Forum Engelberg visit CERN

CERN Multimedia

Patrive Loïez

2002-01-01

The Forum Engelberg is an annual interdisciplinary conference held in Engelberg, Switzerland intended to act as an international platform for debate and exchange of views on key issues affecting scientific research, technology, economics and philosophy. Its President is Hubert Curien - former French Minister of Research and Space Research, and President of the CERN Council from 1994 to 1996. Photo 01: CERN Director-General Prof. Luciano Maiani (left) speaks to Forum members and public figures from the Geneva area during the visit. In the background is Jean-Claude Landry from the Department of the Interior, Agriculture and Environment, State of Geneva. Photo 02: CERN Director-General Prof. Luciano Maiani (left) speaks to Forum members and public figures from the Geneva area during the visit. In the background is Bernard Ecoffey, Founder of the Forum Engelberg.

17. telekomunikacioni forum TELFOR 2009

Directory of Open Access Journals (Sweden)

Nebojša N. Gaćeša

2010-04-01

Full Text Available U Beogradu je 24, 25. i 26. novembra 2009. godine, u Sava centru, održan 17. telekomunikacioni forum TELFOR 2009, u organizaciji Društva za telekomunikacije – Beograd, „Telekom Srbija“ a. d., JP PTT saobraćaja „Srbija“, Elektrotehničkog fakulteta Univerziteta u Beogradu i IEEE Serbia & Montenegro ComSoc Chapter and Section. Telekomunikacioni forum TELFOR organizuje se sedamnaesti put kao domaći i regionalni godišnji skup stručnjaka koji rade u oblastima telekomunikacija i informacionih tehnologija. Učesnici su uglavnom telekomunikacioni inženjeri, ali i ekonomisti, pravnici, menadžeri, operatori i drugi. Na taj način TELFOR predstavlja forum u okviru kojeg se razmatraju sva relevantna pitanja telekomunikacija: tehnička, razvojna, regulatorna i ekonomska, pitanja proizvodnje opreme, usluga, servisa i funkcionisanja sistema.

Impact of neutrino flavor oscillations on the neutrino-driven wind nucleosynthesis of an electron-capture supernova

NARCIS (Netherlands)

Pllumbi, E.; Tamborra, I.; Wanajo, S.; Janka, H.-T.; Hüdepohl, L.

2015-01-01

Neutrino oscillations, especially to light sterile states, can affect nucleosynthesis yields because of their possible feedback effect on the electron fraction (Ye). For the first time, we perform nucleosynthesis calculations for neutrino-driven wind trajectories from the neutrino-cooling phase of

Proceedings of the Fifth Triennial Software Quality Forum 2000, Software for the Next Millennium, Software Quality Forum

Energy Technology Data Exchange (ETDEWEB)

Scientific Software Engineering Group, CIC-12

2000-04-01

The Software Quality Forum is a triennial conference held by the Software Quality Assurance Subcommittee for the Department of Energy's Quality Managers. The forum centers on key issues, information, and technology important in software development for the Nuclear Weapons Complex. This year it will be opened up to include local information technology companies and software vendors presenting their solutions, ideas, and lessons learned. The Software Quality Forum 2000 will take on a more hands-on, instructional tone than those previously held. There will be an emphasis on providing information, tools, and resources to assist developers in their goal of producing next generation software.

Power electronics converters for wind turbine systems

DEFF Research Database (Denmark)

Blaabjerg, Frede; Liserre, Marco; Ma, Ke

2011-01-01

The steady growth of installed wind power which reached 200 GW capacity in 2010, together with the up-scaling of the single wind turbine power capability - 7 MW’s has been announced by manufacturers - has pushed the research and development of power converters towards full scale power conversion,...

Electronic Journals, the Internet, and Scholarly Communication.

Science.gov (United States)

Kling, Rob; Callahan, Ewa

2003-01-01

Examines the role of the Internet in supporting scholarly communication via electronic journals. Topics include scholarly electronic communication; a typology of electronic journals; models of electronic documents and scholarly communication forums; publication speed; costs; pricing; access and searching; citations; interactivity; archiving and…

First International Workshop on Grid Simulator Testing of Wind Turbine Drivetrains: Workshop Proceedings

Energy Technology Data Exchange (ETDEWEB)

Gevorgian, V.; Link, H.; McDade, M.; Mander, A.; Fox, J. C.; Rigas, N.

2013-11-01

This report summarizes the proceedings of the First International Workshop on Grid Simulator Testing of Wind Turbine Drivetrains, held from June 13 to 14, 2013, at the National Renewable Energy Laboratory's National Wind Technology Center, located south of Boulder, Colorado. The workshop was sponsored by the U.S. Department of Energy and cohosted by the National Renewable Energy Laboratory and Clemson University under ongoing collaboration via a cooperative research and development agreement. The purpose of the workshop was to provide a forum to discuss the research, testing needs, and state-of-the-art apparatuses involved in grid compliance testing of utility-scale wind turbine generators. This includes both dynamometer testing of wind turbine drivetrains ('ground testing') and field testing grid-connected wind turbines. Four sessions followed by discussions in which all attendees of the workshop were encouraged to participate comprised the workshop.

The « 3-D donut » electrostatic analyzer for millisecond timescale electron measurements in the solar wind

Science.gov (United States)

Berthomier, M.; Techer, J. D.

2017-12-01

Understanding electron acceleration mechanisms in planetary magnetospheres or energy dissipation at electron scale in the solar wind requires fast measurement of electron distribution functions on a millisecond time scale. Still, since the beginning of space age, the instantaneous field of view of plasma spectrometers is limited to a few degrees around their viewing plane. In Earth's magnetosphere, the NASA MMS spacecraft use 8 state-of-the-art sensor heads to reach a time resolution of 30 milliseconds. This costly strategy in terms of mass and power consumption can hardly be extended to the next generation of constellation missions that would use a large number of small-satellites. In the solar wind, using the same sensor heads, the ESA THOR mission is expected to reach the 5ms timescale in the thermal energy range, up to 100eV. We present the « 3-D donut » electrostatic analyzer concept that can change the game for future space missions because of its instantaneous hemispheric field of view. A set of 2 sensors is sufficient to cover all directions over a wide range of energy, e.g. up to 1-2keV in the solar wind, which covers both thermal and supra-thermal particles. In addition, its high sensitivity compared to state of the art instruments opens the possibility of millisecond time scale measurements in space plasmas. With CNES support, we developed a high fidelity prototype (a quarter of the full « 3-D donut » analyzer) that includes all electronic sub-systems. The prototype weights less than a kilogram. The key building block of the instrument is an imaging detector that uses EASIC, a low-power front-end electronics that will fly on the ESA Solar Orbiter and on the NASA Parker Solar Probe missions.

Optimal Allocation of Power-Electronic Interfaced Wind Turbines Using a Genetic Algorithm - Monte Carlo Hybrid Optimization Method

DEFF Research Database (Denmark)

Chen, Peiyuan; Siano, Pierluigi; Chen, Zhe

2010-01-01

determined by the wind resource and geographic conditions, the location of wind turbines in a power system network may significantly affect the distribution of power flow, power losses, etc. Furthermore, modern WTs with power-electronic interface have the capability of controlling reactive power output...... limit requirements. The method combines the Genetic Algorithm (GA), gradient-based constrained nonlinear optimization algorithm and sequential Monte Carlo simulation (MCS). The GA searches for the optimal locations and capacities of WTs. The gradient-based optimization finds the optimal power factor...... setting of WTs. The sequential MCS takes into account the stochastic behaviour of wind power generation and load. The proposed hybrid optimization method is demonstrated on an 11 kV 69-bus distribution system....

CERN Apps meet in a forum

CERN Multimedia

Antonella Del Rosso

2013-01-01

In the fast-evolving world of mobile apps, creativity and usability are key words. For the time being, the number of CERN apps is quite limited but the situation could quickly change. An information-sharing forum set up by the IT Department is a starting point to channel your creativity with the help of experts, best practices and useful guidelines.   The CAPPS (CERN Apps) Forum was set up about a year ago. Its members come from various departments and meet every two or three months to update each other on the apps that are in preparation, share the latest news on the available software, discuss best practices and so on. “The Forum is open to anybody wanting to develop apps at CERN,” explains David Foster, Deputy Department Head and initiator of the CAPPS Forum. “Developers, communication experts and IT infrastructure experts meet and discuss various topics, from branding-related issues to coding and implementation solutions. The aim is to go forward in a coherent way...

Can Online Forums Be Designed to Empower Local Communities?

Directory of Open Access Journals (Sweden)

Kerill Dunne

2011-07-01

Full Text Available There has been a growing concern regarding political disengagement among citizens within western representative democracies. This concern has brought about calls for local communities to be empowered by giving citizens more control over local decision making. The objective of this paper is to examine if local political online forums can be built to empower local communities. That is to say, this paper will test if the E-Democracy.org’s Local Issues Forum Guidebook recommendations (A to do list for building successful online forums actually work and produce forums which facilitate citizens to have a greater say on local decision making and thus, induce empowerment. In order to test these recommendations a two-pronged methodological approach was taken. Firstly, using these recommendations an online forum was constructed in-conjunction with a local authority within the UK. Secondly, the recommendations were tested again except in this second approach a sample of online forums from around the world was examined. This paper argues that the E-Democracy.org’s recommendations do not always produce forums which empower local communities - Based on lessons learned from both experiments new guidelines are provided.

Use of social media to circumvent sales and advertising ban of electronic cigarettes

Directory of Open Access Journals (Sweden)

Murat Güner

2018-03-01

Full Text Available Background There are no legal electronic cigarette products available in Turkey. According to the law whether including tobacco or not products that resemble tobacco products can not be advertised, promoted and sold through internet.However the use of electronic cigarettes are frequently observed. This study was carried out in order to find out the sales outlet and advertising media of the publicly available products. Methods Internet search of the key words "e-cigarettes and electronic cigarettes" in Turkish language was carried out . The survey of the forum and websites identified were further analyzed to detect the presence of advertising, promotion and trading elements. Results There were 94 websites and one social forum with 69,354 members on electronic cigarettes in Turkish language. Of the websites 95 % had advertising and facilitated online sales. Social media forum had a section for beginners which was accessible by non-member, containing information about the device, liquids and usage. Under the heading" starter kit for beginners" 143 brands were promoted. The suppliers were introduced under 74 headings and 44774 messages. 25 suppliers sold e-cigarettes through the forum by 221 various advertising. Online shopping section was consisted of 1990 topics and 179.100 messages. The forum also facilitated exchange of products between members, as well as international sales without customs. All the websites had Turkish domain names and used regular shipping companies for the delivery of the products. The social media forum had an international hosting. Advertising contained false claims about the safety of the products referring to reputable international organizations.Social media forum provided home-made recipes and the names and adresses of chemical supplier companies. Conclusions Social media was extensively used for the sale and advertising of electronic cigarettes that were not licenced in Turkey. Laws need to be enforced not only in

Performance tests of a power-electronics converter for multi-megawatt wind turbines using a grid emulator

International Nuclear Information System (INIS)

Averous, Nurhan Rizqy; Berthold, Anica; Monti, Antonello; De Doncker, Rik W.; Schneider, Alexander; Schwimmbeck, Franz

2016-01-01

A vast increase of wind turbines (WT) contribution in the modern electrical grids have led to the development of grid connection requirements. In contrast to the conventional test method, testing power-electronics converters for WT using a grid emulator at Center for Wind Power Drives (CWD) RWTH Aachen University offers more flexibility for conducting test scenarios. Further analysis on the performance of the device under test (DUT) is however required when testing with grid emulator since the characteristic of the grid emulator might influence the performance of the DUT. This paper focuses on the performance analysis of the DUT when tested using grid emulator. Beside the issue regarding the current harmonics, the performance during Fault Ride-Through (FRT) is discussed in detail. A power hardware in the loop setup is an attractive solution to conduct a comprehensive study on the interaction between the power-electronics converters and the electrical grids. (paper)

Performance tests of a power-electronics converter for multi-megawatt wind turbines using a grid emulator

Science.gov (United States)

Rizqy Averous, Nurhan; Berthold, Anica; Schneider, Alexander; Schwimmbeck, Franz; Monti, Antonello; De Doncker, Rik W.

2016-09-01

A vast increase of wind turbines (WT) contribution in the modern electrical grids have led to the development of grid connection requirements. In contrast to the conventional test method, testing power-electronics converters for WT using a grid emulator at Center for Wind Power Drives (CWD) RWTH Aachen University offers more flexibility for conducting test scenarios. Further analysis on the performance of the device under test (DUT) is however required when testing with grid emulator since the characteristic of the grid emulator might influence the performance of the DUT. This paper focuses on the performance analysis of the DUT when tested using grid emulator. Beside the issue regarding the current harmonics, the performance during Fault Ride-Through (FRT) is discussed in detail. A power hardware in the loop setup is an attractive solution to conduct a comprehensive study on the interaction between the power-electronics converters and the electrical grids.

Low-Level Waste (LLW) forum meeting report

International Nuclear Information System (INIS)

1995-01-01

The Low-Level Radioactive Waste Forum (LLW Forum) is an association of state and compact representatives, appointed by governors and compact commissions, established to facilitate state and compact implementation of the Low-Level Radioactive Waste Policy Act of 1980 and the Low-Level Radioactive Waste Policy Amendments Act of 1985 and to promote the objectives of low-level radioactive waste regional compacts. The LLW Forum provides an opportunity for state and compact officials to share information with one another and to exchange views with officials of federal agencies and other interested parties

Forum for Almen Medicinske ph.d.-studerende

DEFF Research Database (Denmark)

Vedsted, Peter; Waldorff, Frans Boch; Eriksson, Tina

Rapport fra første fællesmøde mellem nuværende og kommende almenmedicinske ph.d.-studerende. Rapporten anbefaler dannelse af et egentligt almenmedicinsk ph.d.-forum, der søges optaget i DSAM som en interessegruppe. Ph.d.-forum betragter sig som en ressource ved forskellige initiativer og ønsker...... blandt andet at arbejde for en værdig ansættelse af yngre forskere. Blandt de konkrete forslag, Ph.d.-forum har stillet, er almenmedicinske ph.d.-kurser og ph.d.-stipendium med henblik på udarbejdelse af protokol....

The South African Forum for Radiation Protection

International Nuclear Information System (INIS)

Basson, J.K.; Le Roux, P.R.

1993-01-01

The use of ionising radiation in South Africa since the turn of the century was initially limited to x-rays and radium, with predominant applications in medicine for diagnosis and therapy. Since 1948 artificial radio-isotopes have been increasingly available and such applications have been widely extended to industry, agriculture and science. Initially, the Council for Scientific and Industrial Research developed radiation protection in South Africa. It was later recommended that an independent forum, the South African Forum for Radiation Protection, be established. The activities of the Forum are described

Low-Level Waste (LLW) forum meeting report

Energy Technology Data Exchange (ETDEWEB)

NONE

1995-12-31

The Low-Level Radioactive Waste Forum (LLW Forum) is an association of state and compact representatives, appointed by governors and compact commissions, established to facilitate state and compact implementation of the Low-Level Radioactive Waste Policy Act of 1980 and the Low-Level Radioactive Waste Policy Amendments Act of 1985 and to promote the objectives of low-level radioactive waste regional compacts. The LLW Forum provides an opportunity for state and compact officials to share information with one another and to exchange views with officials of federal agencies and other interested parties.

Members of the Forum Engelberg visit CERN

CERN Multimedia

Patrice Loïez

2002-01-01

The Forum Engelberg is an annual interdisciplinary conference held in Engelberg, Switzerland intended to act as an international platform for debate and exchange of views on key issues affecting scientific research, technology, economics and philosophy. Its President is Hubert Curien - former French Minister of Research and Space Research, and President of the CERN Council from 1994 to 1996. Photo 01: Thérèse Wolf, Secretary of Forum Engelberg; Alain Hervé; Horst Wenninger; and Alexander Höchli, Forum member and former Landammann of the canton of Obwalden, at the CMS detector's assembly site.

Electronically commutated serial-parallel switching for motor windings

Science.gov (United States)

Hsu, John S [Oak Ridge, TN

2012-03-27

A method and a circuit for controlling an ac machine comprises controlling a full bridge network of commutation switches which are connected between a multiphase voltage source and the phase windings to switch the phase windings between a parallel connection and a series connection while providing commutation discharge paths for electrical current resulting from inductance in the phase windings. This provides extra torque for starting a vehicle from lower battery current.

HC Forum®: a web site based on an international human cytogenetic database

Science.gov (United States)

Cohen, Olivier; Mermet, Marie-Ange; Demongeot, Jacques

2001-01-01

Familial structural rearrangements of chromosomes represent a factor of malformation risk that could vary over a large range, making genetic counseling difficult. However, they also represent a powerful tool for increasing knowledge of the genome, particularly by studying breakpoints and viable imbalances of the genome. We have developed a collaborative database that now includes data on more than 4100 families, from which we have developed a web site called HC Forum® (http://HCForum.imag.fr). It offers geneticists assistance in diagnosis and in genetic counseling by assessing the malformation risk with statistical models. For researchers, interactive interfaces exhibit the distribution of chromosomal breakpoints and of the genome regions observed at birth in trisomy or in monosomy. Dedicated tools including an interactive pedigree allow electronic submission of data, which will be anonymously shown in a forum for discussions. After validation, data are definitively registered in the database with the email of the sender, allowing direct location of biological material. Thus HC Forum® constitutes a link between diagnosis laboratories and genome research centers, and after 1 year, more than 700 users from about 40 different countries already exist. PMID:11125121

LLW Forum meeting report, October 20--22, 1997

International Nuclear Information System (INIS)

Norris, C.; Brown, H.; Lovinger, T.; Scheele, L.; Shaker, M.A.

1997-10-01

The Low-Level Radioactive Waste Forum met in Annapolis, Maryland, on October 20--22, 1997. Twenty-six Forum Participants, Alternate Forum Participants, and meeting designees representing 22 compacts and states participated. A report on the meeting is given under the following subtitles: New developments in states and compacts; Discussion with NRC Commissioner McGaffigan; Regulatory issues session; Executive session; LLW forum business session; DOE low-level waste management program; Transportation of radioactive waste; Environmental equity: Title VI; Congressional studies on Ward Valley Site; Implementation of DOE's strategy for waste management; Relicensing Envirocare; Draft agreement for uniform application of manifesting procedures; CRCPD report; Panel: Future of low-level radioactive waste management; Agenda planning: February 1998; Resolutions; and Attendance

GreyGuide Forum and Repository

OpenAIRE

Biagioni, Stefania; Farace, Dominic

2014-01-01

We present the GreyGuide: an online forum and repository of good practice in the field of grey literature. The launch of the GreyGuide Repository took place in December 2013 at the Fifteenth International Conference on Grey Literature. Since then, the acquisition of both proposed and published good practices are underway. The GreyGuide as an online forum is currently in a developmental stage and is influenced by the changes that have taken place in GreyNet's new infrastructure commencing in J...

The Copenhagen Forum 1996-2016

DEFF Research Database (Denmark)

Ry Nielsen, Jens Carl; Raine, John

2016-01-01

Purpose: This chapter tells the story of the initiation, development (over two decades) and collective contribution of the Copenhagen Forum since its foundation in 1996. This Forum comprises a grouping of teachers and directors of masters-level public administrative programmes (notably the MPA) f...... the inspiration for this volume, and the individual contributions, derive. It is a context that has been all about a shared fascination with, and collective commitment to, the advancement of learning and development among practicing public managers....

The Accelerator Reliability Forum

CERN Document Server

Lüdeke, Andreas; Giachino, R

2014-01-01

A high reliability is a very important goal for most particle accelerators. The biennial Accelerator Reliability Workshop covers topics related to the design and operation of particle accelerators with a high reliability. In order to optimize the over-all reliability of an accelerator one needs to gather information on the reliability of many different subsystems. While a biennial workshop can serve as a platform for the exchange of such information, the authors aimed to provide a further channel to allow for a more timely communication: the Particle Accelerator Reliability Forum [1]. This contribution will describe the forum and advertise it’s usage in the community.

Suprathermal electron loss cone distributions in the solar wind: Ulysses observations

International Nuclear Information System (INIS)

Phillips, J. L.; Feldman, W. C.; Gosling, J. T.; Hammond, C. M.; Forsyth, R. J.

1996-01-01

We present observations by the Ulysses solar wind plasma experiment of a new class of suprathermal electron signatures. At low solar latitudes and heliocentric distances beyond 3.37 AU Ulysses encountered seven intervals, ranging in duration from 1 hour to 22 hours, in which the suprathermal distributions included an antisunward field-aligned beam and a return population with a flux dropout typically spanning ±60 deg. from the sunward field-aligned direction. All events occurred between the forward and reverse shocks or waves bounding corotating interaction regions (CIRs). The observations support a scenario in which the sunward-moving electrons result from reflection of the prevailing antisunward field-aligned beam at magnetic field compressions downstream from the spacecraft, with wide loss cones caused by the relatively weak mirror ratio. This hypothesis requires that the field magnitude within the CIRs actually increased locally with increasing field-aligned distance from the Sun

2nd Developers@CERN Forum

CERN Multimedia

CERN. Geneva

2016-01-01

Are you a Python guru or would you like to learn?   The Developers@CERN Forum is an event by developers, for developers, aimed at promoting knowledge and experience sharing. This edition will take place at the IT Amphitheatre, on the 30th and 31st of May afternoons. It will consist of a series of short presentations and workshops. The topic for this conference will be Python at CERN: language, frameworks and tools. Have you got an idea for a presentation or workshop? Then, tell us about it (deadline on 9th of May). Registration will open in early May. Please subscribe to developers-forum-announce@cern.ch mailing list for further information. This event will be made by developers for developers. We are counting on your presence, but also on your contributions! To learn more about the initiative, read the CERN Bulletin article. Organization You can get in touch us at developers-forum-organizers@cern.ch.

3rd Developers@CERN Forum

CERN Multimedia

CERN. Geneva

2017-01-01

It's about U and I !   The Developers@CERN Forum is an event by developers, for developers, aimed at promoting knowledge and experience sharing. This edition will take place at the IT Amphitheatre, on the 13th, 14th and 15th of February afternoons. It will consist of a series of short presentations and workshops. The topic for this conference will be Frontend & User interfaces. Have you got an idea for a presentation or workshop? Then, tell us about it (deadline on 27th of January). Registration will open in November. Please subscribe to developers-forum-announce@cern.ch mailing list for further information. This event will be made by developers for developers. We are counting on your presence, but also on your contributions! To learn more about the initiative, read the CERN Bulletin article. Organization You can get in touch us at developers-forum-organizers@cern.ch.

Insight conference reports : proceedings of the 5. annual Ontario power forum

International Nuclear Information System (INIS)

2006-01-01

This conference provided a forum for members of the electricity industry and other stakeholders to discuss current trends and issues related to electricity generation in Ontario. Presentations given at the conference examined challenges in supply and demand as well as recent changes in local distribution companies. Issues related to the use of nuclear energy were discussed, and new business models using nuclear energy as a primary source of energy were reviewed. Members at the conference also discussed issues related to coal-fired generating plants and new advances in clean coal technology. Electricity prices were also discussed and issues related to wind power integration and electricity generation were reviewed. One of the 20 presentations featured at this conference has been catalogued separately for inclusion in this database. refs., tabs., figs

The Electron Temperature and Anisotropy in the Solar Wind. Comparison of the Core and Halo Populations

Czech Academy of Sciences Publication Activity Database

Pierrard, V.; Lazar, M.; Poedts, S.; Štverák, Štěpán; Maksimovic, M.; Trávníček, Pavel M.

2016-01-01

Roč. 291, č. 7 (2016), s. 2165-2179 ISSN 0038-0938 R&D Projects: GA ČR GA15-17490S Institutional support: RVO:67985815 Keywords : solar wind * electron velocity distributions * temperature anisotropy Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics Impact factor: 2.682, year: 2016

Forum Commentary

Science.gov (United States)

Kanno, Yasuko

2014-01-01

Social class has been underresearched in the field of applied linguistics. The central goal of this forum was to stimulate more conversation about social class as it impacts language learning and teaching. In this article, I comment on 3 salient themes that have emerged in the 5 articles: (1) agency and structure in language learning and teaching,…

Wind energy analysis system

OpenAIRE

2014-01-01

M.Ing. (Electrical & Electronic Engineering) One of the most important steps to be taken before a site is to be selected for the extraction of wind energy is the analysis of the energy within the wind on that particular site. No wind energy analysis system exists for the measurement and analysis of wind power. This dissertation documents the design and development of a Wind Energy Analysis System (WEAS). Using a micro-controller based design in conjunction with sensors, WEAS measure, calcu...

Wind Penetration with different wind turbine technologies in a weak grid

International Nuclear Information System (INIS)

Santos Fuentefria, Ariel; Castro Fernandez, Miguel A.; Martínez García, Antonio

2012-01-01

The insertion of wind energy into electric network may provoke stability problems due to stochastic character of wind. The variation in the wind causes voltage variation in the Point of Common Coupling (PCC). In a weakest system that variation is high. Another important factor is wind turbine technology. The use of grid-connected fixed speed wind generator introduces a great consumption of reactive power that can be compensated using different devices as capacitors bank or static var compensator (SVC or STATCOM). In the other hand the variable speed wind turbine have an electronic converter to control the reactive consumption to maintain the PCC voltage more stable. In this paper a comparison between the different types of wind turbines technology is show. It's analyzing the impact in wind power limit for different wind turbine technologies in a weak system. (author)

Shaping the solar wind electron temperature anisotropy by the interplay of core and suprathermal populations

Science.gov (United States)

Shaaban Hamd, S. M.; Lazar, M.; Poedts, S.; Pierrard, V.; Štverák

2017-12-01

We present the results of an advanced parametrization of the temperature anisotropy of electrons in the slow solar wind and the electromagnetic instabilities resulting from the interplay of their thermal core and suprathermal halo populations. A large set of observational data (from the Ulysses, Helios and Cluster missions) is used to parametrize these components and establish their correlations. Comparative analysis demonstrates for the first time a particular implication of the suprathermal electrons which are less dense but hotter than thermal electrons. The instabilities are significantly stimulated by the interplay of the core and halo populations, leading to lower thresholds which shape the observed limits of the temperature anisotropy for both the core and halo populations. This double agreement strongly suggests that the selfgenerated instabilities play the major role in constraining the electron anisotropy.

78 FR 53790 - Public Forum-Safety Culture: Enhancing Transportation Safety

Science.gov (United States)

2013-08-30

... NATIONAL TRANSPORTATION SAFETY BOARD Public Forum--Safety Culture: Enhancing Transportation Safety On Tuesday and Wednesday, September 10-11, 2013, the National Transportation Safety Board (NTSB) will convene a forum titled, ``Safety Culture: Enhancing Transportation Safety.'' The forum will begin at 9:00...

Defining Data Access Pathways for Atmosphere to Electrons Wind Energy Data

Science.gov (United States)

Macduff, M.; Sivaraman, C.

2016-12-01

Atmosphere to Electrons (A2e), is a U.S. Department of Energy (DOE) Wind Program research initiative designed to optimize the performance of wind power plants by lowering the levelized cost of energy (LCOE). The Data Archive and Portal (DAP), managed by PNNL and hosted on Amazon Web Services, is a key capability of the A2e initiative. The DAP is used to collect, store, catalog, preserve and disseminate results from the experimental and computational studies representing a diverse user community requiring both open and proprietary data archival solutions(http://a2e.pnnl.gov). To enable consumer access to the data in DAP it is being built on a set of API's that are publically accessible. This includes persistent references for key meta-data objects as well as authenticated access to the data itself. The goal is to make the DAP catalog visible through a variety of data access paths bringing the data and metadata closer to the consumer. By providing persistent metadata records we hope to be able to build services that capture consumer utility and make referencing datasets easier.

Evaluating the impact of electrical grid connection on the wind turbine performance for Hofa wind farm scheme in Jordan

International Nuclear Information System (INIS)

Abderrazzaq, M.H.; Aloquili, O.

2008-01-01

The growth of wind energy is attributed to the development of turbine size and the increase in number of units in each wind farm. The current modern design of large wind turbines (WT) is directed towards producing efficient, sensitive and reliable units. To achieve this goal, modern turbines are equipped with several devices which are operated with highly advanced electronic circuits. Sensing instruments, measuring devices and control processes of major systems and subsystems are based on various types of electronic apparatus and boards. These boards are very sensitive to the voltage variations caused by abnormal conditions in both the turbine itself and the electric grid to which the wind farm is connected. This paper evaluates wind farm records and proposes a number of methods to overcome such obstacles associated with the design of large wind turbines. Several cases of grid abnormality such as sudden feeder interruption due to the short circuit, network disconnection, voltage variation and circuit breaker opening affecting wind turbines operation and availability are classified and presented. The weight of such impact is determined for each type of disturbances associated with electronic problems in the wind turbine. Wind turbine performance at Hofa wind farm scheme in Jordan is taken as a case study

The electron temperature and anisotropy in the solar wind. Comparison of the core and halo populations

Czech Academy of Sciences Publication Activity Database

Pierrard, V.; Lazar, M.; Poedts, S.; Štverák, Štěpán; Maksimovic, M.; Trávníček, Pavel M.

2016-01-01

Roč. 291, č. 7 (2016), s. 2165-2179 ISSN 0038-0938 Institutional support: RVO:68378289 Keywords : solar wind * electron velocity distributions * temperature anisotropy Subject RIV: BL - Plasma and Gas Discharge Physics Impact factor: 2.682, year: 2016 http://link.springer.com/article/10.1007/s11207-016-0961-7

The Environmental and Ecological Forum 1970-1971.

Science.gov (United States)

Atomic Energy Commission, Washington, DC. Office of Information Services.

This report contains the papers presented in the 1970-1971 Environmental and Ecological Forum series, planned to provide an overview of the significant environmental, social, and economic aspects of electric power generation, more specifically, the pros and cons of nuclear power production. The Forum was organized as a public service to foster…

Gyrokinetic Simulations of Solar Wind Turbulence from Ion to Electron Scales

International Nuclear Information System (INIS)

Howes, G. G.; TenBarge, J. M.; Dorland, W.; Numata, R.; Quataert, E.; Schekochihin, A. A.; Tatsuno, T.

2011-01-01

A three-dimensional, nonlinear gyrokinetic simulation of plasma turbulence resolving scales from the ion to electron gyroradius with a realistic mass ratio is presented, where all damping is provided by resolved physical mechanisms. The resulting energy spectra are quantitatively consistent with a magnetic power spectrum scaling of k -2.8 as observed in in situ spacecraft measurements of the 'dissipation range' of solar wind turbulence. Despite the strongly nonlinear nature of the turbulence, the linear kinetic Alfven wave mode quantitatively describes the polarization of the turbulent fluctuations. The collisional ion heating is measured at subion-Larmor radius scales, which provides evidence of the ion entropy cascade in an electromagnetic turbulence simulation.

78 FR 19024 - Lithium Ion Batteries in Transportation Public Forum

Science.gov (United States)

2013-03-28

... NATIONAL TRANSPORTATION SAFETY BOARD Lithium Ion Batteries in Transportation Public Forum On Thursday and Friday, April 11-12, 2013, the National Transportation Safety Board (NTSB) will convene a forum titled, ``Lithium Ion Batteries in Transportation.'' The forum will begin at 9:00 a.m. on both...

Users’ attention behaviors and features in internet forum

Directory of Open Access Journals (Sweden)

Yong-Zhong Sha

2015-11-01

Full Text Available Purpose: Attention resource is scarce. Organizing community activities in online forums faces the challenge of attracting users’ limited attention. Understanding how users of online forums allocate, maintain, and change their attentional focus and what features of online forms influence their attention behaviors is critical for effective information design. This paper seeks understanding of users’ attention behaviors and features when they participate in discussions in online forums. Design/methodology/approach: A conceptual model was established to explore the indicator system of attention’s measurement. The related attention data were collected from Alexa Access Statistics Tool and Katie community. Then this paper computed the correlation coefficient and regression relationship between the indicators of visual attention and cognitive attention. Thereafter this paper analyzed and discussed users’ attention behaviors and features in Internet forum. Findings: Relevant bivariate correlation analysis and regression analysis discovers that Internet forum's attention is mainly as visual attention in users’ early involvement. Attention resources can be transformed. In a deep participation, users’ cognitive attention is more significant. Meanwhile cognitive attention behaviors’ further development will lead to the phenomenon that cognitive attention input is prone to increase faster in the early duration. That means in-depth discussion and interaction are more likely to appear in the early stages of participation. Research limitations/implications: There are some limitations about this study. The indicators are not comprehensive enough because factors affecting the distribution of attention resources in Internet forums are complex. We didn’t distinguish different types of Internet forums when we collected the relevant data. Future research will focus more on how to obtain comprehensive attention data. Originality/value: T his paper

Control Mechanisms of the Electron Heat Flux in the Solar Wind: Observations in Comparison to Numerical Simulations

Science.gov (United States)

Stverak, S.; Hellinger, P.; Landi, S.; Travnicek, P. M.; Maksimovic, M.

2017-12-01

Recent understanding of the heat transport and dissipation in the expanding solar wind propose number of complex control mechanisms down to the electron kinetic scales. We investigate the evolution of electron heat flux properties and constraints along the expansion using in situ observations from Helios spacecraft in comparison to numerical kinetic simulations. In particular we focus on the roles of Coulomb collisions and wave-particle interactions in shaping the electron velocity distribution functions and thus controlling the heat transported by the electron heat flux. We show the general evolution of the electron heat flux to be driven namely by the Coulomb collisions. Locally we demonstrate the wave-particle interactions related to the kinetic plasma instabilities to be providing effective constraints in case of extreme heat flux levels.

Self-Governance on Trial: A Public Sphere Analysis of News Website Forum Comments

Directory of Open Access Journals (Sweden)

J. David Wolfgang

2016-04-01

Full Text Available The online public sphere offers society an opportunity to pursue self-governance through rational-critical discourse of public issues. However, testing the effectiveness of the sphere involves studying the structure of the online forum (e.g. whether the forum allows for pseudonymous comments or not and the quality of the content in the forum. This research studied online news forums on the topics of gun control and civil unions in Colorado to see what barriers to participating in the forum might exist in the structure of the forum and then what types of content was produced in the forum. The research showed that a forum allowing commenters to use a pseudonym led to comments with more exchange and critique of reasoned normative positions and use of supporting facts. However, neither the pseudonymous forum nor the identified forum had stronger levels of commitment to constructive dialogue in the forum. Also, commenters showed no reflexivity in their comments, meaning that participants were not assessing their own positions or changing their perspectives based on the arguments of others. While this shows that reducing barriers to accessing the forum helps to produce a public sphere environment, there is still work to be done in improving the level of constructive dialogue and stimulating negotiation and consensus building.

Wind Turbine Technologies

DEFF Research Database (Denmark)

Hansen, Anca Daniela

2017-01-01

, and with or without gearboxes, using the latest in power electronics, aerodynamics, and mechanical drive train designs [4]. The main differences between all wind turbine concepts developed over the years, concern their electrical design and control. Today, the wind turbines on the market mix and match a variety......, the design of wind turbines has changed from being convention driven to being optimized driven within the operating regime and market environment. Wind turbine designs have progressed from fixed speed, passive controlled and with drive trains with gearboxes, to become variable speed, active controlled......,6] and to implement modern control system strategies....

Electronic School.

Science.gov (United States)

Executive Educator, 1994

1994-01-01

This issue of "The Electronic School" features a special forum on computer networking. Articles specifically focus on network operating systems, cabling requirements, and network architecture. Tom Wall argues that virtual reality is not yet ready for classroom use. B.J. Novitsky profiles two high schools experimenting with CD-ROM…

4. heat pump forum. Politics, market, finances, marketing and sales. Proceedings 2006; 4. Forum Waermepumpe. Politik, Markt, Finanzierung, Marketing und Vertrieb. Tagungsband 2006

Energy Technology Data Exchange (ETDEWEB)

NONE

2006-07-01

The fourth heat pump forum is characterised by the latest state-of-the art. For the first time you will receive as forum documents not only the proceedings but also an updated agenda, supplemented by the latest business field information and an overview of distinctive achievements of the company Solarpraxis AG. Highly qualified representatives will be present at the plenary discussion on both forum days for the first time, too. This year the heat pump forum again consists of talks, impulse presentations, discussions and workshops dealing in many different ways and based on a proven concept with the topics politics, market, finances, marketing and sales. In terms of contents the forum covers all topics, which are of importance for a further growth of the heat pump field: political frame conditions as basis for a stable home market, heat pumps in old buildings, marketing strategies as well as quality assurance and practice. (orig.)

The Effects of Solar Wind Dynamic Pressure Changes on the Substorm Auroras and Energetic Electron Injections on 24 August 2005

Science.gov (United States)

Li, L. Y.; Wang, Z. Q.

2018-01-01

After the passage of an interplanetary (IP) shock at 06:13 UT on 24 August 2005, the enhancement (>6 nPa) of solar wind dynamic pressure and the southward turning of interplanetary magnetic field (IMF) cause the earthward movement of dayside magnetopause and the drift loss of energetic particles near geosynchronous orbit. The persistent electron drift loss makes the geosynchronous satellites cannot observe the substorm electron injection phenomenon during the two substorm expansion phases (06:57-07:39 UT) on that day. Behind the IP shock, the fluctuations ( 0.5-3 nPa) of solar wind dynamic pressure not only alter the dayside auroral brightness but also cause the entire auroral oval to swing in the day-night direction. However, there is no Pi2 pulsation in the nightside auroral oval during the substorm growth phase from 06:13 to 06:57 UT. During the subsequent two substorm expansion phases, the substorm expansion activities cause the nightside aurora oval brightening from substorm onset site to higher latitudes, and meanwhile, the enhancement (decline) of solar wind dynamic pressure makes the nightside auroral oval move toward the magnetic equator (the magnetic pole). These observations demonstrate that solar wind dynamic pressure changes and substorm expansion activities can jointly control the luminosity and location of the nightside auroral oval when the internal and external disturbances occur simultaneously. During the impact of a strong IP shock, the earthward movement of dayside magnetopause probably causes the disappearance of the substorm electron injections near geosynchronous orbit.

Reliability Assessment of Solder Joints in Power Electronic Modules by Crack Damage Model for Wind Turbine Applications

Directory of Open Access Journals (Sweden)

John D. Sørensen

2011-12-01

Full Text Available Wind turbine reliability is an important issue for wind energy cost minimization, especially by reduction of operation and maintenance costs for critical components and by increasing wind turbine availability. To develop an optimal operation and maintenance plan for critical components, it is necessary to understand the physics of their failure and be able to develop reliability prediction models. Such a model is proposed in this paper for an IGBT power electronic module. IGBTs are critical components in wind turbine converter systems. These are multilayered devices where layers are soldered to each other and they operate at a thermal-power cycling environment. Temperature loadings affect the reliability of soldered joints by developing cracks and fatigue processes that eventually result in failure. Based on Miner’s rule a linear damage model that incorporates a crack development and propagation processes is discussed. A statistical analysis is performed for appropriate model parameter selection. Based on the proposed model, a layout for component life prediction with crack movement is described in details.

Wind Power - A Power Source Enabled by Power Electronics

DEFF Research Database (Denmark)

Blaabjerg, Frede; Chen, Zhe

2004-01-01

. The deregulation of energy has lowered the investment in bigger power plants, which means the need for new electrical power sources may be very high in the near future. Two major technologies will play important roles to solve the future problems. One is to change the electrical power production sources from......The global electrical energy consumption is still rising and there is a steady demand to increase the power capacity. The production, distribution and the use of the energy should be as technological efficient as possible and incentives to save energy at the end-user should be set up...... the conventional, fossil (and short term) based energy sources to renewable energy sources. The other is to use high efficient power electronics in power systems, power production and end-user application. This paper discuss the most emerging renewable energy source, wind energy, which by means of power...

A Hybrid Approach for Thread Recommendation in MOOC Forums

OpenAIRE

Ahmad. A. Kardan; Amir Narimani; Foozhan Ataiefard

2017-01-01

Recommender Systems have been developed to provide contents and services compatible to users based on their behaviors and interests. Due to information overload in online discussion forums and users diverse interests, recommending relative topics and threads is considered to be helpful for improving the ease of forum usage. In order to lead learners to find relevant information in educational forums, recommendations are even more needed. We present a hybrid thread recommender system for MOOC ...

European Stirling forum 2000. Proceedings; Europaeisches Stirling Forum 2000. Tagungsband

Energy Technology Data Exchange (ETDEWEB)

NONE

2000-07-01

This document comprises all 42 papers presented at the 'European Stirling Forum 2000', held in Osnabrueck on February 22-24, 2000. Among others, the following subjects were discussed: Thermodynamics, new developments, Stirling engines, free piston heat pumps, flow optimisation of regenerators for Stirling engines, simulation for modelling of flow and heat transfer in the gas cycle of Stirling engines, design and performance, Stirling refrigerators, economic efficiency of biomass Stirling engines, power control of a Stirling CHP system, a Stirling refrigerator for ultralow temperatures in the refrigeration industry. [German] Das vorliegende Dokument enthaelt alle (42) Beitraege der Referenten des 'Europaeischen Stirling Forums 2000', das vom 22. bis 24. Februar 2000 in Osnabrueck stattgefunden hat. Einige der behandelten Themenschwerpunkte im Zusammenhang mit der Stirling-Maschine waren die Thermodynamik, neue Entwicklungen des Kreisprozesses, Heissgasmotoren, Freikolben-Waermepumpe, stroemungstechnische Optimierung von Regeneratoren fuer Stirling-Maschinen, Simulation zur Modellierung der Stroemung und Waermeuebertragung im Gaskreislauf von Stirling-Maschinen, Entwurf und Betriebsverhalten, Stirling-Kaeltemaschine, Wirtschaftlichkeit von Biomasse-Stirlingmotoren, Leistungsregelung eines Stirling-Blockheizkraftwerks, Anwendung eines Stirling-Kuehlers, zum Ultratiefkuehlen in der Kuehlindustrie. (AKF)

EUROSAFE forum 2016

Energy Technology Data Exchange (ETDEWEB)

NONE

2016-07-01

The proceedings of the Eurosafe forum 2016 includes contributions to the following issues: Seminar 1: nuclear installation safety - assessment; Seminar 2: Nuclear installation safety - research; Seminar 3: Waste management and decommissioning - dismantling; Seminar 4: radiation protection, environment and emergency preparedness; Seminar 5: security of nuclear installations and materials.

Wind Program Newsletter, May 2016 Edition

Energy Technology Data Exchange (ETDEWEB)

2016-05-01

The U.S. Department of Energy Wind Program Newsletter provides wind industry stakeholders and the public with information about the Wind Program R&D efforts funded by the Wind and Water Power Technologies Office. The newsletter comes out twice a year and is sent electronically to subscribers and distributed in hard copy to conference attendees.

Radial evolution of nonthermal electron populations in the low-latitude solar wind: Helios, Cluster, and Ulysses Observations

Czech Academy of Sciences Publication Activity Database

Štverák, Štěpán; Maksimovic, M.; Trávníček, Pavel M.; Marsch, E.; Fazakerley, A. N.; Scime, E. E.

2009-01-01

Roč. 114, - (2009), A05104/1-A05104/15 ISSN 0148-0227 Institutional research plan: CEZ:AV0Z30420517; CEZ:AV0Z10030501 Keywords : solar wind * radial evolution * non- thermal electron properties Subject RIV: BL - Plasma and Gas Discharge Physics Impact factor: 3.082, year: 2009

LLW Forum meeting report, July 20--22, 1994

International Nuclear Information System (INIS)

1994-01-01

The Low-Level Radioactive Waste Forum (LLW Forum) is an association of state and compact representative, appointed by governors and compact commissions, established to facilitate state and compact commission implementation of the Low-Level radioactive Waste Policy Act of 1980 and the Low-Level Radioactive Waste Policy Amendments act of 1985 and to promote the objectives of low-level radioactive waste regional compacts. The forum provides an opportunity for states and compacts to share information with one another and to exchange views with officials of federal agencies. This report details activities of the meeting held July 20-22, 1994

Power electronic solutions for interfacing offshore wind turbine generators to medium voltage DC collection grids

Science.gov (United States)

Daniel, Michael T.

Here in the early 21st century humanity is continuing to seek improved quality of life for citizens throughout the world. This global advancement is providing more people than ever with access to state-of-the-art services in areas such as transportation, entertainment, computing, communication, and so on. Providing these services to an ever-growing population while considering the constraints levied by continuing climate change will require new frontiers of clean energy to be developed. At the time of this writing, offshore wind has been proven as both a politically and economically agreeable source of clean, sustainable energy by northern European nations with many wind farms deployed in the North, Baltic, and Irish Seas. Modern offshore wind farms are equipped with an electrical system within the farm itself to aggregate the energy from all turbines in the farm before it is transmitted to shore. This collection grid is traditionally a 3-phase medium voltage alternating current (MVAC) system. Due to reactive power and other practical constraints, it is preferable to use a medium voltage direct current (MVDC) collection grid when siting farms >150 km from shore. To date, no offshore wind farm features an MVDC collection grid. However, MVDC collection grids are expected to be deployed with future offshore wind farms as they are sited further out to sea. In this work it is assumed that many future offshore wind farms may utilize an MVDC collection grid to aggregate electrical energy generated by individual wind turbines. As such, this work presents both per-phase and per-pole power electronic converter systems suitable for interfacing individual wind turbines to such an MVDC collection grid. Both interfaces are shown to provide high input power factor at the wind turbine while providing DC output current to the MVDC grid. Common mode voltage stress and circulating currents are investigated, and mitigation strategies are provided for both interfaces. A power sharing

ELECTRON ACCELERATION IN PULSAR-WIND TERMINATION SHOCKS: AN APPLICATION TO THE CRAB NEBULA GAMMA-RAY FLARES

Energy Technology Data Exchange (ETDEWEB)

Kroon, John J.; Becker, Peter A.; Dermer, Charles D. [Department of Physics and Astronomy, George Mason University, Fairfax, VA 22030-4444 (United States); Finke, Justin D., E-mail: jkroon@gmu.edu, E-mail: pbecker@gmu.edu, E-mail: charlesdermer@outlook.com, E-mail: justin.finke@nrl.navy.mil [Space Science Division, Naval Research Laboratory, Washington, DC 20375 (United States)

2016-12-20

The γ -ray flares from the Crab Nebula observed by AGILE and Fermi -LAT reaching GeV energies and lasting several days challenge the standard models for particle acceleration in pulsar-wind nebulae because the radiating electrons have energies exceeding the classical radiation-reaction limit for synchrotron. Previous modeling has suggested that the synchrotron limit can be exceeded if the electrons experience electrostatic acceleration, but the resulting spectra do not agree very well with the data. As a result, there are still some important unanswered questions about the detailed particle acceleration and emission processes occurring during the flares. We revisit the problem using a new analytical approach based on an electron transport equation that includes terms describing electrostatic acceleration, stochastic wave-particle acceleration, shock acceleration, synchrotron losses, and particle escape. An exact solution is obtained for the electron distribution, which is used to compute the associated γ -ray synchrotron spectrum. We find that in our model the γ -ray flares are mainly powered by electrostatic acceleration, but the contributions from stochastic and shock acceleration play an important role in producing the observed spectral shapes. Our model can reproduce the spectra of all the Fermi -LAT and AGILE flares from the Crab Nebula, using magnetic field strengths in agreement with the multi-wavelength observational constraints. We also compute the spectrum and duration of the synchrotron afterglow created by the accelerated electrons, after they escape into the region on the downstream side of the pulsar-wind termination shock. The afterglow is expected to fade over a maximum period of about three weeks after the γ -ray flare.

Solar wind electron densities from Viking dual-frequency radio measurements

International Nuclear Information System (INIS)

Muhleman, D.O.; Anderson, J.D.

1981-01-01

Simultaneous phase coherent, two-frequency measurements of the time delay between the Earth station and the Viking spacecraft have been analyzed in terms of the electron density profiles from 4 solar radii (R/sub sun/) to 200 R/sub sun/. The measurements were made during a period of solar activity minimum (1976--1977) and show a strong solar latitude effect. The data were analyzed with both a model independent, direct numerical inversion technique and with model fitting, yielding essentially the same results. It is shown that the solar wind density can be represented by two power laws near the solar equator proportional to r/sup -2.7/ and r/sup -2.04/. However, the more rapidly falling term quickly disappears at moderate latitudes (approx.20 0 ), leaving only the inverse-square behavior

JASAL Forum 2011: Growing Trends in Self-Access Learning

Directory of Open Access Journals (Sweden)

Azusa Kodate

2012-03-01

Full Text Available The annual JASAL forum was held in Tokyo in 2011 in keeping with the theme of the JALT 2011 conference, ‘Teaching, Learning, and Growing’.Drawing on the theme of this year’s JASAL forum, ‘Growing Trends in Self-Access Learning’, several different trends emerged from the two paper and five poster presentations that illustrate the ongoing growth of the field. Contents of the presentations varied widely from an administrative operation of a self-access centre (hereafter SAC to research findings about SAC users. Having approximately 45 people including presenters at the forum, active discussions in which they shared ideas and professional practices were generated. One of the common points which emerged in the forum was that the form of learning that SACs provide is becoming more accepted and valued by educational institutions, and this has led to an increase in the number of SACs nationwide in Japan. Against this background, three themes were evident in the presentations given at this year’s forum: focusing on the physical learning environment, providing easier access to learners, and supporting learning processes.

FIAP Forum on Entrepreneurship in Physics

Science.gov (United States)

2015-03-01

With the changes in science as globalization has taken root, the future role of physicists becoming a part of the industrial physics community is more imperative. When 80% of graduating physicists will not be employed in academic positions, and 50% of all jobs for these physicists will be industrial sector, the importance of bringing our next generation of scientists up to speed on industrial applications is becoming much more important with the rapid, world-wide development of technology. FIAP is initiating a forum on entrepreneurship as a major role for the next generation of scientists. As physicists are problem solvers and the entrepreneurial experience is all about problem solving: whether involving technology, building a team, or financing a business. This forum seeks to link successful entrepreneurial physicists with the upcoming generation, through the dissemination of their global expertise and experience. The forum will consist of a panel discussion and then be open to question and answers from the audience.

Web Annotation and Threaded Forum: How Did Learners Use the Two Environments in an Online Discussion?

Science.gov (United States)

Sun, Yanyan; Gao, Fei

2014-01-01

Web annotation is a Web 2.0 technology that allows learners to work collaboratively on web pages or electronic documents. This study explored the use of Web annotation as an online discussion tool by comparing it to a traditional threaded discussion forum. Ten graduate students participated in the study. Participants had access to both a Web…

The Madikwe Forum: a comprehensive partnership for supporting ...

African Journals Online (AJOL)

This article presents findings from a qualitative study of a governance structure of the African Comprehensive HIV/AIDS Partnerships (ACHAP), namely the Madikwe Forum. The investigation sought to critically reflect on the role and effectiveness of the Madikwe Forum in Botswana's response to HIV and AIDS and to ...

Characterization of a Power Electronic Grid Simulator for Wind Turbine Generator Compliance Testing

DEFF Research Database (Denmark)

Glasdam, Jakob Bærholm; Gevorgian, V.; Wallen, R.

2014-01-01

This paper presents the commissioning results and testing capabilities of a multi-megawatt power electronic grid simulator situated in National Renewable Energy Laboratory’s (NREL’s) new testing facility. The commissioning is done using a commercial type 4 multi-megawatt sized wind turbine...... generator (WTG) installed in NREL’s new 5 MW dynamometer and a kilowatt sized type 1 WTG connected to the existing 2.5 MW dynamometer at NREL. The paper demonstrates the outstanding testing capability of the grid simulator and its application in the grid code compliance evaluation of WTGs including balanced...

Cyber-support: an analysis of online self-help forums (online self-help forums in bipolar disorder).

Science.gov (United States)

Bauer, Rita; Bauer, Michael; Spiessl, Hermann; Kagerbauer, Tanja

2013-06-01

The Internet is becoming increasingly important in psychiatry and psychotherapy. The objective of this study was to evaluate if and how online self-help forums are used by patients with bipolar disorders, their relatives and treating professionals. A total of 2400 postings in two online forums were analysed qualitatively and quantitatively. "Disclosure", "friendship" and "online-group cohesion" were the main self-help mechanisms. The topics most discussed were "social network", "symptoms of the illness" and "medication". Factor analyses revealed three factors concerning self-help mechanisms: "group cohesion", "emotional support" and "exchange of information", as well as three factors concerning fields of interest: "illness-related aspects", "social aspects" and "financial and legal issues". We infer that the main interest in participating in online forums for patients with bipolar disorders and their relatives is to share emotions and to discuss their daily struggles with the illness. Our study also reveals that social networking is very important for patients coping with bipolar disorders. Psycho-educative programmes should focus on those aspects.

Simulation study of solar wind push on a charged wire: basis of solar wind electric sail propulsion

Directory of Open Access Journals (Sweden)

P. Janhunen

2007-03-01

Full Text Available One possibility for propellantless propulsion in space is to use the momentum flux of the solar wind. A way to set up a solar wind sail is to have a set of thin long wires which are kept at high positive potential by an onboard electron gun so that the wires repel and deflect incident solar wind protons. The efficiency of this so-called electric sail depends on how large force a given solar wind exerts on a wire segment and how large electron current the wire segment draws from the solar wind plasma when kept at a given potential. We use 1-D and 2-D electrostatic plasma simulations to calculate the force and present a semitheoretical formula which captures the simulation results. We find that under average solar wind conditions at 1 AU the force per unit length is (5±1×10−8 N/m for 15 kV potential and that the electron current is accurately given by the well-known orbital motion limited (OML theory cylindrical Langmuir probe formula. Although the force may appear small, an analysis shows that because of the very low weight of a thin wire per unit length, quite high final speeds (over 50 km/s could be achieved by an electric sailing spacecraft using today's flight-proved components. It is possible that artificial electron heating of the plasma in the interaction region could increase the propulsive effect even further.

Members of the Forum Engelberg visit CERN

CERN Multimedia

Patrice Loïez

2002-01-01

The Forum Engelberg is an annual interdisciplinary conference held in Engelberg, Switzerland intended to act as an international platform for debate and exchange of views on key issues affecting scientific research, technology, economics and philosophy. Its President is Hubert Curien - former French Minister of Research and Space Research, and President of the CERN Council from 1994 to 1996.Seated here at a presentation by Peter Jenni, spokesperson for the ATLAS collaboration, during the visit of Forum members and Geneva public figures are Bernard Ecoffey, Founder of the Forum Engelberg (left), and Jean-Claude Landry, Department of the Interior, Agriculture and Environment, state of Geneva. Photo 01: (left to right) Bernard Ecoffey, Jean-Claude Landry and Peter Jenni. Photos 02, 03: (left to right) Jean-Claude Landry, Bernard Ecoffey and Peter Jenni.

LLW Forum meeting report, October 26--27, 1994

International Nuclear Information System (INIS)

1994-01-01

The Low-Level Radioactive Waste Forum (LLW Forum) is an association of state and compact representatives, appointed by governors and compact commissions, established to facilitate state and compact implementation of the Low-Level Radioactive Waste Policy Act of 1980 and the Low-Level Radioactive Waste Policy Amendments Act of 1985 and to promote the objectives of low-level radioactive waste regional compacts. The LLW Forum provides an opportunity for state and compact officials to share information with one another and to exchange views with officials of federal agencies and other interested parties. This report details activities of the meeting held October 26-27, 1994

LLW Forum meeting report, October 26--27, 1994

Energy Technology Data Exchange (ETDEWEB)

NONE

1994-12-31

The Low-Level Radioactive Waste Forum (LLW Forum) is an association of state and compact representatives, appointed by governors and compact commissions, established to facilitate state and compact implementation of the Low-Level Radioactive Waste Policy Act of 1980 and the Low-Level Radioactive Waste Policy Amendments Act of 1985 and to promote the objectives of low-level radioactive waste regional compacts. The LLW Forum provides an opportunity for state and compact officials to share information with one another and to exchange views with officials of federal agencies and other interested parties. This report details activities of the meeting held October 26-27, 1994.

LLW Forum meeting report, February 13--16, 1996

International Nuclear Information System (INIS)

1996-01-01

The Low-Level Radioactive Waste Forum (LLW Forum) is an association of state and compact representatives, appointed by governors and compact commissions, established to facilitate state and compact implementation of the Low-Level Radioactive Waste Policy Act of 1980 and the Low-Level Radioactive Waste Policy Amendments Act of 1985 and to promote the objectives of low-level radioactive waste regional compacts. The LLW forum provides an opportunity for state and compact officials to share information with one another and to exchange views with officials of federal agencies and other interested parties. This report details activities at the meeting held February 13-16, 1996

Virtual voices: social support and stigma in postnatal mental illness Internet forums.

Science.gov (United States)

Moore, Donna; Ayers, Susan

2017-06-01

Many women with postnatal mental illness do not get the treatment they need and this is often because stigma prevents disclosure. The purpose of this study was to explore online social support for postnatal mental illness, how women experience stigma and potential disadvantages of using Internet forums. Interviews were conducted with fifteen participants who had suffered postnatal mental illness and had used forums. Systematic thematic analysis identified common themes in relation to social support, stigma and disadvantages of using forums. Most women felt they benefited from visiting forums by developing a shared understanding and discourse about their illness. Findings suggest future research should investigate if women benefit from using online social support provided by forums, if use challenges stigma and further explore potential concerns about using forums.

Public Participation Guide: Electronic Democracy

Science.gov (United States)

Electronic democracy describes a wide range of interactive tools that embrace existing and emergent media sources as a forum for allowing members of the public to express opinions and seek to influence decision-making.

Internet-Diskussionsforen als Teil eines studentenzentrierten Lehrkonzepts in der Pharmakologie [Internet discussion forums as part of a student-centred teaching concept of pharmacology

Directory of Open Access Journals (Sweden)

Sarikas, Antonio

2013-02-01

Full Text Available [english] Introduction: The world wide web opens up new opportunities to interconnect electronic and classroom teaching and to promote active student participation. In this project article we describe the use of internet discussion forums as part of a student-centred teaching concept of pharmacology and discuss its advantages and disadvantages based on evaluation data and current literature. Methods and Results: Final year medical students at the Technische Universität München (Munich, Germany with the elective pharmacology moderated an internet forum that allowed all students to discuss pharmacology-related questions. Evaluation results of forum participants and elective students demonstrated a learning benefit of internet forums in pharmacology teaching. Conclusion: Internet discussion forums offer an easy-to-implement and effective way to actively engage students and increase the learning benefit of electronic and classroom teaching in pharmacology. [german] Einleitung und Ziele: Das World Wide Web eröffnet neue Möglichkeiten, Online- und Präsenzlehre zu vernetzen und Studierende aktiv in die Lehre einzubinden. In dieser Projektvorstellung beschreiben wir den Einsatz von Internet-Diskussionsforen als Teil eines studentenzentrierten Lehrkonzepts in der Pharmakologie und diskutieren Vor- und Nachteile anhand von Evaluations- und Literaturdaten. Methode und Ergebnisse: Studierende im praktischen Jahr (PJ mit Wahlfach Pharmakologie übernahmen die Moderation eines Internetforums, das allen Studierenden die zeit- und ortsunabhängige Diskussion pharmakologischer Fragen aus Online- und Präsenzlehre ermöglichte. Evaluationsergebnisse von Forumsteilnehmern und PJ-Studierenden belegten den didaktischen Nutzen von Internetforen für die Pharmakologieausbildung. Schlussfolgerung: Internet-Diskussionsforen bieten eine effektive Möglichkeit, Studierende aktiv in die Lehre einzubinden und den Lernerfolg von Online- und Präsenzlehre zu fördern.

An introduction to reactive power compensation for wind farms

Energy Technology Data Exchange (ETDEWEB)

Nigim, K.A. [Waterloo Univ., Ont. (Canada). Dept. of Electrical and Computer Engineering; Cairo Univ., Giza (Egypt). Faculty of Engineering; Zobaa, A.F.; El Amin, I. [King Fahd Univ. of Petroleum and Minerals, Dhahran (Saudi Arabia). Dept. of Electrical Engineering

2005-07-01

The paper summarises the refereed contributions of seven articles reviewed for publication in the IJETP - Special Issue on 'Reactive compensation for wind farms'. The main goal of the special issue is to provide a forum to exchange information on the reactive power compensation requirements for wind farms and introducing possible price mechanisms for today's deregulated power industry. Uncompensated reactive power causes stress on the hosting utility grid as well as added expenses, which create in difficulties for power purchasing agreements from independent wind energy producers. Wind power producers need to comply with the hosting utility grid interconnection standards, e.g., voltage and frequency, as well as to provide controllable active and reactive sources of power. Active power supply is mainly dependent on the potential of wind power produced and the turbine design. Reactive power demand on the other hand depends on the conversion devices and the recovered power quantity fed to the grid. Static Var Compensators (SVC), Unified Power Quality Conditioners (UPQC), Unified Power Flow Controllers (UPFC), and the Distributed Static Synchronous Compensators (DSTATCOM) are all new emerging devices aimed at regulating the reactive power requirements. The excellent controllability of these devices has paved the way to flexible and dynamic controllers that are capable of regulating the flow of active and reactive power components. These devices are now suggested for the control of the reactive power requirement of wind generators. Studies have demonstrated acceptable voltage stabilisation results. This has increased the penetration level of wind power into existing distribution networks in many countries. (Author)

An introduction to reactive power compensation for wind farms

International Nuclear Information System (INIS)

Nigim, K.A.; Cairo Univ., Giza; Zobaa, A.F.; El Amin, I.

2005-01-01

The paper summarises the refereed contributions of seven articles reviewed for publication in the IJETP - Special Issue on 'Reactive compensation for wind farms'. The main goal of the special issue is to provide a forum to exchange information on the reactive power compensation requirements for wind farms and introducing possible price mechanisms for today's deregulated power industry. Uncompensated reactive power causes stress on the hosting utility grid as well as added expenses, which create in difficulties for power purchasing agreements from independent wind energy producers. Wind power producers need to comply with the hosting utility grid interconnection standards, e.g., voltage and frequency, as well as to provide controllable active and reactive sources of power. Active power supply is mainly dependent on the potential of wind power produced and the turbine design. Reactive power demand on the other hand depends on the conversion devices and the recovered power quantity fed to the grid. Static Var Compensators (SVC), Unified Power Quality Conditioners (UPQC), Unified Power Flow Controllers (UPFC), and the Distributed Static Synchronous Compensators (DSTATCOM) are all new emerging devices aimed at regulating the reactive power requirements. The excellent controllability of these devices has paved the way to flexible and dynamic controllers that are capable of regulating the flow of active and reactive power components. These devices are now suggested for the control of the reactive power requirement of wind generators. Studies have demonstrated acceptable voltage stabilisation results. This has increased the penetration level of wind power into existing distribution networks in many countries. (Author)

"10th Germany at CERN" Industrial Exhibition and the first "Innovation Forum at CERN"

CERN Multimedia

FI Department

2008-01-01

On January 29-30, 2008 On 29 and 30 January 2008, the German Federal Ministry of Education and Research (BMBF) will join forces with CERN in organizing the "10th Germany at CERN" Industrial Exhibition and the first "Innovation Forum at CERN". The Industrial Exhibition provides the opportunity for some 30 German companies to present their products and services to the scientists and buyers of CERN, establish contacts and gather information on future purchasing opportunities. The main subjects will be the following: mechanical engineering, electrical engineering, electronics, civil engineering and buildings, data processing, radiation protection and vacuum and low temperature technology. The first ever "Innovation Forum at CERN" - open to all CERN Member States – will bring together under one roof researchers, innovators, and entrepreneurs to understand and discuss CERN’s applied technology. They will learn about the know-how accumulated through the LHC, the five detectors ...

"10th Germany at CERN" Industrial Exhibition and the first "Innovation Forum at CERN"

CERN Multimedia

FI Department

2008-01-01

29-30 January 2008 On 29 and 30 January 2008, the German Federal Ministry of Education and Research (BMBF) will join forces with CERN in organizing the "10th Germany at CERN" Industrial Exhibition and the first "Innovation Forum at CERN". The Industrial Exhibition will provide the opportunity for some 30 German companies to present their products and services to the scientists and buyers of CERN, establish contacts and gather information on future purchasing opportunities. The main subjects will be the following: mechanical engineering, electrical engineering, electronics, civil engineering and buildings, data processing, radiation protection and vacuum and low temperature technology. The first ever "Innovation Forum at CERN" - open to all CERN Member States - will bring together under one roof researchers, innovators, and entrepreneurs to understand and discuss CERN’s applied technology. They will learn about the know-how accumulated through the LHC, the five detectors ...

Novel Power Electronics Systems for Wind Energy Applications: Final Report; Period of Performance: August 24, 1999 -- November 30, 2002

Energy Technology Data Exchange (ETDEWEB)

Erickson, R.; Angkititrakul, S.; Al-Naseem, O.; Lujan, G.

2004-10-01

The objective of this work was to develop new approaches to the power electronics of variable-speed wind power systems, with the goal of improving the associated cost of energy. Of particular importance is the converter efficiency at low-wind operating points. Developing converter approaches that maintain high efficiency at partial power, without sacrificing performance at maximum power, is desirable, as is demonstrating an approach that can use emerging power component technologies to attain these performance goals with low projected capital costs. In this report, we show that multilevel conversion is an approach that can meet these performance requirements. In the wind power application, multilevel conversion proves superior to conventional converter technologies because it is callable to high power and higher voltage levels, it extends the range of high converter efficiency to lower wind speeds, and it allows superior low-voltage fast-switching semiconductor devices to be used in high-voltage high-power applications.

HNEI wind-hydrogen program

International Nuclear Information System (INIS)

Neill, D.; Holst, B.; Yu, C.; Huang, N.; Wei, J.

1990-01-01

This paper reports on wind powered hydrogen production which is promising for Hawaii because Hawaii's wind energy potential exceeds the state's current electrical energy requirements by more than twenty-fold. Wind energy costs are now approaching $0.06 to $0.08/kWh, and the U.S. Department of Energy has set a goal of $0.04/kWh. These conditions make wind power a good source for electrolytic production of hydrogen. HNEI's wind-hydrogen program, at the HNEI-Kahua Wind Energy Storage Test facility on the island of Hawaii, is developing energy storage and power electronic systems for intermittent wind and solar devices to provide firm power to the utility or to a stand-alone hybrid system. In mid 1990, the first wind-hydrogen production/storage/ generation system is scheduled for installation. HNEI's wind- hydrogen program will provide research, development, demonstration, and education on the great potential and benefits of hydrogen

The Crab Pulsar and Relativistic Wind

Science.gov (United States)

Coroniti, F. V.

2017-12-01

The possibility that the Crab pulsar produces a separated ion-dominated and pair-plasma-dominated, magnetically striped relativistic wind is assessed by rough estimates of the polar cap acceleration of the ion and electron primary beams, the pair production of secondary electrons and positrons, and a simple model of the near-magnetosphere-wind zone. For simplicity, only the orthogonal rotator is considered. Below (above) the rotational equator, ions (electrons) are accelerated in a thin sheath, of order (much less than) the width of the polar cap, to Lorentz factor {γ }i≈ (5{--}10)× {10}7({γ }e≈ {10}7). The accelerating parallel electric field is shorted out by ion-photon (curvature synchrotron) pair production. With strong, but fairly reasonable, assumptions, a set of general magnetic geometry relativistic wind equations is derived and shown to reduce to conservation relations that are similar to those of the wind from a magnetic monopole. The strength of the field-aligned currents carried by the primary beams is determined by the wind’s Alfvén critical point condition to be about eight times the Goldreich-Julian value. A simple model for the transition from the dipole region wind to the asymptotic monopole wind zone is developed. The asymptotic ratio of Poynting flux to ion (pair plasma) kinetic energy flux—the wind {σ }w∞ -parameter—is found to be of order {σ }w∞ ≈ 1/2({10}4). The far wind zone is likely to be complex, with the ion-dominated and pair-plasma-dominated magnetic stripes merging, and the oppositely directed azimuthal magnetic fields annihilating.

STAIF96: space technology and applications international forum. Proceedings

International Nuclear Information System (INIS)

El-Genk, M.S.

1996-01-01

These proceedings represent papers presented at the Space Technology and Applications International Forum-STAIF. STAIF-96 hosted four technical conferences sharing the common interest in space exploration, technology, and commercialization. Topics discussed include space station, space transportation, materials processing in space, commercial forum, space power, commercial space ports, microelectronics, automation of robotics-space application, remote sensing, small business innovative research and communications. There were 243 papers presented at the forum, and 138 have been abstracted for the Energy Science and Technology database. STAIF-96 was partly sponsored by the U.S. Department of Energy

Proceedings of the 2008 air issues forum

Energy Technology Data Exchange (ETDEWEB)

NONE

2008-07-01

This forum focused on air related issues of concern to the oil and gas industry, regulators, researchers and the public. It included technological advances, new research projects, case studies, demonstrations, and updates to environmental regulations. Both the provincial and federal governments have recently announced new and significant reduction targets for air emissions that will have impacts on upstream oil and gas (UOG) companies. This forum reviewed what has been proposed and why and outlined the potential implications for producers. New regulatory processes and their requirements were also discussed along with ongoing industry sponsored air related research and emerging air related issues such as soot formation during flaring, sour gas flare combustion simulation modelling and fugitive emissions reduction. Ten presentations were featured at this forum, of which 3 have been catalogued separately for inclusion in this database. tabs. figs.

Proceedings of the 2008 air issues forum

International Nuclear Information System (INIS)

2008-01-01

This forum focused on air related issues of concern to the oil and gas industry, regulators, researchers and the public. It included technological advances, new research projects, case studies, demonstrations, and updates to environmental regulations. Both the provincial and federal governments have recently announced new and significant reduction targets for air emissions that will have impacts on upstream oil and gas (UOG) companies. This forum reviewed what has been proposed and why and outlined the potential implications for producers. New regulatory processes and their requirements were also discussed along with ongoing industry sponsored air related research and emerging air related issues such as soot formation during flaring, sour gas flare combustion simulation modelling and fugitive emissions reduction. Ten presentations were featured at this forum, of which 3 have been catalogued separately for inclusion in this database. tabs. figs

Electronic Power Transformer Control Strategy in Wind Energy Conversion Systems for Low Voltage Ride-through Capability Enhancement of Directly Driven Wind Turbines with Permanent Magnet Synchronous Generators (D-PMSGs

Directory of Open Access Journals (Sweden)

Hui Huang

2014-11-01

Full Text Available This paper investigates the use of an Electronic Power Transformer (EPT incorporated with an energy storage system to smooth the wind power fluctuations and enhance the low voltage ride-through (LVRT capability of directly driven wind turbines with permanent magnet synchronous generators (D-PMSGs. The decoupled control schemes of the system, including the grid side converter control scheme, generator side converter control scheme and the control scheme of the energy storage system, are presented in detail. Under normal operating conditions, the energy storage system absorbs the high frequency component of the D-PMSG output power to smooth the wind power fluctuations. Under grid fault conditions, the energy storage system absorbs the redundant power, which could not be transferred to the grid by the EPT, to help the D-PMSG to ride through low voltage conditions. This coordinated control strategy is validated by simulation studies using MATLAB/Simulink. With the proposed control strategy, the output wind power quality is improved and the D-PMSG can ride through severe grid fault conditions.

LLW Forum meeting report, April 18--19, 1991

International Nuclear Information System (INIS)

1991-01-01

The Low-Level Radioactive Waste Forum is an association of representatives of states and compacts established to facilitate state and compact commission implementation of the Low-Level Radioactive Waste Policy Act of 1980 and the Low-Level Radioactive Waste Policy Amendments Act of 1985 and to promote the objectives of low-level radioactive waste regional compacts. The Forum provides an opportunity for states and compacts to share information with one another and to exchange views with officials of federal agencies. LLW Forum participants include representatives from regional compacts, designated host states, unaffiliated states, and states with currently- operating low-level radioactive waste facilities. This quarterly meeting was held on April 18-19, 1991

Members of the Forum Engelberg visit CERN

CERN Multimedia

Patrice Loïez

2002-01-01

The Forum Engelberg is an annual interdisciplinary conference held in Engelberg, Switzerland intended to act as an international platform for debate and exchange of views on key issues affecting scientific research, technology, economics and philosophy. Its President is Hubert Curien - former French Minister of Research and Space Research, and President of the CERN Council from 1994 to 1996. He is seen here (right) in discussion with Bernard Ecoffey, Founder of the Forum Engelberg.

Simulation study of solar wind push on a charged wire: basis of solar wind electric sail propulsion

Directory of Open Access Journals (Sweden)

P. Janhunen

2007-03-01

Full Text Available One possibility for propellantless propulsion in space is to use the momentum flux of the solar wind. A way to set up a solar wind sail is to have a set of thin long wires which are kept at high positive potential by an onboard electron gun so that the wires repel and deflect incident solar wind protons. The efficiency of this so-called electric sail depends on how large force a given solar wind exerts on a wire segment and how large electron current the wire segment draws from the solar wind plasma when kept at a given potential. We use 1-D and 2-D electrostatic plasma simulations to calculate the force and present a semitheoretical formula which captures the simulation results. We find that under average solar wind conditions at 1 AU the force per unit length is (5±1×10⁻⁸ N/m for 15 kV potential and that the electron current is accurately given by the well-known orbital motion limited (OML theory cylindrical Langmuir probe formula. Although the force may appear small, an analysis shows that because of the very low weight of a thin wire per unit length, quite high final speeds (over 50 km/s could be achieved by an electric sailing spacecraft using today's flight-proved components. It is possible that artificial electron heating of the plasma in the interaction region could increase the propulsive effect even further.

Changes in the High-Latitude Topside Ionospheric Vertical Electron-Density Profiles in Response to Solar-Wind Perturbations During Large Magnetic Storms

Science.gov (United States)

Benson, Robert F.; Fainberg, Joseph; Osherovich, Vladimir; Truhlik, Vladimir; Wang, Yongli; Arbacher, Becca

2011-01-01

The latest results from an investigation to establish links between solar-wind and topside-ionospheric parameters will be presented including a case where high-latitude topside electron-density Ne(h) profiles indicated dramatic rapid changes in the scale height during the main phase of a large magnetic storm (Dst wind data obtained from the NASA OMNIWeb database indicated that the magnetic storm was due to a magnetic cloud. This event is one of several large magnetic storms being investigated during the interval from 1965 to 1984 when both solar-wind and digital topside ionograms, from either Alouette-2, ISIS-1, or ISIS-2, are potentially available.

High Power Density Power Electronic Converters for Large Wind Turbines

DEFF Research Database (Denmark)

Senturk, Osman Selcuk

. For these VSCs, high power density is required due to limited turbine nacelle space. Also, high reliability is required since maintenance cost of these remotely located wind turbines is quite high and these turbines operate under harsh operating conditions. In order to select a high power density and reliability......In large wind turbines (in MW and multi-MW ranges), which are extensively utilized in wind power plants, full-scale medium voltage (MV) multi-level (ML) voltage source converters (VSCs) are being more preferably employed nowadays for interfacing these wind turbines with electricity grids...... VSC solution for wind turbines, first, the VSC topology and the switch technology to be employed should be specified such that the highest possible power density and reliability are to be attained. Then, this qualitative approach should be complemented with the power density and reliability...

Power quality improvements of wind farms

Energy Technology Data Exchange (ETDEWEB)

Soebrink, Kent H. [Eltra (Denmark); Stoeber, Ralf; Schettler, Frank; Bergmann, Klaus [Siemens (Germany); Jenkins, Nicholas; Ekanayake, Janaka; Saad-Saoud, Zouhir; Liboa, Maria Luiza; Strbac, Goran [UMIST (United Kingdom); Kaas Pedersen, Joergen; Helgesen Pedersen, Knud Ole [Technical Univ. of Denmark (Denmark)

1998-06-01

The main objective of the project was to investigate how the power quality of the electrical output of wind farms could be improved by the use of modern high power electronic technology. Although the research is of direct application to wind energy it will also be relevant to many other types of small-scale generation embedded in utility distribution networks. The operation of wind turbines with asynchronous generators requires reactive power which, if supplied form the network, leads to low voltages and increased losses. In order to improve the power factor of the generation, fixed capacitors are usually used to provide reactive power. However, if they are sized for the full requirement of the wind farm, they can cause self-excitation and potentially damaging and hazardous overvoltages if the wind turbines` connection with the network is interrupted and they become islanded. An advanced Static VAr Compensator (ASVC) uses a power electronic converter to generate or absorb reactive power. They can be used to provide reactive power with rapid control and with only modestly sized passive components (i.e. small capacitors and reactors). The objective of the project was to combine research and development of this novel form of electronic equipment with its application to increase the use of renewable energy, and wind power in particular, in the European Union. (EG) 19 refs.

Degree and reciprocity of self-disclosure in online forums.

Science.gov (United States)

Barak, Azy; Gluck-Ofri, Orit

2007-06-01

Cyberspace has become a common social environment in which people interact and operate in many ways. The purpose of the present study was to investigate the occurrence and reciprocity of self-disclosure, two subjects that are extensively studied in face-to-face interactions but only to a limited degree in virtual, computer-mediated, textual communication. Data was based on 240 first messages in a thread, sampled in equal numbers from six Internet forums (three discussion and three support groups), and written in equal numbers by each gender, and 240 first responses to them (a total of 480 forum messages). Trained, expert judges blindly rated each message on the degree to which it disclosed personal information, thoughts, and feelings. Linguistic parameters (total number of words and number of first-voice words) were also used as dependent variables. Results showed the following: (a) self-disclosure in support forums was much higher than in discussion forums, in terms of both total number and type of disclosure; (b) messages in support forums were longer and included more first-voice words than in discussion forums; (c) there were no gender differences interacting with level of self-disclosure; (d) reciprocity of self-disclosure was evident, yielding positive correlations between the measures of self-disclosure in messages and responses to them; (e) some differences appeared in level of reciprocity of self-disclosure between male and female participants, with female respondents tending to be more reciprocal than male respondents. The implications of these results are discussed in light of growing social interactions online, and possible applications are suggested.

Members of the Forum Engelberg visit CERN

CERN Multimedia

Patrice Loïez

2002-01-01

The Forum Engelberg is an annual interdisciplinary conference held in Engelberg, Switzerland intended to act as an international platform for debate and exchange of views on key issues affecting scientific research, technology, economics and philosophy. Its President is Hubert Curien - former French Minister of Research and Space Research, and President of the CERN Council from 1994 to 1996. He is pictured here (right) alongside CERN Director-General Prof. Luciano Maiani during the visit of Forum members to CERN.

77 FR 15398 - Attentive Driving: Countermeasures for Distraction Forum

Science.gov (United States)

2012-03-15

... NATIONAL TRANSPORTATION SAFETY BOARD Attentive Driving: Countermeasures for Distraction Forum The National Transportation Safety Board (NTSB) will convene a forum, Attentive Driving: Countermeasures for... a period of 3 months from the date of the event. Distracted driving is a serious safety risk on our...

Nuclear waste disposal educational forum

International Nuclear Information System (INIS)

1982-01-01

In keeping with a mandate from the US Congress to provide opportunities for consumer education and information and to seek consumer input on national issues, the Department of Energy's Office of Consumer Affairs held a three-hour educational forum on the proposed nuclear waste disposal legislation. Nearly one hundred representatives of consumer, public interest, civic and environmental organizations were invited to attend. Consumer affairs professionals of utility companies across the country were also invited to attend the forum. The following six papers were presented: historical perspectives; status of legislation (Senate); status of legislation (House of Representatives); impact on the legislation on electric utilities; impact of the legislation on consumers; implementing the legislation. All six papers have been abstracted and indexed for the Energy Data Base

Development of Trust in an Online Breast Cancer Forum: A Qualitative Study.

Science.gov (United States)

Lovatt, Melanie; Bath, Peter A; Ellis, Julie

2017-05-23

Online health forums provide peer support for a range of medical conditions including life-threatening and terminal illnesses. Trust is an important component of peer-to-peer support, although relatively little is known about how trust forms within online health forums. The aim of this paper is to examine how trust develops and influences sharing among users of an online breast cancer forum. An interpretive qualitative approach was adopted. Data were collected from forum posts from 135 threads on 9 boards on the UK charity, Breast Cancer Care (BCC). Semistructured interviews were conducted with 14 BCC forum users. Both datasets were analyzed thematically using Braun and Clarke's approach and combined to triangulate analysis. Trust operates in 3 dimensions, structural, relational, and temporal, and these intersect with each other and do not operate in isolation. The structural dimension relates to how the affordances and formal rules of the site affected trust. The relational dimension refers to how trust was necessarily experienced in interactions with other forum users: it emerged within relationships and was a social phenomenon. The temporal dimension relates to how trust changed over time and was influenced by the length of time users spent on the forum. Trust is a process that changes over time and which is influenced by structural features of the forum, as well as informal but collectively understood relational interactions among forum users. The study provides a better understanding of how the intersecting structural, relational, and temporal aspects that support the development of trust facilitate sharing in online environments. These findings will help organizations developing online health forums. ©Melanie Lovatt, Peter A Bath, Julie Ellis. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 23.05.2017.

LLW Forum meeting report, April 25--27, 1994

International Nuclear Information System (INIS)

1994-01-01

The Low-Level radioactive Waste Forum is an association of representatives of states and compacts established to facilitate state and compact commission implementation of the Low-Level Radioactive Waste Policy Act of 1980 and the Low-Level Radioactive Waste Policy Amendments Act of 1985 and to promote the objectives of low-level radioactive waste regional compacts. The Forum provides an opportunity for states and compacts to share information with one another and to exchange views with officials of federal agencies. LLW Forum participants include representatives from regional compacts, designated host states, unaffiliated states, and states with currently-operating low-level radioactive waste facilities. This quarterly meeting was held April 25-27, 1994 and activities during the first quarter of 1994 are detailed

Analysis of user activities on popular medical forums

Science.gov (United States)

Kamalov, M. V.; Dobrynin, V. Y.; Balykina, Y. E.; Martynov, R. S.

2017-10-01

The paper is devoted to detailed investigation of users’ behavior and level of expertise on online medical forums. Two popular forums were analyzed in terms of presence of experts who answer health related questions and participate in discussions. This study provides insight into the quality of medical information that one can get from the web resources, and also illustrates relationship between approved medical experts and popular authors of the considered forums. During experiments several machine learning and natural language processing methods were evaluated against to available web content to get further understanding of structure and distribution of information about medicine available online nowadays. As a result of this study the hypothesis of existing correlation between approved medical experts and popular authors has been rejected.

LLW Forum meeting report, April 25--27, 1994

Energy Technology Data Exchange (ETDEWEB)

NONE

1994-12-31

The Low-Level radioactive Waste Forum is an association of representatives of states and compacts established to facilitate state and compact commission implementation of the Low-Level Radioactive Waste Policy Act of 1980 and the Low-Level Radioactive Waste Policy Amendments Act of 1985 and to promote the objectives of low-level radioactive waste regional compacts. The Forum provides an opportunity for states and compacts to share information with one another and to exchange views with officials of federal agencies. LLW Forum participants include representatives from regional compacts, designated host states, unaffiliated states, and states with currently-operating low-level radioactive waste facilities. This quarterly meeting was held April 25-27, 1994 and activities during the first quarter of 1994 are detailed..

Proceedings of the Canadian Wind Energy Association's 2010 annual conference and exhibition

International Nuclear Information System (INIS)

2010-01-01

The wind power industry is now experiencing rapid growth in many of the developed countries who seek to expand their renewable energy portfolios and reduce harmful emissions into the atmosphere. The annual Canadian Wind Energy Association (CanWEA) conference and exhibition provides a forum for members of the wind power industry as well as various other experts and stakeholders to exchange information and to discuss innovations and technologies designed to increase wind power capacity in Canada. The environmental impacts of wind turbines were examined, as well as some of the issues that are currently inhibiting growth of the wind power industry. New construction and operational strategies were presented. Business approaches for ensuring adequate investment in the industry were reviewed, and recommendations for government regulations and renewable energy investment incentives were provided. Advances in forecasting were outlined, and issues currently influencing the electric power industry in relation to wind power, reliability, and growth were also discussed. Methods of ensuring the reliability and safety of turbines in the event of icing and other meteorological events were also presented. The conference was divided into the following 5 tracks over a 3 day period: (1) project assessment, (2) project development, (3) business development, (4) technical, and (5) small wind. Each track was further sub-divided into sessions that covered a range of topics. Twenty-nine presentations were included in a poster session. The conference featured 118 presentations, of which 108 have been catalogued separately for inclusion in this database. refs., tabs.

Views on alternative forums for effectively tackling climate change

Science.gov (United States)

Hjerpe, Mattias; Nasiritousi, Naghmeh

2015-09-01

This year (2015) marks the 21st formal anniversary of the United Nations Framework Convention on Climate Change (UNFCCC) and in December a new climate treaty is expected to be reached. Yet, the UNFCCC has not been successful in setting the world on a path to meet a target to prevent temperatures rising by more than 2 °C above pre-industrial levels. Meanwhile, other forums, such as the G20 and subnational forums, have increasingly become sites of climate change initiatives. There has, however, so far been no systematic evaluation of what forums climate change policymakers and practitioners perceive to be needed to effectively tackle climate change. Drawing on survey data from two recent UNFCCC Conference of the Parties (COP), we show that there exists an overall preference for state-led, multilateral forums. However, preferences starkly diverge between respondents from different geographical regions and no clear alternative to the UNFCCC emerges. Our results highlight difficulties in coordinating global climate policy in a highly fragmented governance landscape.

Resources for Creating Another World: Financial Strategies of the World Social Forum

OpenAIRE

Liliana Diaz

2006-01-01

Liliana Diaz analyzes the financial structure and strategy of the World Social Forum (WSF). Considering the importance of the ‘participative budget’ as an initiative promoted by the Forum, she looks at this as a strategy to finance the WSF, and as a model by other social movements. Diaz examines six different funding arrangements in each of the Forums looking at the consequences of the financing arrangements for the sustainability of the Forum process. Development (2006) 49, 93–101. doi:10.10...

National Information Infrastructure Education Forum: A summary report

Energy Technology Data Exchange (ETDEWEB)

Tonn, B.E.; Oliver, C.E.

1994-05-01

The National Information Infrastructure (NII) Education Forum was held on October 6-8, 1993, in Arlington, Virginia. The Forum was sponsored by the Office of Scientific Computing, U.S. Department of Energy (DOE). Its purpose was to discuss technology for K-12 education and what role DOE and its national laboratories could play in developing, disseminating, and using technology for K-12. The Forum brought together over 120 people from across the nation. Participants represented six groups: national laboratories; education research institutions; K-12 teachers and administrators; industry; federal agencies; and other institutions. The Forum consisted of a series of structured presentations from each of these six groups; technology demonstrations; and open, small group discussions. The presentations covered the following: important K-12 education and computing issues, national laboratory capabilities, other federal sector initiatives, and industry perspectives. The demonstration room had over 20 computers networked to the Internet. Workshop participants were shown (1) how to use the Internet to access resources anywhere in the world, (2) state-of-the-art network video teleconferencing technology, (3) multi-media technology, and (4) various other educational software systems.

Impact of Neutrino Flavor Oscillations on the Neutrino-driven Wind Nucleosynthesis of an Electron-capture Supernova

Science.gov (United States)

Pllumbi, Else; Tamborra, Irene; Wanajo, Shinya; Janka, Hans-Thomas; Hüdepohl, Lorenz

2015-08-01

Neutrino oscillations, especially to light sterile states, can affect nucleosynthesis yields because of their possible feedback effect on the electron fraction (Ye). For the first time, we perform nucleosynthesis calculations for neutrino-driven wind trajectories from the neutrino-cooling phase of an 8.8 {M}⊙ electron-capture supernova (SN), whose hydrodynamic evolution was computed in spherical symmetry with sophisticated neutrino transport and whose Ye evolution was post-processed by including neutrino oscillations between both active and active-sterile flavors. We also take into account the α-effect as well as weak magnetism and recoil corrections in the neutrino absorption and emission processes. We observe effects on the Ye evolution that depend in a subtle way on the relative radial positions of the sterile Mikheyev-Smirnov-Wolfenstein resonances, on collective flavor transformations, and on the formation of α particles. For the adopted SN progenitor, we find that neutrino oscillations, also to a sterile state with eV mass, do not significantly affect the element formation and in particular cannot make the post-explosion wind outflow neutron-rich enough to activate a strong r-process. Our conclusions become even more robust when, in order to mimic equation-of-state-dependent corrections due to nucleon potential effects in the dense-medium neutrino opacities, six cases with reduced Ye in the wind are considered. In these cases, despite the conversion of active neutrinos to sterile neutrinos, Ye increases or is not significantly lowered compared to the values obtained without oscillations and active flavor transformations. This is a consequence of a complicated interplay between sterile-neutrino production, neutrino-neutrino interactions, and α-effect.

Proceedings of CanWEA's 24. annual conference and trade show : fast forward to wind

International Nuclear Information System (INIS)

2008-01-01

The Canadian Wind Energy Association's conference and trade show provides an annual forum for wind developers, wind turbine manufacturers, component suppliers and electric utility operators to discuss issues currently facing the wind industry and measures that must be taken to ensure its future growth in Canada. As part of a range of renewable energy initiatives designed to help Canada reach its target commitments for the Kyoto Protocol, the expansion of the wind industry is expected to reduce the country's greenhouse gas (GHG) emissions and provide significant economic benefits to local communities. However, the wind industry is facing a number of challenges and constraints due to a lack of clear policies from provincial and federal governments. Significant infrastructure investments and financial incentives will need to be put in place in order to provide a secure foundation for future growth. The conference was divided into 3 tracks: (1) wind energy enhancement in Canada; (2) trends in wind research and development; and (3) the business of wind. Presentations examined solutions related to wind energy integration with electricity grids and discussed methods of building social acceptance of wind projects in communities. Advances in forecasting and computerized simulations were presented, and methods of negotiating environmental assessments and planning permit requirements were discussed. The conference also included a small wind pre-conference that addressed issues related to the growth and manufacturing of small wind turbines in Canada. The conference featured 88 presentations, of which 69 have been catalogued separately for inclusion in this database. tabs., figs

Members of the Forum Engelberg visit CERN

CERN Multimedia

Patrice Loïez

2002-01-01

The Forum Engelberg is an annual interdisciplinary conference held in Engelberg, Switzerland intended to act as an international platform for debate and exchange of views on key issues affecting scientific research, technology, economics and philosophy. Its President is Hubert Curien - former French Minister of Research and Space Research, and President of the CERN Council from 1994 to 1996. Photo 01: Raymond Battistella - Director-General of SIG, Geneva's utilities provider (left) - and Bernard Ecoffey, Founder of the Forum Engelberg. In the background is the CMS magnet system under construction. The red concentric rings are part of the barrel yoke, which returns the magnetic flux generated by the superconducting coil. Supported from the innermost barrel ring is the outer cylinder of the vacuum tank that will house the superconducting coil. Photo 02: Alexander Höchli, member of the Institutional Committee of Forum Engelberg and former Landammann of the canton of Obwalden (left), with Raymond Battistella, Di...

Global Forum for Health Research 2008-2009 | IDRC - International ...

International Development Research Centre (IDRC) Digital Library (Canada)

Since its foundation in 1998, the Global Forum for Health Research (GFHR) has sought to focus greater attention and resources on research that will improve the health of the poor, marginalized and disadvantaged. The Forum has also become an authoritative and independent source of reliable data, practical tools and ...

Forum on specification and Design Languages

CERN Document Server

Maehne, Torsten

2015-01-01

This book brings together a selection of the best papers from the sixteenth edition of the Forum on specification and Design Languages Conference (FDL), which was held in September 2013 in Paris, France. FDL is a well-established international forum devoted to dissemination of research results, practical experiences and new ideas in the application of specification, design and verification languages to the design, modeling and verification of integrated circuits, complex hardware/software embedded systems, and mixed-technology systems. • Covers applications of formal methods for specification, verification and debug; • Includes embedded analog and mixed-signal system design; • Enables model-driven engineering for embedded systems design and development.

EUFOREA Rhinology Research Forum 2016

DEFF Research Database (Denmark)

Hellings, P W; Akdis, C A; Bachert, C

2017-01-01

The first European Rhinology Research Forum organized by the European Forum for Research and Education in Allergy and Airway Diseases (EUFOREA) was held in the Royal Academy of Medicine in Brussels on 17th and 18th November 2016, in collaboration with the European Rhinologic Society (ERS......) and the Global Allergy and Asthma European Network (GA2LEN). One hundred and thirty participants (medical doctors from different specialties, researchers, as well as patients and industry representatives) from 27 countries took part in the multiple perspective discussions including brainstorming sessions on care...... pathways and research needs in rhinitis and rhinosinusitis. The debates started with an overview of the current state of the art, including weaknesses and strengths of the current practices, followed by the identification of essential research needs, thoroughly integrated in the context of Precision...

Members of the Forum Engelberg visit CERN

CERN Multimedia

Patrice Loïez

2002-01-01

The Forum Engelberg is an annual interdisciplinary conference held in Engelberg, Switzerland intended to act as an international platform for debate and exchange of views on key issues affecting scientific research, technology, economics and philosophy. Its President is Hubert Curien - former French Minister of Research and Space Research, and President of the CERN Council from 1994 to 1996. Horst Wenninger (left) in animated discussion with Alexander Höchli, member of the Institutional Committee of Forum Engelberg and former Landammann of the canton of Obwalden.

Electrostatic Solitary Waves in the Solar Wind: Evidence for Instability at Solar Wind Current Sheets

Science.gov (United States)

Malaspina, David M.; Newman, David L.; Wilson, Lynn Bruce; Goetz, Keith; Kellogg, Paul J.; Kerstin, Kris

2013-01-01

A strong spatial association between bipolar electrostatic solitary waves (ESWs) and magnetic current sheets (CSs) in the solar wind is reported here for the first time. This association requires that the plasma instabilities (e.g., Buneman, electron two stream) which generate ESWs are preferentially localized to solar wind CSs. Distributions of CS properties (including shear angle, thickness, solar wind speed, and vector magnetic field change) are examined for differences between CSs associated with ESWs and randomly chosen CSs. Possible mechanisms for producing ESW-generating instabilities at solar wind CSs are considered, including magnetic reconnection.

Electronic commerce: wiring the coal industry for new data technology

Energy Technology Data Exchange (ETDEWEB)

Carter, R.A.

1998-07-01

Industry pundits predict that coal by wire may some day replace much of the industry`s long-distance shipping requirements and their attendant costs, but data by wire, also known as electronic commerce (EC) can today offer coal producers and customers the means to gather and send large volumes of data cheaply and quickly. EC`s major components - electronic data interchange (EDI), bar-coding, smart codes, radio frequency `D`, and the internet - can reduce costs in equipment-intensive industries such as mining. The US National Mining Association sponsored a forum to discuss these alternatives at its 1998 Electronic Commerce Summit held in Tuscon, Arizona, 18-20 May. A report is given of discussions at the forum and contacts are given for sources of EDI information.

Ion acoustic waves in the solar wind

International Nuclear Information System (INIS)

Gurnett, D.A.; Frank, L.A.

1978-01-01

Plasma wave measurements on the Helios I and 2 spacecraft have revealed the occurrence of electric field turbulence in the solar wind at frequencies between the electron and ion plasma frequencies. Wavelength measurements with the Imp 6 spacecraft now provide strong evidence that these waves are short-wavelength ion acoustic waves which are Doppler-shifted upward in frequency by the motion of the solar wind. Comparison of the Helios results with measurements from the earth-orbiting Imp 6 and 8 spacecraft shows that the ion acoustic turbulence detected in interplanetary space has characteristics essentially identical to those of bursts of electrostatic turbulence generated by protons streaming into the solar wind from the earth's bow shock. In a few cases, enhanced ion acoustic wave intensities have been observed in direct association with abrupt increases in the anisotropy of the solar wind electron distribution. This relationship strongly suggests that the ion acoustic waves detected by Helios far from the earth are produced by an electron heat flux instability, as was suggested by Forslund. Possible related mechanisms which could explain the generation of ion acoustic waves by protons streaming into the solar wind from the earth's bow shock are also considered

Forum Guide to Education Data Privacy. NFES 2016-096

Science.gov (United States)

National Forum on Education Statistics, 2016

2016-01-01

The National Forum on Education Statistics (Forum) organized the Education Data Privacy Working Group to explore how state and local education agencies (SEAs and LEAs) can support best practices at the school level to protect the confidentiality of student data in day-to-day instructional and administrative tasks. Many of the best practices…

Wind energy handbook

CERN Document Server

Burton, Tony; Sharpe, David; Bossanyi, Ervin

2011-01-01

Named as one of Choice's Outstanding Academic Titles of 2012Every year, Choice subject editors recognise the most significant print and electronic works reviewed in Choice during the previous calendar year. Appearing annually inChoice's January issue, this prestigious list of publications reflects the best in scholarly titles and attracts extraordinary attention from the academic library community. The authoritative reference on wind energy, now fully revised and updated to include offshore wind power<

California Geothermal Forum: A Path to Increasing Geothermal Development in California

Energy Technology Data Exchange (ETDEWEB)

Young, Katherine R. [National Renewable Energy Lab. (NREL), Golden, CO (United States)

2017-01-01

The genesis of this report was a 2016 forum in Sacramento, California, titled 'California Geothermal Forum: A Path to Increasing Geothermal Development in California.' The forum was held at the California Energy Commission's (CEC) headquarters in Sacramento, California with the primary goal being to advance the dialogues for the U.S. Department of Energy's Geothermal Technologies Office (GTO) and CEC technical research and development (R&D) focuses for future consideration. The forum convened a diverse group of stakeholders from government, industry, and research to lay out pathways for new geothermal development in California while remaining consistent with critical Federal and State conservation planning efforts, particularly at the Salton Sea.

ON QUIET-TIME SOLAR WIND ELECTRON DISTRIBUTIONS IN DYNAMICAL EQUILIBRIUM WITH LANGMUIR TURBULENCE

International Nuclear Information System (INIS)

Zaheer, S.; Yoon, P. H.

2013-01-01

A recent series of papers put forth a self-consistent theory of an asymptotically steady-state electron distribution function and Langmuir turbulence intensity. The theory was developed in terms of the κ distribution which features Maxwellian low-energy electrons and a non-Maxwellian energetic power-law tail component. The present paper discusses a generalized κ distribution that features a Davydov-Druyvesteyn type of core component and an energetic power-law tail component. The physical motivation for such a generalization is so that the model may reflect the influence of low-energy electrons interacting with low-frequency kinetic Alfvénic turbulence as well as with high-frequency Langmuir turbulence. It is shown that such a solution and the accompanying Langmuir wave spectrum rigorously satisfy the balance requirement between the spontaneous and induced emission processes in both the particle and wave kinetic equations, and approximately satisfy the similar balance requirement between the spontaneous and induced scattering processes, which are nonlinear. In spite of the low velocity modification of the electron distribution function, it is shown that the resulting asymptotic velocity power-law index α, where f e ∼ v –α is close to the average index observed during the quiet-time solar wind condition, i.e., α ∼ O(6.5) whereas α average ∼ 6.69, according to observation

Geosynchronous Relativistic Electron Events Associated with High-Speed Solar Wind Streams in 2006

Directory of Open Access Journals (Sweden)

Sungeun Lee

2009-12-01

Full Text Available Recurrent enhancements of relativistic electron events at geosynchronous orbit (GREEs were observed in 2006. These GREE enhancements were associated with high-speed solar wind streams coming from the same coronal hole. For the first six months of 2006, the occurrence of GREEs has 27 day periodicity and the GREEs were enhanced with various flux levels. Several factors have been studied to be related to GREEs: (1 High speed stream, (2 Pc5 ULF wave activity, (3 Southward IMF Bz, (4 substorm occurrence, (5 Whistler mode chorus wave, and (6 Dynamic pressure. In this paper, we have examined the effectiveness about those parameters in selected periods.

NASA SMD Science Education and Public Outreach Forums: A Five-Year Retrospective

Science.gov (United States)

Smith, Denise A.; Peticolas, Laura; Schwerin, Theresa; Shipp, Stephanie

2014-06-01

NASA’s Science Mission Directorate (SMD) created four competitively awarded Science Education and Public Outreach Forums (Astrophysics, Heliophysics, Planetary Science, Earth Science) in 2009. The objective is to enhance the overall coherence of SMD education and public outreach (E/PO), leading to more effective, efficient, and sustainable use of SMD science discoveries and learning experiences. We summarize progress and next steps towards achieving this goal with examples drawn from Astrophysics and cross-Forum efforts. Over the past five years, the Forums have enabled leaders of individual SMD mission and grant-funded E/PO programs to work together to place individual science discoveries and learning resources into context for audiences, conveying the big picture of scientific discovery based on audience needs. Forum-organized collaborations and partnerships extend the impact of individual programs to new audiences and provide resources and opportunities for educators to engage their audiences in NASA science. Similarly, Forum resources support scientists and faculty in utilizing SMD E/PO resources. Through Forum activities, mission E/PO teams and grantees have worked together to define common goals and provide unified professional development for educators (NASA’s Multiwavelength Universe); build partnerships with libraries to engage underserved/underrepresented audiences (NASA Science4Girls and Their Families); strengthen use of best practices; provide thematic, audience-based entry points to SMD learning experiences; support scientists in participating in E/PO; and, convey the impact of the SMD E/PO program. The Forums have created a single online digital library (NASA Wavelength, http://nasawavelength.org) that hosts all peer-reviewed SMD-funded education materials and worked with the SMD E/PO community to compile E/PO program metrics (http://nasamissionepometrics.org/). External evaluation shows the Forums are meeting their objectives. Specific examples

Older people’s forums in the United Kingdom:Civic engagement and activism reviewed

OpenAIRE

Manthorpe, Jill; Harris, Jessica; Mauger, Sam

2016-01-01

PurposeThis paper reviews the literature on UK older people’s forums. Forums seek to influence statutory responses to ageing, and enable older people to speak up on matters important to them. The review examined three facets of forums: their membership, structures and effectiveness.MethodsMethods included searching databases, internet and specialist libraries for materials relating to older people’s forums. Key points were extracted and source material described but not subject to quality app...

Bridging Divides for Water? Dialogue and Access at the 5th World Water Forum

Directory of Open Access Journals (Sweden)

Nícola Ulibarrí

2011-10-01

Full Text Available The 5th World Water Forum was officially presented as a deliberative democracy where diverse stakeholders could gather to talk about water. However, the conference was marred by significant conflict, ranging from audience complaints to protests, and to alternative political declarations. This paper explores why a Forum designed to 'Bridge Divides for Water' (the official theme was so contentious that participants were unable to reach any sort of consensus. I explore four hypothesised mechanisms by which the Forum itself counteracted the possibility of Bridging Divides and creating constructive dialogue. First, I argue that, because of cost, security and size, the Forum made many participants feel unable to fully access the Forum and share their opinions. Second, I suggest that the programmatic structure of the Forum promoted simplified ways of talking about water that made translation between perspectives difficult. Third, I contend that the physical space where Forum deliberations occurred institutionalised unequal social arrangements, making certain viewpoints more audible than others. Fourth, I demonstrate that the Turkish host government actively masked contestation to present a 'civilised' Forum to the world.

China Textile Round Table Forum Fabrics:International Trend and Marketing

Institute of Scientific and Technical Information of China (English)

2007-01-01

On April 8,2007,China Textile Round Table Forum: Profesional Market Forum (Guangzhou 2007) was held in China Fabrics & Accessories Center.Representatives from many countries and regions,leaderships from Chinese textile and garment industry,as well as experts and corporated

Forum Engelberg 2004 to be launched in Bern on 13 November

CERN Multimedia

2003-01-01

"Former French science minister Hubert Curien will be among major figures from European politics and science meeting in Bern on 13 November to launch the Forum Engelberg 2004.... Forum Engelberg provides a valuable platform for science and a forum for scientists and politicians to meet. The topic of its 2004 conference, to be held in Lucerne from 1 to 4 March 2004, is "Science on the Agenda of European Politics" (1 page).

DTU contributions to IEA Wind Annex 25 Phase 2

Energy Technology Data Exchange (ETDEWEB)

Soerensen, Poul; Cutululis, N.; Meibom, P.

2012-10-15

The objective of Task 25 is to analyse and further develop the methodology to assess the impact of wind power on power systems. The Task has established an international forum for exchange of knowledge and experiences related to power system operation with large amounts of wind power and has actively followed parallel activities with Transmission System Operators other R and D Task work. The participants have collected and shared information on the experience gained and the studies made up to and during the task. The case studies have addressed different aspects of power system operation and design, mainly: balancing, grid impacts and capacity credit of wind power. In the meetings, all participants have made presentations of the wind integration issues in their country, results so far and on-going activities. In the latest meetings presentations have been grouped to different topics to better dwell into the details of modelling challenges. In addition, there has been some telephone/web meetings for the journal articles and Recommendations report. In the Task 25 meetings, updates from other international work are also given (EU/TPWIND and SET-Plan, IEEE, IPCC). TSO collaboration is important for Task 25 work. There has been TSO participation in all meetings, with the participants from Canada, Denmark and Italy in most meetings and some other countries sending TSO participants in fewer meetings. (Author)

Wind Turbine Radar Cross Section

Directory of Open Access Journals (Sweden)

David Jenn

2012-01-01

Full Text Available The radar cross section (RCS of a wind turbine is a figure of merit for assessing its effect on the performance of electronic systems. In this paper, the fundamental equations for estimating the wind turbine clutter signal in radar and communication systems are presented. Methods of RCS prediction are summarized, citing their advantages and disadvantages. Bistatic and monostatic RCS patterns for two wind turbine configurations, a horizontal axis three-blade design and a vertical axis helical design, are shown. The unique electromagnetic scattering features, the effect of materials, and methods of mitigating wind turbine clutter are also discussed.

La question de l’efficacité des forums virtuels sur la réussite How effective are virtual forums on succes?

Directory of Open Access Journals (Sweden)

Sandoss Ben Abid Zarrouk

2011-12-01

Full Text Available L’objet de cet article est de tenter de donner une estimation de l’efficacité, en termes de réussite, des forums d’échanges virtuels. C’est à partir de l’étude d’une plateforme de formation d’enseignement en ligne qui permet la préparation au Diplôme d’Accès aux Études Universitaires (DAEU de l’université de Haute Alsace, que nous apportons des éléments de réponses. Les résultats montrent que les étudiants qui utilisent les forums d’échanges afin d’envoyer des messages ont des taux de réussite plus élevés comparativement à ceux qui n’envoient pas de messages.The aim of this paper is to provide an estimation of the effectiveness of Web forums used for online learning. The study of the online learning platform that enables adult students to prepare the DAEU (diploma granting access to university or equivalent at the university of Haute Alsace, provides us with information about this. The results of this research show that students who use discussion forums to post messages have higher success rates than those who do not.

WIND observations of coherent electrostatic waves in the solar wind

Directory of Open Access Journals (Sweden)

A. Mangeney

1999-03-01

Full Text Available The time domain sampler (TDS experiment on WIND measures electric and magnetic wave forms with a sampling rate which reaches 120 000 points per second. We analyse here observations made in the solar wind near the Lagrange point L1. In the range of frequencies above the proton plasma frequency fpi and smaller than or of the order of the electron plasma frequency fpe, TDS observed three kinds of electrostatic (e.s. waves: coherent wave packets of Langmuir waves with frequencies f ~ fpe, coherent wave packets with frequencies in the ion acoustic range fpi < f < fpe, and more or less isolated non-sinusoidal spikes lasting less than 1 ms. We confirm that the observed frequency of the low frequency (LF ion acoustic wave packets is dominated by the Doppler effect: the wavelengths are short, 10 to 50 electron Debye lengths λD. The electric field in the isolated electrostatic structures (IES and in the LF wave packets is more or less aligned with the solar wind magnetic field. Across the IES, which have a spatial width of the order of ~ 25λD, there is a small but finite electric potential drop, implying an average electric field generally directed away from the Sun. The IES wave forms, which have not been previously reported in the solar wind, are similar, although with a smaller amplitude, to the weak double layers observed in the auroral regions, and to the electrostatic solitary waves observed in other regions in the magnetosphere. We have also studied the solar wind conditions which favour the occurrence of the three kinds of waves: all these e.s. waves are observed more or less continuously in the whole solar wind (except in the densest regions where a parasite prevents the TDS observations. The type (wave packet or IES of the observed LF waves is mainly determined by the proton temperature and by the direction of the magnetic field, which themselves depend on the latitude of WIND with respect to the heliospheric current sheet.Key words

THE ENVIRONMENTAL COMMUNICATION FORUM

African Journals Online (AJOL)

could enable the more effective communication of envi:onmental issues, not forgetting the importance ... headquarters, when she explained the psychology used to try to persuade people to care for their environ- ment. ... offering a facility if those to whom it is offered are unaware of its existence, or of its value. This the forum ...

2012 National Leadership Forum

Science.gov (United States)

Magnuson, Peter

2012-01-01

Two key themes emerged from the 2012 National Leadership Forum: Taking Business to School, which was hosted by the Career and Technical Education Foundation at the end of May. The first was that employers are looking for a workforce that is technologically savvy while having leadership and employability skills. The second is that the business…

The Cumbria Rural Health Forum: initiating change and moving forward with technology.

Science.gov (United States)

Ditchburn, Jae-Llane; Marshall, Alison

2016-01-01

The Cumbria Rural Health Forum was formed by a number of public, private and voluntary sector organisations to collaboratively work on rural health and social care in the county of Cumbria, England. The aim of the forum is to improve health and social care delivery for rural communities, and share practical ideas and evidence-based best practice that can be implemented in Cumbria. The forum currently consists of approximately 50 organisations interested in and responsible for delivery of health and social care in Cumbria. An exploration of digital technologies for health and care was recognised as an initial priority. This article describes a hands-on approach undertaken within the forum, including its current progress and development. The forum used a modified Delphi technique to facilitate its work on discussing ideas and reaching consensus to formulate the Cumbria Strategy for Digital Technologies in Health and Social Care. The group communication process took place over meetings and workshops held at various locations in the county. A roadmap for the implementation of digital technologies into health and social care was developed. The roadmap recommends the following: (i) to improve the health outcomes for targeted groups, within a unit, department or care pathway; (ii) to explain, clarify, share good (and bad) practice, assess impact and value through information sharing through conferences and events, influencing and advocacy for Cumbria; and (iii) to develop a digital-health-ready workforce where health and social care professionals can be supported to use digital technologies, and enhance recruitment and retention of staff. The forum experienced issues consistent with those in other Delphi studies, such as the repetition of ideas. Attendance was variable due to the unavailability of key people at times. Although the forum facilitated collective effort to address rural health issues, its power is limited to influencing and supporting implementation of change

Transient analysis of variable-speed wind turbines at wind speed disturbances and a pitch control malfunction

International Nuclear Information System (INIS)

Melicio, R.; Mendes, V.M.F.; Catalao, J.P.S.

2011-01-01

As wind power generation undergoes rapid growth, new technical challenges emerge: dynamic stability and power quality. The influence of wind speed disturbances and a pitch control malfunction on the quality of the energy injected into the electric grid is studied for variable-speed wind turbines with different power-electronic converter topologies. Additionally, a new control strategy is proposed for the variable-speed operation of wind turbines with permanent magnet synchronous generators. The performance of disturbance attenuation and system robustness is ascertained. Simulation results are presented and conclusions are duly drawn.

Transient analysis of variable-speed wind turbines at wind speed disturbances and a pitch control malfunction

Energy Technology Data Exchange (ETDEWEB)

Melicio, R. [Department of Electromechanical Engineering, University of Beira Interior, R. Fonte do Lameiro, 6201-001 Covilha (Portugal); Mendes, V.M.F. [Department of Electrical Engineering and Automation, Instituto Superior de Engenharia de Lisboa, R. Conselheiro Emidio Navarro, 1950-062 Lisbon (Portugal); Catalao, J.P.S. [Department of Electromechanical Engineering, University of Beira Interior, R. Fonte do Lameiro, 6201-001 Covilha (Portugal); Center for Innovation in Electrical and Energy Engineering, Instituto Superior Tecnico, Technical University of Lisbon, Av. Rovisco Pais, 1049-001 Lisbon (Portugal)

2011-04-15

As wind power generation undergoes rapid growth, new technical challenges emerge: dynamic stability and power quality. The influence of wind speed disturbances and a pitch control malfunction on the quality of the energy injected into the electric grid is studied for variable-speed wind turbines with different power-electronic converter topologies. Additionally, a new control strategy is proposed for the variable-speed operation of wind turbines with permanent magnet synchronous generators. The performance of disturbance attenuation and system robustness is ascertained. Simulation results are presented and conclusions are duly drawn. (author)

Young physicists' forum

International Nuclear Information System (INIS)

Adams, T.

2001-01-01

The Young Physicists' Forum was an opportunity for the younger members of the particle-physics community to gather at Snowmass 2001 and to study and debate major issues that face the field over the next twenty years. Discussions were organized around three major topics: outreach and education, the impact of globalization, and building a robust and balanced field. We report on the results of these discussions, as presented on July 17, 2001

Implementation Strategy for a Global Solar and Wind Atlas

Energy Technology Data Exchange (ETDEWEB)

NONE

2012-01-15

In July 2009, Major Economies Forum leaders met to prepare for the COP 15 Copenhagen Conference that took place later that year. At this occasion the Major Economies Forum Global Partnership f or low carbon and climate-friendly technology was founded and Technology Action Plans (TAPs) for ten key low-carbon technologies were drafted. At that juncture Denmark, Germany and Spain took on the responsibility for drafting TAPs for Solar and Wind Energy Technologies. The TAPs were then consolidated and presented at COP 15 that would later take place in December in Copenhagen. Since then, countries that led the development of the Action Plans have started their implementation. During a first Clean Energy Ministerial (CEM) in July 2010 in Washington on the invitation of Steven Chu, US Secretary of Energy, several initiatives were launched. Denmark, Germany and Spain took the lead in the implementation of the TAPs for Solar and Wind Technologies and initiated the Multilateral Working Group on Solar and Wind Energy Technologies (MWGSW). Several countries joined the working group in Washington and afterwards. In two international workshops in Bonn (June 2010) and Madrid (November 2010) and in meetings during the first CEM in Washington (July 2010) and the second CEM in Abu Dhabi (April 2011) the Multilateral Working Group made substantial progress in the two initial fields of action: (1) the Development of a Global Solar and Wind Atlas; and (2) the Development of a Long-term Strategy on Joint Capacity Building. Discussion papers on the respective topics were elaborated involving the Working Group's member countries as well as various international institutions. This led to concrete proposals for several pilot activities in both fields of action. After further specifying key elements of the suggested projects in two expert workshops in spring 2011, the Multilateral Working Group convened for a third international workshop in Copenhagen, Denmark, to discuss the project

Online discussion forums with embedded streamed videos on distance courses

Directory of Open Access Journals (Sweden)

Vicenc Fernandez

2014-03-01

Full Text Available Existing literature on education and technology has frequently highlighted the usefulness of online discussion forums for distance courses; however, the majority of such investigations have focused their attention only on text-based forums. The objective of this paper is to determine if the embedding of streamed videos in online discussion forums generates educational dialogue and consequently the feedback that students need in a Management Accounting Course. The findings suggest some interesting issues, such as: students prefer text answers except in complex questions, and videos never replace text commentaries and explanations, but rather complement them.

Reflections on ?medical tourism? from the 2016 Global Healthcare Policy and Management Forum

OpenAIRE

Crooks, Valorie A.; Ormond, Meghann; Jin, Ki Nam

2017-01-01

In October 2016, the Global Healthcare Policy and Management Forum was held at Yonsei University, Seoul, South Korea. The goal of the forum was to discuss the role of the state in regulating and supporting the development of medical tourism. Forum attendees came from 10 countries. In this short report article, we identify key lessons from the forum that can inform the direction of future scholarly engagement with medical tourism. In so doing, we reference on-going scholarly debates about this...

Power Electronics

DEFF Research Database (Denmark)

Iov, Florin; Ciobotaru, Mihai; Blaabjerg, Frede

2008-01-01

is to change the electrical power production sources from the conventional, fossil (and short term) based energy sources to renewable energy resources. The other is to use high efficient power electronics in power generation, power transmission/distribution and end-user application. This paper discuss the most...... emerging renewable energy sources, wind energy, which by means of power electronics are changing from being a minor energy source to be acting as an important power source in the energy system. Power electronics is the enabling technology and the presentation will cover the development in wind turbine...... technology from kW to MW, discuss which power electronic solutions are most feasible and used today....

Competition, Regulation and Development Research Forum ...

International Development Research Centre (IDRC) Digital Library (Canada)

... Forum : Competition and Regulatory Implementation Issues in Developing Countries ... create challenges that influence the operation of regulatory institutions. ... IWRA/IDRC webinar on climate change and adaptive water management.

Colliding winds: Interaction regions with strong heat conduction

International Nuclear Information System (INIS)

Imamura, J.N.; Chevalier, R.A.

1984-01-01

The interaction of fast stellar wind with a slower wind from previous mass loss gives rise to a region of hot, shocked gas. We obtain self-similar solutions for the interaction region under the assumptions of constant mass loss rate and wind velocity for the two winds, conversion of energy in the shock region, and either isothermal electrons and adiabatic ions or isothermal electrons ad ions in the shocked region. The isothermal assumption is intended to show the effects of strog heat conduction. The solutions have no heat conduction through the shock waves and assume that the electron and ion temperatures are equilibriated in the shock waves. The one-temperature isothermal solutions have nearly constant density through the shocked region, while the two-temperature solutions are intermediate between the one-temperature adiabatic and isothermal solutions. In the two-temperature solutions, the ion temperature goes to zero at the point where the gas comoves with the shocked region and the density peaks at this point. The solution may qualitatively describe the effects of heat conduction on interaction regions in the solar wind. It will be important to determine whether the assumption of no thermal waves outside the shocked region applies to shock waves in the solar wind

Gender and Equity: Experience of the Working Women's Forum, India.

Science.gov (United States)

Azad, Nandini

1996-01-01

Illustrates how poor women were able to move out of poverty and dehumanization through a process of mobilization and organization. The process was catalyzed by the intervention of a non-governmental organization, the Working Women's Forum. Outlines the Forum's program of economic, social, and technological empowerment. (MJP)

Reflections on 'medical tourism' from the 2016 Global Healthcare Policy and Management Forum

NARCIS (Netherlands)

Crooks, V.A.; Ormond, M.E.; Jin, Ki Nam

2017-01-01

In October 2016, the Global Healthcare Policy and Management Forum was held at Yonsei University, Seoul, South Korea. The goal of the forum was to discuss the role of the state in regulating and supporting the development of medical tourism. Forum attendees came from 10 countries. In this short

On the Origins of the Intercorrelations Between Solar Wind Variables

Science.gov (United States)

Borovsky, Joseph E.

2018-01-01

It is well known that the time variations of the diverse solar wind variables at 1 AU (e.g., solar wind speed, density, proton temperature, electron temperature, magnetic field strength, specific entropy, heavy-ion charge-state densities, and electron strahl intensity) are highly intercorrelated with each other. In correlation studies of the driving of the Earth's magnetosphere-ionosphere-thermosphere system by the solar wind, these solar wind intercorrelations make determining cause and effect very difficult. In this report analyses of solar wind spacecraft measurements and compressible-fluid computer simulations are used to study the origins of the solar wind intercorrelations. Two causes are found: (1) synchronized changes in the values of the solar wind variables as the plasma types of the solar wind are switched by solar rotation and (2) dynamic interactions (compressions and rarefactions) in the solar wind between the Sun and the Earth. These findings provide an incremental increase in the understanding of how the Sun-Earth system operates.

Low-level waste forum meeting reports

International Nuclear Information System (INIS)

1992-01-01

This report provides highlights from the 1992 fall meeting of the Low LEvel Radioactive Waste Forum. Topics included: disposal options after 1992; interregional agreements; management alternatives; policy; and storage

Members of the Forum Engelberg visit CERN

CERN Multimedia

Patrice Loïez

2002-01-01

The Forum Engelberg is an annual interdisciplinary conference held in Engelberg, Switzerland intended to act as an international platform for debate and exchange of views on key issues affecting scientific research, technology, economics and philosophy. Photo 01: Members of the Forum Engelberg and public figures from Geneva visit SM18, the test hall for LHC magnets: (left to right) N. Siegel, Prof. Dr. Med. Bernard Mach, Mr Alexander Höchli, H. Wenninger, Mrs Mireille Quirina, Mme Konrade Von Bremen, Mrs Thérèse Wolf, Prof. Roger Berthouzoz, Mrs Marie-Anne Heimo, Mr Bernard Ecoffey.

Major economies Forum on energy and climate

International Nuclear Information System (INIS)

2009-01-01

The Major Economies Forum is intended to facilitate an open dialogue among major developed and developing economies, help generate the political leadership necessary to achieve a successful outcome at the United Nations climatic change conference in Copenhagen, and advance the exploration of concrete initiatives and joint ventures that increase the supply of clean energy while cutting greenhouse gas emissions. The Forum's second preparatory meeting was held in Paris in May 2009, mainly focused on greenhouse gas emissions reduction actions and objectives, the diffusion of clean technologies, the financing of activities for climate protection and adaptation to climatic change impacts

Analyses of experimental observations of electron temperatures in the near wake of a model in a laboratory-simulated solar wind plasma

International Nuclear Information System (INIS)

Intriligator, D.S.; Steele, G.R.

1985-01-01

Laboratory experiments have been performed that show the effect on the electron temperature of inserting a spherical conducting model, larger than the Debye length, into a free-streaming high-energy (1 kv) unmagnetized hydrogen plasma. These experiments are the first electron temperature experiments conducted at energies and compositions directly relevant to solar wind and astrophysical plasma phenomena. The incident plasma parameters were held constant. A large number of axial profiles of the electron temperature ratios T/sub e//sub in// T/sub e//sub out/ behind the model downstream in the model wake are presented. A rigorous statistical approach is used in the analysis of the electron temperature ratio data in both our experimental laboratory data and in our reanalysis of the published data of others. The following new results ae obtained: (1) In energetic plasma flow there is no overall temperature enhancement in the near wake since the best fit to the T/sub e//sub i/n/ T/sub e//sub out/ data is a horizontal straight line having a mean value of 1.05; (2) No statistically significant electron temperature enhancement peaks or depressions exist in the near-wake region behind a model at zero potential in a high-energy plasma even at distances less than or equal to Ma, where M is the acoustic Mach number and a is the model radius. This implies a ''filling in'' of electrons in the wake region which may be due to the higher mobility of these energetic electrons. This mechanism may permit the solar wind electrons to significantly contribute to the maintenance of the nightside ionosphere at Venus

Emotional isolation in BBC Forum

International Nuclear Information System (INIS)

Sienkiewicz, J; Chmiel, A

2014-01-01

We analyze emotionally annotated massive data from BBC Forum and examine properties of the isolation phenomenon of negative and positive users. Our results show the existence of a percolation threshold dependent on the average emotional value in the network of negatively charged nodes

Modelling, Analysis and Control of DC-connected Wind Farms to Grid

DEFF Research Database (Denmark)

Iov, Florin; Sørensen, Poul; Hansen, Anca Daniela

2006-01-01

wind turbines/farms are clearly the variable speed operation and a grid connection through a power electronic interface, especially using doubly-fed induction generators. Using power electronics the control capabilities of these wind turbines/farms are extended and thus the grid requirements...... are fulfilled.  However, the traditional squirrel-cage generators based wind turbines/wind farms directly connected to the grid have less control capabilities. These wind turbines/farms cannot regulate their production and contribute to power system stability. A DC transmission system for connection...... of the active stall wind farms to the grid can provide these features and also maximize the produced power especially at low wind speeds by using variable voltage/frequency for the wind farm. The focus in this paper is in studying the variable speed operation for the active stall wind farms using a voltage...

Practicing Multilingual Identities: Online Interactions in a Korean Dramas Forum

Science.gov (United States)

Kim, Grace MyHyun

2016-01-01

This article presents the language practices of global youth who populate an online discussion forum devoted to Korea-produced dramas. Qualitative data included the writing, visual images, and interactions created within the forum. Findings revealed youth from geographically disparate places using new media affordances to engage with a minority…

Spacecraft radio scattering observations of the power spectrum of electron density fluctuations in the solar wind

International Nuclear Information System (INIS)

Woo, R.; Armstrong, J.W.

1979-01-01

Solar wind electron density power spectra in the solar equatorial region are inferred from observations of phase scintillations and spectral broadening made with the Viking, Helios, and Pioneer spacecraft. The heliocentric distance range covered is 2--215 R/sub S/, and for some observations close to the sun the spectra extend to fluctuation frequencies as high as 100 Hz. For heliocentric distances > or approx. =20 R/sub S/ the equivalent spacecraft-measured one-dimensional density spectrym V/sub n/e is well modeled by a single power law (f/sup -alpha/) in the frequency range 10 -4 -5 x 10 -2 Hz. The mean spectral index α is 1.65, very close to the Kolmogorov value of 5/3. Under the assumption of constant solar wind speed, V/sub n/e varies as R/sup -3.45/, where R is heliocentric distance. Within 20 R/sub S/, V/sub n/e can still be modeled by a single power law over the frequency range 10 -3 -10 1 Hz, but the spectral index becomes smaller, αapprox.1.1. The flattening of the density spectrum with 20 R/sub S/ is presumably associated with energy deposition in the near-sun region and acceleration of the solar wind

Radiation protection forum

International Nuclear Information System (INIS)

Cabral, W.

2010-01-01

The National Director of the Nuclear Regulatory Authority and Radiation Protection of Uruguay in the first forum for radiation protection set out the following themes: activity of regulatory body, radiation safety, physical security, safeguards, legal framework, committed substantive program, use of radiation, risks and benefits, major sources of radiation, the national regulatory framework, national inventory of sources, inspections, licensing, import and export of sources control , radioactive transport, materials safety, agreements, information and teaching, radiological emergencies and prompt response.

Proceedings of the Canadian Wind Energy Association's 2010 annual conference and exhibition

Energy Technology Data Exchange (ETDEWEB)

NONE

2010-07-01

The wind power industry is now experiencing rapid growth in many of the developed countries who seek to expand their renewable energy portfolios and reduce harmful emissions into the atmosphere. The annual Canadian Wind Energy Association (CanWEA) conference and exhibition provides a forum for members of the wind power industry as well as various other experts and stakeholders to exchange information and to discuss innovations and technologies designed to increase wind power capacity in Canada. The environmental impacts of wind turbines were examined, as well as some of the issues that are currently inhibiting growth of the wind power industry. New construction and operational strategies were presented. Business approaches for ensuring adequate investment in the industry were reviewed, and recommendations for government regulations and renewable energy investment incentives were provided. Advances in forecasting were outlined, and issues currently influencing the electric power industry in relation to wind power, reliability, and growth were also discussed. Methods of ensuring the reliability and safety of turbines in the event of icing and other meteorological events were also presented. The conference was divided into the following 5 tracks over a 3 day period: (1) project assessment, (2) project development, (3) business development, (4) technical, and (5) small wind. Each track was further sub-divided into sessions that covered a range of topics. Twenty-nine presentations were included in a poster session. The conference featured 118 presentations, of which 108 have been catalogued separately for inclusion in this database. refs., tabs.

How a moderated online discussion forum facilitates support for young people with eating disorders.

Science.gov (United States)

Kendal, Sarah; Kirk, Sue; Elvey, Rebecca; Catchpole, Roger; Pryjmachuk, Steven

2017-02-01

Young people with eating disorders are at risk of harm to their social, emotional and physical development and life chances. Although they can be reluctant to seek help, they may access social media for information, advice or support. The relationship between social media and youth well-being is an emotive subject, but not clearly understood. This qualitative study aimed to explore how young people used a youth-orientated, moderated, online, eating disorders discussion forum, run by an eating disorders charity. We applied a netnographic approach involving downloading and thematically analysing over 400 messages posted August-November 2012. Data analysis generated five themes: Taking on the role of mentor; the online discussion forum as a safe space; Friendship within the online forum; Flexible help; and Peer support for recovery and relapse prevention. Forum moderation may have influenced the forum culture. Our findings are consistent with literature about youth preferences for mental health self-care support. A young person's decision to use this discussion forum can be construed as pro-active self-care. A moderated online discussion forum can make a positive contribution to support for youth with eating disorders, countering negative media perceptions of online groups. This study adds to knowledge about how young people access support via social media. Online discussion forums can be safe and acceptable spaces for youth to access help. Further research could provide insights into the impact of forum moderation. © 2016 The Authors. Health Expectations Published by John Wiley & Sons Ltd.

Peran Forum Pustakawan dalam Pengembangan Profesionalisme Pustakawan di Lingkungan Universitas Gadjah Mada

Directory of Open Access Journals (Sweden)

Desy Natalia Anggorowati

2017-12-01

Full Text Available This research discusses the role of Librarian Forum at UGM. The purpose of this paper is to examine  the role of Librarian Forum to develop professionalism and competence for librarians and to understand the inhibiting factors from librarians to actively involve themselves in the Forum. Using a descriptive qualitative approach, the data collection method was literature study and interviews. The result indicated that the role of Librarian Forum in the last 3 period: 2011-2013, 2013-2015 and 2015-2018 has been indicated important to support 4 competencies in SKKNI (Standar Kompetensi Kerja Nasional Indonesia. But of the 60 activities, the core competence of “conducting information literacy activities” showed  the highest. Challenges faced by the members to utilise the Librarian Forum as a professional development arena and competence was the schedule. Another challenges were that, the content of activities didnot match with what the members needed.

Analysis of Superposters' Motives for Participating in Online Forum Discussions

Directory of Open Access Journals (Sweden)

Irena Miljković Krečar

2017-12-01

Full Text Available The main aim of this study was to identify factors which motivate daily participation of extremely active online forum members. An extensive online questionnaire was constructed and sent to the Forum.hr members with more than 8,000 posts. The final sample consisted of 112 respondents. Principal components analysis provided an interpretable three components solution, explaining 54.6% of the item variance. The components were labelled as self-esteem, information exchange, and confrontation. Some significant differences were also found among motivational subscales and variables of gender, age, and the intensity of forum activity. Results are discussed in relation to previous research.

Students' Learning in Asynchronous Discussion Forums: A Meta-Analysis

Science.gov (United States)

Martono, Fkipuntan; Salam, Urai

2017-01-01

Asynchronous discussion forums are among the most preferred tools chosen to foster learning opportunities and knowledge construction. To reveal the cognitive engagement evidenced in the transcripts of the discussion forums, this study presents 51 papers. 17 papers reported research on students' attitude toward the use of ICT for learning, 16…

NASA Earthdata Forums: An Interactive Venue for Discussions of NASA Data and Earth Science

Science.gov (United States)

Hearty, Thomas J., III; Acker, James; Meyer, Dave; Northup, Emily A.; Bagwell, Ross E.

2017-01-01

We demonstrate how students and teachers can register to use the NASA Earthdata Forums. The NASA Earthdata forums provide a venue where registered users can pose questions regarding NASA Earth science data in a moderated forum, and have their questions answered by data experts and scientific subject matter experts connected with NASA Earth science missions and projects. Since the forums are also available for research scientists to pose questions and discuss pertinent topics, the NASA Earthdata Forums provide a unique opportunity for students and teachers to gain insight from expert scientists and enhance their knowledge of the many different ways that NASA Earth observations can be used in research and applications.

Low-level waste forum meeting reports

International Nuclear Information System (INIS)

Sternwheeler, W.D.E.

1992-01-01

This paper provides highlights from the 1992 winter meeting of the Low Level Radioactive Wastes Forum. Topics of discussion included: legal information; state and compact reports; freedom of information requests; and storage

Titaanide heitlus: Forum Cinemas vs Cinamon

Index Scriptorium Estoniae

2009-01-01

Cinamon Group avab Solarise keskuses uue Cinamoni kinoketti kuuluva kino, mis konkureerib Coca-Cola Plazaga (võrdlev tabel, allikad: Cinamoni turundusjuht Evelyn Laar ja Forum Cinemas' levijuhi asetäitja Timo Diener)

Low-level waste forum meeting reports

International Nuclear Information System (INIS)

1992-01-01

This paper provides highlights from the summer meeting of the Low Level Radioactive Waste Forum. Topics of discussion included: responsibility for nonfuel component disposal; state experiences in facility licensing; and volume projections

Analysis of ISEE-3/ICE solar wind data

Science.gov (United States)

Coplan, Michael A.

1989-01-01

Under the grant that ended November 11, 1988 work was accomplished in a number of areas, as follows: (1) Analysis of solar wind data; (2) Analysis of Giacobini/Zinner encounter data; (3) Investigation of solar wind and magnetospheric electron velocity distributions; and (4) Experimental investigation of the electronic structure of clusters. Reprints and preprints of publications resulting from this work are included in the appendices.

Modeling and Identification of Harmonic Instability Problems In Wind Farms

DEFF Research Database (Denmark)

Ebrahimzadeh, Esmaeil; Blaabjerg, Frede; Wang, Xiongfei

2016-01-01

In power electronics based power systems like wind farms, the interactions between the inner control systems of the power converters and the passive components may lead to high frequency oscillations, which can be called harmonic instability. In this paper, a simple methodology is presented...... to identify harmonic instability problems in wind farms, where many wind turbines, cables, transformers, capacitor banks, shunt reactors, etc, typically are located. This methodology introduces the wind farm as a Multi-Input Multi-Outpur (MIMO) control system, where the linearized models of fast inner control....../EMTDC software environment for a 400-MW wind farm. The proposed analytical analysis method and time-domain simulation results show that both dynamics of the power electronic converter and the parameters of the passive component can effect on the wind farm stability....

Torrenting values, feelings, and thoughts—Cyber nursing and virtual self-care in a breast augmentation forum

Directory of Open Access Journals (Sweden)

Martin Salzmann-Erikson

2011-11-01

Full Text Available Earlier research shows that breast augmentation is positively correlated with positive psychological states. The aim of this study was to explore the shared values, feelings, and thoughts within the culture of breast enlargement among women visiting Internet-based forums when considering and/or undergoing esthetic plastic surgery. The study used a netnographic method for gathering and analyzing data. The findings show that the women used the Internet forum to provide emotional support to other women. Through electronic postings, they cared for and nursed each others’ anxiety and feelings throughout the whole process. Apart from the process, another central issue was that the women's relationships were frequently discussed; specifically their relationship to themselves, their environment, and with the surgeons. The findings suggest that Internet forums represent a channel through which posters can share values, feelings, and thoughts from the position of an agent of action as well as from a position as the object of action. These dual positions and the medium endow the women with a virtual nursing competence that would otherwise be unavailable. By introducing the concept of torrenting as a means of sharing important self-care information, the authors provide a concept that can be further explored in relation to post modern self-care strategies within contemporary nursing theories and practice.

International Ecohealth Forum 2008 | IDRC - International ...

International Development Research Centre (IDRC) Digital Library (Canada)

... the International Forum on Ecosystem Approaches to Human Health (Montreal, ... the International Association of Ecology and Health (IAEH), and a Brazilian ... Nutrition, health policy, and ethics in the age of public-private partnerships.

Research Developments on Power System Integration of Wind Power

DEFF Research Database (Denmark)

Chen, Zhe; Hansen, Jens Carsten; Wu, Qiuwei

2011-01-01

variability and prediction, wind power plant ancillary services, grid connection and operation, Smart grids and demand side management under market functionality. The topics of the first group of PhD program starting 2011 under the wind energy Sino-Danish Centre for Education & Research (SDC) are also......This paper presents an overview on the recent research activities and tendencies regarding grid integration of wind power in Denmark and some related European activities, including power electronics for enhancing wind power controllability, wind turbines and wind farms modeling, wind power...

Carbon Sequestration Leadership Forum - the way forward for CCS

Energy Technology Data Exchange (ETDEWEB)

NONE

2003-09-01

The June 2003 issue of Ecoal briefly outlined events at the inaugural meeting of the Carbon Sequestration Leadership Forum (CSLF) held in Northern Virginia, USA between 23 and 25 June. This featured details on the CSLF Charter, the structure of the Forum, and specific coal industry recommendations to the CSLF. This report provides a more detailed account of issues covered at and arising from the meeting. 2 figs.

An online forum as a qualitative research method: practical issues.

Science.gov (United States)

Im, Eun-Ok; Chee, Wonshik

2006-01-01

Despite the positive aspects of online forums as a qualitative research method, very little is known on the practical issues involved in using online forums for data collection, especially for a qualitative research project. The aim of this study was to describe the practical issues encountered in implementing an online forum as a qualitative component of a larger study on cancer pain experience. Throughout the study process, the research staff recorded issues ranging from minor technical problems to serious ethical dilemmas as they arose and wrote memos about them. The memos and written records of the discussions were reviewed and analyzed using content analysis. Two practical issues related to credibility were identified: (a) a high response and retention rate and (b) automatic transcripts. An issue related to dependability was the participants' forgetfulness. The issues related to confirmability were difficulties in theoretical saturation and unstandardized computer and Internet jargon. A security issue related to hacking attempts was noted as well. The analysis of these issues suggests several implications for future researchers who want to use online forums as a qualitative data collection method.

Reducing Harmonic Instability and Resonance Problems in PMSG Based Wind Farms

DEFF Research Database (Denmark)

Ebrahimzadeh, Esmaeil; Blaabjerg, Frede; Wang, Xiongfei

2018-01-01

Unlike conventional power systems where harmonic resonances are coming from passive inductive and capacitive elements, large-scale power electronic systems like wind farms present a more complex system, where the fast dynamics of the power electronic converters may present an inductive or capacit......Unlike conventional power systems where harmonic resonances are coming from passive inductive and capacitive elements, large-scale power electronic systems like wind farms present a more complex system, where the fast dynamics of the power electronic converters may present an inductive...... or capacitive behavior. Therefore, the interactions between the fast controllers of the power converters and the passive elements may lead to harmonic instability and new resonances at various frequencies. This paper presents an optimum design technique for the Wind Turbine (WT) inner controllers in a PMSG...... based wind farm in order to reduce the number of resonances and to mitigate harmonic instability. In the approach, a PMSG based wind farm is modeled as a Multi-Input Multi-Output (MIMO) dynamic system by modeling the high bandwidth control loops of the power converters. Resonance frequencies...

Forum Engelberg, 1-4 March 2004

CERN Document Server

2004-01-01

The 2004 Forum Engelberg will pay tribute to its President, Hubert Curien, a former President of the CERN Council and former French Minister for Research. The subject of this year's conference, which will take place in Lucerne from 1st to 4th March 2004, is "Science on the Agenda of European Politics." This year, there will be talks by numerous speakers, including the directors of the seven European intergovernmental scientific organisations (EIROforum) and the European Commissioner for Research, Philippe Busquin. The highlights of the conference will include an Interdisciplinary Scientific Programme on 2nd and 3rd March, a session on e-science and the Grid on 4th March and a Young Scientists Programme. The programme and registration forms are available at http://www.forum-engelberg.org/

WIND observations of coherent electrostatic waves in the solar wind

Directory of Open Access Journals (Sweden)

A. Mangeney

Full Text Available The time domain sampler (TDS experiment on WIND measures electric and magnetic wave forms with a sampling rate which reaches 120 000 points per second. We analyse here observations made in the solar wind near the Lagrange point L1. In the range of frequencies above the proton plasma frequency f_pi and smaller than or of the order of the electron plasma frequency f_pe, TDS observed three kinds of electrostatic (e.s. waves: coherent wave packets of Langmuir waves with frequencies f ~ f_pe, coherent wave packets with frequencies in the ion acoustic range f_pi < f < f_pe, and more or less isolated non-sinusoidal spikes lasting less than 1 ms. We confirm that the observed frequency of the low frequency (LF ion acoustic wave packets is dominated by the Doppler effect: the wavelengths are short, 10 to 50 electron Debye lengths λ_D. The electric field in the isolated electrostatic structures (IES and in the LF wave packets is more or less aligned with the solar wind magnetic field. Across the IES, which have a spatial width of the order of ~ 25λ_D, there is a small but finite electric potential drop, implying an average electric field generally directed away from the Sun. The IES wave forms, which have not been previously reported in the solar wind, are similar, although with a smaller amplitude, to the weak double layers observed in the auroral regions, and to the electrostatic solitary waves observed in other regions in the magnetosphere. We have also studied the solar wind conditions which favour the occurrence of the three kinds of waves: all these e.s. waves are observed more or less continuously in the whole solar wind (except in the densest regions where a parasite prevents the TDS observations. The type (wave packet or IES of the observed LF waves is mainly determined

Corporate planning and LAN information systems as forums

CERN Document Server

Sabre, Ru Michael

1992-01-01

Corporate Planning and LAN: Information Systems as Forums provides information pertinent to the Forum Information System (FIS), a conceptual basis for all corporate planning. This book presents an information system which, by means of LAN, organizational development style prototyping, and organizational learning utilization, can open communications among managers, executives, owners, and employees in a corporate setting.Organized into 10 chapters, this book begins with an overview of the four phases to the eventual use of the FIS in a corporate setting. This text then explores FIS as part of a

Build Locally, Link Globally: The Social Forum Process in Italy

Directory of Open Access Journals (Sweden)

Donatella della Porta

2015-08-01

Full Text Available Considered an innovation because of its capacity to develop transnational processes, the World Social Forum however also has strong local roots as well as effects on organizational models and collective identities at the domestic level. Focusing on the Italian case, this article shows how local social forums, as arenas for exchanges of ideas, played a cognitive role in the import, but also the translation of new ideas, as well as helping the emergence of dense network structures and tolerant identities. The first section of the article examines how local social forums contributed to innovation in the organizational formulas of the Global Justice Movement—considering both structure (organizations and process (methodologies aspects—through the development of different, more participatory conceptions of internal decision making. It then addresses the innovations in the definition of collective identities, stressing the linkages of local struggles and global framing as well as the development of a cross-issue discourse around an anti-neoliberal frame. The final section will discuss the contribution of local social forums to contemporary social movements, stressing the role of these new arenas for the cross-fertilization among different movement families and spreading a method of working together that becomes part of the repertoire of action of local social movement organizations. The empirical research consists mainly of in-depth interviews and focus groups with activists from social movement organizations which were involved in local social forums.

Student Outcomes Associated with Use of Asynchronous Online Discussion Forums in Gross Anatomy Teaching

Science.gov (United States)

Green, Rodney A.; Hughes, Diane L.

2013-01-01

Asynchronous online discussion forums are increasingly common in blended learning environments but the relationship to student learning outcomes has not been reported for anatomy teaching. Forums were monitored in two multicampus anatomy courses; an introductory first year course and a second year physiotherapy-specific course. The forums are…

FORUM OF POLITICAL PARTIES, THINK TANKS AND NON-GOVERNMENTAL ORGANIZATIONS OF THE BRICS GROUP

Directory of Open Access Journals (Sweden)

E. Gladun

2017-01-01

Full Text Available The Joint International Forum of Political Parties, Think Tanks and NonGovernmental Organizations of the BRICS took place in Fuzhou, China on 10–12 June 2017. The event was hosted jointly by the International Department of the Central Committee of the Communist Party of China, the China Council for BRICS Think Tank Cooperation and the China NGO Network for International Exchanges.For the first time in the story of BRICS cooperation the countries’ representatives witnessed the renewed format of the BRICS Academic Forum – two traditional tracks (academic conference and civil track were supplemented by the assembly of political parties. Taking its turn in chairing the multinational BRICS association in 2017, China proposed this new Forum format and joined together three dialogues that had grown out of the BRICS Academic Forum, which took place now for the ninth time.1 Another innovation on China’s part was the outreach format – representatives of 28 countries, including Indonesia, Malaysia, the Philippines, Cambodia, Egypt, Nigeria, Ethiopia, Kenya, Argentina, Chile and Mexico among others took part.The Joint International Forum was a truly large-scale international event – 37 political parties of 26 countries, 105 think tanks, and over 400 representatives of 79 civil society organizations were in attendance.2The Forum participants engaged in separate deliberations at the BRICS Academic Forum on “Pooling Wisdom and New Ideas for Cooperation,” the BRICS Civil Society Organizations Forum on “Stronger People-to-People Bond for Better Cooperation,” and the BRICS Political Parties Dialogue on the “Guiding Role of Political Parties in Promoting Cooperation.” The Forum was a complete success with broad consensus.

Wind turbine aerodynamics

Energy Technology Data Exchange (ETDEWEB)

Johnson, D.A. [Waterloo Univ., ON (Canada). Dept. of Mechanical Engineering, Wind Energy Group

2010-07-01

The need for clean, renewable electricity in remote communities of Canada and the world was discussed in this presentation. The University of Waterloo Wind Energy Laboratory (WEL) performs research in a large scale indoor environment on wind turbines, blade aerodynamics, and aeroacoustics. A key area of research involves developing turbines for remote off-grid communities where climatic conditions are challenging. This presentation outlined research that is underway on wind energy and off-grid renewable energy systems. Many communities in Canada and remote communities in the rest of the world are not connected to the grid and are dependent on other means to supply electrical energy to their community. Remote communities in northern Canada have no road access and diesel is the dominant source of electrical energy for these communities. All of the community supply of diesel comes from brief winter road access or by air. The presentation discussed existing diesel systems and the solution of developing local renewable energy sources such as wind, hydro, biomass, geothermal, and solar power. Research goals, wind energy activities, experimental equipment, and the results were also presented. Research projects have been developed in wind energy; hydrogen generation/storage/utilization; power electronics/microgrid; and community engagement. figs.

Human resources challenges for wind energy

Energy Technology Data Exchange (ETDEWEB)

Cottingham, C. [Electricity Sector Council, Ottawa, ON (Canada)

2006-07-01

The potential role of the Electricity Sector Council in wind power workforce development was reviewed. Canada is a major exporter of electricity, and production of electricity in the country has grown by 10 per cent in the last 10 years. The electric industry has become increasingly interested in the development of renewable and sustainable energy sources in order to reduce the environmental impacts of electricity production and use, as well to address potential supply shortages. However, total labour force growth in Canada is expected to drop to 0.5 per cent by 2010, and is expected to keep falling. Engineering and science enrolments in post-secondary institutions are declining. Many immigrants to Canada choose to settle in metropolitan areas, and only 4 in 10 immigrants are able to achieve validation of their credentials in the Canadian education system. One-third of Canadian employees are expected to retire in the next 8 years. The wind energy sector is the fastest growing energy source sector in Canada, and there are limited training facilities available. Competency profiles for roles in the industry are not clearly defined. Many provinces have very little development to support or sustain educational services for wind power training. This presentation suggested that the wind energy sector should prepare for the anticipated workforce shortage by planning training programs and building partnerships in workforce development. Investments in wind power research and development should have contract provisions regarding labour and skills development. Retiring electricity workers may provide a source of labour support. Sector councils provide a neutral forum for employers, educators, and employees, with a focus on human resource development for specific industry sectors. The councils represent an estimated 45 to 50 per cent of the labour market, and have significant federal funding. The Electricity Sector Council offers advanced career and workforce training; youth

Laboratory development of wind turbine simulator using variable ...

African Journals Online (AJOL)

user

1*Department of Electronics Engineering, Prof. ... In this paper variable speed induction motor drive using scalar control is interfaced in wind energy conversion ... the wind turbine simulator is used as a necessary tool in research laboratories.

Wind Velocity and Position Sensor-less Operation for PMSG Wind Generator

Science.gov (United States)

Senjyu, Tomonobu; Tamaki, Satoshi; Urasaki, Naomitsu; Uezato, Katsumi; Funabashi, Toshihisa; Fujita, Hideki

Electric power generation using non-conventional sources is receiving considerable attention throughout the world. Wind energy is one of the available non-conventional energy sources. Electrical power generation using wind energy is possible in two ways, viz. constant speed operation and variable speed operation using power electronic converters. Variable speed power generation is attractive, because maximum electric power can be generated at all wind velocities. However, this system requires a rotor speed sensor, for vector control purpose, which increases the cost of the system. To alleviate the need of rotor speed sensor in vector control, we propose a new sensor-less control of PMSG (Permanent Magnet Synchronous Generator) based on the flux linkage. We can estimate the rotor position using the estimated flux linkage. We use a first-order lag compensator to obtain the flux linkage. Furthermore‚we estimate wind velocity and rotation speed using a observer. The effectiveness of the proposed method is demonstrated thorough simulation results.

Low-level Waste Forum meeting report. Fall meeting, October 20--22, 1993

International Nuclear Information System (INIS)

1993-01-01

The Low-Level Radioactive Waste Forum is an association of representatives of states and compacts established to facilitate state and compact commission implementation of the Low-Level Radioactive Waste Policy Act of 1980 and the Low-Level Radioactive Waste Policy Amendments Act of 1985 and to promote the objectives of low-level radioactive waste regional compacts. The Forum provides an opportunity for states and compacts to share information with one another and to exchange views with officials of federal agencies. The Forum participants include representatives from regional compacts, designated host states, unaffiliated states, and states with currently-operating low-level radioactive waste facilities. This report contains information synthesizing the accomplishments of the Forum, as well as any new advances that have been made in the management of low-level radioactive wastes

Low-level Waste Forum meeting report. Spring meeting, April 28--30, 1993

International Nuclear Information System (INIS)

1993-01-01

The Low-Level Radioactive Waste Forum is an association of representatives of states and compacts established to facilitate state and compact commission implementation of the Low-Level Radioactive Waste Policy Act of 1980 and the Low-Level Radioactive Waste Policy Amendments Act of 1985 and to promote the objectives of low-level radioactive waste regional compacts. The Forum provides an opportunity for states and compacts to share information with one another and to exchange views with officials of federal agencies. The Forum participants include representatives from regional compacts, designated host states, unaffiliated states, and states with currently-operating low-level radioactive waste facilities. This report contains information synthesizing the accomplishments of the Forum, as well as any new advances that have been made in the management of low-level radioactive wastes

Low-Level Waste Forum meeting report. Quarterly meeting, July 23--24, 1990

Energy Technology Data Exchange (ETDEWEB)

NONE

1990-12-31

The Low-Level Radioactive Waste Forum is an association of representatives of states and compacts established to facilitate state and compact commission implementation of the Low-Level Radioactive Waste Policy Act of 1980 and the Low-Level Radioactive Waste Policy Amendments Act of 1985 and to promote the objectives of low-level radioactive waste regional compacts. The Forum provides an opportunity for states and compacts to share information with one another and to exchange views with officials of federal agencies. The Forum participants include representatives from regional compacts, designated host states, unaffiliated states, and states with currently-operating low-level radioactive waste facilities. This report contains information synthesizing the accomplishments of the Forum, as well as any new advances that have been made in the management of low-level radioactive wastes.

Low-level Waste Forum meeting report. Winter meeting, January 26--28, 1994

International Nuclear Information System (INIS)

1994-01-01

The Low-Level Radioactive Waste Forum is an association of representatives of states and compacts established to facilitate state and compact commission implementation of the Low-Level Radioactive Waste Policy Act of 1980 and the Low-Level Radioactive Waste Policy Amendments Act of 1985 and to promote the objectives of low-level radioactive waste regional compacts. The Forum provides an opportunity for states and compacts to share information with one another and to exchange views with officials of federal agencies. The Forum participants include representatives from regional compacts, designated host states, unaffiliated states, and states with currently-operating low-level radioactive waste facilities. This report contains information synthesizing the accomplishments of the Forum, as well as any new advances that have been made in the management of low-level radioactive wastes

Low-level Waste Forum meeting report. Summer meeting, July 21--23, 1993

International Nuclear Information System (INIS)

1993-01-01

The Low-Level Radioactive Waste Forum is an association of representatives of states and compacts established to facilitate state and compact commission implementation of the Low-Level Radioactive Waste Policy Act of 1980 and the Low-Level Radioactive Waste Policy Amendments Act of 1985 and to promote the objectives of low-level radioactive waste regional compacts. The Forum provides an opportunity for states and compacts to share information with one another and to exchange views with officials of federal agencies. The Forum participants include representatives from regional compacts, designated host states, unaffiliated states, and states with currently-operating low-level radioactive waste facilities. This report contains information synthesizing the accomplishments of the Forum, as well as any new advances that have been made in the management of low-level radioactive wastes

Low-level Waste Forum meeting report. Winter meeting, January 26--28, 1994

Energy Technology Data Exchange (ETDEWEB)

NONE

1994-12-31

The Low-Level Radioactive Waste Forum is an association of representatives of states and compacts established to facilitate state and compact commission implementation of the Low-Level Radioactive Waste Policy Act of 1980 and the Low-Level Radioactive Waste Policy Amendments Act of 1985 and to promote the objectives of low-level radioactive waste regional compacts. The Forum provides an opportunity for states and compacts to share information with one another and to exchange views with officials of federal agencies. The Forum participants include representatives from regional compacts, designated host states, unaffiliated states, and states with currently-operating low-level radioactive waste facilities. This report contains information synthesizing the accomplishments of the Forum, as well as any new advances that have been made in the management of low-level radioactive wastes.

Low-level Waste Forum meeting report. Quarterly meeting, July 25--26, 1991

International Nuclear Information System (INIS)

1991-01-01

The Low-Level Radioactive Waste Forum is an association of representatives of states and compacts established to facilitate state and compact commission implementation of the Low-Level Radioactive Waste Policy Act of 1980 and the Low-Level Radioactive Waste Policy Amendments Act of 1985 and to promote the objectives of low-level radioactive waste regional compacts. The Forum provides an opportunity for states and compacts to share information with one another and to exchange views with officials of federal agencies. The Forum participants include representatives from regional compacts, designated host states, unaffiliated states, and states with currently-operating low-level radioactive waste facilities. This report contains information synthesizing the accomplishments of the Forum, as well as any new advances that have been made in the management of low-level radioactive wastes

Lifetime estimation for the power semiconductors considering mission profiles in wind power converter

OpenAIRE

Ma, Ke; Liserre, Marco; Blaabjerg, Frede

2013-01-01

As a key component in the wind turbine system, power electronic converter and its power semiconductors suffer from adverse power loadings related to environment, and are proven to have certain failure rates. Therefore, correct lifetime estimation of wind power converter is crucial for the reliability improvement and also for cost reduction of wind power technology. Unfortunately, the existing lifetime estimation methods for the power electronic converter are not yet suitable in the wind power...

Using Conditional Random Fields to Extract Contexts and Answers of Questions from Online Forums

DEFF Research Database (Denmark)

Ding, Shilin; Cong, Gao; Lin, Chin-Yew

2008-01-01

Online forum discussions often contain vast amounts of questions that are the focuses of discussions. Extracting contexts and answers together with the questions will yield not only a coherent forum summary but also a valuable QA knowledge base. In this paper, we propose a general framework based...... on Conditional Random Fields (CRFs) to detect the contexts and answers of questions from forum threads. We improve the basic framework by Skip-chain CRFs and 2D CRFs to better accommodate the features of forums for better performance. Experimental results show that our techniques are very promising....

The UK shielding Forum. Best Practice through consensus

International Nuclear Information System (INIS)

Hobson, J.; Gunston, K.; Gunston, K.

2000-01-01

The UK national shielding Forum has been established to represent all key industry groups in the UK (including the Nuclear Installations Inspectorate (NII), the national regulatory authority). The Forum's aim is to increase awareness and confidence in the range of professional practice within the UK shielding community, with a view to having a coherent and dynamic role within the international shielding community. In the past, no comprehensive representative body covering the whole UK nuclear industry has existed, and the different industry shielding groups have developed local ways of working to address their particular requirements. Inevitably, there are common issues arising from these requirements which benefit from a wider consensus. As a result of the formation of the Forum (initiated by the NII and subsequently chaired by BNFL as an industry key player), expertise, experience and best working practice are now being actively shared between shielding professionals, and there has been a strong and successful drive to achieving consensus on key issues, which is also reflected in the increasing quality of industry-regulator relationships. (author)

Rapport fra 2nd Supply Chain Leaders Forum 2013

DEFF Research Database (Denmark)

Knak, Henrik; Hald, Kim Sundtoft

2013-01-01

Dette års udgave af Supply Chain Leaders Forum diskede op med innovation, inspiration og ny indsigt i outsourcing. Konferencen var arrangeret i et samarbejde mellem Copenhagen Business School og Tata Consultancy Services. (Artiklen er på engelsk).......Dette års udgave af Supply Chain Leaders Forum diskede op med innovation, inspiration og ny indsigt i outsourcing. Konferencen var arrangeret i et samarbejde mellem Copenhagen Business School og Tata Consultancy Services. (Artiklen er på engelsk)....

Discovering Central Practitioners in a Medical Discussion Forum Using Semantic Web Analytics.

Science.gov (United States)

Rajabi, Enayat; Abidi, Syed Sibte Raza

2017-01-01

The aim of this paper is to investigate semantic web based methods to enrich and transform a medical discussion forum in order to perform semantics-driven social network analysis. We use the centrality measures as well as semantic similarity metrics to identify the most influential practitioners within a discussion forum. The centrality results of our approach are in line with centrality measures produced by traditional SNA methods, thus validating the applicability of semantic web based methods for SNA, particularly for analyzing social networks for specialized discussion forums.

Building on strengths: Canada's energy policy framework. Insights from the Canadian Energy Forums

International Nuclear Information System (INIS)

Schmidt, G.

2011-01-01

This paper discusses Canada's energy policy and insights from the Canadian Energy Forums. The Energy Council of Canada held a series of Canadian Energy Forums leading up to Canada hosting the World Energy Congress Montreal 2010 in September. The Cross-Canada Forums focused upon specific regions of Canada and obtained from governments, industry and other stake holders, perspectives and planned policy actions to address present and future energy challenges.

Nordic Nuclear Materials Forum for Generation IV Reactors

Energy Technology Data Exchange (ETDEWEB)

Anghel, C. (Studsvik Nuclear AB, Nykoeping (Sweden)); Penttilae, S. (Technical Research Centre of Finland, VTT (Finland))

2010-03-15

A network for material issues for Generation IV nuclear power has been initiated within the Nordic countries. The objectives of the Generation IV Nordic Nuclear Materials Forum (NOMAGE4) are to put the basis of a sustainable forum for Gen IV issues, especially focussing on fuels, cladding, structural materials and coolant interaction. Other issues include reactor physics, dynamics and diagnostics, core and fuel design. The present report summarizes the work performed during the year 2009. The efforts made include identification of organisations involved in Gen IV issues in the Nordic countries, update of the forum website, http://www.studsvik.se/GenerationIV, and investigation of capabilities for research within the area of Gen IV. Within the NOMAGE4 project a seminar on Generation IV Nuclear Energy Systems has been organized during 15-16th of October 2009. The aim of the seminar was to provide a forum for exchange of information, discussion on future research needs and networking of experts on Generation IV reactor concepts. As an outcome of the NOMAGE4, a few collaboration project proposals have been prepared/planned in 2009. The network was welcomed by the European Commission and was mentioned as an exemplary network with representatives from industries, universities, power companies and research institutes. NOMAGE4 has been invited to participate to the 'European Energy Research Alliance, EERA, workshop for nuclear structural materials' http://www.eera-set.eu/index.php?index=41 as external observers. Future plans include a new Nordic application for continuation of NOMAGE4 network. (author)

Nordic Nuclear Materials Forum for Generation IV Reactors

International Nuclear Information System (INIS)

Anghel, C.; Penttilae, S.

2010-03-01

A network for material issues for Generation IV nuclear power has been initiated within the Nordic countries. The objectives of the Generation IV Nordic Nuclear Materials Forum (NOMAGE4) are to put the basis of a sustainable forum for Gen IV issues, especially focussing on fuels, cladding, structural materials and coolant interaction. Other issues include reactor physics, dynamics and diagnostics, core and fuel design. The present report summarizes the work performed during the year 2009. The efforts made include identification of organisations involved in Gen IV issues in the Nordic countries, update of the forum website, http://www.studsvik.se/GenerationIV, and investigation of capabilities for research within the area of Gen IV. Within the NOMAGE4 project a seminar on Generation IV Nuclear Energy Systems has been organized during 15-16th of October 2009. The aim of the seminar was to provide a forum for exchange of information, discussion on future research needs and networking of experts on Generation IV reactor concepts. As an outcome of the NOMAGE4, a few collaboration project proposals have been prepared/planned in 2009. The network was welcomed by the European Commission and was mentioned as an exemplary network with representatives from industries, universities, power companies and research institutes. NOMAGE4 has been invited to participate to the 'European Energy Research Alliance, EERA, workshop for nuclear structural materials' http://www.eera-set.eu/index.php?index=41 as external observers. Future plans include a new Nordic application for continuation of NOMAGE4 network. (author)

Asian & Pacific Islander American Health Forum

Science.gov (United States)

... Report.pdf [1.2MB] Obesity and Overweight Among Asian American Children and Adolescents 2016.04.28-OBESITY AND ... Month Stay Connected! Receive the latest APIAHF updates Asian & Pacific Islander American Health Forum. All rights reserved. One Kaiser Plaza, ...

PREFACE: IV Nanotechnology International Forum (RUSNANOTECH 2011)

Science.gov (United States)

Dvurechenskii, Anatoly; Alfimov, Mikhail; Suzdalev, Igor; Osiko, Vyacheslav; Khokhlov, Aleksey; Son, Eduard; Skryabin, Konstantin; Petrov, Rem; Deev, Sergey

2012-02-01

Logo The RUSNANOTECH 2011 International Forum on Nanotechnology was held from 26-28 October 2011, in Moscow, Russia. It was the fourth forum organized by RUSNANO (Russian Corporation of Nanotechnologies) since 2008. In March 2011 RUSNANO was established as an open joint-stock company through the reorganization of the state corporation Russian Corporation of Nanotechnologies. RUSNANO's mission is to develop the Russian nanotechnology industry through co-investment in nanotechnology projects with substantial economic potential or social benefit. Within the framework of the Forum Science and Technology Program, presentations on key trends of nanotechnology development were given by foreign and Russian scientists, R&D officers of leading international companies, universities and scientific centers. The science and technology program of the Forum was divided into four sections as follows (by following hyperlinks you may find each section's program including videos of all oral presentations): Nanoelectronics and Nanophotonics Nanomaterials Nanotechnology and Green Energy Nanotechnology in Healthcare and Pharma (United business and science & technology section on 'RUSNANOTECH 2011') The scientific program of the forum included more than 50 oral presentations by leading scientists from 15 countries. Among them were world-known specialists such as Professor S Bader (Argonne National Laboratory, USA), Professor O Farokzhad (Harvard Medical School, USA), Professor K Chien (Massachusetts General Hospital, USA), Professor L Liz-Marzan (University of Vigo), A Luque (Polytechnic University of Madrid) and many others. The poster session consisted of over 120 presentations, 90 of which were presented in the framework of the young scientists' nanotechnology papers competition. This volume of Journal of Physics: Conference Series includes a selection of 47 submissions. Section editors of the proceedings: Nanoelectronics and nanophotonics Corresponding Member of Russian Academy of

Financial Denartments Should Quicken Steps of Electronization

Institute of Scientific and Technical Information of China (English)

无

2004-01-01

　　At 2004 China Electronic Finance Forum held in Beijing recently,Pan Xinping, Dean of Software Institute of Graduate Institute of Chinese Academy of Science appealled that China's financial departments should further quicken electronization and establish complete network electronic payment system to offer comprehensive financial service such as checking card, transference and clearance between banks, electronic securities, accounting management,transaction disposal, payment commission and service of report, and establish financial management information system. And it should finish communications between computer systems of all different professional banks, providing strong backing for the development of electronic finance in China.……

Financial Denartments Should Quicken Steps of Electronization

Institute of Scientific and Technical Information of China (English)

无

2004-01-01

@@ At 2004 China Electronic Finance Forum held in Beijing recently,Pan Xinping, Dean of Software Institute of Graduate Institute of Chinese Academy of Science appealled that China's financial departments should further quicken electronization and establish complete network electronic payment system to offer comprehensive financial service such as checking card, transference and clearance between banks, electronic securities, accounting management,transaction disposal, payment commission and service of report, and establish financial management information system. And it should finish communications between computer systems of all different professional banks, providing strong backing for the development of electronic finance in China.

The Decision-Makers' Forum on a new paradigm for nuclear energy. Final Report

International Nuclear Information System (INIS)

Motloch, C.G.

1998-01-01

The Decision-Makers' Forum on a New Paradigm for Nuclear Energy was created in response to the challenge by Sen. Pete V. Domenici to begin, ''a new dialogue with serious discussion about the full range of nuclear technologies.'' Sponsored by the Senate Nuclear Issues Caucus, the Forum was organized and facilitated by the Idaho National Engineering and Environmental Laboratory. The participants were decision-makers and key staff from industry, government, the national laboratories, academia and professional societies. Overall, the Forum was designed to capture the ideas of a large number of decision-makers about the high priority actions recommended to help set a new national agenda for nuclear energy. The Forum recommended 10 priority actions toward this end

Short-Circuit Current Analysis for DFIG Wind Farm Considering the Action of a Crowbar

OpenAIRE

Yan Hong Yuan; Feng Wu

2018-01-01

With the increasing capacity of wind farms integrated into the power grid, the short-circuit current analysis for wind farms becomes more and more important. Since the wind turbine is usually integrated into the power grid via power electronic devices, the “crowbar” is installed in the wind turbine to protect the power electronic devices and to improve the fault ride through capability. The impact of the crowbar has to be considered during the short-circuit current analysis for the wind farm....

Low-level waste forum meeting reports

International Nuclear Information System (INIS)

1991-01-01

This report contains highlights from the 1991 fall meeting of the Low Level Radioactive Waste Forum. Topics included legal updates; US NRC updates; US EPA updates; mixed waste issues; financial assistance for waste disposal facilities; and a legislative and policy report

The 1995 forum on appropriate criteria and methods for seismic design of nuclear piping

International Nuclear Information System (INIS)

Slagis, G.C.

1996-01-01

A record of the 1995 Forum on Appropriate Criteria and Methods for Seismic Design of Nuclear Piping is provided. The focus of the forum was the earthquake experience data base and whether the data base demonstrates that seismic inertia loads will not cause failure in ductile piping systems. This was a follow-up to the 1994 Forum when the use of earthquake experience data, including the recent Northridge earthquake, to justify a design-by-rule method was explored. Two possible topics for the next forum were identified--inspection after an earthquake and design for safe-shutdown earthquake only

Adaptation in Global Climate Governance : Linkages between Intergovernmental Dialoge Forums and the UNFCCC regarding Adaptation

NARCIS (Netherlands)

de Voogt, D.L.

This paper investigates how intergovernmental dialogue forums addressing climate change outside of the UNFCCC are linked with the UNFCCC regarding their statements on adaptation. The discussed forums are the Major Economies Forum, G8, and G20. Three analytical points of comparison concerning the

Proceedings of a forum industry-university relations: collision or cooperation

Energy Technology Data Exchange (ETDEWEB)

1982-06-01

The principal objective of the Forum was to gather individuals intimately involved or concerned with the national status of industry-university relations in order to develop a state-of-the-art consensus on the issues, problems and forms of these relationships. The program and schedule of the Forum are included in Appendix A. The agenda approached the Forum objective by scheduling an initial day of discussions on selected issues (Communication Barriers, Ethical Considerations, Bypassing the System, and Industrial Security and Restraint of Trade). This was followed by a morning session devoted to an examination of existing models representing the major alternative mechanisms currently utilized in formalized university-industry interactions. Each session was initiated by a general review statement presented by an appropriate Topic Leader. The Topic Leaders are listed in Appendix B.

FlagHouse Forum: You Say "Tomato"... and I Use a Communicator

Science.gov (United States)

Exceptional Parent, 2011

2011-01-01

This month's "FlagHouse Forum" focuses on how to choose the communicator best-suited to a child's special need. FlagHouse--a premier global supplier of resources for special needs, education, physical activity and recreation--is pleased to partner with "Exceptional Parent" to bring its readers this informational forum. Humans communicate with each…

IAEA scientific forum 2005. Nuclear science: Physics helping the world. Presentations

International Nuclear Information System (INIS)

2005-01-01

The Scientific forum held during the 49th Regular Session of the IAEA General Conference covered the following topics: meeting energy needs, developing advanced materials and technologies, advancing radiation medicine and supporting nuclear safety. This publication contains 23 individual papers presented at the scientific forum. Each of the papers was indexed separately

Forum on Flexible Education. Reaching Nomadic Populations in Africa. Summary Report

Science.gov (United States)

de Souza, Alba

2007-01-01

This report describes the Forum on Flexible Education: Reaching Nomadic Populations in Africa, which was held in Garissa, Kenya, from 20-23 June 2006. The objectives of the Forum were to share experiences and best practices, create linkages and encourage collaboration in order to make education more accessible to nomadic communities.…

Proceedings of the 2008 transportation technologies and fuels forum

International Nuclear Information System (INIS)

2008-01-01

As a large emitter of pollutants, the transportation industry is now seeking to develop a sustainable transportation plan for the future by developing methods of reducing emissions and improving the fuel efficiency of vehicles. This forum discussed recent innovations in vehicle transportation technologies. Industry leaders, government representatives, and researchers discussed methods of reducing greenhouse gases (GHGs) and air pollution in the transportation sector. Advanced combustion technologies were outlined, and recent developments in hybrid electric-powered vehicles were discussed. Research related to fuel cells, hydrogen fuels and biofuels was presented. The impacts of polluting vehicles on public health were also discussed. The forum was divided into the following 5 sessions: (1) setting the scene, (2) future fuels, (3) emissions, (4) EVs now, and (5) the road to the future. The sessions were followed by a panel on technology roadmaps. The forum featured 14 presentations, of which 4 have been catalogued separately for inclusion in this database. tabs., figs.

Members of the Forum Engelberg visit CERN

CERN Multimedia

Patrice Loïez

2002-01-01

The Forum Engelberg is an annual interdisciplinary conference held in Engelberg, Switzerland intended to act as an international platform for debate and exchange of views on key issues affecting scientific research, technology, economics and philosophy. Its President is Hubert Curien - former French Minister of Research and Space Research, and President of the CERN Council from 1994 to 1996. He is pictured here (centre) with (left to right) Raymond Battistella, Director-General of SIG, Geneva's utilities provider; Michel Della Negra; Marie-Anne Heimo; Jean-Claude Landry; and Bernard Ecoffey, Founder of the Forum Engelberg, in front of the CMS detector under construction. Visible are three of the five concentric rings forming the barrel yoke which returns the magnetic flux generated by the superconducting coil.

Power Electronic Systems for Switched Reluctance Generator based Wind Farms and DC Networks

DEFF Research Database (Denmark)

Park, Kiwoo

enable various renewable energy sources, such as Photovoltaic (PV) and wind, to produce dc power directly. In addition, battery-based energy storage systems inherently operate with dc power. Hence, dc network (dc-grid) systems which connect these dc sources and storages directly using dc networks...... are gaining much attention again. The dc network system has a great potential to outdo the traditional ac systems in many technical challenges and could be highly profitable especially for offshore wind farm applications, where the size and weight of the components are crucial to the entire system costs......Wind power technology, as the most competitive renewable energy technology, is quickly developing. The wind turbine size is growing and the grid penetration of wind power is increasing rapidly. Recently, the developments on wind power technology pay more attentions on efficiency and reliability...

11. Rostock bioenergy forum. Proceedings

International Nuclear Information System (INIS)

Nelles, Michael

2017-01-01

The seven main focus of the bioenergy forum were: 1. Political regulation and its consequences; 2. Flexible energy supply; 3. Biorefineries for the use of residues from bioenergy production; 4. Process optimization biogas; 5. Alternative substrates for biogas production; 6. Cross-sectoral bioenergy concept; 7. Transport sector (biofuels). Five lectures are separately analyzed for this database. [de

The environment of the wind-wind collision region of η Carinae

Science.gov (United States)

Panagiotou, C.; Walter, R.

2018-02-01

Context. η Carinae is a colliding wind binary hosting two of the most massive stars and featuring the strongest wind collision mechanical luminosity. The wind collision region of this system is detected in X-rays and γ-rays and offers a unique laboratory for the study of particle acceleration and wind magneto-hydrodynamics. Aim. Our main goal is to use X-ray observations of η Carinae around periastron to constrain the wind collision zone geometry and understand the reasons for its variability. Methods: We analysed 10 Nuclear Spectroscopic Telescope Array (NuSTAR) observations, which were obtained around the 2014 periastron. The NuSTAR array monitored the source from 3 to 30 keV, which allowed us to grasp the continuum and absorption parameters with very good accuracy. We were able to identify several physical components and probe their variability. Results: The X-ray flux varied in a similar way as observed during previous periastrons and largely as expected if generated in the wind collision region. The flux detected within 10 days of periastron is lower than expected, suggesting a partial disruption of the central region of the wind collision zone. The Fe Kα line is likely broadened by the electrons heated along the complex shock fronts. The variability of its equivalent width indicates that the fluorescence region has a complex geometry and that the source obscuration varies quickly with the line of sight.

Lifetime estimation for the power semiconductors considering mission profiles in wind power converter

DEFF Research Database (Denmark)

Ma, Ke; Liserre, Marco; Blaabjerg, Frede

2013-01-01

for the reliability improvement and also for cost reduction of wind power technology. Unfortunately, the existing lifetime estimation methods for the power electronic converter are not yet suitable in the wind power application, because the comprehensive mission profiles are not well specified and included......As a key component in the wind turbine system, power electronic converter and its power semiconductors suffer from adverse power loadings related to environment, and are proven to have certain failure rates. Therefore, correct lifetime estimation of wind power converter is crucial...... estimation, more detailed information for the reliability performance of wind power converter can be obtained....

Solar wind plasma structure near a 'HELIOS-Perihelion'

International Nuclear Information System (INIS)

Kikuchi, H.

1979-01-01

The purpose of this paper is to introduce a couple of preliminary but important results obtained from HELIOS observation concerning solar wind plasma structure near a ''HELIOS-Perihelion'' among the data analyses in progress, partly in relation to laboratory plasma. Idealized profiles of the bulk velocity, density and temperature of solar wind near 0.3 AU as deduced from HELIOS A data and correlated K-coronal contours were obtained. During 1974 - 1976, the sun was in the period of declining cycle, and the coronal holes expanded to lower latitudes from northern and southern holes. There is general tendency that the northern coronal hole is somewhat larger than the southern coronal hole. In regards to solar wind velocity, there are two fast stream regions with velocity as high as 800 Km/sec. An electron spectrum measured near a HELIOS-Perihelion (0.3 AU) approximately in the solar direction is shown. Three regions can be distinguished in velocity distribution. The density contours of solar wind electrons in velocity space exhibit a narrow beam of electrons in the magnetic field direction close to the plane of observation. (Kato, T.)

Empirical model for the electron density peak height disturbance in response to solar wind conditions

Science.gov (United States)

Blanch, E.; Altadill, D.

2009-04-01

Geomagnetic storms disturb the quiet behaviour of the ionosphere, its electron density and the electron density peak height, hmF2. Many works have been done to predict the variations of the electron density but few efforts have been dedicated to predict the variations the hmF2 under disturbed helio-geomagnetic conditions. We present the results of the analyses of the F2 layer peak height disturbances occurred during intense geomagnetic storms for one solar cycle. The results systematically show a significant peak height increase about 2 hours after the beginning of the main phase of the geomagnetic storm, independently of both the local time position of the station at the onset of the storm and the intensity of the storm. An additional uplift is observed in the post sunset sector. The duration of the uplift and the height increase are dependent of the intensity of the geomagnetic storm, the season and the local time position of the station at the onset of the storm. An empirical model has been developed to predict the electron density peak height disturbances in response to solar wind conditions and local time which can be used for nowcasting and forecasting the hmF2 disturbances for the middle latitude ionosphere. This being an important output for EURIPOS project operational purposes.

A Proposed Model for Authenticating Knowledge Transfer in Online Discussion Forums

Science.gov (United States)

Tucker, Jan P.; YoungGonzaga, Stephanie; Krause, Jaclyn

2014-01-01

Discussion forums are often utilized in the online classroom to build a sense of community, encourage collaboration and exchange, and measure time on task. A review of the literature revealed that there is little research that examines the role of the online discussion forum as a mechanism for knowledge transfer. Researchers reviewed 21 course…

Is It Safe to Vape? Analyzing Online Forums Discussing E-Cigarette Use during Pregnancy.

Science.gov (United States)

Wigginton, Britta; Gartner, Coral; Rowlands, Ingrid J

Electronic cigarette (e-cigarette) use, or vaping, is increasing against a backdrop of declining smoking rates. E-cigarettes contain fewer toxicants than cigarettes, but their appearance and mode of use has the potential to satisfy the habitual aspects of smoking. To date, we know little about lay perceptions of the safety of using e-cigarettes in pregnancy. We conducted a thematic discourse analysis of 13 online discussion forum threads that discussed e-cigarette use during pregnancy. We focused on the major discursive strategies that forum posters used to debate the safety of e-cigarette use during pregnancy. We identified three distinct ways in which forum posters debated the safety of using e-cigarettes during pregnancy: 1) quitting (nicotine) cold turkey is unsafe, 2) vaping is the lesser of two evils, and 3) vaping is not worth the risk. Discussions about the safety of e-cigarettes drew on the premise that 1) immediate cessation of nicotine was potentially harmful and unsafe, 2) e-cigarettes were a harm reduction tool, or 3) vaping could be dangerous and should be avoided. Although these arguments are not necessarily specific to pregnancy (beside mentions of fetal-specific risks), this analysis points to the need to educate and support women about harm reduction options. Health professionals should be aware that some women may be currently using or considering using e-cigarettes in an effort to quit or reduce smoking. It is important that health professionals are equipped to educate women with accurate, up-to-date, and balanced information about the risks and benefits of e-cigarette use during pregnancy. Copyright © 2016 Jacobs Institute of Women's Health. Published by Elsevier Inc. All rights reserved.

76 FR 62373 - Notice of Public Meeting-Cloud Computing Forum & Workshop IV

Science.gov (United States)

2011-10-07

...--Cloud Computing Forum & Workshop IV AGENCY: National Institute of Standards and Technology (NIST), Commerce. ACTION: Notice. SUMMARY: NIST announces the Cloud Computing Forum & Workshop IV to be held on... to help develop open standards in interoperability, portability and security in cloud computing. This...

Digital Discourse Markers in an ESL Learning Setting: The Case of Socialisation Forums

Directory of Open Access Journals (Sweden)

Alireza Shakarami

2016-08-01

Full Text Available Analysis of the linguistic discourse plays an important role in the social, cultural, ethnographic, and comparative studies of languages. Discourse markers as indispensable parts of this analysis are reportedly more common in informal speech than in written language. They could be used at different levels, i.e. as „linking words‟, „linking phrases‟, or „sentence connectors‟ to bind together pieces of a text like „glue‟. The objective of the study is to ascertain the discourse markers employed in synchronous online interactions and networking through constant comparison of discourse markers used in the discussion forums (DF with the discourse markers already reported in the literature. The study maintains discourse markers (DMs used in the formal written discourse in order to identify any probable pragmatic, or discoursal level differences in the DMs used in the two modes of writing (formal writing and typing in online communication. The findings indicate that the written language that students use in their electronic posts is to a great extent similar to that of the process view of writing. Specifically, the written language used in a digital socialisation forum is at times, monitored, reviewed, revised, and corrected by the students themselves and their peers.

Balkan Print Forum – Dynamic Balkan Print Media Community

Directory of Open Access Journals (Sweden)

Rossitza Velkova

2011-11-01

Full Text Available Founded in October 2006, the Balkan Print Forum is gradually becoming an important regional institution. Its main targets are to share experiences and know-how,to initiate and intensify contacts and to support joint projects in the Balkan region.Since drupa 2008 there are 11 member countries of the Balkan Print Forum:Albania, Bosnia and Herzegovina, Bulgaria, Croatia, Former Yugoslav Republic of Macedonia, Greece, Hungary, Romania, Serbia, Slovenia and Turkey. Partners of BPF are some companies and universities from Russia and Ukraine.

Use of Online Forums for Perinatal Mental Illness, Stigma, and Disclosure: An Exploratory Model.

Science.gov (United States)

Moore, Donna; Drey, Nicholas; Ayers, Susan

2017-02-20

Perinatal mental illness is a global health concern; however, many women with the illness do not get the treatment they need to recover. Interventions that reduce the stigma around perinatal mental illness have the potential to enable women to disclose their symptoms to health care providers and consequently access treatment. There are many online forums for perinatal mental illness and thousands of women use them. Preliminary research suggests that online forums may promote help-seeking behavior, potentially because they have a role in challenging stigma. This study draws from these findings and theoretical concepts to present a model of forum use, stigma, and disclosure. This study tested a model that measured the mediating role of stigma between online forum use and disclosure of affective symptoms to health care providers. A Web-based survey of 200 women who were pregnant or had a child younger than 5 years and considered themselves to be experiencing psychological distress was conducted. Women were recruited through social media and questions measured forum usage, perinatal mental illness stigma, disclosure to health care providers, depression and anxiety symptoms, barriers to disclosure, and demographic information. There was a significant positive indirect effect of length of forum use on disclosure of symptoms through internal stigma, b=0.40, bias-corrected and accelerated (BCa) 95% CI 0.13-0.85. Long-term forum users reported higher levels of internal stigma, and higher internal stigma was associated with disclosure of symptoms to health care providers when controlling for symptoms of depression and anxiety. Internal stigma mediates the relationship between length of forum use and disclosure to health care providers. Findings suggest that forums have the potential to enable women to recognize and reveal their internal stigma, which may in turn lead to greater disclosure of symptoms to health care providers. Clinicians could refer clients to trustworthy and

Authorship Analysis on Dark Marketplace Forums

NARCIS (Netherlands)

Spitters, M.; Klaver, F.; Koot, G.; Staalduinen, M.V.

2015-01-01

Anonymity networks like Tor harbor many underground markets and discussion forums dedicated to the trade of illegal goods and services. As they are gaining in popularity, the analysis of their content and users is becoming increasingly urgent for many different parties, ranging from law enforcement

Facilitating Learning Spaces in Forum Theatre

Science.gov (United States)

Rae, Jan

2013-01-01

Purpose: The purpose of this paper is to evaluate the extent to which forum theatre interventions can support non-hierarchical approaches to learning, development and change management initiatives in organisations. Design/methodology/approach: Semi-structured interviews were carried out with theatre consultancies, actors/facilitators,…

A Distributed Lag Autoregressive Model of Geostationary Relativistic Electron Fluxes: Comparing the Influences of Waves, Seed and Source Electrons, and Solar Wind Inputs

Science.gov (United States)

Simms, Laura; Engebretson, Mark; Clilverd, Mark; Rodger, Craig; Lessard, Marc; Gjerloev, Jesper; Reeves, Geoffrey

2018-05-01

Relativistic electron flux at geosynchronous orbit depends on enhancement and loss processes driven by ultralow frequency (ULF) Pc5, chorus, and electromagnetic ion cyclotron (EMIC) waves, seed electron flux, magnetosphere compression, the "Dst effect," and substorms, while solar wind inputs such as velocity, number density, and interplanetary magnetic field Bz drive these factors and thus correlate with flux. Distributed lag regression models show the time delay of highest influence of these factors on log10 high-energy electron flux (0.7-7.8 MeV, Los Alamos National Laboratory satellites). Multiple regression with an autoregressive term (flux persistence) allows direct comparison of the magnitude of each effect while controlling other correlated parameters. Flux enhancements due to ULF Pc5 and chorus waves are of equal importance. The direct effect of substorms on high-energy electron flux is strong, possibly due to injection of high-energy electrons by the substorms themselves. Loss due to electromagnetic ion cyclotron waves is less influential. Southward Bz shows only moderate influence when correlated processes are accounted for. Adding covariate compression effects (pressure and interplanetary magnetic field magnitude) allows wave-driven enhancements to be more clearly seen. Seed electrons (270 keV) are most influential at lower relativistic energies, showing that such a population must be available for acceleration. However, they are not accelerated directly to the highest energies. Source electrons (31.7 keV) show no direct influence when other factors are controlled. Their action appears to be indirect via the chorus waves they generate. Determination of specific effects of each parameter when studied in combination will be more helpful in furthering modeling work than studying them individually.

77 FR 26509 - Notice of Public Meeting-Cloud Computing Forum & Workshop V

Science.gov (United States)

2012-05-04

...--Cloud Computing Forum & Workshop V AGENCY: National Institute of Standards & Technology (NIST), Commerce. ACTION: Notice. SUMMARY: NIST announces the Cloud Computing Forum & Workshop V to be held on Tuesday... workshop. This workshop will provide information on the U.S. Government (USG) Cloud Computing Technology...

Topic Modeling Reveals Distinct Interests within an Online Conspiracy Forum

Directory of Open Access Journals (Sweden)

Colin Klein

2018-02-01

Full Text Available Conspiracy theories play a troubling role in political discourse. Online forums provide a valuable window into everyday conspiracy theorizing, and can give a clue to the motivations and interests of those who post in such forums. Yet this online activity can be difficult to quantify and study. We describe a unique approach to studying online conspiracy theorists which used non-negative matrix factorization to create a topic model of authors' contributions to the main conspiracy forum on Reddit.com. This subreddit provides a large corpus of comments which spans many years and numerous authors. We show that within the forum, there are multiple sub-populations distinguishable by their loadings on different topics in the model. Further, we argue, these differences are interpretable as differences in background beliefs and motivations. The diversity of the distinct subgroups places constraints on theories of what generates conspiracy theorizing. We argue that traditional “monological” believers are only the tip of an iceberg of commenters. Neither simple irrationality nor common preoccupations can account for the observed diversity. Instead, we suggest, those who endorse conspiracies seem to be primarily brought together by epistemological concerns, and that these central concerns link an otherwise heterogenous group of individuals.

Energy forum 92: Efficiency, trade and the environment

Energy Technology Data Exchange (ETDEWEB)

1992-01-01

In 1992 B.C. Hydro's annual Electric Energy Forum was held in conjunction with the National Energy Forum to provide an opportunity for delegates from utilities, government, industry, international development agencies, environmental groups, universities and interested members of the public to discuss major energy issues of today and tomorrow. Three main themes were addressed: Efficiency (the latest developments in energy-efficient technologies and their role in sustainable development), trade (strategies for trade in energy and related technologies), and environment (the effects of energy production, use and trade on the local, regional and global environment). This document presents opening remarks, speeches presented, and panel discussions.

Meeting report: Global vaccine and immunization research forum.

Science.gov (United States)

Ford, Andrew Q; Touchette, Nancy; Fenton Hall, B; Hwang, Angela; Hombach, Joachim

2018-02-08

Building on the success of the first Global Vaccine and Immunization Research Forum (GVIRF), the World Health Organization, the National Institute of Allergy and Infectious Diseases, part of the National Institutes of Health in the United States of America, and the Bill & Melinda Gates Foundation convened the second GVIRF in March 2016. Leading scientists, vaccine developers, and public health officials from around the world discussed scientific advances and innovative technologies to design and deliver vaccines as well as novel tools and approaches to increase the uptake of vaccines throughout the world. This report summarizes the discussions and conclusions from the forum participants. Copyright © 2018.

Understanding human quality judgment in assessing online forum contents for thread retrieval purpose

Science.gov (United States)

Ismail, Zuriati; Salim, Naomie; Huspi, Sharin Hazlin

2017-10-01

Compared to traditional materials or journals, user-generated contents are not peer-reviewed. Lack of quality control and the explosive growth of web contents make the task of finding quality information on the web especially critical. The existence of new facilities for producing web contents such as forum makes this issue more significant. This study focuses on online forums threads or discussion, where the forums contain valuable human-generated information in a form of discussions. Due to the unique structure of the online forum pages, special techniques are required to organize and search for information in these forums. Quality biased retrieval is a retrieval approach that search for relevant document and prioritized higher quality documents. Despite major concern of quality content and recent development of quality biased retrieval, there is an urgent need to understand how quality content is being judged, for retrieval and performance evaluation purposes. Furthermore, even though there are various studies on the quality of information, there is no standard framework that has been established. The primary aim of this paper is to contribute to the understanding of human quality judgment in assessing online forum contents. The foundation of this study is to compare and evaluate different frameworks (for quality biased retrieval and information quality). This led to the finding that many quality dimensions are redundant and some dimensions are understood differently between different studies. We conducted a survey on crowdsourcing community to measure the importance of each quality dimensions found in various frameworks. Accuracy and ease of understanding are among top important dimensions while threads popularity and contents manipulability are among least important dimensions. This finding is beneficial in evaluating contents of online forum.

Participation in asynchronous online discussion forums does improve student learning of gross anatomy.

Science.gov (United States)

Green, Rodney A; Farchione, Davide; Hughes, Diane L; Chan, Siew-Pang

2014-01-01

Asynchronous online discussion forums are common in blended learning models and are popular with students. A previous report has suggested that participation in these forums may assist student learning in a gross anatomy subject but it was unclear as to whether more academically able students post more often or whether participation led to improved learning outcomes. This study used a path model to analyze the contribution of forum participation, previous academic ability, and student campus of enrolment to final marks in a multicampus gross anatomy course for physiotherapy students. The course has a substantial online learning management system (LMS) that incorporates asynchronous forums as a learning tool, particularly to answer learning objectives. Students were encouraged to post new threads and answer queries in threads started by others. The forums were moderated weekly by staff. Discussion forums were the most used feature of the LMS site with 31,920 hits. Forty-eight percent of the students posted at least once with 186 threads initiated by students and a total of 608 posts. The total number of posts made a significant direct contribution to final mark (P = 0.008) as did previous academic ability (P = 0.002). Although campus did not contribute to final mark, there was a trend for students at the campus where the course coordinator was situated to post more often than those at the other campus (P = 0.073). These results indicate that asynchronous online discussion forums can be an effective tool for improving student learning outcomes as evidenced by final marks in gross anatomy teaching. Copyright © 2013 American Association of Anatomists.

The Influence of Forums and Multilevel Governance on the Climate Adaptation Practices of Australian Organizations

Directory of Open Access Journals (Sweden)

Lorraine E. Bates

2013-12-01

Full Text Available To date, there are few regulations and policies relating to climate change in Australia. Uncertainty about the timing, structure, and potential impact of proposed legislation such as a national carbon abatement scheme, is leading to planning delays across the country. To assist with these policy uncertainties, organizations can embed themselves in multilevel governance frameworks that inform, structure, and facilitate strategic development, planning, and action. As part of these networks, organizational representatives also engage in formal and informal forums, a type of interorganizational relationship, which can include industry task forces, policy development committees, interagency groups, and specific climate change committees. Forums constitute an additional level of governance that influences decision making. The patterns of relationships within these multilevel governance frameworks are examined in this paper, with a focus on the forum level of organizational cooperation. Specifically, we investigate the type of forums operating and their role in supporting organizational responses to climate change. A series of interviews and focus groups were conducted in two study areas, the Swan Canning region of Western Australia and the Hunter / Central Coast region of New South Wales. The results indicate that organizations participate in a diverse range of forums. Further, forums appear to play a key role in the everyday business of organizations by enhancing their ability to plan and address a range of issues, including those associated with climate change. In addition the research highlights some of the barriers and drivers for the development and implementation of climate adaptation practices that emerge from forum discussions. For example, a lack of government guidance in interpreting climate change policy was described as a barrier yet access to the knowledge and expertise of participants was highlighted as a potential driver. The paper

Overview of the First Forum about Informal Science Education

Science.gov (United States)

Lebron Santos, Mayra; Pantoja, Carmen

2018-01-01

The First Forum on Informal Science Education was held at the University of Puerto Rico in 2015. This Forum had the following goals:1. Gather for the first time professionals dedicated to public communication and science outreach in Puerto Rico. 2. Exchange experiences and dissemination strategies with international professional science communicators.3. Encourage a fruitful dialogue between communicators with experience in museums, the media, and the integration of sciences with the arts.4. Encourage dialogue between communicators to facilitate future collaborations.The invited speakers came from Ibero-America and addressed aspects of science communication in museums and the media, the dissemination of science through the arts, the participation of universities in informal science education and the formal education of science communicators. The participants included museum specialists, journalists, artists, outreach specialists, formal educators interested in science outreach, and college students. During the Forum special events for the public were coordinated to celebrate the International Year of Light (2015). The exhibit “Light: Beyond the Bulb” was displayed. Dr. Julieta Fierro, recipient of the prestigious Kalinga Prize for the Popularization of Science awarded by UNESCO, presented the public talk “Light in the Universe”. Dr. Inés Rodríguez Hidalgo, director of the Science Museum of Valladolid, presented the talk "O Sole Mío: An Invitation to Solar Physics". We present an overview of the forum and some critical reflections on the topics discussed.

Developers@CERN Forum | Python at CERN | 30 – 31 May

CERN Multimedia

2016-01-01

The Developers@CERN Forum is an event by developers for developers aimed at promoting knowledge- and experience-sharing (see here). The second forum will take place in the IT auditorium in the afternoons of 30 and 31 May.   With the topic “Python at CERN”, it will consist of a series of talks regarding the Python language, frameworks and tools used at CERN. Are you a Python guru or would you like to learn? Come and share your Python experiences with other developers! Submissions for presentations and workshops are open until 9 May at http://cern.ch/dev-forum. If you would like to stay informed about this or future events, please subscribe to the announcement e-group (just a few e-mails per year) here. 

ELECTRON GUN

Science.gov (United States)

Christofilos, N.C.; Ehlers, K.W.

1960-04-01

A pulsed electron gun capable of delivering pulses at voltages of the order of 1 mv and currents of the order of 100 amperes is described. The principal novelty resides in a transformer construction which is disposed in the same vacuum housing as the electron source and accelerating electrode structure of the gun to supply the accelerating potential thereto. The transformer is provided by a plurality of magnetic cores disposed in circumferentially spaced relation and having a plurality of primary windings each inductively coupled to a different one of the cores, and a helical secondary winding which is disposed coaxially of the cores and passes therethrough in circumferential succession. Additional novelty resides in the disposition of the electron source cathode filament input leads interiorly of the transformer secondary winding which is hollow, as well as in the employment of a half-wave filament supply which is synchronously operated with the transformer supply such that the transformer is pulsed during the zero current portions of the half-wave cycle.

Wind models for zeta Orionis

International Nuclear Information System (INIS)

Olson, G.L.

1979-01-01

Several models for the winds of O stars have been proposed to explain the unexpected presence of high ionization potential ions such as N +4 and O +5 . Lamers and Snow (1978) proposed that the winds of stars showing N V and O VI lines have elevated temperatures near 4 +- 2 x 10 5 K while cooler stars with anomalous Si IV lines have Tsub(e) approximately 7+-3 x 10 4 K. Alternately, Cassinelli and Olson (1978, CO) and Olson (1978) have explained the presence of these ions by showing that a thin corona at the base of a cool wind (Tsub(e) < approximately Tsub(eff)) can produce these ions by the Auger photoionization process where a single X-ray photon causes the ejection of two electrons. A third possibility is that the winds are at only slightly elevated temperatures (40 000 to 60 000K) and photoionization in an optically thick wind produces the unexpected ions. The present analysis tests the ability of these three wind models to fit the observations of zeta Orionis A 09.7 Ib. (Auth.)

What do decision makers learn from public forums on climate-related hazards and resilience?

Science.gov (United States)

Weller, N.; Farooque, M.; Sittenfeld, D.

2017-12-01

Public engagement around climate resilience efforts can foster learning for both public audiences and decision makers. On the one hand, public audiences learn about environmental hazards and strategies to increase community resilience through effective public engagement. On the other, decision makers and scientists learn about community members' values and priorities and their relation to environmental hazards and resilience strategies. Evidence from other public engagement efforts involving decision makers suggests that decision maker involvement results in reflection by officials on their own values, capacities, and roles. However, few public engagement exercises evaluate impacts on decision makers. As part of the Science Center Public Forums project, which aims to conduct public forums in eight cities across the country on resiliency to drought, heat, extreme precipitation, and sea level rise, we sought to 1) build partnerships with local decision makers and scientists around public forums and 2) explore how decision makers and scientists interacted with the planning and undertaking of those public forums. We held workshops with decision makers and scientists to inform forum content and identify local resilience issues. We will conduct interviews with local decision makers regarding their involvement in forum planning, their reflections and takeaways from the forum itself, and their perspectives on the value of public engagement for policy making. We will present our model of engagement with decision makers, initial findings from interviews, and lessons learned from connecting decision makers and scientists to public engagement efforts.

77 FR 74829 - Notice of Public Meeting-Cloud Computing and Big Data Forum and Workshop

Science.gov (United States)

2012-12-18

...--Cloud Computing and Big Data Forum and Workshop AGENCY: National Institute of Standards and Technology... Standards and Technology (NIST) announces a Cloud Computing and Big Data Forum and Workshop to be held on... followed by a one-day hands-on workshop. The NIST Cloud Computing and Big Data Forum and Workshop will...

The Energy Processing by Power Electronics and its Impact on Power Quality

Directory of Open Access Journals (Sweden)

J.E. Rocha

2012-11-01

Full Text Available This paper discusses the electrical architectures adopted in wind turbines and its impact on the harmonic flux at the connected electric network. The integration of wind electric generators with the power grid needs energy processing by power electronics. It shows that different types of wind turbine generator systems use different types of electronic converters. This work provides a discussion on harmonic distortion taking place on the generator side, as well as in the power grid side. Keywords: grid connection, harmonic distortion, power electronics and converters, wind energy conversion systems, wind power, wind technology, wind turbines

Simple Machines Forum, a Solution for Dialogue Optimization between Physicians

Directory of Open Access Journals (Sweden)

Laura SÎNGIORZAN

2013-02-01

Full Text Available We developed an instrument which can ensure a quick and easy dialogue between the physicians of the Oncology Institute and family physicians. The platform we chose was Simple Machines Forum (abbreviated as SMF, a free Internet forum (BBS - Bulletin Board System application. The purpose of this article is not to detail the software platform, but to emphasize the facilities and advantages of using this solution in the medical community.

77 FR 26049 - Reaching Zero: Actions to Eliminate Substance-Impaired Driving Forum

Science.gov (United States)

2012-05-02

... NATIONAL TRANSPORTATION SAFETY BOARD Reaching Zero: Actions to Eliminate Substance-Impaired Driving Forum The National Transportation Safety Board (NTSB) will convene a Public Forum to address Substance-Impaired Driving which will begin at 8:30 a.m., Tuesday, May 15, 2012. NTSB Chairman Deborah A.P...

Low-level waste forum meeting reports

Energy Technology Data Exchange (ETDEWEB)

NONE

1990-12-31

This paper provides highlights from the October 1990 meeting of the Low Level Radioactive Waste Forum. Topics of discussion included: a special session on liability and financial assurance needs; proposal to dispose of mixed waste at federal facilities; state plans for interim storage; and hazardous materials legislation.

Breast cancer and quality of life: medical information extraction from health forums.

Science.gov (United States)

Opitz, Thomas; Aze, Jérome; Bringay, Sandra; Joutard, Cyrille; Lavergne, Christian; Mollevi, Caroline

2014-01-01

Internet health forums are a rich textual resource with content generated through free exchanges among patients and, in certain cases, health professionals. We tackle the problem of retrieving clinically relevant information from such forums, with relevant topics being defined from clinical auto-questionnaires. Texts in forums are largely unstructured and noisy, calling for adapted preprocessing and query methods. We minimize the number of false negatives in queries by using a synonym tool to achieve query expansion of initial topic keywords. To avoid false positives, we propose a new measure based on a statistical comparison of frequent co-occurrences in a large reference corpus (Web) to keep only relevant expansions. Our work is motivated by a study of breast cancer patients' health-related quality of life (QoL). We consider topics defined from a breast-cancer specific QoL-questionnaire. We quantify and structure occurrences in posts of a specialized French forum and outline important future developments.

Members of the Forum Engelberg visit CERN

CERN Multimedia

Patrice Loïez

2002-01-01

The Forum Engelberg is an annual interdisciplinary conference held in Engelberg, Switzerland intended to act as an international platform for debate and exchange of views on key issues affecting scientific research, technology, economics and philosophy. Its President, Hubert Curien - former French Minister of Research and Space Research, and President of the CERN Council from 1994 to 1996 - is pictured here. Photo 01: Hubert Curien in front of the first half of the CMS detector's barrel hadronic calorimeter (HCAL). The barrel HCAL is a cylindrical structure which will surround the collision region and measure the energy of quarks and jets emerging at large angles relative to the beam direction. Photo 02: Hubert Curien (left) with Bernard Ecoffey, Founder of the Forum Engelberg, in front of the first half of the CMS detector's barrel hadronic calorimeter.

77 FR 33777 - General Aviation Safety Forum: Climbing to the Next Level

Science.gov (United States)

2012-06-07

... NATIONAL TRANSPORTATION SAFETY BOARD General Aviation Safety Forum: Climbing to the Next Level The National Transportation Safety Board (NTSB) will convene a 2- day forum focused on safety issues related to... the Next Level,'' will be chaired by NTSB Chairman Deborah A. P. Hersman and all five Board Members...

Abstract Collection of 20th Forum: Third Package and Other Energy Directives

International Nuclear Information System (INIS)

2011-01-01

This years' annual Forum is held twentieth year in a row. Numerous of important topics have been discussed during previous years, tracking all the changes in energy sector, from national monopoly utilities towards open markets, from first visions of consideration of renewable sources of energy towards the present realization of this facilities, from first identification of climate changes issues towards today's achievements in climate control. One could enumerate all the things that changed during this timeframe since it is a period when outlines of new energy policy and technological development were recognized. All these years this was an open space for presentation of ideas and discussions. This Forum hosted many remarkable experts which introduced us with global visions and expectations. In a way, Forum has been leader of changes, a kind of school for development of overall relations in energy sector, and around it. Forum was never a place where conclusions were brought. For some, it is a disadvantage, for us that are the basis of Forums' work, foreseen as a place where different ideas and solutions meet, but not a place for decision-making. Decision-making is foreseen for some other places, and from the profession expectation's point of view. It would be advisable to make those decisions based on the serious and thorough researches. Last 20 years have confirmed a need to continue tradition of the Forum. We hope that choice of new topics and experts will continue to bring new knowledge, experiences and reflections. We would like to continue on being an open space for all ideas that are able to contribute to strategic development of energy sector. (author)

Westinghouse Savannah River Site vendor forum: An innovative cooperative technology development success

International Nuclear Information System (INIS)

Sturm, H.F. Jr.

1996-01-01

The Westinghouse Savannah River Company (WSRC) Supplier Environmental and Waste Management Information Exchange Forum was held August 31 - September 1, 1993. The forum, which was planned and conducted in concert with the Department of Energy Savannah River Operations Office (DOE-SROO), was held to foster a technical exchange in which new, innovative technologies were proposed by suppliers, to identify more cost-effective methods to apply to future and on-going activities, to increase use of the private sector, and to promote partnerships with other industries. The two day forum provided the opportunity for WSRC and DOE-SR to review program activities and challenges in five major areas, Savannah River Technology Center, Solid Waste Facilities, Environmental Restoration, Environmental Monitoring, and Decontamination and Decommissioning through formal presentations. The second day was designed to provide suppliers the opportunity to talk about current and future activities and challenges with representatives of each of these areas at display booths, special high interest topic interactive sessions, and site tours. Each attendee was then invited to submit pre-proposals relative to the abstracts presented in The Special Consolidate Solicitation for Environmental and Waste Management Basic and Applied Research and Research-Related Development and/or Demonstration No. E10600-E1 document. Twenty-five contracts totaling $12 million were awarded. Twenty-four contracts have now been completed. This paper provides an overview of the pre forum activities, the forum, post-forum and proposal review process, and most importantly a description of the technologies demonstrated, the benefits and savings derived, and future use potential from a DOE perspective, as well as technology transfer and industrial partnership potential

Reflections on 'medical tourism' from the 2016 Global Healthcare Policy and Management Forum.

Science.gov (United States)

Crooks, Valorie A; Ormond, Meghann; Jin, Ki Nam

2017-01-01

In October 2016, the Global Healthcare Policy and Management Forum was held at Yonsei University, Seoul, South Korea. The goal of the forum was to discuss the role of the state in regulating and supporting the development of medical tourism. Forum attendees came from 10 countries. In this short report article, we identify key lessons from the forum that can inform the direction of future scholarly engagement with medical tourism. In so doing, we reference on-going scholarly debates about this global health services practice that have appeared in multiple venues, including this very journal. Key questions for future research emerging from the forum include: who should be meaningfully involved in identifying and defining categories of those travelling across borders for health services and what risks exist if certain voices are underrepresented in such a process; who does and does not 'count' as a medical tourist and what are the implications of such quantitative assessments; why have researchers not been able to address pressing knowledge gaps regarding the health equity impacts of medical tourism; and how do national-level polices and initiatives shape the ways in which medical tourism is unfolding in specific local centres and clinics? This short report as an important time capsule that summarises the current state of medical tourism research knowledge as articulated by the thought leaders in attendance at the forum while also pushing for research growth.

Media activism as movement?: collective identity formation in the World Forum of Free Media

OpenAIRE

Stephansen, Hilde C.

2017-01-01

More than simply tools used by social movements to reach other substantive aims, media are increasingly becoming subjects of activism. This article contributes to advancing understanding of such media-focused activism through a case study of the World Forum of Free Media, a thematic forum for media activists and media advocacy organisations linked to the World Social Forum. Based on qualitative research conducted between 2008 and 2016 -including participant observation, in-depth interviews an...

National Forum: How Schools and Parents Can Work Together to Address Bullying

Science.gov (United States)

Australian Government Department of Education, Employment and Workplace Relations, 2012

2012-01-01

On 31 July 2012 the Minister for School Education, Early Childhood and Youth, Peter Garrett convened the "National Forum: How schools and parents can work together to address bullying" at Parliament House. The Forum brought together principals, parents groups, young people, as well as experts in education, child welfare, psychology and…

Effects of Armature Winding Segmentation with Multiple Converters on the Short Circuit Torque of 10-MW Superconducting Wind Turbine Generators

DEFF Research Database (Denmark)

Liu, Dong; Polinder, Henk; Abrahamsen, Asger Bech

2017-01-01

Superconducting synchronous generators (SCSGs) are drawing more attention in large direct-drive wind turbine applications. Despite low weight and compactness, the short circuit torque of an SCSG may be too high for wind turbine constructions due to a large magnetic air gap of an SCSG. This paper...... aims at assessing the effects of armature winding segmentation on reducing the short circuit torque of 10-MW SCSGs. A concept of armature winding segmentation with multiple power electronic converters is presented. Four SCSG designs using different topologies are examined. Results show that armature...... winding segmentation effectively reduce the short circuit torque in all the four SCSG designs when one segment is shorted at the terminal....

Forum: The Lecture and Student Learning. Rethinking Lecture-Learning from Communicative Lenses: A Response to Forum Essays

Science.gov (United States)

Buzzanell, Patrice M.

2017-01-01

This response discusses why the essays in this forum are of particular interest for instructors in light of recent articles in "The Chronicle of Higher Education" and trends in student populations and higher education. "The Chronicle" recently featured several articles on innovative ways to "shake up the lecture" that…

Wind energy literature survey no. 34

DEFF Research Database (Denmark)

Pavese, Christian

2015-01-01

As a service to readers, Wind Energy regularly conducts literature surveys and publishes lists of relevant articles drawnfrom recent issues of Wind Energy itself and a large number of periodicals including Journal of Wind Engineering andIndustrial Aerodynamics, International Journal of Energy...... Research, Renewable Energy, Energy Sources, Journal of SolarEnergy Engineering, American Institute of Aeronautics and Astronautics Journal, Electric Power Components and Systemsalong with a number of periodicals published by the Institute of Electrical and Electronics Engineers, etc. The list...... is limitedexclusively to journals not specifically devoted to wind energy and its applications. To assist the reader, the list is separatedinto broad categories. Although many papers fit several categories, each paper is listed only once under the categorythought most appropriate. Please note that the inclusion...

Critical reading of a text through its electronic supplement

Directory of Open Access Journals (Sweden)

Kieran O’Halloran

2010-10-01

Full Text Available A by-product of new social media platforms is an abundant textual record of engagements – billions of words across the world-wide-web in, for example, discussion forums, blogs and wiki discussion tabs. Many of these engagements consist of commentary on a particular text and can thus be regarded as supplements to these texts. The larger purpose of this article is to flag the utility value of this electronic supplementarity for critical reading by highlighting how it can reveal particular meanings that the text being responded to can reasonably be said to marginalise and / or repress. Given the potentially very large size of social media textual product, knowing how to explore these supplements with electronic text analysis software is essential. To illustrate the above, I focus on how the content of online discussion forums, explored through electronic text analysis software, can be used to assist critical reading of the texts which initiate them. The paper takes its theoretical orientations from the textual intervention work of Rob Pope together with themes in the work of the philosopher, Jacques Derrida.

Low-level waste forum meeting reports

International Nuclear Information System (INIS)

1993-01-01

This paper provides the results of the winter meeting of the Low Level Radioactive Waste Forum. Discussions were held on the following topics: new developments in states and compacts; adjudicatory hearings; information exchange on siting processes, storage surcharge rebates; disposal after 1992; interregional access agreements; and future tracking and management issues

78 FR 78338 - Japan-U.S. Decommissioning and Remediation Fukushima Recovery Forum Tokyo, Japan February 18-19...

Science.gov (United States)

2013-12-26

... DEPARTMENT OF COMMERCE International Trade Administration Japan-U.S. Decommissioning and Remediation Fukushima Recovery Forum Tokyo, Japan February 18-19, 2014 AGENCY: International Trade... Japan-United States Decommissioning and Remediation Fukushima Recovery Forum (``Fukushima Recovery Forum...

Influence Analysis by Heterogeneous Network in MOOC Forums: What Can We Discover?

Science.gov (United States)

Jiang, Zhuoxuan; Zhang, Yan; Liu, Chi; Li, Xiaoming

2015-01-01

With the development of Massive Open Online Courses (MOOC) in recent years, discussion forums there have become one of the most important components for both students and instructors to widely exchange ideas. And actually MOOC forums play the role of social learning media for knowledge propagation. In order to further understand the emerging…

Design of a DC-AC Link Converter for 500W Residential Wind Generator

OpenAIRE

Riza Muhida; Ahmad Firdaus A. Zaidi; Afzeri Tamsir; Rudi Irawan

2012-01-01

 As one of alternative sources of renewable energy, wind energy has an excellence prospect in Indonesia, particularly in coastal and hilly areas which have potential wind to generate electricity for residential uses. There is urgent need to locally develop low cost inverter of wind generator system for residential use. Recent developments in power electronic converters and embedded computing allow improvement of power electronic converter devices that enable integration of microcontrollers in...

Solar wind modulation of the Martian ionosphere observed by Mars Global Surveyor

Directory of Open Access Journals (Sweden)

J.-S. Wang

2004-06-01

Full Text Available Electron density profiles in the Martian ionosphere observed by the radio occultation experiment on board Mars Global Surveyor have been analyzed to determine if the densities are influenced by the solar wind. Evidence is presented that the altitude of the maximum ionospheric electron density shows a positive correlation to the energetic proton flux in the solar wind. The solar wind modulation of the Martian ionosphere can be attributed to heating of the neutral atmosphere by the solar wind energetic proton precipitation. The modulation is observed to be most prominent at high solar zenith angles. It is argued that this is consistent with the proposed modulation mechanism.

Jobs and Education: A Progress Report and Open Forum

Science.gov (United States)

Nero, Anthony V.

1996-03-01

Given its current importance, the issue of jobs and education has stimulated much activity in the last year on the part of members of the Society, various units of the Society, and related institutions, such as the AIP and AAPT. At the last March meeting in particular, many of the most well-attended and vigorous sessions and other events were those related to careers or related issues in education. In part stimulated by this high level of activity, but also because of independently arranged events and organizational activities, several important developments have been proceeding during the past year. This session will report briefly on progress in these areas, then proceed to an open forum on these developments and others that might be considered to improve the situation on jobs and education, including the role that individuals or groups - whether students, faculty, or other physicists, or whether young or older - may play. In the first part of the session, the panelists will make reports of 10 to 15 minutes each. The open forum will explore both the issues raised during the panel talks or other issues raised by the audience. Members of the audience or panel can pose questions, make statements, or respond to questions or statements, in any case being limited to three minutes. The chair will regulate the discussion to assure that a wide range of topics and views are expressed. Finally, we note that many of the issues dealt with in this session are under current discussion in the ongoing internet "conference" on "jobs and education" initiated after last March's session on this topic. Those wishing to subscribe to this discussion list should send an email message to majordomo@physics.wm.edu whose body reads "subscribe jobs-ed". They will, in return, receive information on how to participate in the internet discussion, including instructions on how to access various documents related to careers, such as a summary of last year's session (and, before long, of this

Beyond “Political” Communicative Spaces : Talking Politics on the Wife Swap Discussion Forum

NARCIS (Netherlands)

Graham, T.S.

2012-01-01

Net-based public sphere researchers have examined online deliberation in numerous ways. However, most studies have focused exclusively on political discussion forums. This article moves beyond such spaces by analyzing political talk from an online forum dedicated to reality television. The purpose

Grid connection of active stall wind farms using a VSC based DC transmission system

DEFF Research Database (Denmark)

Iov, F.; Sørensen, Poul Ejnar; Hansen, A.D.

2005-01-01

Currently, there is an increasing trend to connect large MW wind farms to the transmission system. Requirements that focus on the influence of the farms on the grid stability and power quality, and on the control capabilities of wind farms have already been established. The main trends of modern...... wind turbines/farms are clearly the variable speed operation and a grid connection through a power electronic interface, especially using doubly fed induction generators. Using power electronics the control capabilities of these wind turbines/farms are extended and thus the grid requirements...... are fulfilled. However, the traditional squirrel-cage generators based wind turbines/wind farms directly connected to the grid have less control capabilities. These wind turbines/farms cannot regulate their production and contribute to power system stability. A DC transmission system for connection...

Variable frequency operation of active stall wind farms using a dc connection to grid

DEFF Research Database (Denmark)

Iov, Florin; Blaabjerg, Frede; Sorensen, Poul

2005-01-01

Currently, there is an increasing trend to connect large MW wind farms to the transmISSIon system. Requirements that focus on the influence of the farms on the grid stability and power quality, and on the control capabilities of wind farms have already been established. The main trends of modern...... wind turbines/farms are clearly the variable speed operation and a grid connection through a power electronic interface, especially using doubly-fed induction generators. Using power electronics the control capabilities of these wind turbines/farms are extended and thus the grid requirements...... are fulfilled. However, the traditional squirrel-cage generators based wind turbines/wind farms directly connected to the grid have less control capabilities. These wind turbines/farms cannot regulate their production and contribute to power system stability. A DC transmission system for connection...

Transient stability enhancement of wind farms using power electronics and facts controllers

Science.gov (United States)

Mohammadpour, Hossein Ali

Nowadays, it is well-understood that the burning of fossil fuels in electric power station has a significant influence on the global climate due to greenhouse gases. In many countries, the use of cost-effective and reliable low-carbon electricity energy sources is becoming an important energy policy. Among different kinds of clean energy resources- such as solar power, hydro-power, ocean wave power and so on, wind power is the fastest-growing form of renewable energy at the present time. Moreover, adjustable speed generator wind turbines (ASGWT) has key advantages over the fixed-speed generator wind turbines (FSGWT) in terms of less mechanical stress, improved power quality, high system efficiency, and reduced acoustic noise. One important class of ASGWT is the doubly-fed induction generator (DFIG), which has gained a significant attention of the electric power industry due to their advantages over the other class of ASGWT, i.e. fully rated converter-based wind turbines. Because of increased integration of DFIG-based wind farms into electric power grids, it is necessary to transmit the generated power from wind farms to the existing grids via transmission networks without congestion. Series capacitive compensation of DFIG-based wind farm is an economical way to increase the power transfer capability of the transmission line connecting wind farm to the grid. For example, a study performed by ABB reveals that increasing the power transfer capability of an existing transmission line from 1300 MW to 2000 MW using series compensation is 90% less than the cost of building a new transmission line. However, a factor hindering the extensive use of series capacitive compensation is the potential risk of sub- synchronous resonance (SSR). The SSR is a condition where the wind farm exchanges energy with the electric network, to which it is connected, at one or more natural frequencies of the electric or mechanical part of the combined system, comprising the wind farm and the

Cup anemometer response to the wind turbulence-measurement of the horizontal wind variance

Directory of Open Access Journals (Sweden)

S. Yahaya

2004-11-01

Full Text Available This paper presents some dynamic characteristics of an opto-electronic cup anemometer model in relation to its response to the wind turbulence. It is based on experimental data of the natural wind turbulence measured both by an ultrasonic anemometer and two samples of the mentioned cup anemometer. The distance constants of the latter devices measured in a wind tunnel are in good agreement with those determined by the spectral analysis method proposed in this study. In addition, the study shows that the linear compensation of the cup anemometer response, beyond the cutoff frequency, is limited to a given frequency, characteristic of the device. Beyond this frequency, the compensation effectiveness relies mainly on the wind characteristics, particularly the direction variability and the horizontal turbulence intensity. Finally, this study demonstrates the potential of fast cup anemometers to measure some turbulence parameters (like wind variance with errors of the magnitude as those deriving from the mean speed measurements. This result proves that fast cup anemometers can be used to assess some turbulence parameters, especially for long-term measurements in severe climate conditions (icing, snowing or sandy storm weathers.

Low Energy Electrons in the Mars Plasma Environment

Science.gov (United States)

Link, Richard

2001-01-01

The ionosphere of Mars is rather poorly understood. The only direct measurements were performed by the Viking 1 and 2 landers in 1976, both of which carried a Retarding Potential Analyzer. The RPA was designed to measure ion properties during the descent, although electron fluxes were estimated from changes in the ion currents. Using these derived low-energy electron fluxes, Mantas and Hanson studied the photoelectron and the solar wind electron interactions with the atmosphere and ionosphere of Mars. Unanswered questions remain regarding the origin of the low-energy electron fluxes in the vicinity of the Mars plasma boundary. Crider, in an analysis of Mars Global Surveyor Magnetometer/Electron Reflectometer measurements, has attributed the formation of the magnetic pile-up boundary to electron impact ionization of exospheric neutral species by solar wind electrons. However, the role of photoelectrons escaping from the lower ionosphere was not determined. In the proposed work, we will examine the role of solar wind and ionospheric photoelectrons in producing ionization in the upper ionosphere of Mars. Low-energy (internal (photoelectron) sources of ionization, and accounts for Auger electron production. The code will be used to analyze Mars Global Surveyor measurements of solar wind and photoelectrons down to altitudes below 200 km in the Mars ionosphere, in order to determine the relative roles of solar wind and escaping photoelectrons in maintaining plasma densities in the region of the Mars plasma boundary.

Generating Benefits and Negotiating Tensions through an International Doctoral Forum: A Sociological Analysis

Directory of Open Access Journals (Sweden)

Guanglun Michael Mu

2016-02-01

Full Text Available Workshops and seminars are widely-used forms of doctoral training. However, research with a particular focus on these forms of doctoral training is sporadic in the literature. There is little, if any, such research concerning the international context and participants’ own voices. Mindful of these lacunae in the literature, we write the current paper as a group of participants in one of a series of doctoral forums co-organised annually by Beijing Normal University, China and Queensland University of Technology, Australia. The paper voices our own experiences of participation in the doctoral forum. Data were drawn from reflections, journals, and group discussions of all 12 student and academic participants. These qualitative data were organised and analysed through Bourdieu’s notions of capital and field. Findings indicate that the doctoral forum created enabling and challenging social fields where participants accrued and exchanged various forms of capital and negotiated transient and complex power relations. In this respect, the sociological framework used provides a distinctive theoretical tool to conceptualise and analyse the benefits and tensions of participation in the doctoral forum. Knowledge built and lessons learned through our paper will provide implications and recommendations for future planning of, and participation in, the doctoral forum series and similar activities elsewhere.

Variable slip wind generator modeling for real-time simulation

Energy Technology Data Exchange (ETDEWEB)

Gagnon, R.; Brochu, J.; Turmel, G. [Hydro-Quebec, Varennes, PQ (Canada). IREQ

2006-07-01

A model of a wind turbine using a variable slip wound-rotor induction machine was presented. The model was created as part of a library of generic wind generator models intended for wind integration studies. The stator winding of the wind generator was connected directly to the grid and the rotor was driven by the turbine through a drive train. The variable resistors was synthesized by an external resistor in parallel with a diode rectifier. A forced-commutated power electronic device (IGBT) was connected to the wound rotor by slip rings and brushes. Simulations were conducted in a Matlab/Simulink environment using SimPowerSystems blocks to model power systems elements and Simulink blocks to model the turbine, control system and drive train. Detailed descriptions of the turbine, the drive train and the control system were provided. The model's implementation in the simulator was also described. A case study demonstrating the real-time simulation of a wind generator connected at the distribution level of a power system was presented. Results of the case study were then compared with results obtained from the SimPowerSystems off-line simulation. Results showed good agreement between the waveforms, demonstrating the conformity of the real-time and the off-line simulations. The capability of Hypersim for real-time simulation of wind turbines with power electronic converters in a distribution network was demonstrated. It was concluded that hardware-in-the-loop (HIL) simulation of wind turbine controllers for wind integration studies in power systems is now feasible. 5 refs., 1 tab., 6 figs.

AMCP Partnership Forum: Driving Value and Outcomes in Oncology.

Science.gov (United States)

2017-05-01

Innovation in cancer treatment has provided a wealth of recently available therapeutic agents and a healthy drug pipeline that promises to change the way we approach this disease and the lives of those affected in the years to come. However, the majority of these new agents, many of which are targeted to specific genomic features of various tumors, may challenge the health care system's ability to afford cancer care. This innovation drives the need to focus on the value of the treatments provided to patients with cancer and on methods to optimize the efficiency of the dollars we spend, in addition to the clinical value itself. The Academy of Managed Care Pharmacy (AMCP) convened a Partnership Forum to address how to improve value and outcomes in cancer care. In this multistakeholder forum, several areas were addressed: current methods for assessing the value of oncology products, the need for balancing population management with precision medicine, and the outlook for value-based contracting for oncology medications in managed care settings. Participants recommended ways in which stakeholders can work toward solutions in these areas. The forum brought together stakeholders from health plans, integrated delivery systems, pharmacy benefit managers, clinical practice, biopharmaceutical industry, and laboratory companies. Also participating were representatives from trade and professional associations. During this 1.5-day forum, participants identified current challenges, readiness, and ways to address value and improve outcomes in cancer therapy. Some of the challenges identified include choosing a viable (and practical) outcome target for value-based contracting in oncology, the development and use of value frameworks and clinical pathways, managing cancer diagnostics, utilization of alternative payment systems, moving from a large evidence base to a small clinical trial base in considering targeted treatments, and lack of best practices in value-based payment

Evaluating the Quality of Interaction in Asynchronous Discussion Forums in Fully Online Courses

Science.gov (United States)

Nandi, Dip; Hamilton, Margaret; Harland, James

2012-01-01

Fully online courses are becoming progressively more popular because of their "anytime anywhere" learning flexibility. One of the ways students interact with each other and with the instructors within fully online learning environments is via asynchronous discussion forums. However, student engagement in online discussion forums does not…

Wind Energy literature survey no. 32

DEFF Research Database (Denmark)

Henriksen, Lars Christian

2014-01-01

As a service to readers, Wind Energy regularly conducts literature surveys and publishes lists of relevant articles drawn from recent issues of Wind Energy itself and a large number of periodicals including the following: Journal of Wind Engineering and Industrial Aerodynamics, International...... Journal of Energy Research, Renewable Energy, Energy Sources, Journal of Solar Energy Engineering, American Institute of Aeronautics and Astronautics Journal, Electric Power Components and Systems along with a number of periodicals published by the Institute of Electrical and Electronics Engineers, and so...... on. The list is limited exclusively to journals not specifically devoted to wind energy and its applications. To assist the reader, the list is separated into broad categories. Although many papers fit several categories, each paper is listed only once under the category thought most appropriate...

Wind Energy literature survey no. 31

DEFF Research Database (Denmark)

Henriksen, Lars Christian

2014-01-01

As a service to readers, Wind Energy regularly conducts literature surveys and publishes lists of relevant articles drawn from recent issues of Wind Energy itself and a large number of periodicals including: Journal of Wind Engineering and Industrial Aerodynamics, International Journal of Energy...... Research, Renewable Energy, Energy Sources, Journal of Solar Energy Engineering, American Institute of Aeronautics and Astronautics Journal, Electric Power Components and Systems along with a number of periodicals published by the Institute of Electrical and Electronics Engineers, and so on. The list...... is limited exclusively to journals not specifically devoted to wind energy and its applications. To assist the reader, the list is separated into broad categories. Although many papers fit several categories, each paper is listed only once under the category thought most appropriate. Please note...

Wind energy literature survey no. 33

DEFF Research Database (Denmark)

Pavese, Christian

2014-01-01

As a service to readers, Wind Energy regularly conducts literature surveys and publishes lists of relevant articles drawn from recent issues of Wind Energy itself and a large number of periodicals, including the following: Journal of Wind Engineering and Industrial Aerodynamics, International...... Journal of Energy Research, Renewable Energy, Energy Sources, Journal of Solar Energy Engineering, American Institute of Aeronautics and Astronautics Journal, Electric Power Components and Systems along with a number of periodicals published by the Institute of Electrical and Electronics Engineers, and so...... on. The list is limited exclusively to journals not specifically devoted to wind energy and its applications. To assist the reader, the list is separated into broad categories. Although many papers fit several categories, each paper is listed only once under the category thought most appropriate...

Proceedings of a national food irradiation forum

International Nuclear Information System (INIS)

Van Noort, G.

1989-01-01

The proceedings of a national food irradiation forum are presented. The status of food radurization in South Africa is discussed in detail. Consumer attitudes to radurization are also looked at and the statutory control of food irradiation in South Africa is described

Proposed Federal Gun-Control Amendment. Student Forum.

Science.gov (United States)

Mertz, Gayle; Mertz, David

1995-01-01

Presents an outline for a student-run forum on a proposed federal gun control amendment. Procedures include mandatory reading assignments and researching the issue. Students role-play fictional representative characters and later facilitate discussions. Concludes with a vote on the amendment. (MJP)

LLW Forum meeting report

International Nuclear Information System (INIS)

1991-01-01

This document reports the details of the Quarterly Meeting of the Low- Level Radioactive Waste Forum held in San Diego, California during January 23-25, 1991. Topics discussed include: State and Compact Progress Reports; Legal Updates; Update on Technical Assistance; Advanced Notice of Proposed Rulemaking Regarding Surcharge Rebates; Update on TCC Activities; NRC Update; Disposal of Commercial Mixed Waste; Update on EPA Activities; ACNW Working Group on Mixed Waste; National Profile on Mixed Waste; Commercial Perspective on Mixed Waste; Update on DOT Activities; Source Terms; Materials and Waste; Storage: and Waste Acceptance Criteria and Packaging

Heating of Solar Wind Ions via Cyclotron Resonance

Science.gov (United States)

Navarro, R.; Moya, P. S.; Figueroa-Vinas, A.; Munoz, V.; Valdivia, J. A.

2017-12-01

Remote and in situ observations in the solar wind show that ion and electron velocity distributions persistently deviate from thermal equilibrium in the form of relative streaming between species components, temperature anisotropy, etc. These non-thermal features represent a source of free energy for the excitation of kinetic instabilities and fluctuations in the plasma. In this regard, it is believed that plasma particles can be heated, through a second order Fermi acceleration process, by multiple resonances with unstable counter-propagating field-aligned Ion-cyclotron waves. For multi-species plasmas, several collective wave modes participate in this process. In this work, we test this model by studying the percentage of ions that resonate with the waves modes described by the proper kinetic multi-species dispersion relation in a solar-wind-like plasma composed of electrons, protons, and alpha particles. Numerical results are compared with WIND spacecraft data to test its relevance for the existence of thresholds for the preferential perpendicular heating of He+2 ions as observed in the solar wind fast streams.

LLW Forum meeting report, January 31--February 3, 1995

International Nuclear Information System (INIS)

1995-01-01

The Low-Level Radioactive Waste Forum (LLW) is an association of state and compact representatives, appointed by governors and compact commissions, established to facilitate state and compact implementation of the Low-Level Radioactive Waste Policy Act of 1980 and the Low-Level Radioactive Waste Policy Amendments Act of 1985 and to promote the objectives of low-level radioactive waste regional compacts. The LLW Forum provides an opportunity for state and compact officials to share information with one another and to exchange views with officials of federal agencies and other interested parties. This report details activities of the meeting held January 31-February 3, 1995

LLW Forum meeting report, January 31--February 3, 1995

Energy Technology Data Exchange (ETDEWEB)

NONE

1995-12-31

The Low-Level Radioactive Waste Forum (LLW) is an association of state and compact representatives, appointed by governors and compact commissions, established to facilitate state and compact implementation of the Low-Level Radioactive Waste Policy Act of 1980 and the Low-Level Radioactive Waste Policy Amendments Act of 1985 and to promote the objectives of low-level radioactive waste regional compacts. The LLW Forum provides an opportunity for state and compact officials to share information with one another and to exchange views with officials of federal agencies and other interested parties. This report details activities of the meeting held January 31-February 3, 1995.

Low-level waste forum meeting reports

Energy Technology Data Exchange (ETDEWEB)

NONE

1995-12-31

This paper provides highlights from the 1995 summer meeting of the Low Level radioactive Waste Forum. Topics included: new developments in state and compacts; federal waste management; DOE plans for Greater-Than-Class C waste management; mixed wastes; commercial mixed waste management; international export of rad wastes for disposal; scintillation cocktails; license termination; pending legislation; federal radiation protection standards.

Low-level waste forum meeting reports

International Nuclear Information System (INIS)

1995-01-01

This paper provides highlights from the 1995 summer meeting of the Low Level radioactive Waste Forum. Topics included: new developments in state and compacts; federal waste management; DOE plans for Greater-Than-Class C waste management; mixed wastes; commercial mixed waste management; international export of rad wastes for disposal; scintillation cocktails; license termination; pending legislation; federal radiation protection standards

The Crab nebula's ''wisps'' as shocked pulsar wind

International Nuclear Information System (INIS)

Gallant, Y.A.; Arons, J.; Langdon, A.B.

1992-01-01

The Crab synchrotron nebula has been successfully modelled as the post-shock region of a relativistic, magnetized wind carrying most of the spindown luminosity from the central pulsar. While the Crab is the best-studied example, most of the highest spindown luminosity pulsars are also surrounded by extended synchrotron nebulae, and several additional supernova remnants with ''plerionic'' morphologies similar to the Crab are known where the central object is not seen. All these objects have nonthermal, power-law spectra attributable to accelerated high-energy particles thought to originate in a Crab-like relativistic pulsar wind. However, proposed models have so far treated the wind shock as an infinitesimally thin discontinuity, with an arbitrarily ascribed particle acceleration efficiency. To make further progress, investigations resolving the shock structure seemed in order. Motivated by these considerations, we have performed ''particle-in-cell (PIC) simulations of perpendicularly magnetized shocks in electron-positron and electron-positron-ion plasmas. The shocks in pure electron-positron plasmas were found to produce only thermal distributions downstream, and are thus poor candidates as particle acceleration sites. When the upstream plasma flow also contained a smaller population of positive ions, however, efficient acceleration of positrons, and to a lesser extent of electrons, was observed in the simulations

Evaluation of an international and interprofessional collaboration forum.

Science.gov (United States)

Stone, Teresa; Hua, Susan; Turale, Sue

2016-11-01

International and interprofessional collaborations are increasingly becoming a core requirement for health professionals in our globalized world. The aim of this study was to evaluate the effectiveness of the Asia Pacific Alliance of Health Leaders (APAHL) Forum to enhance the development of international perspectives and leadership among students and faculty in the discipline of health. This pilot study used a student-designed questionnaire to evaluate the views of students and faculty members about the effectiveness of APAHL in meeting its goals. Quantitative data from the scaled items on the questionnaire were analyzed by aggregating the data. Qualitative data were analyzed using a qualitative descriptive approach. Study participants comprised of 22 health science (nursing and laboratory science) students and 15 faculty members. Both faculty and students agreed that APAHL was effective in leadership development of students, as well as in advancing internationalization, interprofessional collaboration, and cultural awareness among students. A clear theme among the students was acknowledgement of the importance of communication, in particular being proficient in English. Difficulties in communication were an issue for both students and faculty members. This pilot study has shown the benefits of a student-focused international forum in developing cross-cultural awareness, and will provide the groundwork for evaluating the effectiveness of cross-cultural and interprofessional leadership forums aimed particularly at students of health. Copyright © 2016 Elsevier Ltd. All rights reserved.

Papers of the PTAC energy conservation and air emissions case studies forum

Energy Technology Data Exchange (ETDEWEB)

NONE

2004-07-01

This forum discussed different approaches to energy consumption and GHG emissions from the upstream oil and gas sector in Canada. Overviews of new technologies for emissions reduction and eco-efficiency were presented, such as the use of catalytic converters and fire-tube immersion heaters. Approaches to energy efficiency through lubrication procedures, pneumatic instrumentation and incinerators were also presented. Issues concerning cost reduction and natural gas emissions were discussed, as well as the use of energy monitoring systems to promote profit and efficiency. The optimization of various systems was also a focal point of the forum, including new methods and approaches towards mole sieve adsorption cycle optimization. Twelve papers were presented at this forum, three of which have been catalogued separately for inclusion in this database. tabs, figs.

Economic Research Forum - Core Support 2012-2014 | IDRC ...

International Development Research Centre (IDRC) Digital Library (Canada)

The Economic Research Forum (ERF) is a Cairo-based regional economics ... resource for researchers, publishing The Middle East Development Journal, and ... long-term climate action to reduce social inequality, promote greater gender ...

Proceedings of the PV self-consumption forum held at Rennes on February 8

International Nuclear Information System (INIS)

Ramard, Dominique; Laffaille, Didier; Lextrait, Herve; Richard, Pascal; Loyen, Richard; Gautier, Charles Antoine; Concas, Giorgia; Djahel, Thierry; Dehaese, Olivier; Rolland, Nicolas; Brossard, Clement; Labrune, Sylvere; Landais, Sebastien; Laurans, Bernard; Autric, Thierry; Mingant, Sylvie; Lamy, Marie-Laure; Lorant, Jacky; Woodrow, Mariana; Alazard, Raymond; Mathieu, Antoine; Ricaud, Claude; Lacirignola, Martino

2017-02-01

During this forum dedicated to photovoltaic (PV) self-consumption in Brittany region (Western France), the following topics were debated: - the direct generation of green electricity to cover ones' own needs and to share surplus with neighbours in economically interesting conditions; - the economical and legal frameworks of self-consumption in the residential, tertiary and industrial sectors and their evolution; - from individual to collective self-consumption: experience feedbacks and evaluation tools in France and in Europe. This document brings together the presentations (slides) given at this forum. A project structuring guide for photovoltaic (PV) self-consumption projects was elaborated after the forum and is presented in introduction

Energy forum 2005: Nuclear power - in competition with sustainable energy supply in Europe. Lectures

International Nuclear Information System (INIS)

2005-01-01

The forum of energy for future organized on 29st September 2005 the annual Energy Forum at Berlin. The Energy Forum 2005 dealt with nuclear power in competition with sustainable energy supply in Europe and didn't only give their members the possibility of a discussion on this actual theme. Furtheron demanding aims on CO2-reduction, increased raw material- and energy prices as the construction of a new Finnish nuclear power plant have countries moved to evaluate again the future-oriented role of nuclear power. (orig./GL)

Effects of the Solar Wind Pressure on Mercury's Exosphere: Hybrid Simulations

Science.gov (United States)

Travnicek, P. M.; Schriver, D.; Orlando, T. M.; Hellinger, P.

2017-12-01

We study effects of the changed solar wind pressure on the precipitation of hydrogen on the Mercury's surface and on the formation of Mercury's magnetosphere. We carry out a set of global hybrid simulations of the Mercury's magnetosphere with the interplanetary magnetic field oriented in the equatorial plane. We change the solar wind pressure by changing the velocity of injected solar wind plasma (vsw = 2 vA,sw; vsw = 4 vA,sw; vsw = 6 vA,sw). For each of the cases we examine proton and electron precipitation on Mercury's surface and calculate yields of heavy ions released from Mercury's surface via various processes (namely: Photo-Stimulated Desorption, Solar Wind Sputtering, and Electron Stimulated Desorption). We study circulation of the released ions within the Mercury's magnetosphere for the three cases.

Silencing dissent in an online discussion forum of a higher education institution

Directory of Open Access Journals (Sweden)

Louise Postma

2013-12-01

Full Text Available In an online forum at a higher education institution in South Africa, interventions from management in order to moderate discussions, result in antagonism and the smothering of dissident discourse. Critical poststructuralist theory, the model of communicative democratic discourse as held by Iris Marion Young, and the tenets of ideal speech as held by Jürgen Habermas, inform the study while it investigates how the internal and external moderation of the forum limit and terminate essential discourse which could be instrumental in the critical construction of meaning and the exercise of freedom of speech. The methodology of grounded theory and the approach of critical discourse analysis direct the exploration of interview transcripts and forum text. In the analysis of characteristics displayed in discursive moderating strategies, the researchers are enabled to propose a form of emancipatory moderation within the discourse which could result in better understanding among opposing parties. The hegemonous and distant character as seen in the discourse concerning current moderation is subversed to allow participatory and equal moderation for the establishment of an enabling, accepting and diverse online environment. Keywords: moderation of online forum; higher education institution; freedom of speech; censorship; democratic discourse

Musharraf to address World Economic Forum at Davos

CERN Multimedia

2006-01-01

President General Pervez Mushrraf will lead Pakistan's delegation to the annual meeting of world economic forum at Davos. The theme of this year's meeting beginning on January 25 is "The Creative Imperative" (1 page)

Generators of Modern Wind Turbines

DEFF Research Database (Denmark)

Chen, Zhe

2008-01-01

In this paper, various types of wind generator configurations, including power electronic grid interfaces, drive trains, are described The performance in power systems is briefed. Then the optimization of generator system is presented. Some investigation results are presented and discussed....

The environmental communication forum | Goetz | Southern African ...

African Journals Online (AJOL)

The establishment, Modus operandi and aims of the Environmental Communicators Forum in the greater Durban area is described. Full Text: EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT · DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT · Creative Commons License This work is licensed under a Creative ...

Ion acoustic waves and related plasma observations in the solar wind

International Nuclear Information System (INIS)

Gurnett, D.A.; Marsch, E.; Pilipp, W.; Schwenn, R.; Rosenbauer, H.

1979-01-01

This paper presents an investigation of solar wind ion acoustic waves and their relationship to the macroscopic and microscopic characteristics of the solar wind plasma. Comparisons with the overall solar wind corotational structure show that the most intense ion acoustic waves usually occur in the low-velocity regions ahead of high-speed solar wind streams. Of the detailed plasma parameters investigated, the ion acoustic wave intensities are found to be most closely correlated with the electron to proton temperature ratio T/sub e//T/sub p/ and with the electron heat flux. Investigations of the detailed electron and proton distribution functions also show that the ion acoustic waves usually occur in regions with highly non-Maxwellian distributions characteristic of double-proton streams. The distribution functions for the double-proton streams are usually not resolved into two clearly defined peaks, but rather they appear as a broad shoulder on the main proton distribution. Two main mechanisms, an electron heat flux instability and a double-ion beam instability, are considered for generating the ion-acoustic-like waves observed in the solar wind. Both mechanisms have favorable and unfavorable features. The electron heat flux mechanism can account for the observed waves at moderate to large ratios of T/sub e//T/sub p/ but has problems when T/sub e//T/sub p/ is small, as sometimes occurs. The ion beam instability appears to provide more flexibility on the T/sub e//T/sub p/ ratio; however detailed comparisons using observed distribution functions indicate that the ion beam mode is usually stable. Possible resolutions of these difficulties are discussed

Epidemic model for information diffusion in web forums: experiments in marketing exchange and political dialog.

Science.gov (United States)

Woo, Jiyoung; Chen, Hsinchun

2016-01-01

As social media has become more prevalent, its influence on business, politics, and society has become significant. Due to easy access and interaction between large numbers of users, information diffuses in an epidemic style on the web. Understanding the mechanisms of information diffusion through these new publication methods is important for political and marketing purposes. Among social media, web forums, where people in online communities disseminate and receive information, provide a good environment for examining information diffusion. In this paper, we model topic diffusion in web forums using the epidemiology model, the susceptible-infected-recovered (SIR) model, frequently used in previous research to analyze both disease outbreaks and knowledge diffusion. The model was evaluated on a large longitudinal dataset from the web forum of a major retail company and from a general political discussion forum. The fitting results showed that the SIR model is a plausible model to describe the diffusion process of a topic. This research shows that epidemic models can expand their application areas to topic discussion on the web, particularly social media such as web forums.

Generation 4 International Forum. 2014 Annual Report

International Nuclear Information System (INIS)

2015-01-01

This eighth edition of the Generation IV International Forum (GIF) Annual Report highlights the main achievements of the Forum in 2014, and in particular progress made in the collaborative RandD activities of the eleven existing project arrangements for the six GIF systems: the gas-cooled fast reactor, the sodium-cooled fast reactor, the supercritical-water-cooled reactor and the very-high-temperature reactor. Progress made under the memoranda of understanding for the lead-cooled fast reactor and the molten salt reactor is also reported. In May 2014, China joined the supercritical-water-cooled reactor system arrangement; and in October 2014, the project arrangement on system integration and assessment for the sodium-cooled fast reactor became effective. GIF also continued to develop safety design criteria and guidelines for the sodium-cooled fast reactor, and to engage with regulators on safety approaches for generation IV systems. Finally, GIF initiated an internal discussion on sustainability approaches to complement ongoing work on economics, safety, proliferation resistance and physical protection

Proceedings of the driving safety technology forum

Energy Technology Data Exchange (ETDEWEB)

NONE

2006-07-01

This one day forum focused on improving driving safety in the petroleum industry by introducing new technologies and strategies. The forum featured several keynote addresses on driving safety as well as the Government of Alberta's Tactical Plan and Alberta Road Safety at Work Strategy. Presentations consisted of success stories of new technology or process applications or proposed technology demonstration projects followed by question and answer panels around the following topics: industry and government strategies; driver fatigue management and prevention; driver behaviour and culture change; vehicle monitoring systems and innovative wildlife avoidance techniques. Specific presentations addressed BP's driving safety strategy, in-cabin air quality and truck drivers' health and safety and how Talisman Energy implemented oilfield fleet safety using event driven automated vehicle location technologies. A total of 3 keynote addresses, 3 panel question and answer sessions and 11 presentations were presented at the conference, of which 3 have been catalogued separately for inclusion in this database. refs., tabs., figs.

The development of the Asian Forum for Polar Sciences (AFoPS)

Science.gov (United States)

Kim, Yeadong; Jeong, Jihoon

2015-12-01

The Asian Forum for Polar Sciences (AFoPS), an international forum of Asian polar research institutes, was established for the advancement of polar sciences among its members in 2004. The Forum has served as an important medium of Asian collective endeavors for polar affairs in human and information exchange, research collaboration, and logistics cooperation for the last decade. The historical development of the AFoPS in retrospect can be divided into four phases: inception and establishment (2003-2004), growth and expansion (2005-2007), review and restructuring (2008-2011), and achievements and further measures (2012-2014). The progress of the AFoPS has not been linear and this trend will continue into the next decades. The Forum, however, clearly made achievements in this period of time, realizing multilateral research and logistics cooperation that would have been previously unimaginable; by doing so, it has laid the foundation for the future. Responsible for a great portion of the world's polar activities, the AFoPS will rise to meet the expectations of the world by producing notable research output, initiating international cooperative programs, and supporting non-polar Asian countries with education and research collaboration. These are the tasks of the AFoPS for the next decade and they require strategy that promotes and facilitates collaboration in a practical way and draws attention of non-polar Asian countries to the polar sciences.

Low-level waste forum meeting reports

International Nuclear Information System (INIS)

1992-01-01

This paper provides highlights from the spring meeting of the Low Level Radioactive Waste Forum. Topics of discussion included: state and compact reports; New York's challenge to the constitutionality of the Low-Level Radioactive Waste Amendments Act of 1985; DOE technical assistance for 1993; interregional import/export agreements; Department of Transportation requirements; superfund liability; nonfuel bearing components; NRC residual radioactivity criteria

AMCP Partnership Forum: Advancing Value-Based Contracting.

Science.gov (United States)

2017-11-01

During the past decade, payment models for the delivery of health care have undergone a dramatic shift from focusing on volume to focusing on value. This shift began with the Affordable Care Act and was reinforced by the Medicare Access and CHIP Reauthorization Act of 2015 (MACRA), which increased the emphasis on payment for delivery of quality care. Today, value-based care is a primary strategy for improving patient care while managing costs. This shift in payment models is expanding beyond the delivery of health care services to encompass models of compensation between payers and biopharmaceutical manufacturers. Value-based contracts (VBCs) have emerged as a mechanism that payers may use to better align their contracting structures with broader changes in the health care system. While pharmaceuticals represent a small share of total health care spending, it is one of the fastest-growing segments of the health care marketplace, and the increasing costs of pharmaceuticals necessitate more flexibility to contract in new ways based on the value of these products. Although not all products or services are appropriate for these types of contracts, VBCs could be a part of the solution to address increasing drug prices and overall drug spending. VBCs encompass a variety of different contracting strategies for biopharmaceutical products that do not base payment rates on volume. These contracts instead may include payment on the achievement of specific goals in a predetermined patient population and offer innovative solutions for quantifying and rewarding positive outcomes or otherwise reducing payer risk associated with pharmaceutical costs. To engage national stakeholders in a discussion of current practices, barriers, and potential benefits of VBCs, the Academy of Managed Care Pharmacy (AMCP) convened a Partnership Forum on Advancing Value-Based Contracting in Arlington, Virginia, on June 20-21, 2017. The goals of the VBC forum were as follows: (a) agree to a definition

Online Groups and Patient Forums

OpenAIRE

Dosani, Sabina; Harding, Claire; Wilson, Simon

2014-01-01

Online mental health support forums are becoming increasingly popular and there is evidence that they are useful: particularly for providing anonymous support and filling information gaps. However, there are also very real concerns about negative outcomes for users. One online mental health service, Big White Wall, manages these risks and supports its members through the provision of 24 hour professional moderation. Comparison of Big White Wall’s member population with the population of one L...

IS Research and Policy: Notes From the 2015 ICIS Senior Scholar’s Forum

DEFF Research Database (Denmark)

Niederman, Fred; Applegate, Lynda; Beck, Roman

2017-01-01

Based on the International Conference on Information Systems’ (ICIS) 2015 senior scholars’ forum, we provide insights on the role and opportunities of IS researchers in shaping policy.......Based on the International Conference on Information Systems’ (ICIS) 2015 senior scholars’ forum, we provide insights on the role and opportunities of IS researchers in shaping policy....

Getting Started with The Math Forum Problems of the Week Library. Teacher's Guide

Science.gov (United States)

Math Forum @ Drexel, 2009

2009-01-01

The Math Forum Problems of the Week Library is designed to leverage the power of interactive technology to hold student interest while increasing their success as strategic thinkers. The Math Forum Library is an online source of non-routine challenges in which problem solving and mathematical communication are key elements of every problem. This…

Online stroke forum as source of data for qualitative research: insights from a comparison with patients' interviews.

Science.gov (United States)

Jamison, James; Sutton, Stephen; Mant, Jonathan; De Simoni, Anna

2018-03-30

To determine the appropriateness of an online forum compared with face-to-face interviews as a source of data for qualitative research on adherence to secondary prevention medications after stroke. A comparison of attributes of two data sources, interviews and a forum, using realistic evaluation; a comparison of themes around adherence according to the Perceptions and Practicalities Approach (PAPA) framework. Interviews were conducted in UK GP practices in 2013 and 2014; online posts were written by UK stroke survivors and family members taking part in the online forum of the Stroke Association between 2004 and 2011. 42 interview participants: 28 stroke survivors (age range 61-92 years) and 14 caregivers (85% spouses). 84 online forum participants: 49 stroke survivors (age range 32-72 years) and 33 caregivers (60% sons/daughters). 10 attributes were identified within the two data sources and categorised under three domains (context, mechanisms and outcomes). Participants' characteristics of forum users were often missing. Most forum participants had experienced a stroke within the previous 12 months, while interviewees had done so 1-5 years previously.All interview themes could be matched with corresponding themes from the forum. The forum yielded three additional themes: influence of bad press on taking statins, criticisms of clinicians' prescribing practices and caregiver burden in assisting with medications and being advocates for survivors with healthcare professionals. An online forum is an appropriate source of data for qualitative research on patients' and caregivers' issues with adherence to secondary prevention stroke medications and may offer additional insights compared with interviews, which can be attributed to differences in the approach to data collection. © Article author(s) (or their employer(s) unless otherwise stated in the text of the article) 2018. All rights reserved. No commercial use is permitted unless otherwise expressly granted.

Online stroke forum as source of data for qualitative research: insights from a comparison with patients’ interviews

Science.gov (United States)

Jamison, James; Sutton, Stephen; Mant, Jonathan; De Simoni, Anna

2018-01-01

Objective To determine the appropriateness of an online forum compared with face-to-face interviews as a source of data for qualitative research on adherence to secondary prevention medications after stroke. Design A comparison of attributes of two data sources, interviews and a forum, using realistic evaluation; a comparison of themes around adherence according to the Perceptions and Practicalities Approach (PAPA) framework. Setting Interviews were conducted in UK GP practices in 2013 and 2014; online posts were written by UK stroke survivors and family members taking part in the online forum of the Stroke Association between 2004 and 2011. Participants 42 interview participants: 28 stroke survivors (age range 61–92 years) and 14 caregivers (85% spouses). 84 online forum participants: 49 stroke survivors (age range 32–72 years) and 33 caregivers (60% sons/daughters). Results 10 attributes were identified within the two data sources and categorised under three domains (context, mechanisms and outcomes). Participants’ characteristics of forum users were often missing. Most forum participants had experienced a stroke within the previous 12 months, while interviewees had done so 1–5 years previously. All interview themes could be matched with corresponding themes from the forum. The forum yielded three additional themes: influence of bad press on taking statins, criticisms of clinicians’ prescribing practices and caregiver burden in assisting with medications and being advocates for survivors with healthcare professionals. Conclusions An online forum is an appropriate source of data for qualitative research on patients’ and caregivers’ issues with adherence to secondary prevention stroke medications and may offer additional insights compared with interviews, which can be attributed to differences in the approach to data collection. PMID:29602848

Three-fluid, three-dimensional magnetohydrodynamic solar wind model with eddy viscosity and turbulent resistivity

Energy Technology Data Exchange (ETDEWEB)

Usmanov, Arcadi V.; Matthaeus, William H. [Department of Physics and Astronomy, University of Delaware, Newark, DE 19716 (United States); Goldstein, Melvyn L., E-mail: arcadi.usmanov@nasa.gov [Code 672, NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States)

2014-06-10

We have developed a three-fluid, three-dimensional magnetohydrodynamic solar wind model that incorporates turbulence transport, eddy viscosity, turbulent resistivity, and turbulent heating. The solar wind plasma is described as a system of co-moving solar wind protons, electrons, and interstellar pickup protons, with separate energy equations for each species. Numerical steady-state solutions of Reynolds-averaged solar wind equations coupled with turbulence transport equations for turbulence energy, cross helicity, and correlation length are obtained by the time relaxation method in the corotating with the Sun frame of reference in the region from 0.3 to 100 AU (but still inside the termination shock). The model equations include the effects of electron heat conduction, Coulomb collisions, photoionization of interstellar hydrogen atoms and their charge exchange with the solar wind protons, turbulence energy generation by pickup protons, and turbulent heating of solar wind protons and electrons. The turbulence transport model is based on the Reynolds decomposition and turbulence phenomenologies that describe the conversion of fluctuation energy into heat due to a turbulent cascade. In addition to using separate energy equations for the solar wind protons and electrons, a significant improvement over our previous work is that the turbulence model now uses an eddy viscosity approximation for the Reynolds stress tensor and the mean turbulent electric field. The approximation allows the turbulence model to account for driving of turbulence by large-scale velocity gradients. Using either a dipole approximation for the solar magnetic field or synoptic solar magnetograms from the Wilcox Solar Observatory for assigning boundary conditions at the coronal base, we apply the model to study the global structure of the solar wind and its three-dimensional properties, including embedded turbulence, heating, and acceleration throughout the heliosphere. The model results are

Modeling and Control of VSC based DC Connection for Active Stall Wind Farms to Grid

DEFF Research Database (Denmark)

Iov, Florin; Sorensen, Poul; Hansen, Anca-Daniela

2005-01-01

Currently, there is an increasing trend to connect large MW wind farms to the transmission system. Therefore the power system becomes more vulnerable and dependent on the wind energy production. At the same time requirements that focus on the influence of the farms on the grid stability and power...... quality, and on the control capabilities of wind farms have already been established. The main trends of modem wind turbines/farms are clearly the variable speed operation and a grid connection through a power electronic interface, especially using doubly-fed induction generators. Using power electronics...... the control capabilities of these wind turbines/farms are extended and thus the grid requirements are fulfilled. However, the traditional squirrel-cage generators based wind turbines/wind farms directly connected to the grid does not have such control capabilities. They produce maximum possible power...

Modelling and Control of VSC based DC Connection for Active Stall Wind Farms to Grid

DEFF Research Database (Denmark)

Iov, Florin; Sørensen, Poul; Hansen, Anca Daniela

2006-01-01

Currently, there is an increasing trend to connect large MW wind farms to the transmission system. Therefore the power system becomes more vulnerable and dependent on the wind energy production. At the same time requirements that focus on the influence of the farms on the grid stability and power...... quality, and on the control capabilities of wind farms have already been established. The main trends of modern wind turbines/farms are clearly the variable speed operation and a grid connection through a power electronic interface, especially using doubly-fed induction generators. Using power electronics...... the control capabilities of these wind turbines/farms are extended and thus the grid requirements are fulfilled.  However, the traditional squirrel-cage generators based wind turbines/wind farms directly connected to the grid does not have such control capabilities. They produce maximum possible power...

UK Nuclear Science Forum. Progress report: Data studies during 2000

International Nuclear Information System (INIS)

Nichols, A.L.

2001-06-01

The UK Nuclear Science Forum (UKNSF) now meets once per year to discuss issues of direct relevance to forum members, and to review nuclear data for application in the UK nuclear industry. Links are also maintained through the year, mainly through e-mail and the normal postal system. Work of immediate interest includes the measurement and evaluation of decay data (e.g., half-lives and gamma-ray emission probabilities), fission yields and thermal neutron cross sections; all known UK studies in 2000 are summarised in this document. Specific applications and international links of relevance in the field of nuclear data are also described

The distribution of waves in the inner magnetosphere as a function of solar wind parameters

Science.gov (United States)

Aryan, Homayon; Balikhin, Michael A.; Agapitov, Oleksiy; Krasnoselskikh, Vladimir; Yearby, Keith

Energetic electrons within the Earth’s radiation belts represent a serious hazard to geostationary satellites. The interactions of electrons with chorus waves play an important role in both the acceleration and loss of radiation belt electrons. Studies of the evolution of energetic electron fluxes rely heavily on numerical codes in order to model energy and pitch angle diffusion due to electron interaction with plasma waves in the frame of quasilinear approximation. Application of these codes requires knowledge of statistical wave models to present wave distributions in the magnetosphere. A number of such models are based on CRESS, Cluster, THEMIS and other mission data. These models present wave distributions as a function of L-shell, magnetic local time, magnetic latitude and geomagnetic activity expressed by geomagnetic indices (Kp or Ae). However, it has been shown by G. Reeves and co-authors that only 50% of geomagnetic storms increase flux of relativistic electrons at GEO while 20% cause a decrease. This emphasizes the importance of including solar wind parameters in addition to geomagnetic indices. The present study examines almost four years (01, January, 2004 to 29, September, 2007) of STAFF (Spatio-Temporal Analysis of Field Fluctuation) data from Double Star TC1 combined with geomagnetic indices and solar wind parameters from OMNI database in order to present a comprehensive model of chorus wave intensities as a function of L-shell, magnetic local time, magnetic latitude, geomagnetic indices and solar wind parameters. The results show that chorus emission is not only sub-storm dependent but also dependent upon solar wind parameters with solar wind velocity evidently the most influential solar wind parameter. The largest peak intensities are observed for lower band chorus during active conditions, high solar wind velocity, low density and high pressure.

A kinetic study of solar wind electrons

International Nuclear Information System (INIS)

Lie-Svendsen, Oeystein; Leer, Egil

1996-01-01

The evolution of the distribution function for a test population of electrons in an isothermal electron-proton corona has been studied using a Fokker-Planck description. The aim is to investigate whether a suprathermal tail forms due to the energy dependence of the Coulomb cross section. We find that a Maxwellian test population, injected into this background close to the coronal base with a temperature equal to that of the background electrons, maintains its shape throughout the transition from collision-dominated to collisionless flow. No significant suprathermal tail in the electron distribution function is seen in the outer corona

The tourist function in a car factory Audi Forum Ingolstadt example

Directory of Open Access Journals (Sweden)

Cudny Waldemar

2016-09-01

Full Text Available The article presents modern car industry and tourism issues. It is a case study of a multifunctional centre - the Audi Forum Ingolstadt, situated next to a large Audi factory in Ingolstadt, Germany. It was created in order to promote the Audi brand and provide service for the customers picking up their cars in Ingolstadt. It also performs tourist functions as it focuses on providing service for the people who arrive to visit the car factory, the Audi museum mobile and the region. The centre offers specific tourist products based on particular experiences, which may be included in industrial tourism. The facilities in the Audi Forum Ingolstadt are tourist assets in themselves; they may also be seen as tourist infrastructure. It is also a place where numerous events are held, attracting tourists. The Audi Forum Ingolstadt is an example of a multifunctional centre with distinctive tourist functions, situated on the premises of a large modern car factory.

Proceedings of a public forum on environmental protection criteria for radioactive wastes

International Nuclear Information System (INIS)

1978-05-01

Three topics were discussed at this forum: (1) what is radioactive waste; (2) what are the characteristics of an adequate risk assessment and of acceptable risks from radioactive waste; and (3) what control measures should be undertaken for radioactive wastes. This document includes statements of issues and objectives of Working Groups I, II, and III; responses of forum participants; conclusions of working groups; and prepared statements from the public

Voltage regulation and power losses reduction in a wind farm integrated MV distribution network

Science.gov (United States)

Fandi, Ghaeth; Igbinovia, Famous Omar; Tlusty, Josef; Mahmoud, Rateb

2018-01-01

A medium-voltage (MV) wind production system is proposed in this paper. The system applies a medium-voltage permanent magnet synchronous generator (PMSG) as well as MV interconnection and distribution networks. The simulation scheme of an existing commercial electric-power system (Case A) and a proposed wind farm with a gearless PMSG insulated gate bipolar transistor (IGBT) power electronics converter scheme (Case B) is compared. The analyses carried out in MATLAB/Simulink environment shows an enhanced voltage profile and reduced power losses, thus, efficiency in installed IGBT power electronics devices in the wind farm. The resulting wind energy transformation scheme is a simple and controllable medium voltage application since it is not restrained by the IGBT power electronics voltage source converter (VSC) arrangement. Active and reactive power control is made possible with the aid of the gearless PMSG IGBT power converters.

Classification via Clustering for Predicting Final Marks Based on Student Participation in Forums

Science.gov (United States)

Lopez, M. I.; Luna, J. M.; Romero, C.; Ventura, S.

2012-01-01

This paper proposes a classification via clustering approach to predict the final marks in a university course on the basis of forum data. The objective is twofold: to determine if student participation in the course forum can be a good predictor of the final marks for the course and to examine whether the proposed classification via clustering…

Additional acceleration of solar-wind particles in current sheets of the heliosphere

Directory of Open Access Journals (Sweden)

V. Zharkova

2015-04-01

Full Text Available Particles of fast solar wind in the vicinity of the heliospheric current sheet (HCS or in a front of interplanetary coronal mass ejections (ICMEs often reveal very peculiar energy or velocity profiles, density distributions with double or triple peaks, and well-defined streams of electrons occurring around or far away from these events. In order to interpret the parameters of energetic particles (both ions and electrons measured by the WIND spacecraft during the HCS crossings, a comparison of the data was carried out with 3-D particle-in-cell (PIC simulations for the relevant magnetic topology (Zharkova and Khabarova, 2012. The simulations showed that all the observed particle-energy distributions, densities, ion peak velocities, electron pitch angles and directivities can be fitted with the same model if the heliospheric current sheet is in a status of continuous magnetic reconnection. In this paper we present further observations of the solar-wind particles being accelerated to rather higher energies while passing through the HCS and the evidence that this acceleration happens well before the appearance of the corotating interacting region (CIR, which passes through the spacecraft position hours later. We show that the measured particle characteristics (ion velocity, electron pitch angles and the distance at which electrons are turned from the HCS are in agreement with the simulations of additional particle acceleration in a reconnecting HCS with a strong guiding field as measured by WIND. A few examples are also presented showing additional acceleration of solar-wind particles during their passage through current sheets formed in a front of ICMEs. This additional acceleration at the ICME current sheets can explain the anticorrelation of ion and electron fluxes frequently observed around the ICME's leading front. Furthermore, it may provide a plausible explanation of the appearance of bidirectional "strahls" (field-aligned most energetic

Discussion forum on electron beam instruments AERE Harwell

International Nuclear Information System (INIS)

Bainbridge, J.E.

1980-08-01

The purpose of this catalogue is to provide a source of information on the equipment available at AERE Harwell, to the nuclear and non-nuclear scientist. The original aim, that is, is to provide data on electron/proton beam instruments has been revised to include optical devices and ancillary preparatory equipment. The intention is to enable prospective users to have a contact who can provide further detailed information, although it must be recognised that work on certain projects completely fills the time available. This publication has been updated, first catalogue published in January 1975, to August 1980 and it is the intention that it should form part of a similar publication which incorporates details of similar equipment available throughout the UKAEA. (author)

Bisexual Safe Space(s) on the Internet: Analysis of an Online Forum for Bisexuals

NARCIS (Netherlands)

Maliepaard, E.M.

2017-01-01

Discussions on bisexual safe space(s) and online bisexual spaces are limited. This paper explores the potential of an online forum for bisexuals, their partners, and people who are interested in bisexuality to function as an online safe space. To understand whether the analysed forum is successful

Food science symposium: a national food irradiation forum

International Nuclear Information System (INIS)

Anon.

1989-01-01

A national food irradiation forum was held to further promote the use of irradiation for food applications. This offered opportunity for the Department of National Health to announce new legislation for the labelling of irradiated foodstuffs. Subjects which dominated the proceedings included the implementation of labelling legislation and consumer education; cost implications and commercialisation of radurisation; the increasing trend towards the radurisation of processed foodstuffs as opposed to fresh and the future of food irradiation in South Africa. The safety of the irradiation process was stressed. The forum came to the conclusion that South Africa has this technology which has the government's stamp of approval and it is now up to the food industry, the Consumer Council, etc., to educate consumers into realising that they are buying quality products - and that the Radura symbol is a symbol of quality

RECONSTRUCTING THE SOLAR WIND FROM ITS EARLY HISTORY TO CURRENT EPOCH

Energy Technology Data Exchange (ETDEWEB)

Airapetian, Vladimir S.; Usmanov, Arcadi V., E-mail: vladimir.airapetian@nasa.gov, E-mail: avusmanov@gmail.com [NASA Goddard Space Flight Center, Greenbelt, MD (United States)

2016-02-01

Stellar winds from active solar-type stars can play a crucial role in removal of stellar angular momentum and erosion of planetary atmospheres. However, major wind properties except for mass-loss rates cannot be directly derived from observations. We employed a three-dimensional magnetohydrodynamic Alfvén wave driven solar wind model, ALF3D, to reconstruct the solar wind parameters including the mass-loss rate, terminal velocity, and wind temperature at 0.7, 2, and 4.65 Gyr. Our model treats the wind thermal electrons, protons, and pickup protons as separate fluids and incorporates turbulence transport, eddy viscosity, turbulent resistivity, and turbulent heating to properly describe proton and electron temperatures of the solar wind. To study the evolution of the solar wind, we specified three input model parameters, the plasma density, Alfvén wave amplitude, and the strength of the dipole magnetic field at the wind base for each of three solar wind evolution models that are consistent with observational constrains. Our model results show that the velocity of the paleo solar wind was twice as fast, ∼50 times denser and 2 times hotter at 1 AU in the Sun's early history at 0.7 Gyr. The theoretical calculations of mass-loss rate appear to be in agreement with the empirically derived values for stars of various ages. These results can provide realistic constraints for wind dynamic pressures on magnetospheres of (exo)planets around the young Sun and other active stars, which is crucial in realistic assessment of the Joule heating of their ionospheres and corresponding effects of atmospheric erosion.

RECONSTRUCTING THE SOLAR WIND FROM ITS EARLY HISTORY TO CURRENT EPOCH

International Nuclear Information System (INIS)

Airapetian, Vladimir S.; Usmanov, Arcadi V.

2016-01-01

Stellar winds from active solar-type stars can play a crucial role in removal of stellar angular momentum and erosion of planetary atmospheres. However, major wind properties except for mass-loss rates cannot be directly derived from observations. We employed a three-dimensional magnetohydrodynamic Alfvén wave driven solar wind model, ALF3D, to reconstruct the solar wind parameters including the mass-loss rate, terminal velocity, and wind temperature at 0.7, 2, and 4.65 Gyr. Our model treats the wind thermal electrons, protons, and pickup protons as separate fluids and incorporates turbulence transport, eddy viscosity, turbulent resistivity, and turbulent heating to properly describe proton and electron temperatures of the solar wind. To study the evolution of the solar wind, we specified three input model parameters, the plasma density, Alfvén wave amplitude, and the strength of the dipole magnetic field at the wind base for each of three solar wind evolution models that are consistent with observational constrains. Our model results show that the velocity of the paleo solar wind was twice as fast, ∼50 times denser and 2 times hotter at 1 AU in the Sun's early history at 0.7 Gyr. The theoretical calculations of mass-loss rate appear to be in agreement with the empirically derived values for stars of various ages. These results can provide realistic constraints for wind dynamic pressures on magnetospheres of (exo)planets around the young Sun and other active stars, which is crucial in realistic assessment of the Joule heating of their ionospheres and corresponding effects of atmospheric erosion

Physics-based Tests to Identify the Accuracy of Solar Wind Ion Measurements: A Case Study with the Wind Faraday Cups

Science.gov (United States)

Kasper, J. C.; Lazarus, A. J.; Steinberg, J. T.; Ogilvie, K. W.; Szabo, A.

2006-01-01

We present techniques for comparing measurements of velocity, temperature, and density with constraints imposed by the plasma physics of magnetized bi-Maxwellian ions. Deviations from these physics-based constraints are interpreted as arising from measurement errors. Two million ion spectra from the Solar Wind Experiment Faraday Cup instruments on the Wind spacecraft are used as a case study. The accuracy of velocity measurements is determined by the fact that differential flow between hydrogen and helium should be aligned with the ambient magnetic field. Modeling the breakdown of field alignment suggests velocity uncertainties are less than 0.16% in magnitude and 3deg in direction. Temperature uncertainty is found by examining the distribution of observed temperature anisotropies in high-beta solar wind intervals where the firehose, mirror, and cyclotron microinstabilities should drive the distribution to isotropy. The presence of a finite anisotropy at high beta suggests overall temperature uncertainties of 8%. Hydrogen and helium number densities are compared with the electron density inferred from observations of the local electron plasma frequency as a function of solar wind speed and year. We find that after accounting for the contribution of minor ions, the results are consistent with a systematic offset between the two instruments of 34%. The temperature and density methods are sensitive to non-Maxwellian features such as heat flux and proton beams and as a result are more suited to slow solar wind where these features are rare. These procedures are of general use in identifying the accuracy of observations from any solar wind ion instrument.

Forum, Round Table and Vinegar: Managing the Cellulose Acetate Microfilm Challenge

OpenAIRE

Clive Field

2005-01-01

This final paper from CAMF 2005 is intended to provide some kind of synthesis and commentary on the Forum, plus an update on the third International Round Table on Preservation Microfilm (hereafter referred to simply as the Round Table) which took place, and which I chaired, the day before. In offering these concluding reflections on the Forum, I hope to give a sense of the ways in which the agenda for tackling the cellulose acetate microfilm challenge around the world can be, and is being, t...

Turbulent Structure Under Short Fetch Wind Waves

Science.gov (United States)

2015-12-01

maximum 200 words ) Momentum transfer from wind forcing into the ocean is complicated by the presence of surface waves. Wind momentum and energy are...1,520 m from the mouth of the river to the deployment site ). Map created in Google Earth, October 12, 2015, http://www.google.com/earth/. 33...Doppler processing electronics for each transducer uses 14 bit analog to digital converter to digitize the 1.2 MHz acoustic frequency from the four

The annual GIS-forum in Kharkiv: tasks, thematics and indicators of development in 2012-2017

Directory of Open Access Journals (Sweden)

Олена Сінна

2017-09-01

Full Text Available The article represents the experience of organizing the international conference “GIS-forum”, which is annually held at V.N. Karazin Kharkiv National University. The main purpose of GIS-forum in 2012-2017 was to establish a constructive dialogue between distributors of software, geodata and GIS-services, providers of the equipment used in the GIS-industry, potential consumers of products, scientists, academicians who work in the field of GIS technologies, and future GIS specialists. The format of GIS-forum includes different types of events (reports, equipment exhibition, master classes, seminars, round tables, student projects contest which gives the opportunities to different specialists in geoinformatics, remote sensing, geodesy and related industries to present their interests, to discuss current state and prospects of geoinformatics development in Ukraine and the world, to assess the state of geoinformation services market, as well as the need for specialists and the requirements for their training. An important aspect of the forum is the possibility to participate both full-time, and in a remote form, which is provided by webinar broadcasting. This makes it possible to significantly expand geography of the participants. The forum was attended by representatives from the USA, Spain, Portugal, Slovakia, Estonia, Armenia, Kazakhstan, Russia, Belarus, and of course - from different cities of Ukraine (in different years, which took part in the forum either in full-time or a distance form. The key modern principles of GIS-forum organization are: integration of education, science and production in GIS-industry for the solution of common problems; democratic and flexible financial policies of the event; modernity, innovation, interdisciplinarity; teamwork to achieve goals. The expediency and success of such events are determined by the ever-growing need for training highly qualified GIS specialists, in which all participants in the process

Analysis of counter flow of corona wind for heat transfer enhancement

Science.gov (United States)

Shin, Dong Ho; Baek, Soo Hong; Ko, Han Seo

2018-03-01

A heat sink for cooling devices using the counter flow of a corona wind was developed in this study. Detailed information about the numerical investigations of forced convection using the corona wind was presented. The fins of the heat sink using the counter flow of a corona wind were also investigated. The corona wind generator with a wire-to-plate electrode arrangement was used for generating the counter flow to the fin. The compact and simple geometric characteristics of the corona wind generator facilitate the application of the heat sink using the counter flow, demonstrating the heat sink is effective for cooling electronic devices. Parametric studies were performed to analyze the effect of the counter flow on the fins. Also, the velocity and temperature were measured experimentally for the test mock-up of the heat sink with the corona wind generator to verify the numerical results. From a numerical study, the type of fin and its optimal height, length, and pitch were suggested for various heat fluxes. In addition, the correlations to calculate the mass of the developed heat sink and its cooling performance in terms of the heat transfer coefficient were derived. Finally, the cooling efficiencies corresponding to the mass, applied power, total size, and noise of the devices were compared with the existing commercial central processing unit (CPU) cooling devices with rotor fans. As a result, it was confirmed that the heat sink using the counter flow of the corona wind showed appropriate efficiencies for cooling electronic devices, and is a suitable replacement for the existing cooling device for high power electronics.

Proceedings of the FNCA workshop on application of electron accelerator

International Nuclear Information System (INIS)

Yoshii, Fumio; Kume, Tamikazu

2003-02-01

'Forum for Nuclear Cooperation in Asia (FNCA) Workshop on Application of Electron Accelerator' was sponsored by the Ministry of Education, Culture, Sports, Science and Technology (MEXT) and hosted by Japan Atomic Energy Research Institute (JAERI) and Japan Atomic Industry Forum (JAIF). It was held at the Takasaki Radiation Chemistry Research Establishment (TRCRE), JAERI, Takasaki, Japan from 28 January to 1 February, 2002. The Workshop was attended by experts on application of electron accelerator from each of the participating countries, i.e. China, Indonesia, Korea, Malaysia, The Philippines, Thailand and Vietnam and 16 participants from Japan. A total of 17 papers including invited papers on the current status of application of electron accelerator in the participating countries were presented. The characteristics of various kinds of electron accelerators were introduced. Current research and development on the utilization radiation processing for natural rubber latex, natural polymer solution, polymer films, sterilization of spices and seeds, radiation treatment of flue gases and dioxin in liquid, solid, and gases were reported. Based on the proposed needs from the participating countries, the work plan was discussed and agreed on application of electron accelerator for liquid and for solid (thin films and granules/powder). All manuscripts submitted by every speaker were included in the proceedings. The 16 of the presented papers are indexed individually. (J.P.N.)

Proceedings of the FNCA workshop on application of electron accelerator

Energy Technology Data Exchange (ETDEWEB)

Yoshii, Fumio; Kume, Tamikazu (eds.) [Japan Atomic Energy Research Inst., Takasaki, Gunma (Japan). Takasaki Radiation Chemistry Research Establishment

2003-02-01

'Forum for Nuclear Cooperation in Asia (FNCA) Workshop on Application of Electron Accelerator' was sponsored by the Ministry of Education, Culture, Sports, Science and Technology (MEXT) and hosted by Japan Atomic Energy Research Institute (JAERI) and Japan Atomic Industry Forum (JAIF). It was held at the Takasaki Radiation Chemistry Research Establishment (TRCRE), JAERI, Takasaki, Japan from 28 January to 1 February, 2002. The Workshop was attended by experts on application of electron accelerator from each of the participating countries, i.e. China, Indonesia, Korea, Malaysia, The Philippines, Thailand and Vietnam and 16 participants from Japan. A total of 17 papers including invited papers on the current status of application of electron accelerator in the participating countries were presented. The characteristics of various kinds of electron accelerators were introduced. Current research and development on the utilization radiation processing for natural rubber latex, natural polymer solution, polymer films, sterilization of spices and seeds, radiation treatment of flue gases and dioxin in liquid, solid, and gases were reported. Based on the proposed needs from the participating countries, the work plan was discussed and agreed on application of electron accelerator for liquid and for solid (thin films and granules/powder). All manuscripts submitted by every speaker were included in the proceedings. The 16 of the presented papers are indexed individually. (J.P.N.)

Absence of the strahl during times of slow wind

Directory of Open Access Journals (Sweden)

C. Gurgiolo

2017-01-01

Full Text Available It is not uncommon during periods when the solar wind speed is less than 425 km s−1 to observe near 1 AU no evidence of a strahl population in either the electron solar wind or within the foreshock. Estimating the fluid flow within each energy step returned from the Plasma Electron And Current Experiment (PEACE on board Cluster-2 often finds that in slow wind the GSE spherical flow angles in energies above where there is a clear core/halo signature are often close to radial with no evidence of a field-aligned flow. This signifies the lack of a strahl presence in the electron velocity distribution function (eVDF. When there is no obvious strahl signature in the data, the electrons above the core/halo in energy appear to be unstructured and smeared in angle. This can either be interpreted as due to statistical noise in low counting rate situations or the result of intense scattering. Regions where the strahl is seen and not seen are often separated by a very thin boundary layer. These transitions in the spacecraft frame of reference can be quite rapid, generally occurring within one to two spins (4–8 s.

Self-Powered Wind Sensor System for Detecting Wind Speed and Direction Based on a Triboelectric Nanogenerator.

Science.gov (United States)

Wang, Jiyu; Ding, Wenbo; Pan, Lun; Wu, Changsheng; Yu, Hua; Yang, Lijun; Liao, Ruijin; Wang, Zhong Lin

2018-04-24

The development of the Internet of Things has brought new challenges to the corresponding distributed sensor systems. Self-powered sensors that can perceive and respond to environmental stimuli without an external power supply are highly desirable. In this paper, a self-powered wind sensor system based on an anemometer triboelectric nanogenerator (a-TENG, free-standing mode) and a wind vane triboelectric nanogenerator (v-TENG, single-electrode mode) is proposed for simultaneously detecting wind speed and direction. A soft friction mode is adopted instead of a typical rigid friction for largely enhancing the output performance of the TENG. The design parameters including size, unit central angle, and applied materials are optimized to enhance sensitivity, resolution, and wide measurement scale. The optimized a-TENG could deliver an open-circuit voltage of 88 V and short-circuit current of 6.3 μA, corresponding to a maximum power output of 0.47 mW (wind speed of 6.0 m/s), which is capable of driving electronics for data transmission and storage. The current peak value of the a-TENG signal is used for analyzing wind speed for less energy consumption. Moreover, the output characteristics of a v-TENG are further explored, with six actual operation situations, and the v-TENG delivers fast response to the incoming wind and accurately outputs the wind direction data. As a wind sensor system, wind speed ranging from 2.7 to 8.0 m/s can be well detected (consistent with a commercial sensor) and eight regular directions can be monitored. Therefore, the fabricated wind sensor system has great potential in wireless environmental monitoring applications.

RETHINKING STAKEHOLDER ENGAGEMENT AND TECHNOLOGY ACCESS IN HEALTH TECHNOLOGY ASSESSMENT: REACTIONS TO POLICY FORUM DISCUSSIONS.

Science.gov (United States)

Sampietro-Colom, Laura; Thomas, Sarah

2016-01-01

The need to progress and innovate in health technology assessment (HTA) is a must in a continuously changing environment. The HTAi Policy Forum reflected on two specific areas for development where it was thought there was need for careful consideration and deliberation during the main annual meeting in February 2016. The study by Husereau et al. (1) in this journal presents the discussions resulting from this Forum. To further share the deliberations of the Forum and with a view to opening this debate to the wider HTA community, a panel session during the HTAi Annual Meeting in Tokyo was organized. Presentations at the panel included a summary of the HTAi Policy Forum discussions and perspectives from a patient, a representative of healthcare system provider, and a representative from an HTA organization and industry. This letter presents the issues raised in the panel session.

Analysis of chats on French internet forums about drugs and pregnancy.

Science.gov (United States)

Palosse-Cantaloube, Lucie; Lacroix, Isabelle; Rousseau, Vanessa; Bagheri, Haleh; Montastruc, Jean-Louis; Damase-Michel, Christine

2014-12-01

Some pregnant women use the internet to search for medical information. However, online information is not controlled. The objectives were to describe French online chats about drugs and pregnancy and evaluate the quality and reliability of information shared by internet users. This French descriptive study was performed in November 2012. In order to identify drugs and pregnancy-related forum websites, we used three French key words: forum, pregnancy and drug. We explored the first 10 websites from the search result. Diseases were described using the International Classification of Diseases and drugs classified with the Anatomical Therapeutic Chemical codes and the FDA risk classification. We selected 115 questions that were mainly posted by pregnant internet users in French forums. Drugs raising questions were mostly "nervous system," "anti-infective for systemic use" and "respiratory system" drugs. The risk during pregnancy for nearly half of these drugs had not been evaluated properly. Health professionals were only involved in 7% of the 214 answers. Internet users advised to take a drug in 21% of their answers. Thirty-four percent of those recommended drugs had not been well-evaluated or were potentially at risk during pregnancy. Finally, 12% of the answers could be at risk for pregnant woman. This study shows that information related to drugs and pregnancy in online chats could be at risk for pregnant women. Internet users must be aware that online forums are not reliable sources of information. Copyright © 2014 John Wiley & Sons, Ltd.

Papers submitted to the international forum ''one decade after Chernobyl: nuclear safety aspects''. Working material

International Nuclear Information System (INIS)

1996-01-01

The objective of the forum is to review the remedial measures taken since the Chernobyl accident for improving the safety of RBMK reactors and the Chernobyl containment structure (sarcophagus). The forum will also serve to exchange information on national, bilateral and multilateral efforts for the enhancement of RBMK safety. The conclusions and recommendations will serve as a basis for a background paper to be prepared for presentation, by the forum chairman, at the International Conference ''One decade after Chernobyl'' to held in Vienna from 8-12 April 1996. Refs, figs, tabs

Geopressure industrial forums, newsletter and lease support. Final report, April 7, 1981-December 31, 1983

Energy Technology Data Exchange (ETDEWEB)

Knutson, C.F.

1983-12-01

In the course of this contract C. K. GeoEnergy: (1) planned, organized, conducted, and reported on six DOE/Industry Forum meetings where the progress of DOE's resource development program was outlined and discussed (these six forum meetings included three meetings of the Drilling and Testing Subgroup and three meetings of the Overview Group), (2) prepared and distributed 15 newsletters, and (3) prepared three reports for DOE lease support. This final report includes summaries of each of the forum meetings as well as the three lease support meetings and the newsletter program.

First Session of the Sant Cugat Forum on Astrophysics

CERN Document Server

Rea, Nanda; High-Energy Emission from Pulsars and their Systems

2011-01-01

The aim of the inaugural meeting of the Sant Cugat Forum on Astrophysics was to address, in a global context, the current understanding of and challenges in high-energy emissions from isolated and non-isolated neutron stars, and to confront the theoretical picture with observations of both the Fermi satellite and the currently operating ground-based Cherenkov telescopes. Participants have also discussed the prospects for possible observations with planned instruments across the multi-wavelength spectrum (e.g. SKA, LOFAR, E-VLT, IXO, CTA) and how they will impact our theoretical understanding of these systems. In keeping with the goals of the Forum, this book not only represents the proceedings of the meeting, but also a reflection on the state-of-the-art in the topic.

The Offshore New European Wind Atlas

Science.gov (United States)

Karagali, I.; Hahmann, A. N.; Badger, M.; Hasager, C.; Mann, J.

2017-12-01

The New European Wind Atlas (NEWA) is a joint effort of research agencies from eight European countries, co-funded under the ERANET Plus Program. The project is structured around two areas of work: development of dynamical downscaling methodologies and measurement campaigns to validate these methodologies, leading to the creation and publication of a European wind atlas in electronic form. This atlas will contain an offshore component extending 100 km from the European coasts. To achieve this, mesoscale models along with various observational datasets are utilised. Scanning lidars located at the coastline were used to compare the coastal wind gradient reproduced by the meso-scale model. Currently, an experimental campaign is occurring in the Baltic Sea, with a lidar located in a commercial ship sailing from Germany to Lithuania, thus covering the entire span of the south Baltic basin. In addition, satellite wind retrievals from scatterometers and Synthetic Aperture Radar (SAR) instruments were used to generate mean wind field maps and validate offshore modelled wind fields and identify the optimal model set-up parameters.The aim of this study is to compare the initial outputs from the offshore wind atlas produced by the Weather & Research Forecasting (WRF) model, still in pre-operational phase, and the METOP-A/B Advanced Scatterometer (ASCAT) wind fields, reprocessed to stress equivalent winds at 10m. Different experiments were set-up to evaluate the model sensitivity for the various domains covered by the NEWA offshore atlas. ASCAT winds were utilised to assess the performance of the WRF offshore atlases. In addition, ASCAT winds were used to create an offshore atlas covering the years 2007 to 2016, capturing the signature of various spatial wind features, such as channelling and lee effects from complex coastal topographical elements.

Forum, Round Table and Vinegar: Managing the Cellulose Acetate Microfilm Challenge

Directory of Open Access Journals (Sweden)

Clive Field

2005-08-01

Full Text Available This final paper from CAMF 2005 is intended to provide some kind of synthesis and commentary on the Forum, plus an update on the third International Round Table on Preservation Microfilm (hereafter referred to simply as the Round Table which took place, and which I chaired, the day before. In offering these concluding reflections on the Forum, I hope to give a sense of the ways in which the agenda for tackling the cellulose acetate microfilm challenge around the world can be, and is being, taken forward.

Discussing the risks and benefits of homebirths on online health forums

DEFF Research Database (Denmark)

Fage-Butler, Antoinette Mary

2016-01-01

are considered valuable informational currency. An aspect raised on online patient forums where knowledge and support are very valuable relates to pregnant women’s decisions regarding the choice of homebirth as opposed to hospital birth, particularly due to women’s concerns that homebirths, while preferable......?” It uses a combination of Foucauldian discourse analysis (Willig 2013) and Luhmannian semantic analysis (Andersen 2003) to explore the discursive construction of the risks and gains of homebirth on two open access online forums. Whilst the findings reflect women’s acknowledgement of ongoing political...

Harmonic Instability Source Identification in Large Wind Farms

DEFF Research Database (Denmark)

Ebrahimzadeh, Esmaeil; Blaabjerg, Frede; Wang, Xiongfei

2017-01-01

A large-scale power electronics based power system like a wind farm introduces the passive and active impedances. The interactions between the active and passive impedances can lead to harmonic-frequency oscillations above the fundamental frequency, which can be called harmonic instability....... This paper presents an approach to identify which wind turbine and which bus has more contribution to the harmonic instability problems. In the approach, a wind farm is modeled as a Multi-Input Multi-Output (MIMO) dynamic system. The poles of the MIMO transfer matrix are used to predict the system...... instability and the eigenvalues sensitivity analysis in respect to the elements of the MIMO matrix locates the most influencing buses of the wind farm. Time-domain simulations in PSCAD software environment for a 400-MW wind farm validate that the presented approach is an effective tool to determine the main...

SUPRATHERMAL ELECTRON STRAHL WIDTHS IN THE PRESENCE OF NARROW-BAND WHISTLER WAVES IN THE SOLAR WIND

Energy Technology Data Exchange (ETDEWEB)

Kajdič, P. [Instituto de Geofísica, Universidad Nacional Autónoma de México, Mexico City (Mexico); Alexandrova, O.; Maksimovic, M.; Lacombe, C. [LESIA, Observatoire de Paris, PSL Research University, CNRS, UPMC UniversitéParis 06, Université Paris-Diderot, 5 Place Jules Janssen, F-92190 Meudon (France); Fazakerley, A. N., E-mail: primoz@geofisica.unam.mx [Mullard Space Science Laboratory, University College London (United Kingdom)

2016-12-20

We perform the first statistical study of the effects of the interaction of suprathermal electrons with narrow-band whistler mode waves in the solar wind (SW). We show that this interaction does occur and that it is associated with enhanced widths of the so-called strahl component. The latter is directed along the interplanetary magnetic field away from the Sun. We do the study by comparing the strahl pitch angle widths in the SW at 1 AU in the absence of large scale discontinuities and transient structures, such as interplanetary shocks, interplanetary coronal mass ejections, stream interaction regions, etc. during times when the whistler mode waves were present and when they were absent. This is done by using the data from two Cluster instruments: Spatio Temporal Analysis of Field Fluctuations experiment (STAFF) data in the frequency range between ∼0.1 and ∼200 Hz were used for determining the wave properties and Plasma Electron And Current Experiment (PEACE) data sets at 12 central energies between ∼57 eV (equivalent to ∼10 typical electron thermal energies in the SW, E{sub T}) and ∼676 eV (∼113 E{sub T}) for pitch angle measurements. Statistical analysis shows that, during the intervals with the whistler waves, the strahl component on average exhibits pitch angle widths between 2° and 12° larger than during the intervals when these waves are not present. The largest difference is obtained for the electron central energy of ∼344 eV (∼57 ET).

SUPRATHERMAL ELECTRON STRAHL WIDTHS IN THE PRESENCE OF NARROW-BAND WHISTLER WAVES IN THE SOLAR WIND

International Nuclear Information System (INIS)

Kajdič, P.; Alexandrova, O.; Maksimovic, M.; Lacombe, C.; Fazakerley, A. N.

2016-01-01

We perform the first statistical study of the effects of the interaction of suprathermal electrons with narrow-band whistler mode waves in the solar wind (SW). We show that this interaction does occur and that it is associated with enhanced widths of the so-called strahl component. The latter is directed along the interplanetary magnetic field away from the Sun. We do the study by comparing the strahl pitch angle widths in the SW at 1 AU in the absence of large scale discontinuities and transient structures, such as interplanetary shocks, interplanetary coronal mass ejections, stream interaction regions, etc. during times when the whistler mode waves were present and when they were absent. This is done by using the data from two Cluster instruments: Spatio Temporal Analysis of Field Fluctuations experiment (STAFF) data in the frequency range between ∼0.1 and ∼200 Hz were used for determining the wave properties and Plasma Electron And Current Experiment (PEACE) data sets at 12 central energies between ∼57 eV (equivalent to ∼10 typical electron thermal energies in the SW, E T ) and ∼676 eV (∼113 E T ) for pitch angle measurements. Statistical analysis shows that, during the intervals with the whistler waves, the strahl component on average exhibits pitch angle widths between 2° and 12° larger than during the intervals when these waves are not present. The largest difference is obtained for the electron central energy of ∼344 eV (∼57 ET).

EUROSAFE forum 2013. Safe disposal of nuclear waste

Energy Technology Data Exchange (ETDEWEB)

NONE

2013-07-01

The proceedings of the EUROSAFE forum 2013 - safe disposal of nuclear waste include contributions to the following topics: Nuclear installation safety - assessment; nuclear installation safety - research; waste and decommissioning - dismantling; radiation protection, 3nvironment and emergency preparedness; security of nuclear installations and materials.

Assessing Army Professional Forums Metrics for Effectiveness and Impact

National Research Council Canada - National Science Library

Cianciolo, Anna T; Heiden, Charles G; Prevou, Michael I

2006-01-01

... meet the challenges brought on by Army transformation. Army professional forums (APFs), powered by advances in collaborative toolsets and multimedia presentation software, provide a means for leader self-development and professional growth...

75 FR 23263 - Alta Wind I, LLC; Alta Wind II, LLC; Alta Wind III, LLC; Alta Wind IV, LLC; Alta Wind V, LLC...

Science.gov (United States)

2010-05-03

... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Docket No. EL10-62-000] Alta Wind I, LLC; Alta Wind II, LLC; Alta Wind III, LLC; Alta Wind IV, LLC; Alta Wind V, LLC; Alta Wind VI, LLC; Alta Wind VII, LLC; Alta Wind VIII, LLC; Alta Windpower Development, LLC; TGP Development Company, LLC...

77 FR 29633 - Alta Wind VII, LLC, Alta Wind IX, LLC, Alta Wind X, LLC, Alta Wind XI, LLC, Alta Wind XII, LLC...

Science.gov (United States)

2012-05-18

... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Docket No. EL12-68-000] Alta Wind VII, LLC, Alta Wind IX, LLC, Alta Wind X, LLC, Alta Wind XI, LLC, Alta Wind XII, LLC, Alta Wind XIII, LLC, Alta Wind XIV, LLC, Alta Wind XV, LLC, Alta Windpower Development, LLC, TGP Development Company, LLC...

Korea-France Forum on New Technologies for Energy

International Nuclear Information System (INIS)

Chang, Jong Hwa; Shin, Young Joon; Kim, Yong Wan

2007-07-01

In celebration of the 120th anniversary on Korea-France diplomatic relations, both Korea and France agreed that the New-generation Energy Forum on a VHTR-assisted nuclear hydrogen production, renewable energy, and bio-fuel should be held in Paries, France. In accordance with the agreement, the Korea-France Forum on New Technologies for Energy organized by KAERI and CEA was held at the Mercure Hotel Conference Hall in Paries for a couple of days, November 6 and 7 and a facility visit to the CEA-Saclay was arranged on November 8 by the French side. 19 scientists from both countries presented their R and D status and plans in 4 technical sessions of 'VHTR Nuclear System', 'VHTR-assited Hydrogen Production', 'Renewable Energy', and 'Fuel Cell and Energy Storage'. A contact point in each field was established for the exchange of technological information and dispatch of experts if necessary

Thermal Loading and Lifetime Estimation for Power Device Considering Mission Profiles in Wind Power Converter

DEFF Research Database (Denmark)

Ma, Ke; Liserre, Marco; Blaabjerg, Frede

2015-01-01

for the reliability improvement and also for cost reduction of wind power technology. Unfortunately, the existing lifetime estimation methods for the power electronic converter are not yet suitable in the wind power application, because the comprehensive mission profiles are not well specified and included......As a key component in the wind turbine system, the power electronic converter and its power semiconductors suffer from complicated power loadings related to environment, and are proven to have high failure rates. Therefore, correct lifetime estimation of wind power converter is crucial...... devices, more detailed information of the lifetime-related performance in wind power converter can be obtained. Some experimental results are also included to validate the thermal behavior of power device under different mission profiles....

IAEA scientific forum 2005. Nuclear science: Physics helping the world. Book of extended synopses

International Nuclear Information System (INIS)

2005-01-01

The Scientific forum held during the 49th Regular Session of the IAEA General Conference covered the following topics: meeting energy needs, developing advanced materials and technologies, advancing radiation medicine and supporting nuclear safety. This publication contains 13 individual papers presented at the scientific forum. Each of the papers was indexed separately

Forum on Specifications and Design Languages 2012

CERN Document Server

2014-01-01

This book brings together a selection of the best papers from the fifteenth edition of the Forum on specification and Design Languages Conference (FDL), which was held in September 2012 at Vienna University of Technology, Vienna, Austria.  FDL is a well-established international forum devoted to dissemination of research results, practical experiences and new ideas in the application of specification, design and verification languages to the design, modeling and verification of integrated circuits, complex hardware/software embedded systems, and mixed-technology systems.  ·         Covers Assertion Based Design, Verification & Debug; ·         Includes language-based modeling and design techniques for embedded systems; ·         Covers design, modeling and verification of mixed physical domain and mixed signal systems that include significant analog parts in electrical and non-electrical domains; ·         Includes formal and semi-formal system level design methods fo...

Short-Circuit Current Analysis for DFIG Wind Farm Considering the Action of a Crowbar

Directory of Open Access Journals (Sweden)