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1

ANESTESIA EN CIRUGÍA UROLÓGICA Y EN LA INSUFICIENCIA RENAL  

Microsoft Academic Search

o Técnicas quirúrgicas o Evaluación preoperatorio o Consideraciones anatómicas o Anestesia regional o Posiciones en cirugía urológica o Cirugía endoscopica o Cirugía a cielo abierto: Riñón, Uréteres, Próstata, Vesical o Litotricia o Laparoscopia en urología o Láser en urología o Anestesia en la insuficiencia renal

Antonio Villalonga; Josep Trueta

2

EM International. Volume 1  

SciTech Connect

It is the intent of EM International to describe the Office of Environmental Restoration and Waste Management`s (EM`s) various roles and responsibilities within the international community. Cooperative agreements and programs, descriptions of projects and technologies, and synopses of visits to international sites are all highlighted in this semiannual journal. Focus on EM programs in this issue is on international collaboration in vitrification projects. Technology highlights covers: in situ sealing for contaminated sites; and remote sensors for toxic pollutants. Section on profiles of countries includes: Arctic contamination by the former Soviet Union, and EM activities with Germany--cooperative arrangements.

Not Available

1993-07-01

3

EMS in the pueblos.  

PubMed

Imagine creating a movie by excerpting scenes from "Dances With Wolves," splicing it with footage from "Code 3" or "Emergency Response" and then flavoring the script with the mystery of a Tony Hillerman novel. A film producer would probably find it quite difficult to choreograph a finished product from such a compilation of material. To hundreds of Native American EMS providers, however, such a movie is played out every day in Indian country. And with this movie come some real-life problems, including trauma, which is the number-one cause of premature death among Native Americans. But a high trauma rate is just one of the challenges facing tribal EMS responders. There's also prolonged response and transport, the problems involved in maintaining the unique culture and standard of care, the challenges of tribal EMS administration and EMS education of Native American students, and the unsure future of Native American EMS. Beyond that, there's the fact that EMS is a s unique to each Indian reservation as are the cultures of the native peoples who reside on these lands. Yet while no two systems are alike, most tribal EMS providers face similar challenges. PMID:10131740

Vigil, M A

1994-02-01

4

Environmental Media Services (EMS)  

NSDL National Science Digital Library

Environmental Media Services (EMS) is a nonprofit communications clearinghouse committed to the expansion of media coverage on critical environmental and public health issues. True to their mission, EMS staff "build relationships with top scientists, physicians, and other experts to bring journalists the latest and most credible information." EMS's modest homepage is free of clutter but full of content. While several sections are under construction and updates (currently) appear irregular, a series of available articles provides useful summaries of important environmental news issues over the past six months. Current articles include "The impacts of global warming on the oceans" and "Cool companies," among others.

5

EM Radiation Program  

NSDL National Science Digital Library

The EM Radiation program displays the electric field vectors (in the x-y plane) and magnetic field contours (for the field in the z direction) calculated from the Lienard-Wiechert potentials for a charged particle. The default scenario shows the resulting radiation from a charged particle in simple harmonic motion. Additional particle trajectories can be specified using the Display | Switch GUI menu item. EM Radiation is an Open Source Physics program written for the teaching of electromagnetism. It is distributed as a ready-to-run (compiled) Java archive. Double clicking the em_radiation.jar file will run the program if Java is installed. Other electromagnetism programs are also available. They can be found by searching ComPADRE for Open Source Physics, OSP, or electromagnetism.

Christian, Wolfgang

2008-05-20

6

The EM Earthquake Precursor  

NASA Astrophysics Data System (ADS)

Many attempts have been made to determine a sound forecasting method regarding earthquakes and warn the public in turn. Presently, the animal kingdom leads the precursor list alluding to a transmission related source. By applying the animal-based model to an electromagnetic (EM) wave model, various hypotheses were formed, but the most interesting one required the use of a magnetometer with a differing design and geometry. To date, numerous, high-end magnetometers have been in use in close proximity to fault zones for potential earthquake forecasting; however, something is still amiss. The problem still resides with what exactly is forecastable and the investigating direction of EM. After the 1989 Loma Prieta Earthquake, American earthquake investigators predetermined magnetometer use and a minimum earthquake magnitude necessary for EM detection. This action was set in motion, due to the extensive damage incurred and public outrage concerning earthquake forecasting; however, the magnetometers employed, grounded or buried, are completely subject to static and electric fields and have yet to correlate to an identifiable precursor. Secondly, there is neither a networked array for finding any epicentral locations, nor have there been any attempts to find even one. This methodology needs dismissal, because it is overly complicated, subject to continuous change, and provides no response time. As for the minimum magnitude threshold, which was set at M5, this is simply higher than what modern technological advances have gained. Detection can now be achieved at approximately M1, which greatly improves forecasting chances. A propagating precursor has now been detected in both the field and laboratory. Field antenna testing conducted outside the NE Texas town of Timpson in February, 2013, detected three strong EM sources along with numerous weaker signals. The antenna had mobility, and observations were noted for recurrence, duration, and frequency response. Next, two directional techniques were employed, resulting in three mapped, potential epicenters. The remaining, weaker signals presented similar directionality results to more epicentral locations. In addition, the directional results of the Timpson field tests lead to the design and construction of a third prototype antenna. In a laboratory setting, experiments were created to fail igneous rock types within a custom-designed Faraday Cage. An antenna emplaced within the cage detected EM emissions, which were both reproducible and distinct, and the laboratory results paralleled field results. With a viable system and continuous monitoring, a fracture cycle could be established and observed in real-time. Sequentially, field data would be reviewed quickly for assessment; thus, leading to a much improved earthquake forecasting capability. The EM precursor determined by this method may surpass all prior precursor claims, and the general public will finally receive long overdue forecasting.

Jones, K. B., II; Saxton, P. T.

2013-12-01

7

Carcinoma espinocelular cutâneo em cães.  

E-print Network

??Dissertação de Mestrado Integrado em Medicina Veterinária O Carcinoma Espinocelular (CEC) é uma neoplasia com origem nos queratinócitos e representa aproximadamente 5% das neoplasias cutâneas… (more)

Moura, Inês da Costa

2012-01-01

8

Identified EM Earthquake Precursors  

NASA Astrophysics Data System (ADS)

Many attempts have been made to determine a sound forecasting method regarding earthquakes and warn the public in turn. Presently, the animal kingdom leads the precursor list alluding to a transmission related source. By applying the animal-based model to an electromagnetic (EM) wave model, various hypotheses were formed, but the most interesting one required the use of a magnetometer with a differing design and geometry. To date, numerous, high-end magnetometers have been in use in close proximity to fault zones for potential earthquake forecasting; however, something is still amiss. The problem still resides with what exactly is forecastable and the investigating direction of EM. After a number of custom rock experiments, two hypotheses were formed which could answer the EM wave model. The first hypothesis concerned a sufficient and continuous electron movement either by surface or penetrative flow, and the second regarded a novel approach to radio transmission. Electron flow along fracture surfaces was determined to be inadequate in creating strong EM fields, because rock has a very high electrical resistance making it a high quality insulator. Penetrative flow could not be corroborated as well, because it was discovered that rock was absorbing and confining electrons to a very thin skin depth. Radio wave transmission and detection worked with every single test administered. This hypothesis was reviewed for propagating, long-wave generation with sufficient amplitude, and the capability of penetrating solid rock. Additionally, fracture spaces, either air or ion-filled, can facilitate this concept from great depths and allow for surficial detection. A few propagating precursor signals have been detected in the field occurring with associated phases using custom-built loop antennae. Field testing was conducted in Southern California from 2006-2011, and outside the NE Texas town of Timpson in February, 2013. The antennae have mobility and observations were noted for recurrence, duration, and frequency response. At the Southern California field sites, one loop antenna was positioned for omni-directional reception and also detected a strong First Schumann Resonance; however, additional Schumann Resonances were absent. At the Timpson, TX field sites, loop antennae were positioned for directional reception, due to earthquake-induced, hydraulic fracturing activity currently conducted by the oil and gas industry. Two strong signals, one moderately strong signal, and approximately 6-8 weaker signals were detected in the immediate vicinity. The three stronger signals were mapped by a biangulation technique, followed by a triangulation technique for confirmation. This was the first antenna mapping technique ever performed for determining possible earthquake epicenters. Six and a half months later, Timpson experienced two M4 (M4.1 and M4.3) earthquakes on September 2, 2013 followed by a M2.4 earthquake three days later, all occurring at a depth of five kilometers. The Timpson earthquake activity now has a cyclical rate and a forecast was given to the proper authorities. As a result, the Southern California and Timpson, TX field results led to an improved design and construction of a third prototype antenna. With a loop antenna array, a viable communication system, and continuous monitoring, a full fracture cycle can be established and observed in real-time. In addition, field data could be reviewed quickly for assessment and lead to a much more improved earthquake forecasting capability. The EM precursors determined by this method appear to surpass all prior precursor claims, and the general public will finally receive long overdue forecasting.

Jones, Kenneth, II; Saxton, Patrick

2014-05-01

9

College of Engineering EM Engineering Mechanics  

E-print Network

College of Engineering EM Engineering Mechanics KEY: # = new course * = course changed = course or concur: MA 213. EM 302 MECHANICS OF DEFORMABLE SOLIDS. (3 of Engineering or consent of chairperson, and EM 221; prereq or concur: MA 214. EM 313 DYNAMICS. (3

MacAdam, Keith

10

Investimento ambiental em indústrias sujas e intensivas em recursos naturais e energia  

Microsoft Academic Search

O crescimento industrial brasileiro, a partir do final dos anos setenta, ocorreu com o aumento da participação de indústrias intensivas em recursos naturais, em detrimento da participação de indústrias intensivas em trabalho e dos setores intensivos em atividades tecnológicas mais complexas. Essas transformações, tornando o setor de bens intermediários dominante na estrutura industrial, implicaram em consideráveis mudanças tanto de ordem

Frederico Cavadas Barcellos; Jurandir Carlos de Oliveira; Paulo Gonzaga Mibielli de Carvalho

2009-01-01

11

Turismo Náutico em Angra dos Reis – RJ : a sustentabilidade em questão.  

E-print Network

??Dissertação (mestrado)—Universidade de Brasília, Centro de Desenvolvimento Sustentável, 2011. O turismo está em franca expansão e se desenvolvendo a taxas bastante significativas no Brasil. Em… (more)

Medeiros, Márcio Bastos

2011-01-01

12

Populações estelares em galáxias HII  

NASA Astrophysics Data System (ADS)

Analisamos o conteúdo estelar de 74 galáxias HII a partir do contínuo observado nos espectros ópticos dessas galáxias, utilizando métodos de síntese de população estelar. Descobrimos que todas as galáxias para as quais encontramos soluções contêm uma população estelar velha que domina a massa estelar, e numa maioria dessas também encontramos evidência de uma população de idade intermediaria além da geração jovem que está se formando agora. Concluímos que a formação estelar dessas galáxias se realiza em surtos individuais, Esses surtos são interrompidos por longos períodos de inatividade, com os primeiros consumindo a maior parte do gás. Sugerimos, portanto, que as galáxias HII sejam galáxias anãs normais flagradas em um período de surto.

Westera, P.; Cuisinier, F.; Telles, E.; Kehrig, C.

2003-08-01

13

Burning the EMS candle. EMS shifts and worker fatigue.  

PubMed

Has coffee become your best friend? Do you sleep only in your dreams? Is your bed merely an illusion? If so, you are not alone; sleep deprivation is a fact of life for many EMS personnel. Though widely accepted, isn't it time that we question the effects of those long days and nights? PMID:10116022

McCallion, R; Fazackerley, J

1991-10-01

14

Programa de Ps-Graduao em Economia  

E-print Network

1 Programa de Pós-Graduação em Economia PPG-ECO Universidade de Brasília UnB UNIVERSIDADE DE BRASÍLIA PROGRAMA DE P�S-GRADUA��O EM ECONOMIA EDITAL No. 1/2014 SELE��O DE CANDIDATOS �S VAGAS DO PROGRAMA DE P�S-GRADUA��O EM ECONOMIA PARA O CURSO DE MESTRADO PROFISSIONAL EM ECONOMIA ­ ÁREA DE CONCENTRA��O

Maier, Rudolf Richard

15

WRF-EMS Aviation Products  

NSDL National Science Digital Library

This lesson illustrates how numerical guidance from the Weather Research and Forecasting Model - Environmental Modeling System (WRF-EMS) can be added to surface observations, satellite graphics, and conceptual models of important aviation phenomena, to produce TAFs. Specifically, the lesson describes how visibility, cloud ceilings, and the flight categories variables provide values for aviation forecasts in Africa.

Comet

2013-09-25

16

The European Mobile System (EMS)  

NASA Technical Reports Server (NTRS)

The European Space Agency is presently procuring an L band payload in order to promote a regional European L band system coping with the specific needs of the European market. The payload, and the two communications systems to be supported, are described below. The potential market for EMS in Europe is discussed.

Jongejans, A.; Rogard, R.; Mistretta, I.; Ananasso, F.

1993-01-01

17

Angus Robichaud's Reel G Em D A Bm D7  

E-print Network

Angus Robichaud's Reel 4 4 D G A D D G A D 3 3 G Em D A Bm D7 3 3 G Em D A D Animas Reel Bernie Waugh 4 4 3 3 G D G Bm Em C Am C D G D G Bm Em C Am D G The Arkansas Traveler 4 2 D G A D Em A 3D G A D Em G A D D G D A Bm Em A D G D A Em G A D #12;Asher Rodney Miller 4 4 D Em F#m G A D Em G A D A D1 2

Doyle, Peter

18

Angus Robichaud's Reel G Em D A Bm D7  

E-print Network

Angus Robichaud's Reel 4 4 D G A D D G A D 3 3 G Em D A Bm D7 3 3 G Em D A D Animas Reel Bernie Waugh 4 4 3 3 G D G Bm Em C Am C D G D G Bm Em C Am D G The Arkansas Traveler 4 2 D G A D Em A 3 D G A D Em G A D D G D A Bm Em A D G D A Em G A D #12; Asher Rodney Miller 4 4 D Em F#m G A D Em G A D A D 1

Doyle, Peter

19

DEPARTAMENTO DE ECONOMIA MESTRADO EM ECONOMIA  

E-print Network

DEPARTAMENTO DE ECONOMIA MESTRADO EM ECONOMIA EDITAL DE CONVOCA��O ­ 2014 Estão abertas as inscrições para o Mestrado em Economia da PUC-Rio, a iniciar-se em janeiro de 2014. Para candidatos residentes no Brasil: A admissão é feita através do Exame Nacional de Economia, organizado pela ANPEC

20

DEPARTAMENTO DE ECONOMIA DOUTORADO EM ECONOMIA  

E-print Network

DEPARTAMENTO DE ECONOMIA DOUTORADO EM ECONOMIA EDITAL DE CONVOCA��O ­ 2014 Estão abertas as inscrições para o Doutorado em Economia da PUC-Rio, a iniciar-se em janeiro de 2014. O período de inscrições ]: Departamento de Economia [ref.: Candidatura ao Doutorado] Pontifícia Universidade Católica do Rio de Janeiro

21

Lietuvos teritorijos žem?s plutos deformacij? ir seismotektoninio potencialo ryšys  

NASA Astrophysics Data System (ADS)

Lietuvoje yra statini?, kelian?i? ekologinio pavojaus gr?sm? (Ignalinos atomin? elektrin?, Mažeiki? naftos perdirbimo ?mon?, chemijos gamyklos Jonavoje bei K?dainiuose ir pan.). Seisminiai ?vykiai gali sutrikdyti ši? ?moni? veikl? ir net lemti didel? pavoj? aplinkai, t. y. gali b?ti sukelta didel? aplinkos tarša chemin?mis bei radioaktyviosiomis medžiagomis. Seisminius ?vykius lemia teritorijos seismotektoninis potencialas. Seismotektoninis potencialas ir Žem?s plutos deformacijos yra tarpusavyje susij? rei\\vskiniai, kuriuos sukelia dažnai tie patys giluminiai procesai Žem?s gelm?se. Žem?s plutos deformacij? tyrimas yra vienas iš informacijos šaltini? prognozuojant teritorijos seismotektonin? aktyvum?. Straipsnyje nagrin?jamos Žem?s plutos horizontaliosios deformacijos, nustatomi Žem?s plutos ?tempi? poky?iai Lietuvos teritorijoje pagal GPS matavim? duomenis. Atlikus tyrimus pagal pateikiam? Žem?s plutos horizontali?j? deformacij? ir ?tempi? tyrimo metodik?, gauti nauji horizontali?j? deformacij? charakteristik? bei ?tempi? poky?i? rezultatai ir nustatytos j? s?sajos su seismotektoniniu potencialu.

Zakarevi?ius, Algimantas; Stanionis, Arminas; Levinskait?, Daiva

2010-01-01

22

7 CFR 1945.20 - Making EM loans available.  

Code of Federal Regulations, 2012 CFR

...2012-01-01 false Making EM loans available. 1945.20 Section 1945.20 Agriculture Regulations of the Department...CONTINUED) EMERGENCY Disaster Assistance-General § 1945.20 Making EM loans available. EM...

2012-01-01

23

School Budget Hold'em Facilitator's Guide  

ERIC Educational Resources Information Center

"School Budget Hold'em" is a game designed to help school districts rethink their budgeting process. It evolved out of Education Resource Strategies' (ERS) experience working with large urban districts around the country. "School Budget Hold'em" offers a completely new approach--one that can turn the budgeting process into a long-term visioning…

Education Resource Strategies, 2012

2012-01-01

24

EMS communications development: History and commentary  

Microsoft Academic Search

The history of emergency medical services (EMS) communication systems development from the FCC's first allocation of frequencies for hospitals and ambulances up to the present is discussed. Up until the late 1960's EMS communication systems were virtually nonexistent. Most early networks were developed by hospital associations for coordination of hospital disaster operations. Many significant changes were seeded in 1966. By

B. A. Smith

1976-01-01

25

EM international activities. February 1997 highlights  

SciTech Connect

EM International Highlights is a brief summary of on-going international projects within the Department of Energy`s Office of Environmental Management (EM). This document contains sections on: Global Issues, activities in Western Europe, activities in central and Eastern Europe, activities in Russia, activities in Asia and the Pacific Rim, activities in South America, activities in North America, and International Organizations.

NONE

1997-02-01

26

Contributo para a caracterização molecular de echinococcus granulosus em Portugal.  

E-print Network

??Mestrado em Ciências Biomédicas, Especialidade de Biologia Molecular em Medicina Tropical e Internacional A Equinococose/hidatidose – doença causada pela fase larvar (hidátide – vulgarmente conhecida… (more)

Beato, Sílvia Filipa Alves

2008-01-01

27

Project X RFQ EM Design  

SciTech Connect

Project X is a proposed multi-MW proton facility at Fermi National Accelerator Laboratory (FNAL). The Project X front-end would consist of an H- ion source, a low-energy beam transport (LEBT), a CW 162.5 MHz radio-frequency quadrupole (RFQ) accelerator, and a medium-energy beam transport (MEBT). Lawrence Berkeley National Laboratory (LBNL) and FNAL collaboration is currently developing the designs for various components in the Project X front end. This paper reports the detailed EM design of the CW 162.5 MHz RFQ that provides bunching of the 1-10 mA H- beam with acceleration from 30 keV to 2.1 MeV.

Romanov, Gennady; /Fermilab; Hoff, Matthew; Li, Derun; Staples, John; Virostek, Steve; /LBNL

2012-05-09

28

EM International, July 1994, Volume 2  

SciTech Connect

The Office of Environmental Management (EM) at the Department of Energy (DOE) is seeking out and leveraging foreign technology, data, and resources in keeping with EM`s mandate to protect public health and the environment through the safe and cost-effective remediation of the Department`s nuclear weapons sites. EM works closely with foreign governments, industry, and universities to obtain innovative environmental technologies, scientific and engineering expertise, and operations experience that will support EM`s objectives. Where appropriate, these international resources are used to manage the more urgent risks at our sites, secure a safe workplace, help build consensus on critical issues, and strengthen our technology development program. Through international agreements EM engages in cooperative exchange of information, technology, and individuals. Currently, we are managing agreements with a dozen countries in Europe, Latin America, and Asia. These agreements focus on environmental restoration, waste management, transportation of radioactive wastes, and decontamination and decommissioning. This publication contains the following articles: in situ remediation integrated program; in-situ characterization and inspection of tanks; multimedia environmental pollutant assessment system (MEPAS); LLNL wet oxidation -- AEA technology. Besides these articles, this publication covers: EU activities with Russia; technology transfer activities; and international organization activities.

Not Available

1994-10-01

29

Kinesiology Undergraduate Student Learning Outcomes (EMS)  

E-print Network

1 Kinesiology Undergraduate Student Learning Outcomes (EMS) Kinesiology Undergraduate Student Learning Outcomes (PE) Kinesiology Graduate Program 1. Students will demonstrate knowledge of and skill sociocultural, historical, and philosophical perspectives on kinesiology. 4. Students will understand how motor

30

Structural Composites with Tuned EM Chirality.  

National Technical Information Service (NTIS)

We have developed and implemented methods to predict the overall EM properties tensors including the coupling tensors based on the geometry and microstructure of an array of scattering elements, and fabricated and measured both the HM and mechanical prope...

S. Nemat-Nasser

2009-01-01

31

Sincronizao em Sistemas Distribudos problemas clssicos  

E-print Network

problema de coordenação distribuída #12;ordenação de mensagens · implementação ­ uso de uma fila de holdback em camada de comunicação chegada de mensagens processamento (aplicação) fila entrega fila holdback destinatário responde com uma proposta de número de ordem ­ e deixa (msg, id_único, num_ordem_proposto) em fila

Rodriguez, Noemi

32

Condições físicas em galáxias HII  

NASA Astrophysics Data System (ADS)

Galáxias HII são galáxias anãs de baixa luminosidade que apresentam alta taxa de formação estelar. Seus espectros são dominados por intensas linhas de emissão devido à fotoionização pela presença de um grande número de estrelas do tipo O e B. Nós apresentamos um catálogo espectrofotométrico de 111 galáxias HII observadas no telescópio 1.52m do ESO com o espectrógrafo Boller & Chivens. Determinamos propriedades estatísticas da amostra e derivamos condições físicas (temperatura eletrônica, densidade eletrônica) e abundâncias químicas. Para algumas galáxias, fomos também capazes de resolver espacialmente regiões de formação estelar individuais e determinar propriedades espectroscópicas para estas regiões separadamente, o que nos permitiu avaliar as flutuações das condições físico-químicas dentro das galáxias HII. Em particular, vimos que apesar das galáxias HII apresentarem formação estelar espalhada ao longo do corpo da galáxia, são objetos quimicamente homogêneos. A fim de estudar a evolução temporal dos objetos durante o tempo de vida das estrelas ionizantes construimos também alguns diagramas relacionando razões de linhas de emissão com a largura equivalente de Hb (EW(Hb)). Para interpretar tais diagramas utilizamos modelos de fotoionização para populações estelares integradas. Concluímos que as galáxias HII não correspondem a simples idéia de um burst instantâneo envolvido por um gás opaco aos fótons ionizantes e com densidade constante. As relações observadas entre razões de linhas e EW(Hb) podem ser melhor compreendidas se as galáxias HII apresentarem populações estelares mais velhas, que contribuem para o contínuo óptico observado.

Kehrig, C.; Telles, E.; Cuisinier, F.

2003-08-01

33

DIVISÃO DE TRABALHO E RELAÇAO DE GÊNERO EM COMUNIDADES AMAZÔNICAS: UMA REALIDADE EM TRANSFORMAÇÃO  

Microsoft Academic Search

As relações de gênero constituem o conjunto das relações sociais e econômicas no universo do trabalho, da cultura e da política. Está organizada a partir dos papéis masculinos e femininos dentro de estruturas que permanecem constantes em algumas sociedades ou de forma presente no inconsciente social que às vezes é refletido em ações do cotidiano colocando cada agente social dentro

Albejamere Pereira de Castro

34

SOFIS FTS EM test results  

NASA Astrophysics Data System (ADS)

The Solar Occultation FTS for Inclined-orbit Satellite (SOFIS) is a solar occultation Fourier transform spectrometer developed by the Ministry of the Environment (MOE) in Japan for the Global Change Observation Mission-A1 (GCOM-A1) satellite. GCOM-A1 will be placed in a 650 km non-sun-synchronous orbit, with an inclination angle of 69 degrees. ABB-Bomem is a sub-contractor of NTSpace (NEC-Toshiba Space) for the design and manufacturing of the FTS Engineering Model of SOFIS. SOFIS measures the vertical profile of the atmospheric constituents with 0.2 cm-1 spectral resolution for the spectral range covering 3-13 ?m. The atmospheric vertical resolution of SOFIS is 1 km. The target of SOFIS measurements is a global distribution of O3, HNO3, NO2, N2O, CH4, H2O, CO2, CFC-11, CFC-12, ClONO2, aerosol extinction, atmospheric pressure and temperature. NTSpace in Japan is the prime contractor of SOFIS. The spectrometer is an adapted version of the classical Michelson interferometer using an optimized optical layout and moving retro-reflectors. A solid-state laser diode operating at 1550 nm is used as metrology source of the interferometer. Its highly folded optical design results in a high performance instrument with a compact size. SOFIS FTS implements high performance control techniques to achieve outstanding speed stability of the moving mechanism. This paper describes the test activities of the SOFIS-FTS Engineering Model (EM) and preliminary results. The performances of the FTS are presented in terms of key parameters like signal-to-noise ratio, modulation efficiency and stability. Spectra acquired are shown and test methodology and analyses are presented. Lessons learned during assembly, integration and testing are described as well as improvements planned to be implemented in the Flight Model.

Soucy, Marc-Andre A.; Levesque, Luc E.; Tanii, Jun; Kawashima, Takahiro; Nakajima, Hideaki

2003-04-01

35

Tour of the Electromagnetic Spectrum (EMS) Videos  

NSDL National Science Digital Library

These videos introduce middle- and high school-age learners to the electromagnetic spectrum. The product consists of 8 animations including an introduction to electromagnetic waves and one animation for each wavelength of the EM spectrum (Radio, Microwave, Infrared, Visible, Ultraviolet, X-Rays and Gamma Rays). Each wavelength of the EM spectrum offers a construct to illustrate and teach about NASA sensors, missions, and science. Emphasis is placed on relevant science, such as lunar exploration, and hot science topics, such as climate change. The examples and narrative for each wavelength animation build on the learnersâ prior knowledge then introduces examples from NASA missions. These examples explore the use of spectral analysis and visualizations that help scientists make discoveries about the world around us using EM waves.

Benesch, Troy

2009-01-01

36

Risk Communication Within the EM Program  

SciTech Connect

The U.S. Department of Energy Environmental Management program (EM) conducts the most extensive environmental remediation effort in the world. The annual EM budgets have exceeded $6,000,000,000 for approximately ten years and EM has assumed responsibility for the cleanup of the largest DOE reservations (i.e., at Hanford, Washington, Aiken, South Carolina, and Idaho Falls, Idaho) as well as the facilities at Rocky Flats, Colorado and in Ohio. Each of these sites has areas of extensive radioactive and chemical contamination, numerous surplus facilities that require decontamination and removal, while some have special nuclear material that requires secure storage. The EM program has been criticized for being ineffective (1) and has been repeatedly reorganized to address perceived shortcomings. The most recent reorganization was announced in 2001 to become effective at the beginning of the 2003 Federal Fiscal Year (i.e., October 2002). It was preceded by a ''top to bottom'' review (TTBR) of the program (2) that identified several deficiencies that were to be corrected as a result of the reorganization. One prominent outcome of the TTBR was the identification of ''risk reduction'' as an organizing principle to prioritize the activities of the new EM program. The new program also sought to accelerate progress by identifying a set of critical activities at each site that could be accelerated and result in more rapid site closure, with attendant risk, cost, and schedule benefits. This paper investigates how the new emphasis on risk reduction in the EM program has been communicated to EM stakeholders and regulators. It focuses on the Rocky Flats Environmental Technology Site (RFETS) as a case study and finds that there is little evidence for a new emphasis on risk reduction in EM communications with RFETS stakeholders. Discussions between DOE and RFETS stakeholders often refer to ''risk,'' but the word serves as a placeholder for other concepts. Thus ''risk'' communication at RFETS is lively and involves important issues, but often does not inform participants about true ''risk reduction.''

Edelson, M.

2003-02-26

37

7 CFR 1945.35 - Special EM loan training.  

Code of Federal Regulations, 2012 CFR

...2012-01-01 false Special EM loan training. 1945.35 Section 1945.35 Agriculture Regulations of the Department...CONTINUED) EMERGENCY Disaster Assistance-General § 1945.35 Special EM loan training. (a)...

2012-01-01

38

7 CFR 1945.35 - Special EM loan training.  

Code of Federal Regulations, 2010 CFR

...2009-01-01 true Special EM loan training. 1945.35 Section 1945.35 Agriculture Regulations of the Department...CONTINUED) EMERGENCY Disaster Assistance-General § 1945.35 Special EM loan training. (a)...

2010-01-01

39

7 CFR 1945.35 - Special EM loan training.  

Code of Federal Regulations, 2011 CFR

...2009-01-01 true Special EM loan training. 1945.35 Section 1945.35 Agriculture Regulations of the Department...CONTINUED) EMERGENCY Disaster Assistance-General § 1945.35 Special EM loan training. (a)...

2011-01-01

40

EM-ONE : an architecture for reflective commonsense thinking  

E-print Network

This thesis describes EM-ONE, an architecture for commonsense thinking capable of reflective reasoning about situations involving physical, social, and mental dimensions. EM-ONE uses as its knowledge base a library of ...

Singh, Pushpinder, 1972-2006.

2005-01-01

41

UNIVERSIDADE DE BRASLIA PROGRAMA DE PS-GRADUAO EM ECONOMIA  

E-print Network

1 UNIVERSIDADE DE BRASÍLIA PROGRAMA DE P�S-GRADUA��O EM ECONOMIA EDITAL No. 04/2011 SELE��O DE CANDIDATOS �S VAGAS DO PROGRAMA DE P�S-GRADUA��O EM ECONOMIA PARA O CURSO DE MESTRADO PROFISSIONAL EM ECONOMIA ­ AREA DE CONCENTRA��O EM GEST�O ECON�MICA DE FINAN�AS P�BLICAS PARA O SEGUNDO PERÍODO LETIVO DE

Lucero, Jorge Carlos

42

UNIVERSIDADE DE BRASLIA PROGRAMA DE PS-GRADUAO EM ECONOMIA  

E-print Network

1 UNIVERSIDADE DE BRASÍLIA PROGRAMA DE P�S-GRADUA��O EM ECONOMIA EDITAL No. 4/2013 SELE��O DE CANDIDATOS �S VAGAS DO PROGRAMA DE P�S-GRADUA��O EM ECONOMIA PARA O CURSO DE MESTRADO PROFISSIONAL EM ECONOMIA ­ AREA DE CONCENTRA��O EM GEST�O ECON�MICA DE FINAN�AS P�BLICAS PARA O SEGUNDO PERÍODO LETIVO DE

Maier, Rudolf Richard

43

UNIVERSIDADE DE BRASLIA PROGRAMA DE PS-GRADUAO EM ECONOMIA  

E-print Network

1 UNIVERSIDADE DE BRASÍLIA PROGRAMA DE P�S-GRADUA��O EM ECONOMIA EDITAL No. 5/2013 SELE��O DE CANDIDATOS �S VAGAS DO PROGRAMA DE P�S-GRADUA��O EM ECONOMIA PARA O CURSO DE MESTRADO PROFISSIONAL EM ECONOMIA ­ AREA DE CONCENTRA��O EM GEST�O ECON�MICA DE FINAN�AS P�BLICAS PARA O SEGUNDO PERÍODO LETIVO DE

Maier, Rudolf Richard

44

Marvin, robô construtor para competição em robótica móvel  

Microsoft Academic Search

renatohsp@gmail .com Resumo: Este artigo é sobre a construção do robô autônomo Marvin o Construtor, que foi construído para participar da IV Competição IEEE Brasileira de Robô. A tarefa consiste em empilhar blocos em uma área predeterminada em um menor tempo possível, ganha a torre mais alta. O robô, construído por alunos do Instituto Tecnológico de Aeronáutica (ITA), foi construído

André Martin Narciso; Carlos Augusto; Bentes da Silva; Jackson Paul Matsuura

45

On Convergence Properties of the EM Algorithm for Gaussian Mixtures  

Microsoft Academic Search

We build up the mathematical connection between the Expectation-Maximization (EM) algorithm and gradient-based approaches for maximum likelihood learning of finite gaussian mixtures. We show that the EM step in parameter space is obtained from the gradient via a projection matrix P, and we provide an explicit expression for the matrix. We then analyze the convergence of EM in terms of

Lei Xu; Michael I. Jordan

1996-01-01

46

GEOBULLETIN NOvEmBEr 15Th  

E-print Network

to hydrothermal convection of groundwater connected to surface water Thermal springs are ubiquitous features whose;GEOBULLETIN NOvEmBEr 15Th 2013 - 2 - hydrothermal convection cells circulating groundwater within the near hydrothermal circulation of groundwater. For example, these requirements are met in many areas within

Carlson, Anders

47

de Ps-Graduao em Enfermagem  

E-print Network

CAPES/PNPD A Profa. Dra Marta Lenise do Prado, docente do Programa de Pós-graduação em Enfermagem da (via e-mail), para agendar uma entrevista para arguição do currículo, considerando o perfil adequado ao

Floeter, Sergio Ricardo

48

EMS response to an airliner crash.  

PubMed

This report of an aircraft crash at a major airport in Kingston, Jamaica examines the response of the local Emergency Medical Services (EMS). Factors that impacted the response are discussed, and the need for more disaster simulation exercises is highlighted. The objective of this case report was to document the response of EMS personnel to the crash of American Airlines Flight 331, and to utilize the information to examine and improve the present protocol. While multiple errors can occur during a mass-casualty event, these can be reduced by frequent simulation exercises during which various personnel practice and learn designated roles. Efficient triage, proper communication, and knowledge of the roles are important in ensuring the best possible outcome. While the triage system and response of the EMS personnel were effective for this magnitude of catastrophe, more work is needed in order to meet predetermined standards. Ways in which this can be overcome include: (1) hosting more disaster simulation exercises; (2) encouraging more involvement with first responders; and (3) strengthening the links in the local EMS system. Vigorous public education must be instituted and maintained. PMID:22853919

Dasgupta, Shuvra; French, Simone; Williams-Johnson, Jean; Hutson, Rhonda; Hart, Nicole; Wong, Mark; Williams, Eric; Espinosa, Kurdell; Maycock, Celeste; Edwards, Romayne; McCartney, Trevor; Cawich, Shamir; Crandon, Ivor

2012-06-01

49

CNMP, CSP, EMS and Writing It Down  

E-print Network

by farmers, leading to... · Increasing importance of "writing it down" #12;Examples.. · NMP, CNMP · PMPOp & plan for more · III - meet all natural resource concerns #12;NMP & CNMP · NMP in WI rules; CNMP and erosion #12;EMS is HQ · CSP, NMP, PMP, CNMP alphabet soup · Are components of an Environmental Management

Balser, Teri C.

50

CURSO DE PS-GRADUAO EM METEOROLOGIA  

E-print Network

CURSO DE P�S-GRADUA��O EM METEOROLOGIA Coordenadora Acadêmica Maria Paulete Pereira Martins Membros Bueno Pereira, Ph.D., W.M.Rice University, 1980 Gilberto Fernando Fisch, Doutor, INPE, 1995 Iracema, INPE, 2002 Maria Paulete Pereira Martins, Doutora, INPE, 1996 Marley Cavalcante de Lima Moscati

51

CURSO DE PS-GRADUAO EM METEOROLOGIA  

E-print Network

CURSO DE P�S-GRADUA��O EM METEOROLOGIA Coordenadora Acadêmica Maria Paulete Pereira Martins Bueno Pereira, Ph.D., W.M.Rice University, 1980 Gilberto Fernando Fisch, Doutor, INPE, 1995 Iracema, INPE, 2002 Maria Paulete Pereira Martins, Doutora, INPE, 1996 Marley Cavalcante de Lima Moscati

52

CURSO DE PS-GRADUAO EM METEOROLOGIA  

E-print Network

CURSO DE P�S-GRADUA��O EM METEOROLOGIA Coordenadora Acadêmica Maria Paulete Pereira Martins-USP, 2002 �nio Bueno Pereira, Ph.D., W.M.Rice University, 1980 Gilberto Fernando Fisch, Doutor, INPE, 1995, INPE, 2002 Maria Paulete Pereira Martins, Doutora, INPE, 1996 Marley Cavalcante de Lima Moscati

53

GEOBULLETIN NOvEmBEr 8Th  

E-print Network

GEOBULLETIN NOvEmBEr 8Th 2013 - 1 - GeoBulletin is distributed weekly, by E-mail. Contributions are requested! If you have a news item, a request, an announcement etc. email it to geodept@geology.wisc.edu or leave it at the office, Room 225 by Noon on Wednesday. WEEKS LECTURE - FALL 2013 Nov. 8 Graham Kent

Carlson, Anders

54

Regional EM studies in the 80's  

NASA Astrophysics Data System (ADS)

The review describes in broad terms the development of regional EM studies during the last five-six years. Large simultaneous magnetometer arrays, broadband and dense profiling with five component instruments, the use of remote reference techniques and in-field data processing have increased both the number and the quality of EM surveys. The increase has been strong all over the world. An extensive list of references, divided geographically, is presented. Selected examples of regional resisitivity-versus-depth curves are shown for Africa, the Baikal region, the Baltic Shield, the Canadian Shield, the Carpathian regions, the Central Andes, Iceland, India, the Juan de Fuca Plate, the Münsterland Basin, the Rio Grande rift, the Scottish Caledonides, the Tasman Sea, and for the United States in general. Because of the influence of tectonic settings and the metamorphic grade of rocks, only qualitative aspects of the results are relevant. ‘Classical’ array studies, especially in Australia, in the Carpathian regions, in India, in North Germany and in Scotland have been reinterpreted and completed with more accurate 2D modelling and dense MT profiling. In the USA and Canada also new regions have been surveyed extensively. New regional EM work has been conducted extensively on the Baltic Shield and in Central and North Africa, Siberia, China, in the areas around the Caspian and Black Seas and in South America. The newest studies are supported by or compared with other geophysical data, which also are used in extrapolating for missing EM data density. There are several successful large-scale projects in operation: the European Geotraverse (EGT), the KAPG International Geotraverses and the EMSLAB project (with its first preliminary results). Regional EM studies have been increasingly applied to geothermal, hydrocarbon and mineral prospecting as well as local structural studies, e.g. studies of sites for nuclear waste disposal.

Hjelt, S. E.

1987-09-01

55

Modelling and design for PM/EM magnetic bearings  

NASA Technical Reports Server (NTRS)

A mathematical model of a permanent magnet/electromagnet (PM/EM) radially active bearing is presented. The bearing is represented by both a reluctance model and a stiffness model. The reluctance model analyzes the magnetic circuit of the PM/EM bearings. By combining the two models, the performance of the bearing can be predicted given geometric dimensions, permanent magnet strength, and the parameters of the EM coils. The overall bearing design including the PM and EM design is subject to the performance requirement and physical constraints. A study of these requirements and constraints is discussed. The PM design is based on the required magnetic flux for proper geometric dimensions and magnet strength. The EM design is based on the stability and force slew rate consideration, and dictates the number of turns for the EM coils and the voltage and current of the power amplifier. An overall PM/EM bearing design methodology is proposed and a case study is also demonstrated.

Pang, D.; Kirk, J. A.; Anand, D. K.; Johnson, R. G.; Zmood, R. B.

1992-01-01

56

The association between EMS workplace safety culture and safety outcomes  

PubMed Central

Objective Prior studies have highlighted wide variation in EMS workplace safety culture across agencies. We sought to determine the association between EMS workplace safety culture scores and patient or provider safety outcomes. Methods We administered a cross-sectional survey to EMS workers affiliated with a convenience sample of agencies. We recruited these agencies from a national EMS management organization. We used the EMS Safety Attitudes Questionnaire (EMS-SAQ) to measure workplace safety culture and the EMS Safety Inventory (EMS-SI), a tool developed to capture self-reported safety outcomes from EMS workers. The EMS-SAQ provides reliable and valid measures of six domains: safety climate, teamwork climate, perceptions of management, perceptions of working conditions, stress recognition, and job satisfaction. A panel of medical directors, paramedics, and occupational epidemiologists developed the EMS-SI to measure self-reported injury, medical errors and adverse events, and safety-compromising behaviors. We used hierarchical linear models to evaluate the association between EMS-SAQ scores and EMS-SI safety outcome measures. Results Sixteen percent of all respondents reported experiencing an injury in the past 3 months, four of every 10 respondents reported an error or adverse event (AE), and 90% reported safety-compromising behaviors. Respondents reporting injury scored lower on 5 of the 6 domains of safety culture. Respondents reporting an error or AE scored lower for 4 of the 6 domains, while respondents reporting safety-compromising behavior had lower safety culture scores for 5 of 6 domains. Conclusions Individual EMS worker perceptions of workplace safety culture are associated with composite measures of patient and provider safety outcomes. This study is preliminary evidence of the association between safety culture and patient or provider safety outcomes. PMID:21950463

Weaver, Matthew D.; Wang, Henry E.; Fairbanks, Rollin J.; Patterson, Daniel

2012-01-01

57

Crosshole EM in steel-cased boreholes  

SciTech Connect

The application of crosshole EM methods through steel well-casing was investigated in theoretical, laboratory and field studies. A numerical code was developed that calculates the attenuation and phase delay of an EM dipole signal propagated through a steel well casing lodged in a homogeneous medium. The code was validated with a scale model and used for sensitivity studies of casing and formation properties. Finally, field measurements were made in an oil field undergoing waterflooding. Our most important findings are that (1) crosshole surveys are feasible using a well pair with one metallic and one non-metallic casing. (2) The casing effect seems be localized within the pipe section that includes the sensor. (3) The effects of the casing can be corrected using simple means and (4) crosshole field data that are sensitive to both formation and casing were acquired in a working environment.

Wilt, M.; Lee, K.H.; Becker, A.; Spies, B.; Wang, B.

1996-07-01

58

Helicopter EMS: Research Endpoints and Potential Benefits  

PubMed Central

Patients, EMS systems, and healthcare regions benefit from Helicopter EMS (HEMS) utilization. This article discusses these benefits in terms of specific endpoints utilized in research projects. The endpoint of interest, be it primary, secondary, or surrogate, is important to understand in the deployment of HEMS resources or in planning further HEMS outcomes research. The most important outcomes are those which show potential benefits to the patients, such as functional survival, pain relief, and earlier ALS care. Case reports are also important “outcomes” publications. The benefits of HEMS in the rural setting is the ability to provide timely access to Level I or Level II trauma centers and in nontrauma, interfacility transport of cardiac, stroke, and even sepsis patients. Many HEMS crews have pharmacologic and procedural capabilities that bring a different level of care to a trauma scene or small referring hospital, especially in the rural setting. Regional healthcare and EMS system's benefit from HEMS by their capability to extend the advanced level of care throughout a region, provide a “backup” for areas with limited ALS coverage, minimize transport times, make available direct transport to specialized centers, and offer flexibility of transport in overloaded hospital systems. PMID:22203905

Thomas, Stephen H.; Arthur, Annette O.

2012-01-01

59

Sequence analysis of two tandemly linked Em genes from wheat  

Microsoft Academic Search

DNA sequences are presented for two members of the wheat Em gene family. The sequences correspond to the two linked genes at the Xem-1AL locus. Comparisons of these sequences with that of another wheat Em gene and two Em cDNA clones reveals substantial homology within the protein-coding regions, and the presence in the 5'-flanking regions of the genomic sequences of

T. Simon Futers; Sertac Onde; Muge Turet; Andrew C. Cuming

1993-01-01

60

Photon kinetic description of 1D relativistic EM pulse solitons  

Microsoft Academic Search

Photon kinetics provides a novel formalism to describe intense EM fields-plasma interactions, where the EM fields are described as a collection of quasi-particles (photons). Photon kinetics provides a better physical picture of the EM fields dynamics, is computionally less demanding, and allows for an easy description of broadband incoherent light pulses. We have developed a 1D photon kinetic code, where

R. Trines; R. Bingham; W. B. Mori; L. O. Silva

2003-01-01

61

UNIVERSIDADE DE BRASLIA PROGRAMA DE PS-GRADUAO EM ECONOMIA  

E-print Network

UNIVERSIDADE DE BRASÍLIA PROGRAMA DE P�S-GRADUA��O EM ECONOMIA EDITAL No. 03/2012 SELE��O DE CANDIDATOS �S VAGAS DO PROGRAMA DE P�S- GRADUA��O EM ECONOMIA PARA O CURSO DE DOUTORADO ACAD�MICO PARA O PRIMEIRO SEMESTRE LETIVO DE 2013 A Coordenação do Programa de Pós-Graduação em Economia da Universidade de

Maier, Rudolf Richard

62

UNIVERSIDADE DE BRASLIA PROGRAMA DE PS-GRADUAO EM ECONOMIA  

E-print Network

1/4 UNIVERSIDADE DE BRASÍLIA PROGRAMA DE P�S-GRADUA��O EM ECONOMIA EDITAL No. 02/2011 SELE��O DE CANDIDATOS �S VAGAS DO PROGRAMA DE P�S-GRADUA��O EM ECONOMIA PARA O CURSO DE DOUTORADO PARA O PRIMEIRO PERÍODO LETIVO DE 2012 1. PRE�MBULO 1.1. O Coordenador do Programa de Pós-Graduação em Economia, no uso de

Maier, Rudolf Richard

63

UNIVERSIDADE DE BRASLIA PROGRAMA DE PS-GRADUAO EM ECONOMIA  

E-print Network

UNIVERSIDADE DE BRASÍLIA PROGRAMA DE P�S-GRADUA��O EM ECONOMIA EDITAL No. 03/2013 SELE��O DE CANDIDATOS �S VAGAS DO PROGRAMA DE P�S- GRADUA��O EM ECONOMIA PARA O CURSO DE DOUTORADO ACAD�MICO PARA O PRIMEIRO SEMESTRE LETIVO DE 2014 PRE�MBULO O Coordenador do Programa de Pós-Graduação em Economia da

Maier, Rudolf Richard

64

UNIVERSIDADE DE BRASLIA PROGRAMA DE PS-GRADUAO EM ECONOMIA  

E-print Network

UNIVERSIDADE DE BRASÍLIA PROGRAMA DE P�S-GRADUA��O EM ECONOMIA EDITAL No. 04/2011 SELE��O DE CANDIDATOS �S VAGAS DO PROGRAMA DE P�S- GRADUA��O EM ECONOMIA PARA O CURSO DE DOUTORADO ACAD�MICO PARA O PRIMEIRO SEMESTRE LETIVO DE 2012 A Coordenação do Programa de Pós-Graduação em Economia da Universidade de

Lucero, Jorge Carlos

65

UNIVERSIDADE DE BRASLIA PROGRAMA DE PS-GRADUAO EM ECONOMIA  

E-print Network

1/4 UNIVERSIDADE DE BRASÍLIA PROGRAMA DE P�S-GRADUA��O EM ECONOMIA EDITAL No. 02/2010 SELE��O DE CANDIDATOS �S VAGAS DO PROGRAMA DE P�S-GRADUA��O EM ECONOMIA PARA O CURSO DE DOUTORADO PARA O PRIMEIRO PERÍODO LETIVO DE 2011 1. PRE�MBULO 1.1. O Coordenador do Programa de Pós-Graduação em Economia, no uso de

Maier, Rudolf Richard

66

UNIVERSIDADE DE BRASLIA PROGRAMA DE PS-GRADUAO EM ECONOMIA  

E-print Network

1/3 UNIVERSIDADE DE BRASÍLIA PROGRAMA DE P�S-GRADUA��O EM ECONOMIA EDITAL No. 01/2011 SELE��O DE CANDIDATOS �S VAGAS DO PROGRAMA DE P�S-GRADUA��O EM ECONOMIA PARA O CURSO DE MESTRADO ACAD�MICO PARA O PRIMEIRO PERÍODO LETIVO DE 2012 1. PRE�MBULO 1.1. O Coordenador do Programa de Pós-Graduação em Economia

Lucero, Jorge Carlos

67

2. HI PAR (ACQUISITION RADAR) TOWER AND ENLISTED MEN (EM) ...  

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

2. HI PAR (ACQUISITION RADAR) TOWER AND ENLISTED MEN (EM) BARRACKS WITH RADAR ATTACHED. - Nike Hercules Missile Battery Summit Site, Battery Control Administration & Barracks Building, Anchorage, Anchorage, AK

68

Propriedades termodinâmicas de um gás ideal em superfícies hiperbólicas compactas.  

E-print Network

??Neste trabalho investigamos algumas propriedades termodinâmicas de gases ideais em superfícies compactas de curvatura constante e negativa. Super- fícies com propriedades similares aparecem, por exemplo,… (more)

Diego de Flôor e Silva

2012-01-01

69

BUSCA LOCAL PARA POS-PROCESSAMENTO EM RESULTADOS DE OTIMIZAC~AO MULTI-OBJETIVO EM REDES DE FILAS  

E-print Network

BUSCA LOCAL PARA P´OS-PROCESSAMENTO EM RESULTADOS DE OTIMIZA¸C~AO MULTI-OBJETIVO EM REDES DE FILAS otimiza¸c~ao de redes de filas finitas, a capacidade total do sistema em ´areas de espera deve ser a menor redistribui¸c~ao de ´areas de circula¸c~ao entre as filas, preservando fixa a capacidade total do sistema. Um

Cruz, Frederico

70

HISTÓRIA, LITERATURA E DITADURA: O CASO JOÃO PAZ EM INCIDENTE EM ANTARES  

Microsoft Academic Search

This article refers to a possible critic of the Brazilian military and dictatorial regime in the 1960´s and 1970s, trough the eyes of João Paz, a character in the novel of Erico Veríssimo, Incidente em Antares . The research, from a bibliographic point of view, has been based on recent theories that relate to facts in the History and Literature

Daniela Freitas Torres; Elaine dos Santos

71

10 CFR Appendixes E-M to Part 52 - [Reserved  

10 Energy 2 2014-01-01 2014-01-01 false [Reserved] E Appendixes E-M to Part 52 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) LICENSES, CERTIFICATIONS, AND APPROVALS FOR NUCLEAR POWER PLANTS Appendixes E-M to Part 52...

2014-01-01

72

Under Review Scaling Down EM Using Graph Based  

E-print Network

a probabilistic model formulation characterized by the parameters of the probability distribution. For example, in the above applications [3, 17] a #12;Scaling Down EM Using Graph Based Models 3 Gaussian distributionUnder Review Scaling Down EM Using Graph Based Models Ian Davidson Department of Computer Science

Davidson, Ian

73

BENJAMIN FRANKLIN E A HISTÓRIA DA ELETRICIDADE EM LIVROS DIDÁTICOS  

Microsoft Academic Search

Introdução Nos últimos anos, a história da ciência vem sendo introduzida em materiais didáticos utilizados em sala de aula. Uma das razões para isso é a pressão de órgãos governamentais, tais como a Secretaria de Educação Básica, responsável pela avaliação destes livros dentro do Programa Nacional de Livros Didáticos para o ens ino fundamental e médio. Os editais destes programas

Cibelle Celestino Silva; Ana Carolina Pimentel

74

Stochastic EM-based TFBS motif discovery with MITSU  

PubMed Central

Motivation: The Expectation–Maximization (EM) algorithm has been successfully applied to the problem of transcription factor binding site (TFBS) motif discovery and underlies the most widely used motif discovery algorithms. In the wider field of probabilistic modelling, the stochastic EM (sEM) algorithm has been used to overcome some of the limitations of the EM algorithm; however, the application of sEM to motif discovery has not been fully explored. Results: We present MITSU (Motif discovery by ITerative Sampling and Updating), a novel algorithm for motif discovery, which combines sEM with an improved approximation to the likelihood function, which is unconstrained with regard to the distribution of motif occurrences within the input dataset. The algorithm is evaluated quantitatively on realistic synthetic data and several collections of characterized prokaryotic TFBS motifs and shown to outperform EM and an alternative sEM-based algorithm, particularly in terms of site-level positive predictive value. Availability and implementation: Java executable available for download at http://www.sourceforge.net/p/mitsu-motif/, supported on Linux/OS X. Contact: a.m.kilpatrick@sms.ed.ac.uk PMID:24931999

Kilpatrick, Alastair M.; Ward, Bruce; Aitken, Stuart

2014-01-01

75

Processamento auditivo e SPECT em crianças com dislexia  

Microsoft Academic Search

RESUMO - Aplicamos em um grupo de 36 crianças os testes dicótico de dígitos, dicótico de dissílabos altern a- dos e dicótico não-verbal, os quais fazem parte do conjunto de avaliação do processamento auditivo. As crianças foram divididas em dois grupos que foram correlacionados: grupo experimental (GE) formado por 18 crianças com diagnóstico de dislexia e 18 crianças normais compondo

Luciane Sauer; Liliane Desgualdo Pereira; Sylvia Maria Ciasca; Magda Pestun; Marilisa M. Guerreiro

2006-01-01

76

Standard Errors for EM Estimates in Generalized Linear Models with  

E-print Network

. As additional covariate among others the temperature was recorded. The bacteria content was determinedStandard Errors for EM Estimates in Generalized Linear Models with Random Effects Herwig Friedl of EM estimates in generalized linear models with random effects. Quadrature formulae are used

Friedl, Herwig

77

A Double Layer Electromagnetic Cloak And GL EM Modeling  

E-print Network

In this paper, we propose a novel electromagnetic (EM) cloaking structure that consists of two annular layers between three spherical shells and model its performance numerically and theoretically by using a Global and Local EM field (GL) method. The two annular layers contain distinct cloaking materials: the outer layer provides invisibility; the inner layer is fully absorbing. The cloaking materials are weakly degenerative. The wavefield from an EM source located outside the cloak propagates as in free space outside the outer shell, never be disturbed by the cloak and does not penetrate into the inner absorbing layer and concealment. The field of a source located inside inner layer or the cloaked concealment is completely absorbed by the inner layer and never reaches the outside of the middle shell, Moreover, the EM wavefield excited in concealment is not disrupted by the cloak. There exists no Maxwell EM wavefield can be excited in a single layer cloaked concealment which is filled by normal material. More...

Xie, Ganquan; Xie, Feng; Xie, Lee

2009-01-01

78

Electromagnetic optimization of EMS-MAGLEV systems  

SciTech Connect

In EMS-MAGLEV high-speed transport systems, devices for propulsion, levitation and contactless on-board electric power transfer are combined in a single electromagnetic structure. The strong coupling among the windings affects the performance of each device and requires the utilization of numerical codes. The paper describes an overall optimization procedure, based on a suitable mathematical model of the system, which takes into account several items of the system performance. The parameters of the model are calculated by an automated sequence of FEM analyses of the configuration. Both the linear generator output characteristics and the propulsion force ripple are improved applying the procedure to a reference configuration. The results are compared with the results obtained by a sequence of partial optimizations operating separately on two different subsets of the geometric parameters.

Andriollo, M.; Martinelli, G.; Morini, A.; Tortella, A. [Univ. of Padova (Italy). Dept. of Electrical Engineering] [Univ. of Padova (Italy). Dept. of Electrical Engineering

1998-07-01

79

DOE EM industry programs robotics development  

SciTech Connect

The Office of Science and Technology (OST) manages an aggressive program for RD&D, as well as testing and evaluation for the U.S. Department of Energy`s (DOE) Environmental Management (EM) organization. The goal is to develop new and improved environmental restoration and waste management technologies to clean up the inventory of the DOE weapons complex faster, safer, and cheaper than is possible with currently available technologies. OST has organized technology management activities along focus teams for each major problem area. There are currently five focus areas: decontamination and decommissioning, tanks, subsurface contaminants, mixed waste, and plutonium. In addition, OST is pursuing research and development (R&D) that cuts across these focus areas by having applications in two or more focus areas. Currently, there are three cross-cutting programs: the robotics technology development; characterization, monitoring, and sensor technologies; and efficient separations and processing.

Staubly, R.; Kothari, V. [Dept. of Energy, Morgantown, WV (United States)

1997-12-01

80

Evaluation of Fracture Azimuth by EM Wave and Elastic Wave  

NASA Astrophysics Data System (ADS)

Fracture system plays an important role in the development of underground energy, for example enhanced geothermal system (EGS), oil shale and shale gas, etc. Therefore, it becomes more and more important to detect and evaluate the fracture system. Geophysical prospecting is an useful method to evaluate the characteristics of the subsurface fractures. Currently, micro-seismology, multi-wave seismic exploration, and electromagnetic (EM) survey are reported to be used for the purpose. We are studying a method using both elastic wave and EM wave to detect and evaluate the fracture azimuth in laboratory. First, we build a 3D horizontal transverse isotropy (HTI) model, shown in the figure 1, by dry parallel fractures system, which was constructed by plexiglass plates and papers. Then, we used the ultrasonic system to obtain reflected S-wave data. Depending on the shear wave splitting, we evaluated the fracture azimuth by the algorithm of Pearson correlation coefficient. In addition, we used the full Polarimetric ultra wide band electromagnetic (FP-UWB-EM) wave System, shown in the figure 2, to obtain full polarimetric reflected EM-wave data. Depending on the rotation of the EM wave polarimetry, we evaluated the fracture azimuth by the the ration between maximum amplitude of co-polarimetric EM wave and maximum amplitude of cross-polarimetric EM wave. Finally, we used both EM-wave data and S-wave data to evaluate the fracture azimuth by the method of cross plot and statistical mathematics. To sum up, we found that FP-UWB-EM wave can be used to evaluated the fracture azimuth and is more accurate than ultrasound wave. Also joint evaluation using both data could improve the precision.

Feng, X.; Wang, Q.; Liu, C.; Lu, Q.; Zeng, Z.; Liang, W.; Yu, Y.; Ren, Q.

2013-12-01

81

Autonomia e Motivação em narrativas de aprendizes de português como língua estrangeira1  

Microsoft Academic Search

Neste artigo, discuto os resultados de minha pesquisa dentro do projeto AMFALE - Autonomia em um Modelo Fractal de Aquisição de Língua Estrangeira. Com base em conceitos de autonomia e motivação e na correlação entre eles, analiso narrativas de aprendizes de português como língua estrangeira em Belo Horizonte. Tais análises atestam que a experiência de aprendizagem inserida em uma comunidade

Fernanda Sousa Carvalho

82

Cultivo hidropônico de lisianto p ara flor de corte em sistema de fluxo laminar de nutrientes  

Microsoft Academic Search

Resumo - O objetivo deste trabalho foi avaliar as características produtivas e comerciais do cultivo de quatro cultivares de lisianto (Eustoma grandiflorum) em três soluções nutritivas em sistema de fluxo laminar de nutrientes (NFT). Utilizou-se o delineamento em blocos casualizados, em esquema fatorial 4x3, com três repetições. Os tratamentos foram compostos de quatro cultivares (Echo Champagne, Mariachi Pure White, Balboa

Alice Antonello; Londero Backes; José Geraldo Barbosa; Paulo Roberto Cecon; José Antonio Saraiva Grossi; Rogério Luiz Backes; Fernando Luiz Finger; Av. P. H. Rolfs

83

EM 9043 October 2011 Growing Farms: Successful Whole  

E-print Network

of the Oregon State University Extension Service Small Farms Program (http://smallfarms.oregonstate.edu) #12 ................................................................5 SWOT Analysis...............................................................7 Resource InventoryEM 9043 · October 2011 Growing Farms: Successful Whole Farm Management Planning Book Think It

Tullos, Desiree

84

Genética de populações e relações de parentesco em Ciconiiformes (Aves).  

E-print Network

??Estudos de genética de populações e de parentesco genético foram desenvolvidos em colhereiro (Platalea ajaja), cabeça-seca (Mycteria americana) e garça-branca-grande (Ardea alba egretta), de colônias… (more)

Carolina Isabel Miño

2010-01-01

85

Structure of Matter, Forces, EM Waves, Spectroscopy, Doppler Effect  

NSDL National Science Digital Library

These supplemental class notes cover the basic properties of matter, the nature of forces, the electromagnetic spectrum, and how astronomers exploit the properties of the EM spectrum to deduce the physical nature of distant objects.

O'Connell, Robert

2005-06-28

86

An Innovative Tool to Assist in Rural EMS Response  

E-print Network

technologies for EMS -NextGeneration 911 -IP telephony -AACN -Mobile phones -Computer Aided Dispatch (CAD) -GPS (security & privacy) !Users must want to use it, be able to use it, like to use it !Leverage growth

Minnesota, University of

87

An Effective EMS Hardware and Software Interface- The Trained Operator  

E-print Network

you have es tablished operator training objectives, selecting appropriate training methods becomes easier. OPERATOR SKILL CATEGORIES Identifying and defining your EMS instructional objectives can be a fairly straightforward process. There is a... ings are minimal. An operator needs the full capability of being able to address all the EMS features and related individ ual building functions. Can you see the results of having a fully trained operator? Less personal frustration, improved use...

Cherry, C. L.

88

EM clustering analysis of diabetes patients basic diagnosis index.  

PubMed

Cluster analysis can group similar instances into same group and different instances into different groups. It assigns classes to samples without known the classes in advance. EM clustering algorithm can find number of distributions of generating data and build "mixture models". It identifies groups that are either overlapping or varying sizes and shapes. In this project, by using EM in Weka system, diabetes patient basic diagnosis index data have been analyzed for clustering. PMID:16779444

Wu, Cai; Steinbauer, Jeffrey R; Kuo, Grace M

2005-01-01

89

EM algorithm estimation of TCM scheme over multipath fading  

E-print Network

estimate is available to the receiver. B. Previous Research The following are some studies in application of EM algorithm in a, communicat, ion problem. Han and Georghiades [I] investigated the application of EM algorithm to t, he optimum receiver... 4. In Sections A and C, the structure of encoder an&i decoder implemented in the simulation is described. We described how the fading model is simulated in Section B. A. Transmitter A transmitter used in this study employs Ungerboeck's 8-state...

Gunawan, Wiedy

2012-06-07

90

Users of midwest EMS firm stuck without software  

SciTech Connect

Four midwest energy management system (EMS) users report delays in software delivery and a failure to achieve energy savings with National Control Systems Inc. (NCS) equipment. A fifth user has already replaced an unsatisfactory NCS system. Representatives of the users relate their experiences in trying to make the EMS systems works and to acquire the necessary software beyond the original start/stop functions. Most expect to deal with larger, more established companies in the future. (DCK)

Galvin, C.

1983-07-18

91

NASA EM Followup of LIGO-Virgo Candidate Events  

NASA Technical Reports Server (NTRS)

We present a strategy for a follow-up of LIGO-Virgo candidate events using offline survey data from several NASA high-energy photon instruments aboard RXTE, Swift, and Fermi. Time and sky-location information provided by the GW trigger allows for a targeted search for prompt and afterglow EM signals. In doing so, we expect to be sensitive to signals which are too weak to be publicly reported as astrophysical EM events.

Blackburn, Lindy L.

2011-01-01

92

DOE EM industry programs robotics development  

SciTech Connect

The Office of Science and Technology (OST) manages an aggressive program for RD and D, as well as testing and evaluation for the Department of Energy`s (DOE`s) Environmental Management (EM) organization. The goal is to develop new and improved environmental restoration and waste management technologies to clean up the inventory of the DOE weapons complex faster, safer, and cheaper than is possible with currently available technologies. Robotic systems reduce worker exposure to the absolute minimum, while providing proven, cost-effective, and, for some applications, the only acceptable technique for addressing challenging problems. Development of robotic systems for remote operations occurs in three main categories: tank waste characterization and retrieval; decontamination and dismantlement; and characterization, mapping, and inspection systems. In addition, the Federal Energy Technology Center (FETC) has some other projects which fall under the heading of supporting R and D. The central objective of all FETC robotic projects is to make robotic systems more attractive by reducing costs and health risks associated with the deployment of robotic technologies in the cleanup of the nuclear weapons complex. This will be accomplished through development of robots that are cheaper, faster, safer, and more reliable, as well as more straightforward to modify/adapt and more intuitive to operate with autonomous capabilities and intelligent controls that prevent accidents and optimize task execution.

Staubly, R.; Kothari, V.

1998-12-31

93

EM Task 9 - Centrifugal Membrane Filtration  

SciTech Connect

This project is designed to establish the utility of a novel centrifugal membrane filtration technology for the remediation of liquid mixed waste streams at US Department of Energy (DOE) facilities in support of the DOE Environmental Management (EM) program. The Energy and Environmental Research Center (EERC) has teamed with SpinTek Membrane Systems, Inc., a small business and owner of the novel centrifugal membrane filtration technology, to establish the applicability of the technology to DOE site remediation and the commercial viability of the technology for liquid mixed waste stream remediation. The technology is a uniquely configured process that makes use of ultrafiltration and centrifugal force to separate suspended and dissolved solids from liquid waste streams, producing a filtered water stream and a low-volume contaminated concentrate stream. This technology has the potential for effective and efficient waste volume minimization, the treatment of liquid tank wastes, the remediation of contaminated groundwater plumes, and the treatment of secondary liquid waste streams from other remediation processes, as well as the liquid waste stream generated during decontamination and decommissioning activities.

Stevens, B.G.; Stepan, D.J.; Hetland, M.D.

1998-11-01

94

Isolamento de Salmonella spp. em pombos (Columba livia) no Distrito Federal : aspecto de relevância ao sistema de vigilância em saúde.  

E-print Network

??Dissertação (mestrado)—Universidade de Brasília, Faculdade de Agronomia e Medicina Veterinária, Programa de Pós-Graduação em Saúde Animal, 2014. A domesticação de pombos da espécie Columba livia,… (more)

Santos, Ivanildo de Oliveira Correia

2014-01-01

95

Condensação de Bose-Einstein para um gás de bósons não interagentes em confinamentos bidimensionais em automatos celulares complexos.  

E-print Network

??Neste trabalho estudamos as propriedades termodinâmicas da Condensação de Bose-Einstein (CBE) para um gás de bósons não-interagentes confinado em potenciais bidimensionais V(x,y) que apresentam classicamente,… (more)

Daniel Schardosim Calovi

2007-01-01

96

STF mantm cobrana de taxa para inscrio em vestibular A Procuradoria-Geral Federal em atuao conjunta com a Procuradoria Regional  

E-print Network

STF mantém cobrança de taxa para inscrição em vestibular A Procuradoria-Geral Federal em atuação sustentava a constitucionalidade da cobrança da taxa de vestibular. Ao apreciar o caso, a Ministra Ellen a de inscrição em vestibular. Fonte: STF #12;

Floeter, Sergio Ricardo

97

Astronomia para/com crianças carentes em Limeira  

NASA Astrophysics Data System (ADS)

Em 2001, o Instituto Superior de Ciências Aplicadas (ISCA Faculdades de Limeira) iniciou um projeto pelo qual o Observatório do Morro Azul empreendeu uma parceria com o Centro de Promoção Social Municipal (CEPROSOM), instituição mantida pela Prefeitura Municipal de Limeira para atender crianças e adolescentes carentes. O CEPROSOM contava com dois projetos: Projeto Centro de Convivência Infantil (CCI) e Programa Criança e Adolescente (PCA), que atendiam crianças e adolescentes em Centros Comunitários de diversas áreas da cidade. Esses projetos têm como prioridades estabelecer atividades prazerosas para as crianças no sentido de retirá-las das ruas. Assim sendo, as crianças passaram a ter mais um tipo de atividade - as visitas ao observatório. Este painel descreve as várias fases do projeto, que envolveu: reuniões de planejamento, curso de Astronomia para as orientadoras dos CCIs e PCAs, atividades relacionadas a visitas das crianças ao Observatório, proposta de construção de gnômons e relógios de Sol nos diversos Centros Comunitários de Limeira e divulgação do projeto na imprensa. O painel inclui discussões sobre a aprendizagem de crianças carentes, relatos que mostram a postura das orientadoras sobre a pertinência do ensino de Astronomia, relatos do monitor que fez o atendimento no Observatório e o que o número de crianças atendidas representou para as atividades da instituição desde o início de suas atividades e, em particular, em 2001. Os resultados são baseados na análise de relatos das orientadoras e do monitor do Observatório, registros de visitas e matérias da imprensa local. Conclui com uma avaliação do que tal projeto representou para as Instituições participantes. Para o Observatório, em particular, foi feita uma análise com relação às outras modalidades de atendimentos que envolvem alunos de escolas e público em geral. Também é abordada a questão do compromisso social do Observatório na educação do público em questão.

Bretones, P. S.; Oliveira, V. C.

2003-08-01

98

Propulsion From a Rotating EM Tether at Jupiter  

NASA Technical Reports Server (NTRS)

The Jovian system with its rapid planetary rotation and strong magnetic field presents exciting opportunities for the use of electrodynamic (EM) tethers. Previous analysis for a radial, 10 km length tether demonstrated the possibility of propulsive forces as large as 50 Newtons near the planet. For orbital positions beyond about 2.5 Jovian radii, an EM tether can simultaneously be used for power and increases in the orbital altitude. Although the previous study demonstrated the physical feasibility of EM tether use at Jupiter, it did not address the issues of limited gravity gradient force for tether orientation and the practical use of this technology in an engineered system. This presentation will discuss these issues and current progress in an ongoing science/engineering transitional study.

Gallagher, D. L.; Moore, J.

2000-01-01

99

Longitudinal information and radiation damage in EM calorimetry  

SciTech Connect

The SCC radiation field is higher than that encountered by previous hadron collider detectors. In particular, the electromagnetic (EM) calorimeter compartment sees the highest radiation dose. Since an EM calorimeter also makes the most precise energy measurement, special care must be lavished on this part of a calorimeter. Previous studies have concentrated on Monte Carlo examinations of 2 longitudinal compartments within the EM which can alleviate radiation damage. Recently, it was realized that a ``shower maximum`` detector, such as exists in CDF, also contains information of the conversion point of an electromagnetic shower. As such, it can potentially be used in a fashion analogous to the longitudinal compartments, although it is not designed to be optimized for this role.

Green, D.

1993-02-05

100

Longitudinal information and radiation damage in EM calorimetry  

SciTech Connect

The SCC radiation field is higher than that encountered by previous hadron collider detectors. In particular, the electromagnetic (EM) calorimeter compartment sees the highest radiation dose. Since an EM calorimeter also makes the most precise energy measurement, special care must be lavished on this part of a calorimeter. Previous studies have concentrated on Monte Carlo examinations of 2 longitudinal compartments within the EM which can alleviate radiation damage. Recently, it was realized that a shower maximum'' detector, such as exists in CDF, also contains information of the conversion point of an electromagnetic shower. As such, it can potentially be used in a fashion analogous to the longitudinal compartments, although it is not designed to be optimized for this role.

Green, D.

1993-02-05

101

Quantitation of PET data with the EM reconstruction technique  

SciTech Connect

The expectation maximization (EM) algorithm offers high spatial resolution and excellent noise reduction with low statistics PET data, since it incorporates the Poisson nature of the data. The main difficulties are long computation times, difficulties to find appropriate criteria to terminate the reconstruction and to quantify the resulting image data. In the present work a modified EM algorithm has been implements on a VAX 11/780. Its capability to quantify image data has been tested in phantom studies and in two clinical cases, cerebral blood flow studies and dopamine D2-receptor studies. Data from phantom studies indicate the superiority of images reconstructed with the EM technique compared to images reconstructed with the conventional filtered back-projection (FB) technique in areas with low statistics. At higher statistics the noise characteristics of the two techniques coincide. Clinical data support these findings.

Rosenqvist, G.; Dahlbom, M.; Erikson, L.; Bohm, C.; Blomqvist, G.

1989-02-01

102

EMS Stretcher "Misadventures" in a Large, Urban EMS System: A Descriptive Analysis of Contributing Factors and Resultant Injuries  

PubMed Central

Purpose. There is a paucity of data regarding EMS stretcher-operation-related injuries. This study describes and analyzes characteristics associated with undesirable stretcher operations, with or without resultant injury in a large, urban EMS agency. Methods. In the study agency, all stretcher-related “misadventures” are required to be documented, regardless of whether injury results. All stretcher-related reports between July 1, 2009 and June 30, 2010 were queried in retrospective analysis, avoiding Hawthorne effect in stretcher operations. Results. During the year studied, 129,110 patients were transported. 23 stretcher incidents were reported (0.16 per 1,000 transports). No patient injury occurred. Four EMS providers sustained minor injuries. Among contributing aspects, the most common involved operations surrounding the stretcher-ambulance safety latch, 14/23 (60.9%). From a personnel injury prevention perspective, there exists a significant relationship between combative patients and crew injury related to stretcher operation, Fisher's exact test 0.048. Conclusions. In this large, urban EMS system, the incidence of injury related to stretcher operations in the one-year study period is markedly low, with few personnel injuries and no patient injuries incurred. Safety for EMS personnel and patients could be advanced by educational initiatives that highlight specific events and conditions contributing to stretcher-related adverse events. PMID:22606379

Goodloe, Jeffrey M.; Crowder, Christopher J.; Arthur, Annette O.; Thomas, Stephen H.

2012-01-01

103

Developments in the EM-CCD camera for OGRE  

NASA Astrophysics Data System (ADS)

The Off-plane Grating Rocket Experiment (OGRE) is a sub-orbital rocket payload designed to advance the development of several emerging technologies for use on space missions. The payload consists of a high resolution soft X-ray spectrometer based around an optic made from precision cut and ground, single crystal silicon mirrors, a module of off-plane gratings and a camera array based around Electron Multiplying CCD (EM-CCD) technology. This paper gives an overview of OGRE with emphasis on the detector array; specifically this paper will address the reasons that EM-CCDs are the detector of choice and the advantages and disadvantages that this technology offers.

Tutt, James H.; McEntaffer, Randall L.; DeRoo, Casey; Schultz, Ted; Miles, Drew M.; Zhang, William; Murray, Neil J.; Holland, Andrew D.; Cash, Webster; Rogers, Thomas; O'Dell, Steve; Gaskin, Jessica; Kolodziejczak, Jeff; Evagora, Anthony M.; Holland, Karen; Colebrook, David

2014-07-01

104

Mixture densities, maximum likelihood, and the EM algorithm  

NASA Technical Reports Server (NTRS)

The problem of estimating the parameters which determine a mixture density is reviewed as well as maximum likelihood estimation for it. A particular iterative procedure for numerically approximating maximum likelihood estimates for mixture density problems is considered. This EM algorithm, is a specialization to the mixture density context of a general algorithm of the same name used to approximate maximum likelihood estimates for incomplete data problems. The formulation and theoretical and practical properties of the EM algorithm for mixture densities are discussed focussing in particular on mixtures of densities from exponential families.

Redner, R. A.; Walker, H. F.

1982-01-01

105

Waste fuel, EMS may save plant $1M yearly  

SciTech Connect

A mixture of paper trash and coal ash fueling an Erie, Pa. General Electric plant and a Network 90 microprocessor-based energy-management system (EMS) to optimize boiler efficiency will cost about $3 million and have a three-to-four-year payback. Over half the savings will come from the avoided costs of burning plant-generated trash. The EMS system will monitor fuel requirements in the boiler and compensate for changes in steam demand. It will also monitor plant electrical needs and control the steam diverted for cogeneration. (DCK)

Barber, J.

1982-05-24

106

Airborne EM for geothermal and hydrogeological mapping  

NASA Astrophysics Data System (ADS)

Within the "VIGOR" project, aimed at assessing the geothermal potential of four regions in southern Italy, Airborne EM data have been acquired, modeled and interpreted. The system deployed was SkyTEM, a time-domain helicopter electromagnetic system designed for hydrogeophysical, environmental and mineral investigations. The AEM data provide, after data acquisition, analysis, processing, and modeling, a distribution volume of electrical resistivity, spanning an investigation depth from ground surface of few hundred meters, depending on resistivity condition. Resistivity is an important physical parameter for geothermal investigation, since it proved to be very effective in mapping anomalies due to hydrothermal fluid circulation, which usually has high salt content and produces clayey alteration minerals. Since the project required, among other issues, to define geothermal resources at shallow level, it was decided to perform a test with an airborne electromagnetic geophysical survey, to verify the advantages offered by the system in covering large areas in a short time. The geophysical survey was carried out in Sicily, Italy, in late 2011, over two test sites named "Termini" and "Western Sicily". The two areas were chosen on different basis. "Termini" area is covered by extensive geological surveys, and was going to be investigated also by means of electrical tomography in its northern part. Since geological condition of Sicily, even at shallow depth, is very complex, this area provided a good place for defining the resistivity values of the main geological units outcropping in the region. "Termini" survey has been also an occasion to define relations between resistivity distribution, lithological units and thermal conductivity. The "Western Sicily" area cover the main thermal manifestations of western Sicily, and the research target was to establish whether they are characterized by common hydrogeological or tectonic features that could be mapped by resistivity. SkyTEM data have been acquired in a series of flight lines and were then processed and inverted. In the "Termini" area the flight line spacing had 150 m separation. In the "Western Sicily" area two different line spacing were used: the 1 km spacing was used for the regional mapping, whereas for infill areas, around the main hydrothermal springs, the flight lines had 100 m spacing. The total number of flight line was 4580 km, and the explored surface was in excess of 2000 km2. After acquisition, data were processed to eliminate coupling with infrastructures, and noise. Inversions was then carried out using the quasi 3-D Spatially Constrained Inversion. The obtained resistivity volume has then been the base for a detailed lithological and geothermal interpretation. Lithological and geological maps were used to constrain surface condition and to understand the resistivity ranges of the different lithological units. On the base of resistivity values, lithological units were combined to establish the main litho-resistive units, then modeled at depth, down to achievable investigation depth. This detailed interpretative modeling was also the occasion of recognizing resistivity anomalies within carbonate units, which may possibly represent hydrogeological or hydrothermal bodies. The litho-resitive 3D model is now under investigation to verify how it can represent a viable way to image thermal conductivity variations at depth.

Menghini, A.; Manzella, A.; Viezzoli, A.; Montanari, D.; Maggi, S.

2012-12-01

107

Aquisi??o de Estreptococos Mutans e Desenvolvimento de C?rie Dental em Primog?nitos  

PubMed Central

Objetivo Avaliar o momento de aquisição de estreptococos mutans (EM), desenvolvimento de cárie dental e as variáveis a eles associadas no decorrer de 23 meses, em primogênitos de famílias de baixo nível socioeconômico, desde os sete meses de idade. Método A amostra foi selecionada com base em mães densamente colonizadas por EM, incluindo todos os membros de 14 famílias que conviviam na mesma casa. Foram envolvidos no estudo 14 mães, pais e primogênitos e 8 parentes, na maioria avós. Exames clínicos e radiográficos iniciais determinaram os índices de cárie e condição periodontal dos adultos. Contagens de EM foram feitas em todos os adultos nas duas primeiras visitas. Nas crianças foram avaliados os níveis de EM, o número de dentes e de cáries, em quatro visitas. Resultados A prevalência de EM nos adultos foi alta, estando ausente em apenas um dos pais. EM foram detectados em 1, 2, 3 e 10 crianças, respectivamente nas visitas #1, 2, 3 e 4. A cárie dental foi detectada em apenas três crianças na última visita (aos 30 meses de idade), as quais apresentaram escores de EM significantemente maiores que as crianças sem cárie, na mesma visita. Conclusão Exclusivamente a condição social de baixa renda e mães densamente colonizadas por EM não são sinônimo de colonização precoce e alta atividade de cárie em crianças cuidadas em casa. O desenvolvimento de cárie está significantemente associado a escores elevados de EM nas crianças. PMID:22022218

NOCE, Erica; RUBIRA, Cassia Maria Fischer; da Silva ROSA, Odila Pereira; da SILVA, Salete Moura Bonifacio; BRETZ, Walter Antonio

2011-01-01

108

UNIVERSIDADE DE BRASLIA PROGRAMA DE PS-GRADUAO EM DESENVOLVIMENTO SUSTENTVEL  

E-print Network

de livro com ISBN ou paper em periódico Qualis B2 ou inferior, 15 pontos por livro ou paper em (Máximo 100 pontos) 100 (*) 7 pontos por capítulo de livro com ISBN ou paper em periódico Qualis B2 ou inferior, 15 pontos por livro ou paper em periódico Qualis B1 ou superior. (**) 2,5 por ano/projeto (***) 2

Maier, Rudolf Richard

109

Mutagenic effectiveness and efficiency of EMS, DES and gamma-rays in rice  

Microsoft Academic Search

Data on chlorophyll mutation frequency after treatment with EMS, DES and gamma-rays and sequential administration of gamma-rays and the two alkylating agents in three varieties of rice have been used to work out quantitatively the effectiveness and efficiency of each mutagen and combination treatment. For effectiveness, the order is EMS > DES and for efficiency it is EMS > DES

M. L. H. Kaul; A. K. Bhan

1977-01-01

110

Convergence results for the EM approach to mixtures of experts architectures  

Microsoft Academic Search

The Expectation-Maximization (EM) algorithm is an iterative approach to maximum likelihood parameter estimation. Jordan and Jacobs recently proposed an EM algorithm for the mixture of experts architecture of Jacobs, Jordan, Nowlan and Hinton (1991) and the hierarchical mixture of experts architecture of Jordan and Jacobs (1992). They showed empirically that the EM algorithm for these architectures yields significantly faster convergence

Michael I. Jordan; Lei Xu

1995-01-01

111

Quasi-Monte Carlo Sampling to improve the Efficiency of Monte Carlo EM  

E-print Network

Quasi-Monte Carlo Sampling to improve the Efficiency of Monte Carlo EM Wolfgang Jank Department@rhsmith.umd.edu November 17, 2003 Abstract In this paper we investigate an efficient implementation of the Monte Carlo EM al- gorithm based on Quasi-Monte Carlo sampling. The Monte Carlo EM algorithm is a stochastic version

Jank, Wolfgang

112

Hierarchical mixtures of experts and the EM algorithm  

Microsoft Academic Search

We present a tree-structured architecture for supervised learning. The statistical model underlying the architecture is a hierarchical mixture model in which both the mixture coefficients and the mixture components are generalized linear models (GLIMs). Learning is treated as a maximum likelihood problem; in particular, we present an expectation-maximization (EM) algorithm for adjusting the parameters of the architecture. We also develop

Michael I. Jordan; Robert A. Jacobs

1993-01-01

113

Hierarchical Mixtures of Experts and the EM Algorithm  

Microsoft Academic Search

We present a tree-structured architecture for supervised learning. The statistical model underlying the architecture is a hierarchical mixture model in which both the mixture coefficients and the mixture components are generalized linear models (GLIM's). Learning is treated as a maximum likelihood problem; in particular, we present an Expectation-Maximization (EM) algorithm for adjusting the parameters of the architecture. We also develop

Michael I. Jordan; Robert A. Jacobs

1994-01-01

114

An EM algorithm for a semiparametric mixture model  

E-print Network

An EM algorithm for a semiparametric mixture model Laurent Bordes1 Didier Chauveau2 Pierre Marne-la-Vall´ee & CNRS January 2006 Abstract. Recently several authors considered finite mixture models not obvious, and when it occurs, inference methods are rather specific to the mixture model under

Vandekerkhove, Pierre

115

Symmetry-restrained flexible fitting for symmetric EM maps  

PubMed Central

Summary Many large biological macromolecules have inherent structural symmetry, being composed of a few distinct subunits, repeated in a symmetric array. These complexes are often not amenable to traditional high-resolution structural determination methods, but can be imaged in functionally relevant states using cryo-electron microscopy (cryo-EM). A number of methods for fitting atomic-scale structures into cryo-EM maps have been developed, including the molecular dynamics flexible fitting (MDFF) method. However, quality and resolution of the cryo-EM map are the major determinants of a method’s success. In order to incorporate knowledge of structural symmetry into the fitting procedure, we developed the symmetry-restrained MDFF method. The new method adds to the cryo-EM map-derived potential further restraints on the allowed conformations of a complex during fitting, thereby improving the quality of the resultant structure. The benefit of using symmetry-based restraints during fitting, particularly for medium to low-resolution data, is demonstrated for three different systems. PMID:21893283

Chan, Kwok-Yan; Gumbart, James; McGreevy, Ryan; Watermeyer, Jean M.; Sewell, B. Trevor; Schulten, Klaus

2011-01-01

116

Fault Tolerant Control for EMS systems with sensor failure  

Microsoft Academic Search

The paper presents a method to recover the performance of an EMS (Electromagnetic suspension) under faulty air gap measurement. The controller is a combination of classical control loops, a Kalman estimator and analytical redundancy (for the air gap signal). In case of a faulty air gap sensor the air gap signal is recovered using the Kalman filter and analytical redundancy.

Konstantinos Michail; Argyrios Zolotas; Roger Goodall; John Pearson

2009-01-01

117

O ser em metamorfose Jornal Circulao n. 55  

E-print Network

assédio moral quando, em 1912, Kafka escreveu o livro, mas a história serve bem como metáfora para os Samsa, no livro, não desperta de novo humano e morre sozinho, reduzido à condição de inseto, porque não

Floeter, Sergio Ricardo

118

DESENVOLVIMENTO PROFISSIONAL DA DOCÊNCIA UNIVERSITÁRIA EM OUTROS CONTEXTOS  

Microsoft Academic Search

Resumo: O intuito desta exposição é apresentar, com base na análise da experiência da RED- U - Red Estatal de Docencia Universitaria constituída por universidades espanholas, uma reflexão em torno do desenvolvimento profissional do docente universitário no atual contexto de globalização. A referida rede representa um espaço para a difusão e o intercâmbio de políticas, experiências, metodologias e ferramentas utilizadas

Solange Maria Longhi

119

Iterative EM Design of an MRI Magnet Using HTS Materials  

Microsoft Academic Search

Conventional superconducting MRI magnet electromagnetic (EM) design involves the critical parameters of the magnet field and dimensional requirements, plus the low temperature superconductor (LTS) wire properties. When using HTS material for an MRI magnet, in addition to the conventional characteristics of a superconductor, the wire and the joint resistance need also to be considered. This is mainly due to the

Minfeng Xu; Michele Ogle; Xianrui Huang; Kathleen Amm; Evangelos T. Laskaris

2007-01-01

120

Cost-Effectiveness Analysis of Helicopter EMS for Trauma Patients  

Microsoft Academic Search

Study objective: To evaluate the cost-effectiveness of helicopter EMS for trauma patients. Methods: We applied a cost-effectiveness analysis from the service provider's perspective to cost and effectiveness estimates. The cost estimates comprise direct operating costs and additional survivors' hospital costs. The effectiveness estimates were calculated with the TRISS methodology from literature sources and data from a cohort of patients transported

Peter A Gearhart; Richard Wuerz; A. Russell Localio

1997-01-01

121

ISO 14001 EMS standard registration decisions among Canadian organizations  

Microsoft Academic Search

This study characterized the costs and benefits associated with adopting ISO 14001 environmental management system (EMS) standard, based on a survey of ISO 14001-registered organizations in Canada. Decision makers are contemplating whether it is necessary to register to one or more of the ISO and other international standards and, if so, which ones. Furthermore, an organization that has registered separate

Emmanuel K. Yiridoe; J. Stephen Clark; Geb E. Marett; Robert Gordon; Peter Duinker

2003-01-01

122

NUMBER: EM 1.00 (NEW) SECTION: Emergency Management  

E-print Network

NUMBER: EM 1.00 (NEW) SECTION: Emergency Management SUBJECT: Emergency Notification System Policy: Michael Amiridis Issued by: Emergency Management I. Policy Per the Higher Education Opportunity Act the Carolina Alert system. a. Emergency Management Coordinator, University of South Carolina Division of Law

Almor, Amit

123

Leica EM AFS2 Automatic Freeze Substitution System  

E-print Network

" excludes humidity and oxygen · Fast UV polymerization with LED UV lamp Flexibility · Any choice is polymerized under UV light in the EM AFS2 and can be cut and immuno labelled. LED UV lamp FS chamber with new. An integrated LED UV lamp allows immediate polymerization of the samples. Automatic process · One step

Chapman, Michael S.

124

EM Structure-Based Accelerators Working Group Summary  

Microsoft Academic Search

This Working Group (WG) focused on EM Structure-Based Accelerators, which covers a broad area of mechanisms and experiments. Topics covered included dielectric wakefield accelerators (DWA), photonic bandgap accelerators (PBGA), inverse free electron lasers (IFEL), vacuum laser accelerators (VLA), other novel schemes, and supporting analysis and modeling. In addition, this WG was tasked at the Workshop with developing conceptual (strawman) designs

W. D. Kimura; S. M. Lidia

2004-01-01

125

University of Northern British Columbia Posting #12-079EM  

E-print Network

duties, the Residence and Student Life Manager is responsible for the effective management of ResidenceUniversity of Northern British Columbia Posting #12-079EM Residence & Student Life Manager (Regular to a sustainable future. UNBC's main campus is located in Prince George, a city of nearly 80,000 people near

Northern British Columbia, University of

126

The EM Algorithm February 2/4, 2004  

E-print Network

(energy) and the second term, which does not depend on , is the entropy. · Thus, in the M-step, maximizing optimization easier. Expectation-Maximization (EM) Algorithm · Iterative algorithm with two linked steps: E of a marginal probability: (; x) = log p(x|) = log z p(x, z|) which is the incomplete log likelihood. #12

Roweis, Sam

127

Accurate EM-TV algorithm in PET with low SNR  

Microsoft Academic Search

PET measurements of tracers with a lower dose rate or short radioactive half life suffer from extremely low SNRs. In these cases standard reconstruction methods (OSEM, EM, filtered backprojection) deliver unsatisfactory and noisy results. Here, we propose to introduce nonlinear variational methods into the reconstruction process to make an efficient use of a-priori information and to attain improved imaging results.

Alex Sawatzky; Christoph Brune; Frank Wiibbeling; Thomas Kosters; Klaus Schafers; Martin Burger

2008-01-01

128

ISSN 0103-9741 Monografias em Cincia da Computao  

E-print Network

Carlos José Pereira de Lucena Tácio Mauro Pereira de Campos Mônica Priscila Hernandez Moncada-9741 Editor: Prof. Carlos José Pereira de Lucena Novembro, 2009 Um Agente Especialista em Recomendação de Pereira de Lucena, Tácio Mauro Pereira de Campos, Mônica Priscila Hernandez Moncada bneto

Endler, Markus

129

GEOBULLETIN NOvEmBEr 1sT  

E-print Network

GEOBULLETIN NOvEmBEr 1sT 2013 - 1 - GeoBulletin is distributed weekly, by E-mail. Contributions are requested! If you have a news item, a request, an announcement etc. email it to geodept@geology.wisc.edu or leave it at the office, Room 225 by Noon on Wednesday. WEEKS LECTURE - FALL 2013 Nov. 1 Laura Wallace UT

Carlson, Anders

130

A Science Service Feature 1 WHYTHE"EmHER ?  

E-print Network

A Science Service Feature 1 WHYTHE"EmHER ? Dr. Charles F. Erooks, Secretary, American the plain white f l a g has a dark trh@&aLr f l a g above i t the prophesy is fair and warmer by Science Service Science Service, 1115 Conn. Ave., Washington, D .C . #12;

131

Learning Active Basis Models by EM-Type Algorithms  

E-print Network

Learning Active Basis Models by EM-Type Algorithms Zhangzhang Si1, Haifeng Gong1,2, Song-Chun Zhu1 scheme for learning image templates of object categories where the learning is not fully supervised. We and orientations to account for the deformations of object shapes. The model can be easily learned when the objects

Wu, Ying Nian

132

"Cada ser, em si, carrega o dom de ser capaz de ser feliz" : um estudo de caso baseado em Alfred Adler, Lev Vigotski e González Rey.  

E-print Network

??Dissertação (mestrado)—Universidade de Brasília, Faculdade de Educação, 2011. As crianças que apresentam qualquer marca em seu desenvolvimento, seja um defeito físico, ausência sensorial ou, até… (more)

Batista, Anelice da Silva

2011-01-01

133

Composting of rice straw with effective microorganisms (EM) and its influence on compost quality  

PubMed Central

This study aims to assess the effect of EM application on the composting process of rice straw with goat manure and green waste and to evaluate the quality of both compost treatments. There are two treatment piles in this study, in which one pile was applied with EM and another pile without EM. Each treatment was replicated three times with 90 days of composting duration. The parameters for the temperature, pH, TOC and C/N ratio, show that decomposition of organic matter occurs during the 90-day period. The t-test conducted shows that there is a significant difference between compost with EM and compost without EM. The application of EM in compost increases the macro and micronutrient content. The following parameters support this conclusion: compost applied with EM has more N, P and K content (P?EM. Although the Fe in compost with EM is much higher (P?EM, for Zn and Cu, there is no significant difference between treatments. This study suggests that the application of EM is suitable to increase the mineralization in the composting process. The final resultant compost indicated that it was in the range of the matured level and can be used without any restriction. PMID:23390930

2013-01-01

134

Método numérico das diferenças finitas no domínio do tempo aplicado a ondas Alfvén em plasma astrofísico  

NASA Astrophysics Data System (ADS)

Ondas Alfvén em plasma astrofísico têm sido objeto de intenso estudo nas últimas décadas pelo fato de apresentarem papel importante em muitas áreas de pesquisa na astrofísica. Particularmente são importantes no mecanismo de aquecimento da coroa solar; em ventos estelares; em jatos galácticos e extragalácticos; em discos protoestelares, etc. A formulação para diferenças finitas no domínio do tempo (FDTD), aplicada a plasma magnetizado é desenvolvida para estudo das propriedades de ondas Alfvén em três dimensões (3D-FDTD). O método é aplicado inicialmente a um plasma homogêneo e isotérmico imerso em uma região com campo magnético externo B0, que sofre uma pequena perturbação. Uma vez gerada a onda, esta perturbação é retirada e, então analisamos a evolução temporal das ondas, bem como a forma de seu amortecimento.

Dos Santos, L. C.; Kintopp, J. A.; Jatenco-Pereira, V.; Opher, R.

2003-08-01

135

Superconducting Electromagnetic Suspension (EMS) system for Grumman Maglev concept  

NASA Technical Reports Server (NTRS)

The Grumman developed Electromagnetic Suspension (EMS) Maglev system has the following key characteristics: a large operating airgap--40 mm; levitation at all speeds; both high speed and low speed applications; no deleterious effects on SC coils at low vehicle speeds; low magnetic field at the SC coil--less than 0.35 T; no need to use non-magnetic/non-metallic rebar in the guideway structure; low magnetic field in passenger cabin--approximately 1 G; low forces on the SC coil; employs state-of-the-art NbTi wire; no need for an active magnet quench protection system; and lower weight than a magnet system with copper coils. The EMS Maglev described in this paper does not require development of any new technologies. The system could be built with the existing SC magnet technology.

Kalsi, Swarn S.

1994-01-01

136

Environmental Restoration and Waste Management (EM) program: An introduction  

SciTech Connect

This booklet introduces the reader to the mission and functions of a major new unit within the US Department of Energy (DOE): the Office of Environmental Restoration and Waste Management (EM). The Secretary of Energy established EM in November 1989, implementing a central purpose of DOE's first annual Environmental Restoration and Waste Management Five-Year Plan, which had appeared three months earlier. The contents of this booklet, and their arrangement, reflect the annual update of the Five-Year Plan. The Five-Year Plan supports DOE's strategy for meeting its 30-year compliance and cleanup goal. This strategy involves: focusing DOE's activities on eliminating or reducing known or recognized potential risks to worker and public health and the environment, containing or isolating, removing, or detoxifying onsite and offsite contamination, and developing technology to achieve DOE's environmental goals.

Not Available

1990-12-01

137

Evolução temporal de discos circunstelares em estrelas Be  

NASA Astrophysics Data System (ADS)

A pesquisa do mecanismo que leva uma estrela do tipo Be a perder massa e formar um envelope circunstelar, nomeado como fenômeno Be, é uma questão em aberto, intrigante, e que adquire contornos interessantes em face às informações espectroscópicas de alta resolução. Nesta última década, consolida-se a idéia de que a forma destes envelopes é de tipo discóide, obedecendo a uma lei Kepleriana de velocidades, e mais ainda, recentemente há evidências de que a distribuição de matéria nestes discos pode assumir um caráter de anel. Medidas de algumas dimensões de discos circunstelares puderam ser obtidas pela análise de espectros de alta resolução e alta relação sinal-ruído para as estrelas Be: alpha Eri (HD 10144, B3Vpe), omicron And (HD 217675, B6IIIpe), e eta Cen (HD el972, B1.5Vne), no período dos anos de 1991 a 2001. Alguns modelos clássicos de envelope predizem uma distribuição de massa que decresce suavemente a partir da superfície estelar. Entretanto, considerando que a separação de picos de emissão em perfis de linhas do HeI e H-alpha, alargados por efeitos cinemáticos, é função do raio estelar e da velocidade rotacional projetada (vsini); nossos resultados sugerem a presença de um anel de matéria circunstelar, que aparece logo após a ejeção do material fotosférico, imediatamente acima da superfície estelar, e que se expande para raios maiores ao longo do tempo, eventualmente desconectando-se da superfície por uma região de densidade de matéria mínima. Tais interpretações revivem a idéia de que anéis de matéria circunstelar podem ser os responsáveis por algumas variabilidades em perfis de linhas de emissão, como as variações V/R.

Fernandes, M. V. M.; Leister, N. V.; Levenhagen, R. S.

2003-08-01

138

ISSN 0103-9741 Monografias em Cincia da Computao  

E-print Network

PUC ISSN 0103-9741 Monografias em Ciência da Computação n° 05/06 IPTV Conceitos, Padrões e Soluções Computação, No. 05/06 ISSN: 0103-9741 Editor: Prof. Carlos José Pereira de Lucena Fevereiro, 2006 IPTV ) ! %& % * & + %& %& 1 >1 , 2 Soluções e provedores de serviço de IPTV 2.1 Soluções : %) % %) % 6

Endler, Markus

139

Da universidade para o mercado de trabalho em onze pases  

E-print Network

Universia está a ser lançado em várias instituições de ensino superior portuguesas. Rede ibero-americana regista por mês 195 mil ofertas ANA BELA FERREIRA Desde quinta-feira que os 23 mil alunos da Universidade a pró-rei- tora, Ana Nunes de Almeida. Ao aderir a esta plataforma, que con- centra não só ofertas

Instituto de Sistemas e Robotica

140

Override problems lead chain to EMS with remote monitor  

SciTech Connect

When R.B. Furniture Co. employees began overriding the Trimax energy management system (EMS) in the company's 61 showrooms, the company shifted to En-Log units for the remaining stores despite the 9- to 22-month payback of the Trimax systems. Remote communications allow monitoring of the En-Log systems and prevent overrides. The case history compares specifications and costs for the two systems. (DCK)

Galvin, C.

1983-09-26

141

EMS users find solutions to voltage-surge problems  

SciTech Connect

The microchips in energy-management systems (EMS) are especially vulnerable to damage due to voltage surges, but the addition of surge suppressors to cut off the peak of spikes at a certain level or the use of fiber-optic cable that transmits light signals instead of electricity can overcome the problem. Users are often unaware that lightning, utility-grid switching, or the shutting down of large equipment can cause surges that garble computer information. (DCK)

Galvin, C.

1983-01-24

142

ISSN 0103-9741 Monografias em Cincia da Computao  

E-print Network

Pereira Sardinha Carlos José Pereira de Lucena Departamento de Informática PONTIFÍCIA UNIVERSIDADE;Monografias em Ciência da Computação, No. 32/05 ISSN: 0103-9741 Editor: Prof. Carlos José Pereira de Lucena * Carolina Howard Felicíssimo, José Alberto Pereira Rodrigues Sardinha, Carlos José de Pereira de Lucena

Endler, Markus

143

The US DOE-EM International Program - 13004  

SciTech Connect

The U.S. Department of Energy (DOE) Office of Environmental Management (EM) conducts international collaboration activities in support of U.S. policies and objectives regarding the accelerated risk reduction and remediation of environmental legacy of the nations' nuclear weapons program and government sponsored nuclear energy research. The EM International Program supported out of the EM Office of the Associate Principal Deputy Assistant Secretary pursues collaborations with foreign government organizations, educational institutions and private industry to assist in identifying technologies and promote international collaborations that leverage resources and link international experience and expertise. In fiscal year (FY) 2012, the International Program awarded eight international collaborative projects for work scope spanning waste processing, groundwater and soil remediation, deactivation and decommissioning (D and D) and nuclear materials disposition initiatives to seven foreign organizations. Additionally, the International Program's scope and collaboration opportunities were expanded to include technical as well as non-technical areas. This paper will present an overview of the on-going tasks awarded in FY 2012 and an update of upcoming international activities and opportunities for expansion into FY 2013 and beyond. (authors)

Elmetti, Rosa R.; Han, Ana M.; Williams, Alice C. [Department of Energy, Office of Environmental Management, 1000 Independence Ave. SW, Washington, DC 20585 (United States)] [Department of Energy, Office of Environmental Management, 1000 Independence Ave. SW, Washington, DC 20585 (United States)

2013-07-01

144

Hydration-layer models for cryo-EM image simulation  

PubMed Central

To compare cryo-EM images and 3D reconstructions with atomic structures in a quantitative way it is essential to model the electron scattering by solvent (water or ice) that surrounds protein assemblies. The most rigorous method for determing the density of solvating water atoms for this purpose has been to perform molecular-dynamics (MD) simulations of the protein-water system. In this paper we adapt the ideas of bulk-water modeling that are used in the refinement of X-ray crystal structures to the cryo-EM solvent-modeling problem. We present a continuum model for solvent density which matches MD-based results to within sampling errors. However, we also find that the simple binary-mask model of Jiang and Brünger (1994) performs nearly as well as the new model. We conclude that several methods are now available for rapid and accurate modeling of cryo-EM images and maps of solvated proteins. PMID:22609687

Shang, Zhiguo; Sigworth, Fred J.

2013-01-01

145

Improving EM&V for Energy Efficiency Programs (Fact Sheet)  

SciTech Connect

This fact sheet describes the objectives of the U.S. Department of Energy Uniform Methods Project to bring consistency to energy savings calculations in U.S. energy efficiency programs. The U.S. Department of Energy (DOE) is developing a framework and a set of protocols for determining gross energy savings from energy efficiency measures and programs. The protocols represent a refinement of the body of knowledge supporting energy efficiency evaluation, measurement, and verification (EM&V) activities. They have been written by technical experts within the field and reviewed by industry experts. Current EM&V practice allows for multiple methods for calculating energy savings. These methods were developed to meet the needs of energy efficiency program administrators and regulators. Although they served their original objectives well, they have resulted in inconsistent and incomparable savings results - even for identical measures. The goal of the Uniform Methods Project is to strengthen the credibility of energy savings determinations by improving EM&V, increasing the consistency and transparency of how energy savings are determined.

Not Available

2012-07-01

146

Perda de massa em ventos empoeirados de estrelas supergigantes  

NASA Astrophysics Data System (ADS)

Em praticamente todas as regiões do diagrama HR, as estrelas apresentam evidências observacionais de perda de massa. Na literatura, pode-se encontrar trabalhos que tratam tanto do diagnóstico da perda de massa como da construção de modelos que visam explicá-la. O amortecimento de ondas Alfvén tem sido utilizado como mecanismo de aceleração de ventos homogêneos. Entretanto, sabe-se que os envelopes de estrelas frias contêm grãos sólidos e moléculas. Com o intuito de estudar a interação entre as ondas Alfvén e a poeira e a sua conseqüência na aceleração do vento estelar, Falceta-Gonçalves & Jatenco-Pereira (2002) desenvolveram um modelo de perda de massa para estrelas supergigantes. Neste trabalho, apresentamos um estudo do modelo acima proposto para avaliar a dependência da taxa de perda de massa com alguns parâmetros iniciais como, por exemplo, a densidade r0, o campo magnético B0, o comprimento de amortecimento da onda L0, seu fluxo f0, entre outros. Sendo assim, aumentando f0 de 10% a partir de valores de referência, vimos que aumenta consideravelmente, enquanto que um aumento de mesmo valor em r0, B0 e L0 acarreta uma diminuição em .

Vidotto, A. A.; Jatenco-Pereira, V.

2003-08-01

147

Retrospectively exploring the importance of items in the decision to leave the emergency medical services (EMS) profession and their relationships to life satisfaction after leaving EMS and likelihood of returning to EMS.  

PubMed

An exit survey was returned by a sample of 127 respondents in fully compensated positions who left the EMS profession, most within 12 months prior to filling out the exit survey. A very high percentage continued to work after leaving EMS. Respondents were asked to rate the importance of each of 17 items in affecting their decision to leave EMS. A higher than anticipated response to a "not applicable" response choice affected the usability of 8 of these items. Nine of the 17 items had at least 65 useable responses and were used for further analysis. Within these 9, stress/burnout and lack of job challenges had the highest importance in affecting the decision to leave EMS, while desire for better pay and benefits had the lowest importance. Desire for career change was positively related to life satisfaction after leaving EMS and negatively related to likelihood of returning to EMS. Stress/burnout was positively related to life satisfaction after leaving EMS. Study limitations and future research issues are briefly discussed. PMID:21695362

Blau, Gary; Chapman, Susan

2011-01-01

148

Inhomogeneous Media 3D EM Modeling with Integral Equation Method  

NASA Astrophysics Data System (ADS)

In general, only the half space of earth is considered in electromagnetic exploration. However, for the long bipole source, because the length is close to the height of ionosphere and also most offsets between source and receivers are equal or larger than the height of ionosphere, the effect of ionosphere on the electromagnetic (EM) field should be considered when observation is carried at a very far (about several thousands kilometers) location away from the source. At this point the problem becomes one which should contain ionosphere, atmosphere and earth that is “earth-ionosphere” case. There are a few of literatures to report the electromagnetic field results which is including ionosphere, atmosphere and earth media at the same time. We firstly calculate the electromagnetic fields with the traditional controlled source (CSEM) configuration using integral equation (IE) method for a three layers earth-ionosphere model. The modeling results agree well with the half space analytical results because the effect of ionosphere for this small scale bipole source can be ignorable. The comparison of small scale three layers earth-ionosphere modeling and half space analytical resolution shows that the IE method can be used to modeling the EM fields for long bipole large offset configuration. In order to discuss EM fields’ characteristics for complicate earth-ionosphere media excited by long bipole source in the far-field and wave-guide zones, we first modeled the decay characters of electromagnetic fields for three layers earth-ionosphere model. Because of the effect of ionosphere, the earth-ionosphere electromagnetic fields’ decay curves with given frequency show that there should be an extra wave guide zone for long bipole artificial source, and there are many different characters between this extra zone and far field zone. They are: 1) the amplitudes of EM fields decay much slower; 2) the polarization patterns change; 3) the positions better to measure Zxy and Zyx change; 4) there exits the polarization ellipse of electric and magnetic fields; 5) the long axis direction of the polarization ellipse in wave guide zone changes comparing to quasi static EM fields. In order to further model the EM fields for complex inhomogeneous media, we conducted the EM fields modeling for Biyang depressed basin of China. The bottom depth of the oil basin is about 8km. We added one ionosphere layer with thickness 100km and resistivity 104 Ohm-m and one atmosphere layer with thickness 100km and resistivity 1014 Ohm-m over the solid earth surface during the forward modeling. For easily to compare with the 2D seismic exploration result, we conducted the apparent resistivity modeling of equatorial array for the same survey line as seismic did for an 50km long bipole source with offset 400km and the same frequencies as that used for above three layers model. The modeling apparent resistivity pseudo-section has clearly shown the oil basin geology structure.

di, Q.; Wang, R.; An, Z.; Fu, C.; Xu, C.

2010-12-01

149

UNIVERSIDADE DE BRASLIA PROGRAMA DE RESIDNCIA MDICO VETERINRIA EM ANATOMIA PATOLGICA  

E-print Network

1 UNIVERSIDADE DE BRASÍLIA PROGRAMA DE RESID�NCIA M�DICO VETERINÁRIA EM ANATOMIA PATOL�GICA ANATOMIA PATOL�GICA VETERINÁRIA PARA O PRIMEIRO PERÍODO LETIVO DE 2011 1. PRE�MBULO 1.1 O Presidente da Veterinária em Anatomia Patológica Veterinária, em conformidade com as exigências do Regulamento deste

Maier, Rudolf Richard

150

UNIVERSIDADE DE BRASLIA (UnB) PROGRAMA DE PS-GRADUAO EM ECONOMIA  

E-print Network

UNIVERSIDADE DE BRASÍLIA (UnB) PROGRAMA DE P�S-GRADUA��O EM ECONOMIA EDITAL No. 06/2013 SELE��O DE CANDIDATOS �S VAGAS DO PROGRAMA DE P�S-GRADUA��O EM ECONOMIA, PARA O CURSO DE MESTRADO PROFISSIONAL, ÁREA DE CONCENTRA��O EM ECONOMIA DO SETOR P�BLICO, PARA O PRIMEIRO PERÍODO LETIVO DE 2014. 1. PRE�MBULO 1.1 O

Maier, Rudolf Richard

151

EmNets 2006 Life Under your Feet 1 Life Under your Feet  

E-print Network

EmNets 2006 Life Under your Feet 1 Life Under your Feet: A Wireless Soil Ecology Sensor Network R the Beginning... EmNets 2006 Life Under your Feet 2 · The Cast · An ecologist: Katalin Szlavecz · An undergrad Step EmNets 2006 Life Under your Feet 3 · The sensors were thoroughly tested in the lab · 2 out of 6

Amir, Yair

152

UNIVERSIDADE DE BRASLIA PROGRAMA DE PS-GRADUAO EM ENSINO DE CINCIAS  

E-print Network

-80, 2011. Disponível em: http://www.portal.fae.ufmg.br/seer/index.php/ensaio/article/viewFile/309/715 Leia-162, 2000. Disponível em: http://www.portal.fae.ufmg.br/seer/index.php/ensaio/article/viewFile/21/52. 5 diferentes abordagens. Rev. Ensaio, v.13, n.3, p.67-80, 2011. Disponível em: http://www.portal.fae.ufmg.br/seer

Maier, Rudolf Richard

153

0.5setgray00.5setgray1 Determinao de coeficientes em equaes  

E-print Network

de Imagens em Medicina Nuclear · SPECT ­ Single Photon Emission Tomography, ­ p. 13/7 #12;Técnicas para Geração de Imagens em Medicina Nuclear · SPECT ­ Single Photon Emission Tomography, · PET ­ Positron Emission Tomograpy; ­ p. 13/7 #12;Técnicas para Geração de Imagens em Medicina Nuclear · SPECT

Cipolatti, Rolci

154

EMS-CO2 Welding: A New Approach to Improve Droplet Transfer Characteristics and Welding Formation  

Microsoft Academic Search

In this article, to improve the stability of droplet transfer and reduce the spatter of pure carbon dioxide gas shield welding (CO2 welding), we propose a new welding method called EMS-CO2 welding by applying an additional longitudinal electromagnetic field to a CO2 welding process (abbr. EMS-CO2 welding). The characteristics of droplet transfer, welding formation and microstructure between EMS-CO2 welding and

Jian Luo; Qian Luo; Xiangjie Wang; Xiaochuan Wang

2010-01-01

155

ADMINISTRATION AND COLLEGE MASTERS 343342 ADMINISTRATION Emergency Medical Service (EMS) .................................................... Bill Taylor  

E-print Network

ADMINISTRATION AND COLLEGE MASTERS 343342 ADMINISTRATION Emergency Medical Service (EMS .................................................. Adria Baker Intramural Sports. Lieberman Media Relations and Information ................................................ Margot Dimond

Richards-Kortum, Rebecca

156

Melasma extra-facial : avaliação clínica, histopatológica e imuno-histoquímica em estudo caso-controle.  

E-print Network

??Fundamentos: O melasma extra-facial é dermatose freqüente na prática clínica dermatológica. Apresenta características especiais em relação tanto aos aspectos clínicos como aos prováveis fatores etiopatogênicos.… (more)

Clarice Gabardo Ritter

2011-01-01

157

Administração peridural de morfina ou tramadol em cães: efeito analgésico e cardiorespiratório.  

E-print Network

??Objetivou-se com este estudo duplo cego avaliar o efeito analgésico e cardiorrespiratório da morfina ou tramadol quando utilizados via peridural, em cadelas submetidas à ovariossalpingohisterectomia… (more)

Celso Sawaya Neves

2009-01-01

158

General 4-week toxicity study with EMS in the rat.  

PubMed

In this subacute toxicity study, ethyl methanesulfonate (EMS) was administered daily by oral gavage to SPF-bred Wistar rats of both sexes at dose levels of 20, 60 and 180/120 mg/kg body weight (bw)/day for a period of 28 days (for 19 days in the high-dose group). A control group was treated similarly with the vehicle, bidistilled water, only. The groups comprised 10 animals per sex, which were sacrificed after 28 days, respectively 19 days in the high-dose group, of treatment. Additional five rats per sex and group were treated accordingly and then allowed a 14 days treatment-free recovery period. Additional six rats per sex and group (three rats per sex in the control group) were treated accordingly and used for hemoglobin adduct analysis after EMS exposure. All animals survived until their scheduled necropsy. Treatment with EMS had a direct dose-dependent effect on food consumption and consequently on body weight at doses > or =20mg/kgbw/day in male rats and at > or =60 mg/kgbw/day in females rats. Hence, treatment with the high dose of 180 mg/kgbw/day had to be interrupted for 9 days after which, the animals were re-dosed at 120 mg/kgbw/day. This dose was also poorly tolerated over the remaining two treatment weeks causing again a marked reduction in food consumption and body weight. A dose of 60 mg/kgbw/day was moderately tolerated over 4 weeks treatment with mean daily food consumption and body weight distinctly lower than in controls. Primary targets of systemic toxicity were the hematopoietic system, thymolymphatic system and sexual organs. Characteristic changes in hematology parameters were decreased red blood cell counts, hematocrit, and hemoglobin concentration. White blood cell counts were also decreased due to reduced lymphocyte and granulocyte populations of each fraction. The corresponding histopathology findings were fatty atrophy of bone marrow and minimal hypocellularity of the white pulp of the spleen. Similarly, treatment with EMS caused an involution of the thymolymphatic system characterized by decreased organ weight of thymus, lymph nodes, and spleen microscopically associated with atrophy of the thymus and hypocellularity of Peyer's patches, lymph nodes and the white pulp of the spleen. The effects on sexual organs included lower organ weight/reduced size for testes, epididymides, seminal vesicles, prostate, and uterus. Tubular atrophy, single cell necrosis of the germ cells and in epididymides reduced spermatozoa were recorded microscopically. The described findings occurred at doses of 60 and 180/120 mg/kgbw/day and were dose-dependent with regard to incidence and severity. Other target organs were the pancreas (acinar cell vacuolation), thyroid gland (follicular cell hypertrophy), and salivary gland (secretory depletion of convoluted ducts). The systemic exposure to EMS was monitored by hemoglobin ethylvaline adduct measurement. The concentration of hemoglobin ethylvaline adducts was linear with the dose and accumulated 11-26-fold over the treatment period. In summary, decreases in food consumption and body weight were the dose-limiting effects of treatment with EMS. Organ toxicity was characterized by depression of cell proliferation (hematopoiesis and spermatogenesis) and changes suggestive of reduced metabolism and/or physiological imbalances (e.g. thymolymphatic system and thyroid gland) without signs of inflammatory or necrotic lesions. For some findings, especially the effects on the thymolymphatic system and sexual organs, it cannot be excluded that starvation-like condition contributed to the occurrence of such changes. The low dose of 20 mg/kgbw/day was basically free of adverse effects despite of a clear evidence for hemoglobin adducts. PMID:19442710

Pfister, Thomas; Eichinger-Chapelon, Anne

2009-11-12

159

Epidemiology of major incidents: an EMS study from Pakistan  

PubMed Central

Background A major incident is defined as an event that owing to the number of casualties has the potential to overwhelm the available resources. This paper attempts to describe the incidence and epidemiology of major incidents dealt with by a government-run emergency medical service (EMS) in the Punjab province of Pakistan, a developing country in South Asia. A major incident in this EMS is defined as any incident that produces three or more patients, or any incident in which extraordinary resources are needed. Methods All the calls received by an EMS Rescue 1122 were studied over a 6-month period. Calls that were defined as major incidents were identified, and further details were sought from the districts regarding these incidents. Questions specifically asked were the type of incident, time of the incident, response time for the incident, the resources needed, and the number of dead and injured casualties. Retrospective data were collected from the submitted written reports. Results Road traffic crashes (RTCs) emerged as the leading cause of a major incident in the province of Punjab and also led to the greatest number of casualties, followed by fire incidents. The total number of casualties was 3,380, out of which 73.7% were RTC victims. There was a high rate of death on the scene (10.4%). Certain other causes of major incidents also emerged, including violence, gas explosions and drowning. Conclusion Road traffic crashes are the most common cause of a major incident in developing countries such as Pakistan. Injury prevention initiatives need to focus on RTCs. PMID:21798011

2011-01-01

160

Transmission characteristics of EM wave in a finite thickness plasma  

NASA Astrophysics Data System (ADS)

One of the key factors for solving the problems of re-entry communication interruption is electromagnetic (EM) wave transmission characteristics in a plasma. Theoretical and experimental studies were carried out on specific transmission characteristics for different plasma sheath characteristic under thin sheath condition in re-entry state. The paper presents systematic studies on the variations of wave attenuation characteristics versus plasma sheath thickness L, collision frequency ?, electron density n e and wave working frequency f in a ? 800mm high temperature shock tube. In experiments, L is set to 4 cm and 38 cm. ? is 2 GHz and 15 GHz. n e is from 1×1010 cm-3 to 1×1013 cm-3, and f is set to 2, 5, 10, 14.6 GHz, respectively. Meanwhile, Wentzel-Kramers-Brillouin (WKB) and finite-difference time-domain (FDTD) methods are adopted to carry out theoretical simulation for comparison with experimental results. It is found that when L is much larger than EM wavelength ? (thick sheath) and ? is large, the theoretical result is in good agreement with experimental one, when sheath thickness L is much larger than ?, while ? is relatively small, two theoretical results are obviously different from the experimental ones. It means that the existing theoretical model can not fully describe the contribution of ?. Furthermore, when L and ? are of the same order of magnitude (thin sheath), the experimental result is much smaller than the theoretical values, which indicates that the current model can not properly describe the thin sheath effect on EM attenuation characteristics.

Zhu, Nai-Yi; Huang, Li-Shun; Wu, Bin; Yu, Xi-Long; Wu, Run-Hui; Meng, Gang; Ren, Ai-Min; Hu, Xin-Tian

2013-04-01

161

SEI: Junior E&M I Course Materials - Electrodynamics  

NSDL National Science Digital Library

This is a collection of resources for teaching electrodynamics. Included are homework questions, concept tests, student tutorials, and information about common student difficulties in the topic and ways to address these difficulties. This material was developed as part of a education research-based course transformation for junior level E&M. All of the resources developed for this course are available, sorted by individual topic and type, at http://www.compadre.org/psrc/items/Relations.cfm?ID=7891. Because this topic is not typically taught in depth in the courses used in developing these course materials, these materials are less complete than the other sections.

Pollock, Steven J.; Chasteen, Stephanie V.

2010-09-24

162

A compulsator driven rapid-fire EM-gun  

SciTech Connect

A compulsator-driven railgun is an attractive alternative to the homopolar generator-inductor-switch configuration, especially for repetitive duty. A conceptual design of a rapid-fire EM-gun system is presented. The generator is sized to accelerate a 0.08-kg projectile to 2 to 3 km/s at a 60 pulse-per-second repetition rate. Initial design parameters are discussed, and example current and velocity waveforms are given. The generator is discharged at the proper phase angle to provide a current zero just as the projectile exits the muzzle of the railgun.

Pratap, S.B.; Bird, W.L.

1984-03-01

163

SEI: Junior E&M I Course Materials - Math Fundamentals  

NSDL National Science Digital Library

This is a collection of resources for teaching mathematical fundamentals of electro- and magnetostatics constructed over the course of four semesters of a transformed junior-level Electricity and Magnetism course. Included are homework questions, concept tests, and information about common student difficulties in the topic and ways to address these difficulties. This material was developed as part of a education research-based course transformation for junior level E&M. All of the resources developed for this course are available, sorted by individual topic and type, at http://www.compadre.org/psrc/items/Relations.cfm?ID=7891.

Pollock, Steven J.; Chasteen, Stephanie V.

2010-06-29

164

Hospital picks EMS from 3 guaranteed savings bids  

SciTech Connect

A Wheeling, WV medical center stipulated $54,000 guaranteed annual savings from all bidders when it selected an MCC Powers System 600 energy management system (EMS) from among several bidders. A DOE grant will reduce the payback period to one year. A staff energy audit was the basis for the guaranteed savings figure. Programming ease and the ability to display building systems were positive features of the System 600 besides the low bid, but visits to other facilities using the system were a major factor in the decision. (DCK)

Galvin, C.

1983-10-24

165

Aristarchus's <em>On the Sizes and Distances of the Sun and the Moonem>: Greek and Arabic Texts  

NASA Astrophysics Data System (ADS)

In the 1920s, T. L. Heath pointed out that historians of mathematics have "given too little attention to Aristarchus". This is still true today. The Greek text of Aristarchus's On the Sizes and Distances of the Sun and the Moonem> has received little attention; the Arabic editions virtually none. Much of what this text has to tell us about ancient and medieval mathematics and the mathematical sciences has gone unnoticed. It should be taken as an important source for our understanding of the mathematical sciences of the early Hellenistic period.

Berggren, J. L.; Sidoli, N.

2007-05-01

166

Efeitos da suplementação aguda de aspartato de arginina na fadiga muscular em voluntários treinados  

Microsoft Academic Search

RESUMO A atividade física influi em mecanismos específicos responsá- veis pela redução da produção de força e conseqüentemente à fadiga. A preocupação em melhorar o desempenho físico tem sido propostos; observamos que estudos dão atenção para reduzir acú- mulos dos metabólitos que diminuem a fadiga durante o exercício físico intenso, usando aminoácidos conhecidos por induzir mudan- ças metabólicas, entre eles

Ricardo Pombo Sales; Carlos Eduardo César Miné; Andréia Dellú Franco; Érika Lima Rodrigues; Renato de Souza e Silva; José Carlos Cogo; Rodrigo A. B. Lopes-Martins; Rodrigo Lazo Osorio; Wellington Ribeiro

2005-01-01

167

Efeito da vitamina C no ganho de peso e em parâmetros hematológicos de tambaqui  

Microsoft Academic Search

Resumo - O objetivo deste trabalho foi avaliar o efeito da suplementação dietária com ácido L-ascórbico (vitamina C) no ganho de peso e em parâmetros hematológicos de juvenis de tambaqui, Colossoma macropomum. Após dez semanas, em que foram alimentados com dietas contendo 0, 100 e 500 mg de ácido L-ascórbico por kg de ração, os peixes foram capturados e imediatamente

Edsandra Campos Chagas; Adalberto Luís Val

2003-01-01

168

Method for evaluating compatibility of commercial electromagnetic (EM) microsensor tracking systems with surgical and imaging tables  

NASA Astrophysics Data System (ADS)

Electromagnetic (EM) tracking systems have been successfully used for Surgical Navigation in ENT, cranial, and spine applications for several years. Catheter sized micro EM sensors have also been used in tightly controlled cardiac mapping and pulmonary applications. EM systems have the benefit over optical navigation systems of not requiring a line-of-sight between devices. Ferrous metals or conductive materials that are transient within the EM working volume may impact tracking performance. Effective methods for detecting and reporting EM field distortions are generally well known. Distortion compensation can be achieved for objects that have a static spatial relationship to a tracking sensor. New commercially available micro EM tracking systems offer opportunities for expanded image-guided navigation procedures. It is important to know and understand how well these systems perform with different surgical tables and ancillary equipment. By their design and intended use, micro EM sensors will be located at the distal tip of tracked devices and therefore be in closer proximity to the tables. Our goal was to define a simple and portable process that could be used to estimate the EM tracker accuracy, and to vet a large number of popular general surgery and imaging tables that are used in the United States and abroad.

Nafis, Christopher; Jensen, Vern; von Jako, Ron

2008-03-01

169

ISOLAMENTO E IDENTIFICAÇÃO DE BACTÉRIAS CANDIDATAS A PROBIÓTICOS EM CAMARÕES DA ESPÉCIE LITOPENAEUS VANNAMEI  

Microsoft Academic Search

RESUMO O objetivo desse trabalho foi isolar e identificar bactérias candidatas a probióticos do trato intestinal de camarões da espécie Litopenaeus vannamei, em diferentes fases de desenvolvimento. Foram utilizados camarões nas fases de recria e inicial (pós-larva) e de crescimento (juvenil), os quais eram adaptados à água doce da Fazenda BAHIA PESCA, especializada em aqüicultura, localizada no município de Santo

M. M. COSTA

170

NCLEO DE ESTUDOS EM DIREITO CIVIL CONSTITUCIONAL PROJETO DE PESQUISA VIRADA DE COPRNICO  

E-print Network

Jurídicas Contratuais e Responsabilidade Civil; (iv) Relações Jurídicas Familiares e Sucessão; (v) Ensino1 N�CLEO DE ESTUDOS EM DIREITO CIVIL CONSTITUCIONAL PROJETO DE PESQUISA VIRADA DE COP�RNICO ESTUDOS EM DIREITO CIVIL CONSTITUCIONAL ­ PROJETO DE PESQUISA VIRADA DE COP�RNICO, observadas as seguintes

Paraná, Universidade Federal do

171

UMA ANÁLISE DO CUSTO DE VIAGEM PARA A PRAIA DA AVENIDA EM MACEIÓ  

Microsoft Academic Search

A cidade de Maceió em Alagoas constitui uma cidade litorânea da Região Nordeste do Brasil dotada de beleza natural tais como praias e lagoas, as quais constituem atrativos para o turismo tanto nacional como internacional. Todavia, nesta o crescimento do setor turístico tem sido afetado pela poluição dos recursos ambientais, mais especificamente o despejo do esgoto em praias e lagoas.

Eliane Aparecida Pereira De Abreu; Agnaldo Gomes da Silva; Gilberto Gomes Da Silva Junior; Rebecca Suzannah Nascimento De Melo

2008-01-01

172

BSSDATA - um programa otimizado para filtragem de dados em radioastronomia solar  

Microsoft Academic Search

A partir de 1998, entrou em operação regular no INPE, em São José dos Campos, o Brazilian Solar Spectroscope (BSS). O BSS é dedicado às observações de explosões solares decimétricas com alta resolução temporal e espectral, com a principal finalidade de investigar fenômenos associados com a liberação de energia dos \\

A. R. F. Martinon; H. S. Sawant; F. C. R. Fernandes; S. Stephany; A. J. Preto; K. M. Dobrowolski

2003-01-01

173

BWR loss-of-coolant accident analysis capability of the WRAP-EM system  

Microsoft Academic Search

The modular computational system known as the Water Reactor Analysis Package (WRAP) has been extended to provide the computational tools required to perform a complete analysis of LOCAs in BWRs. The new system is known as the WRAP-EM (Evaluation Model) system and will be used by NRC in interpreting and evaluating reactor vendor EM methods and computed results. The system

M. R. Buckner; R. R. Beckmeyer; M. V. Gregory; R. L. Reed; W. G. Winn

1979-01-01

174

Potential cauchy-poisson waves generated by submarine eruptions of kick 'em Jenny volcano  

Microsoft Academic Search

Kick 'em Jenny is the only known currently active submarine volcano in the Lesser Antilles. The volcano has erupted at least 10 times since first being discovered in 1939 and the summit has shoaled from a depth of ~232 m in 1962 to its present-day depth of ~150 m. Kick 'em Jenny is located in a province of explosive volcanism,

M. S. Smith; J. B. Shepherd

1995-01-01

175

Uterus Image Segmentation Using Multi-feature EM Algorithm Based on Gabor Filter  

Microsoft Academic Search

In this work the image is segmented effectively based on texture feature by reducing the noise. For effective image segmentation Expectation-Maximization (EM) algorithm based on Gabor filter is used. The EM algorithm is applied on 2D Ultrasonic image of uterus and tested. The Gabor function has been recognized by its multiresolution properties and the precision of locating the texture features

S. Malarkhodi; R. S. D. W. Banu

2010-01-01

176

On the EM Algorithm and Bootstrap Approach Combination for Improving Satellite Image Fusion  

Microsoft Academic Search

This paper discusses EM algorithm and Bootstrap approach combination applied for the improvement of the satellite image fusion process. This novel satellite image fusion method based on estimation theory EM algorithm and reinforced by Bootstrap approach was successfully implemented and tested. The sensor images are firstly split by a Bayesian segmentation method to determine a joint region map for the

Tijani Delleji; Mourad Zribi; Ahmed Ben

2008-01-01

177

A redução dos níveis de cortisol sanguíneo através da técnica de relaxamento progressivo em nadadores  

Microsoft Academic Search

Reduction of blood cortisol levels through the progres- sive relaxation technique in swimmers Objetivo: Analisar os efeitos da técnica de relaxamento progressivo na redução\\/controle dos níveis de cortisol san- guíneo em nadadores durante determinado período de trei- namentos. Metodologia: Nadadores de ambos os sexos (n = 23) foram divididos em dois grupos: experimental - GE (n = 11), submetido a

Maurício Gattás; Bara Filho; Luiz Carlos Scipião Ribeiro; Renato Miranda; Mônica Tavares Teixeira

2002-01-01

178

Anxiety levels in EMS providers: Effects of violence and shift schedules  

Microsoft Academic Search

We tried to measure anxiety levels in emergency medical service (EMS) providers to determine the effects of (1) having had a violent encounter during a shift and (2) different shift schedules, conducting a prospective observational study over 3 months in an urban EMS system setting. A convenience sample of 23 EMTs and 40 EMT-Ps was observed. Anxiety levels were measured

Elisabeth Fowlie Mock; Keith D Wrenn; Seth W Wright; T. Chadwick Eustis; Corey M Slovis

1999-01-01

179

Presença de dentes permanentes irrompidos em escolares da região metropolitana de Porto Alegre  

Microsoft Academic Search

RESUMO Foi realizada uma pesquisa de campo em duas escolas da rede pública estadual de Porto Alegre, com a finalidade de verificar a presença de dentes permanentes irrompidos em crian- ças com faixa etária entre seis a dez anos. Foram examinadas 327 crianças, considerando as variáveis de idade, sexo e raça. Não foi observada diferença significativa para a época de

Karine Squeff; Guilherme Pessoa Cerveira; Luciane Quadrado Closs; Jose Antônio Bosio

180

Prevalência de sobrepeso\\/obesidade em crianças e adolescentes com constipação crônica funcional  

Microsoft Academic Search

RESUmO Objetivo: Avaliar a prevalência do sobrepeso\\/obesidade em um grupo de crianças com constipação crônica funcional. Métodos: Estudo retrospectivo com 257 crianças de dois a 15 anos com constipação crônica funcional diag- nosticada segundo critérios de Roma II, atendidas con- secutivamente em clínica terciária de gastroenterologia pediátrica. Informações demográficas, clínicas, diagnós - ticas e antropométricas foram obtidas de prontuários. O

Francisca Teresa V. Faleiros; Cristiane Camargo Omae; Cristiane Yoshie Nakazawa; Mary de Assis Carvalho; Nilton Carlos Machado

2008-01-01

181

Competência social e empatia: um estudo sobre resiliência com crianças em situação de pobreza  

Microsoft Academic Search

Social competence and empathy: Study about resilience with children in poverty Resumo O objetivo desse estudo foi avaliar a competência social e a empatia em crianças escolares que vivem em situação de po- breza. Participaram da pesquisa 100 crianças, de ambos os sexos, com idades entre seis e nove anos. Os instrumentos utilizados foram o Teste das Histórias Incompletas (THI)

Alessandra Marques Cecconello; Sílvia Helena Koller

2000-01-01

182

2.5D EM modeling in TIV conductive media Torgeir Wiik  

E-print Network

2.5D EM modeling in TIV conductive media Torgeir Wiik , Bjørn Ursin and Ketil Hokstad, Norwegian domain EM model- ing in conductive media, i.e. in media which are assumed invariant in one direction. Further, we consider media which are transversely isotropic in the vertical direction 1 #12;(TIV), thus

Ursin, Bjørn

183

Cryo-EM modeling by the molecular dynamics flexible fitting method  

PubMed Central

The increasing power and popularity of cryo-electron (cryo-EM) microscopy in structural biology brought about the development of so-called hybrid methods, which permit the interpretation of cryo-EM density maps beyond their nominal resolution in terms of atomic models. The Cryo-EM Modeling Challenge 2010 is the first community effort to bring together developers of hybrid methods as well as cryo-EM experimentalists. Participating in the challenge, the molecular dynamics flexible fitting (MDFF) method was applied to a number of cryo-EM density maps. The results are described here with special emphasis on the use of symmetry-based restraints to improve the quality of atomic models derived from density maps of symmetric complexes; on a comparison of the stereochemical quality of atomic models resulting from different hybrid methods; and on application of MDFF to electron crystallography data. PMID:22696404

Chan, Kwok-Yan; Trabuco, Leonardo G.; Schreiner, Eduard; Schulten, Klaus

2012-01-01

184

PERFIL DOS ACIDENTES POR LIQUIDOS AQUECIDOS EM CRIANÇAS ATENDIDAS EM CENTRO DE REFERÊNCIA DE FORTALEZA The Profile of Accidents by Hot Liquids in Children Attended at a Reference Center in Fortaleza  

Microsoft Academic Search

RESUMO As queimaduras são acidentes frequentes e representam a segunda causa de morte na infância. Este trabalho objetivou identificar o perfil dos acidentes em crianças queimadas por líquidos aquecidos. Estudo descritivo, realizado com 62 pais de crianças internadas em um Centro de Tratamento para Queimados, em Fortaleza, Ceará, no período de janeiro a junho de 2002. As variáveis estudadas foram:

Rita Neuma; Dantas Cavalcante; Érika Porto Xavier; Luiza Jane; Eyre de Souza

185

EMS1 gene expression in primary breast cancer: relationship to cyclin D1 and oestrogen receptor expression and patient survival  

Microsoft Academic Search

The EMS1 and CCND1 genes at chromosome 11q13 are amplified in about 15% of primary breast cancers but appear to confer different phenotypes in ER positive and ER negative tumours. Since there are no published data on EMS1 expression in large series of breast cancers we examined the relationship of EMS1 expression with EMS1 gene copy number and expression of

Rina Hui; Jonathon R Ball; R Douglas Macmillan; Frances S Kenny; Owen WJ Prall; Douglas H Campbell; Ann L Cornish; Richard A McClelland; Roger J Daly; John F Forbes; Roger W Blamey; Elizabeth A Musgrove; John FR Robertson; Robert I Nicholson; Robert L Sutherland

1998-01-01

186

THE WHITE DWARF IN EM CYGNI: BEYOND THE VEIL  

SciTech Connect

We present a spectral analysis of the Far Ultraviolet Spectroscopic Explorer (FUSE) spectra of the eclipsing double-line spectroscopic binary EM Cygni (EM Cyg), a Z Cam DN system. The FUSE spectrum, obtained in quiescence, consists of four individual exposures (orbits): two exposures, at orbital phases {phi} {approx} 0.65 and {phi} {approx} 0.90, have a lower flux; and two exposures, at orbital phases {phi} = 0.15 and 0.45, have a relatively higher flux. The change of flux level as a function of the orbital phase is consistent with the stream material (flowing over and below the disk from the hot spot region to smaller radii) partially masking the white dwarf. We carry out a spectral analysis of the FUSE data, obtained at phase 0.45 (when the flux is maximal), using synthetic spectra generated with the codes TLUSTY and SYNSPEC. Using a single white dwarf spectral component, we obtain a white dwarf temperature of 40, 000 K {+-} 1000 K, rotating at 100 km s{sup -1}. The white dwarf, or conceivably, the material overflowing the disk rim, shows suprasolar abundances of silicon, sulphur, and possibly nitrogen. Using a white dwarf+disk composite model, we obtain that the white dwarf temperature could be even as high as 50,000 K, contributing more than 90% of the FUV flux, and the disk contributing less than 10% must have a mass accretion rate reaching 10{sup -10} M{sub sun} yr{sup -1}. The single white dwarf model fits the absorption lines better than the white dwarf+disk model, but the white dwarf+disk model fits better the continuum in the shorter wavelengths. In both cases, however, we obtain that the white dwarf temperature is much higher than previously estimated. We emphasize the importance of modeling the spectra of EM Cyg around phase {phi} < 0.5, when the white dwarf and disk are facing the observer, and we suggest that the discrepancy between the present analysis and previous spectral analysis might be due to the occulting effect of the stream veiling the white dwarf and disk.

Godon, Patrick; Sion, Edward M. [Department of Astronomy and Astrophysics, Villanova University, Villanova, PA 19085 (United States); Barrett, Paul E. [United States Naval Observatory, Washington, DC 20392 (United States); Linnell, Albert P. [Department of Astronomy, University of Washington, Seattle, WA 98195 (United States)], E-mail: patrick.godon@villanova.edu, E-mail: edward.sion@villanova.edu, E-mail: barrett.paul@usno.navy.mil, E-mail: linnell@astro.washington.edu, E-mail: godon@stsci.edu

2009-07-10

187

A Gentle Tutorial of the EM Algorithm and its Application to Parameter Estimation for Gaussian Mixture and Hidden Markov Models  

Microsoft Academic Search

We describe the maximum-likelihood parameter estimation problem and how the Expectation- Maximization (EM) algorithm can be used for its solution. We first describe the abstract form of the EM algorithm as it is often given in the literature. We then develop the EM pa- rameter estimation procedure for two applications: 1) finding the parameters of a mixture of Gaussian densities,

Jeff A. Bilmes

1997-01-01

188

Efeitos da monensina sobre a fermentação e sensibilidade de bactérias ruminais de bovinos sob dietas ricas em volumoso ou concentrado  

Microsoft Academic Search

RESUMO - Objetivou-se avaliar os efeitos da monensina sobre as mudanças nos padrões de fermentação e resistência à perda do potássio intracelular das bactérias ruminais provenientes de quatro bovinos recebendo dietas ricas em volumoso ou concentrado. As bactérias obtidas por centrifugação diferencial foram resuspensas em um meio pobre em potássio, no qual foi medida a perda do p otássio intracelular,

Rogério de Paula Lana; James B. Russell

2001-01-01

189

The EM SSAB Annual Work Plan Process: Focusing Board Efforts and Resources - 13667  

SciTech Connect

One of the most daunting tasks for any new member of a local board of the Environmental Management Site Specific Advisory Board (EM SSAB) is to try to understand the scope of the clean-up activities going on at the site. In most cases, there are at least two or three major cleanup activities in progress as well as monitoring of past projects. When planning for future projects is added to the mix, the list of projects can be long. With the clean-up activities involving all major environmental media - air, water, soils, and groundwater, new EM SSAB members can find themselves totally overwhelmed and ineffective. Helping new members get over this initial hurdle is a major objective of EM and all local boards of the EM SSAB. Even as members start to understand the size and scope of the projects at a site, they can still be frustrated at the length of time it takes to see results and get projects completed. Many project and clean-up timelines for most of the sites go beyond 10 years, so it's not unusual for an EM SSAB member to see the completion of only 1 or 2 projects over the course of their 6-year term on the board. This paper explores the annual work planning process of the EM SSAB local boards, one tool that can be used to educate EM SSAB members into seeing the broader picture for the site. EM SSAB local work plans divide the site into projects focused on a specific environmental issue or media such as groundwater and/or waste disposal options. Projects are further broken down into smaller segments by highlighting major milestones. Using these metrics, local boards of the EM SSAB can start to quantify the effectiveness of the project in achieving the ultimate goal of site clean-up. These metrics can also trigger board advice and recommendations for EM. At the beginning of each fiscal year, the EM SSAB work plan provides a road map with quantifiable checkpoints for activities throughout the year. When the work plans are integrated with site-specific, enforceable regulatory milestones, they can provide a comprehensive work plan for not only the board, but also regulators, site contractors, and DOE. Because the work plans are reviewed and approved by DOE, they carry some weight in holding local boards of the EM SSAB accountable. This structure provides the basis for local boards to achieve their primary function, to provide DOE with information, advice, and recommendations concerning issues affecting the EM program at the site. (authors)

Young, Ralph [Paducah Citizens Advisory Board (United States)] [Paducah Citizens Advisory Board (United States)

2013-07-01

190

QCD effective potential with strong U(1)em magnetic fields  

NASA Astrophysics Data System (ADS)

We derive the analytic expression for the one-loop SU(Nc) QCD effective potential including Nf flavor quarks which nonlinearly interact with the chromomagnetic background field and the external U(1)em magnetic field. After the renormalization of couplings and fields, we obtain the correct one-loop ? functions of both QCD and QED, and the resulting effective potential satisfies the renormalization group equation. We investigate the effect of the magnetic field on the QCD vacuum by using the effective potential, in particular for the color SU(3) case with the three flavors (u ,d,s). Our result shows that the chromomagnetic field prefers to be parallel to the external magnetic field. Furthermore, quark loop contributions to the effective potential with the magnetic field enhance gluonic contributions, and then the chromomagnetic condensate increases with an increasing magnetic field. This result supports the recent observed gluonic magnetic catalysis at zero-temperature in lattice QCD.

Ozaki, Sho

2014-03-01

191

EM Properties of Magnetic Minerals at RADAR Frequencies  

NASA Technical Reports Server (NTRS)

Previous missions to Mars have revealed that Mars surface is magnetic at DC frequency. Does this highly magnetic surface layer attenuate RADAR energy as it does in certain locations on Earth? It has been suggested that the active magnetic mineral on Mars is titanomaghemite and/or titanomagnetite. When titanium is incorporated into a maghemite or magnetite crystal, the Curie temperature can be significantly reduced. Mars has a wide range of daily temperature fluctuations (303K - 143K), which could allow for daily passes through the Curie temperature. Hence, the global dust layer on Mars could experience widely varying magnetic properties as a function of temperature, more specifically being ferromagnetic at night and paramagnetic during the day. Measurements of EM properties of magnetic minerals were made versus frequency and temperature (300K- 180K). Magnetic minerals and Martian analog samples were gathered from a number of different locations on Earth.

Stillman, D. E.; Olhoeft, G. R.

2005-01-01

192

EM modeling of RF drive in DTL tank 4  

SciTech Connect

A 3-D MicroWave Studio model for the RF drive in the LANSCE DTL tank 4 has been built. Both eigensolver and time-domain modeling are used to evaluate maximal fields in the drive module and RF coupling. The LANSCE DTL tank 4 has recently been experiencing RF problems, which may or may not be related to its replaced RF coupler. This situation stimulated a request by Dan Rees to provide EM modeling of the RF drive in the DTL tank 4 (T4). Jim O'Hara provided a CAD model that was imported into the CST Microwave Studio (MWS) and after some modifications became a part of a simplified MWS model of the T4 RF drive. This technical note describes the model and presents simulation results.

Kurennoy, Sergey S. [Los Alamos National Laboratory

2012-06-19

193

SEI: Junior E&M I Course Materials - Tutorials  

NSDL National Science Digital Library

This collection of tutorials and tutorial pre-tests was constructed for a transformed junior-level Electricity and Magnetism course. These tutorials are weekly student sessions, modeled after research-validated curricula developed at the University of Washington. Using these materials in study/recitation sections, students work in small groups with the instructor as a learning coach. The materials are designed to target known student difficulties, to elicit and develop conceptual understanding and math/physics connections. They also help faculty listen to student reasoning, get a clearer sense of student ideas, and determine where they are struggling. This material was developed as part of a education research-based course transformation for junior level E&M. All of the resources developed for this course are available, sorted by individual topic and type, at http://www.compadre.org/psrc/items/Relations.cfm?ID=7891.

Pollock, Steven J.; Chasteen, Stephanie V.; Kinney, Edward; Dubson, Michael

2010-06-10

194

SEI: Junior E&M I Course Materials - Homework  

NSDL National Science Digital Library

This homework question collection was constructed over the course of four semesters of a transformed junior-level Electricity and Magnetism course on electro- and magneto-statics. Many questions are related to textbook problems, but with added elements of explanation, sense-making, estimation or approximation, real-world connections, and multiple-representations. Not all these homework questions were used in the course design project. Some problems used include detailed instructor notes, including statistics on student performance on each homework problem assigned. The homework solutions are only available to instructors by writing the authors, Steven.Pollock@colorado.edu This material was developed as part of a education research-based course transformation for junior level E&M. All of the resources developed for this course are available, sorted by individual topic and type, at http://www.compadre.org/psrc/items/Relations.cfm?ID=7891.

Pollock, Steven J.; Chasteen, Stephanie V.

2010-06-10

195

EM Structure-Based Accelerators Working Group Summary  

SciTech Connect

This Working Group (WG) focused on EM Structure-Based Accelerators, which covers a broad area of mechanisms and experiments. Topics covered included dielectric wakefield accelerators (DWA), photonic bandgap accelerators (PBGA), inverse free electron lasers (IFEL), vacuum laser accelerators (VLA), other novel schemes, and supporting analysis and modeling. In addition, this WG was tasked at the Workshop with developing conceptual (strawman) designs for a 1-GeV accelerator system based upon any of the experimentally-proven approaches covered in this WG. Two strawmen designs were developed based upon IFELs and DWAs. The presentations given and strawmen designs indicate great progress has been made in many areas. Proof-of-principle experiments will occur shortly in PBGA and VLA. Other well-proven devices, such as IFELs, are becoming accepted as 'workhorse' providers of microbunches.

Kimura, W.D. [STI Optronics, Inc., 2755 Northup Way, Bellevue, WA 98004 (United States); Lidia, S.M. [Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (United States)

2004-12-07

196

Speech articulator measurements using low power EM-wave sensors  

SciTech Connect

Very low power electromagnetic (EM) wave sensors are being used to measure speech articulator motions as speech is produced. Glottal tissue oscillations, jaw, tongue, soft palate, and other organs have been measured. Previously, microwave imaging (e.g., using radar sensors) appears not to have been considered for such monitoring. Glottal tissue movements detected by radar sensors correlate well with those obtained by established laboratory techniques, and have been used to estimate a voiced excitation function for speech processing applications. The noninvasive access, coupled with the small size, low power, and high resolution of these new sensors, permit promising research and development applications in speech production, communication disorders, speech recognition and related topics. {copyright} {ital 1998 Acoustical Society of America.}

Holzrichter, J.F.; Burnett, G.C.; Ng, L.C. [Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551 (United States)] [Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551 (United States); Lea, W.A. [Speech Science Institute, P.O. Box 240428, Apple Valley, Minnesota 55124 (United States)] [Speech Science Institute, P.O. Box 240428, Apple Valley, Minnesota 55124 (United States)

1998-01-01

197

Integrated EM & Thermal Simulations with Upgraded VORPAL Software  

SciTech Connect

Nuclear physics accelerators are powered by microwaves which must travel in waveguides between room-temperature sources and the cryogenic accelerator structures. The ohmic heat load from the microwaves is affected by the temperature-dependent surface resistance and in turn affects the cryogenic thermal conduction problem. Integrated EM & thermal analysis of this difficult non-linear problem is now possible with the VORPAL finite-difference time-domain simulation tool. We highlight thermal benchmarking work with a complex HOM feed-through geometry, done in collaboration with researchers at the Thomas Jefferson National Accelerator Laboratory, and discuss upcoming design studies with this emerging tool. This work is part of an effort to generalize the VORPAL framework to include generalized PDE capabilities, for wider multi-physics capabilities in the accelerator, vacuum electronics, plasma processing and fusion R&D fields, and we will also discuss user interface and algorithmic upgrades which facilitate this emerging multiphysics capability.

D.N. Smithe, D. Karipides, P. Stoltz, G. Cheng, H. Wang

2011-03-01

198

EM Structure-Based Accelerators Working Group Summary  

NASA Astrophysics Data System (ADS)

This Working Group (WG) focused on EM Structure-Based Accelerators, which covers a broad area of mechanisms and experiments. Topics covered included dielectric wakefield accelerators (DWA), photonic bandgap accelerators (PBGA), inverse free electron lasers (IFEL), vacuum laser accelerators (VLA), other novel schemes, and supporting analysis and modeling. In addition, this WG was tasked at the Workshop with developing conceptual (strawman) designs for a 1-GeV accelerator system based upon any of the experimentally-proven approaches covered in this WG. Two strawmen designs were developed based upon IFELs and DWAs. The presentations given and strawmen designs indicate great progress has been made in many areas. Proof-of-principle experiments will occur shortly in PBGA and VLA. Other well-proven devices, such as IFELs, are becoming accepted as "workhorse" providers of microbunches.

Kimura, W. D.; Lidia, S. M.

2004-12-01

199

Benchmarking a derivative-free minimax optimizer for EM design  

NASA Astrophysics Data System (ADS)

The paper presents a model-based derivative-free minimax optimizer and a benchmarking methodology. The optimizer is dedicated to such simulation-based design scenarios, when a single simulation is time-consuming and not very accurate, and so when fast improvement of design is expected rather then high accuracy optimization. A benchmarking methodology is formulated to compare efficiency of optimizers in such scenarios. A set of electromagnetic (EM) designs, for which a design simulation involves solution of very large partial differential equations, is used to exemplify the methodology. Presented results demonstrate how accuracy requirements and computational budget change ranking of optimizers. The proposed optimizer is shown to provide competetively rapid and reliable initial design improvement for modest 5-10% tolerance, but for higher accuracy demands and larger computational budget other solvers become more competitive.

Opalski, Leszek J.

200

TrakEM2 software for neural circuit reconstruction.  

PubMed

A key challenge in neuroscience is the expeditious reconstruction of neuronal circuits. For model systems such as Drosophila and C. elegans, the limiting step is no longer the acquisition of imagery but the extraction of the circuit from images. For this purpose, we designed a software application, TrakEM2, that addresses the systematic reconstruction of neuronal circuits from large electron microscopical and optical image volumes. We address the challenges of image volume composition from individual, deformed images; of the reconstruction of neuronal arbors and annotation of synapses with fast manual and semi-automatic methods; and the management of large collections of both images and annotations. The output is a neural circuit of 3d arbors and synapses, encoded in NeuroML and other formats, ready for analysis. PMID:22723842

Cardona, Albert; Saalfeld, Stephan; Schindelin, Johannes; Arganda-Carreras, Ignacio; Preibisch, Stephan; Longair, Mark; Tomancak, Pavel; Hartenstein, Volker; Douglas, Rodney J

2012-01-01

201

EM-based measurement fusion for HRR radar centroid processing  

NASA Astrophysics Data System (ADS)

This paper develops a new algorithm for high range resolution (HRR) radar centroid processing for scenarios where there are closely spaced objects. For range distributed targets with multiple discrete scatterers, HRR radars will receive detections across multiple range bins. When the resolution is very high, and the target has significant extent, then it is likely that the detections will not occur in adjacent bins. For target tracking purposes, the multiple detections must be grouped and fused to create a single object report and a range centroid estimate is computed since the detections are range distributed. With discrete scatterer separated by multiple range bins, then when closely spaced objects are present there is uncertainty about which detections should be grouped together for fusion. This paper applies the EM algorithm to form a recursive measurement fusion algorithm that segments the data into object clusters while simultaneously forming a range centroid estimate with refined bearing and elevation estimates.

Slocumb, Benjamin J.; Blair, W. Dale

2002-08-01

202

Linear array implementation of the EM algorithm for PET image reconstruction  

SciTech Connect

The PET image reconstruction based on the EM algorithm has several attractive advantages over the conventional convolution back projection algorithms. However, the PET image reconstruction based on the EM algorithm is computationally burdensome for today`s single processor systems. In addition, a large memory is required for the storage of the image, projection data, and the probability matrix. Since the computations are easily divided into tasks executable in parallel, multiprocessor configurations are the ideal choice for fast execution of the EM algorithms. In tis study, the authors attempt to overcome these two problems by parallelizing the EM algorithm on a multiprocessor systems. The parallel EM algorithm on a linear array topology using the commercially available fast floating point digital signal processor (DSP) chips as the processing elements (PE`s) has been implemented. The performance of the EM algorithm on a 386/387 machine, IBM 6000 RISC workstation, and on the linear array system is discussed and compared. The results show that the computational speed performance of a linear array using 8 DSP chips as PE`s executing the EM image reconstruction algorithm is about 15.5 times better than that of the IBM 6000 RISC workstation. The novelty of the scheme is its simplicity. The linear array topology is expandable with a larger number of PE`s. The architecture is not dependant on the DSP chip chosen, and the substitution of the latest DSP chip is straightforward and could yield better speed performance.

Rajan, K.; Patnaik, L.M.; Ramakrishna, J. [Indian Institute of Science, Bangalore (India)] [Indian Institute of Science, Bangalore (India)

1995-08-01

203

DOE-EM privatization and the 2006 Plan: Principles for procurement policies and risk management  

SciTech Connect

The Department of Energy`s Office of Environmental Remediation and Waste Management (EM) has recently set in place programs to restructure the strategic planning mechanism that will drive its clean-up schedule, The 2006 Plan, and to create a new set of business relationships with private contractors that will reduce costs--privatization. Taken together, the 2006 Plan and privatization will challenge EM to create new business practices to recast its risk management policies to support these initiatives while ensuring that its responsibilities toward the environment, human health, and worker safety (ES and H) are maintained. This paper argues that the 2006 Plan has transformed EM`s traditional, bottoms-up approach based on technical dictates to a top-down approach based on management goals--a transformation from an engineering problem to an economic problem. The 2006 Plan evolved from EM`s Ten-Year Plan, and seeks to convert the largely open-ended planning approach previously undertaken by EM to a plan bounded by time and dollars. The plan emphasizes making tradeoffs and choosing activities that deliver the most clean-up for the dollar. It also recognizes that each major player--stakeholders, DOE, OMB and Congress--has distinct interests that must be resolved if the process is to succeed. This, in turn, has created the need for a corresponding transformation in risk management practices from compliance-driven to benefit/cost-driven.

Bjornstad, D.J.; Jones, D.W.; Duemmer, C.L.

1997-08-01

204

Queda dos homic?dios em S?o Paulo, Brasil: uma an?lise descritiva  

PubMed Central

Objetivo Descrever a evolução da mortalidade por homicídios no Município de São Paulo segundo tipo de arma, sexo, raça ou cor, idade e áreas de exclusão/inclusão social entre 1996 e 2008. Métodos Estudo ecológico de série temporal. Os dados sobre óbitos ocorridos no Município foram coletados da base de dados do Programa de Aprimoramento das Informações sobre Mortalidade, seguindo a Classificação Internacional de Doenças, Décima Revisão (CID-10). Foram calculadas as taxas de mortalidade por homicídio (TMH) para a população total, por sexo, raça ou cor, faixa etária, tipo de arma e área de exclusão/inclusão social. As TMH foram padronizadas por idade pelo método direto. Foram calculados os percentuais de variação no período estudado. Para as áreas de exclusão/inclusão social foram calculados os riscos relativos de morte por homicídio. Resultados As TMH apresentaram queda de 73,7% entre 2001 e 2008. Foi observada redução da TMH em todos os grupos analisados, mais pronunciada em homens (?74,5%), jovens de 15 a 24 anos (?78,0%) e moradores de áreas de exclusão social extrema (?79,3%). A redução ocorreu, sobretudo, nos homicídios cometidos com armas de fogo (?74,1%). O risco relativo de morte por homicídio nas áreas de exclusão extrema (tendo como referência áreas com algum grau de exclusão social) foi de 2,77 em 1996, 3,9 em 2001 e 2,13 em 2008. Nas áreas de alta exclusão social, o risco relativo foi de 2,07 em 1996 e 1,96 em 2008. Conclusões Para compreender a redução dos homicídios no Município, é importante considerar macrodeterminantes que atingem todo o Município e todos os subgrupos populacionais e microdeterminantes que atuam localmente, influenciando de forma diferenciada os homicídios com armas de fogo e os homicídios na população jovem, no sexo masculino e em residentes em áreas de alta exclusão social. PMID:21390415

Peres, Maria Fernanda Tourinho; Vicentin, Diego; Nery, Marcelo Batista; de Lima, Renato Sergio; de Souza, Edinilsa Ramos; Cerda, Magdalena; Cardia, Nancy; Adorno, e Sergio

2012-01-01

205

Ondas de choque em jatos de quasares e objetos BL Lacertae  

NASA Astrophysics Data System (ADS)

Este trabalho é parte de um projeto que vem sendo realizado há dois anos no CRAAM, cujos objetivos principais são analisar e aplicar um modelo generalizado de ondas de choque em jatos relativísticos de plasma, presentes em quasares e objetos BL Lacertae, para explicar a variabilidade observada nestes objetos. O método consiste em uma decomposição de curvas de luz em séries de explosões similares, em várias freqüências, baseando-se em uma evolução espectro-temporal média das explosões. A partir da evolução média, um ajuste de cada explosão é feito com base em equações empíricas, modificando-se apenas parâmetros específicos de cada explosão. Inicialmente o modelo foi aplicado ajustando-se as curvas de luz a explosões delineadas por uma evolução do choque em três estágios, segundo a predominância do processo de emissão: síncrotron, Compton e adiabático. Entretanto, nesta nova fase de projeto, visando uma parametrização mais concisa, uma otimização do algoritmo de ajuste e uma convergência mais rápida, a formulação para cada evento foi assumida com uma evolução em apenas dois estágios: subida e descida. Isto possibilitou uma ótima delineação das curvas de luz das fontes OV236, OJ287, 3C273 e BL Lac, entre 1980 e 2000, nas freqüências 4.8, 8.0, 14.5 e 22 GHz, utilizando-se dados do Observatório da Universidade de Michigan, do Observatório do Itapetinga (Atibaia SP) e do Observatório Metsähovi. Como conclusões importantes, verificou-se que: os parâmetros ajustados descrevem o comportamento do jato; os valores do índice que descreve a expansão do jato sugerem que o mesmo se expande de uma forma não-cônica; o campo magnético é turbulento atrás da frente de choque; e as peculiaridades das explosões são devidas à influência de grandezas tais como o coeficiente da distribuição espectral de energia dos elétrons, a intensidade de campo magnético e o fator de feixe Doppler, no início do choque.

Melo, F. E.; Botti, L. C. L.

2003-08-01

206

EMS Provider Assessment of Vehicle Damage Compared to a Professional Crash Reconstructionist  

PubMed Central

Objective To determine the accuracy of EMS provider assessments of motor vehicle damage, when compared to measurements made by a professional crash reconstructionist. Methods EMS providers caring for adult patients injured during a motor vehicle crash and transported to the regional trauma center in a midsized community were interviewed upon ED arrival. The interview collected provider estimates of crash mechanism of injury. For crashes that met a preset severity threshold, the vehicle’s owner was asked to consent to having a crash reconstructionist assess their vehicle. The assessment included measuring intrusion and external auto deformity. Vehicle damage was used to calculate change in velocity. Paired t-test and correlation were used to compare EMS estimates and investigator derived values. Results 91 vehicles were enrolled; of these 58 were inspected and 33 were excluded because the vehicle was not accessible. 6 vehicles had multiple patients. Therefore, a total of 68 EMS estimates were compared to the inspection findings. Patients were 46% male, 28% admitted to hospital, and 1% died. Mean EMS estimated deformity was 18” and mean measured was 14”. Mean EMS estimated intrusion was 5” and mean measured was 4”. EMS providers and the reconstructionist had 67% agreement for determination of external auto deformity (kappa 0.26), and 88% agreement for determination of intrusion (kappa 0.27) when the 1999 Field Triage Decision Scheme Criteria were applied. Mean EMS estimated speed prior to the crash was 48 mph±13 and mean reconstructionist estimated change in velocity was 18 mph±12 (correlation -0.45). EMS determined that 19 vehicles had rolled over while the investigator identified 18 (kappa 0.96). In 55 cases EMS and the investigator agreed on seatbelt use, for the remaining 13 cases there was disagreement (5) or the investigator was unable to make a determination (8) (kappa 0.40). Conclusions This study found that EMS providers are good at estimating rollover. Vehicle intrusion, deformity, and seatbelt use appear to be more difficult to estimate with only fair agreement with the crash reconstructionist. As expected, the EMS provider estimated speed prior to the crash does not appear to be a reasonable proxy for change in velocity. PMID:21815732

Lerner, E. Brooke; Cushman, Jeremy T.; Blatt, Alan; Lawrence, Richard; Shah, Manish N.; Swor, Robert; Brasel, Karen; Jurkovich, Gregory J.

2011-01-01

207

User's guide for the PWR LOCA analysis capability of the WRAP-EM system  

SciTech Connect

The Water Reactor Analysis Package (WRAP) has been expanded to provide the capability to analyze loss-of-coolant accidents (LOCAs) in both pressurized water reactors (PWRs) and boiling water reactors (BWRs) by using evaluation models (EMs). The input specifications for modules in the WRAP-EM system are presented in this document along with the JOSHUA input templates. This document, along with the WRAP user's guide, provides a step-by-step procedure for setting up a PWR data base for the WRAP-EM system. 12 refs.

Beranek, F; Gregory, M V

1980-02-01

208

EM Wake-Sleep Shiro.Ikeda@brain.riken.go.jp  

E-print Network

­EM Wake-Sleep ­ 21 2-1 Shiro.Ikeda@brain.riken.go.jp 1 (Latent Variable) 2 2.1 -5 -2.5 0 2.5 5 x+1), p(x; )) t+1 6 #12;3.3 Wake-Sleep EM G. Hinton EM Wake-Sleep [6] Helmholtz Helmholtz Helmholtz Helmholtz 6 M D q(y|x; ) p(x, y; ) 2 Wake-Sleep t+1 D M KL(q ,p )KL(p ,q ) t+1 t () ()() () t 7: Wake

Ikeda, Shiro

209

Investigating the source of contaminated plumes downstream of the Alborz Sharghi coal washing plant using EM34 conductivity data, VLF-EM and DC-resistivity geophysical methods  

NASA Astrophysics Data System (ADS)

Coal washing factories may create serious environmental problems due to pyrite oxidation and acid mine drainage generation from coal waste piles on nearby land. Infiltration of pyrite oxidation products through the porous materials of the coal waste pile by rainwater cause changes in the conductivity of underground materials and groundwater downstream of the pile. Electromagnetic and electrical methods are effective for investigation and monitoring of the contaminated plumes caused by coal waste piles and tailings impoundments. In order to investigate the environmental impact from a coal waste pile at the Alborz Sharghi coal washing plant, an EM34 ground conductivity meter was used on seven parallel lines in an E-W direction, downstream of the waste pile. Two-dimensional resistivity models obtained by the inversion of EM34 conductivity data identified conductive leachate plumes. In addition, quasi-3D inversion of EM34 data has confirmed the decreasing resistivity at depth due to the contaminated plumes. Comparison between EM34, VLF and DC-resistivity datasets, which were acquired for similar survey lines, agree well in identifying changes in the resistivity trend. The EM34 and DC-resistivity sections have greater similarity and better smoothness rather than those of the VLF model. Two-dimensional inversion models of these methods have shown some contaminated plumes with low resistivity.

Shiraz, Farzin Amirkhani; Ardejani, Faramarz Doulati; Moradzadeh, Ali; Arab-Amiri, Ali Reza

2013-01-01

210

Serodiagnosis of alveolar echinococcosis: detection of antibody against EM18 in patients and rodents.  

PubMed

An international collaborative study on echinococcosis has been carried out for the establishment of a simple means for differential serodiagnosis of alveolar echinococcosis (AE) from other parasitic diseases including cystic echinococcosis (CE). The main candidate epitope is Em18 (previously undescribed epitope of a low molecular weight protein of 18.5 kDa). Evaluation of the usefulness of Em18 is introduced in this review paper. Serum samples showing antibody response against Em18 are exclusively from AE. The predominant IgG subclass recognizing Em18 is IgG4 or IgG1 or IgG4 + IgG1 but never IgG2. There are good correlations between (1) the antibody response against Em18 and the presence of active lesions and (2) the antibody response against Em18 and the Em2-ELISA values. Em18 is, therefore, expected to be reasonably reliable and useful for differentiation of active AE from inactive AE. A new ELISA system using a partially purified Em18 enriched fraction (PP-Em 18/16-ELISA) has been evaluated for serodiagnosis of AE compared with Em2plus-ELISA. A total of 194 serum samples were examined: 127 sera from AE (79) and CE (48) in China where both AE and CE are endemic, 21 sera from CE in Australia where CE only exists, 28 sera from cysticercosis (21), paragonimiasis (5) or sparganasis (2) in Korea where no indigenous AE nor CE exists and 11 normal sera. Antibody levels by PP-Em18/16-ELISA were much higher in AE than in CE and it was also true for commercially available Em2plus-ELISA. Some of CE from China showed exceptionally higher levels of antibody in comparison with those of CE from Australia. It is suggested that these strongly positive cases of CE from China may have been exposed to both species of Echinococcus. Although most of sera from paragonimiasis showed high antibody levels by Emplus-ELISA, they were negative by PP-Em18/16-ELISA. Therefore, PP-Em18/16-ELISA is expected to be more reliable for differentiation of AE from CE and others especially in Asian countries where paragonimiasis is still not rare. Antibody responses in rodents naturally infected with E. multilocularis: Serum samples from the wild vole, Clethrionomys rufocanus bedfordiae, infected with E. multilocularis showed similar antibody responses as in AE patients, whereas those from Norway rats, Rattus norvegicus, showed almost none. The latter rodents were simultaneously infected with Taenia taeniaeformis but showed no antibody response against T. taeniaeformis either. Therefore, we speculate that Norway rats may only be infected with E. multilocularis under some immunosuppressed conditions or genetic unresponsiveness. It is stressed that Em18 is highly specific to E. multilocularis, and antibody response against Em18 is reasonably reliable for differentiation of AE from other helminthic infections by Western blot and ELISA in humans and may be useful for detection of domestic animals contaminated with E. multilocularis in the endemic area. PMID:9656361

Akira, I

1997-01-01

211

Simulating Suspended Silt Concentrations in the Ems Estuary, The Netherlands  

NASA Astrophysics Data System (ADS)

1 Introduction The Ems Estuary is situated in the North-east Netherlands on the border with Germany. Its area, including the tidal river and excluding the outer delta, is ± 500 km2. The area of the outer delta is ± 100 km2. The length of the estuary from the inlet to the town of Leer in Germany is approximately 75 km. The mean tidal range varies over years (de Jonge, 1992), but is approximately 2.3 m near the island of Borkum (tidal inlet) and approximately 3.2 m near the town of Emden in Germany. The estuary receives water from the rain-fed River Ems (approximately 115 m3/s on average). A second much smaller freshwater input emanates from the small canalized river Westerwoldsche Aa (12.5 m3/s on average). These discharges vary strongly within and between years. The result of the interaction between freshwater discharge and seawater brought in by the tide is a salinity gradient, the length and position of which is strongly dependent on the water discharge by the rivers. The present morphology of the estuary is the result of natural processes such as tidal currents, wind and wave driven currents and river discharge, resulting in sediment trans-port and sedimentation and erosion patterns. These natural processes are affected by human interferences like maintenance dredging of the navigation channels, land reclamation, building of dikes, etc. The greatest changes in the last 50 years in the physical functioning of the Ems estuary have been the increased sea level and tidal range, the increased amplitude and frequency of storm surge, and greatly increased turbidity and sediment concentrations (particularly near the estuarine turbidity maximum). Much of the changes can be traced directly or indirectly to anthropogenic influence. 2 Aim and approach We studied the hydrodynamics and morphodynamics of the Ems estuary. One of the aims was to gain more insight in the behaviour of the suspended silt concentrations in the estuary and the anthropogenic influence thereon. We applied a beta release of the state-of-the-art Delft3D numerical model for this purpose. The model includes a new sediment transport module published by Van Rijn (2007, 2007a). The vertical distribution of the suspended sediment concentration in the transport module depends on the effective settling velocity of the sediment, the bed shear velocity and the turbulence. The silt transport is simulated every time step together with the flow (online), which means that the impact of the calculated concentration is accounted for in the hydrodynamics. Major challenge was to accurately simulate the relatively high suspended silt concentrations observed near the estuarine turbidity maximum. 3 Results The paper will compare observed and predicted water levels, salinity distributions and suspended silt concentrations. Figure 1 shows an example of predicted depth-averaged suspended silt concentrations during spring high tide without waves. Under these conditions the depth-averaged concentrations decrease from about 2 kg/m3 in the Unterems (upstream of Emden) to almost zero seaward of Borkum. PIC Figure 1: Figure 2 Observed and predicted salinities in the upper part of the water column along the estuary The presence of waves will increase the concentrations on the shoals but have a limited effect on the concentrations in the channels. Figure 2 presents observed and predicted salinities along the estuary. The model results encouragingly agree with the observations. PIC 4 References De Jonge, V.N., 1992. Tidal flow and residual flow in the Ems estuary. Estuarine, Coastal and Shelf Science, 34: 1-22. Van Rijn, L.C., 2007. Unified View of Sediment Transport by Currents and Waves. I: Initiation of Motion, Bed Roughness, and Bed-Load Transport. Journal of Hydraulic Engineering, 133(6): 649-667. Van Rijn, L.C., 2007a. Unified View of Sediment Transport by Currents and Waves. II: Suspended Transport. Journal of Hydraulic Engineering, 133(6): 668-689.

Grasmeijer, B. T.

2009-04-01

212

MINUTA DE PARECER DA COMISSO INTERNA DE SUPERVISO O Pleno da Comisso Interna de Superviso dos Cargos Tcnico-Administrativos em Educao da  

E-print Network

". Neste Of�cio a pr�pria reitora em exerc�cio reconhece que, ap�s a avalia��o participativa em todos os foi firmado em documento oficial pela pr�pria reitora em exerc�cio, deveria ser aberto processo

Floeter, Sergio Ricardo

213

Tide-driven fluid mud transport in the Ems estuary  

NASA Astrophysics Data System (ADS)

The Ems estuary, located at the border between The Netherlands and Germany, experienced a significant change of the hydrodynamic regime during the past decades, as a result of extensive river engineering. With the net sediment transport now being flood-oriented, suspended sediment concentrations have increased dramatically, inducing siltation and formation of fluid mud layers, which, in turn, influence hydraulic flow properties, such as turbulence and the apparent bed roughness. Here, the process-based understanding of fluid mud is essential to model and predict mud accumulation, not only regarding the anthropogenic impact, but also in view of the expected changes of environmental boundary conditions, i.e., sea level rise. In the recent past, substantial progress has been made concerning the understanding of estuarine circulation and influence of tidal asymmetry on upstream sediment accumulation. While associated sediment transport formulations have been implemented in the framework of numerical modelling systems, in-situ data of fluid mud are scarce. This study presents results on tide-driven fluid mud dynamics, measured during four tidal cycles aside the navigation channel in the Ems estuary. Lutoclines, i.e., strong vertical density gradients, were detected by sediment echo sounder (SES). Acoustic Doppler current profiles (ADCP) of different acoustic frequencies were used to determine hydrodynamic parameters and the vertical distribution of suspended sediment concentrations in the upper part of the water column. These continuous profiling measurements were complemented by CTD, ADV, and OBS casts. SES and ADCP profiles show cycles of fluid mud entrainment during accelerating flow, and subsequent settling, and the reformation of a lutocline during decelerating flow and slack water. Significant differences are revealed between flood and ebb phase. Highest entrainment rates are measured at the beginning of the flood phase, associated with strong current shear and rapid vertical mixing, inducing the highest instantaneous suspended sediment flux measured during the tidal cycle. During decelerating flood currents a lutocline is again established at a certain distance above the consolidated river bed. During slack water after the flood phase the concentration gradient increases and the thickness of the fluid mud layer below is constant, also during a significant part of the ebb phase. As water depth decreases during ebb, entrainment occurs only at the upper part of the fluid mud layer. The suspended sediment flux is low compared to the flood phase. These observations are further elaborated using turbulence parameters obtained from ADV and ADCP, explaining the difference between ebb and flood concerning the vertical location of the maximum concentration gradient. This study is funded through DFG-Research Center / Excellence Cluster "The Ocean in the Earth System". The Senckenberg Institute and the Federal Waterways Engineering and Research Institute are acknowledged for technical support.

Becker, Marius; Maushake, Christian; Winter, Christian

2014-05-01

214

V.S. Ramachandran and E.M. Hubbard The Phenomenology of Synaesthesia  

E-print Network

V.S. Ramachandran and E.M. Hubbard The Phenomenology of Synaesthesia Abstract: This article the phenomenology of synaesthesia in greater detail, raise several new questions that have emerged from recent

Ramachandran, Vilayanur S.

215

EM2006K-33 revised Identification of forces shaping the commensal Escherichia coli  

E-print Network

1 EM2006K-33 revised Identification of forces shaping the commensal Escherichia coli genetic title: Commensal Escherichia coli ecological structure Key words: Escherichia coli, commensal, animal forces shaping the Escherichia coli intraspecies ecological structure, we have characterized in terms

216

EM anomalies before the Kozani earthquake: A study of their behavior through laboratory experiments  

NASA Astrophysics Data System (ADS)

Strong electromagnetic (EM) anomalies have been detected, from MHz to kHz, prior to the three destructive earthquakes occurred during 1995-1999 in Greece. The observed sequence of EM anomalies before the Kozani-Grevena earthquake (K-G) of Ms = 6.6 on May 13, 1995 showed some important characteristics: (i) an increasing electromagnetic emission rate; (ii) an emergence of lower kHz frequencies with large amplitudes at the tail of the MHz electromagnetic anomaly; (iii) an electromagnetic quiescence approximately a few hours before the earthquake and (iv) a total absence of EM anomalies during the aftershock period. All these features are compatible with those reported by other authors. This sequence of the field observed EM signals revealed, in terms of emission pattern, similarities to the laboratory acoustic (AE) emissions during different stages of failure preparation process in rocks.

Eftaxias, K.; Kapiris, P.; Dologlou, E.; Kopanas, J.; Bogris, N.; Antonopoulos, G.; Peratzakis, A.; Hadjicontis, V.

2002-04-01

217

Remembering A.S. Kronrod \\Lambda E.M. Landis and I.M. Yaglom  

E-print Network

Remembering A.S. Kronrod \\Lambda E.M. Landis and I.M. Yaglom Translation by Viola Brudno Edited --- even by his appearance --- he was tall and had a beautiful sonorous voice. While still a freshman, A

Laurie, Dirk

218

Degradação de paracetamol empregando tecnologia oxidativa avançada baseada em fotocatálise heterogênea usando irradiação artificial e solar.  

E-print Network

??No presente trabalho avaliou-se a oxidação e a mineralização do paracetamol, baseada em processos oxidativos avançados, via fotocatálise heterogênea. Estudou-se a ação de dois fotocatalisadores:… (more)

Marcela Dias França

2011-01-01

219

Histórico demográfico e filogeografia em populações brasileiras de Ardea alba egretta.  

E-print Network

??Foram estudadas populações de Ardea alba egretta (garça-branca-grande) da família Ardeidae (Aves), amostradas em quatro regiões brasileiras, com latitudes diferentes (Rio Grande do Sul, Pantanal,… (more)

Thaís Camilo Corrêa

2009-01-01

220

Mars' Magnetic Atmosphere: Ionospheric Currents, Lightning (or not), E&M; Subsurface Sounding, and Future Missions  

NASA Astrophysics Data System (ADS)

Mars' ionosphere has no obvious magnetic signs of large-scale, dust-produced lightning. However, there are numerous interesting ionospheric currents (some associated with crustal magnetic fields) which would allow for E&M; subsurface sounding.

Espley, J. R.; Connerney, J. E. P.

2014-07-01

221

Helicopter-borne measurements of sea ice thickness, using a small and lightweight, digital EM system  

Microsoft Academic Search

Sea ice is an important climate variable and is also an obstacle for marine operations in polar regions. We have developed a small and lightweight, digitally operated frequency-domain electromagnetic-induction (EM) system, a so-called EM bird, dedicated for measurements of sea ice thickness. It is 3.5 m long and weighs only 105 kg, and can therefore easily be shipped to remote places and

Christian Haas; John Lobach; Stefan Hendricks; Lasse Rabenstein; Andreas Pfaffling

2009-01-01

222

Colquio em homenagem ao centenrio da morte de Henri Poincar Rio de Janeiro  

E-print Network

Colóquio em homenagem ao centenário da morte de Henri Poincaré Rio de Janeiro 27 a 30 de novembro Henri Poincaré (Université Nancy 2) Em 2012, ocorrerá o primeiro centenário da morte do matemático morte de Poincaré, além de ser uma merecida homenagem a um cientista-filósofo, cujas idéias ainda hoje

Solodov, Mikhail V.

223

The Soils and Groundwater – EM-20 S&T Roadmap Quality Assurance Project Plan  

SciTech Connect

The Soils and Groundwater – EM-20 Science and Technology Roadmap Project is a U.S. Department of Energy, Office of Environmental Management-funded initiative designed to develop new methods, strategies and technology for characterizing, modeling, remediating, and monitoring soils and groundwater contaminated with metals, radionuclides, and chlorinated organics. This Quality Assurance Project Plan provides the quality assurance requirements and processes that will be followed by EM-20 Roadmap Project staff.

Fix, N. J.

2008-02-11

224

ANLISE DE SUPERFCIES BOMBARDEADAS POR FEIXES DE ELTRONS AUTOFOCALIZADOS EM UM SISTEMA DE PLAMA  

E-print Network

ANÁLISE DE SUPERFÍCIES BOMBARDEADAS POR FEIXES DE EL�TRONS AUTOFOCALIZADOS EM UM SISTEMA DE PLAMA um considerável aumento de dureza e redução de desgaste no material sem afetar suas propriedades feixes de elétrons deslocando-se em um tubo contento um gás de baixa densidade. A colisão de elétrons com

225

(continuao das responsabilidades) um estudo em que voc talvez se inscreva, possvel  

E-print Network

(continuação das responsabilidades) um estudo em que você talvez se inscreva, é possível também que tenha que assumir um conjunto geral de responsabilidades pertinentes a todos os participantes da com informação. Caso tenha alguma dúvida a respeito de seus direitos como voluntário em um estudo de

Oliver, Douglas L.

226

The use of EM-CCDs on high resolution soft x-ray spectrometers  

Microsoft Academic Search

Charge-Coupled Devices (CCDs) have been traditionally used on high resolution soft X-ray spectrometers, but with their ability to increase the signal level in the detector before the readout noise of the system is added, Electron-Multiplying CCDs (EM-CCDs) have the potential to offer many advantages in soft X-ray detection. Through this signal multiplication an EM-CCD has advantages over conventioanl CCDs of

James H. Tutt; Andrew D. Holland; Neil J. Murray; Richard D. Harriss; David J. Hall; Matt Soman; Randall L. McEntaffer; James Endicott

2011-01-01

227

Fast, simultaneous and robust VLF-EM data denoising and reconstruction via multivariate empirical mode decomposition  

NASA Astrophysics Data System (ADS)

The measurement of Very Low Frequency Electromagnetic (VLF-EM) is important in many different applications, i.e, environmental, archeological, geotechnical studies, etc. In recent years, improving and enhancing VLF-EM data containing complex numbers (bivariate) was presented by several authors in order to produce reliable models, generally using univariate empirical mode decomposition (EMD). Applying univariate EMD separately on each data is problematic. This results in a different number of misaligned Intrinsic Mode Functions (IMFs) which can complicate the selection of some IMFs for denoising process. Thus, a filtering method based on the multivariate empirical mode decomposition (MEMD) approach to decompose simultaneously bivariate data is proposed. In this paper we address two issues by employing the recently introduced noise assisted MEMD (N-A MEMD) for improving bivariate VLF-EM data. Firstly, the N-A MEMD to decompose bivariate measurement of the VLF-EM data into IMFs and a residue is defined as VLF-EM signal or unwanted noise. Secondly, the proposed method is used to enhance VLF-EM data and to reject unwanted noise. Finally, the proposed method is applied to a synthetic data with two added sinusoids. To demonstrate the robustness of the N-A MEMD method, the method was tested on added-noise synthetic data sets and the results were compared to the Ensemble EMD (EEMD) and Bivariate EMD (BEMD). The N-A MEMD gave more robust and accurate results than the EEMD and BEMD methods and the method required less CPU time to obtain the IMFs compared to EEMD. The method was also tested on several field data sets. The results indicate that the filtered VLF-EM data based on the N-A MEMD make the data easier to interpret and to be analyzed further. In addition, the 2D resistivity profile estimated from the inversion of filtered VLF-EM data results was appropriate to the geological condition.

Sungkono; Bahri, Ayi S.; Warnana, Dwa D.; Monteiro Santos, Fernando A.; Santosa, Bagus J.

2014-06-01

228

Self-assembled monolayers improve protein distribution on holey carbon cryo-EM supports  

PubMed Central

Poor partitioning of macromolecules into the holes of holey carbon support grids frequently limits structural determination by single particle cryo-electron microscopy (cryo-EM). Here, we present a method to deposit, on gold-coated carbon grids, a self-assembled monolayer whose surface properties can be controlled by chemical modification. We demonstrate the utility of this approach to drive partitioning of ionotropic glutamate receptors into the holes, thereby enabling 3D structural analysis using cryo-EM methods. PMID:25403871

Meyerson, Joel R.; Rao, Prashant; Kumar, Janesh; Chittori, Sagar; Banerjee, Soojay; Pierson, Jason; Mayer, Mark L.; Subramaniam, Sriram

2014-01-01

229

Pre-flight risk assessment in emergency medical service (EMS) helicopters  

NASA Technical Reports Server (NTRS)

A preflight risk assessment system (SAFE) was developed at NASA-Ames Research Center for civil EMS operations to assist pilots in making a decision objectively to accept or decline a mission. The ability of the SAFE system to predict risk profiles was examined at an EMS operator. Results of this field study showed that the usefulness of SAFE was largely dependent on the type of mission flown.

Shively, Robert J.

1990-01-01

230

Using EM to Obtain Asymptotic Variance-Covariance Matrices: The SEM Algorithm  

Microsoft Academic Search

The expectation maximization (EM) algorithm is a popular, and often remarkably simple, method for maximum likelihood estimation in incomplete-data problems. One criticism of EM in practice is that asymptotic variance–covariance matrices for parameters (e.g., standard errors) are not automatic byproducts, as they are when using some other methods, such as Newton–Raphson. In this article we define and illustrate a procedure

Xiao-Li Meng; Donald B. Rubin

1991-01-01

231

Application of Fuzzy Logic to EMS-type Magnetically Levitated Railway Vehicle  

Microsoft Academic Search

A type of the magnetically levitated railway system with the electro-magnetic suspension system (EMS), which is named HSST system, will be put into revenue service as an urban transport in Nagoya, Japan at the beginning of April 2005. To extend its operational velocity higher than 200km\\/h for applications in other cities, the design of its EMS system is reexamined for

Shinichi Kusagawa; Jumpei Baba; Katsuhiko Shutoh; Eisuke Masada

2004-01-01

232

0.5setgray00.5setgray1 Determinao de coeficientes em equaes  

E-print Network

; · Resson^ancia Magn´etica ­ MRI. ­ p. 12/6 #12;Técnicas para Geração de Imagens em Medicina Nuclear · Single Photon Emission Tomography ­ SPECT, · Positron Emission Tomograpy ­ PET; · Medicina Nuclear´ogicas, microscopia, entre outros. ­ p. 10/6 #12;T´ecnicas para Gerac¸~ao de Imagens em Medicina ­ p. 11/6 #12

Cipolatti, Rolci

233

Apresentase neste apndice a definio de categoria cartesiana livremente gerada, apresentada em [Sernadas et al 92e]. Tal como em [Admek et al 90], assumese que  

E-print Network

'')�Mor C P desde que (s:c®c')�Mor C P e (s':c'®c'')�Mor C P ; . ((s':c®c')�(s'':c®c''):c®c'�c'')�Mor C P desde que (s':c®c')�Mor C P e (s'':c®c'')� Mor C P ; pela relação de equivalência induzida pelas, apresentada em [Sernadas et al 92e]. Tal como em [Adámek et al 90], assume­se que Cat denota a categoria de

Lisboa, Universidade Técnica de

234

EM modeling for GPIR using 3D FDTD modeling codes  

SciTech Connect

An analysis of the one-, two-, and three-dimensional electrical characteristics of structural cement and concrete is presented. This work connects experimental efforts in characterizing cement and concrete in the frequency and time domains with the Finite Difference Time Domain (FDTD) modeling efforts of these substances. These efforts include Electromagnetic (EM) modeling of simple lossless homogeneous materials with aggregate and targets and the modeling dispersive and lossy materials with aggregate and complex target geometries for Ground Penetrating Imaging Radar (GPIR). Two- and three-dimensional FDTD codes (developed at LLNL) where used for the modeling efforts. Purpose of the experimental and modeling efforts is to gain knowledge about the electrical properties of concrete typically used in the construction industry for bridges and other load bearing structures. The goal is to optimize the performance of a high-sample-rate impulse radar and data acquisition system and to design an antenna system to match the characteristics of this material. Results show agreement to within 2 dB of the amplitudes of the experimental and modeled data while the frequency peaks correlate to within 10% the differences being due to the unknown exact nature of the aggregate placement.

Nelson, S.D.

1994-10-01

235

The tidal asymmetries and residual flows in Ems Estuary  

NASA Astrophysics Data System (ADS)

A 3D unstructured-grid numerical model of the Ems Estuary is presented. The simulated hydrodynamics are compared against tidal gauge data and observations from research cruises. A comparison with an idealized test reveals the capability of the model to reproduce the secondary circulation patterns known from theoretical results. The simulations prove to be accurate and realistic, confirming and extending findings from earlier observations and modeling studies. The basic characteristics of dominant physical processes in the estuary such as tidal amplification, tidal damping, overtide generation, baroclinicity and internal mixing asymmetry are quantified. The model demonstrates an overall dominance of the flood currents in most of the studied area. However, the hypsometric control in the vicinity of Dollart Bay reverses this asymmetry, with the ebb currents stronger than the flood ones. Small-scale bathymetric characteristics and baroclinicity result in a very complex interplay between dominant physical mechanisms in different parts of the tidal channels and over the tidal flats. Residual flow reveals a clear overturning circulation in some parts of the estuary which is related to a mixing asymmetry between flood and ebb currents. We demonstrate that while areas close to the tidal river exhibit overall similarity with density controlled estuarine conditions, in large areas of the outer estuary barotropic forcing and complex bathymetry together with the density distribution affect substantially the horizontal circulation.

Pein, Johannes Ulrich; Stanev, Emil Vassilev; Zhang, Yinglong Joseph

2014-10-01

236

If EM waves don't interfere, what causes interferograms?  

NASA Astrophysics Data System (ADS)

Photonics engineers involved in designing and operating Fourier transform spectrometers (FTS) often rely on Maxwell's wave equations and time-frequency (distance-wavenumber) Fourier theory as models to understand and predict the conversion of optical energy to electrical signals in their instruments. Dr. Chandrasekhar Roychoudhuri and his colleagues, at last year's conference, presented three significant concepts that might completely change the way we comprehend the interaction of light and matter and the way interference information is generated. The first concept is his non-interaction of waves (NIW) formulation, which puts in place an optical wave description that more accurately describe the properties of the finite time and spatial signals of an optical system. The second is a new description for the cosmic EM environment that recognizes that space is really filled with the ether of classical electromagnetics. The third concept is a new metaphysics or metaphotonics that compares the photon as a particle in a void against the photon as a wave in a medium to see which best explain the twelve different aspects of light. Dr. Henry Lindner presents a compelling case that photons are waves in a medium and particles (electrons, protons, atoms) are wave-structures embedded in the new ether. Discussion of the three new principles is intended to increase the curiosity of photonics engineers to investigate these changes in the nature of light and matter.

Wellard, Stanley J.

2012-10-01

237

Reservoir characterization and process monitoring with EM methods. 1994 Annual report  

SciTech Connect

During the past five years at Lawrence Livermore National Laboratory (LLNL) the authors have applied the EM induction method to the problem of petroleum reservoir characterization and enhanced oil recovery (EOR) monitoring. The goal is to develop practical tools for determining the electrical resistivity distribution between boreholes at a useful scale for reservoir characterization. During FY94 the authors conducted their largest field test to date. They applied crosshole and surface-to-borehole EM techniques to reservoir characterization at the Los Hills No. 3 oil field making three sets of measurements during the initial phase of the steam drive.From these data they were able to determine the resistivity and configuration of the oil sands, between the observation wells, and provide an image of the subsurface resistivity changes due to the steam drive. They also conducted a waterflood experiment at the Richmond Field Station facility using the borehole-to-surface EM technique. For this test they injected a small quantity of saltwater, and applied the Em technique to monitor the progress of the injected plume. Data collection for this experiment is complete but the results are yet to be interpreted. Finally, a project to understand EM propagation through steel casing was initiated in 1994. The goals of the experiment are to determine the limits and applications for crosswell EM surveys through steel well casing.

Wilt, M.

1995-05-01

238

Anisotropic 3D inversion of towed streamer EM data from the Troll West oil province (Invited)  

NASA Astrophysics Data System (ADS)

Obviating the need for ocean bottom receivers, the towed streamer EM system enables CSEM data to be acquired simultaneously with seismic over very large areas in frontier and mature basins for higher production rates and more cost effective than conventional marine CSEM. The towed streamer EM data are currently processed and delivered as a spectrum of frequency-domain responses. We apply a 3D anisotropic inversion methodology for towed streamer EM data that includes a moving sensitivity domain. Our implementation is based on the 3D contraction integral equation method for computing the EM responses and Fréchet derivatives, and uses the re-weighted regularized conjugate gradient method for minimizing the objective functional with focusing regularization. We present an actual case study for the 3D anisotropic inversion of towed streamer EM data from the Troll West oil province in the North Sea, and demonstrate our ability to image the Troll West Oil and Gas Provinces. We conclude that 3D anisotropic inversion of the data from the current generation of towed streamer EM system can adequately recover both the vertical and horizontal resistivities in anisotropic hydrocarbon-bearing formations.

Mattsson, J.; Midgley, J.; Zhdanov, M. S.; ENDO, M.

2013-12-01

239

Visualizing Proteins and Macromolecular Complexes by Negative Stain EM: from Grid Preparation to Image Acquisition  

PubMed Central

Single particle electron microscopy (EM), of both negative stained or frozen hydrated biological samples, has become a versatile tool in structural biology 1. In recent years, this method has achieved great success in studying structures of proteins and macromolecular complexes 2, 3. Compared with electron cryomicroscopy (cryoEM), in which frozen hydrated protein samples are embedded in a thin layer of vitreous ice 4, negative staining is a simpler sample preparation method in which protein samples are embedded in a thin layer of dried heavy metal salt to increase specimen contrast 5. The enhanced contrast of negative stain EM allows examination of relatively small biological samples. In addition to determining three-dimensional (3D) structure of purified proteins or protein complexes 6, this method can be used for much broader purposes. For example, negative stain EM can be easily used to visualize purified protein samples, obtaining information such as homogeneity/heterogeneity of the sample, formation of protein complexes or large assemblies, or simply to evaluate the quality of a protein preparation. In this video article, we present a complete protocol for using an EM to observe negatively stained protein sample, from preparing carbon coated grids for negative stain EM to acquiring images of negatively stained sample in an electron microscope operated at 120kV accelerating voltage. These protocols have been used in our laboratory routinely and can be easily followed by novice users. PMID:22215030

Booth, David S.; Avila-Sakar, Agustin; Cheng, Yifan

2011-01-01

240

High-speed computation of the EM algorithm for PET image reconstruction  

SciTech Connect

The PET image reconstruction based on the EM algorithm has several attractive advantages over the conventional convolution backprojection algorithms. However, two major drawbacks have impeded the routine use of the EM algorithm, namely, the long computational time due to slow convergence and the large memory required for the storage of the image, projection data and the probability matrix. In this study, the authors attempts to solve these two problems by parallelizing the EM algorithm on a multiprocessor system. The authors have implemented an extended hypercube (EH) architecture for the high-speed computation of the EM algorithm using the commercially available fast floating point digital signal processor (DSP) chips as the processing elements (PEs). The authors discuss and compare the performance of the EM algorithm on a 386/387 machine, CD 4360 mainframe, and on the EH system. The results show that the computational speed performance of an EH using DSP chips as PEs executing the EM image reconstruction algorithm is about 130 times better than that of the CD 4360 mainframe. The EH topology is expandable with more number of PEs.

Rajan, K.; Patnaik, L.M.; Ramakrishna, J. (Indian Inst. of Science, Bangalore (India))

1994-10-01

241

14-3-3 proteins are part of an abscisic acid-VIVIPAROUS1 (VP1) response complex in the Em promoter and interact with VP1 and EmBP1.  

PubMed Central

Protein-DNA complexes were formed when nuclear extracts from embryogenic rice suspension cultures or maize embryos were incubated with an abscisic acid-VIVIPAROUS1 (VP1) response element (Em1a) from the Em promoter. Monoclonal antibodies generated to GF14, a 14-3-3 protein from plants, resulted in gel retardation of the Em1a-protein complexes. Antibodies generated to the C and N termini of GF14 detected protein isoforms in rice nuclear and cytoplasmic extracts, but no differences in distribution of the GF14 isoforms were recognized between the nucleus and cytoplasm or when abscisic acid-treated and untreated tissues were compared. When recombinant GF14 fusion proteins from rice were added to nuclear extracts, novel complexes were formed that required the dimerization domain of GF14. Chemical cross-linking showed that GF-14 interacted with the basic leucine zipper factor EmBP1, which binds specifically to Em1a, and with VP1, which transactivates Em through Em1a. GF14 proteins from rice were shown to interact with VP1 in yeast through the dimerization domain of GF14. Our results indicated that GF14 interacts with both site-specific DNA binding proteins (i.e., EmBP1) and tissue-specific regulatory factors (i.e., VP1) and may provide a structural link between VP1 and the Em1a transcriptional complex. PMID:9596641

Schultz, T F; Medina, J; Hill, A; Quatrano, R S

1998-01-01

242

Elimination of error factors, affecting EM and seismic inversions  

NASA Astrophysics Data System (ADS)

EM or seismic data inversions are affected by many factors, which may conceal the responses from target objects. We address here the contributions from the following effects: 1) Pre-survey spectral sensitivity factor. Preliminary information about a target layer can be used for a pre-survey estimation of the required frequency domain and signal level. A universal approach allows making such estimations in real time, helping the survey crew to optimize an acquisition process. 2) Preliminary velocities' identification and their dispersions for all the seismic waves, arising in a stratified media became a fast working tool, based on the exact analytical solution. 3) Vertical gradients effect. For most layers the log data scatter, requiring an averaging pattern. A linear gradient within each representative layer is a reasonable compromise between required inversion accuracy and forward modeling complexity. 4) An effect from the seismic source's radial component becomes comparable with vertical part for explosive sources. If this effect is not taken into account, a serious modeling error takes place. This problem has an algorithmic solution. 5) Seismic modeling is often based on different representations for a source formulated either for a force or to a potential. The wave amplitudes depend on the formulation, making an inversion result sensitive to it. 6) Asymmetrical seismic waves (modified Rayleigh) in symmetrical geometry around liquid fracture come from S-wave and merge with the modified Krauklis wave at high frequencies. A detail analysis of this feature allows a spectral range optimization for the proper wave's extraction. 7) An ultrasonic experiment was conducted to show different waves appearance for a super-thin water-saturated fracture between two Plexiglas plates, being confirmed by comparison with theoretical computations. 8) A 'sandwich effect' was detected by comparison with averaged layer's effect. This opens an opportunity of the shale gas direct identification from the surface measurements.

Magomedov, M.; Zuev, M. A.; Korneev, V. A.; Goloshubin, G.; Zuev, J.; Brovman, Y.

2013-12-01

243

Does contamination buildup limit throughput for automated cryoEM?  

PubMed

The development of automated systems for data acquisition in cryo electron microscopy has enabled the possibility of acquiring very large number of images from a single specimen grid. We have demonstrated that over images of 250,000 single particles can be acquired in a 24 h period. This has raised questions as to whether contamination buildup on the specimen limits the quality of the data that can be acquired during these long duration experiments and also whether the data acquisition session could be extended to allow acquisition of more than 1,000,000 particles. We report here a systematic characterization of contamination of specimens maintained for long periods of time at liquid nitrogen temperatures using standard side entry cryo stages. As part of this characterization we developed a more reliable method for accurately estimating specimen ice thickness. Using the method, we were able to calibrate image contrast against ice thickness under a variety of magnifications, objective aperture positions, and defoci, and demonstrated the strong dependence of the calibration curve on these parameters. The results show the anti-contamination aperture is, as expected, critical to the prevention of contamination and that loading film into the microscope dramatically increases the contamination rate, particularly in the first 3 h after the insertion of the film box. In the absence of film, we were able to reproducibly demonstrate that the contamination rate can be limited to a rate of approximately 1 angstrom/h providing reassurance that contamination will not be a major limiting factor for long term cryoEM experiments if a CCD camera is used for the imaging. PMID:16632377

Cheng, Anchi; Fellmann, Denis; Pulokas, James; Potter, Clinton S; Carragher, Bridget

2006-06-01

244

EM-54 Technology Development In Situ Remediation Integrated Program. Annual report  

SciTech Connect

The Department of Energy (DOE) established the Office of Technology Development (EM-50) as an element of Environmental Restoration and Waste Management (EM) in November 1989. EM manages remediation of all DOE sites as well as wastes from current operations. The goal of the EM program is to minimize risks to human health, safety and the environment, and to bring all DOE sites into compliance with Federal, state, and local regulations by 2019. EM-50 is charged with developing new technologies that are safer, more effective and less expensive than current methods. The In Situ Remediation Integrated Program (the subject of this report) is part of EM-541, the Environmental Restoration Research and Development Division of EM-54. The In Situ Remediation Integrated Program (ISR IP) was instituted out of recognition that in situ remediation could fulfill three important criteria: Significant cost reduction of cleanup by eliminating or minimizing excavation, transportation, and disposal of wastes; reduced health impacts on workers and the public by minimizing exposure to wastes during excavation and processing; and remediation of inaccessible sites, including: deep subsurfaces; in, under, and around buildings. Buried waste, contaminated soils and groundwater, and containerized wastes are all candidates for in situ remediation. Contaminants include radioactive wastes, volatile and non-volatile organics, heavy metals, nitrates, and explosive materials. The ISR IP tends to facilitate development of in situ remediation technologies for hazardous, radioactive, and mixed wastes in soils, groundwater, and storage tanks. Near-term focus is on containment of the wastes, with treatment receiving greater effort in future years.

Not Available

1993-08-01

245

Noninvasive monitoring of CO2 sequestration sites using airborne EM technology  

NASA Astrophysics Data System (ADS)

Usage of conventional airborne EM methods for studies related to CO2 sequestration reservoirs have been restricted up to date due to depth and system noise limitations. Recently a family of new EM systems was developed and launched in Canada, allowing superior depth of investigation to that of the conventional EM systems. Depending on the resistivity of the area such systems are capable of recording response from targets emplaced at the depths of up to 2 kilometers below surface. These systems are powered by natural (telluric and storm lightning) EM fields and are particularly sensitive to contrast in electrical properties of the subsurface, rather than absolute values of the conductivities, which make these systems suitable for usage in both resistive and conductive environments, including the subsurface identification and mapping of gas, hydrocarbons, liquid CO2 and supercritical CO2. Based on the well log data collected at one of the proposed sequestration sites, forward modeling has been carried out in order to study which changes in electrical properties of reservoir rocks before and after the introduction of CO2 to the sequestration reservoir are sufficient to provide enough contrast so they become detectable by EM systems. The results of the modeling showed that under favourable conditions it is possible to differentiate between brine-filled reservoirs versus CO2-filled reservoir at a depth of more than 1 kilometer with the main controlling parameters being reservoir effective porosity, thickness, Total Dissolved Solids (TDS) content of the pore-filling fluid and CO2 saturation after the injection. EM surveying can play a crucial role in studies of moderately deep-seated reservoirs, specifically can assist in monitoring CO2 injection and migration and can provide some additional data regarding the CO2 saturation level. The benefits of application of these new EM systems compared with 3D reflection seismic, VSP, gravity, and other geophysical methods will also be discussed.

Kaminski, V.; Harbert, W. P.; Legault, J. M.

2009-12-01

246

Intra- and extracellular regulation of activity and processing of legumain by cystatin E/M.  

PubMed

Legumain, an asparaginyl endopeptidase, is up-regulated in tumour and tumour-associated cells, and is linked to the processing of cathepsin B, L, and proMMP-2. Although legumain is mainly localized to the endosomal/lysosomal compartments, legumain has been reported to be localized extracellularly in the tumour microenvironment and associated with extracellular matrix and cell surfaces. The most potent endogenous inhibitor of legumain is cystatin E/M, which is a secreted protein synthesised with an export signal. Therefore, we investigated the cellular interplay between legumain and cystatin E/M. As a cell model, HEK293 cells were transfected with legumain cDNA, cystatin E/M cDNA, or both, and over-expressing monoclonal cell lines were selected (termed M38L, M4C, and M3CL, respectively). Secretion of prolegumain from M38L cells was inhibited by treatment with brefeldin A, whereas bafilomycin A1 enhanced the secretion. Cellular processing of prolegumain to the 46 and 36 kDa enzymatically active forms was reduced by treatment with either substance alone. M38L cells showed increased, but M4C cells decreased, cathepsin L processing suggesting a crucial involvement of legumain activity. Furthermore, we observed internalization of cystatin E/M and subsequently decreased intracellular legumain activity. Also, prolegumain was shown to internalize followed by increased intracellular legumain processing and activation. In addition, in M4C cells incomplete processing of the internalized prolegumain was observed, as well as nuclear localized cystatin E/M. Furthermore, auto-activation of secreted prolegumain was inhibited by cystatin E/M, which for the first time shows a regulatory role of cystatin E/M in controlling both intra- and extracellular legumain activity. PMID:22902879

Smith, Robert; Johansen, Harald T; Nilsen, Hilde; Haugen, Mads H; Pettersen, Solveig J; Mælandsmo, Gunhild M; Abrahamson, Magnus; Solberg, Rigmor

2012-12-01

247

Programa de Ps-Graduao em Literatura, Cultura e Contemporaneidade Rua Marqus de So Vicente, 225 -Gvea -22453-900  

E-print Network

de Pós-Graduação em Literatura, Cultura e Contemporaneidade Rua Marquês de São Vicente, 225 - Gávea@puc-rio.br - www.letras.puc-rio.br PROGRAMA DE P�S-GRADUA��O EM LITERATURA, CULTURA E CONTEMPORANEIDADE EDITAL;__________________________________________________________________________________________________ Programa de Pós-Graduação em Literatura, Cultura e Contemporaneidade Rua Marquês de São Vicente, 225

248

Prevalência de adoção intra e extrafamiliar em amostras clínica e não-clínica de crianças e adolescentes Prevalence of intrafamilial and extrafamilial adoption in a clinical and non-clinical setting samples of children and adolescents  

Microsoft Academic Search

Introdução\\/Objetivos: Estudos realizados em diferentes países demonstram que a proporção de crianças e ado- lescentes adotivos atendidos em clínicas psiquiátricas é maior em relação à verificada nas demais clínicas e na população em geral. O objetivo deste estudo é verificar a prevalência de adoção em amostra clínica e não-clínica, identificando possíveis associações entre tipos de adoção (extrafamiliar e intrafamiliar) e

Lee Fu I; Eneida B Matarazzo

249

Immunohistochemical distribution of the secretogranin II-derived peptide EM66 in the rat hypothalamus: a comparative study with jerboa.  

PubMed

EM66 is a 66-amino acid peptide derived from secretogranin II, a member of granin acidic secretory protein family, by proteolytic processing. EM66 has been previously characterized in the jerboa (Jaculus orientalis) hypothalamus and its potential implication in the neuroendocrine regulation of feeding behaviour has been demonstrated. In the present study, an immunohistochemical analysis of the localization of EM66 within hypothalamic structures of rat was performed and compared to the distribution of EM66 in the jerboa hypothalamus. In the rat hypothalamus, as in the jerboa, EM66 immunostaining was detected in the parvocellular paraventricular, preoptic and arcuate nuclei, as well as the lateral hypothalamus which displayed an important density of EM66-producing neurones. However, unlike jerboa, the suprachiasmatic and supraoptic nuclei of the rat hypothalamus were devoid of cellular EM66-immunolabeling. Thus, the novel peptide EM66 may exert common neuroendocrine activities in rat and jerboa, e.g. control of food intake, and species-specific roles in jerboa such as the regulation of biological rhythms and hydromineral homeostasis. These results suggest the existence of differences between jerboas and rats in neuroendocrine regulatory mechanisms involving EM66. PMID:17240057

Boutahricht, Mohammed; Guillemot, Johann; Montero-Hadjadje, Maité; Barakat, Youssef; El Ouezzani, Seloua; Alaoui, Abdelilah; Yon, Laurent; Vaudry, Hubert; Anouar, Youssef; Magoul, Rabia

2007-03-13

250

EFICÁCIA DE TRÊS MEDICAMENTOS NO CONTROLE DA INFECÇÃO EXPERIMENTAL POR TRYPANOSOMA EVANSI EM RATOS (RATTUS NORVEGICUS) LINHAGEM WISTAR.  

E-print Network

??Este trabalho objetivou verificar os achados laboratoriais e histológicos da infecção experimental por Trypanosoma (Trypanozoon) evansi (Steel, 1885) Balbiani, 1888, em ratos (Rattus norvegicus) da… (more)

Rovaina Laureano Doyle

2006-01-01

251

Padronização de testes neurocomportamentais para investigação da importância funcional do wulst visual em corujas buraqueiras (Athene cunicularia).  

E-print Network

??As aves têm sido utilizadas em numerosos estudos envolvendo habilidades visuo-cognitivas, constituindo um excelente modelo para a neurolobiologia comparativa. Vários estudos já demonstraram que na… (more)

Leticia Mercedes Gomes Correia Martins

2012-01-01

252

Pre-flight risk assessment in Emergency Medical Service (EMS) helicopters  

NASA Technical Reports Server (NTRS)

The Emergency Medical Service (EMS) industry has been the subject of several television and newspaper articles (Harvey and Jensen, 1987) which emphasized the negative aspects, (e.g., fatalities and high accident rates), rather than the life saving services performed. Until recently, the accident rate of the EMS industry has been five times as high as that of other civil helicopters. This high accident rate has been coupled with the dramatic rise in the number of programs. The industry has built from a single service at its inception in 1972, to over 180 in 1987 (Spray, 1987), to the point that 93 percent of the contiguous U.S. is now covered by some type of EMS service. These factors prompted the National Transportation Safety Board (NTSB) to study the accidents that occurred between May 11, 1978 and December 3, 1986 (NTSB, 1988). The NTSB report concluded that 'Sound pilot judgment is central to safe flight operations.' They further stated that '... factors unique to EMS helicopter operations--such as the influence of the mission itself, program competition, and EMS program management perspectives--can drastically influence pilot judgment during the EMS mission.' One of the most difficult decisions that a pilot must make is whether to accept or decline a mission. A pre-flight risk assessment system (SAFE) was developed at NASA-Ames Research Center for civil EMS operations to aid pilots in making this decision objectively. The ability of the SAFE system to predict mission risk profiles was tested at an EMS facility. The results of this field study demonstrated that the usefulness of SAFE was highly dependent on the type of mission flown. SAFE is now being modified so that it can 'learn' with each mission flown. For example, after flying a mission to a particular site, an EMS pilot would input information about this mission into the system, such as new buildings, wires, or approach procedures. Then, the next time a pilot flew a similar mission or one to the same area, this additional information would be taken into account in computing a risk assessment.

Shively, R. J.

1992-01-01

253

Scalable and Interactive Segmentation and Visualization of Neural Processes in EM Datasets  

PubMed Central

Recent advances in scanning technology provide high resolution EM (Electron Microscopy) datasets that allow neuroscientists to reconstruct complex neural connections in a nervous system. However, due to the enormous size and complexity of the resulting data, segmentation and visualization of neural processes in EM data is usually a difficult and very time-consuming task. In this paper, we present NeuroTrace, a novel EM volume segmentation and visualization system that consists of two parts: a semi-automatic multiphase level set segmentation with 3D tracking for reconstruction of neural processes, and a specialized volume rendering approach for visualization of EM volumes. It employs view-dependent on-demand filtering and evaluation of a local histogram edge metric, as well as on-the-fly interpolation and ray-casting of implicit surfaces for segmented neural structures. Both methods are implemented on the GPU for interactive performance. NeuroTrace is designed to be scalable to large datasets and data-parallel hardware architectures. A comparison of NeuroTrace with a commonly used manual EM segmentation tool shows that our interactive workflow is faster and easier to use for the reconstruction of complex neural processes. PMID:19834227

Jeong, Won-Ki; Beyer, Johanna; Hadwiger, Markus; Vazquez, Amelio; Pfister, Hanspeter; Whitaker, Ross T.

2011-01-01

254

Código para imageamento indireto de estrelas em sistemas binarios: simulação de variações elipsoidais e do perfil das linhas  

NASA Astrophysics Data System (ADS)

As estrelas secundárias em variáveis cataclí smicas (VCs) e binárias-x de baixa massa (BXBMs) são cruciais para o entendimento da origem, evolução e comportamento destas binárias interagentes. Elas são estrelas magneticamente ativas submetidas a condições ambientais extremas [e.g., estão muito próximas de uma fonte quente e irradiante; têm rotação extremamente rápida e forma distorcida; estão perdendo massa a taxas de 10-8-10-10 M¤/ano] que contribuem para que suas propriedades sejam distintas das de estrelas de mesma massa na seqüência principal. Por outro lado, o padrão de irradiação na face da secundária fornece informação sobre a geometria das estruturas de acréscimo em torno da estrela primária. Assim, a obtenção de imagens da superfície destas estrelas é de grande interesse astrofísico. A Tomografia Roche usa as variações no perfil das linhas de emissão/absorção da estrela secundária em função da fase orbital para mapear a distribuição de brilho em sua superfície. Neste trabalho apresentamos os resultados iniciais do desenvolvimento de um programa para o mapeamento da distribuição de brilho na superfí cie das estrelas secundárias em VCs e BXBMs com técnicas de astro-tomografia. Presentemente temos em operação um código que simula as variações no perfil das linhas em conseqüência de efeito Doppler resultante da combinação de rotação e translação de uma estrela em forma de lobo de Roche em torno do centro de massa da binária, em função da distribuição de brilho na superfície desta estrela. O código igualmente produz a curva de luz resultante das variações de aspecto da estrela em função da fase orbital (variações elipsoidais).

Souza, T. R.; Baptista, R.

2003-08-01

255

Evaluation model calculations with the water reactor analysis package (WRAP-EM)  

SciTech Connect

The Water Reactor Analysis Package-Evaluation Model (WRAP-EM) is a modular system of computer codes designed to provide the safety analyst with the capability of performing complete loss-of-coolant calculations for both pressurized- and boiling-water reactor systems. The system provides a licensing-type calculation capability and thus contains most of the Nuclear Regulatory Commission-Approved EM options, as described in the Code of Federal Regulations, Title 10, Part 50, Appendix K. All phases of an accident (blowdown, refill, and reflood) are modeled. The WRAP consists of modified versions of five preexisting codes (RELAP4/MOD5, GAPCON, FRAP, MOXY, and NORCOOL), the necessary interfaces to permit automatic transition from one code to the next during the transient calculations, plus a host of user-convenience features to aid the analyst faced with a multitude of EM calculations. The WRAP has been verified against both calculated and experimental results.

Gregory, M.V.; Beranek, F.

1982-01-01

256

An Ems-Sensitivity Factor in Maize Conditioning Albino Leaf Stripes  

PubMed Central

A description is given for a recessive EMS-sensitivity factor conditioning albino leaf stripes. In the homozygous condition, there is low frequency of spontaneous leaf stripes. EMS, depending on the concentration, increases markedly the frequency of the stripes in 100% of the treated plants. The effects of EMS, given to the seeds, starts to appear from the 6th to 7th leaf and persists in all the leaves throughout the life cycle of the M1 plants. Only about 20–25% of the M2 plants showed some variegation. These variegated M2 plants were not distributed at random among the different ear-to-row M2 rows. PMID:17248674

Efron, Y.

1974-01-01

257

Fabs enable single particle cryoEM studies of small proteins  

PubMed Central

Summary In spite of its recent achievements, the technique of single particle electron cryomicroscopy (cryoEM) has not been widely used to study proteins smaller than 100kDa, although it is a highly desirable application of this technique. One fundamental limitation is that images of small proteins embedded in vitreous ice do not contain adequate features for accurate image alignment. We describe a general strategy to overcome this limitation by selecting a fragment antigen binding (Fab) to form a stable and rigid complex with a target protein, thus providing a defined feature for accurate image alignment. Using this approach, we determined a three-dimensional structure of a ~65 kDa protein by single particle cryoEM. Because Fabs can be readily generated against a wide range of proteins by phage display, this approach is generally applicable to study many small proteins by single particle cryoEM. PMID:22483106

Wu, Shenping; Avila-Sakar, Agustin; Kim, JungMin; Booth, David S.; Greenberg, Charles H.; Rossi, Andrea; Liao, Maofu; Li, Xueming; Alian, Akram; Griner, Sarah L.; Juge, Narinobu; Yu, Yadong; Mergel, Claudia M.; Chaparro-Riggers, Javier; Strop, Pavel; Tampe, Robert; Edwards, Robert H.; Stroud, Robert M.; Craik, Charles S.; Cheng, Yifan

2012-01-01

258

OsLEA1a, a new Em-like protein of cereal plants.  

PubMed

Proteins abundant in seeds during the late stages of development, late embryogenesis abundant (LEA) proteins, are associated with desiccation tolerance. More than 100 of the group I LEA genes, also termed Em genes, have been identified from plants, bacteria and animals. The wide distribution indicates the functional importance of these genes. In the present study, we characterized a novel Em-like gene, OsLEA1a of rice (Oryza sativa). The encoded OsLEA1a protein has an N-terminal sequence similar to that of other plant Em proteins but lacks a 20-mer motif that is the most significant feature of typical Em proteins. The location of the sole intron indicates that the second exon of OsLEA1a is the mutated product of a typical Em gene. Transcriptome analysis revealed OsLEA1a mainly expressed in embryos, with no or only a few transcripts in osmotic stress-treated vegetative tissues. Structural analysis revealed that the OsLEA1a protein adopts high amounts of disordered conformations in solution and undergoes desiccation-induced conformational changes. Macromolecular interaction studies revealed that OsLEA1a protein interacts with non-reducing sugars and phospholipids but not poly-l-lysine. Thus, although the OsLEA1a protein lost its 20-mer motif, it is still involved in the formation of bioglasses with non-reducing sugars or plasma membrane. However, the protein does not function as a chaperone as do other groups of hydrophilic LEA proteins. The orthologs of the OsLEA1a gene had been identified from various grasses but not in dicot plants. Genetic analysis indicated that rice OsLEA1a locates at a 193 kb segment in chromosome 1 and is conserved in several published cereal genomes. Thus, the ancestor of Em-like genes might have evolved after the divergence of monocot plants. PMID:21097897

Shih, Ming-Der; Huang, Lin-Tzu; Wei, Fu-Jin; Wu, Ming-Tsung; Hoekstra, Folkert A; Hsing, Yue-Ie C

2010-12-01

259

A distribuição de velocidades na linha de visada em galáxias barradas vistas de face  

NASA Astrophysics Data System (ADS)

Com o objetivo de realizar um estudo cinemático da componente vertical de barras em galáxias, obtivemos espectros de fenda longa de alta razão S/N ao longo dos eixos maior e menor de 14 galáxias barradas vistas de face, nos telescópios de 1.52m do ESO em La Silla, Chile, e de 2.3m do Steward Observatory em Kitt Peak, Arizona. Estes dados nos permitiram determinar a distribuição de velocidades das estrelas ao longo do eixo vertical das barras e discos destes sistemas, tanto no centro como em pontos que distam cerca de 5 e 20 segundos de arco do núcleo, correspondendo a distâncias de cerca de 0.7 e 2.8 kpc, respectivamente. Desta forma, a variação radial da distribuição de velocidades também pôde ser avaliada. Este tipo de análise tem raros exemplos na literatura por ser caro em termos de tempo de telescópio. Entretanto, é de fácil justificativa, considerando que traz novas informações que podem ser utilizadas para aperfeiçoar modelos teóricos acerca da formação e evolução de galáxias. Um algoritmo por nós desenvolvido foi utilizado para obter as distribuições de velocidades como Gaussianas generalizadas (polinômios de Gauss-Hermite), o que traz um ingrediente a mais neste tipo de estudo que, tradicionalmente, se utiliza de Gaussianas puras, uma hipótese nem sempre razoável. Apresentaremos os resultados deste trabalho, que incluem um diagnóstico para a identificação de barras recém formadas, e testes para o modelo isotérmico de discos. Mostraremos que: (i) a escolha das estrelas padrão em velocidade, e dos parâmetros da Gaussiana, deve ser muito bem justificada já que tem influência significativa nos resultados; (ii) muitas galáxias apresentam uma depressão na dispersão de velocidades na região central, que pode estar associada a um disco interno; e (iii) a dispersão de velocidades é constante ao longo da barra, nos eixos maior e menor, mas cai substancialmente quando se passa da barra para o disco.

Gadotti, D. A.; de Souza, R. E.

2003-08-01

260

INPE-12145-TDI/969 ANLISE DE EPISDIOS DE TORNADO EM SANTA CATARINA  

E-print Network

INPE-12145-TDI/969 ANÁLISE DE EPIS�DIOS DE TORNADO EM SANTA CATARINA: CARACTERIZA��O SIN�TICA E. Análise de episódios de tornados em Santa Catarina: caracterização sinótica e mineração de dados / I. P. O(meteorologia). 3.Meteorologia sinótica. 4.Imagem de satélite. 5.Mineração de dados. 6.Paisagem. 7.Brasil. 8.Santa

261

Rotating-bed reactor as a power source for EM gun applications  

SciTech Connect

Electromagnetic gun applications of the Rotating Bed Reactor (RBR) are examined. The RBR is a compact (approx. 1 m/sup 3/), (up to several thousand MW(th)), high-power reactor concept, capable of producing a high-temperature (up to approx. 300/sup 0/K) gas stream with a MHD generator coupled to it, the RBR can generate electric power (up to approx. 1000 MW(e)) in the pulsed or cw modes. Three EM gun applications are investigated: a rail gun thruster for orbit transfer, a rapid-fire EM gun for point defense, and a direct ground-to-space launch. The RBR appears suitable for all applications.

Powell, J.; Botts, T.; Stickley, C.M.; Meth, S.

1980-01-01

262

"Separations: Dust to Dust" or " You Can't Escape Em"  

E-print Network

"SEPARATIONS: DUST TO DUST" OR "YOU CAN'T ESCAPE EM" Robert G. Massey Office of Industrial Programs U.S. Dept. of Energy ABSTRACT Separations are recognized by industry as one of the larger, if not the largest, energy using processes..."SEPARATIONS: DUST TO DUST" OR "YOU CAN'T ESCAPE EM" Robert G. Massey Office of Industrial Programs U.S. Dept. of Energy ABSTRACT Separations are recognized by industry as one of the larger, if not the largest, energy using processes...

Massey, R. G.

263

A laboratory experiment on EM backscatter from Farley-Buneman and gradient drift waves  

NASA Technical Reports Server (NTRS)

Results of laboratory experiment on Bragg backscatter of 3-cm microwaves by turbulent waves driven by the Farley-Buneman and gradient drift instabilities are reported. It is noted that the study is the third in a series of laboratory experiments performed to test, under controlled conditions, prevalent ideas on EM scattering by equatorial and high-latitude ionospheric waves and irregularities. It is shown through separate backscattering from fast and slow ion beam modes that a beam of EM radiation actually provides, in backscatter, information on the spectral content of the scattering medium.

Alport, M. J.; Dangelo, N.; Pecseli, H. L.

1981-01-01

264

ModEM: A modular system for inversion of electromagnetic geophysical data  

NASA Astrophysics Data System (ADS)

We describe implementation of a modular system of computer codes for inversion of electromagnetic geophysical data, referred to as ModEM. The system is constructed with a fine level of modular granularity, with basic components of the inversion - forward modeling, sensitivity computations, inversion search algorithms, model parametrization and regularization, data functionals - interchangeable, reusable and readily extensible. Modular sensitivity computations and generic interfaces to parallelized inversion algorithms provide a ready framework for rapid implementation of new applications or inversion algorithms. We illustrate the code's versatility and capabilities for code reuse through implementation of 3D magnetotelluric (MT) and controlled-source EM (CSEM) inversions, using essentially the same components.

Kelbert, Anna; Meqbel, Naser; Egbert, Gary D.; Tandon, Kush

2014-05-01

265

Quality assurance guidance for laboratory assessment plates in support of EM environmental sampling and analysis activities  

SciTech Connect

This document is one of several guidance documents developed to support the EM (DOE Environmental Restoration and Waste Management) Analytical Services program. Its purpose is to introduce assessment plates that can be used to conduct performance assessments of an organization`s or project`s ability to meet quality goals for analytical laboratory activities. These assessment plates are provided as non-prescriptive guidance to EM-support organizations responsible for collection of environmental data for remediation and waste management programs at DOE facilities. The assessments evaluate objectively all components of the analytical laboratory process to determine their proper selection and use.

Not Available

1994-05-01

266

The longitudinal study of turnover and the cost of turnover in EMS  

PubMed Central

Purpose Few studies have examined employee turnover and associated costs in emergency medical services (EMS). The purpose of this study was to quantify the mean annual rate of turnover, total median cost of turnover, and median cost per termination in a diverse sample of EMS agencies. Methods A convenience sample of 40 EMS agencies was followed over a 6 month period. Internet, telephone, and on-site data collection methods were used to document terminations, new hires, open positions, and costs associated with turnover. The cost associated with turnover was calculated based on a modified version of the Nursing Turnover Cost Calculation Methodology (NTCCM). The NTCCM identified direct and indirect costs through a series of questions that agency administrators answered monthly during the study period. A previously tested measure of turnover to calculate the mean annual rate of turnover was used. All calculations were weighted by the size of the EMS agency roster. The mean annual rate of turnover, total median cost of turnover, and median cost per termination were determined for 3 categories of agency staff mix: all paid staff, mix of paid and volunteer (mixed), and all-volunteer. Results The overall weighted mean annual rate of turnover was 10.7%. This rate varied slightly across agency staffing mix: (all-paid=10.2%, mixed=12.3%, all-volunteer=12.4%). Among agencies that experienced turnover (n=25), the weighted median cost of turnover was $71,613.75, which varied across agency staffing mix: (all-paid=$86,452.05, mixed=$9,766.65, and all-volunteer=$0). The weighted median cost per termination was $6,871.51 and varied across agency staffing mix: (all-paid=$7,161.38, mixed=$1,409.64, and all-volunteer=$0). Conclusions Annual rates of turnover and costs associated with turnover vary widely across types of EMS agencies. The study’s mean annual rate of turnover was lower than expected based on information appearing in the news media and EMS trade magazines. Findings provide estimates of two key workforce measures – turnover rates and costs – where previously none have existed. Local EMS directors and policymakers at all levels of government may find the results and study methodology useful towards designing and evaluating programs targeting the EMS workforce. PMID:20199235

Patterson, P. Daniel; Jones, Cheryl B.; Hubble, Michael W.; Carr, Matthew; Weaver, Matthew D.; Engberg, John; Castle, Nicholas

2010-01-01

267

QUANDO A HISTÓRIA INVADE A CENA: O CASO VLADIMIR HERZOG (RE)SIGNIFICADO POR FERNANDO PEIXOTO EM \\  

Microsoft Academic Search

Primeiramente, deve-se ressaltar que a proposta desta pesquisa (que se encontra em estágio inicial e que, portanto, muitos questionamentos são apenas apontados neste texto) é uma reflexão sobre a encenação do espetáculo teatral Ponto de Partida de Gianfrancesco Guarnieri, em 1976, no Teatro TAIB (SP), numa produção de Othon Bastos Produções Artísticas e Documenta Produções Artísticas. Neste sentido, tais análises

Ludmila Sá de Freitas

268

Hamartoma fibrolipomatoso e macrodistrofia lipomatosa: análise dos achados clínicos e de imagem em quatro casos, com revisão da literatura  

Microsoft Academic Search

O hamartoma fibrolipomatoso neural e a macrodistrofia lipomatosa são doenças raras, com achados de imagem característicos. Radiografias simples, estudos de ressonância magnética e prontuários médicos de quatro pacientes foram revisados. Em um paciente, foi realizada cirurgia com confirmação histopatológica. Em três pacientes, os achados clínicos e de imagem foram considerados suficientes para o diagnóstico. Descreve- mos dois casos de macrodistrofia

Rafael Darahem de Souza Coelho; Marcelo Novelino Simão; Clóvis Simão Trad

2002-01-01

269

A hybrid ML-EM algorithm for calculation of maximum likelihood estimates in semiparametric shared frailty models  

Microsoft Academic Search

This paper describes a generalised hybrid ML-EM algorithm for the calculation of maximum likelihood estimates in semiparametric shared frailty models, the Cox proportional hazard models with hazard functions multiplied by a (parametric) frailty random variable. This hybrid method is much faster than the standard EM method and faster than the standard direct maximum likelihood method (ML, Newton–Raphson) for large samples.

Hien T. V. Vu; Matthew W. Knuiman

2002-01-01

270

A gente mora na estrada e passeia em casa: Carga Pesada, um road-movie na TV  

Microsoft Academic Search

Resumo: O artigo em questão volta-se para uma análise do programa de televisão Carga Pesada, exibido pela Rede Globo de Televisão, distinguindo os dois períodos em que foi produzido e exibido - início da década de 80 e atual. Trata-se de compreender quais são suas influências e que estratégias de linguagens são absorvidas pelo programa. Sua relação com o cinema

FELIPE MUANIS

271

The Value of Bus Rapid Transit: Hedonic Price Analysis of the EmX in Eugene, Oregon  

E-print Network

1 The Value of Bus Rapid Transit: Hedonic Price Analysis of the EmX in Eugene, Oregon Peter of the bus rapid transit (BRT) line in the Eugene area based on changes in residential property values of the EmX in Eugene. #12;2 Table of Contents I. Introduction

Oregon, University of

272

Relação entre índice de massa corporal e habilidade motora grossa em crianças de quatro a seis anos  

Microsoft Academic Search

RESUMO Este estudo teve por objetivo verificar a relação entre o desem- penho em tarefas de habilidade motora grossa com o índice de massa corporal (IMC) em meninos e meninas de quatro a seis anos de idade. Para tanto, foram analisadas 27 crianças, sendo 16 meninos e 11 meninas, com idade média de 5,64 ± 0,67 anos. As crianças foram

Fabrizio Zandonadi Catenassi; Inara Marques; Carina Barbiero Bastos; Luciano Basso; Enio Ricardo Vaz Ronque; Aline Mendes Gerage

2007-01-01

273

A Spectrum of EM-Type Mantle Endmembers (Invited)  

NASA Astrophysics Data System (ADS)

It has been a quarter century since White (1985) and Zindler and Hart (1986) proposed that Sr-Nd-Pb isotope ratios of oceanic basalts can be described as mixtures of depleted mantle (DMM) with a limited number of enriched global endmember components (HIMU, EMI, EMII). While the global endmembers clearly represent extremes of the timing and magnitude of mantle chemical fractionation processes, it remains a matter of debate how the intermediate isotopic compositions are formed. (1) Do they represent mixtures between the limited number of global endmembers? (2) Do they reflect processes intermediate to those forming the global endmembers? (3) Does each intermediate composition OIB suite reflect a unique timing and type of geochemical differentiation that forms its mantle source? Each possibility has important geodynamic implications. The Earth’s mantle continuously undergoes chemical fractionation through partial melting during crust formation, and remixing through plate tectonic recycling and convection, suggesting variable timing and compositions of mantle sources forming OIB. However, such sources are likely composed of mixed lithologies (e.g. depleted peridotite and more enriched pyroxenite) and thus even extreme melt compositions might reflect mixtures of even more extreme compositions, possibly representing the global endmembers. We further address these questions based on two examples. Grande Comore Island is located on ca. 140 Ma Indian Ocean lithosphere and its lavas reflect plume-lithosphere interaction. The Grande Comore plume component has Sr-Nd-Pb isotopic compositions intermediate between HIMU and EMI, but its Os isotope ratios are extreme and among the highest measured in OIB shield building lavas. This further supports the presence of generally high Os isotope ratios in EMI and HIMU compositions. Globally in OIB, high Os isotope ratios do not correlate with lithospheric thickness, implying that high Os isotopes are not solely controlled by melt dynamics, but require variable proportions of pyroxenite/peridotite in individual OIB sources. Moreover, new isotope data from the second example, the Discovery Seamounts in the South Atlantic, reveal a continuum of compositions between the extreme EMI composition of Walvis Ridge DSDP 525A and the LOMU extreme of anomalous South Atlantic MORB related to the Discovery hotspot (Douglass et al., 1999). These compositional extremes require a range of enriched mantle compositions outside the mixing tetrahedron of the global endmembers. In the global context, each OIB suite with EM affinity appears to form a trend towards its own unique enriched mantle endmember, inconsistent with mixing between narrowly defined global endmembers. This wide spectrum of enriched mantle endmembers is consistent with a dynamic Earth that is continuously recycling varying proportions of oceanic crust and depleted peridotite, plus sediment and lower continental crust. Douglass, J., Schilling, J.-G. and Fontignie, D., 1999. J. Geophys. Res., 104: 2941-2962. White, W.M., 1985. Geology, 13: 115-118. Zindler, A. and Hart, S., 1986. Ann. Rev. Earth Planet. Sci., 14: 493-571.

Class, C.; Goldstein, S. L.; Shirey, S. B.; Le Roex, A. P.; O'Connor, J. M.; Jokat, W.

2009-12-01

274

Theoretical and FEM analysis of suspension and propulsion system with HTS hybrid electromagnets in an EMS Maglev model  

NASA Astrophysics Data System (ADS)

We have been constructed a proto-type electromagnetic suspension (EMS) based maglev vehicle system. The maglev concept utilizes magnetic forces for noncontact suspension, guidance and propulsion. The suspension system with high temperature superconducting (HTS) hybrid electromagnet (EM) is composed of HTS coils and normal coils, which consume little power to keep large suspension gap. The magnetic forces realize to guide the vehicle, propel the vehicle along the guide-way and assist in braking action. The proto-type EMS-based Maglev model is designed to keep the suspension gap of 20 mm. This paper presents the theoretical analysis of the maglev vehicle based on the EMS model to obtain the designing parameters for levitation and propulsion forces. The magnetic field distributions of the electromagnetic forces with hybrid EM and propulsion stator coils are analyzed based on three dimension (3D) finite element method (FEM) analysis. From the simulation results, appropriately design parameters of the suspension, guidance and propulsion were obtained.

Chung, Y. D.; Lee, C. Y.; Jang, J. Y.; Yoon, Y. S.; Ko, T. K.

2011-11-01

275

O Prof. Paulo Helene Professor Titular da Universidade de So Paulo, Educador, Pesquisador renomado e respeitado Consultor. Engenheiro Civil, EPUSP. Especialista em "Patologa de las Construcciones", Instituto  

E-print Network

Califórnia em Berkeley, USA. Consultor do Concreto de Alto Desempenho HPC utilizado no Edifício mais alto do concreto bombeado no país. Autor do CD desenvolvido em colaboração com a ABCP, destinado ao projeto, Execução e Controle de Estruturas de Concreto usando HPC, publicado em 1999. Em 2002 alcançou o Recorde

Paraná, Universidade Federal do

276

Estimating Word Translation Probabilities from Unrelated Monolingual Corpora Using the EM Algorithm  

Microsoft Academic Search

Selecting the right word translation among several op- tions in the lexicon is a core problem for machine trans- lation. We present a novel approach to this problem that can be trained using only unrelated monolingual corpora and a lexicon. By estimating word translation probabilities using the EM algorithm, we extend upon target language modeling. We construct a word trans-

Philipp Koehn; Kevin Knight

2000-01-01

277

Accelerated Iterative Reconstruction for Positron Emission Tomography Based on the EM Algorithm for Maximum Likelihood Estimation  

Microsoft Academic Search

The EM method that was originally developed for maximum likelihood estimation in the context of mathematical statistics may be applied to a stochastic model of positron emission tomography (PET). The result is an iterative algorithm for image reconstruction that is finding increasing use in PET, due to its attractive theoretical and practical properties. Its major disadvantage is the large amount

Robert M. Lewitt; Gerd Muehllehner

1986-01-01

278

Longer term impacts of transformed courses on student conceptual understanding of E&M  

NSDL National Science Digital Library

We have measured upper-division physics majors' performance using two research-based conceptual instruments in E&M, the BEMA and the CUE (Colorado Upper Division Electrostatics assessment.) The BEMA has been given pre/post in freshman E&M (Physics II) courses, and the BEMA and CUE have been given pre/post in several upper-division E&M courses. Some of these data extend over 10 semesters. We used PER-based techniques to transform the introductory and upper-division courses starting in Fall 2004 and 2007, respectively. Our longitudinal data allow us to measure "fade" on BEMA performance between freshman and junior year. We investigate the effects of curricula on students by comparing juniors who were enrolled in traditional vs. transformed physics as freshmen, as well as those who were enrolled in traditional or transformed upper-division E&M I, using both BEMA and CUE measures. We find that while freshman reforms significantly impact BEMA scores, junior-level reforms affect CUE but not BEMA outcomes.

Pollock, Steven J.; Chasteen, Stephanie V.

2010-01-19

279

PEDRO ALMODÓVAR ANALISTA DE SI MESMO?1 A movida madrileña em \\  

Microsoft Academic Search

Resumo: Este artigo analisa as primeiras produções cinematográficas de Pedro Almodóvar identificadas ao movimento artístico-cultural denominado de movida madrilena. Busca-se relacionar o que Pierre Bourdieu chama em seu livro As Regras da Arte de visão socióloga do escritor francês Gustave Flaubert, construída na obra A educação sentimental, com a hipótese de o cineasta espanhol Pedro Almodóvar também se revelar um

Meize Regina de Lucena; Gustavo Colares; Melo Carlos

280

Em busca da caixa mágica: o Estado Novo e a televisão  

Microsoft Academic Search

RESUMO A análise histórica sobre a Exposição de Televisão (Rio de Janeiro, 1939), evento promovido pelo Estado Novo em parce- ria com o Terceiro Reich alemão, permi- te trazer, além de dados sobre a história da TV no Brasil, elementos de compreen- são sobre as primeiras relações entre po- der político e esse meio de comunicação no país. Pois, a

Áureo Busetto

2007-01-01

281

Crosshole EM for oil field characterization and EOR monitoring: Field examples from Lost Hills, California  

Microsoft Academic Search

A steamflood recently initiated by Mobil Development and Production U.S. at the Lost Hills No 3 oil field in California is notable for its shallow depth and the application of electromagnetic (EM) geophysical techniques to monitor the subsurface steam flow. Steam was injected into three stacked eastward-dipping unconsolidated oil sands at depths from 60 to 120 m; the plume is

Michael Wilt; Clifford Schenkel; Michael Wratcher; Ilia Lambert; Carlos Torres-Verdin; Tseng H. W

1996-01-01

282

De-centralized and centralized control for realistic EMS Maglev systems  

NASA Astrophysics Data System (ADS)

A comparative study of de-centralized and centralized controllers when used with real EMS Maglev Systems is introduced. This comparison is divided into two parts. Part I is concerned with numerical simulation and experimental testing on a two ton six-magnet EMS Maglev vehicle. Levitation and lateral control with these controllers individually and when including flux feedback control in combination with these controllers to enhance stability are introduced. The centralized controller is better than the de-centralized one when the system is exposed to a lateral disturbing force such as wind gusts. The flux feedback control when combined with de-centralized or centralized controllers does improve the stability and is more resistant and robust with respect to the air gap variations. Part II is concerned with the study of Maglev vehicle-girder dynamic interaction system and the comparison between these two controllers on this typical system based on performance and ride quality achieved. Numerical simulations of the ODU EMS Maglev vehicle interacting with girder are conducted with these two different controllers. The de-centralized and centralized control for EMS Maglev systems that interact with a flexible girder provides similar ride quality. Centralized control with flux feedback could be the best controller for the ODU Maglev system when operating on girder. The centralized control will guarantee the suppression of the undesired lateral displacements; hence it will provide smoother ride quality. Flux feedback will suppress air gap variations due to the track discontinuities.

Moawad, Mohamed M. Aly M.

283

Concepções de policiais sobre crianças em situação de rua: um estudo sobre preconceito  

Microsoft Academic Search

Resumo O objetivo deste estudo foi investigar a concepção que policiais militares têm das crianças em situação de rua. Pela técnica da inserção ecológica, doze policiais homens foram selecionados ao acaso e entrevistados nas ruas perante um roteiro pré-estabelecido. Foi realizada uma análise qualitativa do conteúdo das entrevistas e de diários de campo dos pesquisadores. Os critérios utilizados pelos policiais

Elder Cerqueira-Santos; Sílvia H. Koller; Christian Pilz; Daniela D. Dias; Flávia Wagner

2006-01-01

284

The VLF-EM imaging of potential collapse on the LUSI embankment  

NASA Astrophysics Data System (ADS)

Collapse and overtopping repeatedly occur in LUSI Embankment. Discontinuities (crack or fracture) in the embankment are major reasons for embankment failures or collapses. Very-low frequency electromagnetic (VLF-EM) measurement is essentially a non-destructive technique which displays subsurface 2-D cross section of resistivity. The cross section result has the possibility of detecting discontinuities and liquid saturation in embankment before it collapsed by observing which part of it in the cross section has low resistivity. This paper presents results of a survey conducted at the LUSI embankment in Eastern Java, Indonesia in a part of potential collapse. VLF-EM profiles measured along the embankment crest provided an overview of the whole embankment and served to detect anomalous zones. The noise assisted multivariate empirical mode decomposition (NA-MEMD) is applied to reject unwanted VLF-EM noise and Inv2DVLF software is applied to obtain result of 2-D resistivity models. In the selected area, the drill log and the standard penetration test (SPT) value gave detailed information about subsurface layer below embankment. This information is valuable for supporting 2-D resistivity image obtained from VLF-EM data inversion. Furthermore, the low resistivity in embankment layer is associated to discontinuities (fracture, crack or fault) along the embankment which caused its collapse.

Sungkono; Husein, Alwi; Prasetyo, Hardi; Bahri, Ayi S.; Monteiro Santos, Fernando A.; Santosa, Bagus J.

2014-10-01

285

POTENTIAL AND PERSPECTIVES FOR APPLICATION OF ENVIRONMENTAL MANAGEMENT SYSTEM (EMS) AND ISO 14000 TO FOOD INDUSTRIES  

Microsoft Academic Search

ISO 14000 is considered a newcomer in the environmental management systems, but it is gradually gaining worldwide acceptance (10,000 certificates by June 1999). Although the food industry was not one of the first industrial sectors to implement EMS\\/ISO 14000, recent surveys in industrialized countries show that more than 1000 food companies worldwide have already applied the ISO 14001. The popular

Ioannis D. Boudouropoulos; Ioannis S. Arvanitoyannis

2000-01-01

286

www.energy.psu.edu The EMS Energy Institute at Penn State is a leading research  

E-print Network

www.energy.psu.edu The EMS Energy Institute at Penn State is a leading research and development organization focused on energy science and engineering. We are committed to: -- Providing academic and technical leadership in the development and assessment of energy technologies, -- Providing Penn State

Lee, Dongwon

287

Magnetic Properties of the Basalt in Hole EM 7, Mohole Project  

Microsoft Academic Search

The average direction of the remanent magnetization of the basalt layer at the bottom of hole EM 7 is inclined 36 ø above tile horizontal, indicating that the layer is reversely magnetized. Detailed demagnetization experiments with alternating magnetic fields to 800 oer- steds peak intensity indicate that the drilling operations did not remagnetize the basalts. The natural magnetization is extremely

Allan Cox; Richard R. Doell

1962-01-01

288

EM+TV for Reconstruction of Cone-beam CT with Curved Detectors using GPU  

E-print Network

EM+TV for Reconstruction of Cone-beam CT with Curved Detectors using GPU Jianwen Chen, Ming Yan with CT is significant. Methods that can enable CT imaging at reduced radiation exposure without improved reconstruction at lower radiation exposure levels. The method is based on the combination of 1

Cong, Jason "Jingsheng"

289

Responsabilidade Civil do Construtor e sua Aplicação em Auditoria de Obras Públicas  

Microsoft Academic Search

Em auditorias de obras públicas, diversos fatores que podem implicar a má qualidade e pouca durabilidade do trabalho não podem ser efetivamente verificados. Diversos problemas, tais quais: má qualidade de materiais, má qualidade de mão- de-obra e inadequação de projetos, que adversamente afetarão a qualidade da obra, a sua durabilidade e a sua funcionalidade, dificilmente podem ser constatados durante as

Carnot Leal Nogueira

290

An EM Algorithm for Maximum Likelihood Estimation of Process Factor Analysis Models  

ERIC Educational Resources Information Center

In this dissertation, an Expectation-Maximization (EM) algorithm is developed and implemented to obtain maximum likelihood estimates of the parameters and the associated standard error estimates characterizing temporal flows for the latent variable time series following stationary vector ARMA processes, as well as the parameters defining the…

Lee, Taehun

2010-01-01

291

Color fusion based on EM algorithm for IR and visible image  

Microsoft Academic Search

As two of the most commonly used image sensors in night-vision for military applications, infrared (IR) and visible light cameras have their own advantages and limitations due to the physical differences between the image formation processes. In this paper, a new multi-scale scheme for color image fusion is presented using EM algorithm and color transfer algorithm for IR and visible

Gang Liu; Guohong Huang

2010-01-01

292

"Science affects the way we think together." SEEN ONE DAM, SEEN `EM ALL?  

E-print Network

debate about removal of dams from the Columbia and Snake Rivers, an interesting twist emerges from"Science affects the way we think together." SEEN ONE DAM, SEEN `EM ALL?: THE SURPRISING STORY of private dams will be relicensed by the Federal Energy Regulatory Commission. Many of them

293

Curso de posgraduac~ao em Astrofisica Prova de admiss~ao  

E-print Network

, pergunta-se: qual m´inima dist^ancia deve separar dois pontos sobre a superf´icie lunar para que estes´ermicos - = Wciclo / QA 5 #12;onde Wciclo ´e o trabalho realizado em um ciclo de funcionamento do motor e QA ´e

294

A very accurate design of monolithic inductors in a 2D EM simulator  

Microsoft Academic Search

This work discusses a strategy for the design of monolithic inductors through 2D EM simulations. Two different types of inductors are considered which were fabricated in a high frequency bipolar silicon process. The first type is an inductor on a traditional substrate with a solid n+-doped buried layer, the second type is an inductor on a substrate with an oxide

Egidio Ragonese; Giovanni Girlando; Giuseppe Palmisano

2002-01-01

295

SISTEMA DE POSICIONAMENTO AUTOMÁTICO PARA AUMENTAR A CONVERSÃO DE ENERGIA EM PAINÉIS FOTOVOLTAICOS  

Microsoft Academic Search

Resumo - Este trabalho apresenta um sistema de posicionamento automático para painéis fotovoltaicos, com o objetivo de melhorar a conversão da energia solar em energia elétrica. Um protótipo com movimentação automática foi desenvolvido e sua eficiência na geração de energia foi comparada a outro sistema com as mesmas características, porém fixo. Resultados obtidos demonstram um aumento significativo na eficiência, obtido

Alceu F. Alves; José A. Cagnon; José R. C. P. Fraga

296

Environmental Cost Analysis System (ECAS) Status and Compliance Requirements for EM Consolidated Business Center Contracts - 13204  

SciTech Connect

The Department of Energy (DOE) Office of Environmental Management (EM) has developed a web-accessible database to collect actual cost data from completed EM projects to support cost estimating and analysis. This Environmental Cost Analysis System (ECAS) database was initially deployed in early 2009 containing the cost and parametric data from 77 decommissioning, restoration, and waste management projects completed under the Rocky Flats Closure Project. In subsequent years we have added many more projects to ECAS and now have a total of 280 projects from 8 major DOE sites. This data is now accessible to DOE users through a web-based reporting tool that allows users to tailor report outputs to meet their specific needs. We are using it as a principal resource supporting the EM Consolidated Business Center (EMCBC) and the EM Applied Cost Engineering (ACE) team cost estimating and analysis efforts across the country. The database has received Government Accountability Office review as supporting its recommended improvements in DOE's cost estimating process, as well as review from the DOE Office of Acquisition and Project Management (APM). Moving forward, the EMCBC has developed a Special Contract Requirement clause or 'H-Clause' to be included in all current and future EMCBC procurements identifying the process that contractors will follow to provide DOE their historical project data in a format compatible with ECAS. Changes to DOE O 413.3B implementation are also in progress to capture historical costs as part of the Critical Decision project closeout process. (authors)

Sanford, P.C. [Consultant, 11221 E. Cimmarron Dr., Englewood, CO 80111 (United States)] [Consultant, 11221 E. Cimmarron Dr., Englewood, CO 80111 (United States); Moe, M.A. [EMCBC Office of Cost Estimating and Analysis, United States Department of Energy, 250 E. 5th Street, Suite 500, Cincinnati, OH 45202 (United States)] [EMCBC Office of Cost Estimating and Analysis, United States Department of Energy, 250 E. 5th Street, Suite 500, Cincinnati, OH 45202 (United States); Hombach, W.G. [Team Analysis, Inc., 2 Cardinal Park Drive, Suite 105A, Leesburg, VA 20175 (United States)] [Team Analysis, Inc., 2 Cardinal Park Drive, Suite 105A, Leesburg, VA 20175 (United States); Urdangaray, R. [Project Performance Corporation, 1760 Old Meadow Road, McLean, VA 22102 (United States)] [Project Performance Corporation, 1760 Old Meadow Road, McLean, VA 22102 (United States)

2013-07-01

297

Medicina Baseada em Evidências: a arte de aplicar o conhecimento científico na prática clínica  

Microsoft Academic Search

RESUMO - Este artigo foi escrito com o objetivo de descrever o conceito de Medicina Baseada em Evidências (MBE) e as competências necessárias para a sua prática. MBE deve ser vista como a integração da experiência clínica com a capacida- de de analisar e aplicar racionalmente a informa- ção científica ao cuidar de pacientes. A aplicação de métodos e estratégias

A. A. Lopes

2000-01-01

298

Dendrite Tracking in Microscopic Images using Minimum Spanning Trees and Localized E-M  

E-print Network

Dendrite Tracking in Microscopic Images using Minimum Spanning Trees and Localized E-M Fran properties of the complete set of dendrites. The optimal tree is obtained with a modified minimum such as Neurolucida1, Imaris2 or Metamorph3 provide with pow- erful interfaces to reconstruct dendritic trees

Fleuret, François

299

Convergence results for the EM approach to mixtures of experts architectures \\Lambda  

E-print Network

Head: Convergence results for mixtures of experts *Address for correspondence: Michael I. Jordan, E10 to support an Initiative in Intelligent Control at MIT. Michael I. Jordan is a NSF Presidential YoungConvergence results for the EM approach to mixtures of experts architectures \\Lambda Michael I

Jordan, Michael I.

300

Laboratory experiment on EM backscatter from Farley-Buneman and gradient drift waves  

SciTech Connect

Results are reported of a laboratory experiment on Bragg backscatter of 3-cm microwaves by turbulent waves driven by the Farley-Buneman and gradient drift instabilities. The present work is the third in a series of laboratory experiments performed to test, under controlled conditions, prevalent ideas on EM scattering equatorial and high-latitude ionospheric waves and irregularities.

Alport, M.J.; D'Angelo, N.; Pecseli, H.L.

1981-09-01

301

A caminho do topo Criar em Portugal uma universidade de dimenso mdia no plano europeu,  

E-print Network

Lisboa (a antiga "Cl�ssica") e T�cnica de Lisboa teve o objetivo de criar uma nova institui��o: a maior (a antiga "Cl�ssica") com a Universidade T�cnica de Lisboa. Que cuidados foram necess�rios ter em

Instituto de Sistemas e Robotica

302

External Resource: Earth-Moon-Sun Dynamics: Building the EMS Model  

NSDL National Science Digital Library

In this unit of study, students participate in iterative model building as they encounter patterns in various celestial phenomena and attempt to provide a causal explanation for them. Each of the six materials within Building the EMS Model focuses on a di

1900-01-01

303

Precision and accuracy of regional radioactivity quantitation using the maximum likelihood EM reconstruction algorithm  

Microsoft Academic Search

The imaging characteristics of maximum likelihood (ML) reconstruction using the EM algorithm for emission tomography have been extensively evaluated. There has been less study of the precision and accuracy of ML estimates of regional radioactivity concentration. The authors developed a realistic brain slice simulation by segmenting a normal subject's MRI scan into gray matter, white matter, and CSF and produced

Richard E. Carson; Yuchen Yan; BettyAnn Chodkowski; Tieng K. Yap; Margaret E. Daube-Witherspoon

1994-01-01

304

UFF/PROGEPE/CASQ/DPVS Diviso de Promoo e Vigilncia em Sade-DPVS  

E-print Network

fumantes sendo 47% homens e 12% mulheres. No Brasil, em pesquisa recente do INCA/MS, os dados apontaram para 18,8% da população brasileira como fumante, sendo 22,7% homens e 16% mulheres. Também no Brasil

Souza, Max O.

305

G EM OF HI E MO UNTA I S 2 (piece by pieee)  

E-print Network

#12;#12;#12;#12;I ) #12;G EM OF HI E MO UNTA I S 2 (piece by pieee) student life academics #12;GEM and players alike motivated for the upcoming football game. ABOVE- Joe Vandal rings the bell in celebration people on the stage, and no pre-recorded music. FAR, LEFT - Onlookers clap as the Ul marching band

O'Laughlin, Jay

306

Monte Carlo EM for Generalized Linear Mixed Models using Randomized Spherical Radial  

E-print Network

Monte Carlo EM for Generalized Linear Mixed Models using Randomized Spherical Radial Integration by Monte Carlo methods. However, in practice, the Monte Carlo sample sizes required for convergence for such methods. One solution is to use Monte Carlo approximation, as proposed by Wei and Tanner (1990

Booth, James

307

Relativistic MHD in dynamical spacetimes: Improved EM gauge condition for AMR grids  

E-print Network

We recently developed a new general relativistic magnetohydrodynamic code with adaptive mesh refinement that evolves the electromagnetic (EM) vector potential (A) instead of the magnetic fields directly. Evolving A enables one to use any interpolation scheme on refinement level boundaries and still guarantee that the magnetic field remains divergenceless. As in classical EM, a gauge choice must be made when evolving A, and we chose a straightforward "algebraic" gauge condition to simplify the A evolution equation. However, magnetized black hole-neutron star (BHNS) simulations in this gauge exhibit unphysical behavior, including the spurious appearance of strong magnetic fields on refinement level boundaries. This spurious behavior is exacerbated when matter crosses refinement boundaries during tidal disruption of the NS. Applying Kreiss-Oliger dissipation to the evolution of the magnetic vector potential A slightly weakens this spurious magnetic effect, but with undesired consequences. We demonstrate via an eigenvalue analysis and a numerical study that zero-speed modes in the algebraic gauge, coupled with the frequency filtering that occurs on refinement level boundaries, are responsible for the creation of spurious magnetic fields. We show that the EM Lorenz gauge exhibits no zero-speed modes, and as a consequence, spurious magnetic effects are quickly propagated away, allowing for long-term, stable magnetized BHNS evolutions. Our study demonstrates how the EM gauge degree of freedom can be chosen to one's advantage, and that for magnetized BHNS simulations the Lorenz gauge constitutes a major improvement over the algebraic gauge.

Zachariah B. Etienne; Vasileios Paschalidis; Yuk Tung Liu; Stuart L. Shapiro

2011-10-20

308

Improvement of coverage and utilization of EmOC services in southwestern Bangladesh  

Microsoft Academic Search

ObjectiveThe Government of Bangladesh has implemented safe motherhood programs throughout the country supported by the United Nations Children's Fund (UNICEF) and United Nations Population Fund (UNFPA) aimed at reducing maternal morbidity and mortality. The objective of this study is to assess the effect of the interventions on the UN emergency obstetric care (EmOC) process indicators in Khulna division, Bangladesh.

M. T. Islam; M. M. Hossain; M. A. Islam; Y. A. Haque

2005-01-01

309

Zonation of intertidal macrobenthos in the estuaries of Schelde and Ems  

Microsoft Academic Search

Based on data, collected in 1980–1990, the intertidal benthic macrofauna of the Schelde and Ems estuaries was compared. The spatial occurrence of the benthic macrofauna along the salinity gradient, including the freshwater tidal area was emphasized. Both estuaries appeared to have a very similar species composition, especially at genus level. The higher number of species observed in the Schelde estuary

T. Ysebaert; P. Meire; J. Coosen; K. Essink

1998-01-01

310

A spectral domain approach to modelling of EM scattering for Synthetic Aperture Radar target recognition  

Microsoft Academic Search

A Fourier-based technique for electromagnetic (EM) wave reconstruction with application to polarimetric airborne and spaceborne radar data exploitation is presented. The method is different from conventional modelling techniques for Synthetic Aperture Radar (SAR) applications as a result of the full electromagnetic treatment of field interactions with the scatterer, the possibility of introducing new and controllable feature classes for target classification,

R. Sabry; P. W. Vachon

2005-01-01

311

Respostas posturais à perturbação externa inesperada em judocas de diferentes níveis de habilidade  

Microsoft Academic Search

RESUMO O judô é uma modalidade esportiva na qual é requerido o con- trole eficiente do equilíbrio pelo atleta, por estar constantemente sujeito a movimentos inesperados impostos por seus adversários. Este estudo teve o objetivo de analisar as respostas posturais a uma perturbação externa inesperada de judocas (n = 20) em dois níveis de habilidade (faixas marrom e verde) e

Sheylla Kyoko Yoshitomi; Clarice Tanaka; Marcos Duarte; Fernanda Lima; Edgard Morya; Fuad Hazime

2006-01-01

312

The St em Cell and Regenerat ive Medicine Cent er Post doct oral Fellowships  

E-print Network

The St em Cell and Regenerat ive Medicine Cent er Post doct oral Fellowships I. General Information and highlights the significance of the work in stem cell biology and/or regenerative medicine (1 page). #12;III: Address Line #2: City: State: Zip Code: Country: Racial/Ethnic Heritage (optional): American Indian

313

Are you under stress in EMS. Understanding the slippery slope of burnout and PTSD.  

PubMed

Burnout and PTSD are closely linked and often underreported in EMS. EMS classrooms do little or nothing to prepare providers for the inherent emotional stresses of emergency response and the "thick skin" culture of EMS may make many providers apprehensive about sharing their true feelings. Burnout is triggered by many of the same stresses that lead to the symptoms of PTSD and providers experiencing burnout that doesn't resolve within a few weeks may actually be experiencing PTSD. Be mindful of yourself and your fellow coworkers, particularly after a very traumatic response. And remember traumatic responses don't need to be as dramatic as Sept. 11, New Orleans after Hurricane Katrina or the Aurora, CO shootings to bother an EMS worker. In contrast, these are the calls where providers often receive the most attention. Instead, watch for the new father who just performed CPR on an infant the same age as his own, or the provider who just watched his or her friend die following a motor vehicle collision. Pay attention to yourself and colleagues, and be responsible and honest with yourself and others about when coping strategies are enough, and when they aren't. Finally, don't ever be afraid to seek help. PMID:23097838

Collopy, Kevin T; Kivlehan, Sean M; Snyder, Scott R

2012-10-01

314

THE MULTIVARIATE NORMAL INVERSE GAUSSIAN DISTRIBUTION: EM-ESTIMATION AND ANALYSIS OF SYNTHETIC APERTURE SONAR DATA  

Microsoft Academic Search

The heavy-tailed Multivariate Normal Inverse Gaussian (MNIG) distribution is a recent variance-mean mixture of a multivariate Gaussian with a univariate inverse Gaussian distribution. Due to the complexity of the likelihood function, parameter estimation by direct maximization is exceedingly difficult. To overcome this problem, we propose a fast and accurate multivariate Expectation- Maximization (EM) algorithm for maximum likelihood estimation of the

Tor Arne Øigård; Alfred Hanssen; Roy Edgar Hansen

315

An EM Approach for Poisson-Gaussian Noise Modeling Anna Jezierska  

E-print Network

the associated Poisson process is nonstationary in space and also exhibits an exponential decay in time, whereas the parameters of a probability distribution constitutes a fundamental task in many statistical signal processingAn EM Approach for Poisson-Gaussian Noise Modeling Anna Jezierska , Caroline Chaux, Jean

Boyer, Edmond

316

Quality Control of CNT Forests via EM Probing Tianyou Kou, C. Emre Koksal, and Eylem Ekici  

E-print Network

, especially for flat-panel displays. During the process of growing the CNT forests, it is highly probable. Rather than relying on the oscillation of electrons inside the antenna in response to EM waves, CNTs was first proposed in [1] to use CNTs as non- traditional antennas to receive RF signals, further analyzed

Koksal, Can Emre

317

A row-action alternative to the EM algorithm for maximizing likelihood in emission tomography  

Microsoft Academic Search

The maximum likelihood (ML) approach to estimating the radioactive distribution in the body cross section has become very popular among researchers in emission computed tomography (ECT) since it has been shown to provide very good images compared to those produced with the conventional filtered backprojection (FBP) algorithm. The expectation maximization (EM) algorithm is an often-used iterative approach for maximizing the

Jolyon Browne; Alvaro R. De Pierro

1996-01-01

318

ARALES DE LAGOAS EM UMA ÁREA DO SEMI-ÁRIDO BAIANO  

Microsoft Academic Search

RESUMO — O presente trabalho trata das espécies de Arales ocorrentes em lagoas de uma área do semi-árido baiano. A ordem apresenta, no local, duas famílias com cinco espécies: Lemna valdiviana Phil., Lemna aequinoctialis Welwitsch, Wolffiella lingulata (Hegelm.) Hegelm. e Wolffia columbiana Karsten (LEMNACEAE) e Pistia stratiotes L. (ARACEAE). PALAVRAS-CHAVE: Arales; plantas aquáticas; Lemnaceae; Araceae. ABSTRACT — This paper presents

Márcia Gonçalves Bezerra; Flávio França

319

Review Article Abstract: Many plant species abort a large fraction of their em-  

E-print Network

Review Article Abstract: Many plant species abort a large fraction of their em- bryos. It has often abort- ed. Such selective embryo abortion would lead to investment of resources only in the offspring with the highest potential fit- ness. Many studies have shown that otherwise viable embryos are aborted. However

Klinkhamer, Peter

320

Dynamic partnership: A new approach to EM technology commercialization and deployment  

SciTech Connect

The task of restoring nuclear defense complex sites under the U.S. Department of Energy (DOE) Environmental Management (EM) Program presents an unprecedented challenge to the environmental restoration community. Effective and efficient cleanup requires the timely development or modification of novel cleanup technologies applicable to radioactive wastes. Fostering the commercialization of these innovative technologies is the mission of EM-50, the EM Program Office of Science and Technology. However, efforts are often arrested at the {open_quotes}valley of death,{close_quotes} the general term for barriers to demonstration, commercialization, and deployment. The Energy & Environmental Research Center (EERC), a not-for-profit, contract-supported organization focused on research, development, demonstration, and commercialization (RDD&C) of energy and environmental technologies, is in the second year of a cooperative agreement with the U.S. Department of Energy (DOE) Morgantown Energy Technology Center (METC) designed to deliver EM technologies into the commercial marketplace through a unique combination of technical support, real-world demonstration, and brokering. This paper profiles this novel approach, termed {open_quotes}Dynamic Partnership,{close_quotes} and reviews the application of this concept to the ongoing commercialization and deployment of four innovative cleanup technologies. 2 tabs.

Daly, D.J.; Erickson, T.A.; Groenewold, G.H. [and others

1996-12-31

321

EmNet: Satisfying The Individual User Through Empathic Home Networks: Summary  

E-print Network

EmNet: Satisfying The Individual User Through Empathic Home Networks: Summary John R. Lange J, Empathic Systems, Human Factors 1. INTRODUCTION Increasingly, computer systems and networks are used to run. Measuring individual user sat- isfaction online and then using such measurements directly in the control

Dinda, Peter A.

322

Serological (Em2-ELISA) and parasitological examinations of fox populations for Echinococcus multilocularis infections.  

PubMed

Serum or body fluid samples of 1,006 foxes were investigated in an ELISA for antibodies against a highly sensitive and specific antigen (Em2-antigen) of Echinococcus multilocularis. Parasitological examinations of the intestines and simultaneous serological examinations were carried out in 505 foxes: A group of 98 blue foxes (Alopex lagopus) from Norwegian fox farms did not contain intestinal stages of E. multilocularis and was clearly sero-negative in Em2-ELISA. On the other hand in red foxes (Vulpes vulpes) originating from European areas known to be endemic for E. multilocularis the following average prevalence rates were found: 244 foxes from Southern Germany, E. multilocularis prevalence 55% and sero-prevalence 60%; 139 foxes from Austria, E. multilocularis prevalence 4% and sero-prevalence 12%. Serological identification of individual foxes with or without intestinal E. multilocularis infection was not possible. Only serological (no parasitological) examination in 402 foxes originating from endemic areas in Switzerland resulted in a sero-prevalence rate of 37%. Sero-prevalence was only 6% and 4% in 54 and 26 other foxes, respectively, originating from Swiss and German areas where E. multilocularis has not yet been reported. Negative control Norwegian (farmed) silver foxes (n = 43) were all sero-negative. The specificity of the Em2-ELISA was confirmed by negative Em2-serologies with sera from dogs infected with intestinal and tissue dwelling helminth species (with the exception of two from 24 dogs infected with E. granulosus).(ABSTRACT TRUNCATED AT 250 WORDS) PMID:1858455

Gottstein, B; Deplazes, P; Eckert, J; Müller, B; Schott, E; Helle, O; Boujon, P; Wolff, K; Wandeler, A; Schwiete, U

1991-05-01

323

Reduction of EMI for oblique incidence of em waves — A case study  

Microsoft Academic Search

Reducti on of Electromagnetic Interference (EM I), i.e., shielding effectiveness of different shields against the angle of incidence with conductors and conductive polymers using plane­ wave theory are carried out. The plane wave shielding effectiveness of new combination of these materials is evaluated as a function of angle of incidence for the single shield. With recent advancements in synthesizing stable

K Brahmananda Reddy; JVS Srikanth Prasad; Ande Srikanth; K Ajit Kishan

2011-01-01

324

Nonorthogonal PEEC formulation for time- and frequency-domain EM and circuit modeling  

Microsoft Academic Search

Electromagnetic solvers based on the partial element equivalent circuit (PEEC) approach have proven to be well suited for the solution of combined circuit and EM problems. The inclusion of all types of Spice circuit elements is possible. Due to this, the approach has been used in many different tools. Most of these solvers have been based on a rectangular or

Albert E. Ruehli; Giulio Antonini; Joris Esch; Jonas Ekman; Anita Mayo; Antonio Orlandi

2003-01-01

325

Data for Environmental Modeling (D4EM): Background and Applications of Data Automation  

EPA Science Inventory

The Data for Environmental Modeling (D4EM) project demonstrates the development of a comprehensive set of open source software tools that overcome obstacles to accessing data needed by automating the process of populating model input data sets with environmental data available fr...

326

KEY AND SUPPLEMENTARY COMPARISONS: RMO comparison final report: 2006-2007 Resistance standards comparison between SIM laboratories. SIM.EM-K1, 1 ? SIM.EM-K2, 1 G? SIM.EM-S6, 1 M?  

NASA Astrophysics Data System (ADS)

The Working Group for Electricity and Magnetism of the Inter-American Metrology System (SIM) initiated the key and supplemental regional comparisons SIM.EM-K1-K2-S6 to provide the first internationally recognized comparisons of precision resistance measurements for nations of the western hemisphere. These comparisons include the official metrology institutes of six members of SIM and follow the guidelines for key comparisons under the 1999 CIPM Mutual Recognition Arrangement (MRA). The National Institute of Standards and Technology (NIST) provided the comparison standards and acted as the pilot laboratory in the SIM.EM-K1-K2-S6 comparisons, which began in January 2006 and were completed in September 2007. By means of procedures for linking key comparison data, the SIM.EM-K1-K2 comparisons will help to provide assurance of equality in measurements between the nations organized in SIM and the participants in the CCEM key comparisons. The analysis included in this report (Appendix A) specifically provides methods for calculating the degrees of equivalence and their uncertainties between the national measurement standards of the participating laboratories (Appendix B). A subsequent analysis (Appendix G) provides methods and results linking this regional comparison to CCEM key comparison CCEM-K2 and a recent BIPM-NIST bilateral comparison at the 1 ? level. Main text. To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/. The final report has been peer-reviewed and approved for publication by the CCEM, according to the provisions of the CIPM Mutual Recognition Arrangement (MRA).

Elmquist, R. E.; Jarrett, D. G.; Zhang, N. F.

2009-01-01

327

Cramer-Rao lower bound optimization of an EM-CCD-based scintillation gamma camera  

NASA Astrophysics Data System (ADS)

Scintillation gamma cameras based on low-noise electron multiplication (EM-)CCDs can reach high spatial resolutions. For further improvement of these gamma cameras, more insight is needed into how various parameters that characterize these devices influence their performance. Here, we use the Cramer-Rao lower bound (CRLB) to investigate the sensitivity of the energy and spatial resolution of an EM-CCD-based gamma camera to several parameters. The gamma camera setup consists of a 3 mm thick CsI(Tl) scintillator optically coupled by a fiber optic plate to the E2V CCD97 EM-CCD. For this setup, the position and energy of incoming gamma photons are determined with a maximum-likelihood detection algorithm. To serve as the basis for the CRLB calculations, accurate models for the depth-dependent scintillation light distribution are derived and combined with a previously validated statistical response model for the EM-CCD. The sensitivity of the lower bounds for energy and spatial resolution to the EM gain and the depth-of-interaction (DOI) are calculated and compared to experimentally obtained values. Furthermore, calculations of the influence of the number of detected optical photons and noise sources in the image area on the energy and spatial resolution are presented. Trends predicted by CRLB calculations agree with experiments, although experimental values for spatial and energy resolution are typically a factor of 1.5 above the calculated lower bounds. Calculations and experiments both show that an intermediate EM gain setting results in the best possible spatial or energy resolution and that the spatial resolution of the gamma camera degrades rapidly as a function of the DOI. Furthermore, calculations suggest that a large improvement in gamma camera performance is achieved by an increase in the number of detected photons or a reduction of noise in the image area. A large noise reduction, as is possible with a new generation of EM-CCD electronics, may improve the energy and spatial resolution by a factor of 1.5.

Korevaar, Marc A. N.; Goorden, Marlies C.; Beekman, Freek J.

2013-04-01

328

Cramer-Rao lower bound optimization of an EM-CCD-based scintillation gamma camera.  

PubMed

Scintillation gamma cameras based on low-noise electron multiplication (EM-)CCDs can reach high spatial resolutions. For further improvement of these gamma cameras, more insight is needed into how various parameters that characterize these devices influence their performance. Here, we use the Cramer-Rao lower bound (CRLB) to investigate the sensitivity of the energy and spatial resolution of an EM-CCD-based gamma camera to several parameters. The gamma camera setup consists of a 3 mm thick CsI(Tl) scintillator optically coupled by a fiber optic plate to the E2V CCD97 EM-CCD. For this setup, the position and energy of incoming gamma photons are determined with a maximum-likelihood detection algorithm. To serve as the basis for the CRLB calculations, accurate models for the depth-dependent scintillation light distribution are derived and combined with a previously validated statistical response model for the EM-CCD. The sensitivity of the lower bounds for energy and spatial resolution to the EM gain and the depth-of-interaction (DOI) are calculated and compared to experimentally obtained values. Furthermore, calculations of the influence of the number of detected optical photons and noise sources in the image area on the energy and spatial resolution are presented. Trends predicted by CRLB calculations agree with experiments, although experimental values for spatial and energy resolution are typically a factor of 1.5 above the calculated lower bounds. Calculations and experiments both show that an intermediate EM gain setting results in the best possible spatial or energy resolution and that the spatial resolution of the gamma camera degrades rapidly as a function of the DOI. Furthermore, calculations suggest that a large improvement in gamma camera performance is achieved by an increase in the number of detected photons or a reduction of noise in the image area. A large noise reduction, as is possible with a new generation of EM-CCD electronics, may improve the energy and spatial resolution by a factor of 1.5. PMID:23552717

Korevaar, Marc A N; Goorden, Marlies C; Beekman, Freek J

2013-04-21

329

Marine EM inversion using unstructured grids and a parallel adaptive finite element method  

NASA Astrophysics Data System (ADS)

Marine electromagnetic (EM) methods are increasingly being used for mapping tectonic structures and offshore resources. While the ability to collect dense 2D profiles and 3D grids of multi-frequency, multi-component data has grown significantly in industry and academia during the past decade, the ability to accurately and efficiently model this data remains a significant computational challenge. To date, most non-linear inversion algorithms applied for marine EM problems have relied on some form of rectangular grids for both the inversion model parameters and the finite-element (FE) or finite-difference discretization of the differential equations; often the same grid is used for both. This work explores the use of unstructured grids for two-dimensional marine EM inversion. Here the inversion minimization is based on the Occam approach but the parameterization is instead defined using arbitrarily shaped polygonal regions. Such a model discretization overcomes many of the shortcomings of rectangular grids. It readily allows for the accurate inclusion of known complex structures (e.g., seafloor bathymetry and seismic surfaces); it also allows for a more efficient model discretization since the parameter density can be concentrated (and refined) only where required. Due to the wide availability of robust triangulation algorithms, constrained conforming Delaunay triangulations are a convenient tool for generating an unstructured model discretization. The forward problem is implemented with a parallel adaptive finite element (FE) method that automatically generates an unstructured triangular FE grid that conforms to the model parameter boundaries. The FE grid is then automatically refined until the FE solution obtains an user specified tolerance. This inversion methodology has been implemented in a single code that handles both the magnetotelluric and controlled-source EM modeling problems. Along with a few synthetic examples that demonstrate the advantages of unstructured grid inversions, this algorithm is applied to a publicly available marine EM data set collected at Hydrate Ridge.

Key, K. W.

2011-12-01

330

The Distance to SN 1999em in NGC 1637 from the Expanding Photosphere Method  

E-print Network

We present 30 optical spectra and 49 photometric epochs sampling the first 517 days after discovery of supernova (SN) 1999em, and derive its distance through the expanding photosphere method (EPM). SN 1999em is shown to be a Type II-plateau (II-P) event, with a photometric plateau lasting until about 100 days after explosion. We identify the dominant ions responsible for most of the absorption features seen in the optical portion of the spectrum during the plateau phase. We find the distance to SN 1999em to be D = 8.2 +/- 0.6 Mpc, with an explosion date of 5.3 +/- 1.4 days before discovery. We examine potential sources of systematic error in EPM-derived distances, and find the most significant to result from uncertainty in the theoretical modeling of the flux distribution emitted by the SN photosphere (i.e., the ``flux dilution factor''). We compare previously derived EPM distances to 5 SNe II in galaxies for which a recently revised Cepheid distance exists from the HST Key Project and find D(Cepheids) / D(EPM) = 0.96 +/- 0.09. Finally, we investigate the possible use of SNe II-P as standard candles and find that for 8 photometrically confirmed SNe II-P with previously derived EPM distances and SN 1999em, the mean plateau absolute brightness is M_V(plateau) = -16.4 +/- 0.6 mag, implying that distances good to ~30% (1-sigma) may be possible without the need for a complete EPM analysis. At M_V(plateau) = -15.9 +/- 0.2 mag, SN 1999em is somewhat fainter than the average SN II-P. The general consistency of absolute SNe II-P brightness during the plateau suggests that the standard candle assumption may allow SNe II-P to be viable cosmological beacons at z > 2.

Douglas C. Leonard; Alexei V. Filippenko; Elinor L. Gates; Weidong Li; Ronald G. Eastman; Aaron J. Barth; Schelte J. Bus; Ryan Chornock; Alison L. Coil; Sabine Frink; Carol A. Grady; Alan W. Harris; Matthew A. Malkan; Thomas Matheson; Andreas Quirrenbach; Richard R. Treffers

2001-09-27

331

Fabrication of carbon films with ? 500nm holes for cryo-EM with a direct detector device.  

PubMed

Single particle electron cryomicroscopy (cryo-EM) is often performed using EM grids coated with a perforated or holey layer of amorphous carbon. Regular arrays of holes enable efficient cryo-EM data collection and several methods for the production of micropatterned holey-carbon film coated grids have been described. However, a new generation of direct detector device (DDD) electron microscope cameras can benefit from hole diameters that are smaller than currently available. Here we extend a previously proposed method involving soft lithography with a poly(dimethylsiloxane) (PDMS) stamp for the production of holey-carbon film coated EM grids. By incorporating electron-beam (e-beam) lithography and modifying the procedure, we are able to produce low-cost high-quality holey-carbon film coated EM grids with ?500nm holes spaced 4?m apart centre-to-centre. We demonstrate that these grids can be used for cryo-EM. Furthermore, we show that by applying image shifts to obtain movies of the carbon regions beside the holes after imaging the holes, the contrast transfer function (CTF) parameters needed for calculation of high-resolution cryo-EM maps with a DDD can be obtained efficiently. PMID:24269484

Marr, Chelsea R; Benlekbir, Samir; Rubinstein, John L

2014-01-01

332

AN?LISE DA INSER??O DOS TEMAS DE HUMANIDADES E ?TICA, COM METODOLOGIA DE APRENDIZAGEM BASEADA EM PROBLEMAS, EM CURRICULO M?DICO INTEGRADO EM ESCOLA P?BLICA NO DISTRITO FEDERAL, BRASIL  

PubMed Central

Objetivo Realizar uma análise da inserção da ética e humanidades no currículo do Curso de Medicina da Escola Superior em Ciências da Saúde - ESCS, escola pública do Distrito Federal, Brasil, de forma a contribuir com o processo de gestão curricular. Metodologia O Estudo é de coorte e documental. Foram pesquisados 37 termos relacionados à ética e 36 referentes à humanização nos objetivos educacionais e conteúdo dos módulos temáticos, habilidades e atitudes e interação ensino-serviço-comunidade, de 1a a 4a série e no programa do internato no currículo (ano 2006) e no projeto pedagógico do Curso de Medicina (2001). Resultados Maior inserção da humanização, ética e bioética na 1a e 2a série, quando comparado à inserção na 3a e 4a série e no internato, (IC95%-?=0,034, pvalue=0,007). Unidade de habilidades e atitudes: freqüência das 3 temáticas no currículo da 1a a 4a séries (IC95%-?=0,026, pvalue=0,013). Quando comparada a inserção entre o internato e as quatro primeiras séries, observa-se que nestas a inserção da temática humanização é superior (IC95%-?=0,042, pvalue=0,029). Conclusão O currículo desenvolvido no ano de 2006 na ESCS apresentou correlação com o projeto pedagógico do curso e contemplou a temática de forma abrangente, em todas as séries e internato. PMID:20396594

Novaes, Maria Rita Carvalho Garbi; Novaes, Luiz Carlos Garcez; Guilhem, Dirce; Lolas, Fernando; Silveira, Carla; Guiotti, Murilo

2009-01-01

333

2009 DOE-EM LONG-TERM MONITORING TECHNICAL FORUM SUMMARY REPORT  

SciTech Connect

The U. S. Department of Energy's (DOE) Office of Environmental Management (EM) has the responsibility for cleaning up 60 sites in 22 states that were associated with the legacy of the nation's nuclear weapons program and other research and development activities. These sites are unique and many of the technologies needed to successfully disposition the associated wastes have yet to be developed or would require significant re-engineering to be adapted for future EM cleanup efforts. In 2008, the DOE-EM Engineering and Technology Program (EM-22) released the Engineering and Technology Roadmap in response to Congressional direction and the need to focus on longer term activities required for the completion of the aforementioned cleanup program. One of the strategic initiatives included in the Roadmap was to enhance long term performance monitoring as defined by 'Develop and deploy cost effective long-term strategies and technologies to monitor closure sites (including soil, groundwater, and surface water) with multiple contaminants (organics, metals and radionuclides) to verify integrated long-term cleanup performance'. To support this long-term monitoring (LTM) strategic initiative, EM 22 and the Savannah River National Laboratory (SRNL) organized and held an interactive symposia, known as the 2009 DOE-EM Long-Term Monitoring Technical Forum, to define and prioritize LTM improvement strategies and products that could be realized within a 3 to 5 year investment time frame. This near-term focus on fundamental research would then be used as a foundation for development of applied programs to improve the closure and long-term performance of EM's legacy waste sites. The Technical Forum was held in Atlanta, GA on February 11-12, 2009, and attended by 57 professionals with a focus on identifying those areas of opportunity that would most effectively advance the transition of the current practices to a more effective strategy for the LTM paradigm. The meeting format encompassed three break-out sessions, which focused on needs and opportunities associated with the following LTM technical areas: (1) Performance Monitoring Tools, (2) Systems, and (3) Information Management. The specific objectives of the Technical Forum were to identify: (1) technical targets for reducing EM costs for life-cycle monitoring; (2) cost-effective approaches and tools to support the transition from active to passive remedies at EM waste sites; and (3) specific goals and objectives associated with the lifecycle monitoring initiatives outlined within the Roadmap. The first Breakout Session on LTM performance measurement tools focused on the integration and improvement of LTM performance measurement and monitoring tools that deal with parameters such as ecosystems, boundary conditions, geophysics, remote sensing, biomarkers, ecological indicators and other types of data used in LTM configurations. Although specific tools were discussed, it was recognized that the Breakout Session could not comprehensively discuss all monitoring technologies in the time provided. Attendees provided key references where other organizations have assessed monitoring tools. Three investment sectors were developed in this Breakout Session. The second Breakout Session was on LTM systems. The focus of this session was to identify new and inventive LTM systems addressing the framework for interactive parameters such as infrastructure, sensors, diagnostic features, field screening tools, state of the art characterization monitoring systems/concepts, and ecosystem approaches to site conditions and evolution. LTM systems consist of the combination of data acquisition and management efforts, data processing and analysis efforts and reporting tools. The objective of the LTM systems workgroup was to provide a vision and path towards novel and innovative LTM systems, which should be able to provide relevant, actionable information on system performance in a cost-effective manner. Two investment sectors were developed in this Breakout Session. The last Breakout Session of the Technical Forum

Mayer, J.

2009-09-30

334

F589 -QUINTA LISTA DE EXERCICIOS 1. Mostre, para um atomo de Thompson, que um eletron que esta em movimento em  

E-print Network

F589 - QUINTA LISTA DE EXERC´ICIOS 1. Mostre, para um ´atomo de Thompson, que um el´etron que est part´icula de 5.30 MeV ´e espalhada por um ^angulo de 60 graus ao passar por uma fina folha met. Mostre que a frequ^encia de rota¸c~ao de um el´etron em um ´atomo no modelo de hidrog^enio de Bohr ´e

de Aguiar, Marcus A. M.

335

[Evaluation of the diagnostic value of the ELISA tests developed by using EgHF, Em2 and EmII/3-10 antigens in the serological diagnosis of alveolar echinococcosis].  

PubMed

Alveolar echinococcosis (AE), caused by larva stage of Echinococcus multilocularis, is one of the lethal parasitic diseases of man and a major public health problem in many countries in the northern hemisphere. When the living conditions and habits in Turkey were considered in terms of relation with the life cycle of the parasite, it was suggested that AE has been much more common than reported mainly from the Eastern Anatolia region of Turkey. Since in vitro serologic diagnosis tests with high specificity for AE have not been used in our country, most of the cases with liver lesions were misdiagnosed by radiological investigations as malignancies. The aim of this study was to evaluate the diagnostic value of the in-house ELISA methods developed by using three different antigens (EgHF, Em2, EmII/3-10) in the serological diagnosis of AE. The study samples included a total of 100 sera provided by Bern University Parasitology Institute where samples were obtained from patients with helminthiasis and all were confirmed by clinical, parasitological and/or histopathological means. Ten samples from each of the cases infected by E.multilocularis, E.granulosus, Taenia solium, Wuchereria bancrofti, Strongyloides stercolaris, Ascaris lumbricoides, Toxocara canis, Trichinella spiralis, Fasciola hepatica and Schistosoma haematobium were studied. In the study, EgHF (E.granulosus hydatid fluid) antigens were prepared in our laboratory from the liver cyst fluids of sheeps with cystic echinococcosis, however Em2 (E.multilocularis metacestode-purified laminated layer) and EmII/3-10 (E.multilocularis recombinant protoscolex tegument) antigens were provided by Bern University Parasitology Institute. Flat bottom ELISA plates were covered with EgHF, Em2 and EmII/3-10 antigens in the concentrations of 2.5 µg, 1 µg and 0.18 µg per well, respectively, and all sera were tested by EgHF-ELISA, Em2-ELISA and EmII/3-10-ELISA methods. For each tests, the samples which were reactive above the cut-off value (mean OD of negative controls+2 SD) were accepted as positive. The sensitivity of the ELISA tests performed with EgHF, Em2 and Em2II/3-10 antigens were estimated as 100%, 90% and 90%, respectively, whereas the specificity were 63%, 91% and 91%, respectively. When Em2-ELISA and EmII/3-10-ELISA tests were evaluated together, the specificity increased to 96%. Our data indicated that the highest sensitivity (100% with EgHF-ELISA) and specificity (96% with Em2-ELISA + EmII/3-10-ELISA) for the serodiagnosis of AE can be achieved by the combined use of the ELISA tests with three different antigens. It was concluded that the early and accurate diagnosis of AE in our country which is endemic for that disease, could be supported by the use of highly specific serological tests such as Em2-ELISA ve EmII/3-10-ELISA contributing radiological data. PMID:25052112

Pekta?, Bayram; Altinta?, Nazmiye; Akpolat, Nezahat; Gottstein, Bruno

2014-07-01

336

"Avaliação clínica do crescimento gengival induzido por ciclosporina-A e tacrolimus em indivíduos transplantados renais: estudo prospectivo".  

E-print Network

??Este estudo teve como objetivos avaliar a ocorrência de crescimento gengival derivado da administração de duas drogas imunossupressoras ciclosporina-A (CsA) e tacrolimus, em indivíduos transplantados… (more)

Ricardo Takiy Sekiguchi

2006-01-01

337

p1 RJM 18/09/13 SE1EM11 Differentiation and Integration Part A Dr Richard Mitchell 2013  

E-print Network

on Blackboard for module SE1EM11 where also a discussion board ask / answer questions here If lose notes, spare ­ In (changing) from CD, Out to Loudspeaker Car ­ driver press accelerator, velocity change gradually Aircraft

Mitchell, Richard

338

Center Publications (Updated April 2009) Kirchner SC and Faustman EM. Identifying mechanisms of developmental toxicity: Application of tools from  

E-print Network

glutathione in methylmercury-induced toxicity in embryonic neuronal cells. Neurotoxicology. 1999: 20(5): 793 RN and Faustman EM. Human variability in mercury toxicokinetics and steady state biomarker ratios

Washington at Seattle, University of

339

Statistical analysis of the influence of forces on particles in EM driven recirculated turbulent flows  

NASA Astrophysics Data System (ADS)

The present paper contains an analysis of the statistical distribution of forces affecting non-conducting particles dispersed in an EM induced recirculated flow in induction furnaces. The simulation is conducted adopting the LES-based Euler-Lagrange approach in the limit of dilute conditions (one-way coupling). It is done by means of a development of OpenFOAM software code. The used Lagrange equation for particle tracking includes drag, EM, buoyancy, lift, acceleration and added mass forces. The relevant approximations for the forces are chosen on the basis of the statistical analysis of the non-dimensional parameters (particle Reynolds number, shear stress and acceleration parameter). The effect of force distribution on particle homogenization is described under different density ratios and particle sizes. The recommendations of the consistence of the Lagrange model for the simulation of the particle motion in the laboratory scale induction crucible furnace are given in conclusion.

Š?epanskis, M.; Jakovi?s, A.; Baake, E.

2011-12-01

340

A fully automated approach to segmentation of irregularly shaped cellular structures in EM images.  

PubMed

While there has been substantial progress in segmenting natural images, state-of-the-art methods that perform well in such tasks unfortunately tend to underperform when confronted with the different challenges posed by electron microscope (EM) data. For example, in EM imagery of neural tissue, numerous cells and subcellular structures appear within a single image, they exhibit irregular shapes that cannot be easily modeled by standard techniques, and confusing textures clutter the background. We propose a fully automated approach that handles these challenges by using sophisticated cues that capture global shape and texture information, and by learning the specific appearance of object boundaries. We demonstrate that our approach significantly outperforms state-of-the-art techniques and closely matches the performance of human annotators. PMID:20879348

Lucchi, Aurélien; Smith, Kevin; Achanta, Radhakrishna; Lepetit, Vincent; Fua, Pascal

2010-01-01

341

Use of the AIC with the EM algorithm: A demonstration of a probability model selection technique  

SciTech Connect

The problem of discriminating between two potential probability models, a Gaussian distribution and a mixture of Gaussian distributions, is considered. The focus of interest is a case where the models are potentially non-nested and the parameters of the mixture model are estimated through the EM algorithm. The AIC, which is frequently used as a criterion for discriminating between non-nested models, is modified to work with the EM algorithm and is shown to provide a model selection tool for this situation. A particular problem involving an infinite mixture distribution known as Middleton`s Class A model is used to demonstrate the effectiveness and limitations of this method. The problem involves a probability model for underwater noise due to distant shipping.

Glosup, J.G.; Axelrod, M.C.

1994-08-12

342

Tapping into Juniorsâ Understanding of E&M: The Colorado Upper-Division Electrostatics (CUE) Diagnostic  

NSDL National Science Digital Library

As part of an effort to systematically improve our junior-level E&M I course, we are developing a tool to assess student learning of E&M concepts at the upper-division. Along with a faculty working group, we established a list of learning goals for the course that, with student observations and interviews, served as a guide in creating the Colorado Upper-Division Electrostatics (CUE) assessment. The result is a 17-question open-ended post-test (with an optional 7-question pre-test) diagnostic, and accompanying grading rubric. We present the preliminary validation of the instrument and rubric, plus results from 226 students in 4 semesters at the University of Colorado, and 4 additional universities.

Chasteen, Stephanie V.; Pollock, Steven J.

2010-01-19

343

3D EM imaging from a single borehole; a numerical feasibility study  

SciTech Connect

Often the drilling of an oil well is followed by a logging process to characterize the region immediately surrounding the well bore. The electromagnetic (EM) induction tool, which provides the formation resistivity, is among the most frequently run logs. A preliminary study has been conducted to analyze the feasibility of three dimensional (3D) electromagnetic (EM) imaging from a single borehole. The logging tool consists of a vertical magnetic dipole source and multiple 3 component magnetic field receivers offset at different distances from the source. Synthetic data calculated with a 3D finite difference code demonstrate that the phase of the horizontal magnetic fields provides the critical information on the three dimensionality of the medium. A 3D inversion algorithm is then employed to demonstrate the plausibility of 3D inversion using 3 component magnetic field data. Finally, problems associated with introducing biased noise into the horizontal components of the field through misalignment of the logging tool is discussed.

Alumbaugh, D.L. [Sandia National Labs., Albuquerque, NM (United States); Wilt, M.J. [ElectroMagnetic Instruments, Inc., Richmond, CA (United States)

1998-07-01

344

REX-ISOLDE RFQ Beam Dynamics Studies using CST EM Studio  

E-print Network

The original CNC milling files used to machine the electrodes of the REX-ISOLDE RFQ were acquired in late 2012 and electrostatic simulations were carried out using CST EM Studio in order to attain a 3D field map of the electric fields in the region around the beam axis. The objective was to construct a beam dynamics simulation tool that frees us from the constraints of the PARMTEQM code, which was used to design the RFQ, and that will afford us more flexibility in the studies needed for pre-bunching into the RFQ with an external multi-harmonic buncher. This note details the geometry of the electrodes and their simulation in CST EM Studio, the implementation of particle tracking in the computed field map using TRACK and benchmarking studies with PARMTEQM v3.09.

Fraser, M A

2014-01-01

345

Helicopter EMS Transport Outcomes Literature: Annotated Review of Articles Published 2007–2011  

PubMed Central

Helicopter EMS (HEMS) and its possible association with outcomes improvement continues to be a subject of discussion. As is the case with other scientific discourse, debate over HEMS usefulness should be framed around an evidence-based assessment of the relevant literature. In an effort to facilitate the academic pursuit of assessment of HEMS utility, in late 2000 the National Association of EMS Physicians' (NAEMSP) Air Medical Task Force prepared annotated bibliographies of the HEMS-related outcomes literature. As a result of that work, two review articles, one covering HEMS use in nontrauma and the other in trauma, published in 2002 in Prehospital Emergency Care surveyed HEMS outcomes-related literature published between 1980 and mid-2000. The project was extended with two subsequent reviews covering the literature through 2006. This review continues the series, outlining outcomes-associated HEMS literature for the three-year period 2007 through the first half of 2011. PMID:22288016

Brown, Brandon S.; Pogue, Korby A.; Williams, Emily; Hatfield, Jesse; Thomas, Matthew; Arthur, Annette; Thomas, Stephen H.

2012-01-01

346

A hybrid learning scheme combining EM and MASMOD algorithms for fuzzy local linearization modeling.  

PubMed

Fuzzy local linearization (FLL) is a useful divide-and-conquer method for coping with complex problems such as modeling unknown nonlinear systems from data for state estimation and control. Based on a probabilistic interpretation of FLL, the paper proposes a hybrid learning scheme for FLL modeling, which uses a modified adaptive spline modeling (MASMOD) algorithm to construct the antecedent parts (membership functions) in the FLL model, and an expectation-maximization (EM) algorithm to parameterize the consequent parts (local linear models). The hybrid method not only has an approximation ability as good as most neuro-fuzzy network models, but also produces a parsimonious network structure (gain from MASMOD) and provides covariance information about the model error (gain from EM) which is valuable in applications such as state estimation and control. Numerical examples on nonlinear time-series analysis and nonlinear trajectory estimation using FLL models are presented to validate the derived algorithm. PMID:18244362

Gan, Q; Harris, C J

2001-01-01

347

Speech Articulator and User Gesture Measurements Using Micropower, Interferometric EM-Sensore  

SciTech Connect

Very low power, GHz frequency, ''radar-like'' sensors can measure a variety of motions produced by a human user of machine interface devices. These data can be obtained ''at a distance'' and can measure ''hidden'' structures. Measurements range from acoustic induced 10-micron amplitude vibrations of vocal tract tissues, to few centimeter human speech articulator motions, to meter-class motions of the head, hands, or entire body. These EM sensors measure ''fringe motions' as reflected EM waves are mixed with a local (homodyne) reference wave. These data, when processed using models of the system being measured, provide real time states of interface positions vs. time. An example is speech articulator positions vs. time in the user's body. This information appears to be useful for a surprisingly wide range of applications ranging from speech coding and recognition, speaker or object identification, noise cancellation, hand or head motions for cursor direction, and other applications.

Holzrichter, J.F.

2000-09-15

348

Speech Articulator and User Gesture Measurements Using Micropower, Interferometric EM-Sensors  

SciTech Connect

Very low power, GHz frequency, ''radar-like'' sensors can measure a variety of motions produced by a human user of machine interface devices. These data can be obtained ''at a distance'' and can measure ''hidden'' structures. Measurements range from acoustic induced, 10-micron amplitude vibrations of vocal tract tissues, to few centimeter human speech articulator motions, to meter-class motions of the head, hands, or entire body. These EM sensors measure ''fringe motions'' as reflected EM waves are mixed with a local (homodyne) reference wave. These data, when processed using models of the system being measured, provide real time states of interface positions or other targets vs. time. An example is speech articulator positions vs. time in the user's body. This information appears to be useful for a surprisingly wide range of applications ranging from speech coding synthesis and recognition, speaker or object identification, noise cancellation, hand or head motions for cursor direction, and other applications.

Holzrichter, J F; Ng, L C

2001-02-06

349

Noise models and cryo-EM drift correction with a direct-electron camera  

PubMed Central

Blurring due to specimen-holder drift is a common occurrence in cryo-EM images. Cameras employing active-pixel sensors are capable of high frame rates such that a single low-dose exposure can be acquired as a series of frames. In this paper we consider the possibility of tracking and compensating for overall drift in typical single-particle specimens through the analysis of frame sequences. A problem that arises in tracking through cross-correlation of frames obtained with the DE-12 camera from Direct Electron LLC is the presence of “hot-pixel noise”. This random pattern of bright pixels is highly correlated among frames. We show how a model of this noise can be employed to greatly reduce its effects. A filter function is derived that optimizes the tracking of image shifts by cross-correlation, and we demonstrate the tracking of specimen drift in typical cryo-EM specimens. PMID:23748163

Shigematsu, H.; Sigworth, F. J.

2013-01-01

350

Integration of CC®, IAQ, and EM for an Optimum and Proactive Energy Performance at Alamo Colleges, San Antonio, Texas.  

E-print Network

1 Integration of CC?, IAQ, and EM for an Optimum and Proactive Energy Performance at Alamo Colleges, San Antonio, Texas. Norma L. Rangel, Stephen O?Neal, and Joseph T. Martinez; Energy Systems Laboratory John W. Strybos Alamo Colleges Energy... Agency of the State of Texas Integration of CC?, IAQ, and EM for an Optimum and Proactive Energy Performance at Alamo Colleges, Texas Outline Alamo?Colleges,?San?Antonio,?TX. Continuous?Commissioning??Measures Indoor?Air?Quality?Efforts Energy...

Rangel, N.; O'Neal, S.; Martinez, J.; Strybos, J.

2012-01-01

351

Propagac ~ao acustica em aguas profundas na presenca de massas d'aguas de mesoescala na costa sudoeste de Portugal  

E-print Network

Propagac¸ ~ao ac´ustica em ´aguas profundas na presenc¸a de massas d'´aguas de mesoescala na costa trabalho baseia-se no estudo da propagac¸ ~ao sonora em ´aguas oce^anicas profundas na costa Portuguesa massa d'´agua de mesosescala. Mostraremos que tal massa d'´agua d´a origem `a um acoplamento entre dois

Jesus, Sérgio M.

352

Spike models for sputtering: Eect of the surface and the material E.M. Bringa a  

E-print Network

of Virginia, Thornton Hall, Charlottesville, VA 22903-2442, USA b Departamento de Fõsica Fundamental y.elsevier.nl/locate/nimb * Corresponding author. Tel.: +1-804-982-2335; fax: +1-804- 924-1353. E-mail addresses: ebringa@virginia.edu (E.M. Bringa), rej@virginia.edu (R.E. Johnson). 0168-583X/00/$ - see front matter � 2000 Elsevier Science B

Johnson, Robert E.

353

List-mode likelihood: EM algorithm and image quality estimation demonstrated on 2-D PET  

Microsoft Academic Search

Using a theory of list-mode maximum-likelihood (ML) source reconstruction presented recently by Barrett et al. (1997), this paper formulates a corresponding expectation-maximization (EM) algorithm, as well as a method for estimating noise properties at the ML estimate. List-mode ML is of interest in cases where the dimensionality of the measurement space impedes a binning of the measurement data. It can

Lucas Parra; Harrison H. Barrett

1998-01-01

354

The microtubule binding drug EM011 inhibits the growth of paediatric low grade gliomas.  

PubMed

Low grade gliomas are a heterogeneous group of tumours representing the most common form of neoplasms in the central nervous system among children. Although gross total resection remains the principal treatment, it is often impractical especially for the resection of tumours within eloquent regions of the brain. Instead Radiotherapy is utilised in such cases, but because of its associated toxicities, it is refrained from use among younger children. These limitations coupled with hypersensitivity and toxicities associated with some commonly used chemotherapeutic agents, have ignited the need to search for safer and more effective treatments for paediatric low grade gliomas. In this study, we investigated the EM011 drug on the growth of two pilocytic and one diffuse paediatric astrocytoma cell lines, using an assortment of cancer assays. We discovered that treatments of low grade gliomas with EM011 abrogated cell viability by inducing a decrease in cell proliferation and an arrest in the S and G2M cell cycle phases, followed by a converse increase in apoptosis in a dose and time dependent manner. The cell migratory and invasion indices, as well as anchorage independent growth in soft agarose, were significantly attenuated. These findings were mechanistically associated with a transient release of AIF, a disruption of microtubule architecture, and a decline in the expression of key genes which drive cancer progression including EGFR, mTORC1, JUN and multiple MMPs. In fact, the activity of MMP2 was also perturbed by EM011. These findings, in conjunction with the insignificant adverse side effects established from other studies, make EM011 an appealing chemotherapeutic agent for the treatment of paediatric low grade gliomas. PMID:23402815

Ajeawung, Norbert F; Joshi, Harish C; Kamnasaran, Deepak

2013-07-10

355

Design, construction and performance of an EMS-based HTS maglev vehicle  

Microsoft Academic Search

A laboratory-scale EMS-based HTS maglev vehicle operating over a 1.5m guideway has been successfully constructed. The fully integrated system consists of a vehicle chassis, four dependent magnetic circuits, four distance sensors, and control and power amplification circuits. As key component of the system, each magnetic circuit includes a U-shape iron core with one HTS coil forming each pole. Eight HTS

Chen Gu; Menglin Liu; Huawei Xing; Tong Zhou; Wensheng Yin; Jun Zong; Zhenghe Han

2005-01-01

356

MODELAGEM DE CHEGADAS EM FILAS GI[X]/M/C/K VIA NCLEO-ESTIMADORES  

E-print Network

MODELAGEM DE CHEGADAS EM FILAS GI[X]/M/C/K VIA N�CLEO-ESTIMADORES F. R. B. Cruz, A. R. Duarte, N. L A incorporação da estimação estatística na análise de filas finitas é uma ideia interessante e promissora como tamanho do sistema. Os resultados são animadores. Palavras-Chave: estatística, sistemas de filas, núcleo

Cruz, Frederico

357

Statistical analysis of the influence of forces on particles in EM driven recirculated turbulent flows  

Microsoft Academic Search

The present paper contains an analysis of the statistical distribution of forces affecting non-conducting particles dispersed in an EM induced recirculated flow in induction furnaces. The simulation is conducted adopting the LES-based Euler-Lagrange approach in the limit of dilute conditions (one-way coupling). It is done by means of a development of OpenFOAM software code. The used Lagrange equation for particle

M Š?epanskis; A Jakovi?s; E Baake

2011-01-01

358

Multi-class brain segmentation using atlas propagation and EM-based refinement  

Microsoft Academic Search

In recent years, multi-atlas segmentation has emerged as one of the most accurate techniques for the segmentation of brain magnetic resonance (MR) images, especially when combined with intensity-based refinement techniques such as graph-cut or expectation-maximization (EM) optimization. However, most of the work so far has focused on intensity-based refinement strategies for individual anatomical structures such as the hippocampus. In this

Christian Ledig; Robin Wolz; Paul Aljabar; Jyrki Lotjonen; Rolf A. Heckemann; Alexander Hammers; Daniel Rueckert

2012-01-01

359

Estudo etnobotânico em duas comunidades rurais (Limeira e Ribeirão Grande) de Guaratuba (Paraná, Brasil)  

Microsoft Academic Search

RESUMO: Realizou-se levantamento etnobotânico em duas comunidades rurais etnicamente distintas (Limeira e Ribeirão Grande) de Guaratuba (Paraná, Brasil) para identificar plantas utilizadas na terapêutica popular, utilizando-se entrevistas semi-estruturadas (n= 11 e n= 7, respectivamente). Além de informações sócio-econômicas sobre a população amostrada, as seguintes informações sobre o uso de plantas medicinais foram registradas: nome popular, indicação terapêutica, parte usada, modo

360

Support Vector Machines in the Machine Learning Classifier for a Texas Hold'em Poker Bot  

Microsoft Academic Search

This design project explores a fascinating application of artificial intelligence and machine learning to one of today's most popular mental challenges: Texas Hold'em poker. Recently, IBM's Deep Blue computer chess program managed to defeat the grandmaster Gary Kasparov utilizing an advanced brute-force search—a method dependent upon chess being a game of deterministic perfect information. This technique cannot be applied to

Jeremy Pfund

361

Noise and Resolution Properties of FB and Ml-Em Reconstructed Spect Images.  

NASA Astrophysics Data System (ADS)

The purpose of this study was to quantify the quality of SPECT images reconstructed using the filtered -backprojection (FB) and maximum likelihood-expectation maximum (ML-EM) algorithms. We did this by investigating what we considered to be the fundamental components of medical image quality-resolution and noise. We studied resolution using the point response function (PRF) in the spatial domain and the modulation transfer function (MTF) in the frequency domain. The noise was investigated in terms of the covariance function (C) in the spatial domain and the noise power spectrum (NPS) in the frequency domain. For linear FB the techniques used to calculate the C and NPS involved a straightforward manipulation of the reconstruction transfer function. For non-linear ML-EM, both analytical and Monte Carlo methods were employed to calculate the noise properties. The method for measuring the PRF for FB reconstructed images was similar to the method for calculating C. To compute the PRF for ML-EM we assumed linearity for low-contrast perturbations. We tested these computational methods during the course of the study. To account for the non-stationarity of SPECT images we defined all of the terms locally. We studied FB as a function of filter cutoff for a Butterworth noise apodization filter and as a function of order for a Metz filter designed to compensate for detector response and scatter. We studied ML-EM as a function of iteration stopping point and as a function of the projector used in the algorithm. The projectors we examine accounted for some or all of the effects of geometric response, scatter, and attenuation. We tested image properties for different diagnostic situations, using three different phantoms. The image property measures were used, in many of these imaging situations, to draw inferences on image quality and to suggest optimal reconstruction algorithms and reconstruction parameters.

Wilson, Donald William

362

Impact of nitrogen reduction measures on the nitrogen loads of the river Ems and Rhine (Germany)  

Microsoft Academic Search

The REGFLUD-project, commissioned by Germany’s Federal Research Ministry (BMBF), addresses the problem of reducing diffuse pollution from agricultural production. The objective of the project is the development and application of multi-criteria scientific methods, which are able to predict diffuse pollution in river basins subject to economic feasibility and social acceptability. The selected river basins (the entire Ems basin and sub-catchments

F. Wendland; H. Bogena; H. Goemann; J. F. Hake; P. Kreins; R. Kunkel

2005-01-01

363

Em 2053 teremos desvendado todos os mistrios do crebro? Conseguiremos conhe-  

E-print Network

dos projetos internacionais que es- tão a ser desenvolvidos em território nacional. Energia solar de cento da energia que ire mos utilizar será solar. Coisas como novos com- bustíveis, dessalinização da absor- ção de energia solar a partir dessa espécie de lupas gigantes que são os concentradores de al

Instituto de Sistemas e Robotica

364

Comportamento da Fundao de um Prottipo de Estrutura de Conteno em Solo Reforado com Geotxtil Notecido  

E-print Network

Comportamento da Fundação de um Protótipo de Estrutura de Contenção em Solo Reforçado com Geotêxtil comportamento de estruturas reforçadas com geotêxtil, foi construído um protótipo de estrutura de contenção, com utilizando a técnica de solo envelopado. Visando garantir um comportamento de deformação plana, a geometria

Zornberg, Jorge G.

365

A generalized EM algorithm for 3-D Bayesian reconstruction from Poisson data using Gibbs priors  

Microsoft Academic Search

A generalized expectation-maximization (GEM) algorithm is developed for Bayesian reconstruction, based on locally correlated Markov random-field priors in the form of Gibbs functions and on the Poisson data model. For the M-step of the algorithm, a form of coordinate gradient ascent is derived. The algorithm reduces to the EM maximum-likelihood algorithm as the Markov random-field prior tends towards a uniform

T. Hebert; R. Leahy

1989-01-01

366

A Memory-Based Approach to Two-Player Texas Hold'em  

Microsoft Academic Search

A Case-Based Reasoning system, nicknamed SARTRE, that uses a memory-based approach to play two-player, limit Texas Hold’em is introduced. SARTRE records hand histories from strong players and attempts to re-use this information to handle novel situations. SARTRE’S case features and their representations are described, followed by the results obtained when challenging a world-class computerised\\u000a opponent. Our experimental methodology attempts to

Jonathan Rubin; Ian Watson

2009-01-01

367

Premissas histórico-socioculturais sobre a família brasileira em função do sexo e da idade  

Microsoft Academic Search

Resumo Segundo a abordagem etnopsicológica, as premissas histórico-socioculturais, que constituem crenças inquestionáveis consensualmente aceitas por um grupo social, desempenham papel chave na compreensão do comportamento individual. Apoiando-se nessa perspectiva, investigou-se a influência do sexo e idade no grau de adesão a premissas sobre a família brasileira. A amostra compreendeu 393 sujeitos de ambos os sexos, distribuídos em quatro faixas etárias,

Eveline Maria Leal Assmar; Maria Cristina Ferreira; Heliane Novaes; Mariana Tomaz

2000-01-01

368

Sector collapse at Kick 'em Jenny submarine volcano (Lesser Antilles): numerical simulation and landslide behaviour  

NASA Astrophysics Data System (ADS)

Kick 'em Jenny volcano is the only known active submarine volcano in the Lesser Antilles. It lies within a horseshoe-shaped structure open to the west northwest, toward the deep Grenada Basin. A detailed bathymetric survey of the basin slope at Kick 'em Jenny and resulting high-resolution digital elevation model allowed the identification of a major submarine landslide deposit. This deposit is thought to result from a single sector collapse event at Kick 'em Jenny and to be linked to the formation of the horseshoe-shaped structure. We estimated the volume and the leading-edge runout of the landslide to be ca. 4.4 km3 and 14 km, respectively. We modelled a sector collapse event of a proto Kick 'em Jenny volcano using VolcFlow, a finite difference code based on depth-integrated mass and momentum equations. Our models show that the landslide can be simulated by either a Coulomb-type rheology with low basal friction angles (5.5°-6.5°) and a significant internal friction angle (above 17.5°) or, with better results, by a Bingham rheology with low Bingham kinematic viscosity (0 < ? B < 30 m2/s) and high shear strength (130 < ? ? 180 m2/s2). The models and the short runout distance suggest that the landslide travelled as a stiff cohesive flow affected by minimal granular disaggregation and slumping on a non-lubricated surface. The main submarine landslide deposit can therefore be considered as a submarine mass slide deposit that behaved like a slump.

Dondin, Frédéric; Lebrun, Jean-Frédéric; Kelfoun, Karim; Fournier, Nicolas; Randrianasolo, Auran

2012-03-01

369

Model Selection Criteria for Missing-Data Problems Using the EM Algorithm  

PubMed Central

We consider novel methods for the computation of model selection criteria in missing-data problems based on the output of the EM algorithm. The methodology is very general and can be applied to numerous situations involving incomplete data within an EM framework, from covariates missing at random in arbitrary regression models to nonignorably missing longitudinal responses and/or covariates. Toward this goal, we develop a class of information criteria for missing-data problems, called ICH,Q, which yields the Akaike information criterion and the Bayesian information criterion as special cases. The computation of ICH,Q requires an analytic approximation to a complicated function, called the H-function, along with output from the EM algorithm used in obtaining maximum likelihood estimates. The approximation to the H-function leads to a large class of information criteria, called ICH?(k),Q. Theoretical properties of ICH?(k),Q, including consistency, are investigated in detail. To eliminate the analytic approximation to the H-function, a computationally simpler approximation to ICH,Q, called ICQ, is proposed, the computation of which depends solely on the Q-function of the EM algorithm. Advantages and disadvantages of ICH?(k),Q and ICQ are discussed and examined in detail in the context of missing-data problems. Extensive simulations are given to demonstrate the methodology and examine the small-sample and large-sample performance of ICH?(k),Q and ICQ in missing-data problems. An AIDS data set also is presented to illustrate the proposed methodology. PMID:19693282

Ibrahim, Joseph G.; Zhu, Hongtu; Tang, Niansheng

2009-01-01

370

Un algorithme EM recursif pour le SLAM Sylvain LE CORFF,Gersende FORT,Eric MOULINES  

E-print Network

Un algorithme EM r´ecursif pour le SLAM Sylvain LE CORFF,Gersende FORT,Eric MOULINES LTCI, TELECOM Simultan´ees (SLAM) lorsque les mod`eles d'´etat et d'observations sont non lin´eaires et non gaussiens contribution `a la r´esolution du SLAM r´eside `a la fois (i) dans la formulation du probl`eme de cartographie

Fort, Gersende

371

Application of Fuzzy Logic to EMS-type Magnetically Levitated Railway Vehicle  

NASA Astrophysics Data System (ADS)

A type of the magnetically levitated railway system with the electro-magnetic suspension system (EMS), which is named HSST system, will be put into revenue service as an urban transport in Nagoya, Japan at the beginning of April 2005. To extend its operational velocity higher than 200km/h for applications in other cities, the design of its EMS system is reexamined for improvement of riding comfort and performances of a train. In order to achieve these objectives, the multipurpose optimization on the basis of the genetic algorithm is applied for the design of EMS-type magnetically levitated vehicle, control parameters of which are optimized both to follow the rail exactly in high-speed and to provide enough riding comfort to passengers. However, the ability to follow sharp irregularities of the rail and to cope with high frequency noises in the gap length control system should be coordinated with riding comfort. The fuzzy logic is introduced into the dynamic control loop and verified to solve the problem. Far better coordination is obtained between the vehicle performances and riding comfort of passengers in high-speed against such various rail conditions. The levitation control with fuzzy logic is shown to be useful for the critical design problem as the high-speed maglev railways.

Kusagawa, Shinichi; Baba, Jumpei; Shutoh, Katsuhiko; Masada, Eisuke

372

Helicopter-borne measurements of sea ice thickness, using a small and lightweight, digital EM system  

NASA Astrophysics Data System (ADS)

Sea ice is an important climate variable and is also an obstacle for marine operations in polar regions. We have developed a small and lightweight, digitally operated frequency-domain electromagnetic-induction (EM) system, a so-called EM bird, dedicated for measurements of sea ice thickness. It is 3.5 m long and weighs only 105 kg, and can therefore easily be shipped to remote places and operated from icebreakers and small helicopters. Here, we describe the technical design of the bird operating at two frequencies of f1 = 3.68 kHz and f2 = 112 kHz, and study its technical performance. On average, noise amounts to ± 8.5 ppm and ± 17.5 ppm for f1 and f2, respectively. Electrical drift amounts to 200 ppm/h and 2000 ppm/h for f1 and f2, during the first 0.5 h of operation. It is reduced by 75% after 2 h. Calibration of the Inphase and Quadrature ppm signals varies by 2 to 3%. A sensitivity study shows that all these signal variations do affect the accuracy of the ice thickness retrieval, but that it remains better than ± 0.1 m over level ice in most cases. This accuracy is also confirmed by means of comparisons of the helicopter EM data with other thickness measurements. The paper also presents the ice thickness retrieval from single-component Inphase data of f1.

Haas, Christian; Lobach, John; Hendricks, Stefan; Rabenstein, Lasse; Pfaffling, Andreas

2009-03-01

373

A GL Double Layer EM Cloaks In Broad Frequency Band And Reciprocal Law  

E-print Network

In this paper, we propose a novel GLWF double layer EM cloak in the broad frequency band. The GLWF double layer cloak consists of two sphere annular layers, two type cloak materials are proposed and installed in its each layer, respectively. The outer layer of the GL cloak has the invisible function in broad frequency band, while its inner layer has the fully absorption and rapid delay function. The GLWF double layer cloak overcomes the following difficulties of the single layer PS cloak. (1) There exists no EM wavefield can be excited inside the concealment of the PS cloak, the concealment of the PS cloak is blind. Our GL double layer cloak recovered that the EM wave field can be excited inside the concealment of the GL double layer cloak. (2) There is exceeding light speed physical violation in PS cloak, its invisibility only in very narrow frequency band. Our GLWF double layer cloak corrects the violation. (3) The reciprocal law is satisfied in our GL double cloak media. However, the PS cloak damaged the r...

Xie, Ganquan; Xie, Lee; Xie, Feng

2010-01-01

374

Direct electron detection yields cryo-EM reconstructions at resolutions beyond 3/4 Nyquist frequency  

PubMed Central

One limitation in electron cryo-microscopy (cryo-EM) is the inability to recover high-resolution signal from the image-recording media at the full-resolution limit of the transmission electron microscope. Direct electron detection using CMOS-based sensors for digitally recording images has the potential to alleviate this shortcoming. Here, we report a practical performance evaluation of a Direct Detection Device (DDD) for biological cryo-EM at two different microscope voltages: 200 and 300 kV. Our DDD images of amorphous and graphitized carbon show strong per-pixel contrast with image resolution near the theoretical sampling limit of the data. Single-particle reconstructions of two frozen-hydrated bacteriophages, P22 and ?15, establish that the DDD is capable of recording usable signal for 3-D reconstructions at about 4/5 of the Nyquist frequency, which is a vast improvement over the performance of conventional imaging media. We anticipate the unparalleled performance of this digital recording device will dramatically benefit cryo-EM for routine tomographic and single-particle structural determination of biological specimens. PMID:22285189

Bammes, Benjamin E.; Rochat, Ryan H.; Jakana, Joanita; Chen, Dong-Hua; Chiu, Wah

2012-01-01

375

Profiling the Local Seebeck Coefficient with Nanometer Resolution Using Scanning Thermoelectric Microscopy (SThEM)  

NASA Astrophysics Data System (ADS)

Thermoelectric (TE) devices offer a method of recovering waste heat through solid state conversion of heat to electricity. Nanostructured thermoelectric materials may provide the key to increased efficiencies, which are sensitive to the Seebeck coefficients (S) However, traditional bulk measurement techniques can only provide a spatially averaged measurement of S over the whole sample, which can hardly investigate the effects of nanostructures on S on the nanoscale. A novel technique known as scanning thermoelectric microscopy (SThEM) has recently been developed to measure induced thermal voltages with nanometer resolution In SThEM, an unheated scanning tunneling microscopy tip acts as a high-resolution voltmeter probe to measure the thermally-induced voltage, V, in a heated sample. Here we present a local S measurement using SThEM across an InGaAs P-N junction. The thermovoltage shows an abrupt change of sign within 10 nanometers, which reveals nanometer spatial resolution. We will discuss local S measurements of AlAs/GaAs superlattices (SLs) with various SL periods and compare the local S with scanning tunneling spectroscopy measurements, which will reveal how local electronic states influence thermoelectric properties.

Lin, Yen-Hsiang; Walrath, Jenna; Goldman, Rachel

2013-03-01

376

Reaching the information limit in cryo-EM of biological macromolecules: experimental aspects.  

PubMed

Although cryo-electron microscopy (cryo-EM) of biological macromolecules has made important advances in the past few years, the level of current technical performance is still well below what the physics of electron scattering would allow. It should be possible, for example, to use cryo-EM to solve protein structures at atomic resolution for particle sizes well below 80 kDa, but currently this has been achieved only for particles at least 10 times larger than that. In this review, we first examine some of the reasons for this large gap in performance. We then give an overview of work that is currently in progress to 1), improve the signal/noise ratio for area detectors; 2), improve the signal transfer between the scattered electrons and the corresponding images; and 3), reduce the extent to which beam-induced movement causes a steep fall-off of signal at high resolution. In each case, there is substantial reason to think that cryo-EM can indeed be made to approach the estimated physical limits. PMID:21575566

Glaeser, Robert M; Hall, Richard J

2011-05-18

377

The Evolution of the EM Distribution in the Core of an Active Region  

E-print Network

We study the spatial distribution and evolution of the slope of the Emission Measure between 1 and 3~MK in the core active region NOAA~11193, first when it appeared near the central meridian and then again when it re-appeared after a solar rotation. We use observations recorded by the Extreme-ultraviolet Imaging Spectrometer (EIS) aboard Hinode, with a new radiometric calibration. We also use observations from the Atmospheric Imaging Assembly (AIA) aboard Solar Dynamics Observatory (SDO). We present the first spatially resolved maps of the EM slope in the 1--3~MK range within the core of the AR using several methods, both approximate and from the Differential Emission Measure (DEM). A significant variation of the slope is found at different spatial locations within the active region. We selected two regions that were not affected too much by any line-of-sight lower temperature emission. We found that the EM had a power law of the form EM~$\\propto T^{b}$, with b = 4.4$\\pm0.4$, and 4.6$\\pm0.4$, during the first...

Del Zanna, Giulio; Mason, Helen; Subramanian, Srividya; O'Dwyer, Brendan

2014-01-01

378

Ribosome structures to near-atomic resolution from thirty thousand cryo-EM particles  

PubMed Central

Although electron cryo-microscopy (cryo-EM) single-particle analysis has become an important tool for structural biology of large and flexible macro-molecular assemblies, the technique has not yet reached its full potential. Besides fundamental limits imposed by radiation damage, poor detectors and beam-induced sample movement have been shown to degrade attainable resolutions. A new generation of direct electron detectors may ameliorate both effects. Apart from exhibiting improved signal-to-noise performance, these cameras are also fast enough to follow particle movements during electron irradiation. Here, we assess the potentials of this technology for cryo-EM structure determination. Using a newly developed statistical movie processing approach to compensate for beam-induced movement, we show that ribosome reconstructions with unprecedented resolutions may be calculated from almost two orders of magnitude fewer particles than used previously. Therefore, this methodology may expand the scope of high-resolution cryo-EM to a broad range of biological specimens. DOI: http://dx.doi.org/10.7554/eLife.00461.001 PMID:23427024

Bai, Xiao-chen; Fernandez, Israel S; McMullan, Greg; Scheres, Sjors HW

2013-01-01

379

Cryo-EM Imaging of DNA-PK DNA Damage Repair Complexes  

SciTech Connect

Exposure to low levels of ionizing radiation causes DNA double-strand breaks (DSBs) that must be repaired for cell survival. Higher eukaryotes respond to DSBs by arresting the cell cycle, presumably to repair the DNA lesions before cell division. In mammalian cells, the nonhomologous end-joining DSB repair pathway is mediated by the 470 kDa DNA-dependent protein kinase catalytic subunit (DNA-PKcs) together with the DNA-binding factors Ku70 and Ku80. Mouse knock-out models of these three proteins are all exquisitely sensitive to low doses of ionizing radiation. In the presence of DNA ends, Ku binds to the DNA and then recruits DNA-PKcs. After formation of the complex, the kinase activity associated with DNA-PKcs becomes activated. This kinase activity has been shown to be essential for repairing DNA DSBs in vivo since expression of a kinase-dead form of DNA-PKcs in a mammalian cell line that lacks DNA-PKcs fails to complement the radiosensitive phenotype. The immense size of DNA-PKcs suggests that it may also serve as a docking site for other DNA repair proteins. Since the assembly of the DNA-PK complex onto DNA is a prerequisite for DSB repair, it is critical to obtain structural information on the complex. Cryo-electron microscopy (cryo-EM) and single particle reconstruction methods provide a powerful way to image large macromolecular assemblies at near atomic (10-15 ?) resolution. We have already used cryo-EM methods to examine the structure of the isolated DNA-PKcs protein. This structure reveals numerous cavities throughout the protein that may allow passage of single or double-stranded DNA. Pseudo two-fold symmetry was found for the monomeric protein, suggesting that DNA-PKcs may interact with two DNA ends or two Ku heterodimers simultaneously. Here we propose to study the structure of the cross-linked DNA-PKcs/Ku/DNA complex. Difference imaging with our published DNA-PKcs structure will enable us to elucidate the architecture of the complex. A second objective is to locate the kinase domain of DNA-PKcs by determining the structure of a kinase deletion mutant both as an isolated protein and as part of a DNA-PKcs/Ku/DNA complex. A third objective is to pursue higher resolution studies of DNA-PKcs and the DNA-PKcs/Ku/DNA complex. If the crystal structure determination of DNA-PKcs is completed during the project period, the atomic coordinates of DNA-PKcs will be modeled within the cryo-EM structure of the complex. In order to achieve these goals, a collaborative effort is proposed between Dr. Phoebe Stewart at UCLA, whose laboratory has expertise in cryo-EM reconstruction methods, and Dr. David Chen at the Lawrence Berkeley National Laboratory, who has a long-standing interest in DNA repair. Advantages of the cryo-EM structural method include the fact that the sample is imaged in a frozen-hydrated and unstained state, avoiding artifacts associated with drying and staining in other EM approaches. Also crystals of the sample are not needed for the single particle reconstruction method and only microgram quantities of sample are required. Cryo-EM structural information of macromolecular assemblies is complementary to both atomic structures of individual component molecules, as well as low resolution information obtained from x-ray and neutron scattering. Knowledge of the geometrical arrangement of the complex, and the position of the essential DNA-PKcs kinase domain, should lead to a greater understanding of the molecular events in DNA double-strand break repair following exposure to low doses of radiation.

Phoebe L. Stewart

2005-06-27

380

Influence of small-scale EM and HM on the growth of large-scale magnetic field  

NASA Astrophysics Data System (ADS)

We investigated the influence of small-scale magnetic energy (EM) and magnetic helicity (HM) on the growth rate (?) of overline{B} field (large-scale magnetic field). HM that plays a key role in magnetohydrodynamic (MHD) dynamo is a topological concept describing the structural properties of magnetic fields. Since EM is a prerequisite of HM, it is not easy to differentiate the intrinsic properties of HM from the influence of EM. However, to understand MHD dynamo, the features of helical and non-helical magnetic field should be made clear. For this, we made a detour: we gave each simulation set its own initial condition (IC, same EM(0) and specific HM(0) at the forced wavenumber kf = 5), and then drove the system with positive helical kinetic energy(kf = 5). According to the simulation results, EM(0), whether or not helical, increases the growth rate of overline{B}. The positive HM(0) boosts the increased growth rate, but the negative HM(0) decreases it. To explain these results, two coupled equations of HM and EM were derived and solved using a simple approximate method. The equations imply that helical magnetic field evolves into the total (helical and non-helical) magnetic field but quenches itself. Non-helical magnetic field also evolves into the total magnetic field but quenches itself. The initially given EM(0) modifies the electromotive force (EMF, < u × b rangle) and generates new terms. The effects of these terms depend on the magnetic diffusivity ?, position of initial conditions kf, and magnetic diffusion time. But the influence disappears exponentially as time passes, so the saturated magnetic fields are eventually independent of the pre-existing initial conditions.

Park, Kiwan

2014-11-01

381

Direct imaging electron microscopy (EM) methods in modern structural biology: Overview and comparison with X-ray crystallography and single-particle cryo-EM reconstruction in the studies of large macromolecules.  

PubMed

Determining the structure of macromolecules is important for understanding their function. The fine structure of large macromolecules is currently studied primarily by X-ray crystallography and single-particle cryo-electron microscopy (EM) reconstruction. Before the development of these techniques, macromolecular structure was often examined by negative-staining, rotary-shadowing and freeze-etching EM, which are categorised here as 'direct imaging EM methods'. In this review, the results are summarised by each of the above techniques and compared with respect to four macromolecules: the ryanodine receptor, cadherin, rhodopsin and the ribosome-translocon complex (RTC). The results of structural analysis of the ryanodine receptor and cadherin are consistent between each technique. The results obtained for rhodopsin vary to some extent within each technique and between the different techniques. Finally, the results for RTC are inconsistent between direct imaging EM and other analytical techniques, especially with respect to the space within RTC, the reasons for which are discussed. Then, the role of direct imaging EM methods in modern structural biology is discussed. Direct imaging methods should support and verify the results obtained by other analytical methods capable of solving three-dimensional molecular architecture, and they should still be used as a primary tool for studying macromolecule structure in vivo. PMID:25040059

Miyaguchi, Katsuyuki

2014-10-01

382

Avaliação do efeito da administração de piridostigmina sobre a variabilidade da frequência cardíaca em pacientes portadores de diabetes mellitus tipo 2 com neuropatia autonômica cardiovascular.  

E-print Network

??Objetivos/Hipótese: A Piridostigmina bloqueia a acetilcolinesterase, promove estimulação colinérgica e aumenta a variabilidade da freqüência cardíaca (VFC) em indivíduos saudáveis e com insuficiência cardíaca. Os… (more)

Ângela d Avila Harthmann

2010-01-01

383

Campus EmErgEnCy InformatIon Texas A&M University LEADS (ListenEducateActDialSeek)  

E-print Network

HonE numBErs polICE/fIrE/mEdICal EmErgEnCy: unIvErsIty polICE non-EmErgEnCy: (979) 845-2345 poIson Control: 1-800-222-1222 Campus-WIdE EmErgEnCy/CodE maroon lIstEn to TV, radio, Website, university e or police emergencies as needed. sEEK help and/or shelter. mEdICal EmErgEnCy Medical emergency If trained

384

Dinâmica populacional de Melanoides tuberculatus (Müller, 1774) em um riacho impactado da Vila do Abraão, Ilha Grande, Angra dos Reis, RJ, Brasil.  

E-print Network

??Melanoides tuberculatus (Müller, 1774) é um gastrópode dulceaquícola de origem afroasiática, atualmente com uma distribuição cosmopolita, devido a seu comportamento invasivo. Utilizamos em nosso trabalho… (more)

Igor Christo Miyahira

2010-01-01

385

Determinação voltamétrica simultânea de paracetamol e cafeína e de ácido ascórbico e cafeína em formulações famacêuticas empregando um eletrodo de diamante dopado com boro.  

E-print Network

??Neste trabalho descreve-se o desenvolvimento de procedimentos eletroanalíticos para a determinação de paracetamol, ácido ascórbico (AA) e cafeína em formulações farmacêuticas utilizando um eletrodo de… (more)

Bruna Cláudia Lourenção

2010-01-01

386

Órteses em PVC para membro superior: utilização por terapeutas ocupacionais brasileiros, propriedades físicomecânicas e de toxicidade e desempenhos funcional e mioelétrico.  

E-print Network

??As órteses são dispositivos que tem como função, estabilizar, imobilizar, prevenir e corrigir deformidades e maximizar a função e atualmente são confeccionadas em termoplásticos, especialmente… (more)

Larissa Galvão da Silva

2013-01-01

387

Detecting leachate plumes and groundwater pollution at Ruseifa municipal landfill utilizing VLF-EM method  

NASA Astrophysics Data System (ADS)

A Very Low Frequency-Electromagnetic (VLF-EM) survey was carried out in two sites of domestic waste of old and recent landfills. The landfill structures lie on a major highly fractured limestone aquifer of shallow groundwater less than 30 m, which is considered as the main source of fresh water in Amman-Zarqa region. A total of 18 VLF-EM profiles were conducted with length ranges between 250 and 1500 m. Hydrochemical and biochemical analysis of water samples, taken from wells in the region, has also been conducted. The integrated results of previous DC resistivity method of the same study area and the outcomes of the 2-D tipper inversion of VLF-EM data proved the efficiency of this method in locating shallow and deep leachate plume with resistivity less than 20 ? m, and enabling the mapping of anomalous bodies and their extensions down to 40 m depth. The sign of groundwater contamination was noticed in many surrounding wells resulting in the high number of fecal coliform bacteria and total coliform bacteria and the increase in inorganic parameters such as chloride (Cl). The pollution of groundwater wells in the landfill area is attributed to the leachate bodies which flow through the upper part of Wadi Es Sir (A7) or Amman-Wadi Es Sir Aquifer (B2/A7). Furthermore, several structural features were detected and the direction of local groundwater movement has been determined. The structural features have been found to have critical effects on the flowing of leachate plume towards north-northeast and west-southwest of the potable aquifer in the area.

Al-Tarazi, E.; Abu Rajab, J.; Al-Naqa, A.; El-Waheidi, M.

2008-09-01

388

Theory and detection scheme of seismic EM signals transferred into the atmosphere from the oceanic and continental lithosphere  

NASA Astrophysics Data System (ADS)

Due to the compound structure of the medium and large portions of energy transferred, a seismic excitation in the oceanic or continental lithosphere disturbs all types of geophysical fields. To investigate the problem of electromagnetic (EM) disturbances in the atmosphere from the seismically activated lithosphere, we have formulated two mathematical models of interaction of fields of different physical nature resulting in arising of the low-frequency (from 0.1 to 10 Hz by amplitude of a few hundreds of pT) EM signals in the atmosphere. First we have considered the EM field generation in the moving oceanic lithosphere and then in the moving continental one. For both cases, the main physical principles and geological data were applied for formulation of the model and characteristics of the computed signals of different nature agree with measurements of other authors. On the basis of the 2D model of the seismo-hydro-EM-temperature interaction in the lithosphere-Ocean-atmosphere domain, a block-scheme of a multisensory vertically distributed (from a seafloor up to the ionosphere) tsunami precursors' detection system is described. On the basis of the 3D model of the seismo-EM interaction in a lithosphere-atmosphere domain, we explain why Prof. Kopytenko (Inst. IZMIRAN of Russian Acad. Sci.) and co-authors were able to estimate location of the future seismic epicenter area from their magnetic field measurements in the atmosphere near the earth's surface.

Novik, Oleg; Ershov, Sergey; Ruzhin, Yuri; Smirnov, Fedor; Volgin, Maxim

2014-07-01

389

Effectiveness of emWave biofeedback in improving heart rate variability reactivity to and recovery from stress.  

PubMed

The current study examined the efficacy of heart rate variability (HRV) biofeedback using emWave, a publicly available biofeedback device, to determine whether training affected physiological tone and stress responses. Twenty-seven individuals aged 18-30 years were randomized to a treatment or no-treatment control group. Treatment participants underwent 4-8 sessions of emWave intervention, and all participants attended pre-treatment and post-treatment assessment sessions during which acute stressors were administered. Physiological data were collected at rest, during stress, and following stress. emWave treatment did not confer changes in tonic measures of HRV or in HRV recovery following stress. However, treatment participants exhibited higher parasympathetic responses (i.e., pNN50) during stress presentations at the post-treatment session than their control counterparts. No treatment effects were evident on self-reported measures of stress, psychological symptoms, or affect. Overall, results from the current study suggest that the emWave may confer some limited treatment effects by increasing HRV during exposure to stress. Additional development and testing of the emWave treatment protocol is necessary before it can be recommended for regular use in clinical settings, including the determination of what physiological changes are clinically meaningful during HRV biofeedback training. PMID:24526291

Whited, Amanda; Larkin, Kevin T; Whited, Matthew

2014-06-01

390

Uses of the EM algorithm in the analysis of data on HIV/AIDS and other infectious diseases.  

PubMed

The analysis of data on infectious diseases is a natural setting for applications of the EM algorithm, because the infection process is only partially observable. Difficulties in determining the expectation at the E step have been side-stepped by adopting pragmatic models which reflect only part of the mechanism that generates the data. In the HIV/AIDS context the EM algorithm has helped in the reconstruction of the unobserved HIV infection curve, the so-called backprojection problem, as well as in the estimation of the distribution for the incubation period until AIDS, in estimating the infectivity of HIV in partnerships and in estimating parameters describing the decline in the immune system. There is a need for smooth estimates of functions in these applications, suggesting the use of the EMS algorithm or use of the EM algorithm to maximize a penalized likelihood. For data on other infectious diseases the application of the EM algorithm has so far been restricted to analyses of data on the size of outbreaks in a sample of households. PMID:9185288

Becker, N G

1997-03-01

391

Traditions & ceremonies in EMS. Passing traditions from one generation to the next.  

PubMed

Traditions and ceremonies don't just happen on their own--they require vision and effort. When honor guard services are required, it is too late to think about getting one organized. Advance preparation and training are necessary if a ceremonial unit is to accomplish its mission in a manner that brings credit to the organization. A wise EMS leader will scan the environment and seek out opportunities to develop the capabilities, nurture traditions and arrange ceremonies that will contribute to organizational morale and support the achievement of the organization's mission. PMID:19719068

Kirkwood, Skip

2009-08-01

392

Use of low power EM radar sensors for speech articulator measurements  

SciTech Connect

Very low power electromagnetic (EM) wave sensors are being used to measure speech articulator motions such as the vocal fold oscillations, jaw, tongue, and the soft palate. Data on vocal fold motions, that correlate well with established laboratory techniques, as well as data on the jaw, tongue, and soft palate are shown. The vocal fold measurements together with a volume air flow model are being used to perform pitch synchronous estimates of the voiced transfer functions using ARMA (autoregressive moving average) techniques. 6 refs., 5 figs.

Holzrichter, J.F.; Burnett, G.C.

1997-05-14

393

SEI: Junior E&M I Course Materials - Electric Fields in Matter  

NSDL National Science Digital Library

This is a collection of resources for teaching electrostatics in matter, including polarization and the electric displacement, constructed over the course of four semesters of a transformed junior-level Electricity and Magnetism course. Included are homework questions, concept tests, student tutorials, lecture notes, and information about common student difficulties in the topic and ways to address these difficulties. This material was developed as part of a education research-based course transformation for junior level E&M. All of the resources developed for this course are available, sorted by individual topic and type, at http://www.compadre.org/psrc/items/Relations.cfm?ID=7891.

Pollock, Steven J.; Chasteen, Stephanie V.

2010-06-29

394

Deciphering the Use and Predictive Value of "EMS Provider Judgment" in Out-of-Hospital Trauma Triage: A Multi-site, Mixed Methods Assessment  

PubMed Central

Background “EMS provider judgment” was recently added as a field triage criterion to the national guidelines, yet its predictive value and real-world application remain unclear. We examine the use and independent predictive value of EMS provider judgment in identifying seriously injured persons. Methods We analyzed a population-based retrospective cohort, supplemented by qualitative analysis, of injured children and adults evaluated and transported by 47 EMS agencies to 94 hospitals in 5 regions across the Western U.S. from 2006–2008. We used logistic regression models to evaluate the independent predictive value of EMS provider judgment for ISS ? 16. EMS narratives were analyzed using qualitative methods to assess and compare common themes for each step in the triage algorithm, plus EMS provider judgment. Results 213,869 injured patients were evaluated and transported by EMS over the 3-year period, of whom 41,191 (19.3%) met at least one of the field triage criteria. EMS provider judgment was the most commonly used triage criterion (40.0% of all triage-positive patients; sole criterion in 21.4%). After accounting for other triage criteria and confounders, the adjusted odds ratio (OR) of ISS ? 16 for EMS provider judgment was 1.23 (95%CI 1.03-1.47), although there was variability in predictive value across sites. Patients meeting EMS provider judgment had concerning clinical presentations qualitatively similar to those meeting mechanistic and other special considerations criteria. Conclusions Among this multi-site cohort of trauma patients, EMS provider judgment was the most commonly used field trauma triage criterion, was independently associated with serious injury and was useful in identifying high risk patients missed by other criteria. However, there was variability in predictive value between sites. PMID:22673250

Newgard, Craig D.; Kampp, Michael; Nelson, Maria; Holmes, James F.; Zive, Dana; Rea, Thomas; Bulger, Eileen M.; Liao, Michael; Sherck, John; Hsia, Renee Y.; Wang, N. Ewen; Fleischman, Ross J.; Barton, Erik D.; Daya, Mohamud; Heineman, John; Kuppermann, Nathan

2012-01-01

395

Orexigenic effects of endomorphin-2 (EM-2) related to decreased CRH gene expression and increased dopamine and norepinephrine activity in the hypothalamus.  

PubMed

Endomorphin-1 (EM-1) and endomorphin-2 (EM-2) are opioid peptides which are selective partial agonists of ?-opioid receptor. We studied the effects of EM-2 injected into the arcuate nucleus (ARC) of the hypothalamus on feeding behavior and gene expression of orexigenic [agouti-related peptide (AgRP), neuropeptide Y (NPY) and orexin-A] and anorexigenic [cocaine and amphetamine-regulated transcript (CART), corticotrophin releasing hormone (CRH) and proopiomelanocortin (POMC)] peptides in male Wistar rats fed a standard laboratory diet. Furthermore, we evaluated the effects of EM-2 on dopamine (DA), norepinephrine (NE) and serotonin (5-hydroxytryptamine, 5-HT) steady state concentrations, in the hypothalamus. 64 rats (16 for each group of treatment) were injected into the ARC, at 9.00 am, with either vehicle or EM-2 (0.50-0.75 ?mol/kg) or EM-2 (0.50 ?mol/kg) plus ?-funaltrexamine (0.20 ?mol/kg). Food intake was recorded through 24h following injection, and hypothalamic DA, NE, 5-HT levels and neuropeptide gene expression were evaluated 24h after EM-2 administration. Compared to vehicle, EM-2 significantly increased food intake, throughout 24h post-injection. Furthermore, EM-2 treatment led to a significant increase of DA and NE concentrations and a decrease of CRH mRNA levels. On the other hand, ?-funaltrexamine administration reverted both feeding stimulatory and neuromodulatory effects induced by EM-2. We can conclude that the orexigenic effect of ?-opioid receptor activation by EM-2 could be related to both inhibition of CRH and stimulation of dopamine and norepinephrine levels, in the hypothalamus. PMID:23916912

Brunetti, Luigi; Ferrante, Claudio; Orlando, Giustino; Recinella, Lucia; Leone, Sheila; Chiavaroli, Annalisa; Di Nisio, Chiara; Shohreh, Rugia; Manippa, Fabio; Ricciuti, Adriana; Mollica, Adriano; Vacca, Michele

2013-10-01

396

I Get By With A Little Help From My Friends: Enhancing PTA Sensitivity to GWs With EM Counterparts  

NASA Astrophysics Data System (ADS)

Gravitational Waves (GWs) are tiny ripples in the fabric of space-time predicted by Einstein’s theory of General Relativity. Pulsar timing arrays (PTAs) offer a unique opportunity to detect low frequency GWs in the near future. Such a detection would be complementary to both LIGO and and future space based GW efforts. In the low (1e-9 - 1e-7 Hz) frequency band, the expected source of GWs is a stochastic background resulting from the ensemble of supermassive black hole binaries (SMBHBs) formed during the merger of galaxies, and possibly a few nearby/massive sources that will be individually resolvable. In this talk we will discuss the interplay between EM and GW observations of SMBMBs and will answer two questions: (i) How will an independent EM observation of an SMBHB increase the GW detection significance with PTAs? and (ii) How will this independent EM observation improve GW parameter estimation with PTAs?

Ellis, Justin; Burke-Spolaor, S.

2014-01-01

397

Degradation of Microcystin-LR and RR by a Stenotrophomonas sp. Strain EMS Isolated from Lake Taihu, China  

PubMed Central

A bacterial strain EMS with the capability of degrading microcystins (MCs) was isolated from Lake Taihu, China. The bacterium was tentatively identified as a Stenotrophomonas sp. The bacterium could completely consume MC-LR and MC-RR within 24 hours at a concentration of 0.7 ?g/mL and 1.7 ?g/mL, respectively. The degradation of MC-LR and MC-RR by EMS occurred preferentially in an alkaline environment. In addition, mlrA gene involved in the degradation of MC-LR and MC-RR was detected in EMS. Due to the limited literature this gene has rare homologues. Sequencing analysis of the translated protein from mlrA suggested that MlrA might be a transmembrane protein, which suggests a possible new protease family having unique function. PMID:20479990

Chen, Jian; Hu, Liang Bin; Zhou, Wei; Yan, Shao Hua; Yang, Jing Dong; Xue, Yan Feng; Shi, Zhi Qi

2010-01-01

398

Estudo espectral em raios-X duros de fontes do tipo Z com o HEXTE/RXTE  

NASA Astrophysics Data System (ADS)

Apresentam-se os resultados de um estudo espectral em raios-X de fontes do tipo Z. As fontes do tipo Z são binárias de raios-X de baixa massa (BXBM) com campo magnético intermediário (B~109G). Esta classe de fontes é composta por apenas 6 fontes Galácticas (a saber: ScoX-1, 9, 7, CygX-2, 5 e 0). A nossa análise se concentra na faixa de raios-X duros (E ~ 20keV), até cerca de 200keV, faixa ótima de operação do telescópio "High Energy X-ray Timing Experiment" (HEXTE), um dos três telescópios de raios-X à bordo do Rossi X-ray Timing Explorer (RXTE). Nossa motivação para tal estudo, uma busca de caudas em raios-X duros em fontes do tipo Z, foi o pouco conhecimento sobre a emissão nesta faixa de energia das referidas fontes quando comparadas, por exemplo, as fontes do tipo atoll (também BXBM). Apresentam-se a análise/redução de dados e explicita-se a maneira como o HEXTE mede o ru1do de fundo. Especial atenção é direcionada a este item devido a localização das fontes do tipo Z e também ao problema de contaminação por fontes próximas. Com exceção de ScoX-1, nenhuma cauda em raios-X duros foi encontrada para as outras fontes, a despeito de resultados de detecção dessas caudas em algumas fontes pelo satélite BeppoSAX. As interpretações deste resultado serão apresentadas. Do ponto de vista deste estudo, nós deduzimos que a produção de caudas de raios-X duros em fontes do tipo Z é um processo disparado quando, pelo menos, uma condição é satisfeita: o brilho da componente térmica do espectro precisa estar acima de um certo valor limiar de ~4´1036ergs-1.

D'Amico, F.; Heindl, W. A.; Rothschild, R. E.

2003-08-01

399

Sensitive and Specific Immunohistochemical Diagnosis of Human Alveolar Echinococcosis with the Monoclonal Antibody Em2G11  

PubMed Central

Background Alveolar echinococcosis (AE) is caused by the metacestode stage of Echinococcus multilocularis. Differential diagnosis with cystic echinococcosis (CE) caused by E. granulosus and AE is challenging. We aimed at improving diagnosis of AE on paraffin sections of infected human tissue by immunohistochemical testing of a specific antibody. Methodology/Principal Findings We have analysed 96 paraffin archived specimens, including 6 cutting needle biopsies and 3 fine needle aspirates, from patients with suspected AE or CE with the monoclonal antibody (mAb) Em2G11 specific for the Em2 antigen of E. multilocularis metacestodes. In human tissue, staining with mAb Em2G11 is highly specific for E. multilocularis metacestodes while no staining is detected in CE lesions. In addition, the antibody detects small particles of E. multilocularis (spems) of less than 1 µm outside the main lesion in necrotic tissue, liver sinusoids and lymphatic tissue most probably caused by shedding of parasitic material. The conventional histological diagnosis based on haematoxylin and eosin and PAS stainings were in accordance with the immunohistological diagnosis using mAb Em2G11 in 90 of 96 samples. In 6 samples conventional subtype diagnosis of echinococcosis had to be adjusted when revised by immunohistology with mAb Em2G11. Conclusions/Significance Immunohistochemistry with the mAb Em2G11 is a new, highly specific and sensitive diagnostic tool for AE. The staining of small particles of E. multilocularis (spems) outside the main lesion including immunocompetent tissue, such as lymph nodes, suggests a systemic effect on the host. PMID:23145198

Tappe, Dennis; Stark, Lorenz; Grüner, Beate; Buttenschoen, Klaus; Hillenbrand, Andreas; Juchems, Markus; Henne-Bruns, Doris; Kern, Petra; Seitz, Hanns M.; Möller, Peter; Rausch, Robert L.; Deplazes, Peter

2012-01-01

400

High-resolution soft x-ray spectrometry using the electron-multiplying charge-coupled device (EM-CCD)  

NASA Astrophysics Data System (ADS)

The Electron-Multiplying Charge-Coupled Device (EM-CCD) shares a similar structure to the CCD except for the inclusion of a gain register that multiplies signal before the addition of read-noise, offering sub-electron effective readnoise at high frame-rates. EM-CCDs were proposed for the dispersive spectrometer on the International X-ray Observatory (IXO) to bring sub-300 eV X-rays above the noise, increasing the science yield. The high-speed, low-noise performance of the EMCCD brought added advantages of reduced dark current and stray-light per frame, reducing cooling and filtering requirements. To increase grating efficiency, several diffracted spectral orders were co-located so the inherent energy resolution of the detector was required for order separation. Although the spectral resolution of the EM-CCD is degraded by the gain process, it was shown that the EM-CCD could achieve the required separation. The RIXS spectrometer at the Advanced Resonant Spectroscopy beamline (ADRESS) of the Swiss Light Source (SLS) at the Paul Scherrer Institute currently uses a CCD, with charge spreading between pixels limiting the spatial resolution to 24 ?m (FWHM). Through improving the spatial resolution below 5 ?m alongside upgrading the grating, a factor of two energy resolution improvement could theoretically be made. With the high-speed, low-noise performance of the EM-CCD, photon-counting modes could allow the use of centroiding techniques to improve the resolution. Using various centroiding techniques, a spatial resolution of 2 ?m (FWHM) has been achieved experimentally, demonstrating the benefits of this detector technology for soft X-ray spectrometry. This paper summarises the use of EM-CCDs from our first investigations for IXO through to our latest developments in ground-based testing for synchrotron-research and looks beyond to future possibilities.

Hall, David J.; Tutt, James H.; Soman, Matthew R.; Holland, Andrew D.; Murray, Neil J.; Schmitt, Bernd; Schmitt, Thorsten

2013-09-01

401

e-VLBI observations of SN2001em - an off-axis GRB candidate  

E-print Network

Studying transient phenomena with the Very Long Baseline Interferometry (VLBI) technique faces severe difficulties because the turnaround time of the experiments from the observations to the scientific result is rather long. The e-VLBI technique has made it possible to transfer the data from a number of European VLBI Network (EVN) telescopes to the central data processor at JIVE through optical fibres, and correlate them in real time. The main goal of this paper is to introduce this rapidly developing new technique, by presenting observational results from a recent experiment. We observed SN2001em, a Type Ib/c supernova with an e-VLBI array and the Multi-Element Radio Linked Interferometer Network (MERLIN) in the UK. The source is marginally detected in our observations. We cannot make definite conclusions whether it is resolved at 1.6 GHz or not. Our data show that SN2001em either started fading in the last couple of months, or its radio spectrum is inverted at low frequencies,indicating free-free or synchrotron self-absorption. This is quite unusual, but not unprecedented in radio SNe.

Z. Paragi; M. A. Garrett; B. Paczynski; C. Kouveliotou; A. Szomoru; C. Reynolds; S. M. Parsley; T. Ghosh

2005-05-23

402

Estimating loop length from CryoEM images at medium resolutions  

PubMed Central

Background De novo protein modeling approaches utilize 3-dimensional (3D) images derived from electron cryomicroscopy (CryoEM) experiments. The skeleton connecting two secondary structures such as ?-helices represent the loop in the 3D image. The accuracy of the skeleton and of the detected secondary structures are critical in De novo modeling. It is important to measure the length along the skeleton accurately since the length can be used as a constraint in modeling the protein. Results We have developed a novel computational geometric approach to derive a simplified curve in order to estimate the loop length along the skeleton. The method was tested using fifty simulated density images of helix-loop-helix segments of atomic structures and eighteen experimentally derived density data from Electron Microscopy Data Bank (EMDB). The test using simulated density maps shows that it is possible to estimate within 0.5Å of the expected length for 48 of the 50 cases. The experiments, involving eighteen experimentally derived CryoEM images, show that twelve cases have error within 2Å. Conclusions The tests using both simulated and experimentally derived images show that it is possible for our proposed method to estimate the loop length along the skeleton if the secondary structure elements, such as ?-helices, can be detected accurately, and there is a continuous skeleton linking the ?-helices. PMID:24565041

2013-01-01

403

Characterization of Antibiotic Peptide Pores Using Cryo-EM and Comparison to Neutron Scattering  

PubMed Central

Abstract Magainin, a 23-residue antibiotic peptide, interacts directly with the lipid bilayer leading to cell lysis in a strongly concentration-dependent fashion. Utilizing cryo-electron microscopy, we have directly observed magainin interacting with synthetic DMPC/DMPG membranes. Visual examination shows that visibly unperturbed vesicles are often found adjacent to vesicles that are lysed or porous, demonstrating that magainin disruption is a highly stochastic process. Quantitatively, power spectra of large numbers of porous vesicles can be averaged together to produce the equivalent of an electron scattering curve, which can be related to theory, simulation, and published neutron scattering experiments. We demonstrate that magainin-induced pores in lipid vesicles have a mean diameter of ?80 Å, compatible with earlier reported results in multilayer stacks. In addition to establishing a connection between experiments in multilayer stacks and vesicles, this also demonstrates that computed power spectra from windowed-out regions of cryo-EM images can be compared to neutron scattering data in a meaningful way, even though the pores of interest cannot yet be individually identified in images. Cryo-EM offers direct imaging of systems in configurations closely related to in vivo conditions, whereas neutron scattering has a greater variety of mechanisms for specific contrast variation via D2O and deuterated lipids. Combined, the two mechanisms support each other, and provide a clearer picture of such ‘soft’ systems than either could provide alone. PMID:19580754

Han, Mikyung; Mei, Yuan; Khant, Htet; Ludtke, Steven J.

2009-01-01

404

Beam-induced motion correction for sub-megadalton cryo-EM particles  

PubMed Central

In electron cryo-microscopy (cryo-EM), the electron beam that is used for imaging also causes the sample to move. This motion blurs the images and limits the resolution attainable by single-particle analysis. In a previous Research article (Bai et al., 2013) we showed that correcting for this motion by processing movies from fast direct-electron detectors allowed structure determination to near-atomic resolution from 35,000 ribosome particles. In this Research advance article, we show that an improved movie processing algorithm is applicable to a much wider range of specimens. The new algorithm estimates straight movement tracks by considering multiple particles that are close to each other in the field of view, and models the fall-off of high-resolution information content by radiation damage in a dose-dependent manner. Application of the new algorithm to four data sets illustrates its potential for significantly improving cryo-EM structures, even for particles that are smaller than 200 kDa. DOI: http://dx.doi.org/10.7554/eLife.03665.001 PMID:25122622

Scheres, Sjors HW

2014-01-01

405

Cryo-EM visualization of an exposed RGD epitope on adenovirus that escapes antibody neutralization.  

PubMed Central

Interaction of the adenovirus penton base protein with alpha v integrins promotes virus entry into host cells. The location of the integrin binding sequence Arg-Gly-Asp (RGD) on human type 2 adenovirus (Ad2) was visualized by cryo-electron microscopy (cryo-EM) and image reconstruction using a mAb (DAV-1) which recognizes a linear epitope, IRGDTFATR. The sites for DAV-1 binding corresponded to the weak density above each of the five 22 A protrusions on the adenovirus penton base protein. Modeling of a Fab fragment crystal structure into the adenovirus-Fab cryo-EM density indicated a large amplitude of motion for the Fab and the RGD epitope. An unexpected finding was that Fab fragments, but not IgG antibody molecules, inhibited adenovirus infection. Steric hindrance from the adenovirus fiber and a few bound IgG molecules, as well as epitope mobility, most likely prevent binding of IgG antibodies to all five RGD sites on the penton base protein within the intact virus. These studies indicate that the structure of the adenovirus particle facilitates interaction with cell integrins, whilst restricting binding of potentially neutralizing antibodies. PMID:9135136

Stewart, P L; Chiu, C Y; Huang, S; Muir, T; Zhao, Y; Chait, B; Mathias, P; Nemerow, G R

1997-01-01

406

An approach to automated acquisition of cryoEM images from lacey carbon grids  

PubMed Central

An approach to automated acquisition of cryoEM image data from lacey carbon grids using the Leginon program is described. Automated liquid nitrogen top up of the specimen holder dewar was used as a step towards full automation, without operator intervention during the course of data collection. During cryoEM studies of actin labelled with myosin V, we have found it necessary to work with lacey grids rather than Quantifoil or C-flat grids due to interaction of myosin V with the support film. Lacey grids have irregular holes of variable shape and size, in contrast to Quantifoil or C-flat grids which have a regular array of similar circular holes on each grid square. Other laboratories also prefer to work with grids with irregular holes for a variety of reasons. Therefore, it was necessary to develop a different strategy from normal Leginon usage for working with lacey grids for targetting holes for image acquisition and suitable areas for focussing prior to image acquisition. This approach was implemented by using the extensible framework provided by Leginon and by developing a new MSI application within that framework which includes a new Leginon node (for a novel method for finding focus targets). PMID:20817100

Nicholson, William V.; White, Howard; Trinick, John

2010-01-01

407

Real-time motion compensation for EM bronchoscope tracking with smooth output - ex-vivo validation  

NASA Astrophysics Data System (ADS)

Navigated bronchoscopy provides benefits for endoscopists and patients, but accurate tracking information is needed. We present a novel real-time approach for bronchoscope tracking combining electromagnetic (EM) tracking, airway segmentation, and a continuous model of output. We augment a previously published approach by including segmentation information in the tracking optimization instead of image similarity. Thus, the new approach is feasible in real-time. Since the true bronchoscope trajectory is continuous, the output is modeled using splines and the control points are optimized with respect to displacement from EM tracking measurements and spatial relation to segmented airways. Accuracy of the proposed method and its components is evaluated on a ventilated porcine ex-vivo lung with respect to ground truth data acquired from a human expert. We demonstrate the robustness of the output of the proposed method against added artificial noise in the input data. Smoothness in terms of inter-frame distance is shown to remain below 2 mm, even when up to 5 mm of Gaussian noise are added to the input. The approach is shown to be easily extensible to include other measures like image similarity.

Reichl, Tobias; Gergel, Ingmar; Menzel, Manuela; Hautmann, Hubert; Wegner, Ingmar; Meinzer, Hans-Peter; Navab, Nassir

2012-02-01

408

A reciprocity formulation for the EM scattering by an obstacle within a large open cavity  

NASA Technical Reports Server (NTRS)

A formulation based on a generalized reciprocity theorem is developed for analyzing the external high frequency EM scattering by a complex obstacle inside a relatively arbitrary open-ended waveguide cavity when it is illuminated by an external source. This formulation is also extended to include EM fields whose time dependence may be nonperiodic. A significant advantage of this formulation is that it allows one to break up the analysis into two independent parts; one deals with the waveguide cavity shape alone and the other with the obstacle alone. The external scattered field produced by the obstacle (in the presence of the waveguide cavity structure) is given in terms of a generalized reciprocity integral over a surface S(T) corresponding to the interior waveguide cavity cross section located conveniently but sufficiently close to the obstacle. Furthermore, the fields coupled into the cavity from the source in the exterior region generally need to propagate only one-way via the open front end (which is directly illuminated) to the interior surface S(T) in this approach, and not back, in order to find the external field scattered by the obstacle.

Pathak, Prabhakar H.; Burkholder, Robert J.

1993-01-01

409

EMXtalOrg: an EM tilt data organization and processing system.  

PubMed

The EMXtalOrg software package organizes and processes electron microscope (EM) data from indexed images of tilted two-dimensional (2D) protein crystals. The package, which is freely available, was written to facilitate the processing of amplitude and phase (aph) data from 2D EM projections into three-dimensional (3D) reconstructions. The suite takes as input contrast transfer function corrected aph files and generates lattice line data to yield HKL files which can be output for viewing 3D structures with existing data visualization programs. Additionally, the package offers a number of other processing features, and provides a convenient graphical interface for several image processing programs devoted to the analysis of 2D crystals. The package is written in the Python scripting language using the Tcl/ Tk toolkit for the graphical user interface, making it portable and easy to modify by the user. The package provides an integrated environment to simplify the process of obtaining 3D structures from 2D crystals. PMID:12380647

McDermott, Jason; Barklis, Eric

2002-10-01

410

Uma comparação entre técnicas de propagação de erros em astrofísica: Monte Carlo x Bootstrap  

NASA Astrophysics Data System (ADS)

Recentemente Dhillon & Watson (2001) criticaram o procedimento de determinação de erros via simulações de Monte Carlo no caso do imageamento indireto de estrelas, por introduzir ruído nos dados e resultar em erros superestimados. Estes autores propuseram a utilização alternativa do método de Bootstrap como uma técnica superior para a estimativa de erros. Neste trabalho apresentamos os resultados de um estudo comparativo da performance das técnicas de simulação por Monte Carlo e por Bootstrap para a determinação de erros em duas situações de interesse: (i) ajuste de modelos a espectros observados e (ii) imageamento indireto de discos de acréscimo com técnicas de mapeamento por eclipse. No caso (i), os dados de entrada são espectros de emissão simples de hidrogênio aos quais é adicionado ruído gaussiano de amplitude selecionada. No caso (ii), são produzidas curvas de luz do eclipse de uma distribuição de brilho seguindo a lei TµR-3/4 para discos estacionários cuja taxa de acréscimo varia ao longo do eclipse segundo uma distribuição gaussiana de amplitude selecionada, simulando o ruído. A avaliação da performance é feita com o auxílio de um diagrama do erro relativo na grandeza ajustada, conforme obtido por cada método, versus o erro relativo (ruído/sinal) dos dados de entrada. O estudo mostra que as duas técnicas produzem resultados semelhantes nos dois casos, e que a suposta superioridade do método de Bootstrap não se confirma.

Waelkens, A. H.; Janot Pacheco, E.

2003-08-01

411

3D anisotropic modeling for airborne EM systems using finite-difference method  

NASA Astrophysics Data System (ADS)

Most current airborne EM data interpretations assume an isotropic model, which is sometimes inappropriate, especially in regions with distinct dipping anisotropy due to strong layering and stratifications. In this paper, we investigate airborne EM modeling and interpretation for a 3D earth with arbitrarily electrical anisotropy. We implement the staggered finite-difference algorithm to solve the coupled partial differential equations for the scattered electrical fields. Whereas the current density that is connected to the diagonal elements of the anisotropic conductivity tensor is discretized by using the volume weighted average, the current density that is connected to the non-diagonal elements is discretized by using the volume current density average. Further, we apply a divergence correction technique designed specifically for 3D anisotropic models to speed up the modeling process. For numerical experiments, we take both VMD and HMD transmitting dipoles for two typical anisotropic cases: 1) anisotropic anomalous inhomogeneities embedded in an isotropic half-space; and 2) isotropic anomalous inhomogeneities embedded in an anisotropic host rock. Model experiments show that our algorithm has high calculation accuracy, the divergence correction technique used in the modeling can greatly improve the convergence of the solutions, accelerating the calculation speed up to 2 times for the model presented in the paper. The characteristics inside the anisotropic earth, like the location of the anomalous body and the principal axis orientations, can also be clearly identified from AEM area surveys.

Liu, Yunhe; Yin, Changchun

2014-10-01

412

STATegra EMS: an Experiment Management System for complex next-generation omics experiments  

PubMed Central

High-throughput sequencing assays are now routinely used to study different aspects of genome organization. As decreasing costs and widespread availability of sequencing enable more laboratories to use sequencing assays in their research projects, the number of samples and replicates in these experiments can quickly grow to several dozens of samples and thus require standardized annotation, storage and management of preprocessing steps. As a part of the STATegra project, we have developed an Experiment Management System (EMS) for high throughput omics data that supports different types of sequencing-based assays such as RNA-seq, ChIP-seq, Methyl-seq, etc, as well as proteomics and metabolomics data. The STATegra EMS provides metadata annotation of experimental design, samples and processing pipelines, as well as storage of different types of data files, from raw data to ready-to-use measurements. The system has been developed to provide research laboratories with a freely-available, integrated system that offers a simple and effective way for experiment annotation and tracking of analysis procedures. PMID:25033091

2014-01-01

413

Paleobiological Applications of Focused Ion Beam Electron Microscopy (FIB-EM): An Ultrastructural Approach to the (Micro)Fossil Record  

Microsoft Academic Search

\\u000a Coupled dual-beam focused ion beam electron microscopy (FIB-EM) has gained popularity across multiple disciplines over the\\u000a past decade. Widely utilized as a stand-alone instrument for micromachining and metal- or insulator-deposition in numerous\\u000a industries, the sub-?m-scale ion milling and integrated electron imaging capabilities of such FIB-based systems are well documented\\u000a in the materials science literature. These capacities make FIB-EM a powerful

James D. Schiffbauer; Shuhai Xiao

414

In 2004, the Laboratory made great progress under its environmental management program. BNL's Environmental Management System (EMS) is the Laboratory's commitment to environmentally responsible  

E-print Network

's Environmental Management System (EMS) is the Laboratory's commitment to environmentally responsible operationsIn 2004, the Laboratory made great progress under its environmental management program. BNL. The cornerstone of an EMS is a Laboratory Environmental Stewardship Policy. In 2004, BNL incorporated

415

ALTERAÇÕES DA FASE ORAL DA DEGLUTIÇÃO EM CRIANÇAS COM PARALISIA CEREBRAL Changes in the oral phase of swallowing in children with cerebral palsy  

Microsoft Academic Search

RESUMO Objetivos: Verificar as alterações na fase oral da deglutição em crianças com paralisia cerebral. Método: Foi conduzido um estudo quantitativo, observacional e transversal, desenvolvido no período de junho a agosto de 2006 no NAMI - Núcleo de Atenção Médica Integrada, em Fortaleza-CE. A amostra constituiu-se de 20 crianças na faixa etária de 1 ano e 6 meses a 8

Karise Santos Vasconcelos

2008-01-01

416

Motivation and model Gibbs sampler and EM setup Results for simulated and real data Challenges with Gibbs sampler Accounting for missing lines in atomic  

E-print Network

Motivation and model Gibbs sampler and EM setup Results for simulated and real data Challenges University 1 Dec, 2009 #12;Motivation and model Gibbs sampler and EM setup Results for simulated and real to identify lines that were omitted in the atomic emission table. #12;Motivation and model Gibbs sampler

Wolfe, Patrick J.

417

Georeferencing natural disaster impact footprints : lessons learned from the EM-DAT experience  

NASA Astrophysics Data System (ADS)

The Emergency Events Database (EM-DAT) contains data about the occurrence and consequences of all the disasters that have taken place since 1900. The main objectives of the database are to serve the purposes of humanitarian action at national and international levels; to aid decision making for disaster preparedness, as well as providing an objective base for vulnerability assessments and priority setting. EM-DAT records data on the human and economic impacts for each event as well as the location of said event. This is recorded as text data, namely the province, department, county, district, or village. The first purpose of geocoding (or georeferencing) the EM-DAT database is to transform the location data from text format into code data. The GAUL (Global Administrative Unit Layers) database (FAO) is used as a basis to identify the geographic footprint of the disaster, ideally to the second administrative level and add a unique code for each affected unit. Our first step has involved georeferencing earthquakes since the location of these is precise. The second purpose is to detail the degree of precision of georeferencing. The application and benefits of georeferencing are manifold. The geographic information of the footprint of past (after 2000) and future natural disasters permits the location of vulnerable areas with a GIS system and to cross data from different sources. It will allow the study of different elements such as the extent of a disaster and its human and economic consequences; the exposure and vulnerability of the population in space and time and the efficiency of mitigation measures. In addition, any association between events and external factors can be identified (e.g.: is the famine located at the same places as drought?) and precision of the information in the disaster report can be evaluated. Besides this, these maps will provide valuable communication support since maps have a high communication power and are easily understandable by the wider public and policy makers. Some results from the application of georeferencing will be presented during the session such as a study of the population potentially exposed and affected by natural disasters in Europe, a flood vulnerability analysis in Vietnam and the potential merging of watersheds analysis and flood footprints data.

Wallemacq, Pascaline; Guha Sapir, Debarati

2014-05-01

418

Ansiedade, dor e desconforto relacionado à saúde bucal em crianças menores de 5 anos Anxiety, pain and discomfort related to oral health in children under the age of five years  

Microsoft Academic Search

Key-words Essa pesquisa teve como objetivo avaliar a ansiedade, dor e\\/ ou desconforto associado à saúde bucal em crianças menores de 5 anos. Participaram deste estudo piloto 83 crianças, de ambos os sexos, matriculadas em uma creche municipal, no bairro de Santo Amaro, Recife. A coleta de dados foi realizada através da aplicação de um questionário em forma de entrevista

Michelle Marie; Tiné Oliveira; Viviane Colares; Amanda Campioni

419

Levantamento das necessidades odontológicas em crianças de 12 anos da zona urbana do município de Verdejante-PE Survey of the odontológicas necessities in children of 12 years of the urban zone of the Verdejante-PE  

Microsoft Academic Search

Key-words Os agravos à saúde bucal têm sido estudados em escolares, sendo a cárie um dos principais problemas encontrados. No entanto, as desordens bucais não se resumem a essa doença, pois as más-oclusões e os problemas periodontais também acometem crianças em idade escolar. O objetivo desse trabalho foi realizar um levantamento das necessidades odontológicas em crianças de 12 anos da

Márcia Maria; Vendiciano Barbosa Vasconcelos

2008-01-01

420

Development of Grounded Electrical Source Airborne Transient EM (GREATEM) Survey System and Its Application to Investigating a Volcano Structure  

Microsoft Academic Search

We have developed an airborne EM system that uses a grounded electrical source and an airborne magnetic field receiver to increase the depth of investigation. Using a grounded source, we can apply a large source moment with a long transmitter-receiver distance, thus we expect to obtain a greater depth of investigation. However, the area of survey is limited with this

T. Mogi; A. Jomori; N. Jomori; Y. Azuma; E. Y. Fomenko

2005-01-01

421

Optimal design and FEM analysis of the superconducting magnets of EMS-MAGLEV models using Bi2223 tapes  

Microsoft Academic Search

The focus of our research is to explore the possibility for designing and fabricating a new electromagnetic suspension (EMS-MAGLEV) model with high temperature superconductors (HTS). The magnets of our model were designed to possess 250-kg vertical suspension force. The cross sectional shapes and the configurations of HTS magnets were analyzed with FEM and evolution strategies. The design variables are the

Guoqiang Zhang; Youtong Fang; Fuchuan Song; Guiping Zhu; Zanji Wang

2004-01-01

422

Writing Position Vectors in 3-d Space: A Student Difficulty With Spherical Unit Vectors in Intermediate E&M  

Microsoft Academic Search

An intermediate E&M course (i.e. based on Griffiths [1]) involves the extensive integration of vector calculus concepts and notation with abstract physics concepts like field and potential. We hope that students take what they have learned in their math courses and apply it to help represent and make sense of the physics. To assess how well students are able to

Brant E. Hinrichs

2010-01-01

423

Relações solo-geoambiente em áreas de ocorrências de Ipucas na planície do Médio Araguaia - Estado de Tocantins  

Microsoft Academic Search

RESUMO - Dentre as paisagens do médio rio Araguaia, destacam-se as extensas planícies e depressões sazonalmente alagadas. Nelas se inserem formações florestais higrófilas denominadas Ipucas, como enclaves peculiares pela sua fitossociologia e ambiente pedogeomorfológico. Esses fragmentos florestais naturais ocorrem na planície fluvial, em região de ecótono entre o Cerrado e a Floresta Amazônica. Neste estudo, foi selecionada uma área de

Alan Kardec Elias Martins; Carlos Ernesto G. R. Schaefer; Elias Silva; Vicente Paulo Soares; Guilherme Resende Corrêa; Bruno Araújo Furtado de Mendonça

2006-01-01

424

Body Size in Relation to Urinary Estrogens and Estrogen Metabolites (EM) among Premenopausal Women during the Luteal Phase  

PubMed Central

Estrogen metabolism profiles may play an important role in the relationship between body size and breast carcinogenesis. Previously, we observed inverse associations between current body mass index (BMI) and plasma levels of parent estrogens (estrone and estradiol) among premenopausal women during both follicular and luteal phases. Using data from the Nurses’ Health Study II (NHS II), we assessed whether height, current BMI, and BMI at age 18 were associated with the urinary concentrations of 15 estrogens and estrogen metabolites (jointly referred to as EM) measured during the luteal phase among 603 premenopausal women. We observed inverse associations with total EM for height (Ptrend=0.01) and current BMI (Ptrend=0.01), but not BMI at age 18 (Ptrend=0.26). Six EMs were 18–27% lower in women with a height 68+ inches versus ?62 inches, primarily in the methylated catechol pathway (Ptrend=0.04). Eight EMs were 18–50% lower in women with a BMI of 30+ versus <20, primarily in the 2-catechol and methylated catechol pathways (Ptrend<0.001 for both). Our results suggest that height and current BMI are associated with estrogen metabolism profiles in premenopausal women. Further studies with timed urine and blood collections are required to confirm and extend our findings. PMID:23011724

Xie, Jing; Eliassen, A. Heather; Xu, Xia; Matthews, Charles E.; Hankinson, Susan E.; Ziegler, Regina G.; Tworoger, Shelley S.

2012-01-01

425

Influence of small scale $E_M$ and $H_M$ on the growth of large scale magnetic field  

E-print Network

We investigated the influence of small scale magnetic energy ($E_M$) and magnetic helicity ($H_M$) on the growth rate ($\\gamma$) of large scale magnetic field ($\\overline{{\\bf B}}$). $H_M$ that plays a key role in MHD dynamo is a topological concept describing the structural properties of magnetic fields. So, it is not possible to differentiate the intrinsic properties of $H_M$ from the influence of $E_M$, and vice versa. However, to understand MHD dynamo the features of helical and nonhelical magnetic field should be made clear. For this, we made a detour: we gave each simulation set its own initial condition ($IC$, same $E_M$(0) and specific $H_M$(0) at $k_f=5$), and then drove the system with positive helical kinetic energy($k_f=5$). According to the simulation results, $E_M$(0), whether or not helical, increases the growth rate of $\\overline{{\\bf B}}$. The positive $H_M$(0) boosts the increased growth rate, but the negative $H_M$(0) decreases it. To explain these results two coupled equations of $H_M$ and...

Park, Kiwan

2014-01-01

426

Need a University Adopt a Formal Environmental Management System?: Progress without an EMS at a Small University  

ERIC Educational Resources Information Center

What system does a university need to optimise its progress to sustainability? Discusses the gradation of approaches possible for a university as it strives to improve its environmental performance. Argues that an environmental policy plus mechanisms for its implementation can be adequate, and endorsement of a single formal EMS need not be…

Spellerberg, Ian F.; Buchan, Graeme D.; Englefield, Russell

2004-01-01

427

ANALISE COMPARATIVA ENTRE MICROSOFT FLIGHT SIMULATOR E FLIGHTGEAR FLIGHT SIMULATOR EM TESTES HARDWARE-IN-THE-LOOP  

E-print Network

testes HWIL estende-se `as diversas ´areas de pesquisa, auxiliando a minimi- zar o tempo e os custosAN´ALISE COMPARATIVA ENTRE MICROSOFT FLIGHT SIMULATOR E FLIGHTGEAR FLIGHT SIMULATOR EM TESTES, HWIL systems, UAVs, simulation. Resumo-- Neste artigo ´e estabelecida uma rela¸c~ao comparativa entre

Chaimowicz, Luiz

428

Modelo de fila hipercubo com múltiplo despacho e backup parcial para análise de sistemas de atendimento médico emergenciais em rodovias  

Microsoft Academic Search

The hypercube is a spatially distributed queuing model based on Markovian analysis approximations to analyze the configuration and operation of server-to-customer emergency systems, in which servers travel to the locations of the customers. In the present study we adapt the model to analyze emergency medical systems (EMS) on highways operating with particular dispatching policies, which considers that only certain ambulances

Ana Paula Iannoni; Reinaldo Morabito

2006-01-01

429

The dynamic dielectric at a brain functional site and an em wave approach to functional brain imaging.  

PubMed

Functional brain imaging has tremendous applications. The existing methods for functional brain imaging include functional Magnetic Resonant Imaging (fMRI), scalp electroencephalography (EEG), implanted EEG, magnetoencephalography (MEG) and Positron Emission Tomography (PET), which have been widely and successfully applied to various brain imaging studies. To develop a new method for functional brain imaging, here we show that the dielectric at a brain functional site has a dynamic nature, varying with local neuronal activation as the permittivity of the dielectric varies with the ion concentration of the extracellular fluid surrounding neurons in activation. Therefore, the neuronal activation can be sensed by a radiofrequency (RF) electromagnetic (EM) wave propagating through the site as the phase change of the EM wave varies with the permittivity. Such a dynamic nature of the dielectric at a brain functional site provides the basis for an RF EM wave approach to detecting and imaging neuronal activation at brain functional sites, leading to an RF EM wave approach to functional brain imaging. PMID:25367217

Li, X P; Xia, Q; Qu, D; Wu, T C; Yang, D G; Hao, W D; Jiang, X; Li, X M

2014-01-01

430

The Dynamic Dielectric at a Brain Functional Site and an EM Wave Approach to Functional Brain Imaging  

PubMed Central

Functional brain imaging has tremendous applications. The existing methods for functional brain imaging include functional Magnetic Resonant Imaging (fMRI), scalp electroencephalography (EEG), implanted EEG, magnetoencephalography (MEG) and Positron Emission Tomography (PET), which have been widely and successfully applied to various brain imaging studies. To develop a new method for functional brain imaging, here we show that the dielectric at a brain functional site has a dynamic nature, varying with local neuronal activation as the permittivity of the dielectric varies with the ion concentration of the extracellular fluid surrounding neurons in activation. Therefore, the neuronal activation can be sensed by a radiofrequency (RF) electromagnetic (EM) wave propagating through the site as the phase change of the EM wave varies with the permittivity. Such a dynamic nature of the dielectric at a brain functional site provides the basis for an RF EM wave approach to detecting and imaging neuronal activation at brain functional sites, leading to an RF EM wave approach to functional brain imaging. PMID:25367217

Li, X. P.; Xia, Q.; Qu, D.; Wu, T. C.; Yang, D. G.; Hao, W. D.; Jiang, X.; Li, X. M.

2014-01-01

431

Transforming the junior level: Outcomes from instruction and research in E&M Stephanie V. Chasteen,1  

E-print Network

of Integrative Biology and Department of Civil and Environmental Engineering, University of California, Berkeley--junior-level electricity and magnetism. With the aim of educating our majors based on a more complete understanding the teaching of electricity and magnetism (E&M) at the intro- ductory level in some detail [3,4], research

Koehl, Mimi

432

Motion compensation in histogram-mode and list-mode EM reconstructions: beyond the event-driven approach  

Microsoft Academic Search

With continuous improvements in spatial resolution of positron emission tomography (PET) scanners, small patient movements during PET imaging become a significant source of resolution degradation. This work explores incorporation of motion information into expectation-maximization (EM) reconstruction algorithms. An important issue addressed is the existence of lines-of-response (LORs) corresponding to no actual pairs of detectors and their motion-induced \\

Arman Rahmim; Peter Bloomfield; Sylvain Houle; Mark Lenox; Christian Michel; Kenneth R. Buckley; Thomas J. Ruth; Vesna Sossi

2004-01-01

433

NCMIR METHODS FOR 3D EM: A NEW PROTOCOL FOR PREPARATION OF BIOLOGICAL SPECIMENS FOR SERIAL BLOCK  

E-print Network

including: ferrocyanide reduced osmium tetroxide post- fixation, thiocarbohydrazide-osmium liganding (OTO osmium tetroxide (EMS). The tissues are incubated in this solution for 1 hour, on ice. 6) While the initial osmium incubation (step 5 above) is occurring prepare the following thiocarbohydrazide (TCH

Gleeson, Joseph G.

434

Vigabarina no tratamento da epilepsia de difícil controle em pacientes com síndrome de West e esclerose tuberosa  

Microsoft Academic Search

RESUMO - Objetivo é relatar a eficácia da vigabatrina no controle das convulsões, bem como as alterações eletrencefalográficas em crianças com esclerose tuberosa e síndrome de West. Método: Estudo retrospectivo, com dados clínicos, de neuroimagem e de eletrencefalograma. Resultados: Sete pacientes foram acompanhados e o tempo médio de seguimento foi 10 anos. Dos pacientes, quatro eram do sexo feminino e

Newra Tellechea Rotta; Alexandre Rodrigues da Silva; Lygia Ohlweiler; Rudimar Riesgo

2003-01-01

435

Workshop: Mtodos Avanados de Sensoriamento Remoto para Aplicaes em Solos (Advanced Remote Sensing Methods for Soil Applications)  

E-print Network

para o mapeamento global de solos em escala continental e dados de radar (Ground Penetrating Radar, and local to regional radar applications based on Ground Penetrating Radar data. Examples will be presented techniques applied at all scales from ground-based instruments to remote sensing scale for soil geochemical

436

Implementation of a direct install 3-pole type EM transducer in round window niche for implantable middle ear hearing aids.  

PubMed

Since the 1980's, various types of implantable hearing aids using unique means for delivering acoustic power to the inner ear have been developed. Recently, implantable hearing aids that stimulate the round window by the middle ear transducer have received great attention because it reduces loading effect at the ossicular chain. In this study, we have implemented a direct install 3-pole type EM transducer in round window niche for implantable middle ear hearing aid. The 3-pole type EM transducer consists of two permanent magnets and three coils and exhibit structural features that minimize leakage flux, thereby permitting high efficiency and low magnetic field interference. The stapes velocity was measured using a laser Doppler vibrometer in response to the round window stimulation from the transducer. To verify the usefulness of the 3-pole type EM transducer, we compared the stapes vibration characteristics produced by the transducer and those from a sound source. The magnitude of stapes velocity due to the round window stimulation at 1 mArms was equivalent to that of stapes velocity at 94 dB SPL sound stimulation. Thus, the evaluation study shows that the 3-pole type EM transducer is suitable for implantable hearing devices. PMID:25226951

Shin, Dong Ho; Lim, Hyung-Gyu; Jung, Eui Sung; Wei, Qun; Seong, Ki Woong; Lee, Jyung Hyun; Lee, Seung-Ha; Cho, Jin Ho

2014-01-01

437

The E-Step of the MGROUP EM Algorithm. Program Statistics Research Technical Report No. 93-37.  

ERIC Educational Resources Information Center

Mislevy (1984, 1985) introduced an EM algorithm for estimating the parameters of a latent distribution model that is used extensively by the National Assessment of Educational Progress. Second order asymptotic corrections are derived and applied along with more common first order asymptotic corrections to approximate the expectations required by…

Thomas, Neal

438

Intravenous adenosine as first-line prehospital management of narrow-complex tachycardias by EMS personnel without direct physician control  

Microsoft Academic Search

This study was conducted to evaluate the safety and efficacy of intravenous adenosine therapy for prehospital treatment of narrow-complex tachycardias with a presumptive field diagnosis of paroxysmal supraventricular tachycardia (PSVT) by paramedics without direct physician control. A ten-month prospective case series was designed in an urban EMS system that has paramedics operating under standing orders before physician radio contact. All

Richard Furlong; Robert T Gerhardt; Pamela Farber; Kathleen Schrank; Regina Willig; Juan Pittaluga

1995-01-01

439

Finite-difference simulation of borehole EM logging measurements in 3D anisotropic subsurface media using coupled potentials  

E-print Network

media using coupled potentials Junsheng Hou and Carlos Torres-Verdín Department of Petroleum using a coupled vector-scalar potential formulation in arbitrary 3D inhomogeneous anisotropic media efficiently and expediently simulate EM fields in 3D inhomogeneous anisotropic media with highly discontinuous

Torres-Verdín, Carlos

440

VARIATIONAL EM FOR BINAURAL SOUND-SOURCE SEPARATION AND LOCALIZATION Antoine Deleforge, Florence Forbes and Radu Horaud  

E-print Network

VARIATIONAL EM FOR BINAURAL SOUND-SOURCE SEPARATION AND LOCALIZATION Antoine Deleforge, Florence between white-noise source locations and binaural cues is estimated. Secondly, SSL is solved via Bayesian- formation about the relationship between the binaural obser- vation space and the two-dimensional (2D

Boyer, Edmond

441

48 28th ANNUAL eMS CHROMIUM(llI) INDUCED SOLID PHASE TRANSFORMATION OF o-Mn02  

E-print Network

48 28th ANNUAL eMS CHROMIUM(llI) INDUCED SOLID PHASE TRANSFORMATION OF o-Mn02 Fendorf S. Chromium is a heavy metal which is stable in two oxidation states under surface environmental conditions a commonly occurring form of Mn-oxide, o-MnQz, to investigate the oxidation of Cr(III). Chromium

Sparks, Donald L.

442

EM characteristics of the RAS composed of E-glass\\/epoxy composite and single dipole FSS element  

Microsoft Academic Search

From the methods to reduce radar cross section (RCS) such as shaping of the target, radar absorbing material (RAM), and radar absorbing structure (RAS), the RAS composed of frequency selective surface (FSS) screens and low-loss composite materials is used widely because the FSS screen transmits or reflects electromagnetic (EM) waves selectively and the composite material withstands external loads. In this

Po Chul Kim; Woo Seok Chin; Dai Gil Lee; Il Sung Seo

2006-01-01

443

An EM approach to MAP solution of segmenting tissue mixture percentages with application to CT-based virtual colonoscopy  

E-print Network

for publication 15 October 2008; published 20 November 2008 Electronic colon cleansing ECC is an emerging in incomplete and overcomplete cleansings. To address the PV effect, this work investigated an improved maximum in Medicine. DOI: 10.1118/1.3013591 Key words: electronic colon cleansing, partial volume effect, MAP-EM image

444

AN EM APPROACH FOR POISSON-GAUSSIAN NOISE MODELING Anna Jezierska, Caroline Chaux, Jean-Christophe Pesquet, and Hugues Talbot  

E-print Network

are usually unknown. For many simple probability distributions (e.g. Gaussian, Poisson,...), standard are feasible (possibly through a calibration process). The literature on parameter estimation for a PoissonAN EM APPROACH FOR POISSON-GAUSSIAN NOISE MODELING Anna Jezierska, Caroline Chaux, Jean

Paris-Sud XI, Université de

445

RESISTÊNCIA NATURAL DE NOVE MADEIRAS DO SEMI-ÁRIDO BRASILEIRO A CUPINS SUBTERRÂNEOS, EM ENSAIO DE LABORATÓRIO  

Microsoft Academic Search

RESUMO: O objetivo da pesquisa foi avaliar a resistência de nove madeiras de ocorrência no semi- árido brasileiro a cupins subterrâneos, em condições de laboratório. As madeiras estudadas foram a al- garoba (Prosopis juliflora), angico (Piptadenia macrocarpa), aroeira (Myracrodruon urundeuva), braúna (Schinopsis brasiliensis), cássia (Senna siamea), craibeira (Tabebuia aurea), cumaru (Amburana cearenses), pau d'arco (Tabebuia impetiginosa) e o pereiro (Aspidosperma

Juarez Benigno Paes; Verlândia de Medeiros Morais; Desmoulins Wanderley; Farias Sobrinho; Olaf Andreas Bakke

446

Paolo Parrini, Wesley C. Salmon & Merrilee H. Salmon (eds.), Logical Em-piricism: Historical & Contemporary Perspectives. Pittsburgh: University  

E-print Network

Paolo Parrini, Wesley C. Salmon & Merrilee H. Salmon (eds.), Logical Em- piricism: Historical & Contemporary Perspectives. Pittsburgh: University of Pittsburgh Press, 2003. ix + 396pp. 49.95 US$. ISBN 0 empiricists. This has led to a nicely balanced collection that combines careful historical study with an eye

Pincock, Chris

447

Identifying Salinity Sources and Quantifying Salinity Loads Along Two Texas Streams Using Stream-axis Airborne EM and Focused Hydrochemistry  

NASA Astrophysics Data System (ADS)

We delineated natural and oil-field salinity sources that degrade water quality in the upper Colorado River (west Texas) and Petronila Creek (Texas coast) by combining multi-frequency airborne EM measurements of apparent ground conductivity with chemical analyses of surface water at key stream locations. To reduce the cost of high-resolution airborne surveying over such large areas, we first flew along the stream axes and then examined preliminary results in the field to identify likely salinized stream segments. We then flew more detailed surveys over these areas rather than over the entire basin. Stream-axis EM data also helped identify water-sampling locations upstream and downstream from each salinized segment. We used these data to calculate salinity loads and discriminate among possible natural and oil-field salinity sources. We acquired stream-axis airborne EM data along 437 km of the upper Colorado River and its major tributaries using a Geophex GEM-2A instrument operating at five frequencies between 450 Hz and 39 kHz. Increases in chloride, sulfate, and total salinity loading in the upper Colorado River basin between Lake Thomas and Ivie Reservoir occur along eleven segments of elevated apparent conductivity identified from airborne EM data. Each segment encompasses areas of baseflow salinity contributions to the stream from natural dissolution of evaporite minerals in the Permian basin, from oil-field produced water, or both. Analyses of surface water confirm increases salinity loading associated with each segment. Airborne EM data acquired on the coast along Petronila Creek and within a corridor centered on it revealed three stream segments with elevated ground conductivity. Increases in chloride, sulfate, and total salinity loading are attributed to shallow baseflow contributions along the three segments. Using airborne EM and hydrochemistry data, we interpret the dominant salinization mechanism within the two upstream segments to be historic discharge of produced water into unlined drainage ditches and pits, infiltration into sandy Pleistocene channel deposits, lateral migration as far as several kilometers, and discharge into the stream. Airborne EM and hydrochemical data suggest a combination of oil-field and seawater salinity contributions at the most downstream Petronila Creek segment.

Paine, J. G.; Collins, E. W.; Nance, H. S.; Niemann, K.

2005-12-01

448

A correlação índice espectral vs. luminosidade em QSOs e suas implicações  

NASA Astrophysics Data System (ADS)

Estudos de variabilidade de núcleos ativos já demonstraram ser comum o fato de seu contínuo óptico/UV tornar-se mais "duro" à medida que a luminosidade aumenta. Essa tendência ocorre tanto de forma individual quanto global, e pode ter implicações importantes (1) para estudos fotométricos de variabilidade conduzidos numa banda fixa no referencial do observador, comparando objetos a diferentes redshifts, e (2) no cálculo da correção K, com consequente impacto na determinação de massas de buracos negros e bojos de galáxias hospedeiras (através da relação de Magorrian). Confirmo aqui as correlações positivas entre o índice espectral e a luminosidade óptica, utilizando dados espectroscópicos de 11 QSOs monitorados no Brasil e no Chile, durante ~2 anos. O estudo é complementado com parâmetros extraídos de espectros e de dados fotométricos públicos de quasares. Destaco ainda as diferenças observadas em tais correlações para objetos do tipo radio-loud e radio-quiet. Este projeto é financiado pelo I. Milênio/CNPq.

Garcia-Rissmann, A.

2003-08-01

449

Reservoir characterization and process monitoring with EM methods. 1993 Annual report  

SciTech Connect

During the past four years at Lawrence Livermore National Laboratory (LLNL) the authors have applied the EM induction method to the problem of thermal front tracking during EOR operations. During this past year, they have also turned their attention to the larger, but related, problem of petroleum reservoir characterization. As in the past, this research is a collaborative effort. The main focus of activities at LLNL is hardware development, field measurement and geological interpretation of the results. The authors are dependent on others for theoretical and software development, geological information and the availability of sites to test field systems. Collaborative interdependency serves to make research dollars stretch further and allows completion of the tasks in a timely manner. In this annual report the authors discuss the progress in the development of numerical modeling codes, describe improvements to the field system and present some field results.

Wilt, M.

1994-09-01

450

The air quality monitoring program for the 1100-EM-1 remedial investigation  

SciTech Connect

Air quality monitoring for the remedial investigation of the Hanford Site's 1100-EM-1 operable unit was conducted in the spring and fall of 1989 and during January 1990. The monitoring program was divided into two phases. The first phase examined the air quality impact of routine atmospheric emissions at three of the operable unit's waste sites before the beginning of intrusive remedial investigation activities. The second phase of monitoring examined the air quality impact of routine atmospheric emissions from two of the operable unit's waste sites during intrusive remedial investigation activities. Each phase of the program consisted of a series of monitoring events that measured pollutant concentrations at key locations upwind and downwind of individual waste sites. During each monitoring event, sampling was conducted to determine the air concentrations of a wide variety of volatile organic compounds and semivolatile organic compounds. Monitoring for heavy metals and asbestos was also conducted during some monitoring events. 8 refs., 15 figs., 9 tabs.

Glantz, C.S.; Laws, G.L.

1990-09-01

451

Peaks and decays of student knowledge in an introductory E&M course  

NSDL National Science Digital Library

A common format for assessment of learning is pretesting and post-testing. In this study, we collect student test data several times per week throughout a course, allowing for the measurement of the changes in student knowledge with a time resolution on the order of a few days. To avoid the possibility of test-retest effects, separate and quasirandom subpopulations of students are tested on a variety of tasks. We report on data taken in a calculus-based introductory E&M class populated primarily by engineering majors. Unsurprisingly for a traditional introductory course, there is little change in many conceptual questions. However, the data suggest that some student performance peaks and decays rapidly during a quarter, a pattern consistent with memory research yet unmeasurable by pretesting and post-testing. In addition, it appears that some course topics can interfere with prior knowledge, decreasing performance on questions related to earlier topics in the course.

Sayre, Eleanor C.; Heckler, Andrew F.

2010-06-29

452

Super ready: how a regional approach to Super Bowl EMS paid off.  

PubMed

The Super Bowl and its associated activities represent one of the largest special events in the world. Super Bowl XLVIII was geographically unique because the NFL's and Super Bowl Host Committee's activities, venues and events encompassed two states and fell across numerous jurisdictions within six counties (Bergen, Hudson, Morris, Essex, Middlesex, and Manhattan).This Super Bowl was the first to do this. EMS was one of the largest operational components during this event. Last and most important, it is the people and relationships that make any planning initiative and event a success. Sit down and have a cup a coffee with your colleagues, partners and neighbors in and out of state to discuss your planning initiatives. Do it early-it will make your efforts less painful should an event of this magnitude come to a city near you! PMID:25181868

Clancy, Terry; Cortacans, Henry P

2014-07-01

453

Test of 3D CT reconstructions by EM + TV algorithm from undersampled data  

NASA Astrophysics Data System (ADS)

Computerized tomography (CT) plays an important role in medical imaging for diagnosis and therapy. However, CT imaging is connected with ionization radiation exposure of patients. Therefore, the dose reduction is an essential issue in CT. In 2011, the Expectation Maximization and Total Variation Based Model for CT Reconstruction (EM+TV) was proposed. This method can reconstruct a better image using less CT projections in comparison with the usual filtered back projection (FBP) technique. Thus, it could significantly reduce the overall dose of radiation in CT. This work reports the results of an independent numerical simulation for cone beam CT geometry with alternative virtual phantoms. As in the original report, the 3D CT images of 128×128×128 virtual phantoms were reconstructed. It was not possible to implement phantoms with lager dimensions because of the slowness of code execution even by the CORE i7 CPU.

Evseev, Ivan; Ahmann, Francielle; da Silva, Hamilton P.; Schelin, Hugo R.; Yevseyeva, Olga; Klock, Márgio C. L.

2013-05-01

454

Effects of Dielectric Values and Substrate Materials on Electromagnetic (EM) Absorption in Human Head  

NASA Astrophysics Data System (ADS)

The aim of this study was to considered possible discrepancy in electromagnetic (EM) fascination in the human head. Commercially available software CST Microwave Studio based on the finite-difference time-domain (FDTD) method was adopted in this study. In this calculation, the conductivity and permittivity of all tissues were increased from 10 to 20% except using if not the same revelation conditions. Familiar cellular phone frequencies of 835, 900, and 1900 MHz were investigated in this research. The rise of up to 20% in conductivity, permittivity and varied substrate material always caused a SAR variation of 30.42% for SAR 1 g and 23.75% for SAR 10 g at 835 MHz, variation of 22.41% for SAR 1 g and 21.96% for SAR 10 g at 900 MHz and variation of 11.96% for SAR 1 g and 14.29% for SAR 10 g at 1900 MHz respectively.

Faruque, Mohammad Rashed Iqbal; Islam, Mohammad Tariqul; Misran, Norbahiah

2012-03-01

455

SEI: Upper-Division Electrodynamics (E&M 2) Course Materials  

NSDL National Science Digital Library

This web site contains a complete suite of resources suitable for the second semester of an undergraduate electricity and magnetism class. The materials developed include a suite of clicker questions, in-class activities, homework problems, and other assessments. The topics covered include Maxwell's time-dependent equations, AC circuits, conservation laws, electromagnetic waves in vacuum and media, potentials and gauge transformations, radiation & special relativity. This package of course materials also contains implementation guides, an archive of several past E&M II courses at the University of Colorado, and supporting materials such as explicit learning goals, relevant education research articles, and notes on common student difficulties. The materials are available in Word, Powerpoint, and PDF formats to facilitate their adaptation and implementation by others. Assessment materials are available from the authors upon request. The authors of these materials are seeking feedback to help in the refinement and improvement of these course materials and assessments.

Baily, Charles; Pollock, Steven J.; Dubson, Michael

2012-07-25

456

Effect of ELF e.m. fields on metalloprotein redox-active sites  

E-print Network

The peculiarity of the distribution and geometry of metallic ions in enzymes pushed us to set the hypothesis that metallic ions in active-site act like tiny antennas able to pick up very feeble e.m. signals. Enzymatic activity of Cu2+, Zn2+ Superoxide Dismutase (SOD1) and Fe2+ Xanthine Oxidase (XO) has been studied, following in vitro generation and removal of free radicals. We observed that Superoxide radicals generation by XO is increased by a weak field having the Larmor frequency fL of Fe2+ while the SOD1 kinetics is sensibly reduced by exposure to a weak field having the frequency fL of Cu2+ ion.

De Ninno, A; Ferrari, V; Gerardi, G; Barbaro, F; Badon, T; Bernardini, D

2008-01-01

457

Effect of ELF e.m. fields on metalloprotein redox-active sites  

E-print Network

The peculiarity of the distribution and geometry of metallic ions in enzymes pushed us to set the hypothesis that metallic ions in active-site act like tiny antennas able to pick up very feeble e.m. signals. Enzymatic activity of Cu2+, Zn2+ Superoxide Dismutase (SOD1) and Fe2+ Xanthine Oxidase (XO) has been studied, following in vitro generation and removal of free radicals. We observed that Superoxide radicals generation by XO is increased by a weak field having the Larmor frequency fL of Fe2+ while the SOD1 kinetics is sensibly reduced by exposure to a weak field having the frequency fL of Cu2+ ion.

A. De Ninno; M. Prosdocimi; V. Ferrari; G. Gerardi; F. Barbaro; T. Badon; D. Bernardini

2008-01-18

458

SEI: Junior E&M I Course Materials - Concept Tests/Clicker Questions  

NSDL National Science Digital Library

This concept test / clicker question collection was constructed over the course of four semesters of a transformed junior-level Electricity and Magnetism course on electro- and magneto-statics. The questions are intended to be used with personal response systems as peer instruction. Some comments in the notes section of each slide provides information about the results of use in class, such as average student responses. This material was developed as part of a education research-based course transformation for junior level E&M. All of the resources developed for this course are available, sorted by individual topic and type, at http://www.compadre.org/psrc/items/Relations.cfm?ID=7891.

Pollock, Steven J.; Chasteen, Stephanie V.; Kinney, Edward; Dubson, Michael

2010-06-09

459

Validation of a Conceptual Assessment Tool in E&M II  

E-print Network

As part of an ongoing project to investigate student learning in upper-division electrodynamics (E&M II), the PER research group at the University of Colorado Boulder has developed a tool to assess student conceptual understanding: the CURrENT (Colorado UppeR-division ElectrodyNamics Test). The result is an open-ended post-test diagnostic with 6 multi-part questions, an optional 3-question pretest, and an accompanying grading rubric. This instrument is motivated in part by our faculty-consensus learning goals, and is intended to help measure the effectiveness of transformed pedagogy. In addition, it provides insights into student thinking and student difficulties in the covered topical areas. In this paper, we present preliminary measures of the validity and reliability of the instrument and scoring rubric. These include expert validation and student interviews, inter-rater reliability measures, and classical test statistics.

Ryan, Qing X; Baily, Charles; Pollock, Steven J

2014-01-01

460

Modal, ray, and beam techniques for analyzing the EM scattering by open-ended waveguide cavities  

NASA Technical Reports Server (NTRS)

The problem of high-frequency electromagnetic (EM) scattering by open-ended waveguide cavities with an interior termination is analyzed via three different approaches. When cavities can be adequately modeled by joining together piecewise separable waveguide sections, a hybrid combination of asymptotic high-frequency and modal techniques is employed. In the case of more arbitrarily shaped waveguide cavities for which modes cannot even be defined in the conventional sense, the geometrical optics ray approach proves to be highly useful. However, at sufficiently high frequencies, both of these approaches tend to become inefficient. Hence, a paraxial Gaussian batch technique, which retains much of the simplicity of the ray approximation but is potentially more efficient, is investigated. Typical numerical results based on the different approaches are discussed.

Pathak, Prabhakar H.; Burkholder, Robert J.

1989-01-01

461

Structure of archaeal proteasomal ATPase PAN by single particle cryoEM  

NASA Astrophysics Data System (ADS)

ATP dependent protein degradation in eukaryotes by 26S proteasome are essential for many cellular processes including apoptosis, cell cycles and signal transduction. 26S proteasome is composed of a barrel shaped 20S protease core and two regulatory particles capped on each end. The ATPases in the 19S regulatory particles unfold and translocate substrates into 20S for degradation. Archaea has a homologous yet simpler 20S proteasome and a regulatory ATPase, proteasome activating nucleotidase (PAN.) In this study we used single particle cryoEM to study the three dimensional structure of PAN. We obtained a 3D reconstruction of PAN at a resolution of 18 Angstroms. By docking the atomic structure of PAN's N-terminal domain and ATPase domain to the atomic structure determined x-ray crystallography, we generated an atomic model of full length PAN ATPase. )

Royal, Renee; Yadong, Yu; Cheng, Yifan

2010-02-01

462

System architecture and market aspects of an European Land Mobile Satellite System via EMS  

NASA Astrophysics Data System (ADS)

The paper describes an implementation scenario of a Land Mobile Satellite System via the EMS (European Mobile System) payload embarked on Italsat F-2. Some emphasis is given on market issues aiming at singling out business niches of Land Mobile Satellite Services (LMSS) in Europe. Other crucial issues exist such as: the alternate/competitive systems, the problems of interworking with other existing and/or planned systems, the definition of network architecture that better fits the user requirements, the marketing strategy and, last but not least, the financial evaluation of the project. The paper, on the basis of a study performed by Telespazio on behalf of ESA, discusses some of these issues with emphasis on competitive market aspects.

Ananasso, F.; Mistretta, I.

1992-03-01

463

Selection and characterization of lead alloys for use in the SDC EM Calorimeter  

SciTech Connect

Lead, because of it`s density and ductility, has been used by man for centuries for many things ranging from building materials, to piping; from electrical connections, to radiation shielding, and batteries. However, despite it`s extensive and varied use, not much is really known about it`s exact physical and structural properties except in a very rudimentary way. The SDC cast lead EM Calorimeter needs to take full advantage of all the properties that the lead alloy has to offer. Hence, a very thorough and detailed understanding of the properties of the lead-absorber structure must be obtained and controlled, so that the integrity of the calorimeter is not compromised. This paper will attempt to detail a series of ongoing experiments used to characterize and define the properties of the Calcium-Tin-Lead alloys for use in the SDC cast lead electromagnetic calorimeter.

Nasiatka, J.

1993-12-01

464

a Generalization of the Deterministic Annealing EM Algorithm by Means of Non-Extensive Statistical Mechanics  

NASA Astrophysics Data System (ADS)

We extend the EM algorithm to overcome its bottleneck, that is to say, the problem of local maxima of the marginal likelihood due to its strong dependence of initial conditions. As an alternative posterior distribution appearing in the so-called Q function, we use the distribution that maximizes the non-extensive Tsallis entropy. The distribution we introduce has a parameter q which represents the non-extensive property of the entropy. We control the parameter q so as to weaken the influence of the initial conditions. In order to investigate its performance, we apply our algorithm to Gaussian mixture estimation problems under some additive noises. In large data limit, we derive the averaged update equations with respect to hyper-parameters, marginal likelihood etc. analytically. Our analysis supports usefulness of our algorithm.

Inoue, Jun-Ichi; Tabushi, Katsumi

465

Solar wind-magnetosphere interaction as simulated by a 3D, EM particle code  

NASA Technical Reports Server (NTRS)

The results of simulating the solar wind-magnetosphere interaction with a three dimensional, electromagnetic (EM) particle code are presented. Hitherto such global simulations were done with magnetohydrodynamic (MHD) codes while lower dimensional particle or hybrid codes served to account for microscopic processes and such transport parameters as have to be introduced ad hoc in MHD. The kinetic model combines macroscopic and microscopic tasks. It relies only on the Maxwell curl equations and the Lorentz equation for particles. The preliminary results are for an unmagnetized solar wind plasma streaming past a dipolar magnetic field. The results show the formation of a bow shock and a magnetotail, the penetration of energetic particles into cusp and radiation belt regions, and dawn to dusk asymmetries.

Buneman, O.; Nishikawa, Ken-Ichi; Neubert, T.

1993-01-01

466

Integration of Cluster Ensemble and EM based Text Mining for Microarray Gene Cluster Identification and Annotation  

E-print Network

In this paper, we design and develop a unified system GE-Miner (Gene Expression Miner) to integrate cluster ensemble, text clustering and multi document summarization and provide an environment for comprehensive gene expression data analysis. We present a novel cluster ensemble approach to generate high quality gene cluster. In our text summarization module, given a gene cluster, our Expectation Maximization (EM) based algorithm can automatically identify subtopics and extract most probable terms for each topic. Then, the extracted top k topical terms from each subtopic are combined to form the biological explanation of each gene cluster. Experimental results demonstrate that our system can obtain high quality clusters and provide informative key terms for the gene clusters.

Xiaohua Hu

467

Direct 4D List Mode Parametric Reconstruction for PET with a Novel EM Algorithm  

PubMed Central

We present a direct method for producing images of kinetic parameters from list mode PET data. The time-activity curve for each voxel is described by a one-tissue compartment, 2-parameter model. Extending previous EM algorithms, a new spatiotemporal complete data space was introduced to optimize the maximum likelihood function. This leads to a straightforward parametric image update equation with moderate additional computation requirements compared to the conventional algorithm. Qualitative and quantitative evaluations were performed using 2D (x,t) and 4D (x,y,z,t) simulated list mode data for a brain receptor study. Comparisons with the two-step approach (frame-based reconstruction followed by voxel-by-voxel parameter estimation) show that the proposed method can lead to accurate estimation of the parametric image values with reduced variance, especially for the volume of distribution (VT). PMID:20628540

Yan, Jianhua; Planeta-Wilson, Beata; Carson, Richard E.

2010-01-01

468

Crosshole EM for oil field characterization and EOR monitoring: Field examples from Lost Hills, California  

SciTech Connect

A steamflood recently initiated by Mobil Development and Production U.S. at the Lost Hills No 3 oil field in California is notable for its shallow depth and the application of electromagnetic (EM) geophysical techniques to monitor the subsurface steam flow. Steam was injected into three stacked eastward-dipping unconsolidated oil sands at depths from 60 to 120 m; the plume is expected to develop as an ellipsoid aligned with the regional northwest-southeast strike. Because of the shallow depth of the sands and the high viscosity of the heavy oil, it is important to track the steam in the unconsolidated sediments for both economic and safety reasons. Crosshole and surface-to-borehole electromagnetic imaging were applied for reservoir characterization and steamflood monitoring. The crosshole EM data were collected to map the interwell distribution of the high-resistivity oil sands and to track the injected steam and hot water. Measurements were made in two fiberglass-cased observation wells straddling the steam injector on a northeast-southwest profile. Field data were collected before the steam drive, to map the distribution of the oil sands, and then 6 and 10 months after steam was injected, to monitor the expansion of the steam chest. Resistivity images derived from the collected data clearly delineated the distribution and dipping structure of the target oil sands. Difference images from data collected before and during steamflooding indicate that the steam chest has developed only in the middle and lower oil sands, and it has preferentially migrated westward in the middle oil sand and eastward in the deeper sand. Surface-to-borehole field data sets at Lost Hills were responsive to the large-scale subsurface structure but insufficiently sensitive to model steam chest development in the middle and lower oil sands. As the steam chest develops further, these data will be of more use for process monitoring.

Wilt, M.; Schenkel, C.; Wratcher, M.; Lambert, I.; Torres-Verdin, C.; Tseng H.W.

1996-07-16

469

High Fill-Out, Extreme Mass Ratio Overcontact Binary Systems. VIII. EM Piscium  

NASA Astrophysics Data System (ADS)

CCD photometric observations of the newly discovered close binary, EM Piscium, obtained from 2006 December 4 to 2008 January 7, are presented. The light curves are symmetric and show complete eclipses with an eclipse duration of 54 minutes. When comparing the present light curves with those published by González-Rojas et al., it is found that the depths of the two minima of the light curve have been interchanged, and the positive O'Connell effect has disappeared. The symmetric light curves in R and I bands were analyzed with the 2003 version of the W-D code. It is found that EM Piscium is a high fill-out overcontact binary system (f = 95.3 ± 2.7%) with an extreme mass ratio of q = 0.1487, suggesting that it is on the late evolutionary stage of late-type tidal-locked binaries. Based on the nine instances of light minimum that we determined and those published by previous investigators, it is discovered that the orbital period shows a cyclic period variation with a period of 3.3 years, while it undergoes a continuously rapid increase at a rate of dP/dt = +3.97 × 10-6 days year-1. The cyclic period reveals the presence of a tertiary companion, which may play an important role for the formation and evolution of the overcontact binary by drawing angular momentum from the central system via Kozai oscillation or a combination of Kozai cycle and tidal friction. The high fill-out, the extreme mass ratio, and the rapid period increase may suggest that the binary system is quickly evolving into a rapid-rotating single star.

Qian, S.-B.; He, J.-J.; Soonthornthum, B.; Liu, L.; Zhu, L.-Y.; Li, L.-J.; Liao, W. P.; Dai, Z.-B.

2008-11-01

470

EM-navigated catheter placement for gynecologic brachytherapy: an accuracy study  

NASA Astrophysics Data System (ADS)

Gynecologic malignancies, including cervical, endometrial, ovarian, vaginal and vulvar cancers, cause significant mortality in women worldwide. The standard care for many primary and recurrent gynecologic cancers consists of chemoradiation followed by brachytherapy. In high dose rate (HDR) brachytherapy, intracavitary applicators and /or interstitial needles are placed directly inside the cancerous tissue so as to provide catheters to deliver high doses of radiation. Although technology for the navigation of catheters and needles is well developed for procedures such as prostate biopsy, brain biopsy, and cardiac ablation, it is notably lacking for gynecologic HDR brachytherapy. Using a benchtop study that closely mimics the clinical interstitial gynecologic brachytherapy procedure, we developed a method for evaluating the accuracy of image-guided catheter placement. Future bedside translation of this technology offers the potential benefit of maximizing tumor coverage during catheter placement while avoiding damage to the adjacent organs, for example bladder, rectum and bowel. In the study, two independent experiments were performed on a phantom model to evaluate the targeting accuracy of an electromagnetic (EM) tracking system. The procedure was carried out using a laptop computer (2.1GHz Intel Core i7 computer, 8GB RAM, Windows 7 64-bit), an EM Aurora tracking system with a 1.3mm diameter 6 DOF sensor, and 6F (2 mm) brachytherapy catheters inserted through a Syed-Neblett applicator. The 3D Slicer and PLUS open source software were used to develop the system. The mean of the targeting error was less than 2.9mm, which is comparable to the targeting errors in commercial clinical navigation systems.

Mehrtash, Alireza; Damato, Antonio; Pernelle, Guillaume; Barber, Lauren; Farhat, Nabgha; Viswanathan, Akila; Cormack, Robert; Kapur, Tina