Science.gov

Sample records for coroas dos incisivos

  1. DOS basics

    SciTech Connect

    O`Connor, P.

    1994-09-01

    DOS is an acronym for Disk Operating System. It is actually a set of programs that allows you to control your personal computer. DOS offers the capabilities to create and manage files; organize and maintain information placed on disks; use application programs such as WordPerfect, Lotus 123, Excel, Windows, etc. In addition, DOS provides the basic utilities needed to copy files from one area to another, delete files and list files. The latest version of DOS also offers more advanced features that include hard disk compression and memory management. Basic DOS commands are discussed.

  2. Different Roles of DosS and DosT in the Hypoxic Adaptation of Mycobacteria▿

    PubMed Central

    Kim, Min-Ju; Park, Kwang-Jin; Ko, In-Jeong; Kim, Young Min; Oh, Jeong-Il

    2010-01-01

    The DosS (DevS) and DosT histidine kinases form a two-component system together with the DosR (DevR) response regulator in Mycobacterium tuberculosis. DosS and DosT, which have high sequence similarity to each other over the length of their amino acid sequences, contain two GAF domains (GAF-A and GAF-B) in their N-terminal sensory domains. Complementation tests in conjunction with phylogenetic analysis showed that DevS of Mycobacterium smegmatis is more closely related to DosT than DosS. We also demonstrated in vivo that DosS and DosT of M. tuberculosis play a differential role in hypoxic adaptation. DosT responds to a decrease in oxygen tension more sensitively and strongly than DosS, which might be attributable to their different autooxidation rates. The different responsiveness of DosS and DosT to hypoxia is due to the difference in their GAF-A domains accommodating the hemes. Multiple alignment analysis of the GAF-A domains of mycobacterial DosS (DosT) homologs and subsequent site-directed mutagenesis revealed that just one substitution of E87, D90, H97, L118, or T169 of DosS with the corresponding residue of DosT is sufficient to convert DosS to DosT with regard to the responsiveness to changes in oxygen tension. PMID:20675480

  3. Investigação dos perfís temporais de alta resolução de explosões solares tipo-III decimétricas

    NASA Astrophysics Data System (ADS)

    Cecatto, J. R.; Fernandes, F. C. R.; Sawant, H. S.; Madsen, F. R. H.

    2003-08-01

    Explosões solares tipo-III indicam a presença de feixes de elétrons acelerados durante "flares" solares. Sua investigação fornece informações tanto sobre os processos de aceleração de partículas quanto das características do agente causador e do local de aceleração. Explosões tipo-III decimétricas são geradas por feixes de elétrons viajando através de arcos magnéticos densos da baixa coroa solar. Os perfís temporais destes fenômenos, quando tomados com alta resolução, informam sobre os mecanismos de aceleração de partículas do feixe e o meio de transporte da energia liberada a partir da região de aceleração. Usando o Brazilian Solar Spectroscope (BSS), em operação no INPE, foram registradas dezenas de explosões tipo-III decimétricas, dentro da faixa de 2050-2250 MHz com alta resolução temporal (20 ms), em 13 de setembro de 2001, entre 13:00 e 16:10 UT. Foram selecionadas 10 explosões isoladas para uma investigação estatística detalhada de seus perfís temporais, em todos os cerca de 50 canais de freqüência. Os resultados indicam que cerca de 70% dos perfís temporais são complexos tanto durante a subida quanto descida. Os 30% restantes indicam que os perfís da subida podem ser bem representados, na maioria dos casos, por um processo não-linear e uma parcela significativa por processos lineares. Os perfís temporais da descida são dominados por um decaimento não-linear. Neste trabalho, será efetuada uma análise dos perfís temporais, tanto durante a subida quanto descida do fluxo, para as explosões selecionadas, em termos dos prováveis mecanismos de aceleração e relaxamento. 2

  4. A DOS Primer for Librarians: Part II.

    ERIC Educational Resources Information Center

    Beecher, Henry

    1990-01-01

    Provides an introduction to DOS commands and strategies for the effective organization and use of hard disks. Functions discussed include the creation of directories and subdirectories, enhanced copying, the assignment of disk drives, and backing up the hard disk. (CLB)

  5. DOS: the discrete-ordinates system. [LMFBR

    SciTech Connect

    Rhoades, W. A.; Emmett, M. B.

    1982-09-01

    The Discrete Ordinates System determines the flux of neutrons or photons due either to fixed sources specified by the user or to sources generated by particle interaction with the problem materials. It also determines numerous secondary results which depend upon flux. Criticality searches can be performed. Numerous input, output, and file manipulation facilities are provided. The DOS driver program reads the problem specification from an input file and calls various program modules into execution as specified by the input file.

  6. Disk Operating System--DOS. Teacher Packet. Learning Activity Packets.

    ERIC Educational Resources Information Center

    Oklahoma State Dept. of Vocational and Technical Education, Stillwater. Curriculum and Instructional Materials Center.

    The Learning Activity Packets (LAPs) contained in this manual are designed to assist the beginning user in understanding DOS (Disk Operating System). LAPs will not work with any version below DOS Version 3.0 and do not address the enhanced features of versions 4.0 or higher. These elementary activities cover only the DOS commands necessary to

  7. Fast interrupt platform for extended DOS

    NASA Technical Reports Server (NTRS)

    Duryea, T. W.

    1995-01-01

    Extended DOS offers the unique combination of a simple operating system which allows direct assess to the interrupt tables, 32 bit protected mode access to a 4096 MByte address space, and the use of industry standard C compilers. The drawback is that fast interrupt handling requires both 32 bit and 16 bit versions of each real-time process interrupt handler to avoid mode switches on the interrupts. A set of tools has been developed which automates the process of transforming the output of a standard 32 bit C compiler to 16 bit interrupt code which directly handles the real mode interrupts. The entire process compiles one set of source code via a make file, which boosts productivity by making the management of the compile-link cycle very simple. The software components are in the form of classes written mostly in C. A foreground process written as a conventional application which can use the standard C libraries can communicate with the background real-time classes via a message passing mechanism. The platform thus enables the integration of high performance real-time processing into a conventional application framework.

  8. Fast interrupt platform for extended DOS

    NASA Technical Reports Server (NTRS)

    Duryea, T. W.

    1995-01-01

    Extended DOS offers the unique combination of a simple operating system which allows direct access to the interrupt tables, 32 bit protected mode access to 4096 MByte address space, and the use of industry standard C compilers. The drawback is that fast interrupt handling requires both 32 bit and 16 bit versions of each real-time process interrupt handler to avoid mode switches on the interrupts. A set of tools has been developed which automates the process of transforming the output of a standard 32 bit C compiler to 16 bit interrupt code which directly handles the real mode interrupts. The entire process compiles one set of source code via a make file, which boosts productivity by making the management of the compile-link cycle very simple. The software components are in the form of classes written mostly in C. A foreground process written as a conventional application which can use the standard C libraries can communicate with the background real-time classes via a message passing mechanism. The platform thus enables the integration of high performance real-time processing into a conventional application framework.

  9. The Heme-Based Oxygen-Sensor Phosphodiesterase Ec DOS (DosP): Structure-Function Relationships

    PubMed Central

    Shimizu, Toru

    2013-01-01

    Escherichia coli Direct Oxygen Sensor (Ec DOS, also known as Ec DosP) is a heme-based O2-sensing phosphodiesterase from Escherichia coli that catalyzes the conversion of cyclic-di-GMP to linear di-GMP. Cyclic-di-GMP is an important second messenger in bacteria, highlighting the importance of understanding structure-function relationships of Ec DOS. Ec DOS is composed of an N-terminal heme-bound O2-sensing PAS domain and a C-terminal phosphodiesterase catalytic domain. Notably, its activity is markedly enhanced by O2 binding to the heme Fe(II) complex in the PAS sensor domain. X-ray crystal structures and spectroscopic and catalytic characterization of the wild-type and mutant proteins have provided important structural and functional clues to understanding the molecular mechanism of intramolecular catalytic regulation by O2 binding. This review summarizes the intriguing findings that have obtained for Ec DOS. PMID:25586128

  10. Dos and Don'ts for a Fabulous Pedicure

    MedlinePLUS

    Dos & Donts for a Fabulous Pedicure Everyone needs a little foot pampering from time to time! Whether you are getting ... pedicure at home or in the salon: Dont shave your legs before receiving a pedicure. Resist ...

  11. Izabel dos Santos and the training of the health workers.

    PubMed

    Paiva, Carlos Henrique Assuno

    2015-06-01

    This article discusses the career of Izabel dos Santos (1927-2010) as a means of examining the connections between health schools and agendas in contemporary Brazil. The article highlights dos Santos's training and her work in the Servio Especial de Sade Pblica (SESP- Special Public Health Service), the Pan American Health Organization (PAHO) and in the formulation and implementation of national training programs for human resources within the area of health from the late 1970s onwards. The article highlights dos Santos's central role in the formulation and implementation of training policies for health workers, especially nursing technicians and assistants, and demonstrates how she occupies an important place in the history of Brazilian public health. PMID:26060956

  12. MS DOS Tool Software Including Public Domain, Grades K-6.

    ERIC Educational Resources Information Center

    New York City Board of Education, Brooklyn, NY. Div. of Computer Information Services.

    This curriculum guide is designed to assist teachers and supervisors in introducing lower elementary students to the MS DOS computer and the word processing program PC Write. Accompanying this guide are two program disks: PC Write, which is a public domain word processing program and Disk Care, which reinforces rules for caring for disks. The…

  13. Dos dosis de vacuna contra los VPH pueden proteger

    Cancer.gov

    Dos dosis de Cervarix, la vacuna contra virus del papiloma humano (VPH), fueron tan efectivas como la pauta normal actual de tres dosis después de cuatro años de seguimiento. El estudio de vacuna en Costa Rica, patrocinado por el NCI, fue diseñado para ev

  14. When worlds collide - Mac to MS-DOS. [Data transfer to and from Apple Macintosh computers and MS-DOS based personal computers

    SciTech Connect

    Busbey, A.B.

    1989-04-01

    A number of methods and products, both hardware and software, to allow data exchange between Apple Macintosh computers and MS-DOS based systems. These included serial null modem connections, MS-DOS hardware and/or software emulation, MS-DOS disk-reading hardware and networking.

  15. Deceiving entropy-based DoS detection

    NASA Astrophysics Data System (ADS)

    Özçelik, Ä.°lker; Brooks, Richard R.

    2014-06-01

    Denial of Service (DoS) attacks disable network services for legitimate users. A McAfee report shows that eight out of ten Critical Infrastructure Providers (CIPs) surveyed had a significant Distributed DoS (DDoS) attack in 2010.1 Researchers proposed many approaches for detecting these attacks in the past decade. Anomaly based DoS detection is the most common. In this approach, the detector uses statistical features; such as the entropy of incoming packet header fields like source IP addresses or protocol type. It calculates the observed statistical feature and triggers an alarm if an extreme deviation occurs. However, intrusion detection systems (IDS) using entropy based detection can be fooled by spoofing. An attacker can sniff the network to collect header field data of network packets coming from distributed nodes on the Internet and fuses them to calculate the entropy of normal background traffic. Then s/he can spoof attack packets to keep the entropy value in the expected range during the attack. In this study, we present a proof of concept entropy spoofing attack that deceives entropy based detection approaches. Our preliminary results show that spoofing attacks cause significant detection performance degradation.

  16. Ultrafast ligand dynamics in the heme-based GAF sensor domains of the histidine kinases DosS and DosT from Mycobacterium tuberculosis

    PubMed Central

    Vos, Marten H.; Bouzhir-Sima, Latifa; Lambry, Jean-Christophe; Luo, Hao; Eaton-Rye, Julian J.; Ioanoviciu, Alexandra; Ortiz de Montellano, Paul R.; Liebl, Ursula

    2011-01-01

    The transcriptional regulator DosR from M. tuberculosis plays a crucial role in the virulence to dormancy transition of the pathogen. DosR can be activated by DosT and DosS, two histidine kinases with heme-containing sensor GAF domains, capable of diatomic ligand binding, To investigate the initial processes occurring upon ligand dissociation, we performed ultrafast time-resolved absorption spectroscopy of the isolated sensor domains ligated with O2, NO and CO. The results reveal a relatively closed heme pocket for both proteins. For DosT the yield of O2 escape from the heme pocket on the picoseconds timescale upon photodissociation was found to be very low (1.5%), similar to other heme-based oxygen sensor proteins, implying that this sensor acts as an effective O2 trap. Remarkably, this yield is an order of magnitude higher in DosS (18%). For CO, by contrast, the fraction of CO rebinding within the heme pocket is higher in DosS. Experiments with mutant DosT sensor domains and molecular dynamics simulations indicate an important role in ligand discrimination of the distal tyrosine, present in both proteins, which forms a hydrogen bond with heme-bound O2. We conclude that despite their similarity, DosT and DosS display ligand-specific different primary dynamics during the initial phases of intra-protein signaling. The distal tyrosine, present in both proteins, plays an important role in these processes. PMID:22142262

  17. Structures of Mycobacterium tuberculosis DosR and DosR-DNA Complex Involved in Gene Activation during Adaptation to Hypoxic Latency

    SciTech Connect

    Wisedchaisri, Goragot; Wu, Meiting; Rice, Adrian E; Roberts, David M; Sherman, David R; Hol, Wim G.J.

    2010-07-20

    On encountering low oxygen conditions, DosR activates the transcription of 47 genes, promoting long-term survival of Mycobacterium tuberculosis in a non-replicating state. Here, we report the crystal structures of the DosR C-terminal domain and its complex with a consensus DNA sequence of the hypoxia-induced gene promoter. The DosR C-terminal domain contains four {alpha}-helices and forms tetramers consisting of two dimers with non-intersecting dyads. In the DNA-bound structure, each DosR C-terminal domain in a dimer places its DNA-binding helix deep into the major groove, causing two bends in the DNA. DosR makes numerous protein-DNA base contacts using only three amino acid residues per subunit: Lys179, Lys182, and Asn183. The DosR tetramer is unique among response regulators with known structures.

  18. Observaes no mbito dos "additional programs" do satlite COROT

    NASA Astrophysics Data System (ADS)

    Janot Pacheco, E.

    2003-08-01

    O satlite Fraco-europeu COROT far fotometria de altissima preciso (pretende-se atingir uma parte em um milho), grande campo (3x3 graus) e por longos perodos, de duas regies pr-determinadas do cu, com 10 graus de raio. Suas finalidades bsicas sero estudos em sismologia estelar e a procura de exoplanetas. A comunidade astronmica brasileira participar dessa misso espacial, com direitos iguais aos dos parceiros europeus. Isso se deve a que o satlite utilizar a estao de recepo de dados de Natal (INPE), 5 a 6 brasileiros participaro das equipes de software e cientistas do pas atuaro na fase de pr-lanamento. Apresentamos nesta comunicao sugestes para a preparao de propostas de observaes com COROT, no mbito dos Programas Adicionais, que contemplam outros projetos que no de sismologia ou exoplanetas. As ltimas definies tcnicas e decises tomadas na 4th Corot Week de junho ltimo sero igualmente apresentadas, em particular quanto s regies de observao escolhidas e quanto aos procedimentos a seguir para se propor observaes.

  19. Sedimentation survey of Lago Dos Bocas, Puerto Rico, June 1985

    USGS Publications Warehouse

    Quinones, Ferdinand; Melendez, Frank; Bonnet, Carlos

    1989-01-01

    A survey of the sedimentation of Dos Bocas reservoir, in central Puerto Rico, was conducted during July 1985. The survey showed that the capacity of the reservoir has declined from 30,420 acre-ft in 1942 to about 19,620 acre-ft. Sediment is accumulating in the reservoir at an average rate of about 251 acre-ft/yr, or about 0.83%/yr of the original capacity. The expected usable life of the reservoir on the basis of the long-term sedimentation rate is about 78 years. However, the sedimentation rate appears to have increased significantly since 1979. During the last six years, the average sedimentation rate has exceeded 600 acre-ft/yr. If this rate is maintained, the expected usable life of the reservoir would be about 32 years. (Author 's abstract)

  20. Document image archive transfer from DOS to UNIX

    NASA Technical Reports Server (NTRS)

    Hauser, Susan E.; Gill, Michael J.; Thoma, George R.

    1994-01-01

    An R&D division of the National Library of Medicine has developed a prototype system for automated document image delivery as an adjunct to the labor-intensive manual interlibrary loan service of the library. The document image archive is implemented by a PC controlled bank of optical disk drives which use 12 inch WORM platters containing bitmapped images of over 200,000 pages of medical journals. Following three years of routine operation which resulted in serving patrons with articles both by mail and fax, an effort is underway to relocate the storage environment from the DOS-based system to a UNIX-based jukebox whose magneto-optical erasable 5 1/4 inch platters hold the images. This paper describes the deficiencies of the current storage system, the design issues of modifying several modules in the system, the alternatives proposed and the tradeoffs involved.

  1. Urano y sus dos satlites irregulares recientemente descubiertos

    NASA Astrophysics Data System (ADS)

    Parisi, M. G.; Brunini, A.

    Hasta hace poco tiempo, Urano era el nico de los Planetas Gigantes que no posea satlites irregulares. Esto lo diferenciaba del resto de los planetas Gigantes, al igual que la peculiar oblicuidad de su eje de spin. La gran inclinacin de su eje de rotacin se debe probablemente a una colisin que sufri el planeta con otro embrin planetario al final del proceso de formacin. Esta colisin habra desligado satlites exteriores preexistentes del planeta. Recientemente se han descubierto dos satlites irregulares de Urano, lo que introduce algunas nuevas cotas y condiciones en el escenario de la "Hiptesis de la Gran Colisin" . Los satlites irregulares de Urano tuvieron que ser capturados en una etapa posterior a la del escenario de la Gran Colisin, de no ser as, hubieran sido eyectados del sistema por el impulso impartido con ese gran impacto. En este trabajo, se discuten los posibles mecanismos de captura de los satlites irregulares y se presenta un nuevo posible mecanismo para dicha captura.

  2. Novas determinaes dos parmetros atmosfricos das estrelas ans brancas DA

    NASA Astrophysics Data System (ADS)

    Giovannini, O.; Costa, A. F. M.; Kepler, S. O.

    2003-08-01

    Ns temos selecionado uma amostra de estrelas ans brancas DA (atmosfera de hidrognio) a partir dos ndices de Strmgren cujos valores esto prximos a regio de instabilidade das estrelas ans brancas DA variveis, as chamadas estrelas DAV ou ZZ Ceti. O objetivo determinar os parmetros fundamentais (temperatura efetiva, Teff, acelerao da gravidade, log g, e massa) destas estrelas para verificar quais os parmetros estelares esto envolvidos com o mecanismo de pulsao das estrelas DAV. Ns obtemos, at agora, mais de 120 espectros ticos de estrelas DA. Entre as estrelas selecionadas h 20 estrelas variveis (DAV). Assim, podemos verificar se existem ou no estrelas no variveis dentro da faixa de instabilidade das estrelas ZZ Ceti. Neste trabalho ns apresentamos a determinao dos parmetros atmosfricos (temperatura efetiva, Teff, e acelerao da gravidade, log g) das estrelas ans brancas DA usando os novos modelos de atmosfera ML2/a = 0.6. Estes modelos tm sido utilizados recentemente por fornecerem uma excelente consistncia interna na determinao das temperaturas nas regies do ultra-violeta e tico. Os parmetros atmosfricos so determinados espectroscopicamente atravs da comparao do fluxo de energia das linhas de Balmer (Hb H9) entre os espectros observados e sintticos (gerados pelos modelos de atmosfera). As temperaturas obtidas com os novos modelos so, em geral, menores (~ 1000 K menos) que as temperaturas determinadas anteriormente, com modelos ML1. Os valores de log g no mudaram significativamente (menos de 10%). A faixa de instabilidade das DAVs est entre 11000 e 13000 K, consistente com dados de outros autores.

  3. Surface air radon progeny at So Jos dos Campos, Brazil

    NASA Astrophysics Data System (ADS)

    Silva, A. A.; Claro, L. H.

    Radon is a noble gas naturally occurring in the atmosphere with its progeny. Such progeny can be divided into short- and long-lived daughters. In the winter and spring of 2004 a field campaign at So Jos dos Campos (SJC, 23.1 S, 45.5 W, 600 m above sea level) in Brazil was conducted to determine the outdoor concentration of the short-lived 218Po, 214Pb, and 214Bi and the long-lived 210Po. It was adopted the methodology of measuring the integrated counts of alpha particles from atmospheric aerosols captured on a cellulose membrane filter sampled with outdoor surface air. Integrated counts for the short-lived daughters at 3 different minute-based periods of time were carried out immediately after the end of sampling and applied to a system of 3 equations, whose solution is the short-lived daughters' air concentrations. For 210Po the air concentration was directly released from alpha counts and volume of probed air. Radionuclides' uncertainties were calculated too. Average values of volume activity (2521) (1 standard deviation, sd), (64), and (42) Bq m -3 for 218Po, 214Pb, and 214Bi, respectively, and (8130) ?Bq m -3 for 210Po were found in the campaign. Atmospheric parameters of temperature, humidity, precipitation, pressure, and wind were taken during sampling. Correlation with temperature and humidity were obtained at 95% confidence level.

  4. America Inc.: John Dos Passos'"USA" as Professional Writing Textbook.

    ERIC Educational Resources Information Center

    Di Renzo, Anthony

    While working as a special consultant for General Mills in 1948, John Dos Passos wrote a report explaining the latest scientific research and technological advancements and how the postwar economy was affecting General Mills and the cereal market. General Mills, using a real writer for a corporate freelance, profited from Dos Passos' expertise and…

  5. The Dormancy Regulator DosR Controls Ribosome Stability in Hypoxic Mycobacteria*

    PubMed Central

    Trauner, Andrej; Lougheed, Kathryn E. A.; Bennett, Mark H.; Hingley-Wilson, Suzanne M.; Williams, Huw D.

    2012-01-01

    It is thought that during latent infection, Mycobacterium tuberculosis bacilli are retained within granulomas in a low-oxygen environment. The dormancy survival (Dos) regulon, regulated by the response regulator DosR, appears to be essential for hypoxic survival in M. tuberculosis, but it is not known how the regulon promotes survival. Here we report that mycobacteria, in contrast to enteric bacteria, do not form higher-order structures (e.g. ribosomal dimers) upon entry into stasis. Instead, ribosomes are stabilized in the associated form (70S). Using a strategy incorporating microfluidic, proteomic, and ribosomal profiling techniques to elucidate the fate of mycobacterial ribosomes during hypoxic stasis, we show that the dormancy regulator DosR is required for optimal ribosome stabilization. We present evidence that the majority of this effect is mediated by the DosR-regulated protein MSMEG_3935 (a S30AE domain protein), which is associated with the ribosome under hypoxic conditions. A Δ3935 mutant phenocopies the ΔdosR mutant during hypoxia, and complementation of ΔdosR with the MSMEG_3935 gene leads to complete recovery of dosR mutant phenotypes during hypoxia. We suggest that this protein is named ribosome-associated factor under hypoxia (RafH) and that it is the major factor responsible for DosR-mediated hypoxic survival in mycobacteria. PMID:22544737

  6. 33 CFR 101.505 - Declaration of Security (DoS).

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 1 2012-07-01 2012-07-01 false Declaration of Security (DoS). 101.505 Section 101.505 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY MARITIME SECURITY MARITIME SECURITY: GENERAL Other Provisions § 101.505 Declaration of Security (DoS)....

  7. 33 CFR 101.505 - Declaration of Security (DoS).

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 1 2014-07-01 2014-07-01 false Declaration of Security (DoS). 101.505 Section 101.505 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY MARITIME SECURITY MARITIME SECURITY: GENERAL Other Provisions § 101.505 Declaration of Security (DoS)....

  8. 33 CFR 101.505 - Declaration of Security (DoS).

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Declaration of Security (DoS). 101.505 Section 101.505 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY MARITIME SECURITY MARITIME SECURITY: GENERAL Other Provisions § 101.505 Declaration of Security (DoS)....

  9. 33 CFR 101.505 - Declaration of Security (DoS).

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false Declaration of Security (DoS). 101.505 Section 101.505 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY MARITIME SECURITY MARITIME SECURITY: GENERAL Other Provisions § 101.505 Declaration of Security (DoS)....

  10. 33 CFR 101.505 - Declaration of Security (DoS).

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Declaration of Security (DoS). 101.505 Section 101.505 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY MARITIME SECURITY MARITIME SECURITY: GENERAL Other Provisions § 101.505 Declaration of Security (DoS)....

  11. The Rio dos Sinos watershed: an economic and social space and its interface with environmental status.

    PubMed

    Figueiredo, J A S; Drumm, E; Rodrigues, M A S; Spilki, F R

    2010-12-01

    The Rio dos Sinos watershed is located in the eastern region of the state of Rio Grande do Sul and includes 32 municipalities. These municipalities develop several different economic activities such as farming and livestock along the 190 km length of the Rio dos Sinos, one of the rivers with the worst quality of water in Brazil. The region is also characterised by growing urbanisation and heavy industrialisation. The main economic activity is the leather and footwear industry. This diversified land use puts the Rio dos Sinos watershed at risk of a wide range of potential environmental impacts. The aim of the present article is to discuss the socioeconomic process currently implemented in the Rio dos Sinos watershed and the effect of these human actions on the environmental quality described throughout this special issue of the Brazilian Journal of Biology. PMID:21225153

  12. Measurements of degree of sensitization (DoS) in aluminum alloys using EMAT ultrasound.

    PubMed

    Li, Fang; Xiang, Dan; Qin, Yexian; Pond, Robert B; Slusarski, Kyle

    2011-07-01

    Sensitization in 5XXX aluminum alloys is an insidious problem characterized by the gradual formation and growth of beta phase (Mg(2)Al(3)) at grain boundaries, which increases the susceptibility of alloys to intergranular corrosion (IGC) and intergranular stress-corrosion cracking (IGSCC). The degree of sensitization (DoS) is currently quantified by the ASTM G67 Nitric Acid Mass Loss Test, which is destructive and time consuming. A fast, reliable, and non-destructive method for rapid detection and the assessment of the condition of DoS in AA5XXX aluminum alloys in the field is highly desirable. In this paper, we describe a non-destructive method for measurements of DoS in aluminum alloys with an electromagnetic acoustic transducer (EMAT). AA5083 aluminum alloy samples were sensitized at 100C with processing times varying from 7days to 30days. The DoS of sensitized samples was first quantified with the ASTM 67 test in the laboratory. Both ultrasonic velocity and attenuation in sensitized specimens were then measured using EMAT and the results were correlated with the DoS data. We found that the longitudinal wave velocity was almost a constant, independent of the sensitization, which suggests that the longitudinal wave can be used to determine the sample thickness. The shear wave velocity and especially the shear wave attenuation are sensitive to DoS. Relationships between DoS and the shear velocity, as well as the shear attenuation have been established. Finally, we performed the data mining to evaluate and improve the accuracy in the measurements of DoS in aluminum alloys with EMAT. PMID:21232777

  13. Documenting 35 Years of Land Cover Change: Lago Cachet Dos Drainage, Chile

    NASA Astrophysics Data System (ADS)

    Friesen, B.; Nimick, D.; McGrath, D.; Cole, C.

    2014-12-01

    The U.S. Geological Survey (USGS) Special Applications Science Center is monitoring temporal changes at the Colonia Glacier and Lago Cachet Dos, Northern Patagonia Icefield of southern Chile. This location is one of the newest international sites in the USGS Global Fiducial Program (GFP)—a program which provides systematic monitoring of dynamic and environmentally critical areas with high-resolution imagery (http://gfp.usgs.gov/). In 2008, Lago Cachet Dos began experiencing glacial lake outburst floods (GLOFs) during which the entire pool of water (about 200 million m3) rapidly drains from the lake and flows south-southeast through the Colonia Glacier. These catastrophic events cause massive erosion of lake-bed and valley-fill deposits, and consequent upstream expansion of Lago Cachet Dos towards Lago Cachet Uno. Panchromatic and multispectral images for 1979, 2007, and 2014 highlight the dramatic changes that have occurred at this site over a 35-year period. The lake was smallest in 1979, when the Colonia Glacier was at its maximum thickness and extent during the study period. Between 1979 and 2007, the glacier shrank causing an increase in the surface area of the lake. The size of the lake increased substantially, from 2.98 km2 in 1979 to 4.41 km2 in 2014, primarily due to erosion of valley-fill deposits at its northern edge by the 15 GLOFs that occurred between April 2008 and February 2014. Ongoing studies of the Colonia Glacier and Lago Cachet Dos are focused on providing real-time monitoring of Lago Cachet Dos lake levels, understanding the history of advances and retreats of the Colonia Glacier, and determining the physical mechanisms and hazards associated with the GLOFs that come from Lago Cachet Dos.

  14. Documenting 35 years of land cover change: Lago Cachet Dos drainage, Chile

    USGS Publications Warehouse

    Friesen, Beverly A.; Nimick, David A.; Mcgrath, Daniel; Cole, Christopher J.; Wilson, Earl M.; Noble, Suzanne M.; Fahey, Mark J.; Leidich, Jonathan; O'Kuinghttons Villena, Jorge I.

    2015-01-01

    The U.S. Geological Survey (USGS) Special Applications Science Center is monitoring temporal changes at the Colonia Glacier and Lago Cachet Dos, Northern Patagonia Icefield of southern Chile. This location is one of the newest international sites in the USGS Global Fiducial Program (GFP)a program which provides systematic monitoring of dynamic and environmentally critical areas with high-resolution imagery (http://gfp.usgs.gov/). In 2008, Lago Cachet Dos began experiencing glacial lake outburst floods (GLOFs) during which the entire pool of water (about 200 million cubic meters) rapidly drains from the lake and flows south-southeast through the Colonia Glacier. These catastrophic events cause massive erosion of valley-fill deposits and consequent upstream expansion of Lago Cachet Dos towards Lago Cachet Uno. Panchromatic and multispectral images for 1979, 2007, and 2014 highlight the dramatic changes that have occurred at this site over a 35-year period. The lake was smallest in 1979, when the Colonia Glacier was at its maximum extent during the study period. Between 1979 and 2007, the glacier shrank causing an increase in the surface area of the lake. The size of the lake increased substantially, from 2.98 square kilometers (km2) in 1979 to 4.41 km2in 2014, primarily due to erosion of valley-fill deposits upstream of its northern edge by the 15 GLOFs that occurred between April 2008 and February 2014. Ongoing studies of the Colonia Glacier and Lago Cachet Dos are focused on providing real-time monitoring of Lago Cachet Dos lake levels, understanding the history of advances and retreats of the Colonia Glacier, and determining the physical mechanisms and hazards associated with the GLOFs that come from Lago Cachet Dos.

  15. ACONF DOS

    Energy Science and Technology Software Center (ESTSC)

    2009-03-25

    ACONF is a system which has been developed by Sandia National Laboratories. ACONF is a system for optimizing the interaction between generator, photovoltaic system, batteries, and load in independent non-grid-tied electrical systems. It is primarily used in rural locations where running utility lines proves costly if it is possible at all. It is controlled by an Ampro PC-104 Coremodule 400 controller system. The code for this system is written in the BASIC programming language. Themore »routine contained in this document was written originally by Phil Symons. ACONF is intended to increase the efficiency of freestanding electrical systems to increase battery life and more efficiently use generator fuel.« less

  16. Function, regulation and pathological roles of the Gab/DOS docking proteins

    PubMed Central

    2009-01-01

    Since their discovery a little more than a decade ago, the docking proteins of the Gab/DOS family have emerged as important signalling elements in metazoans. Gab/DOS proteins integrate and amplify signals from a wide variety of sources including growth factor, cytokine and antigen receptors as well as cell adhesion molecules. They also contribute to signal diversification by channelling the information from activated receptors into signalling pathways with distinct biological functions. Recent approaches in protein biochemistry and systems biology have revealed that Gab proteins are subject to complex regulation by feed-forward and feedback phosphorylation events as well as protein-protein interactions. Thus, Gab/DOS docking proteins are at the centre of entire signalling subsystems and fulfil an important if not essential role in many physiological processes. Furthermore, aberrant signalling by Gab proteins has been increasingly linked to human diseases from various forms of neoplasia to Alzheimer's disease. In this review, we provide a detailed overview of the structure, effector functions, regulation and evolution of the Gab/DOS family. We also summarize recent findings implicating Gab proteins, in particular the Gab2 isoform, in leukaemia, solid tumours and other human diseases. PMID:19737390

  17. 33 CFR 106.250 - Declaration of Security (DoS).

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 1 2014-07-01 2014-07-01 false Declaration of Security (DoS). 106.250 Section 106.250 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY MARITIME SECURITY MARINE SECURITY: OUTER CONTINENTAL SHELF (OCS) FACILITIES Outer Continental Shelf...

  18. 33 CFR 106.250 - Declaration of Security (DoS).

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Declaration of Security (DoS). 106.250 Section 106.250 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY MARITIME SECURITY MARINE SECURITY: OUTER CONTINENTAL SHELF (OCS) FACILITIES Outer Continental Shelf...

  19. 33 CFR 106.250 - Declaration of Security (DoS).

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 1 2012-07-01 2012-07-01 false Declaration of Security (DoS). 106.250 Section 106.250 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY MARITIME SECURITY MARINE SECURITY: OUTER CONTINENTAL SHELF (OCS) FACILITIES Outer Continental Shelf...

  20. 33 CFR 106.250 - Declaration of Security (DoS).

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false Declaration of Security (DoS). 106.250 Section 106.250 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY MARITIME SECURITY MARINE SECURITY: OUTER CONTINENTAL SHELF (OCS) FACILITIES Outer Continental Shelf...

  1. 33 CFR 106.250 - Declaration of Security (DoS).

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Declaration of Security (DoS). 106.250 Section 106.250 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY MARITIME SECURITY MARINE SECURITY: OUTER CONTINENTAL SHELF (OCS) FACILITIES Outer Continental Shelf...

  2. MS DOS Tool Software Including Public Domain, Grades 6-12.

    ERIC Educational Resources Information Center

    New York City Board of Education, Brooklyn, NY.

    This curriculum guide is designed to assist teachers and supervisors in introducing middle and high school students to the MS DOS computer and its functional application software in word processing, database management, and spreadsheet analysis. The guide begins by introducing students to computers: when and how they are used, hardware and…

  3. DOS 21: PCDOS 2. 0 support subroutine package for the IBM personal computer

    SciTech Connect

    McGirt, F.

    1984-06-01

    The DOS21 subroutine was developed to provide direct access to selected PCDOS 2.0 system calls from Supersoft FORTRAN. These system calls, which are normally available only from assembly language, allow the programmer greater capability when using Supersoft FORTRAN. This is especially advantageous in the development of programs that interface directly to hardware.

  4. Low-Budget, Cost-Effective OCR: Optical Character Recognition for MS-DOS Micros.

    ERIC Educational Resources Information Center

    Perez, Ernest

    1990-01-01

    Discusses optical character recognition (OCR) for use with MS-DOS microcomputers. Cost effectiveness is considered, three types of software approaches to character recognition are explained, hardware and operation requirements are described, possible library applications are discussed, future OCR developments are suggested, and a list of OCR

  5. MS DOS Tool Software Including Public Domain, Grades 6-12.

    ERIC Educational Resources Information Center

    New York City Board of Education, Brooklyn, NY.

    This curriculum guide is designed to assist teachers and supervisors in introducing middle and high school students to the MS DOS computer and its functional application software in word processing, database management, and spreadsheet analysis. The guide begins by introducing students to computers: when and how they are used, hardware and

  6. Entre Dos Mundos/Between Two Worlds: Youth Violence Prevention for Acculturating Latino Families

    ERIC Educational Resources Information Center

    Smokowski, Paul R.; Bacallao, Martica

    2009-01-01

    Objective: This study evaluated the efficacy of Entre Dos Mundos/Between Two Worlds (EDM) prevention for Latino adolescents. Method: In an experimental trial to compare implementation formats, 41 Latino families were randomly assigned to EDM action-oriented skills training groups, and 47 families were randomly assigned to unstructured EDM support

  7. Content Analysis Schedule for Bilingual Education Programs: Programa en Dos Lenguas.

    ERIC Educational Resources Information Center

    Ludanyi, R. P.; Shore, Marietta Saravia

    This content analysis schedule for the "Programa en Dos Lenguas" of Fort Worth, Texas, presents information on the history, funding, and scope of the project. Included are sociolinguistic process variables such as the native and dominant languages of students and their interaction. Information is provided on staff selection and the linguistic

  8. 33 CFR 105.245 - Declaration of Security (DoS).

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false Declaration of Security (DoS). 105.245 Section 105.245 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY MARITIME SECURITY MARITIME SECURITY: FACILITIES Facility Security Requirements § 105.245 Declaration...

  9. 33 CFR 105.245 - Declaration of Security (DoS).

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Declaration of Security (DoS). 105.245 Section 105.245 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY MARITIME SECURITY MARITIME SECURITY: FACILITIES Facility Security Requirements § 105.245 Declaration...

  10. 33 CFR 104.255 - Declaration of Security (DoS).

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 1 2014-07-01 2014-07-01 false Declaration of Security (DoS). 104.255 Section 104.255 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY MARITIME SECURITY MARITIME SECURITY: VESSELS Vessel Security Requirements § 104.255 Declaration of...

  11. 33 CFR 105.245 - Declaration of Security (DoS).

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Declaration of Security (DoS). 105.245 Section 105.245 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY MARITIME SECURITY MARITIME SECURITY: FACILITIES Facility Security Requirements § 105.245 Declaration...

  12. 33 CFR 104.255 - Declaration of Security (DoS).

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 1 2012-07-01 2012-07-01 false Declaration of Security (DoS). 104.255 Section 104.255 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY MARITIME SECURITY MARITIME SECURITY: VESSELS Vessel Security Requirements § 104.255 Declaration of...

  13. 33 CFR 104.255 - Declaration of Security (DoS).

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false Declaration of Security (DoS). 104.255 Section 104.255 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY MARITIME SECURITY MARITIME SECURITY: VESSELS Vessel Security Requirements § 104.255 Declaration of...

  14. 33 CFR 105.245 - Declaration of Security (DoS).

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 1 2014-07-01 2014-07-01 false Declaration of Security (DoS). 105.245 Section 105.245 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY MARITIME SECURITY MARITIME SECURITY: FACILITIES Facility Security Requirements § 105.245 Declaration...

  15. 33 CFR 104.255 - Declaration of Security (DoS).

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Declaration of Security (DoS). 104.255 Section 104.255 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY MARITIME SECURITY MARITIME SECURITY: VESSELS Vessel Security Requirements § 104.255 Declaration of...

  16. 33 CFR 104.255 - Declaration of Security (DoS).

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Declaration of Security (DoS). 104.255 Section 104.255 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY MARITIME SECURITY MARITIME SECURITY: VESSELS Vessel Security Requirements § 104.255 Declaration of...

  17. 33 CFR 105.245 - Declaration of Security (DoS).

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 1 2012-07-01 2012-07-01 false Declaration of Security (DoS). 105.245 Section 105.245 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY MARITIME SECURITY MARITIME SECURITY: FACILITIES Facility Security Requirements § 105.245 Declaration...

  18. The intraplate Porto dos Gachos seismic zone in the Amazon craton Brazil

    NASA Astrophysics Data System (ADS)

    Barros, Lucas Vieira; Assumpo, Marcelo; Quintero, Ronnie; Caixeta, Daniel

    2009-04-01

    The largest earthquake observed in the stable continental interior of the South American plate occurred in Serra do Tombador, Mato Grosso state Brazil, on January 31, 1955 with a magnitude of 6.2 mb. Since then no other earthquake has been located near the 1955 epicentre. However, in Porto dos Gachos, 100 km northeast of Serra do Tombador, a recurrent seismicity has been observed since 1959. Both Serra do Tombador and Porto dos Gachos are located in the Phanerozoic Parecis basin. Two magnitude 5 earthquakes occurred in Porto dos Gachos, in 1998 and 2005, with intensities up to VI and V, respectively. These two main shocks were followed by aftershock sequences lasting more than three years each. Local seismic stations have been deployed by the Seismological Observatory of the University of Brasilia since 1998 to study the "Porto dos Gachos" seismic zone (PGSZ). A local seismic refraction survey was carried out with two explosions to help define the seismic velocity model. Both the 1998 and 2005 earthquake sequences occurred in the same WSW-ENE oriented fault zone with right-lateral strike-slip mechanisms. The epicentral zone is in the Parecis basin, near its northern border where there are buried grabens, generally trending WNW-ESE, such as the deep Mesoproterozoic Caiabis graben which lies partly beneath the Parecis basin. However, the epicentral distribution indicates that the 1998 and 2005 sequences are related to a N60E fault which probably crosses the entire Caiabis graben. The 1955 earthquake, despite the uncertainty in its epicentre, does not seem to be directly related to any buried graben either. The seismicity in the Porto dos Gachos seismic zone, therefore, is not directly related to rifted crust. The probable direction of the maximum horizontal stress near Porto dos Gachos is roughly E-W, consistent with other focal mechanisms further south in the Pantanal basin and Paraguay, but seems to be different from the NW-SE direction observed further north in the Amazon basin. The recurrent seismicity observed in Porto dos Gachos, and the large 1955 earthquake nearby, make this area of the Parecis basin one of the most important seismic zones of Brazil.

  19. [Recent studies on gas sensors, CooA, FixL, and Dos].

    PubMed

    Yamashita, Taku

    2010-09-01

    Heme-containing proteins, the heme proteins, are known to have physiologic functions in humans, mammalians, fish, plants, and bacteria. For example, hemoglobin and myoglobin, which belong to the globin family, have been studied in terms of their structures and functions with spectroscopic and mutagenic methods. Recently, a new class of heme proteins has been discovered, referred to as gas sensors. These are heme-based sensor proteins that play important roles in transcriptional activation, histidinekinase activities, phosphodiesterase activities, etc. CooA is a CO-sensing transcriptional activator derived from the photosynthetic bacterium Rhodospirillum rubrum. FixL is a rhizobial oxygen sensor protein, and we have targeted Bj FixL derived from Bradyrhizobium japonicum. Dos from Escherichia coli is an oxygen sensor protein, which senses oxygen in the heme-containing domain and induces phosphodiesterase activity in other domains. In previous work, we studied the axial ligands and C-helix of CooA to clarify the activation mechanism. Moreover, FixL and Dos were investigated using time-resolved spectroscopic methods. Whereas FixL has a pentacoordinate heme in the ferrous deoxy form, there are a proximal histidine (His 77) and a distal methionine (Met 95) as axial ligands to coordinate to the heme iron in EcDos. However almost all gas sensors show mono-exponential rebinding (6-7 ps), while EcDosH and full-length Dos show biexponential rebinding (7 ps and 35 ps) on the internal ligand. The results were also supported by molecular dynamic simulation. Here we discuss recent work on gas sensors with implications provided by our research. PMID:20823675

  20. Anlise dos Conceitos Astronmicos Apresentados por Professores de Algumas Escolas Estaduais Brasileiras

    NASA Astrophysics Data System (ADS)

    Voelzke, Marcos Rincon; Gonzaga, Edson Pereira

    2011-12-01

    A razo para o desenvolvimento deste trabalho baseia-se no fato de que muitos professores da Educao Bsica (EB) no lidam com conceitos relacionados astronomia, e quando o fazem eles simplesmente seguem livros didticos que podem conter erros conceituais. Como de conhecimento geral a astronomia um dos contedos a serem ensinados na EB fazendo parte dos Parmetros Curriculares Nacionais e das Propostas Curriculares do Estado de So Paulo, mas um fato, que vrios pesquisadores apontam, a existncia de muitos problemas no ensino da astronomia. Com o propsito de minimizar algumas dessas deficincias foi realizado um trabalho de pesquisa com a utilizao de questionrios pr e ps pesquisa, para tanto foi desenvolvido um Curso de Extenso Universitria para professores da Diretoria de Ensino Regional (DE) que abrange Mau, Ribeiro Pires e Rio Grande da Serra (no Estado de So Paulo) com os seguintes objetivos: levantar concepes alternativas; subsidiar os professores por meio de palestras, debates e workshops, e verificar o sucesso da aprendizagem aps o curso, adotando-se como referncia, para a anlise dos resultados, os dicionrios de Lngua Portuguesa (FERREIRA, 2004) e Enciclopdico de Astronomia e Astronutica (MOUR?O, 1995). Portanto, dezesseis questes foram aplicadas antes e aps o curso, assim pode-se verificar aps a pesquisa que 100,0% dos professores sabiam os nomes das fases da Lua, 97,0% entenderam que o Sistema Solar composto por oito planetas, 78,1% foram capazes de explicar como ocorre um eclipse lunar, um eclipse solar e um solstcio, 72,7% sabiam como explicar a ocorrncia das estaes do ano; 64,5% explicaram corretamente a ocorrncia do equincio, 89,7% foram capazes de definir adequadamente o termo cometa; 63,6% definiram asteride, 54,5% meteoro, 58,1% galxia, e 42,4% planeta. Os resultados obtidos indicam uma aprendizagem significativa por parte dos participantes.

  1. First report of White spot syndrome virus in farmed and wild penaeid shrimp from lagoa dos patos estuary, southern brazil

    PubMed Central

    Cavalli, Lissandra Souto; Romano, Luis Alberto; Marins, Luis Fernando; Abreu, Paulo Csar

    2011-01-01

    In this study, we detected White spot syndrome virus (WSSV) in wild Farfantepenaeus paulensis collected in the Lagoa dos Patos estuary and cultivated Litopenaeus vannamei. This is the first report of WSSV in F. paulensis from Lagoa dos Patos and farmed L. vannamei shrimps in Rio Grande do Sul. PMID:24031739

  2. An alternate hypothesis for the origin of Angra dos Reis - Porphyry, not cumulate

    NASA Technical Reports Server (NTRS)

    Treiman, A. H.

    1989-01-01

    The Angra dos Reis achondrite is a unique meteorite of potentially great importance for understanding the origins of the solar system and of the terrestrial planets. It is proposed that the meteorite, which consists of megacrysts of Al-Ti augite (fassaite) in skeletal or cellular shapes, olivine, and possibly whitlockite in a fine-grained groundmass of the same materials plus spinel, is a porphyritic igneous rock modified by metamorphism. In this interpretation, the megacrysts represent cellular-textured phenocrysts, and the fine-grain groundmass represents crystallized or devitrified magma. Phase equilibria suggest that Angra dos Reis-like compositions could grow phenocrysts of fassaite pyroxene, olivine, and whitlockite. These same compositions could crystallize, without crystal sorting or accumulation, to an almost monomineralic fassaite pyroxenite.

  3. Using satellite images to monitor glacial-lake outburst floods: Lago Cachet Dos drainage, Chile

    USGS Publications Warehouse

    Friesen, Beverly A.; Cole, Christopher J.; Nimick, David A.; Wilson, Earl M.; Fahey, Mark J.; McGrath, Daniel J.; Leidich, Jonathan

    2015-01-01

    During 20082013, 14 GLOFs were released from Lago Cachet Dos and created environmental and safety concerns for downstream residents and to infrastructure. If GLOFs and the consequent headward erosion continue, the moraine that creates Lago Cachet Uno could be destabilized and breached, and the two lakes could merge. If the two lakes become connected, the volume of future GLOFs likely would be greater and thus cause longer and (or) more extensive flooding downstream. Additional GLOFs from Lago Cachet Dos are expected in the future, and continued environmental monitoring could provide an early warning system as well as scientific information that could increase our understanding of GLOFs and their consequences. GLOFs occur in glaciated areas around the world and remote sensing technologies can allow researchers to better understandand potentially predictfuture GLOF events.

  4. Trace Element Distribution Between Olivine and Kirschsteinite in Angra Dos Reis

    NASA Technical Reports Server (NTRS)

    Fittipaldo, M. M.; Jones, R. H.; Shearer, C. K.

    2003-01-01

    The angrites are a small and enigmatic group of basaltic achondrites that possess unique mineralogical and chemical properties. The dominant mineralogy of the seven angrite members (Angra dos Reis, LEW 86010, LEW 87051, Asuka 881371, Sahara 99555, D Orbigny, and a new Moroccan member) is fassaite, olivine, and plagioclase. Angrites display a wide range of thermal histories, with Angra dos Reis (AdoR) exhibiting a cooling history different from that of the rapidly cooled members and from LEW86010, a more slowly cooled member. AdoR could represent either a cumulate or a porphyritic igneous rock that was later altered by metamorphism. We are re-examining the thermal history of AdoR in light of the more recently described angrite members. Our emphasis is a trace element study of low-Ca olivine, which we refer to as olivine, and high-Ca olivine, which we refer to as kirschsteinite, in AdoR.

  5. Perspectivas Futuras para o Observatório do Pico dos Dias

    NASA Astrophysics Data System (ADS)

    Bruch, Albert

    2004-02-01

    Com o Observatório Gemini plenamente operacional e o telescópio SOAR iniciando suas operações em breve, a astronomia observacional brasileira encontra-se no auge de uma transformação profunda que terá um impacto grave no Observatório do Pico dos Dias - OPD. Refletimos aqui sobre a natureza desse impacto e estratégias para manter a competitividade do OPD. Não queremos apresentar receitas prontas, mas idéias que poderão servir como base de discussão sobre o uso inteligente dos telescópios do OPD como parte do conjunto de instrumentos disponíveis à comunidade astronômica brasileira.

  6. Effect of modulation frequency bandwidth on measurement accuracy and precision for digital diffuse optical spectroscopy (dDOS)

    NASA Astrophysics Data System (ADS)

    Jung, Justin; Istfan, Raeef; Roblyer, Darren

    2014-03-01

    Near-infrared (NIR) frequency-domain Diffuse Optical Spectroscopy (DOS) is an emerging technology with a growing number of potential clinical applications. In an effort to reduce DOS system complexity and improve portability, we recently demonstrated a direct digital sampling method that utilizes digital signal generation and detection as a replacement for more traditional analog methods. In our technique, a fast analog-to-digital converter (ADC) samples the detected time-domain radio frequency (RF) waveforms at each modulation frequency in a broad-bandwidth sweep (50- 300MHz). While we have shown this method provides comparable results to other DOS technologies, the process is data intensive as digital samples must be stored and processed for each modulation frequency and wavelength. We explore here the effect of reducing the modulation frequency bandwidth on the accuracy and precision of extracted optical properties. To accomplish this, the performance of the digital DOS (dDOS) system was compared to a gold standard network analyzer based DOS system. With a starting frequency of 50MHz, the input signal of the dDOS system was swept to 100, 150, 250, or 300MHz in 4MHz increments and results were compared to full 50-300MHz networkanalyzer DOS measurements. The average errors in extracted μa and μs' with dDOS were lowest for the full 50-300MHz sweep (less than 3%) and were within 3.8% for frequency bandwidths as narrow as 50-150MHz. The errors increased to as much as 9.0% when a bandwidth of 50-100MHz was tested. These results demonstrate the possibility for reduced data collection with dDOS without critical compensation of optical property extraction.

  7. A Comparison of Three LISP Interpreters for MS-DOS-Based Microcomputers

    PubMed Central

    Kahane, Stephen N.; Johannes, Richard S.

    1985-01-01

    We report a comparison of three commercially available LISP interpreters running on MS-DOS-based microcomputers. Marked differences were found between the different products' memory addressing abilities, error handling and debugging facilities. Editing tools, tutoring environments, windowing, graphic capabilities, operating system and port call facilities are also contrasted. Speed was tested via a group of LISP functions (benchmarks) that attempt to isolate list manipulation, iteration, function calling, recursion and mathematical calculation performance.

  8. FlexyDos3D: a deformable anthropomorphic 3D radiation dosimeter: radiation properties

    NASA Astrophysics Data System (ADS)

    De Deene, Y.; Skyt, P. S.; Hil, R.; Booth, J. T.

    2015-02-01

    Three dimensional radiation dosimetry has received growing interest with the implementation of highly conformal radiotherapy treatments. The radiotherapy community faces new challenges with the commissioning of image guided and image gated radiotherapy treatments (IGRT) and deformable image registration software. A new three dimensional anthropomorphically shaped flexible dosimeter, further called FlexyDos3D, has been constructed and a new fast optical scanning method has been implemented that enables scanning of irregular shaped dosimeters. The FlexyDos3D phantom can be actuated and deformed during the actual treatment. FlexyDos3D offers the additional advantage that it is easy to fabricate, is non-toxic and can be molded in an arbitrary shape with high geometrical precision. The dosimeter formulation has been optimized in terms of dose sensitivity. The influence of the casting material and oxygen concentration has also been investigated. The radiophysical properties of this new dosimeter are discussed including stability, spatial integrity, temperature dependence of the dosimeter during radiation, readout and storage, dose rate dependence and tissue equivalence. The first authors Y De Deene and P S Skyt made an equivalent contribution to the experimental work presented in this paper.

  9. A Influncia da Escola e da Mdia na Obteno dos Conhecimentos Astronmicos

    NASA Astrophysics Data System (ADS)

    da Cunha, W. S.; Voelzke, M. R.; Amaral, L. H.

    2006-08-01

    O universo em que vivemos possui segredos jamais imaginados pelo homem, fruto da pequena proporo que ocupamos diante de um cosmos infinito. A astronomia funciona como um instrumento que sacia a sede humana em desvendar esses segredos, estudando as galxias, quasares, pulsares alm da existncia de todos os elementos que preenchem o espao csmico, o vcuo, no mais vazio como se pensou em outros tempos. A mdia explora esse campo de forma mstica e tambm cientfica. A difuso adequada e dentro dos padres educacionais vigentes, de conceitos astronmicos, se faz necessria, devido sua presena nos contedos escolares, centros de cincia e na mdia, de modo geral. A reforma do Currculo Bsico da Escola Pblica da maioria dos Estados brasileiros introduziu conceitos astronmicos desde a pr-escola at o Ensino Mdio. Num estudo realizado com 1.032 alunos do Ensino Mdio de seis escolas estaduais, revelou-se atravs da aplicao de um questionrio que abordava conheciment os bsicos em astronomia, como estes foram adquiridos e qual era a infra-estrutura oferecida pela escola: para 66,2% dos entrevistados o professor j fez alguma apresentao a respeito de astronomia. O presente estudo revelou tambm que 44,5% dos alunos entrevistados adquiriram seus conhecimentos astronmicos na escola, 28,1% atravs da televiso e 27,4% afirmaram que seus conhecimentos foram obtidos atravs de outros tipos de mdia (internet, filmes e revistas). Embora o estudo revele claramente que h certo equilbrio na forma em que os alunos obtiveram seus conhecimentos astronmicos, a mdia ainda explora e muitas vezes desperta o interesse pela astronomia com assuntos que no fazem parte de nosso cotidiano como, por exemplo, o homem na Lua, os projetos espaciais e a primeira viagem de um astronauta brasileiro no espao. Porm, em certos casos, a mdia pode promover conhecimentos incompletos ou mesmo equivocados sobre os conceitos que envolvam a astronomia, como por exemplo a propagao do som no vcuo observado na maioria dos filmes de f ico cientfica ou da existncia das estaes do ano em funo da distncia da Terra ao Sol, em conformidade com o questionrio aplicado.

  10. DoS detection in IEEE 802.11 with the presence of hidden nodes.

    PubMed

    Soryal, Joseph; Liu, Xijie; Saadawi, Tarek

    2014-07-01

    The paper presents a novel technique to detect Denial of Service (DoS) attacks applied by misbehaving nodes in wireless networks with the presence of hidden nodes employing the widely used IEEE 802.11 Distributed Coordination Function (DCF) protocols described in the IEEE standard [1]. Attacker nodes alter the IEEE 802.11 DCF firmware to illicitly capture the channel via elevating the probability of the average number of packets transmitted successfully using up the bandwidth share of the innocent nodes that follow the protocol standards. We obtained the theoretical network throughput by solving two-dimensional Markov Chain model as described by Bianchi [2], and Liu and Saadawi [3] to determine the channel capacity. We validated the results obtained via the theoretical computations with the results obtained by OPNET simulator [4] to define the baseline for the average attainable throughput in the channel under standard conditions where all nodes follow the standards. The main goal of the DoS attacker is to prevent the innocent nodes from accessing the channel and by capturing the channel's bandwidth. In addition, the attacker strives to appear as an innocent node that follows the standards. The protocol resides in every node to enable each node to police other nodes in its immediate wireless coverage area. All innocent nodes are able to detect and identify the DoS attacker in its wireless coverage area. We applied the protocol to two Physical Layer technologies: Direct Sequence Spread Spectrum (DSSS) and Frequency Hopping Spread Spectrum (FHSS) and the results are presented to validate the algorithm. PMID:25685510

  11. Studies of Brazilian meteorites. III - Origin and history of the Angra dos Reis achondrite

    NASA Technical Reports Server (NTRS)

    Prinz, M.; Keil, K.; Hlava, P. F.; Berkley, J. L.; Gomes, C. B.; Curvello, W. S.

    1977-01-01

    The mineral composition of the Angra dos Reis meteorite, which fell in 1869, is described. This achondrite contains phases reported in a meteorite for the first time. Petrofabric analysis shows that fassaite has a preferred orientation and lineation, which is interpreted as being due to cumulus processes, possibly the effect of post-depositional magmatic current flow or laminar flow of a crystalline mush. The mineral chemistry indicates crystallization from a highly silica-undersaturated melt at low pressure. Several aspects of the mineral composition are discussed with reference to the implications of crystallization conditions.

  12. Use of Remote Sensing and Local Knowledge for Geoconservation of Regiao dos Lagos, Brazil

    NASA Astrophysics Data System (ADS)

    Avelar, S.; Vasconcelos, G.; Mansur, K. L.; Anjos, S. C.

    2013-12-01

    A series of lagoons can be found along the coastline of Rio de Janeiro, in the so-called Regiao dos Lagos. The lagoons differ in size, physicochemical, sedimentological and biological characteristics. Rare examples of litifying microbialites that produce stromatolites, the oldest fossils on Earth, can be found living in this lagoon system. The occurrence of stromatolites in the region is of great scientific interest because it enables the study of possible analogues of the earliest life on Earth. However, this region has been suffering from intense human activities and degradations. Geoconservation planning requires an assessment of the characteristics of the region and its potential threats. The primary goal of this study is to assess physical environmental changes and anthropogenic impacts over the last four decades in Regiao dos Lagos. Using a broad integrative assessment combining remote sensing, GIS, field studies and local knowledge of communities, land-cover and land-use classes were identified, as well as the main human activities impacting the environment. The seasonal and weekend tourism and urban sprawl in this coastal area of Rio de Janeiro triggers the occupation of new areas and the removal of natural vegetation, especially on lagoon margins. This disorderly occupation by an ever increasing population, with both legal and illegal constructions and the subsequent overload of the local infrastructure, e.g. increase of electrical energy consumption, volume of vehicles, pollution in air, water and soil and problems with water supply and wastewater treatment, are hastening the gradual degradation of the lake ecosystem. The main driving forces to environmental changes over the last four decades in Regiao dos Lagos were the change of dense vegetation, saline and bare soil classes into built-up areas, adding to the poor waste treatment and inadequate sewage disposal. This analysis provides a basis for a better control of anthropogenic impacts and geoconservation activities of the ';Geopark Costoes e Lagunas do Rio de Janeiro', which includes Regiao dos Lagos. The goals of the geopark are the conservation of a healthy environment, education in the Earth sciences and the fostering of local, sustainable economic development. It is essential that the local government and population support the geoconservation work and are involved in the planning and implementation of activities. The local knowledge about natural, cultural and economical particularities of the region and awareness on environmental issues are taken into consideration, in order to assist the development of specific geoconservation activities according to community needs.

  13. Age and isotopic relationships among the angrites Lewis Cliff 86010 and Angra dos Reis

    SciTech Connect

    Lugmair, G.W. ); Galer, S.J.G. Max-Planck-Inst. fuer Chemie, Mainz )

    1992-04-01

    Results of a wide-ranging isotopic investigation of the unique Antarctican angrite LEW-86010 (LEW) are presented, together with a reassessment of the type angrite Angra dos Reis (ADOR). The principal objectives of this study are to obtain precise radiometric ages, initial Sr isotopic compositions, and to search for the erstwhile presence of the short-lived nuclei {sup 146}Sm and {sup 26}Al via their daughter products. The isotopic compositions of Sm, U, Ca, and Ti were also measured. This allows a detailed appraisal to be made of the relations between, and the genealogy of, these two angrites.

  14. Volcanic and structural controls of mineralization in the Dos Cabezas Mountains of southeastern Arizona

    SciTech Connect

    Drewes, H.; Klein, D.P.; Birmingham, S.D.

    1988-01-01

    A combination of geophysical, geochemical, and geological features suggests that a central part of the Dos Cabezas Mountains probably has considerable potential for blind deposits, chiefly base metals. The area exposes the root zone of a Paleocene( ) volcanic complex and its underlying granitic stocks, which were emplaced next to a major northwest-trending, much reactivated fault zone. The new data, combined with the knowledge of past mining activity in the area, lead them to propose several exploration targets that may lead to ore bodies in breccia pipes along the base of the volcanic pile and along a possible concealed fault or caldera margin.

  15. OptaDOS: A tool for obtaining density of states, core-level and optical spectra from electronic structure codes

    NASA Astrophysics Data System (ADS)

    Morris, Andrew J.; Nicholls, Rebecca J.; Pickard, Chris J.; Yates, Jonathan R.

    2014-05-01

    We present OptaDOS, a program for calculating core-electron and low-loss electron energy loss spectra (EELS) and optical spectra along with total-, projected- and joint-density of electronic states (DOS) from single-particle eigenenergies and dipole transition coefficients. Energy-loss spectroscopy is an important tool for probing bonding within a material. Interpreting these spectra can be aided by first principles calculations. The spectra are generated from the eigenenergies through integration over the Brillouin zone. An important feature of this code is that this integration is performed using a choice of adaptive or linear extrapolation broadening methods which we show produces higher accuracy spectra than standard fixed-width Gaussian broadening. OptaDOS may be straightforwardly interfaced to any electronic structure code. OptaDOS is freely available under the GNU General Public licence from http://www.optados.org.

  16. A new species and new records of gripopterygidae (plecoptera) from the Serra dos Orgos, Rio de Janeiro State, Brazil.

    PubMed

    Avelino-Capistrano, Fernanda; Nessimiani, Jorge Luiz

    2013-01-01

    A new species of the stonefly family Gripopterygidae, Tupiperla barbosai sp. nov. is described from the Serra dos Orgos, Rio de Janeiro State, Brazil. Additionally, two new species records are presented from the Serra dos Orgos, Tupiperla reichardti Froehlich and Guaranyperla guapiara Froehlich, the latter a new record for Rio de Janeiro State. A review of the species of Gripopterygidae from these mountains is presented including distributional data and taxonomic remarks. PMID:25250446

  17. Using 4DOS Batch Files To Create an Infrastructure That Makes It Easy for Students To Create and Maintain HTML Web Pages.

    ERIC Educational Resources Information Center

    Snyder, Robin M.

    This paper describes the use of simple 4DOS batch files to automate the creation and maintenance of an infrastructure to assist students in creating and maintaining HTML World Wide Web pages. Background is provided on Web pages, DOS, 4DOS, and batch files. The assumptions made in creating the infrastructure are summarized, and program statements

  18. Reproductive Dynamics of Sterna hirundinacea Lesson, 1831 in Ilha dos Cardos, Santa Catarina, Brazil

    PubMed Central

    Fracasso, Hlio Augusto Alves; Branco, Joaquim Olinto; Efe, Mrcio Amorim

    2014-01-01

    In this work, we intend to describe the reproductive dynamics of Sterna hirundinacea in an island from South Brazil. We studied the reproductive biology of this species in its natural environment and provide data on their growth, survival, and reproductive success in Ilha dos Cardos, Santa Catarina, South Brazil. Samplings were carried out daily on the island throughout the reproductive seasons of 2003, 2005, and 2006 and the different stages of development of the chicks were characterized according to age, length of the beak, and plumage characteristics. We provide a basic equation Lm = 167.91?(1 ? e?0.062t?(?0.23)) to determine the approximate age of individuals using their body mass. The main cause of chick mortality on the island was natural (63.17% in 2003, 81.41% in 2005, and 79.96% in 2006), whereas predation contributed to mortality in a proportion of 38.83% in 2003, 18.59% in 2005, and 20.04% in 2006. The absence in the area of the chicks' main predator, Kelp gull (Larus dominicanus), the large number of chicks that reached the final stages of development, and their reproductive success demonstrate that Ilha dos Cardos is an important breeding site for the species in southern Brazil. PMID:24977100

  19. RighTime: A real time clock correcting program for MS-DOS-based computer systems

    NASA Technical Reports Server (NTRS)

    Becker, G. Thomas

    1993-01-01

    A computer program is described which effectively eliminates the misgivings of the DOS system clock in PC/AT-class computers. RighTime is a small, sophisticated memory-resident program that automatically corrects both the DOS system clock and the hardware 'CMOS' real time clock (RTC) in real time. RighTime learns what corrections are required without operator interaction beyond the occasional accurate time set. Both warm (power on) and cool (power off) errors are corrected, usually yielding better than one part per million accuracy in the typical desktop computer with no additional hardware, and RighTime increases the system clock resolution from approximately 0.0549 second to 0.01 second. Program tools are also available which allow visualization of RighTime's actions, verification of its performance, display of its history log, and which provide data for graphing of the system clock behavior. The program has found application in a wide variety of industries, including astronomy, satellite tracking, communications, broadcasting, transportation, public utilities, manufacturing, medicine, and the military.

  20. Electron spin resonance dating of megafauna from Lagoa dos Porcos, Piau, Brazil.

    PubMed

    Kinoshita, Angela; Mayer, Elver; Ribau Mendes, Vincius; Figueiredo, Ana Maria G; Baffa, Oswaldo

    2014-06-01

    Excavations performed at Lagoa dos Porcos site revealed a vast amount of extinct mammal fossil remains, becoming one of the richest palaeontological occurrences in the Serra da Capivara National Park region, a UNESCO World Heritage. Although anatomic and taxonomic aspects of extinct Quaternary mammals are relatively well known, chronologic information for deposits is rare. In this context, electron spin resonance (ESR) dating of megafauna samples provides important information for establishing a chronological background. This work presents the ESR dating of two teeth, one of Gomphotheriidae and other of Toxodontinae. Dose-response curves of each sample were constructed using spectra acquired with a JEOL FA-200 X-Band spectrometer resulting in equivalent dose (De) of 220 40 Gy and 39 2 Gy for Toxodontinae and Gomphotheriidae tooth, respectively. The conversion of De in age was made using ROSY ESR dating software resulting in 26 4 and 22 3 ka. These results place Lagoa dos Porcos fossil assemblage within the Late Pleistocene. These dates overlap with a period of abrupt increase in rainfall in northeast Brazil, and it is possible that this environmental change is related to the formation of this deposit. PMID:24891406

  1. Perfil de temperatura dos funis magnetosfricos de estrelas T Tauri com aquecimento alfvnico

    NASA Astrophysics Data System (ADS)

    Vasconcelos, M. J.

    2003-08-01

    Estrelas T Tauri Clssicas so objetos jovens circundados por discos de gs e poeira e que apresentam uma intensa atividade magntica. Seu espectro mostra linhas de emisso alargadas que so razoavelmente reproduzidas nos modelos de acreso magnetosfrica. No entanto, o perfil de temperatura dos funis magnticos desconhecido. Aquecimento magntico compressional e difuso ambipolar foram considerados para estas estruturas, porm as temperaturas obtidas no so suficientes para explicar as observaes. Neste trabalho, examinamos o aquecimento gerado pelo amortecimento de ondas Alfvn atravs de quatro mecanismos, os amortecimentos no-linear, turbulento, viscoso-resistivo e colisional como funo da freqncia da onda. Inicialmente, a temperatura ajustada para reproduzir as observaes e o grau de turbulncia requerido para que o mecanismo seja vivel calculado. Os resultados mostram que este compatvel com os dados observacionais. Apresentam-se, tambm, resultados preliminares do clculo auto-consistente do perfil de temperatura dos funis, levando-se em conta fontes de aquecimento Alfvnica e fontes de resfriamento.

  2. Quality control and assurance for validation of DOS/I measurements

    NASA Astrophysics Data System (ADS)

    Cerussi, Albert; Durkin, Amanda; Kwong, Richard; Quang, Timothy; Hill, Brian; Tromberg, Bruce J.; MacKinnon, Nick; Mantulin, William W.

    2010-02-01

    Ongoing multi-center clinical trials are crucial for Biophotonics to gain acceptance in medical imaging. In these trials, quality control (QC) and assurance (QA) are key to success and provide "data insurance". Quality control and assurance deal with standardization, validation, and compliance of procedures, materials and instrumentation. Specifically, QC/QA involves systematic assessment of testing materials, instrumentation performance, standard operating procedures, data logging, analysis, and reporting. QC and QA are important for FDA accreditation and acceptance by the clinical community. Our Biophotonics research in the Network for Translational Research in Optical Imaging (NTROI) program for breast cancer characterization focuses on QA/QC issues primarily related to the broadband Diffuse Optical Spectroscopy and Imaging (DOS/I) instrumentation, because this is an emerging technology with limited standardized QC/QA in place. In the multi-center trial environment, we implement QA/QC procedures: 1. Standardize and validate calibration standards and procedures. (DOS/I technology requires both frequency domain and spectral calibration procedures using tissue simulating phantoms and reflectance standards, respectively.) 2. Standardize and validate data acquisition, processing and visualization (optimize instrument software-EZDOS; centralize data processing) 3. Monitor, catalog and maintain instrument performance (document performance; modularize maintenance; integrate new technology) 4. Standardize and coordinate trial data entry (from individual sites) into centralized database 5. Monitor, audit and communicate all research procedures (database, teleconferences, training sessions) between participants ensuring "calibration". This manuscript describes our ongoing efforts, successes and challenges implementing these strategies.

  3. Crystal Structures of the Response Regulator DosR From Mycobacterium Tuberculosis Suggest a Helix Rearrangement Mechanism for Phosphorylation Activation

    SciTech Connect

    Wisedchaisri, G.; Wu, M.; Sherman, D.R.; Hol, W.G.J.

    2009-05-26

    The response regulator DosR is essential for promoting long-term survival of Mycobacterium tuberculosis under low oxygen conditions in a dormant state and may be responsible for latent tuberculosis in one-third of the world's population. Here, we report crystal structures of full-length unphosphorylated DosR at 2.2 {angstrom} resolution and its C-terminal DNA-binding domain at 1.7 {angstrom} resolution. The full-length DosR structure reveals several features never seen before in other response regulators. The N-terminal domain of the full-length DosR structure has an unexpected ({beta}{alpha}){sub 4} topology instead of the canonical ({beta}{alpha}){sub 5} fold observed in other response regulators. The linker region adopts a unique conformation that contains two helices forming a four-helix bundle with two helices from another subunit, resulting in dimer formation. The C-terminal domain in the full-length DosR structure displays a novel location of helix {alpha}10, which allows Gln199 to interact with the catalytic Asp54 residue of the N-terminal domain. In contrast, the structure of the DosR C-terminal domain alone displays a remarkable unstructured conformation for helix {alpha}10 residues, different from the well-defined helical conformations in all other known structures, indicating considerable flexibility within the C-terminal domain. Our structures suggest a mode of DosR activation by phosphorylation via a helix rearrangement mechanism.

  4. An MS-DOS-based program for analyzing plutonium gamma-ray spectra

    SciTech Connect

    Ruhter, W.D.; Buckley, W.M.

    1989-09-07

    A plutonium gamma-ray analysis system that operates on MS-DOS-based computers has been developed for the International Atomic Energy Agency (IAEA) to perform in-field analysis of plutonium gamma-ray spectra for plutonium isotopics. The program titled IAEAPU consists of three separate applications: a data-transfer application for transferring spectral data from a CICERO multichannel analyzer to a binary data file, a data-analysis application to analyze plutonium gamma-ray spectra, for plutonium isotopic ratios and weight percents of total plutonium, and a data-quality assurance application to check spectral data for proper data-acquisition setup and performance. Volume 3 contains the software listings for these applications.

  5. On securing wireless sensor network--novel authentication scheme against DOS attacks.

    PubMed

    Raja, K Nirmal; Beno, M Marsaline

    2014-10-01

    Wireless sensor networks are generally deployed for collecting data from various environments. Several applications specific sensor network cryptography algorithms have been proposed in research. However WSN's has many constrictions, including low computation capability, less memory, limited energy resources, vulnerability to physical capture, which enforce unique security challenges needs to make a lot of improvements. This paper presents a novel security mechanism and algorithm for wireless sensor network security and also an application of this algorithm. The proposed scheme is given to strong authentication against Denial of Service Attacks (DOS). The scheme is simulated using network simulator2 (NS2). Then this scheme is analyzed based on the network packet delivery ratio and found that throughput has improved. PMID:25106827

  6. The Secret List of Dos and Don'ts for Filmmaking

    NASA Astrophysics Data System (ADS)

    Kramer, N.

    2012-12-01

    Science is a massive black box to billions of people who walk the streets. However, the process of filmmaking can be equally as mystifying. As with the development of many scientific experiments, the process starts on a napkin at a restaurantbut then what? The road to scientific publication is propelled by a canonical list of several dos and don't that fit most situations. An equally useful list exists for up-and-coming producers. The list streamlines efforts, optimizes your use of the tools at your fingertips and enhances impact. Many fundamentals can be learned from books, but during this talk we will project and discuss several examples of best practices, from honing a story, to identifying audience appeal, filming, editing and the secrets of inexpensively acquiring expert help. Whether your goal is a two-minute webisode or a 90 minute documentary, these time-tested practices, with a little awareness, can give life to your films.;

  7. The dos and don'ts of neuropsychological assessment in epilepsy.

    PubMed

    Baker, Gus A; Goldstein, Laura H

    2004-02-01

    Neuropsychologists have a significant role in the assessment, treatment, and rehabilitation of people with epilepsy. This includes providing an assessment of an individual's cognitive strengths and weaknesses with respect to being a candidate for the surgery program, detailing intellectual and memory impairments as part of a rehabilitation service, and documenting specific antiepileptic drug effects as part of routine clinical management. Each of these specific roles requires careful consideration with respect to the potential pitfalls they can present to the neuropsychologist. In this article, we have attempted to identify the most obvious "dos and don'ts" in the neuropsychological assessment of people with epilepsy. These range from issues relating to the reliance of measures, to the failure to document patients' backgrounds, to the importance of considering the psychometric tests that we use. We have attempted to emphasize the importance or value of a well-conducted neuropsychological assessment to the management of the person with epilepsy. PMID:14725850

  8. An MS-DOS-based program for analyzing plutonium gamma-ray spectra

    SciTech Connect

    Ruhter, W.D.; Buckley, W.M.

    1989-09-07

    A plutonium gamma-ray analysis system that operates on MS-DOS-based computers has been developed for the International Atomic Energy Agency (IAEA) to perform in-field analysis of plutonium gamma-ray spectra for plutonium isotopics. The program titled IAEAPU consists of three separate applications: (1) a data-transfer application for transferring spectral data from a CICERO multichannel analyzer to a binary data file, (2) a data-analysis application to analyze plutonium gamma-ray spectra for plutonium isotopic ratios and weight percents of total plutonium, (3) and a data-quality assurance application to check spectral data for proper data-acquisition setup and performance. Volume 2 describes the operations of these applications and the installation and maintenance of the software.

  9. Age and isotopic relationships among the angrites Lewis Cliff 86010 and Angra dos Reis

    NASA Technical Reports Server (NTRS)

    Lugmair, G. W.; Galer, S. J. G.

    1992-01-01

    The paper presents results of a wide-ranging isotopic investigation of the the Antarctic angrite LEW-86010 (LEW), and reassesses the type angrite Angra dos Reis (ADOR) in order to obtain precise radiometric ages and initial Sr isotopic compositions, and to search for the erstwhile presence of the short-lived nuclei Sm-146 and Al-26 via their daughter products. The isotopic compositions of Sm, U, Ca, and Ti were measured to allow a detailed appraisal to be made of the relations between, and the geneology of, these two angrites. LEW proves to be severely contaminated with modern terrestrial Pb, which is shown to result from terrestrial weathering. Concordant Pb-Pb model ages of pyroxene separates are obtained; uranium isotopic compositions are normal within error. Overall, striking age and isotopic similarities between LEW and ADOR were found, suggesting almost simultaneous production on the same asteroid, even though recent experimental studies imply that the two are not comagmatic.

  10. Estudio dinámico de un potencial perturbador dependiente de dos parámetros

    NASA Astrophysics Data System (ADS)

    Miloni, O.; Brunini, A.

    El objeto del presente trabajo consiste en el estudio dinámico de un sistema dinámico caracterizado por la función hamiltoniana correspondiente a un satélite planetario perturbado por la acción del Sol y del achatamiento del planeta madre. Cuando dicha Hamiltoniana se promedia respecto de los términos de corto período, esta queda con dos grados de libertad, y su estudio puede ser realizado con las herramientas clásicas de la dinámica no-lineal. Se tratará de determinar regiones regulares y caóticas de movimiento. En el caso de estas últimas, es de particular interés la determinación de su orígen.

  11. Measured oxygen fugacities of the Angra dos Reis achondrite as a function of temperature

    USGS Publications Warehouse

    Brett, R.; Stephen, Huebner J.; Sato, M.

    1977-01-01

    Measurements of the oxygen fugacity (f{hook}O2) as a function of temperature (T) were made on an interior bulk sample of the cumulate achondrite, Angra dos Reis. Data clustered between the f{hook}O2-T relationship of the iron-wu??stite assemblage and 1.2 log atm units above iron-wu??stite. Interpretation of the data indicates that, throughout most of the cooling history of the meteorite, f{hook}O2 values were defined by equilibria involving iron-bearing species at values close to the f{hook}O2 of the assemblage iron-wu??stite. Measured f{hook}O2 data are compatible with crystallization and cooling at pressures greater than 50 bars. ?? 1977.

  12. Development and evaluation of a driving observation schedule (DOS) to study everyday driving performance of older drivers.

    PubMed

    Vlahodimitrakou, Z; Charlton, J L; Langford, J; Koppel, S; Di Stefano, M; Macdonald, W; Mazer, B; Gelinas, I; Vrkljan, B; Porter, M M; Smith, G A; Cull, A W; Marshall, S

    2013-12-01

    This paper describes the development and evaluation of an on-road procedure, the Driving Observation Schedule (DOS), for monitoring individual driving behavior. DOS was developed for use in the Candrive/Ozcandrive five-year prospective study of older drivers. Key features included observations in drivers' own vehicles, in familiar environments chosen by the driver, with start/end points at their own homes. Participants were 33 drivers aged 75+ years, who drove their selected route with observations recorded during intersection negotiation, lane-changing, merging, low speed maneuvers and maneuver-free driving. Driving behaviors were scored by a specialist occupational therapy driving assessor and another trained observer. Drivers also completed a post-drive survey about the acceptability of DOS. Vehicle position, speed, distance and specific roadways traveled were recorded by an in-vehicle device installed in the participant's vehicle; this device was also used to monitor participants' driving over several months, allowing comparison of DOS trips with their everyday driving. Inter-rater reliability and DOS feasibility, acceptability and ecological validity are reported here. On average, drivers completed the DOS trip in 30.48min (SD=7.99). Inter-rater reliability measures indicated strong agreement between the trained and the expert observers: intra-class correlations (ICC)=0.905, CI 95% 0.747-0.965, p<0.0001; Pearson product correlation, r (18)=.83, p<0.05. Standard error of the measurement (SEM), method error (ME) and coefficient of variation (CV) measures were consistently small (3.0, 2.9 & 3.3%, respectively). Most participants reported being 'completely at ease' (82%) with the driving task and 'highly familiar with the route' (97%). Vehicle data showed that DOS trips were similar to participants' everyday driving trips in roads used, roadway speed limits, drivers' average speed and speed limit compliance. In summary, preliminary findings suggest that DOS can be scored reliably, is of feasible duration, is acceptable to drivers and representative of everyday driving. Pending further research with a larger sample and other observers, DOS holds promise as a means of quantifying and monitoring changes in older drivers' performance in environments typical of their everyday driving. PMID:23639887

  13. Groundwater radon, radium and uranium concentrations in Regio dos Lagos, Rio de Janeiro State, Brazil.

    PubMed

    Almeida, R M R; Lauria, D C; Ferreira, A C; Sracek, O

    2004-01-01

    Ground water from Regio dos Lagos, a coastal area of Rio de Janeiro state, was analysed for (226)Ra, (228)Ra, (222)Rn, (238)U, major ion concentrations, and physico-chemical parameters were also measured. Concentrations values ranged from <0.002 to 0.492 Bq l(-1) for (226)Ra, from <0.01 to 1.50 Bq l(-1) for (228)Ra and from < 1.0 x 10(-4) to 8.0 x 10(-2) Bq l(-1) for (238)U. Detectable (222)Rn concentrations (>3 Bq l(-1)) were found only in two samples. The spatial distribution of Ra concentration delineated one distinct area and some hot spots with high Ra concentration. Low pH value is the most important water parameter linked to high radium concentration. This is probably related to limited adsorption of radium on soil ferric oxides and hydroxides at low pH range. There was a significant correlation between uranium concentrations and electrical conductivity values, and also between uranium concentrations and concentrations of Ca, Mg, Na, K, and Cl, indicating sea water impact. Uranium concentrations were lower than maximum contaminant level for drinking water, whereas 17 out of the 88 ground water samples had levels of radium that exceeded the maximum contaminant level for tap water. The total annual effective dose for adult due to the water consumption reaches values up to 0.8 mSv. PMID:15050363

  14. Creating a Global Fiducials Program (GFP) Site: Lago Cachet Dos example in Chile

    NASA Astrophysics Data System (ADS)

    Friesen, B. A.; Nimick, D. A.; Wilson, E. M.

    2012-12-01

    The USGS has been acquiring remotely sensed imagery from all over the world, collecting thousands of images at more than 200 sites, and creating Literal Image Derived Products (LIDPs) as part of the Global Fiducials Program (GFP). The GFP program enables scientists to use these images to study our rapidly changing planet at carefully selected locations around the world. New GFP Sites are created and added each year. Researchers at the University of Alaska, for instance, added areas susceptible to coastal erosion for monitoring the long-term effects of high tides and storms. This presentation will guide you through the process of creating a new GFP site for your area of interest. We will describe the components of the GFP and its archive, the Global Fiducials Library. The Global Fiducials Program—Initial Site Proposal form will be presented and we will show you how to complete each component in order to propose a new site. Lago Cachet Dos, a glacier-dammed lake in southern Chile, is currently being proposed as a new GFP site and will be used as the example for this exercise. In addition, USGS web sites will be used to illustrate how a long-term imagery record can tell a story and to demonstrate viewing and downloading the type of data that will be available online and free of charge through the GFP.

  15. Open Cluster Radial Velocity determination from observations at Observatório Pico Dos Dias

    NASA Astrophysics Data System (ADS)

    Faria, M. A. F.; Monteiro, H.; Dias, W. S.; Lépine, J. R. D.

    2014-10-01

    In studies of the dynamics of the Galactic disk, such as the determination of the speed of the spiral pattern and the permanence of stars in the spiral arms, it is crucial to know orbits obtained from proper motions, radial velocities and the potential of the Galaxy. Aiming to improve the statistics of our catalog of open clusters, maintained by our research group, we determined the radial velocity of stars belonging to a group of open clusters using spectra with a resolution of 4000, obtained at the Pico dos Dias Observatory (LNA) with the 1.60 m telescope and the Coudé spectrograph. We observed the open cluster's member stars and calculated their radial speeds using standard techniques. The stars were selected from our own database based on relevant information concerning the clusters, obtained by statistical analysis of their proper motions and/or their position in the HR's diagram. In this work, we present the detailed analysis of the data reduction and radial velocity determination using synthetic spectra from different libraries. Finally we present the open cluster's radial (and spacial) velocities.

  16. An MS-DOS-based program for analyzing plutonium gamma-ray spectra

    SciTech Connect

    Ruhter, W.D.; Buckley, W.M.

    1989-09-07

    A plutonium gamma-ray analysis system that operates on MS-DOS-based computers has been developed for the International Atomic Energy Agency (IAEA) to perform in-field analysis of plutonium gamma-ray spectra for plutonium isotopics. The user interacts with the system by means of menus and screens that allow the user to select various applications and to enter information pertinent to a measurement. This information, along with the plutonium weight-percent-abundance results from the data analysis, is stored in dBASE III files. The spectral-data-analysis program, IAEAPU, determines the relative plutonium isotopic abundances from gamma-ray peaks in the 110- to 390-keV region of the spectral data. The program is compact so that it may be used on a portable, battery-operated, laptop, personal computer (PC) that uses a 3-1/2-in. floppy diskette. This is intended to be the final report on this work. We describe in detail the data-analysis methodology, the software, and the operation of the plutonium gamma-ray analysis system. 10 refs., 1 fig., 2 tabs.

  17. DOS and electron attachment effects in the electron-induced vibrational excitation of terphenylthiol SAMs.

    PubMed

    Houplin, J; Amiaud, L; Dablemont, C; Lafosse, A

    2015-11-11

    Low energy electron scattering on terphenylthiol (TPT, HS-(C6H4)2-C6H5) self-assembled monolayers (SAMs) deposited onto gold was investigated using high resolution electron energy loss spectroscopy (HREELS) by recording specular elastic and inelastic excitation functions. The electron elastic reflectivity could be directly compared to the sample density-of-states (DOS) above vacuum level. A high reflectivity region was observed in the range 7.2-8.6 eV. Inelastic excitation functions were studied to get insights into the mechanisms involved in the excitation of a selection of vibrational modes (dipolar and impact scattering). In particular, a resonant mechanism was observed in the excitation of the stretching mode ?(CC) at 196 meV. The purely resonant contribution to the electron-induced excitation of the stretching modes ?(CH) (379 meV) could be extracted from the overtone excitation. It is located at 7.2 eV above the vacuum level and is characterized by a width of 3.4 eV. PMID:26529112

  18. Lessons Learned from Sleep Education in Schools: A Review of Dos and Don'ts

    PubMed Central

    Blunden, Sarah; Rigney, Gabrielle

    2015-01-01

    Study Objectives: Sleep duration and quality are associated with negative neuropsychological and psychosocial outcomes in children and adolescents. However, community awareness of this is low and sleep education programs in schools are attempting to address this issue. Several studies now exist assessing the efficacy of these sleep education programs for improving sleep knowledge, sleep hygiene and sleep patterns. This paper presents these sleep education programs, most particularly, it presents the strengths and weaknesses of the current available studies in the hope that this can identify areas where future sleep education programs can improve. Methods: A systematic search of all school-based sleep education studies in adolescents was undertaken. Studies were scrutinized for author, teacher and participant comment regarding strengths and limitations of each study, which were then extracted and summarized. Results: Two specific types of sleep education programs emerged from the review, those that sought to change sleep behavior and those that sought simply to disseminate information. Issues that dictated the strength or weakness of a particular study including who delivers the program, the theoretical basis, the tools utilized to measure sleep patterns, the content, and their capacity to engage students were assessed. Sleep education was considered important by teachers, students and parents alike. Conclusions: Future sleep education programs need to take into account lessons learned from previous sleep education efforts in order to maximize the potential for sleep education programs to improve the sleep health of our young people. Commentary: A commentary on this article appears in this issue on page 595. Citation: Blunden S, Rigney G. Lessons learned from sleep education in schools: a review of dos and don'ts. J Clin Sleep Med 2015;11(6):671–680. PMID:25766709

  19. A Bayesian Change point model for differential gene expression patterns of the DosR regulon of Mycobacterium tuberculosis

    PubMed Central

    Zhang, Yi; Hatch, Kim A; Wernisch, Lorenz; Bacon, Joanna

    2008-01-01

    Background Low oxygen availability has been shown previously to stimulate M. tuberculosis to establish non-replicative persistence in vitro. The two component sensor/regulator dosRS is a major mediator in the transcriptional response of M. tuberculosis to hypoxia and controls a regulon of approximately 50 genes that are induced under this condition. The aim of this study was to determine whether the induction of the entire DosR regulon is triggered as a synchronous event or if induction can unfold as a cascade of events as the differential expression of subsets of genes is stimulated by different oxygen availabilities. Results A novel aspect of our work is the use of chemostat cultures of M. tuberculosis which allowed us to control environmental conditions very tightly. We exposed M. tuberculosis to a sudden drop in oxygen availability in chemostat culture and studied the transcriptional response of the organism during the transition from a high oxygen level (10% dissolved oxygen tension or DOT) to a low oxygen level (0.2% DOT) using DNA microarrays. We developed a Bayesian change point analysis method that enabled us to detect subtle shifts in the timing of gene induction. It results in probabilities of a change in gene expression at certain time points. A computational analysis of potential binding sites upstream of the DosR-controlled genes shows how the transcriptional responses of these genes are influenced by the affinity of these binding sites to DosR. Our study also indicates that a subgroup of DosR-controlled genes is regulated indirectly. Conclusion The majority of the dosR-dependent genes were up-regulated at 0.2% DOT, which confirms previous findings that these genes are triggered by hypoxic environments. However, our change point analysis also highlights genes which were up-regulated earlier at levels of about 8% DOT indicating that they respond to small fluctuations in oxygen availability. Our analysis shows that there are pairs of divergent genes where one gene in the pair is up-regulated before the other, presumably for a flexible response to a constantly changing environment in the host. PMID:18294384

  20. Re-engineering of genetic circuit for 2-deoxystreptamine (2-DOS) biosynthesis in Escherichia coli BL21 (DE3).

    PubMed

    Chaudhary, Amit Kumar; Park, Je Won; Yoon, Yeo Joon; Kim, Byung-Gee; Sohng, Jae Kyung

    2013-02-01

    Various approaches for monocistronic constructions of genetic circuits have been designed for metabolite production but there has been no attempt to apply such methodology for aminoglycosides biosynthesis. Here, a simple and commercially available bio-part, despite the current trend focusing on the standardized BioBricks bio-parts available in the registry, is used. A 181-bp nucleotide fragment was designed for the efficient construction of an expression vector for monocistronic assembly of genes. Furthermore, a single vector with multi-monocistronic assembled genes for 2-deoxystreptamine (2-DOS) synthesis was constructed for production in engineered Escherichia coli. The working efficiency of model vector was concluded by reporter assay whereas the expressions of biosynthesis genes were confirmed by RT-PCR and SDS-PAGE. Production of 2-DOS was confirmed by TLC, LC-ELSD, and ESI-MS/MS. PMID:23108876

  1. Implementation of DoS attack and mitigation strategies in IEEE 802.11b/g WLAN

    NASA Astrophysics Data System (ADS)

    Deng, Julia; Meng, Ke; Xiao, Yang; Xu, Roger

    2010-04-01

    IEEE 802.11 wireless Local Area Network (WLAN) becomes very prevalent nowadays. Either as a simple range extender for a home wired Ethernet interface, or as a wireless deployment throughout an enterprise, WLAN provides mobility, convenience, and low cost. However, an IEEE 802.11b/g wireless network uses the frequency of unlicensed 2.4GHz, which makes the network unsafe and more vulnerable than traditional Ethernet networks. As a result, anyone who is familiar with wireless network may initiate a Denial of Service (DoS) attack to influence the common communication of the network or even make it crash. In this paper, we present our studies on the DoS attacks and mitigation strategies for IEEE 802.11b/g WLANs and describe some initial implementations using IEEE 802.11b/g wireless devices.

  2. Video movie making using remote procedure calls and 4BSD Unix sockets on Unix, UNICOS, and MS-DOS systems

    SciTech Connect

    Robertson, D.W.; Johnston, W.E.; Hall, D.E.; Rosenblum, M.

    1990-03-01

    We describe the use of the Sun Remote Procedure Call and Unix socket interprocess communication mechanisms to provide the network transport for a distributed, client-server based, image handling system. Clients run under Unix or UNICOS and servers run under Unix or MS-DOS. The use of remote procedure calls across local or wide-area networks to make video movies is addressed.

  3. Hydrogen sulfide stimulates the catalytic activity of a heme-regulated phosphodiesterase from Escherichia coli (Ec DOS).

    PubMed

    Takahashi, Hiroto; Sekimoto, Madoka; Tanaka, Masahiro; Tanaka, Atsunari; Igarashi, Jotaro; Shimizu, Toru

    2012-04-01

    Ec DOS, a heme-regulated phosphodiesterase from Escherichia coli, is an oxygen sensor enzyme composed of a heme-bound O(2) sensor domain at the N-terminus and a catalytic domain at the C-terminus. The catalytic activity of Ec DOS is substantially enhanced with the formation of a Fe(II) heme-O(2) complex. The physiological importance of H(2)S as a fourth signaling gas molecule in addition to O(2), CO and NO is an emerging focus of research, since H(2)S participates in various physiological functions. In the present study, we showed that catalysis by Ec DOS is markedly increased by H(2)S under aerobic conditions. Absorption spectral findings suggest that SH(-)-modified heme iron complexes, such as Fe(III)-SH(-) and Fe(II)-O(2) complexes, represent the active species for H(2)S-induced catalysis. We further examined the role of Cys residues in H(2)S-induced catalysis using Cys?Ala mutant enzymes. Based on the collective data, we speculate that H(2)S-induced catalytic enhancement is facilitated by an admixture of Fe(III)-SH(-) and Fe(II)-O(2) complexes formed during catalysis and modification of specific Cys residue(s) in the catalytic domain. PMID:22387619

  4. En la bsqueda de caractersticas en eyecciones coronales de masa que discriminen entre dos paradigmas fsicos en modelos de ECMs

    NASA Astrophysics Data System (ADS)

    Paissan, G.; Stenborg, G.; Rovira, M.

    Se conocen tres diferentes fenmenos de gran escala que ocurren en la atmsfera solar, denominados eyecciones coronales de masa (ECMs), protuberancias eruptivas y grandes fulguraciones de dos bandas. Estos fenmenos estn estrechamente relacionados y podran ser distintas manifestaciones de un nico proceso fsico. Las ECMs son definidas como eyecciones de gran escala de masa y flujo magntico desde la baja corona al espacio interplanetario. Desde su descubrimiento en los '70, muchos modelos han sido propuestos para explicar su origen y evolucin. La explicacin fsica de las ECMs es un tema de debate intenso. No obstante, los modelos pueden sintetizarse en dos grandes grupos: 1) los modelos de inyeccin de flujo y 2) los modelos de almacenamiento y liberacin. En este trabajo, se presentan los estudios realizados con una serie de eventos observados con el corongrafo MICA (Mirror Coronograph for Argentina), el telescopio en H-alfa HASTA (H-alpha Solar Telescope for Argentina) y los corongrafos C2 y C3 de la sonda SOHO (Solar and Heliospheric Observatory). Los eventos que pudieron ser identificados como ECMs son contrastados dentro del esquema de los dos paradigmas tericos propuestos.

  5. Research on a Denial of Service (DoS) Detection System Based on Global Interdependent Behaviors in a Sensor Network Environment

    PubMed Central

    Song, Jae-gu; Jung, Sungmo; Kim, Jong Hyun; Seo, Dong Il; Kim, Seoksoo

    2010-01-01

    This research suggests a Denial of Service (DoS) detection method based on the collection of interdependent behavior data in a sensor network environment. In order to collect the interdependent behavior data, we use a base station to analyze traffic and behaviors among nodes and introduce methods of detecting changes in the environment with precursor symptoms. The study presents a DoS Detection System based on Global Interdependent Behaviors and shows the result of detecting a sensor carrying out DoS attacks through the test-bed. PMID:22163475

  6. Rare earth elements in Angra dos Reis and Lewis Cliff 86010, two meteorites with similar but distinct magma evolutions

    NASA Technical Reports Server (NTRS)

    Crozaz, Ghislaine; Mckay, Gordon

    1990-01-01

    Data are presented on ion microprobe measurements of REE and selected trace element abundances in individual grains of merrillite, fassaite, olivine, kirschsteinite, and plagioclase of Lewis Cliff 86010 (LEW 86010) meteorite and in merrillite and fassaite grains of Angra dos Reis (ADOR). Results show a close relationship between the two meteorites and support a magmatic origin for LEW 86010. However, the measurements indicate that, despite numerous common characteristics, the two meteorites must have been produced in separate magmatic events involving similar but distinct processes and parent melts.

  7. 32 CFR Appendix C to Part 197 - Procedures for the Department of State (DoS) Foreign Relations of the United States (FRUS) Series

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... the DoS for the FRUS series under Public Law No. 102-138. b. Request authorization from the CIA, NSC.... Submit to the respective Agency a list of CIA and NSC documents copied and released to the...

  8. 32 CFR Appendix C to Part 197 - Procedures for the Department of State (DoS) Foreign Relations of the United States (FRUS) Series

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... the DoS for the FRUS series under Public Law No. 102-138. b. Request authorization from the CIA, NSC.... Submit to the respective Agency a list of CIA and NSC documents copied and released to the...

  9. 32 CFR Appendix C to Part 197 - Procedures for the Department of State (DoS) Foreign Relations of the United States (FRUS) Series

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... the DoS for the FRUS series under Public Law No. 102-138. b. Request authorization from the CIA, NSC.... Submit to the respective Agency a list of CIA and NSC documents copied and released to the...

  10. 32 CFR Appendix C to Part 197 - Procedures for the Department of State (DoS) Foreign Relations of the United States (FRUS) Series

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... the DoS for the FRUS series under Public Law No. 102-138. b. Request authorization from the CIA, NSC.... Submit to the respective Agency a list of CIA and NSC documents copied and released to the...

  11. 32 CFR Appendix C to Part 197 - Procedures for the Department of State (DoS) Foreign Relations of the United States (FRUS) Series

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... the DoS for the FRUS series under Public Law No. 102-138. b. Request authorization from the CIA, NSC.... Submit to the respective Agency a list of CIA and NSC documents copied and released to the...

  12. Didelphidae marsupials (Mammalia, Didelphimorphia) from the late Pleistocene deposit of the Gruta dos Moura Cave, northern Brazil.

    PubMed

    Nova, Patricia Villa; Avilla, Leonardo S; Oliveira, Édison V

    2015-03-01

    The present study acknowledges the diversity of fossil marsupials from the Gruta dos Moura cave, as well as environmental and climatic aspects during the Quaternary. The results show that this is the largest diversity of Pleistocene marsupials recorded in a single cave: Didelphis albiventris, D. aurita, Gracilinanus agilis, G. microtarsus, Marmosa murina, Monodelphis brevicaudata, M. domestica and Sairadelphys tocantinensis. Furthermore, the described specimens are also part of the only fossil assemblage unequivocally referable to the late Pleistocene. Paleontological studies suggest an intimate association with dry and open environments with high abundance of water sources. Since most of the identified taxa are characteristic of open forests and gallery forests, this could represent the actual environment around the Gruta dos Moura cave. Recent studies identified sympatric occurrences between species from open and dry environments and species from humid forests that were identified among our material and are characteristic of humid regions. Therefore, these species could inhabit gallery forests and capons, or even ecotones, inside a dry and open environment. Moreover, the extinction of Sairadelphys could also indicate that the climatic and environmental conditions changed or that the past environment was more heterogeneous than the current environment of the region. PMID:25806985

  13. The W-Beijing Lineage of Mycobacterium tuberculosis Overproduces Triglycerides and Has the DosR Dormancy Regulon Constitutively Upregulated?

    PubMed Central

    Reed, Michael B.; Gagneux, Sebastien; DeRiemer, Kathryn; Small, Peter M.; Barry, Clifton E.

    2007-01-01

    The Beijing family of Mycobacterium tuberculosis strains has been associated with epidemic spread and an increased likelihood of developing drug resistance. The characteristics that predispose this family to such clinical outcomes have not been identified, although one potential candidate, the phenolic glycolipid PGL-tb, has been shown to mediate a fulminant lethal disease in mice and rabbits due to lipid-mediated immunosuppression. However, PGL-tb is not uniformly expressed throughout the Beijing lineage and may not be the only unique virulence trait associated with this family. In an attempt to define phenotypes common to all Beijing strains, we interrogated a carefully selected set of isolates representing the five extant lineages of the Beijing family. Comparison of lipid production in this set revealed that all Beijing strains accumulated large quantities of triacylglycerides in in vitro aerobic culture. This accumulation was found to be coincident with upregulation of Rv3130c, whose product was previously characterized as a triacylglyceride synthase. Rv3130c is a member of the DosR-controlled regulon of M. tuberculosis, and further examination revealed that several members of this regulon were upregulated throughout this strain family. The upregulation of the DosR regulon may confer an adaptive advantage for growth in microaerophilic or anaerobic environments encountered by the bacillus during infection and thus may be related to the epidemiological phenomena associated with this important strain lineage. PMID:17237171

  14. Supporting Security against SYN Flooding Attack in Distributed DoS Via Measuring IPFIX-Based Traffic

    NASA Astrophysics Data System (ADS)

    Alipour, H.; Kia, M. Kashefi; Esmaeili, M.

    Distributed denial-of-service attacks on public servers after 2000 have become a serious problem. In the distributed denial-of-service (DDoS) attacks often seen recently, multiple distributed nodes concurrently attack a single server. To assure that network services will not be interrupted, faster and more effective defense mechanisms is needed to protect against malicious traffic, especially SYN floods. One problem in detecting SYN flood traffic is that server nodes or firewalls cannot distinguish the SYN packets of normal TCP connections from those of a SYN flood attack. Our method, FDFIX, relies on the use of monitoring and measurement techniques to evaluate the impact of DoS attacks. It uses flow based measurements. Capturing flow information is very important for detecting DoS and also other kinds of attacks. Flow monitoring allows detecting suspicious traffics and in the next step can analyze attacking flows and the results can be used for defense methods. Our method provides required information for many mechanisms that use traffic measurement as their input.

  15. Mycobacterium tuberculosis DosR Regulon Gene Rv0079 Encodes a Putative, Dormancy Associated Translation Inhibitor (DATIN)

    PubMed Central

    Kumar, Ashutosh; Majid, Mohammad; Kunisch, Ralph; Rani, Pittu Sandhya; Qureshi, Insaf A.; Lewin, Astrid; Hasnain, Seyed E.; Ahmed, Niyaz

    2012-01-01

    Mycobacterium tuberculosis is a major human pathogen that has evolved survival mechanisms to persist in an immune-competent host under a dormant condition. The regulation of M. tuberculosis metabolism during latent infection is not clearly known. The dormancy survival regulon (DosR regulon) is chiefly responsible for encoding dormancy related functions of M. tuberculosis. We describe functional characterization of an important gene of DosR regulon, Rv0079, which appears to be involved in the regulation of translation through the interaction of its product with bacterial ribosomal subunits. The protein encoded by Rv0079, possibly, has an inhibitory role with respect to protein synthesis, as revealed by our experiments. We performed computational modelling and docking simulation studies involving the protein encoded by Rv0079 followed by in vitro translation and growth curve analysis experiments, involving recombinant E. coli and Bacille Calmette Gurin (BCG) strains that overexpressed Rv0079. Our observations concerning the interaction of the protein with the ribosomes are supportive of its role in regulation/inhibition of translation. We propose that the protein encoded by locus Rv0079 is a dormancy associated translation inhibitor or DATIN. PMID:22719925

  16. A estabilidade dos PAHS em funo da energia da radiao interestelar nas faixas UV e raios-X

    NASA Astrophysics Data System (ADS)

    Pinotti, R.; Costa, R. K.; Boechat-Roberty, H. M.; Lago, A.; Souza, G. B.

    2003-08-01

    A nebulosa CRL 618, uma proto-nebulosa planetria cuja nuvem molecular espessa envolve uma estrela B0, contm uma grande quantidade de C2H2 e CH4. Estas molculas so consideradas os tijolos da criao de grandes molculas carbonadas como os Hidrocarbonetos Policclicos Aromticos (PAHs). Esta nebulosa, por estar exposta a intensos campos de UV e Raios-X, uma regio de fotodissociao molecular que propicia a formao de novas molculas, confirmada pela presena de C4H2 e C6H6 (Benzeno), que a unidade bsica dos PAHs. Atribui-se a esta famlia de molculas orgnicas duas propriedades fundamentais, a resistncia para sobreviver ao campo de radiao UV interestelar e a gerao das bandas de emisso no identificadas (UIR) observadas no infravermelho. No entanto, alguns autores questionam a resistncia dos PAHs ao campo de radiao UV interestelar. Empregando a tcnica de Espectrometria de Massas por Tempo de Vo, no modo de coincidncia fotoeltron-fotoon, estudamos a ionizao e fragmentao das seguintes molculas: Benzeno, Benzeno deuterado, Naftaleno, Antraceno e Fenantreno. Utilizamos uma fonte de Hlio monocromtica em 21,21 eV (584,5 ) e a radiao Sncroton do Laboratrio Nacional de Luz Sncroton (LNLS) em diferentes energias nas proximidades da borda do C 1s ( 290 eV). Comprovamos a estabilidade dos PAHs sob ao de UV (21,21 eV), onde eles apresentam um baixo nvel de fotodissociao, produzindo fragmentos ionizados com rendimento total na ordem de 5 por cento em relao ao on molecular pai. Entretanto, em altas energias, na faixa de Raios-X, a quebra destas molculas torna-se mais intensa, com a produo de muitos fragmentos. Como uma das rotas de fragmentao do Naftaleno [(C10H8) = > (C6H6+) + (C4H2) + (e-)], e como temos as evidncias observacionais da existncia do C4H2 e C6H6 na nebulosa CRL 618, sugerimos que este ambiente tambm possui o Naftaleno.

  17. Identificabilidade e estabilidade dos parmetros no mtodo Grade of Membership (GoM): consideraes metodolgicas e prticas

    PubMed Central

    Guedes, Gilvan Ramalho; Caetano, Andr Junqueira; Machado, Carla Jorge; Brondzio, Eduardo Sonewend

    2011-01-01

    O mtodo Grade of Membership (GoM) tem sido cada vez mais utilizado por demgrafos brasileiros e tem a vantagem de possuir um parmetro que mensura a heterogeneidade individual, com base nas correlaes no-observveis entre as categorias de resposta das variveis de interesse, gerando um medida do grau de pertencimento de cada indivduo a perfis extremos. Alguns autores, contudo, chamam ateno para questes importantes na calibragem dos modelos finais que utilizam o programa GoM verso 3.4, como o problema de identificabilidade solues mltiplas para parmetros estimados. Neste artigo, sugerido um procedimento capaz de identificar um modelo final com soluo nica que descreva os tipos puros mais fidedignos base de dados, em uma tentativa de otimizao. Para ilustrar esse processo, utilizou-se uma base de dados correspondente a um levantamento econmico e sociodemogrfico de uma populao de pequenos agricultores residentes ao longo da Rodovia Transamaznica, no Estado do Par. Tambm identificou-se a existncia de instabilidade nos parmetros estimados pelo programa GoM 3.4, sendo proposto um mtodo de estabilizao de seus valores. Com esses procedimentos combinados, os usurios do programa GoM 3.4 podero descrever sua base de dados de forma mais adequada e responder s crticas sobre questes de identificabilidade e estabilidade dos modelos resultantes. Essas solues empricas so relevantes por afetarem clculos de prevalncia e de incidncia de eventos de interesse, alm de trazerem consequncias importantes sobre o ponto e o momento corretos para intervenes de polticas pblicas ou de planejamento prospectivo em anlises de projeo. PMID:21709732

  18. Dynamics of the T cell response to Mycobacterium tuberculosis DosR and Rpf antigens in a Colombian population of household contacts of recently diagnosed pulmonary tuberculosis patients.

    PubMed

    Arroyo, Leonar; Rojas, Mauricio; Ortíz, Blanca L; Franken, Kees L M C; García, Luis F; Ottenhoff, Tom H M; Barrera, Luis F

    2016-03-01

    Immune response to DosR and Rpf antigens from Mycobacterium tuberculosis (Mtb) seems to be important for latency maintenance. Little is known about the dynamics of the immune response to these antigens in an endemic community. Thus, the IFNγ response and cytokine production in response to PPD, Esat6-Cfp10 (E6-C10), DosR and Rpf antigens in healthy HHC of tuberculosis (TB) patients over a 12 (T12) months period (short-term, stLTBI) was investigated. This response was compared with a group of LTBI, who have remained healthy for 5-7 years (long-term, ltLTBI). According to the IFNγ response, two groups of HHCs were identified in stLTBI in response to E6-C10. At T12, E6-C10(+) HHCs displayed a decrease in the IFNγ levels and a generalized decrease in cytokines production. The E6-C10(-) HHC showed an increase in the IFNγ response and cytokine levels. In stLTBI, the responses to E6-C10, DosR, and Rpf may be interpreted as a protective immune response controlling Mtb infection and may be leading to a state of latent infection. Comparing the response of stLTBI and ltLTBI, we observed significant changes in the proportions of CD45RO(+)CD27(+) T cells to specific DosR and Rpf, which may indicate a persistent immune response to Mtb antigens in ltLTBI. PMID:26980501

  19. Essentiality of DevR/DosR Interaction with SigA for the Dormancy Survival Program in Mycobacterium tuberculosis

    PubMed Central

    Gautam, Uma S.; Sikri, Kriti; Vashist, Atul; Singh, Varshneya

    2014-01-01

    The DevR/DosR regulator is believed to play a key role in dormancy adaptation mechanisms of Mycobacterium tuberculosis in response to a multitude of gaseous stresses, including hypoxia, which prevails within granulomas. DevR activates transcription by binding to target promoters containing a minimum of two binding sites. The proximal site overlaps with the SigA −35 element, suggesting that DevR-SigA interaction is required for activating transcription. We evaluated the roles of 14 charged residues of DevR in transcriptional activation under hypoxic stress. Seven of the 14 alanine substitution mutants were defective in regulon activation, of which K191A, R197A, and K179A+K168A (designated K179A*) mutants were significantly or completely compromised in DNA binding. Four mutants, namely, E154A, R155A, E178A, and K208A, were activation defective in spite of binding to DNA and were classified as positive-control (pc) mutants. The SigA interaction defect of the E154A and E178A proteins was established by in vitro and in vivo assays and implies that these substitutions lead to an activation defect because they disrupt an interaction(s) with SigA. The relevance of DevR interaction to the transcriptional machinery was further established by the hypoxia survival phenotype displayed by SigA interaction-defective mutants. Our findings demonstrate the role of DevR-SigA interaction in the activation mechanism and in bacterial survival under hypoxia and establish the housekeeping sigma factor SigA as a molecular target of DevR. The interaction of DevR and RNA polymerase suggests a new and novel interceptable molecular interface for future antidormancy strategies for Mycobacterium tuberculosis. PMID:24317401

  20. Stratigraphy of fluvial sediment sequences and their palaeoenvironmental information in the foreland of the Serra dos rgos, southeastern Brazil

    NASA Astrophysics Data System (ADS)

    Kirchner, Andr; Nehren, Udo; Heinrich, Jrgen

    2013-04-01

    In the hinterland of Rio de Janeiro city the rivers Guapiau, Macacu and Iconha originate in the Serra dos rgos mountain range and drain into the Atlantic Ocean. Since their channelization in the 1950s, higher flow velocities caused an incision of the rivers into the valley fills. These circumstances provide the possibility to study the alluvial deposits along the streams during low water level and allow conclusions on palaeoenvironmental change and landscape history. Sedimentological investigations of 13 exposures as well as AMS 14C measurements were carried out to investigate sediment properties and reconstruct the sedimentation history within the floodplains. These results enable to distinguish three different facies units. A late Pleistocene Unit I can be detected at the base of the observed exposures and consists of clast-supported fine to coarse gravels. It can be assumed that the gravel bodies were formed by a climatically induced erosional-depositional cycle within a braided river system. The gravels are overlaid by Unit II, a grayish to bluish loam mainly of mid-Holocene age. During generally drier climates these loams have been deposited during high water stages or flooding events as a splay facies proximal to the rivers. A reduced flow competence and relatively stable morphodynamic conditions are assumed for that period. Unit III accumulated in the late Holocene typically consists of several meters of planar or cross bedded sands to fine gravels, interfingered by loamy inclusions, buried peat bogs and organic debris. Fining-upward sequences can be frequently studied within Unit III which were completed by loamy sediments in the uppermost parts of the exposures. The increased flow competence from Unit II to Unit III seems to be a fluvial response to the increased humidity of the late Holocene as well as the enhancement of El Nio-Southern Oscillation (ENSO). Heavy rainfall likely caused higher sediment supply from the steep slopes as well as a reworking of sediments followed by sedimentation in the floodplains. The development of the uppermost loams is attributed to deforestation and land use intensification in historical times which led to higher erosion rates and related sediment loads. An increased human impact can be postulated for the last 250 years.

  1. Queda dos homicídios em São Paulo, Brasil: uma análise descritiva

    PubMed Central

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

    2012-01-01

    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

  2. 2.3 X-ray Structure of the Heme-Bound GAF Domain of Sensory Histidine Kinase DosT of Mycobacterium tuberculosis

    PubMed Central

    Podust, Larissa M.; Ioanoviciu, Alexandra; Ortiz de Montellano, Paul R.

    2009-01-01

    Mycobacterium tuberculosis responds to the changes in environmental conditions through a two-component signaling system that detects reduced O2 tension and NO and CO exposures via the heme-binding GAF domains of two sensory histidine kinases, DosT and DevS, and the transcriptional regulator DosR. We report the first x-ray structure of the DosT heme-bound GAF domain (GAFDosT) in both oxy and deoxy forms determined to a resolution of 2.3 . In GAFDosT, heme binds in an orientation orthogonal to that in the PAS domains via a highly conserved motif including invariant H147 as a proximal heme axial ligand. On the distal side, invariant Y169 is in stacking interactions with the heme with its long axis parallel and the plane of the ring orthogonal to the heme plane. In one of the two protein monomers in an asymmetric unit, O2 binds as a second axial ligand to the heme iron, and is stabilized via an H-bond to the OH-group of Y169. The structure reveals two small tunnel-connected cavities and a pore on the protein surface that suggest a potential route for O2 access to the sensing pocket. The limited conformational differences observed between differently heme iron-ligated GAFDosT monomers in the asymmetric unit may result from crystal lattice limitations since atmospheric oxygen binding likely occurs in the crystal as a result of x-ray induced Fe3+ photoreduction during diffraction data collection. Determination of the GAFDosT structure sets up a framework in which to address ligand-recognition, discrimination, and signal propagation schemes in the heme-based GAF domains of biological sensors. PMID:18980385

  3. Assembly of overlapping DNA sequences by a program written in BASIC for 64K CP/M and MS-DOS IBM-compatible microcomputers.

    PubMed Central

    Johnston, R E; Mackenzie, J M; Dougherty, W G

    1986-01-01

    The SEQALIGN programs1 described in this report aid in the assembly of up to 100 individual overlapping DNA sequences generated by M-13 subcloning and sequencing methods. The program produces a printout of the aligned sequences presented in register. Use of the program will be facilitated because 1) it is written with the Microsoft BASIC interpreter, 2) sequence data may be entered and edited using WORDSTAR or similar word processing programs, and 3) hardware requirements for execution of the program on CP/M or MS-DOS (IBM-PC compatible) systems are minimal. PMID:3753786

  4. ?Differential expression of dnaA and dosR genes among members of the Mycobacterium tuberculosis complex under oxic and hypoxic conditions.

    PubMed

    Badillo-Lpez, Claudia; Gonzlez-Meja, Arturo; Helguera-Repetto, A Cecilia; Salas-Rangel, Laura P; Rivera-Gutirrez, Sandra; Cerna-Corts, Jorge F; Gonzlez-Y-Merchand, Jos A

    2010-03-01

    Major differences regarding the pathology and host immune response of the Beijing and Canettii genotypes of Mycobacterium tuberculosis have been reported; however, studies on the genetic expression of these genotypes during in vitro dormancy are scarce. This study examined the expression of five cell-cycle-related genes and two dormancy-related genes in M. canettii, M. tuberculosis H37Rv, and M. tuberculosis Beijing during the Wayne model of dormancy. The results showed that under hypoxic conditions the three tuberculosis genotypes were able to transcribe genes involved in DNA replication and cellular division. In addition, dosR was found to be up-regulated in M. tuberculosis Beijing during the exponential growth phase but down-regulated under hypoxic conditions. In this genotype, the replication-related gene dnaA was also strongly down-regulated. These latter two findings suggest that, compared to M. tuberculosis H37Rv and M. canettii, the Beijing genotype has a lower capacity to synthesize dosR, hspX, and dnaA mRNAs during in vitro dormancy. PMID:20890835

  5. Católicos, fidelidade conjugal e AIDS: entre a cruz da doutrina moral e as espadas do cotidiano sexual dos adeptos1

    PubMed Central

    Rios, Luis Felipe; de Aquino, Francisca Luciana; Muñoz-Laboy, Miguel; Oliveira, Cinthia; Parker, Richard

    2009-01-01

    Neste artigo discutimos a visão da Igreja Católica sobre sexualidade na interface com a epidemia do HIV/AIDS. Nossa reflexão está embasada em pesquisa etnográfica que envolveu dois meses de observação participante do cotidiano de católicos de um bairro popular da Região Metropolitana do Recife, além de contar com entrevistas a onze dos leigos engajados nos serviços religiosos da igreja do bairro e a oito sacerdotes que realizam seus trabalhos religiosos em outras localidades. Nelas abordamos diferentes temáticas relacionadas ao enfrentamento da epidemia da AIDS. Nesse contexto, conjugalidade e fidelidade se afiguram como importantes analisadores de como aqueles lidam com a epidemia, em uma variedade de re-descrições práticas e de re-interpretações conceptuais das assertivas do discurso moral religioso – ainda que, muitos impasses permaneçam em aberto em termos das prerrogativas da Igreja e seus possíveis rebatimentos na saúde sexual dos adeptos. PMID:21765650

  6. Qual o Papel da Escola e da Mídia na Obtenção dos Conhecimentos Astronômicos?

    NASA Astrophysics Data System (ADS)

    da Cunha, W. S.; Voelzke, M. R.; Amaral, L. H.

    2007-08-01

    É amplamente reconhecido que as pessoas em geral têm grande fascínio e interesse pela Astronomia. Por outro lado, o conteúdo dessa área incluído no ensino formal está longe de ser abrangente e suficiente para suprir a demanda. Esse interesse permite aperfeiçoar a divulgação e o ensino não formal de Astronomia através da mídia aliando a adequação do conteúdo à expectativa das pessoas. A reforma do Currículo Básico da Escola Pública da maioria dos Estados brasileiros tem introduzido Astronomia desde a pré-escola até o Ensino Médio. Num estudo realizado com 1180 alunos do Ensino Médio de seis escolas estaduais, revelou-se através da aplicação de um formulário contendo questões que abordavam conhecimentos básicos em Astronomia, como foram adquiridos tais conhecimentos e à infra-estrutura da escola. Para 66,1% dos entrevistados o professor já fez alguma apresentação a respeito de Astronomia. O presente estudo revelou também que 54,4% dos alunos entrevistados adquiriram seus conhecimentos astronômicos na escola, 18,4% através da televisão e 27,1% afirmaram que seus conhecimentos foram obtidos através de outros tipos de mídia (internet, livros didáticos, filmes e revistas). Embora o estudo revele claramente que há certo equilíbrio no meio em que os alunos obtiveram seus conhecimentos astronômicos, a mídia busca não somente sua difusão, mas a disponibilização desse conhecimento de maneira correta, que às vezes, não é atingido, apresentando conceitos sem fundamentação e incorretos. Por outro lado, no dia-a-dia escolar, é comum encontrar professores que vêm para as aulas com concepções prévias, que podem diferir substancialmente das idéias a serem ensinadas, dificultando o aprendizado de futuros conceitos científicos. Uma avaliação criteriosa, avaliando as dificuldades dos professores em determinar o sentido correto dos conceitos e observando a metodologia que utilizam no ensino, poderá proporcionar uma melhor compreensão sobre as concepções alternativas, presentes no ensino de Astronomia.

  7. [Ecological aspects of phlebotomus of the Parque Nacional da Serra dos Orgos, Rio de Janeiro. I. Monthly frequency in human baits (Diptera, Psychodidae, Phlebotominae)].

    PubMed

    de Aguiar, G M; Soucasaux, T

    1984-01-01

    During two full years--from October 1980 to September 1982--we captured sandflies in the National Park of Serra dos Orgos, State of Rio de Janeiro, Brazil. The captures, with human bait, were carried out weekly, each with a duration of two hours, and at three different times (6 to 8 a.m., 5 to 7 a.m. and 7:30 to 9:30 p.m.). In every capture, we recorded the phase of the moon and, at each hour, the temperature, relative humidity, wind and rain. In 586 hours 4,834 sandflies of ten species were captured, all belonging to genus Lutzomyia Frana, 1924. L. ayrozai and L. hirsuta represented 92% of the total species captured. However, they were dominant at different times, the former being more frequent in the warm and wet months, and considerably declining in the cold and dry months, in which the latter gradually prevailed. L. fischeri and L. shannoni were shown to be the most resistant to unfavourable weather conditions. Whenever there was any rain or wind, they were, in general, the only species captured. With regard to lunar cycle, we observed that new moon was the most favourable phase for the capture of sandflies and full moon the one with the smallest yield, except for L. shannoni which occurred more frequently during this period. PMID:6535916

  8. Analysis of the Astronomical Concepts Presented by Teachers of Science, Physics, and Mathematics of São José dos Campos / SP Municipality

    NASA Astrophysics Data System (ADS)

    Pereira Gonzaga, Edson; Voelzke, Marcos Rincon

    2013-11-01

    The aim of this work is to conduct a survey of alternative conceptions about the basic concepts of Astronomy from schoolteachers in the City of São José dos Campos. This study covers the the state-run education system and complies with legal documents related to the curriculum of educational systems, such as the Curriculum of São Paulo State and the Parameters of the National Curriculum (PCN). Alternative conceptions, mentioned in Langhi (2009) as very important, were used, because it is believed that if a student can learn these concepts before the methodological intervention, it is possible to prepare contextualized presentations for teachers, and consequently students, to compare what they already know with the new information they obtain in the sessions at the digital mobile planetarium (DMP) of the Universidade Cruzeiro do Sul. Afterwards, they may discuss in a forum, in the form of debate, seeking to draw conclusions relevant to the topic, and transmitting the same to students in Basic Education (EB). This is a case study with a quantitative survey and a qualitative analysis of data on astronomical concepts collected through two questionnaires, one before and one after the intervention, respecting the implementation period of the study,- here called methodological intervention of content presentations at the mobile planetarium - and on respective discussions.

  9. Combined use of aerogammaspectrometry and geochemistry to access sediment sources in a shallow coral site at Armação dos Búzios, Brazil

    NASA Astrophysics Data System (ADS)

    Godiva, Danielly; Evangelista, Heitor; Kampel, Milton; Licinio, Marcus Vinicius; Munita, Casimiro

    2010-05-01

    Coral and reef environments in shallow waters are negatively affected by human activities in several coastal areas worldwide. It has been demonstrated that sediment influx and macronutrient discharges induce decline of coral population structure and diversity. Therefore, efforts to quantify sediment flux, sources and the biological response to sedimentation were conducted by several marine researchers. Herein, we investigated the case study of Armação dos Búzios/Brazil/Western South Atlantic, where coral colonies (mostly Siderastrea stellata) are under stress due to sediment apportionment as a consequence of regional human occupation. Classification of potential sediment source regions was based on a high-resolution aerogammaspectrometry survey for 232Th, 238U and 40K in main land near shore, used as primarily tool, in combination with sediment geochemistry. This approach allowed distinguishing three hydrographic basins (Macaé river basin, São João river basin and Una river basin) as potential sources. Hierarchical cluster analysis applied to the set of parameters identified the Macaé River as the most probable sediment contributor to the coralline site.

  10. ASPECTS OF THE ECOLOGY OF PHLEBOTOMINES (Diptera: Psychodidae: Phlebotominae) IN AN AREA OF CUTANEOUS LEISHMANIASIS OCCURRENCE, MUNICIPALITY OF ANGRA DOS REIS, COAST OF RIO DE JANEIRO STATE, BRAZIL

    PubMed Central

    de Aguiar, Gustavo Marins; de Azevedo, Alfredo Carlos Rodrigues; de Medeiros, Wagner Muniz; Alves, João Ricardo Carreira; Rendeiro, Vanessa

    2014-01-01

    Over a complete two-year period, phlebotomine specimens were caught in an area of cutaneous leishmaniasis occurrence in the municipality of Angra dos Reis. A manual suction tube was used to catch phlebotomines on house walls, and also light traps in domestic and peridomestic settings and in the forest. This yielded 14,170 specimens of 13 species: two in the genus Brumptomyia and eleven in the genus Lutzomyia. L. intermedia predominantly in domestic and peridomestic settings, with little presence in the forest, with the same trend being found in relation to L. migonei, thus proving that these species have adapted to the human environment. L. fischeri appeared to be eclectic regarding location, but was seen to be proportionally more endophilic. L. intermedia and L. migonei were more numerous in peridomestic settings, throughout the year, while L. fischeri was more numerous in domestic settings except in March, April, May and September. From the prevalence of L. intermedia, its proven anthropophily and findings of this species naturally infected with Leishmania (Viannia) braziliensis, it can be incriminated as the main vector for this agent of cutaneous leishmaniasis in the study area, especially in the peridomestic environment. L. fischeri may be a coadjuvant in carrying the parasite. PMID:24626417

  11. Pressure effects reveal that changes in the redox states of the heme iron complexes in the sensor domains of two heme-based oxygen sensor proteins, EcDOS and YddV, have profound effects on their flexibility.

    PubMed

    Anzenbacher, Pavel; Marchal, Stphane; Palack, Jan; Anzenbacherov, Eva; Domaschke, Thomas; Lange, Reinhard; Shimizu, Toru; Kitanishi, Kenichi; Stranava, Martin; Stiborov, Marie; Martinkova, Marketa

    2014-12-01

    The catalytic activity of a heme-based oxygen sensor phosphodiesterase from Escherichiacoli (EcDOS) towards cyclic diGMP is regulated by the redox state of the heme iron complex in the enzyme's sensing domain and the association of external ligands with the iron center. Specifically, the Fe(II) complex is more active towards cyclic diGMP than the Fe(III) complex, and its activity is further enhanced by O2 or CO binding. In order to determine how the redox state and coordination of the heme iron atom regulate the catalytic activity of EcDOS, we investigated the flexibility of its isolated N-terminal heme-binding domain (EcDOS-heme) by monitoring its spectral properties at various hydrostatic pressures. The most active form of the heme-containing domain, i.e. the Fe(II)-CO complex, was found to be the least flexible. Conversely, the oxidized Fe(III) forms of EcDOS-heme and its mutants had relatively high flexibilities, which appeared to be linked to the low catalytic activity of the corresponding intact enzymes. These findings corroborate the suggestion, made on the basis of crystallographic data, that there is an inverse relationship between the flexibility of the heme-containing domain of EcDOS and its catalytic activity. The Fe(II)-CO form of the heme domain of a second heme-based oxygen sensor, diguanylate cyclase (YddV), was also found to be quite rigid. Interestingly, the incorporation of a water molecule into the heme complex of YddV caused by mutation of the Leu65 residue reduced the flexibility of this heme domain. Conversely, mutation of the Tyr43 residue increased its flexibility. PMID:25238584

  12. Earth and Heavens: Two Separate Universes? (Spanish Title: Tierra y Cielos: ¿Dos Universos Separados?) Terra e Céus: Dois Universos Separados?

    NASA Astrophysics Data System (ADS)

    Carrascosa, Jaime; Gil-Pérez, Daniel; Solbes, Jordi; Vilches, Amparo

    2005-12-01

    The study of gravitation constitutes an exceptional occasion to show the richness and complexity of science and technology, contemplating, among other things: the problematic situations which are at the heart of the scientific knowledge, the difficulties encountered in the construction of knowledge and, especially, the necessity of overcoming "common-sense evidence" that proclaimed the existence of an insurmountable barrier between Earth and Heavens, hindering scientific development during many centuries. In this paper we present a program of activities to orient the study of Gravitation atUpperHigh School, favoring students' participation in the reconstruction of this first scientific revolution and giving them the opportunity to see the importance of Astronomy both in the history of science and today. El estudio de la gravitación constituye una ocasión excepcional para mostrar la ciencia y la tecnología en toda su riqueza y complejidad, considerando, entre otros aspectos:

  13. Las situaciones problemáticas relevantes que llevaron a la construcción de los conocimientos,
  14. las dificultades de todo tipo con las que hubo que enfrentarse y, muy en particular,
  15. la necesidad de superar las "evidencias de sentido común" que establecían una supuesta barrera infranqueable entre la Tierray los Cielos y que obstaculizaron durante siglos el desarrollo científico.
  16. En este trabajo presentamos un programa de actividades para el estudio de la gravitación en la secundaria superior, orientado a favorecer la participación de los estudiantes, en alguna medida, en la reconstrucción de este proceso que constituyó la denominada primera gran revolución científica y asomándonos al estudio de una de las ciencias más antiguas, la Astronomía, que hoy sigue despertando gran interés. O estudo da gravitação constitui uma ocasião excepcional para mostrar a ciência e a tecnologia em toda sua riqueza e complexidade, considerando, entre outros aspectos: as situações problemáticas relevantes que levaram à construção dos conhecimentos, as dificuldades de todo tipo que se teve que enfrentar nessa construção e, muito em particular,a necessidade de se superar as "evidências do senso comum" que estabeleciam uma suposta barreira intransponível entre a Terra e os Céus e que foram um obstáculo durante séculos para o desenvolvimento científico. Neste trabalho apresentamos um programa de atividades para o estudo da gravitação nos últimos anos do ensino médio, orientado a favorecer a participação dos estudantes, em alguma medida, na reconstrução deste processo que constituiu a denominada primeira grande revolução científica e a nos aproximarmos do estudo de uma das ciências mais antigas, a Astronomia, que hoje continua despertando grande interesse.

  17. Association between micronuclei frequency in pollen mother cells of Tradescantia and mortality due to cancer and cardiovascular diseases: a preliminary study in Sao Jos dos Campos, Brazil.

    PubMed

    Mariani, Rauda Lcia; Jorge, Maria Paulete Martins; Pereira, Sergio Silva; Melione, Luiz Paulo; Carvalho-Oliveira, Regiani; Ma, Te Hsiu; Saldiva, Paulo Hilrio Nascimento

    2009-06-01

    The present study was designed to explore the correlation between the frequency of micronuclei in Trad-MN, measured across 28 biomonitoring stations during the period comprised between 11 of May and 2 of October, 2006, and adjusted mortality rates due to cardiovascular, respiratory diseases and cancer in Sao Jos dos Campos, Brazil, an area with different sources of air pollution. For controlling purposes, mortality rate due to gastrointestinal diseases (an event less prone to be affected by air pollution) was also considered in the analysis. Spatial distribution of micronuclei frequency was determined using average interpolation. The association between health estimators and micronuclei frequency was determined by measures of Pearson's correlation. Higher frequencies of micronuclei were detected in areas with high traffic and close to a petrochemical pole. Significant associations were detected between micronuclei frequency and adjusted mortality rate due to cardiovascular diseases (r=0.841, p=0.036) and cancer (r=0.890, p=0.018). The association between mortality due to chronic obstructive pulmonary diseases was positive but did not reach statistical significance (r=0.640, p=0.172), probably because of the small number of events. Gastrointestinal mortality did not exhibit significant association with micronuclei frequency. Because the small number of observations and the nature of an ecological study, the present findings must be considered with caution and considered as preliminary. Further studies, performed in different conditions of contamination and climate should be done before considering Trad-MN in the evaluation of human health risk imposed by air pollutants. PMID:19303678

  18. Techniques of remote sensing applied to the environmental analysis of part of an aquifer located in the So Jos dos Campos Region sp, Brazil.

    PubMed

    Bressan, Mariana Affonseca; Dos Anjos, Clio Eustquio

    2003-05-01

    The anthropogenic activity on the surface can modify and introduce new mechanisms of recharging the groundwater system, modifying the tax, the frequency and the quality of recharge of underground waters. The understanding of these mechanisms and the correct evaluation of such modifications are fundamental in determining the vulnerability of groundwater contamination. The groundwater flow of the South Paraba Compartment, in the region of So Jos dos Campos, So Paulo, is directly related to structural features of the Taubat Basin and, therefore, the analysis of its behaviour enhances the understanding of tectonic structure. The methodology adopted for this work consists in pre-processing and processing of the satellite images, visual interpretation of HSI products, field work and data integration. The derivation of the main structural features was based on visual analysis of the texture elements of drainage, and the relief in sedimentary and crystalline rocks. Statistical analysis of the feature densities and the metric-geometric relations between the analysed elements have been conducted. The crystalline rocks, on which the sediments were laying, conditions and controls the structural arrangement of sedimentary formations. The formation of the South Paraba Grabn is associated with Cenozoic distensive movement which reactivated old features of crust weakness and generated previous cycles with normal characteristics. The environmental analysis is based on the integration of the existing methodology to characterise vulnerability of an universal pollutant and density fracture zone. The digital integration was processed using GIS (Geographic Information System) to delineate five defined vulnerability classes. The hydrogeological settings were analysed in each thematic map and, using fuzzy logic, an index for each different vulnerability class was compiled. Evidence maps could be combined in a series of steps using map algebra. PMID:12733812

  19. Rb-Sr and Sm-Nd whole rock analyses of basalts of the Grao Para Group, Serra dos Carajas, Brazil

    SciTech Connect

    Olszewski, W.J. Jr.; Gibbs, A.K.; Wirth, K.R.

    1985-01-01

    The Grao Para Group at Serra dos Carajas in the Guapore Shield of Brazil is a 6 km thick sequence of bimodal metavolcanic rock with interbedded iron formations. Rhyolites are a minor part of the low grade meta-volcanic section, with the bulk consisting of subalkaline basalt, basaltic andesite, and shoshonite. Rb-Sr whole rock analyses of 7 basalts yield an age of 2687 +/- 54 Ma. This agrees well with an age of 2758 +/- 39 Ma from zircon U-Pb analyses of the interbedded rhyolites. Except for the allocthonous Imataca Complex of Venezuela, these dates for the Grao Para Group are the first well-constrained Archean ages from the Amazonian Craton. An even older age for the basement to the Grao Para Group is also implied. Sm-Nd whole-rock analyses of four of these basalts did not yield an isochron because of the limited range of /sup 147/Sm//sup 144/Nd values, but element of/sub Nd/ values relative to CHUR were calculated using the Rb-Sr age. The typical LREE-enrichment, lack of Ce depletion or spilitic alteration of alkalies, and the high Sr initial ratios, may indicate that these isotopic patterns were derived by incorporation of some older continental crust in the mafic melts. These data together with an element of/sub Sr/ of +63.6 might indicate significant seawater exchange with volcanic rocks derived from mantle with chondritic REE patterns. This demonstrates the presence of significant continental crust in the Archean and seawater-volcanic rock interaction in a rifting environment similar to modern analogs.

  20. Morphometric and bioacoustic data on three species of Pseudopaludicola Miranda-Ribeiro, 1926 (Anura: Leptodactylidae: Leiuperinae) described from Chapada dos Guimares, Mato Grosso, Brazil, with the revalidation of Pseudopaludicola ameghini (Cope, 1887).

    PubMed

    Pansonato, Andr; Strssmann, Christine; Mudrek, Jessica Rhaiza; Martins, Itamar Alves

    2013-01-01

    Due to minute size, overall morphological similarities, scarcity of diagnostic characters after preservation, and usual sympatric or even syntopic occurrence of two or more species of Pseudopaludicola, the taxonomy of the genus is not yet a matter of consensus. Three species in the genus Pseudopaludicola Miranda-Ribeiro, 1926 were described by Cope in 1887, based on material obtained at Chapada dos Guimares, mid-western state of Mato Grosso, Brazil. One of these species, Pseudopaludicola ameghini, was subsequently synonymized to P. mystacalis. In this paper we present morphological and bioacoustic evidences supporting a full specific status for the three sympatric species of Pseudopaludicola described from Chapada dos Guimares, including Pseudopaludicola ameghini Cope, 1887. PMID:26120701

  21. An interdisciplinary knowledge translation intervention in long-term care: Study protocol for the vitamin D and osteoporosis study (ViDOS) pilot cluster randomized controlled trial

    PubMed Central

    2012-01-01

    Background Knowledge translation (KT) research in long-term care (LTC) is still in its early stages. This protocol describes the evaluation of a multifaceted, interdisciplinary KT intervention aimed at integrating evidence-based osteoporosis and fracture prevention strategies into LTC care processes. Methods and design The Vitamin D and Osteoporosis Study (ViDOS) is underway in 40 LTC homes (n = 19 intervention, n = 21 control) across Ontario, Canada. The primary objectives of this study are to assess the feasibility of delivering the KT intervention, and clinically, to increase the percent of LTC residents prescribed ≥800 IU of vitamin D daily. Eligibility criteria are LTC homes that are serviced by our partner pharmacy provider and have more than one prescribing physician. The target audience within each LTC home is the Professional Advisory Committee (PAC), an interdisciplinary team who meets quarterly. The key elements of the intervention are three interactive educational sessions led by an expert opinion leader, action planning using a quality improvement cycle, audit and feedback reports, nominated internal champions, and reminders/point-of-care tools. Control homes do not receive any intervention, however both intervention and control homes received educational materials as part of the Ontario Osteoporosis Strategy. Primary outcomes are feasibility measures (recruitment, retention, attendance at educational sessions, action plan items identified and initiated, internal champions identified, performance reports provided and reviewed), and vitamin D (≥800 IU/daily) prescribing at 6 and 12 months. Secondary outcomes include the proportion of residents prescribed calcium supplements and osteoporosis medications, and falls and fractures. Qualitative methods will examine the experience of the LTC team with the KT intervention. Homes are centrally randomized to intervention and control groups in blocks of variable size using a computer generated allocation sequence. Randomization is stratified by home size and profit/nonprofit status. Prescribing data retrieval and analysis are performed by blinded personnel. Discussion Our study will contribute to an improved understanding of the feasibility and acceptability of a multifaceted intervention aimed at translating knowledge to LTC practitioners. Lessons learned from this study will be valuable in guiding future research and understanding the complexities of translating knowledge in LTC. Trial registration ClinicalTrials.gov NCT01398527. PMID:22624776

  22. Geochemistry and petrogenesis of the Mesoarchean granites from the Canaã dos Carajás area, Carajás Province, Brazil: Implications for the origin of Archean granites

    NASA Astrophysics Data System (ADS)

    Feio, G. R. L.; Dall'Agnol, R.

    2012-12-01

    Four Mesoarchean (2.93 to 2.83 Ga) granite units, which encompass the Canaã dos Carajás, Bom Jesus, Cruzadão and Serra Dourada granites, were recognized in the Canaã dos Carajás area of the Archean Carajás Province. The Mesoarchean units are composed dominantly of biotite leucomonzogranites. They are compared with the Neoarchean Planalto suite (2.73 Ga) which encompasses biotite-hornblende monzogranites to syenogranites. The Canaã dos Carajás, Bom Jesus and the variety of the Cruzadão granite with higher (La/Yb)N are geochemically more akin to the calc-alkaline granites, whereas the other varieties of the Cruzadão granite are transitional between calc-alkaline and alkaline granites. The Serra Dourada granite has an ambiguous geochemical character with some features similar to those of calc-alkaline granites and other peraluminous granites. The Planalto granites have ferroan character, are similar geochemically to reduced A-type granites and show a strong geochemical contrast with the Mesoarchean studied granites. The Mesoarchean granites described in the Canaã dos Carajás area are geochemically distinct to those of the Rio Maria domain of the Carajás Province. The Canaã dos Carajás and Bom Jesus granites are similar to the high-Ca granites, whereas the Cruzadão and Serra Dourada are more akin to the low-CaO granites of the Yilgarn craton. The geochemical characteristics of the Mesoarchean studied granites approach those of the biotite granite group of Dharwar but the latter are enriched in HFSE and HREE compared to the Canaã dos Carajás granites. The Neoarchean Planalto suite granite has no counterpart in the Mesoarchean Rio Maria domain of the Carajás Province, neither in the Yilgarn and Dharwar cratons. Geochemical modeling suggests that partial melting of a source similar in composition to an Archean basaltic andesite of the Carajás Province could give origin to the Bom Jesus and Cruzadão granites. In the case of the Bom Jesus granite the residue of melting contained, in similar proportions, plagioclase, clinopyroxene, amphibole, and garnet, with subordinate ilmenite. The variations in (La/Yb)N and Sr/Y of the Cruzadão granite are controlled by changes in the residual melting phases. Garnet and amphibole are abundant in the residue of the variety with higher (La/Yb)N, whereas in the rocks with moderate to lower (La/Yb)N garnet is absent, magnetite appears in the residue and amphibole initially increases but is replaced by orthopyroxene in the rocks with the lowest (La/Yb)N. In the Canaã dos Carajás and Serra Dourada granites garnet was probably an absent phase in the residue of melting and the influence of amphibole was also apparently limited. A crustal environment and a variable pressure from 10 to 7-8 kbar are estimated for the generation of the granite magmas. The Bom Jesus and Cruzadão granites of Carajás derived from basaltic andesite sources and not of TTG and their geochemical contrasts can be explained by variation in the pressure of melting. The sources of Archean granite magmas are more diversified and could be more mafic than generally admitted.

  23. Identification of familial clustering for cancer through the family health strategy program in the municipality of Angra dos Reis, Rio de Janeiro, Brazil.

    PubMed

    Vieira, Daniela Koeller Rodrigues; Attianezi, Margareth; Esposito, Ana Carolina; Barth, Anneliese; Sequeira, Ceclia; Krause, Nathlia; Oliveira, Vivian; Lucidi, Alexandre; Serao, Cassio; Llerena, Juan C

    2015-01-01

    Identification of families with history of cancer in the municipality of Angra dos Reis, Rio de Janeiro (Brazil), through the Brazilian Unified Primary Health Care System was explored based in the Community Health Agents (CHA) program. This study was divided into two phases: a descriptive one with a cross-sectional epidemiological data of families with history of cancer based on CHA-collected data from home visits in four primary health care units. The second phase consisted in identifying familial clustering of three or more individuals with cancer through construction of a three-generation pedigree and revisited by an itinerant group of medical geneticists. Genetic counseling was carried out with the intent of selecting potential families at risk for hereditary familial cancers. In the first phase of the study, 1,581 families were interviewed by the CHA at their homes. A positive history for cancer was present in 42.3% of families, comprising 22.3% with only one case per family, 11.2% with two cases, and 8.6% with three or more cases in the family. The informant reported that 15% of the cases were from the father lineage, 12% from the mother lineage, and 12.1% within siblings. In the remaining 60.9% families, cancer was present in both sides of the family. The types of cancer reported were uterus 8.7% (n?=?137), stomach 7.7% (n?=?122), breast 6.9% (n?=?109), throat 6.8% (n?=?99), prostate 5.4% (n?=?85), lung 5.6% (n?=?88), bowel 3.7% (n?=?59), and unspecified sites in 6.8% (n?=?108) of families. No statistical differences were noted between the data collected on each primary care unit. In the second phase of the study, 136 families (2.9%) from the total of families interviewed in phase 1 were selected due to the presence of three or more individuals with cancer in the family. Among those, only 73 families attended genetic counseling. Comparison between the data obtained by the CHA and the medical geneticists shows complete agreement in 36 cases (49.3%), partial agreement in 25 cases (34.2%) with more detailed information in the CHA sheets, discordance in 4 cases (5.5%), and not possible to correlate in 8 cases due to identification inconsistency. Risk assessment for cancer was calculated based on the criteria adopted by Scheuner et al. (Genet Med 12(11):726-735, 2010) and revealed that 50.0% of the families were classified as having a weak risk, 36.1% a moderate risk, and 13.8% were considered of high risk. Concerning known hereditary cancer syndromes, we found one family that met the criteria for breast and ovary hereditary cancer (1.4%) and one family with non-polyposis hereditary colon cancer as revised by Bethesda protocol. Such preliminary results indicated that the Brazilian Primary Health Care system based on the CHA framework can be an effective entrance into the Unified Brazilian Health Care System (SUS-Brazil) for individuals with genetically determined diseases, such as familial cancer. Families with a history of three or more cases of cancer and considered of high risk for familial cancer could be referred to a tertiary health center for proper oncogenetic counseling. PMID:25063732

  24. Geochronological data from TTG-type rock associations of the Arroio dos Ratos Complex and implications for crustal evolution of southernmost Brazil in Paleoproterozoic times

    NASA Astrophysics Data System (ADS)

    Gregory, Tiago Rafael; Bitencourt, Maria de Fátima; Nardi, Lauro Valentim Stoll; Florisbal, Luana Moreira; Chemale, Farid, Jr.

    2015-01-01

    U-Pb isotope analyses by LA-MC-ICPMS (Laser Ablation - Multi Collector - Inductively Coupled Plasma Mass Spectrometry) in zircon crystals from metatonalites, tonalites and granodiorite gneiss from the Arroio dos Ratos Complex (ARC) early magmatism in southernmost Brazil are presented. The ARC is located in the eastern portion of the Sul-rio-grandense Shield, occurring as septa and roof pendants on granitoids emplaced along the Southern Brazilian Shear Belt (SBSB). The SBSB corresponds to a translithospheric structure composed of several anastomosed shear zones of dominantly transcurrent kinematics whose syntectonic magmatism, of Neoproterozoic age, is characteristic of post-collisional environments. The studied rocks comprise TTG-type associations with coeval mafic magmatism, deformed and metamorphosed within a ductile shear zone. Zircon crystals obtained from six samples are interpreted as igneous given that the crystals are subhedral to euhedral, bipyramidal, with concentric zonation, have ratios Th/U between 0.13 and 0.81 and have restricted evidence of overgrowth. The oldest Association 1 (A1) has structures compatible with recrystallization under conditions of high temperature and an igneous age of 2148 ± 33 Ma, obtained in a metatonalite. The rocks of Association 2 (A2) have similar compositions, although with a more significant coeval mafic fraction. They are intrusive into A1 and also show high-temperature recrystallization features. However, they are less deformed and partly preserve their primary, igneous fabric. The igneous ages obtained from two A2 tonalites are 2150 ± 28 Ma and 2136 ± 27 Ma. Association 3 (A3) is represented by tonalitic to granodioritic gneisses whose structure, composition and metamorphic features are similar to those of A1 rocks, except for the absence of coeval mafic magmas in the former. Local features resulting from partial melting are present in A3 rocks. Three samples from A3 were dated. A tonalitic gneiss gives igneous age of 2099 ± 10 Ma and two granodioritic gneisses give igneous ages of 2081 ± 7 Ma and 2077 ± 13 Ma. Restricted to A1, inheritance is represented by one subhedral, zoned, gently rounded zircon crystal interpreted as igneous, of 2732 ± 40 Ma (207Pb/206Pb age), with discordance of 9% and 232Th/238U ratio of 1.17. A single Neoproteozoic metamorphic date value was obtained from the rim of a zircon crystal of Paleoproterozoic core. The age of 635 ± 6 Ma (207Pb/206Pb age), with Th/U ratio < 0.1 and 1% discordance, is interpreted as compatible with adjacent SBSB magmatism. The three associations are interpreted to represent the record of successive magmatic pulses that mark the evolution of a Paleoproterozoic continental magmatic arc. In the study area, these magmatic arc associations represent relict areas partly reworked and relatively well-preserved from Neoproterozoic tectono-magmatic post-collisional events during the construction of the Southern Brazilian Shear Belt.

  1. Screening for pulmonary tuberculosis in Terespolis, RJ, Brazil: the search for respiratory symptomatic patients in emergency service of "Hospital das Clnicas de Terespolis Costantino Ottaviano, Fundao Educacional Serra dos Orgos".

    PubMed

    Siqueira-Batista, Rodrigo; Gomes, Andria Patrcia; Bisaglia, Joana B; Borlot, Paulo Estevo W; D'avila Junior, Heraldo X; Faria, Carolina Gonalves P P de; Braga, Bernardo D; Bezerra, Tiago S; Cedrola, Juan Pedro V; Almeida, Guilherme C; Couto, Llian S; Nacif, Marcelo; Crivano, Elvira

    2005-01-01

    The aim of the present study was to investigate the detection percentage of tuberculosis among patients that are respiratory symptomatic (TB suspects). In this work, we present the preliminary results of research carried out at "Hospital das Clnicas de Terespolis Costantino Ottaviano da Fundacao Educacional Serra dos Orgos (FESO)" from November 2003 to April 2004. Among the 40 respiratory symptomatic individuals identified and referred to the Tuberculosis Control Program in Terespolis , two (5.0%) were characterized as smear-positive. These results confirm reports in the literature and underscore the need for and importance of this strategy. PMID:15880227

  2. Characterization of a cAMP responsive transcription factor, Cmr (Rv1675c), in TB complex mycobacteria reveals overlap with the DosR (DevR) dormancy regulon

    PubMed Central

    Ranganathan, Sridevi; Bai, Guangchun; Lyubetskaya, Anna; Knapp, Gwendowlyn S.; Peterson, Matthew W.; Gazdik, Michaela; C. Gomes, Antonio L.; Galagan, James E.; McDonough, Kathleen A.

    2016-01-01

    Mycobacterium tuberculosis (Mtb) Cmr (Rv1675c) is a CRP/FNR family transcription factor known to be responsive to cAMP levels and during macrophage infections. However, Cmr's DNA binding properties, cellular targets and overall role in tuberculosis (TB) complex bacteria have not been characterized. In this study, we used experimental and computational approaches to characterize Cmr's DNA binding properties and identify a putative regulon. Cmr binds a 16-bp palindromic site that includes four highly conserved nucleotides that are required for DNA binding. A total of 368 binding sites, distributed in clusters among ∼200 binding regions throughout the Mycobacterium bovis BCG genome, were identified using ChIP-seq. One of the most enriched Cmr binding sites was located upstream of the cmr promoter, and we demonstrated that expression of cmr is autoregulated. cAMP affected Cmr binding at a subset of DNA loci in vivo and in vitro, including multiple sites adjacent to members of the DosR (DevR) dormancy regulon. Our findings of cooperative binding of Cmr to these DNA regions and the regulation by Cmr of the DosR-regulated virulence gene Rv2623 demonstrate the complexity of Cmr-mediated gene regulation and suggest a role for Cmr in the biology of persistent TB infection. PMID:26358810

  3. Characterization of a cAMP responsive transcription factor, Cmr (Rv1675c), in TB complex mycobacteria reveals overlap with the DosR (DevR) dormancy regulon.

    PubMed

    Ranganathan, Sridevi; Bai, Guangchun; Lyubetskaya, Anna; Knapp, Gwendowlyn S; Peterson, Matthew W; Gazdik, Michaela; C Gomes, Antonio L; Galagan, James E; McDonough, Kathleen A

    2016-01-01

    Mycobacterium tuberculosis (Mtb) Cmr (Rv1675c) is a CRP/FNR family transcription factor known to be responsive to cAMP levels and during macrophage infections. However, Cmr's DNA binding properties, cellular targets and overall role in tuberculosis (TB) complex bacteria have not been characterized. In this study, we used experimental and computational approaches to characterize Cmr's DNA binding properties and identify a putative regulon. Cmr binds a 16-bp palindromic site that includes four highly conserved nucleotides that are required for DNA binding. A total of 368 binding sites, distributed in clusters among ?200 binding regions throughout the Mycobacterium bovis BCG genome, were identified using ChIP-seq. One of the most enriched Cmr binding sites was located upstream of the cmr promoter, and we demonstrated that expression of cmr is autoregulated. cAMP affected Cmr binding at a subset of DNA loci in vivo and in vitro, including multiple sites adjacent to members of the DosR (DevR) dormancy regulon. Our findings of cooperative binding of Cmr to these DNA regions and the regulation by Cmr of the DosR-regulated virulence gene Rv2623 demonstrate the complexity of Cmr-mediated gene regulation and suggest a role for Cmr in the biology of persistent TB infection. PMID:26358810

  4. Determinação de elementos próprios dos asteróides troianos: comparação entre as teorias semi-analítica e sintética

    NASA Astrophysics Data System (ADS)

    Roig, F.; Beaugé, C.

    2003-08-01

    Além do cálculo semi-analítico de elementos próprios dos asteróides Troianos (Beaugé & Roig 2001, Icarus 153, 391), recentemente foi apresentado um novo conjunto destes elementos próprios determinado através de uma teoria sintética (Knenezevic & Milani 2003, comunicação pessoal). As bases de dados contendo estas determinações estão disponiveis na pagina web do Asteroid Dynamical Site (http://hamilton.dm.unipi.it/cgi-bin/astdys/astibo). Nesta comunicação apresentamos os primeiros resultados de um estudo comparativo entre ambos conjuntos de elementos próprios, analisando suas vantagens e desvantagens, assim como os limites de precisão de cada conjunto. Mostramos que os elementos próprios sintéticos são mais precisos que os smi-analíticos para grandes amplitudes de libração do ângulo s = l-lJup, embora acontece o contrario para os corpos cuja amplitude de libração é muito pequena. Finalmente discutimos a influencia destes erros na determinação de familias de asteroides e da estrutura resonante em torno dos pontos Lagrangeanos L4 e L5.

  5. Spectroscopic (FT-IR, 1H, 13C NMR, UV), DOS and orbital overlap population analysis of copper complex of (E)-4-(2-(4-nitrophenyl) diazenyl)-N, N bis ((pyridin-2-yl) methyl) benzamine by density functional theory

    NASA Astrophysics Data System (ADS)

    Diwaker

    2015-02-01

    The geometric parameters, chemical shifts, FTIR, NMR and orbital overlap population along with DOS (density of states) to know different kinds of interactions for binding of copper atom with (E)-4-(2-(4-nitrophenyl) diazenyl)-N, N bis ((pyridin-2-yl) methyl) benzamine to form its copper complex has been reported by DFT methods. The theoretically predicted values for structural parameters are in agreement with the experimentally reported values. NMR chemical shifts calculated using B3LYP/DFT/GIAO level of theory gives information about binding of copper atom with three nitrogen atoms namely N (3, 8 and 11). Orbital overlap population analysis using DFT/B3LYP/SDD level of theory is used to study the kind of interactions involved in binding of copper with the three nitrogen atoms. DOS studies are done to know about the contribution of alpha, beta electrons to the valence and conduction band. IR spectroscopy investigations gave the absorption bands for the formation of title compound. Electronic spectrum along with HOMO-LUMO energies of the title compound has been investigated using Time-dependent (TD-DFT) approach.

  6. Factores socio-económicos asociados a la percepción de situación socioeconómica entre adultos mayores de dos países latinoamericanos

    PubMed Central

    Brenes-Camacho, Gilbert

    2014-01-01

    El objetivo principal del artículo es estudiar la asociación entre la percepción subjetiva sobre la situación económica propia y una serie de medidas objetivas de bienestar socioeconómico –fuentes de ingresos, tenencia de vivienda, nivel educativo y transferencias familiares informales de dinero- entre adultos mayores de dos países Latinoamericanos: México y Costa Rica. Los datos se obtienen de las primeras rondas de dos encuestas sobre envejecimiento: CRELES para Costa Rica y ENASEM para México. La variable dependiente más importante se obtiene de las respuestas a las pregunta “¿Cómo califica su situación económica actual?” en Costa Rica y “¿Diría usted que su situación económica es…?” en México. Para ambas encuestas, las respuestas se codificaron en forma binaria; el código 0 representa las categorías Excelente, Muy buena y Buena, y el código 1 representa a las categorías Regular y Mala. Se encontró que el ingreso por jubilación es un importante determinante de la percepción de bienestar en ambos países. En Costa Rica, el ingreso del cónyuge y la tenencia de vivienda son importantes predictores de la percepción de bienestar, mientras que en México, los ingresos por transferencias están fuertemente asociados con dicha percepción. PMID:25360057

  7. Impact of natural climate change and historical land use on vegetation cover and geomorphological process dynamics in the Serra dos rgos mountain range in Rio de Janeiro State, Brazil

    NASA Astrophysics Data System (ADS)

    Nehren, U.; Sattler, D.; Heinrich, J.

    2010-03-01

    The Serra dos rgos mountain range in the hinterland of Rio de Janeiro contains extensive remnants of the Atlantic Forest (Mata Atlntica) biome, which once covered about 1.5 million km from Northeast to South Brazil and further inland to Paraguay and Argentina. As a result of historical deforestation and recent land use intensification processes today only 5 to 8% of the original Atlantic Forest remains. Despite the dramatic habitat loss and a high degree of forest fragmentation, the remnants are among the Earths most diverse habitats in terms of species richness. Furthermore, they are characterized by a high level of endemism. Therefore, the biome is considered a "hotspot of biodiversity". In the last years many efforts have been taken to investigate the Mata Atlntica biome in different spatial and time scales and from different scientific perspectives. We are working in the Atlantic Forest of Rio de Janeiro since 2004 and focus in our research particularly on Quaternary landscape evolution and landscape history. By means of landscape and soil archives we reconstruct changes in the landscape system, which are mainly the result of Quaternary climate variability, young tectonic uplift and human impact. The findings throw light on paleoecological conditions in the Late Quaternary and the impact of pre-colonial and colonial land use practices on these landscapes. In this context, a main focus is set on climate and human-driven changes of the vegetation cover and its consequences for the geomorphological process dynamics, in particular erosion and sedimentation processes. Research methods include geomorphological field studies, interpretation of satellite images, physical and chemical sediment and soil analyses as well as relative and absolute dating (Feo/Fed ratio and 14C dating). For the Late Quaternary landscape evolution, the findings are compared with results from paleoclimatic and paloecological investigations in Southeast and South Brazil using other dating techniques, such as pollen analysis. The impact of early civilizations on deforestation, forest fragmentation and geomorphological process dynamics is estimated on the basis of archaeological and anthropological findings. Furthermore, historical sources, such as written documents, maps, paintings and photographs, were collected and analysed to get a more detailed picture of the younger landscape history. As a result we present a landscape genetic model for the Late Quaternary in the Serra dos rgos mountain range and the Guanabara Basin. Based on a functional analysis of the natural process dynamics we reconstruct the human impact on the vegetation cover and related erosion and sedimentation processes in different time periods. According to this, the polycyclic climate fluctuations in the Pleistocene emerge as periods of stability and instability in the landscape system. During dry and cool periods of the Ice Ages forests drew back and erosion processes increased, causing higher erosion and deposition rates on slopes and stronger incision of river beds, accompanied by a deposition of gravels. The colluvial soils presently found in the mountain region were mainly deposited during the last instability period in the Late Pleistocene (Wisconsin) and Early Holocene. With the return of rainforests from their retreats under wetter climate conditions in the mid Holocene, slopes were stabilized under a dense vegetation cover. In the Late Holocene erosion conditions changed again with human deforestation and land use, which led to high erosion rates in the mountainous landscape. Concerning the human impact on rainforests and geomorphological process dynamics we give an overview of the pre-historical (Sambaqui, Tupi) and historical (colonial exploitation cycles) landscape transformation and degradation processes for different landscape units within the Serra dos rgos and its floodplains. The results not only give a detailed picture of historical land use patterns and landscape degradation processes, but also contribute to the understanding of rece

  8. DOS/Russian - US program overview

    SciTech Connect

    Pifer, M.L.

    1996-04-01

    This paper describes the organization and describes the objectives for the science and technology agreements between the U.S.A. and Russia. The Gore-Chernomyrdin Commission objectives and the Civilian Research and the Development Foundation for the Independent States of the former Soviet Union (CRDF) are discussed.

  9. 27 CFR 9.175 - Dos Rios.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...; (3) Iron Peak, California—Mendocino County, 1967 edition, revised 1994; and (4) Covelo West... then westerly along the meandering 2,000-foot contour line, crossing Big Water Canyon, Doghouse Creek... between the Laytonville and Iron Peak maps, and, returning to the Iron Peak map, continue along...

  10. 27 CFR 9.175 - Dos Rios.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... contour line and Poonkinny Road, proceed southerly and then easterly along the meandering 2,000-foot contour line to its intersection with the eastern boundary of section 2, T21N, R13W, immediately south of... then westerly along the meandering 2,000-foot contour line, crossing Big Water Canyon, Doghouse...

  11. 27 CFR 9.175 - Dos Rios.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... contour line and Poonkinny Road, proceed southerly and then easterly along the meandering 2,000-foot contour line to its intersection with the eastern boundary of section 2, T21N, R13W, immediately south of... then westerly along the meandering 2,000-foot contour line, crossing Big Water Canyon, Doghouse...

  12. 27 CFR 9.175 - Dos Rios.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... contour line and Poonkinny Road, proceed southerly and then easterly along the meandering 2,000-foot contour line to its intersection with the eastern boundary of section 2, T21N, R13W, immediately south of... then westerly along the meandering 2,000-foot contour line, crossing Big Water Canyon, Doghouse...

  13. 27 CFR 9.175 - Dos Rios.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... contour line and Poonkinny Road, proceed southerly and then easterly along the meandering 2,000-foot contour line to its intersection with the eastern boundary of section 2, T21N, R13W, immediately south of... then westerly along the meandering 2,000-foot contour line, crossing Big Water Canyon, Doghouse...

  14. Pepita Talks Twice = Pepita habla dos veces.

    ERIC Educational Resources Information Center

    Lachtman, Ofelia Dumas

    This illustrated bilingual children's book (English and Spanish), relates the story of Pepita, a young Hispanic girl who is fluent in both Spanish and English. Pepita always helps when asked to talk for others in Spanish and English. But one day Pepita decides she doesn't want to help anymore. She wants to hurry and get home from school before her

  15. Privatized Housing Dos and Don'ts.

    ERIC Educational Resources Information Center

    Milshtein, Amy

    2003-01-01

    Offers tips for higher education institutions on navigating the relationship with a privatized student housing developer: don't assume the project costs nothing, do understand the difference between your goals and the developer's, do create a feasibility study, don't treat every relationship the same, do put the student first, and don't forget the…

  16. Evolution of the Astronomy Concepts Along Basic Education Cycle. (Breton Title: Evoluo dos Conceitos de Astronomia no Decorrer da Educao Bsica.) La Evolucin de los Conceptos de Astronoma Durante la Educacin Bsica

    NASA Astrophysics Data System (ADS)

    Darroz, Luiz Marcelo; da Rosa, Cleci Werner; Becker da Rosa, lvaro; Samudio Prez, Carlos Ariel

    2014-07-01

    Although astronomy is considered one of the older sciences of humanity and that the understanding of its concepts has brought tremendous advances to Science and therefore, to society, it is observed that a significant portion of people live outside of this kind of knowledge. According to the Parmetros Curriculares Nacionais for basic education, it is the school responsibility the dissemination of scientifically correct concepts, including those related to astronomy. Concerning this issue, we present a survey of 140 students of ninth grade of elementary school and 120 third-grade high-school students from four schools in the region of Passo Fundo/RS. We sought to determine, through a questionnaire consisting of open and multiple choice questions, the knowledge of this group of students about the basic terms and astronomical phenomena, and also verify that the hit rate increases as they advance through the different and progressive grades of primary and secondary education. Overall, the results show that the teaching of astronomy in basic education is facing problems. Of the 20 issues investigated, in 17 the indicators are similar in the correct answers given by students for elementary and middle school, revealing that many misconceptions still remain along basic education. This demonstrates that such issues are not - or are rarely - covered during these two school levels. Thus, we conclude that the discussion of concepts related to astronomy should receive greater emphasis on approaching different subjects, requiring a national action in support of their teaching. It is believed that a national action should be supported by a triple pillar of collective actors: the scientific community, semi-professional astronomy community and the school community. Finally, this pillar would be the basis for future discussions related to the performance of these protagonists as a means to promote active changes in the curricular structure, providing, in more effective ways, the learning of astronomy in basic education. Embora a astronomia seja considerada uma das cincias mais antigas da humanidade e ainda que a compreenso de seus conceitos tenha trazido enormes avanos para a Cincia e, consequentemente, para a sociedade, observa-se que uma parcela significativa de pessoas encontra-se margem desses conhecimentos. De acordo com os Parmetros Curriculares Nacionais para a Educao Bsica, cabe escola a difuso dos conceitos cientificamente corretos, entre eles os relacionados rea de astronomia. Pertinente a essa questo, apresenta-se uma pesquisa realizada com 140 estudantes do nono ano do ensino fundamental e com 120 estudantes da terceira srie do ensino mdio de quatro escolas da regio de Passo Fundo/RS. Buscou-se averiguar, por meio de um questionrio composto de questes abertas e de mltipla escolha, o conhecimento desse grupo de estudantes acerca de termos e fenmenos astronmicos bsicos e, tambm, verificar se o ndice de acertos cresce medida que eles avanam nas diferentes e gradativas sries dos ensinos fundamental e mdio. De modo geral, os resultados apresentados demonstram que o ensino de astronomia na educao bsica enfrenta deficincias. Das 20 questes investigadas, em 17 os ndices de acertos so semelhantes nas respostas dadas por estudantes de nvel fundamental e mdio, revelando que muitas concepes equivocadas permanecem ao longo da educao bsica. Isso evidencia que tais temas no so - ou so pouco - abordados durante esses dois nveis de escolarizao. Assim, conclui-se que a discusso dos conceitos relacionados com a astronomia deve receber maior nfase na abordagem dos diferentes contedos, sendo necessria uma ao nacional em prol do seu ensino. Acredita-se que essa ao nacional deve estar apoiada em um pilar triplo de atores coletivos: comunidade cientfica, comunidade astronmica semiprofissional e comunidade escolar. Por fim, esse pilar seria a base para futuras discusses relacionadas atuao dessas instncias como meio de promover mudanas ativistas na estrutura curricular, proporcionando, mais efetivamente, a educao em astronomia no ensino bsico. Si bien la astronoma es considerada una de las ciencias ms antiguas de la humanidad y aunque la comprensin de sus conceptos haya trado enormes avances para la ciencia y, consecuentemente, para la sociedad, se observa que una parte significativa de personas se encuentran al margen de estos conocimientos. De acuerdo con los Parmetros Curriculares Nacionales para la Educacin Bsica, corresponde a la escuela la difusin de los conceptos cientficamente correctos, entre ellos los relacionados al rea de astronoma. Sobre esta cuestin, se presenta una investigacin realizada con 140 estudiantes del noveno ao de la enseanza fundamental y con 120 estudiantes del tercer ao de la enseanza de nivel medio de cuatro escuelas de la regin de Passo Fundo/RS. Se pretenda averiguar, por medio de un cuestionario compuesto de preguntas abiertas y de opcin mltiple, el conocimiento de este grupo de alumnos sobre trminos y fenmenos astronmicos bsicos y, tambin, si el ndice de aciertos crece en la medida que los alumnos avanzan a los diferentes y sucesivos aos de la enseanza fundamental y media. De modo general, los resultados demuestran que la enseanza de astronoma en la educacin bsica muestra deficiencias. De los 20 asuntos investigados, 17 revelan ndices de aciertos semejantes en las respuestas dadas por los estudiantes de nivel bsico y medio, mostrando que muchas concepciones equivocadas permanecen a lo largo de la educacin bsica. Esto hace evidente que estos temas no son - o son poco - abordados durante esos niveles de escolarizacin. As, puede concluirse que la discusin de los conceptos relacionados a la astronoma debe recibir un mayor nfasis en cuanto al abordaje de los diferentes contenidos, siendo necesaria una accin nacional en pro de su enseanza. Es necesario destacar que esa accin nacional debe estar apoyada en un pilar triple de actores colectivos: comunidad cientfica, comunidad de astronoma semi profesional y la comunidad escolar. En fin, ese pilar sera la base para futuras discusiones relacionadas a la actuacin de esas instancias como va para promover cambios en la estructura curricular, proporcionando ms efectivamente, la educacin en astronoma en la enseanza de nivel bsico.

  17. Tritium ((3)H) as a tracer for monitoring the dispersion of conservative radionuclides discharged by the Angra dos Reis nuclear power plants in the Piraquara de Fora Bay, Brazil.

    PubMed

    de Carvalho Gomes, Franciane; Godoy, Jos Marcus; de Carvalho, Zenildo Lara; de Souza, Elder Magalhes; Rodrigues Silva, Jos Ivan; Tadeu Lopes, Ricardo

    2014-10-01

    Presently, two nuclear power plants operate in Brazil. Both are located at Itaorna beach, Angra dos Reis, approximately 133km from Rio de Janeiro city. The reactor cooling circuits require the input of seawater, which is later discharged through a pipeline into the adjacent Piraquara de Fora Cove. The radioactive effluents undergo ion-exchange treatment prior to their release in batches, causing the enrichment of (3)H relative to other radionuclides in the discharged waters. Under steady state conditions, the (3)H gradient in the Piraquara de Fora waters can be used to determine the dependence of the dilution factor on the distance from the discharge point. The present work describes experiments carried out at the reactor site during batch release episodes, including time series sampling at the discharge point and surface seawater sampling every 250mto a distance of 1250m, after a double distillation, the (3)H concentration was measured by liquid scintillation counting applying a Quantulus liquid scintillation spectrometer. The obtained results showed a linear relationship between the (3)H concentration and distance from the discharge point. At 1250mfrom the discharge point a dilution index of 1:15 was measured which fits the expected value based on modeling. PMID:24959753

  18. ANÁLISE DA INSERÇÃO DOS TEMAS DE HUMANIDADES E ÉTICA, COM METODOLOGIA DE APRENDIZAGEM BASEADA EM PROBLEMAS, EM CURRICULO MÉDICO INTEGRADO EM ESCOLA PÚBLICA NO DISTRITO FEDERAL, BRASIL

    PubMed Central

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

    2009-01-01

    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%-α=0,034, pvalue=0,007). Unidade de habilidades e atitudes: freqüência das 3 temáticas no currículo da 1a a 4a séries (IC95%-α=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%-α=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

  19. Simulao de ejees de massa coronal

    NASA Astrophysics Data System (ADS)

    Corsini, M. A.; Silva, A. V. R.

    2003-08-01

    Ejees de massa coronal (EMC) so bolhas gigantes de gs permeadas por campos magnticos que so ejetadas do Sol durante um perodo de vrias horas. Caso estas ejees atinjam a Terra, geralmente, causam uma srie de distrbios s comunicaes de longa distncia e navegao, alm de danos a satlites e transformadores. Portanto, desejvel que sejamos capazes de prever quando estas ejees atingiro a Terra. Para tanto, necessrio um bom entendimento dos mecanismos causadores das ejees e, principalmente, de como se d a propagao das EMC e sua interao com o vento solar que permeia o meio interplanetrio. Nesse sentido foi desenvolvido um programa computacional para resolver as equaes MHD (Magneto-Hidro-Dinmica) que regem a evoluo das EMC. Primeiramente foram estabelecidas as condies necessrias para descrever o vento solar, no estado estacionrio, que permeia todo o meio interplanetrio. Num primeiro momento, resolveu-se o sistema de equaes para o caso do vento isotrmico, conhecida como a soluo de Parker, a fim de testarmos o modelo. Ento, foi considerado o caso do vento solar com temperatura varivel no meio interplanetrio. Este resultado foi utilizado como a base de nosso sistema em seu instante inicial. Posteriormente foram feitas as consideraes necessrias para descrever a propagao da Ejeo de Massa Coronal. As EMC foram simuladas como um aumento de densidade e temperatura local na coroa solar. A rbita e a posio da Terra foram includas no sistema. Os dados gerados possibilitaram uma anlise da evoluo da EMC pelo meio interplanetrio at encontrar-se com a Terra. Os perfis de densidade e temperatura a 1 Unidade Astronmica so comparados com os dados de satlites reportados na literatura.

  20. Difficulties of First Years Elementary School Teachers with the Teaching of Astronomy. (Breton Title: Dificuldades de Professores dos Anos Iniciais do Ensino Fundamental em Relao ao Ensino da Astronomia. ) Dificultades de LOS Profesores de los Primeros Aos de la Escuela Primaria en Relacin a la Enseanza de la Astronoma

    NASA Astrophysics Data System (ADS)

    Langhi, Rodolfo; Nardi, Roberto

    2005-12-01

    This paper reports Primary School teachers' discourses analysis about their difficulties related to the teaching of Astronomy. It reports partial data of a master's level research carried out in the last two years, named "An exploratory study for inserting Astronomy in primary school teachers' education" (LANGHI, 2004). The study took into consideration students' and teachers' common sense conceptions about astronomical phenomena, conceptual mistakes in textbooks, and Astronomy's suggestions given by the PCN (Parmetros Curriculares Nacionais - The Brazilian National Curriculum Standards). The paper aims to characterize teachers' difficulties, in order to provide subsides to the implementation of an initial or continuing education program. This study is justified by the fact that courses plans like these only will be adapted to the teacher's (and students') reality, if there is a primary investigation about what the teachers really need to know about Astronomy. This fact was possible here by the enunciations interpretation of a teachers' sample using semi-structured interviews, according to discourse analysis procedures. The research outcomes show difficulties related to factors like: those of personal order, methodological, on teacher's formation, educational infrastructure and other related to information sources for educators. Este artigo, que relata as dificuldades de professores em relao ao ensino da Astronomia, faz parte de um estudo exploratrio para a insero da Astronomia na formao de professores dos anos iniciais do Ensino Fundamental. Esse estudo leva em considerao as concepes alternativas de alunos e professores sobre fenmenos astronmicos, os erros conceituais em livros didticos e as sugestes de contedos de Astronomia constantes nos PCN (Parmetros Curriculares Nacionais). Caracterizar as dificuldades dos professores a questo central deste texto, apontando para o objetivo de contribuir com subsdios para um futuro programa de formao continuada neste tema. O estudo se justifica mediante o fato de que planejamentos de cursos como estes s se adequaro realidade do professor (e do aluno) se houver uma investigao antecipada sobre o que os docentes precisam saber e saber fazer a respeito da Astronomia, o que se concretizou em nosso caso pela interpretao dos discursos de uma amostra de professores coletados atravs de entrevistas semi-estruturadas, utilizando para interpretao os princpios e mtodos da anlise do discurso em sua linha francesa. Os resultados da pesquisa indicaram dificuldades de ordem pessoal, metodolgica, de formao, de infra-estrutura e outras relacionadas s fontes de informaes para docentes. Este artculo que relata las dificultades de los profesores en relacin a la enseanza da laAstronoma es parte de un estudio preliminar para la implantacin dela Astrnoma enla formacin de profesores de ls primeros aos del ciclo primario.El estudio considera las concepciones alternativas de alumnos y profesores respecto a los fenmenos astronmicos, los errores conceptuales en los libros didcticos y las sugerencias de contenidos de Astronoma que constan en los Parmetros Curriculares Nacionales del Brasil. Caracterizar las dificultades de los profesores constituye la cuestin central de este texto, apuntando para el objetivo de contribuir para un futuro programa de educacin contnua en este tema. El estudio se justifica mediante el hecho que la planificacin de cursos de este tipo solo se adecuarn a la realidade del profesor (y del alumno) si existe una investigacin anterior a respecto de lo que los docentes precisan saber y saber realizar en Astronoma, lo cual se concret en nuestro caso por medio de la interpretacin de los discursos de una muestra de profesores obtenidos atravs de entrevistas semiestructuradas, utilizand para esta interpretacin los principios y mtodos de anlisis del discurso en su lnea francesa. Los resultados mostraron dificultades de orden personal, metodolgica, formativa, de infraestructura y otras relacionadas a las fuentes de informacin para los docentes.

  1. Divorce Matters: Visitation Dos and Don'ts

    MedlinePLUS

    ... ways to make visitation successful. For visitation to work, both parents need to accept and acknowledge that their children have two homes—one with their father and one with their mother. Parents need to make sure that their children ...

  2. Face mask ventilation--the dos and don'ts.

    PubMed

    Wood, Fiona E; Morley, Colin J

    2013-12-01

    Face mask ventilation provides respiratory support to newly born or sick infants. It is a challenging technique and difficult to ensure that an appropriate tidal volume is delivered because large and variable leaks occur between the mask and face; airway obstruction may also occur. Technique is more important than the mask shape although the size must appropriately fit the face. The essence of the technique is to roll the mask on to the face from the chin while avoiding the eyes, with a finger and thumb apply a strong even downward pressure to the top of the mask, away from the stem and sloped sides or skirt of the mask, place the other fingers under the jaw and apply a similar upward pressure. Preterm infants require continuous end-expiratory pressure to facilitate lung aeration and maintain lung volume. This is best done with a T-piece device, not a self-inflating or flow-inflating bag. PMID:24041823

  3. Web-Based Mathematics: Some "Dos" and "Don'ts"

    ERIC Educational Resources Information Center

    Loong, Esther Yook-Kin

    2011-01-01

    This case study describes an "out of field" teacher's use of the Internet to teach a range of mathematical topics in a modified Year 8 mathematics class. It highlights the importance of three factors for implementing a discernible web-based teaching strategy: appropriate choice of web objects, effective "virtual" pedagogy, and technical support…

  4. ORAMUS(DOS). Ozone Risk AssessMent Utilities

    SciTech Connect

    Whitfield, R.G.; Jusko, M.J.; Biller, W.F.

    1998-12-01

    ORAMUS is a user-friendly, menu-driven software system that calculates and displays user-selected risk estimates for health effects attributable to short-term exposure to tropospheric ozone. Inputs to the risk assessment are estimates of exposure to ozone and exposure-response relationships to produce overall risk estimates in the form of probability distributions. Three fundamental models are included: headcount risk, benchmark risk, and hospital admissions. Exposure-response relationships are based on results of controlled human exposure studies. Exposure estimates are based on the EPA`s probabilistic national ambient air quality standards (NAAQS) exposure model, pNEM/Osub3, which simulates air quality associated with attainment of alternative NAAQS. Using ORAMUS, risk results for 27 air quality scenarios, air quality in 9 urban areas, 33 acute health endpoints, and 4 chronic health endpoints can be calculated.

  5. Dos Hermanas Chicanas: Overcoming Barriers to Professional Advancement

    ERIC Educational Resources Information Center

    Prospero, Moises

    2007-01-01

    Women and ethnic minorities face steep barriers to professional advancement, and those who rise to the executive level typically use a variety of strategies to overcome obstacles in their way. This study first reviewed the literature on barriers to professional advancement for women and ethnic minorities and the strategies that they report using…

  6. Los Dos Mundos: Rural Mexican Americans, Another America.

    ERIC Educational Resources Information Center

    Baker, Richard

    This book explores race relations between Mexican Americans and Anglo Americans in "Middlewest," a fictitious name for an actual rural Idaho community with the highest proportion of Mexican Americans in the state. Many Mexican Americans in this predominantly agricultural area are current or former migrant workers. The first chapter describes field

  7. Dos and Don'ts for Beginning Teachers.

    ERIC Educational Resources Information Center

    Armstrong, Coleen

    1993-01-01

    Beginning teachers are advised to pace themselves; provide disciplinary options; learn to justify their teaching; be tolerant about student gripes; use the Socratic method to elicit thoughtful responses; refrain from killing discussion, solving students' personal problems, and insulting students' intelligence; listen to veteran teachers; begin

  8. Detecção da fase impulsiva de uma explosão solar gigante até 405 GHz

    NASA Astrophysics Data System (ADS)

    Raulin, J.-P.; Makhmutov, V.; Kaufmann, P.; Pacini, A. A.; Luethi, T.; Hudson, H. S.; Gary, D. E.; Yoshimori, M.

    2003-08-01

    A explosão ocorrida no dia 25/08/2001 foi uma das mais intensas do presente ciclo solar em ondas de rádio de altas frequências. Foram medidas em ondas milimétricas e submilimétricas, aproximadamente, 105 e vários milhares de unidades de fluxo solar, respectivamente. Apresentamos um estudo deste evento em múltiplas frequências, desde microondas (1GHz), até ondas submilimétricas (405 GHz) detectadas pelo Telescópio Solar para ondas Submilimétricas (SST). Esta base de dados foi complementada utilizando-se o experimento Yohkoh, incluindo a emissão em raios-X duros e raios-g (até 100 MeV), e imagens em raios-X moles da região ativa envolvida. Enfocamos e discutimos principalmente os seguintes aspectos da fase impulsiva do evento: (i) as implicações deduzidas do espectro eletromagnético, obtido pela primeira vez até 405 GHz; (ii) a dinâmica da região ativa. Os resultados mostram que para explicar o espectro rádio observado, são necessários entre 3.5×1037 e 1.5×1039 elétrons acelerados acima de 20 keV em uma região de campo magnético entre 300 e 800 Gauss. A estimativa do fluxo de fótons que seria produzido por estes elétrons, mostra que grande parte deles não precipitou na baixa atmosfera. A evolução temporal da emissão em raios-X moles revela que a configuração magnética da região ativa foi muito dinâmica durante a fase impulsiva da explosão. Em particular, mostramos que a produção dos elétrons altamente energéticos foi iniciada junto com a aparição, na baixa coroa solar, de um novo sistema compacto de estruturas magnéticas. Este fato sugere que os locais de aceleração estão localizados na baixa atmosfera do Sol, como resultado da interação entre o novo sistema compacto e o campo magnético ambiente da região ativa.

  9. Establishing the Empirical Relationship Between Non-Science Majoring Undergraduate Learners' Spatial Thinking Skills and Their Conceptual Astronomy Knowledge. (Spanish Title: Estableciendo Una Relación Empírica Entre el Razonamiento Espacial de los Estudiantes de Graduación de Carreras no Científicas y su Conocimento Conceptual de la Astronomía.) Estabelecendo Uma Relação Empírica Entre o RacioCínio Espacial dos Estudantes de Graduação EM Carreiras Não Científicas e Seu Conhecimento Conceitual da Astronomia

    NASA Astrophysics Data System (ADS)

    Heyer, Inge; Slater, Stephanie J.; Slater, Timothy F.

    2013-12-01

    The astronomy education community has tacitly assumed that learning astronomy is a conceptual domain resting upon spatial thinking skills. As a first step to formally identify an empirical relationship, undergraduate students in a non-major introductory astronomy survey class at a mediumsized, Ph.D. granting, mid-western US university were given pre- and post-astronomy conceptual diagnostics and spatial reasoning diagnostics, Instruments used were the "Test Of Astronomy Standards" and "What Do You Know?" Using only fully matched data for analysis, our sample consisted of 86 undergraduate non-science majors. Students' normalized gains for astronomy surveys were low at .26 and .13 respectively. Students' spatial thinking was measured using an instrument designed specifically for this study. Correlations between the astronomy instruments' pre- to post-course gain scores and the spatial assessment instrument show moderate to strong relationships suggesting the relationship between spatial reasoning and astronomy ability can explain about 25% of the variation in student achievement. La comunidad de educación en astronomía ha supuesto de forma tácita que el aprendizaje de la astronomía consiste en un dominio conceptual fundamentado en el razonamiento espacial. Como un primer paso para identificar formalmente una relación empírica entre estas dos cosas, utilizamos como muestra los estudantes de graduación de carreras no científicas de un curso experimental en una universidad norteamericana del medioeste de porte mediano con programa de Doctorado em curso, en el cual estos estudiantes se sometieron a un diagnóstico de razonamiento espacial y conceptos astronómicos antes e después del mismo. Las herramientas utilizadas fueron el Test Of Astronomy Standards (TOAST) y el cuestionario What do you know? Utilizando solo los datos completamente consistentes para este análisis, nuestra muestra consistió en 86 estudantes de graduación. Las mejoras, depués de normalizadas, en el desempeño de los estudiantes en estos dos asuntos foram pequenas, 0.26 e 0.13 respectivamente. El razonamiento espacial de los estudiantes fue medido utilizando un instrumento específico desarrollado para este trabaljo. Las correlaciones entre los resultados de los tests astronómicos y este instrumento específico, antes y después del curso mostraron una relación entre moderada y fuerte, sugiriendo que la relación entre el razonamiento espacial y el conocimiento astronómico puede explicar hasta un 25% de la variación em el desempeño de los estudiantes. A comunidade da educação em astronomia tem suposto de forma implícita que o aprendizado da astronomia consiste em um domínio conceitual fundamentado no raciocínio espacial. Como um primeiro passo para identificar formalmente uma relação empírica entre estas duas coisas, utilizamos como amostra os estudantes de graduação de carreiras não científicas de um curso exploratório em uma universidade norte-americana do meio-oeste de médio porte com programa de Doutorado em andamento, onde estes estudantes foram submetidos a um diagnóstico de raciocino espacial e conceitos astronômicos antes e depois do mesmo. As ferramentas utilizadas foram o Test Of Astronomy Standards (TOAST) e o questionário What do you know? Utilizando somente dados completamente consistentes para esta análise, nossa amostra consistiu de 86 estudantes de graduação. As melhoras, depois de normalizadas, do desempenho dos estudantes nos dois quesitos foram pequenas, 0.26 e 0.13 respectivamente. O raciocínio espacial dos estudantes foi medido utilizando um instrumento específico desenhado para este trabalho. As correlações entre os resultados dos testes astronômicos e este instrumento específico antes e depois do curso mostraram uma relação entre moderada e forte, sugerindo que a relação entre o raciocínio espacial e o conhecimento astronômico pode explicar até um 25% na variação no desempenho dos estudantes.

  10. Influencias africanas na lingua brasileira dos terreiros (African Influences in Brazilian Language of the Voodoo Rites).

    ERIC Educational Resources Information Center

    Megenney, William W.

    1991-01-01

    Discusses how determination of lexical items with Sub-Saharan origin in songs of voodoo rites of candomble and umbanda in southern and northeastern Brazil is complicated by factors like existence of phonological correspondence without accompanying semantic correspondence, difficulty of determining meaning of word in a given text, and high

  11. Use of elephant grass for energy production in Campos dos Goytacazes-RJ, Brazil.

    PubMed

    Daher, R F; Souza, L B; Gravina, G A; Machado, J C; Ramos, H C C; Silva, V Q R; Menezes, B R S; Schneider, L S A; Oliveira, M L F; Gottardo, R D

    2014-01-01

    Elephant grass is a tropical forage plant widely distributed throughout Brazil. It was first exclusively used in the livestock sector as cattle feed. The grass is characterized by its high productivity and photosynthetic capacity and is considered as an alternative source of renewable energy. Here, we estimated the general combining ability of the parents and specific combining ability of the hybrids based on morpho-agronomic biomass-quality traits. The experiment was conducted in a randomized block design with 3 replicates. The diallel was composed of 16 hybrids and 2 groups of genitors. In the diallel analysis of variance, we observed a significant difference among treatments. A significant difference was observed among genitors for dry matter production (DMP). For the general combining ability of group 1, the traits leaf blade width, DMP, height, percentage of neutral detergent fiber, percentage of hemicellulose, percentage of lignin, percentage of acid detergent fiber, and percentage of cellulose were significant. For the estimates of general combining ability of DMP, parents Porto Rico 534-B, Vruckwona, Taiwan A-146, and Mercker S. E. A. were 0.4748, 3.2819, 1.1659, and 0.4317. The parents of Mercker S. E. A. and Porto Rico 534-B produced the highest percentage of detergent fiber and percentage of lignin with values of 0.1482 and 0.0856. Thus, parents Vruckwona, Porto Rico 534-B, and Taiwan A-146 are promising for integration into breeding programs. The best hybrid combinations for DMP were 1 x 5, 1 x 8, 2 x 6, 3 x 7, and 4 x 5. PMID:25526210

  12. A social media primer for professionals: digital dos and don'ts.

    PubMed

    Bernhardt, Jay M; Alber, Julia; Gold, Robert S

    2014-03-01

    Social media sites have become powerful and important tools for health education, promotion, and communication activities as they have dramatically grown in popularity. Social media sites also offer many features that can be used for professional development and advancement. When used wisely and prudently, social media sites and platforms offer great potential for professional development by building and cultivating professional networks, as well as sharing information to increase one's recognition and improve one's reputation. They also provide a medium for increasing one's knowledge and awareness of timely news and trends by following important organizations, opinion leaders, and influential professionals. When used unwisely and imprudently, there is the potential to delay, damage, or even destroy one's professional and personal life. In this commentary, we offer recommendations for using Facebook, LinkedIn, and Twitter for professional development and caution against online behaviors that may have negative professional consequences. In summary, we believe that the strengths and benefits of social media for professional advancement and development far outweigh the risks and encourage health promotion professionals to properly engage these powerful tools. PMID:24396119

  13. Dos and Don'ts of Giving OTC Cough and Cold Medicines to Your Child

    MedlinePLUS

    ... symptoms your child has. For example, if your child only has a runny nose, don’t pick a ... should get better quickly, and OTC medicines are only meant for short-term use. If your child has been taking an OTC medicine for several ...

  14. "Being Present in the World": A Conversation with Professor Jose Marques dos Santos

    ERIC Educational Resources Information Center

    Katz, Richard N.; Dodds, Ted

    2008-01-01

    The University of Porto was awarded the European University Information Systems (EUNIS) Elite Award for its innovative application of information technology to a European university. This university--nearly one hundred years old--is pressing hard, on a number of fronts, to place itself in the top rank of European universities. The Rector of the

  15. The Puerto Ricans--Two Communities, One Culture. (Los Puertorriquenos--Dos Comunidades, Una Cultura.)

    ERIC Educational Resources Information Center

    Vivo, Paquita

    1980-01-01

    Puerto Rican roots stem from the ethnic mixture of Indians, Europeans, and Africans. This article describes the advent of each of the groups on the island, the historical and cultural impact each made, and the retention of heritage among Puerto Rican migrants to the U.S. (DS)

  16. Buscando Su Voz en Dos Culturas = Finding Your Voice in Two Cultures.

    ERIC Educational Resources Information Center

    Cline, Zulmara

    1998-01-01

    An administrator/former teacher ponders difficulties of living in two cultures: a professional world that respects her degrees and credentials and a Latina world that questions pursuit of the "American dream." Although she used her American voice to coax a Latina student back to school, she sympathized with the mother's family-centered aspirations…

  17. Projeto do sistema anti-ressonante da fiao dos transdutores para o detector Mario Schenberg

    NASA Astrophysics Data System (ADS)

    Vieira, S. J.., Jr.; Melo, J. L.

    2003-08-01

    O detector de ondas gravitacionais Mario Schenberg est sendo projetado e construdo pelo grupo Grviton. Sua construo est ocorrendo no Laboratrio de Estado Slido e Baixas Temperaturas (LESBT) da Universidade de So Paulo, na cidade de So Paulo. Esse detector possui uma massa ressonante esfrica de cobre-alumnio, com 65 cm de dimetro, pesando aproximadamente 1150 Kg, suspensa por um sistema de isolamento vibracional, que se encontra em fase de testes preliminares. A real eficcia desse sistema, entretanto, s poder ser comprovada quando o detector estiver aparelhado com, pelo menos, um transdutor eletromecnico de altssima sensibilidade acoplado massa ressonante. Neste momento, no s este sistema de isolamento vibracional ser posto em teste, como o do projeto da fiao que transporta os sinais de microondas at os transdutores e destes para a pr-amplificao. Apesar dessa fiao ter sido projetada para no apresentar nenhum contato com a superfcie esfrica da antena, de maneira a no haver nenhuma transmisso de rudo vibracional do laboratrio para esta, deve-se minimizar o rudo microfnico produzido nessa fiao por oscilaes mecnicas, uma vez que ela no utiliza nenhum sistema de isolamento vibracional. Com o intuito de resolver este problema, projetamos uma estrutura, formada por pequenos cilindros conectados por barras, a qual no ter nenhuma ressonncia mecnica na faixa de freqncias de interesse para deteco (3000 - 3400 Hz). Desta forma, as vibraes nessa faixa no sero amplificadas. O projeto foi feito usando iterativamente, de maneira a otimizar os resultados obtidos, o programa de elementos finitos Msc/Nastran. Atravs de simulaes feitas neste programa, determinamos os parmetros geomtricos ideais a serem utilizados, os quais proporcionam a maior regio espectral de interesse livre de ressonncias.

  18. Buscando Su Voz en Dos Culturas = Finding Your Voice in Two Cultures.

    ERIC Educational Resources Information Center

    Cline, Zulmara

    1998-01-01

    An administrator/former teacher ponders difficulties of living in two cultures: a professional world that respects her degrees and credentials and a Latina world that questions pursuit of the "American dream." Although she used her American voice to coax a Latina student back to school, she sympathized with the mother's family-centered aspirations

  19. Entre dos mundos/between two worlds: bicultural development in context.

    PubMed

    Bacallao, Martica L; Smokowski, Paul R

    2009-07-01

    How do Mexican immigrant adolescents balance different, and often oppositional, cultural influences in the acculturation process? In this article, we explore how acculturating adolescents absorb cultural messages and go about creating their (multiple) identities. Guided by Alternation Theory, in-depth qualitative interviews were conducted with 12 undocumented Mexican adolescents and 14 of their parents who had immigrated to North Carolina within the past 7 years. All of the families had adolescent children who were born in Mexico. At least one parent and one adolescent from each family were interviewed. Interviewing multiple family members allowed us to examine how bicultural development progressed differently for various family members, and how the whole family balanced between cultural systems. Mexican parents and adolescents were acculturating while trying to resist assimilation pressures. They maintained strong Mexican identities that were preserved by practicing Mexican customs, values, and traditions in their homes and churches. Meeting U.S. cultural and linguistic demands at work and in school placed Mexican parents and adolescents between the two cultural systems. This prompted adolescents and parents to integrate some U.S. customs, language, or social behaviors into their daily lives, increasing bilingualism and, in some cases, biculturalism. PMID:19408123

  20. Home before You Know It = De regres en casa en un dos por tres.

    ERIC Educational Resources Information Center

    Vida Health Communications, Inc., Cambridge, MA.

    The arrival of a newborn requires a great deal of adjustment. Intended for new and expectant parents, this booklet and companion video provide practical advice and hands-on demonstrations of the essentials of mother and baby care, from birth to the first visit to the pediatrician. The first part of the booklet, which comes in both English- and

  1. Home before You Know It = De regres en casa en un dos por tres.

    ERIC Educational Resources Information Center

    Vida Health Communications, Inc., Cambridge, MA.

    The arrival of a newborn requires a great deal of adjustment. Intended for new and expectant parents, this booklet and companion video provide practical advice and hands-on demonstrations of the essentials of mother and baby care, from birth to the first visit to the pediatrician. The first part of the booklet, which comes in both English- and…

  2. Unidad: Las influencias culturales en el arte mexicana (Unit: Cultural Influences in Mexican Art). Dos semanas.

    ERIC Educational Resources Information Center

    Finere, Neal

    This two-week unit, appropriate for bilingual education settings as well as foreign language programs, deals with the three primary cultural influences found in Mexican contemporary art. The multisensory materials, pragmatic focus, and direct creative student involvement are designed to make it a microcosmic, real-life experience. The first part

  3. The "Dos and Don'ts" of Writing a Journal Article

    ERIC Educational Resources Information Center

    Kekale, Tauno; de Weerd-Nederhof, Petra; Cervai, Sara; Borelli, Massimo

    2009-01-01

    Purpose: During work as reviewers and editors of journals authors are often faced the same types of problems in many articles. The purpose of this piece is to give some guidelines on typical problems that lead to rejection, and how to avoid these. Design/methodology/approach: The paper discusses journal article design and offers some methodology…

  4. The "Dos and Don'ts" of Writing a Journal Article

    ERIC Educational Resources Information Center

    Kekale, Tauno; de Weerd-Nederhof, Petra; Cervai, Sara; Borelli, Massimo

    2009-01-01

    Purpose: During work as reviewers and editors of journals authors are often faced the same types of problems in many articles. The purpose of this piece is to give some guidelines on typical problems that lead to rejection, and how to avoid these. Design/methodology/approach: The paper discusses journal article design and offers some methodology

  5. Entre Dos Mundos/Between Two Worlds: Bicultural Development in Context

    ERIC Educational Resources Information Center

    Bacallao, Martica L.; Smokowski, Paul R.

    2009-01-01

    How do Mexican immigrant adolescents balance different, and often oppositional, cultural influences in the acculturation process? In this article, we explore how acculturating adolescents absorb cultural messages and go about creating their (multiple) identities. Guided by Alternation Theory, in-depth qualitative interviews were conducted with 12

  6. Dos Idiomas, Un Mundo. Dual Language Project. Title VII Biennial Evaluation Report, 1995-97.

    ERIC Educational Resources Information Center

    Ernest, Harishini M.; Gonzalez, Rosa M.

    This is an evaluation of the first 2 years of a 5-year comprehensive Bilingual Education grant funded by Title VII Part A of the Improving America's Schools Act of 1994 in the Austin Independent School District (AISD) (Texas). The grant awarded to the AISD funds a program of Developmental Bilingual Education at two elementary schools where more

  7. Unidad: Las influencias culturales en el arte mexicana (Unit: Cultural Influences in Mexican Art). Dos semanas.

    ERIC Educational Resources Information Center

    Finere, Neal

    This two-week unit, appropriate for bilingual education settings as well as foreign language programs, deals with the three primary cultural influences found in Mexican contemporary art. The multisensory materials, pragmatic focus, and direct creative student involvement are designed to make it a microcosmic, real-life experience. The first part…

  8. Land disposal of San Luis drain sediments, Panoche Water District, South Dos Palos, California

    SciTech Connect

    Zawislanski, Peter; Benson, Sally; TerBerg, Robert; Borglin, Sharon

    2002-07-01

    Lawrence Berkeley National Laboratory (LBNL), LFR Levine-Fricke (LFR), the U.S. Bureau of Reclamation (USBR) and the Panoche Water District, have completed a pilot-scale test of the viability of land application of selenium- (Se-) enriched San Luis Drain (SLD) sediments. The project was initiated in October 1998 by LBNL. LFR assumed the role of primary subcontractor on the project in July 2001. Substantial portions of this report, describing work performed prior to November 2000, were previously prepared by LBNL personnel. The data set, findings, and recommendations are herein updated with information collected since November 2000. Local land disposal is an attractive option due to its low cost and the proximity of large areas of available land. Two modes of disposal are being tested: (1) the application to a nearby SLD embankment, and (2) the application to and incorporation with nearby farm soils. The study of these options considers the key problems that may potentially arise from this approach. These include disturbance of SLD sediments during dredging, resulting in increased downstream Se concentrations; movement of the land-applied Se to groundwater; reduced productivity of farm crops; and Se uptake by wild and crop plants. This report describes field and laboratory activities carried out from 1998 through February 2002, and results of these investigations.

  9. NASA Glen Steady-State Heat Pipe Code Users Manual, DOS Input. Version 2

    NASA Technical Reports Server (NTRS)

    Tower, Leonard K.

    2000-01-01

    The heat pipe code LERCHP has been revised, corrected, and extended. New features include provisions for pipes with curvature and bends in "G" fields. Heat pipe limits are examined in detail and limit envelopes are shown for some sodium and lithium-filled heat pipes. Refluxing heat pipes and gas-loaded or variable conductance heat pipes were not considered.

  10. Ensuring the relocatability of programs in the operational system DOS YeS

    NASA Technical Reports Server (NTRS)

    Novoseltsev, S. K.; Orlov, I. G.; Chesalin, A. S.

    1979-01-01

    Specific modifications in the Disk Operational System Unified Series to insure the relocatability of programs stored permanently in the core image library is described. A self-relocating method for loading programs into the working memory with re-editing all the programs recorded in the core image library is presented. The modified linkage editor can be included in a relocation dictionary containing data about each address constant at the assembly stage at the request of the programmer. The relocation dictionary increases the dimension of the RL-phase in comparison with the dimension of this same phase when edited by the standard method, making possible the creation of multiphase program complexes. Generation and use of the modified system using Assembly language is described. An example of the use of the system is given, and limitations of the use of the relocatable programs in the modified system are outlined.

  11. Apparent Motion of the Sun, Shadows of Objects and Measurement of Time in the View of Seventh Grade Students of Middle School. (Breton Title: Movimento Aparente do Sol, Sombras dos Objetos e Medição do Tempo na Visão de Alunos do Sétimo Ano do Ensino Fundamental.) Movimiento Aparente del Sol, Sombras de los Objetos y Medición del Tiempo en la Visión de Estudiantes del Séptimo Grado del Ciclo Pirmario

    NASA Astrophysics Data System (ADS)

    Iria Machado, Daniel

    2013-07-01

    The apparent motion of the Sun on the celestial sphere and the behavior of the shadows of objects over time are observable phenomena in everyday life. However, students often do not have a proper understanding of such occurrences, and can even display misconceptions about them. Therefore, we performed a research in order to know students' notions about these subjects and to evaluate the contribution to their understanding brought about by an activity performed with an interactive sundial in an informal learning environment. We investigated the ideas of 43 students from the seventh grade of middle school by applying a test with open questions before and after an activity with an analemmatic sundial, conducted by a monitor. A significant proportion of students were initially unaware of most of the phenomena treated. The intervention performed helped the students to assimilate new concepts, providing the contact with new phenomena and to a lesser degree, the development of explanations about them, indicating an educational potential of this action. However, the contribution to the understanding of some of the ideas explored was small, pointing to the need to make additional observations, studies and discussions. O movimento aparente do Sol na esfera celeste e o comportamento das sombras dos objetos com o passar do tempo são fenômenos observáveis no dia a dia. No entanto, muitas vezes os estudantes não possuem uma compreensão adequada de tais ocorrências, podendo inclusive exibir concepções alternativas a seu respeito. Por isso, efetuou-se uma pesquisa com o intuito de conhecer as noções dos alunos sobre esses temas e avaliar a contribuição para seu entendimento propiciada por uma atividade feita com um relógio de Sol interativo, em um ambiente de ensino informal. Foram investigadas as ideias de 43 alunos do sétimo ano do Ensino Fundamental mediante a aplicação de um teste com questões abertas antes e depois de uma atividade com um relógio de Sol analemático, conduzida por um monitor. Uma proporção significativa de estudantes desconhecia inicialmente a maioria dos fenômenos tratados. A intervenção realizada colaborou para uma parte dos alunos assimilar novos conceitos, propiciando o contato com novos fenômenos e, em menor grau, a elaboração de explicações a respeito destes, indicando um potencial educativo dessa ação. Porém, a contribuição para o entendimento de algumas das ideias exploradas foi pequena, apontando para a necessidade de se fazer observações, estudos e discussões complementares. El movimiento aparente del Sol en la esfera celeste y el comportamiento de las sombras de los objetos a lo largo del tiempo son fenómenos observables en la vida cotidiana. Sin embargo, los estudiantes a menudo no tienen una adecuada comprensión de dichos problemas, e incluso pueden mostrar conceptos erróneos acerca de ellos. Por lo tanto, se realizó una investigación a fin de conocer las nociones de los estudiantes acerca de estas cuestiones y evaluar la contribución a su comprensión proporcionada por una actividad realizada con un reloj de Sol interactivo, en un entorno informal de aprendizaje. Se investigaron las ideas de 43 estudiantes del séptimo grado del ciclo primario mediante la aplicación de un test con preguntas abiertas antes y después de una actividad con un reloj de Sol analemático, dirigida por un monitor. Una proporción significativa de los estudiantes inicialmente desconocía la mayoría de los fenómenos tratados. La intervención realizada contribuyó para que los estudiantes asimilasen nuevos conceptos, proporcionando el contacto con nuevos fenómenos y, en menor medida, desarrollasen explicaciones acerca de estos, lo que indica un potencial educativo de esta acción. Sin embargo, la contribución a la comprensión de algunas de las ideas exploradas fue pequeña, lo que apunta a la necesidad de hacer observaciones, estudios y debates adicionales.

  12. Hybrid Identity in Academic Writing: "Are There Two of Me?" (Identidad híbrida: "¿hay dos yo?")

    ERIC Educational Resources Information Center

    Crawford, Troy; Lengeling, Martha; Mora Pablo, Irasema; Heredia Ocampo, Rocío

    2014-01-01

    This paper explores the construction of identity in an academic learning environment in Central Mexico, and shows how identity may be linked to non-language factors such as emotions or family. These issues are associated with elements of hybrid identity. To analyze this we draw on language choice as a tool used for the construction of identity and…

  13. Buen Comienzo, Buen Futuro: El Bebe de Dos Meses (Healthy Start, Grow Smart: Your Two-Month-Old).

    ERIC Educational Resources Information Center

    Department of Education, Washington, DC.

    Distributed by the U.S. Departments of Agriculture, Education, and Health and Human Services, this Spanish-language pamphlet provides parents with information and advice about their infants in the second month of life. The pamphlet outlines typical infant behavior at 2 months of age, the need for regular visits to a physician, health insurance,

  14. [Dos and don'ts for crystalloids in intensive care medicine. Can too much water be bad?].

    PubMed

    Wildenauer, R

    2015-04-01

    Notwithstanding the use of colloids, crystalloids have a firm position in today's intensive care: In addition to the substitution as a basic requirement of the human organism or drug carriers, they are primarily used for volume replacement. A common complication is the development of interstitial edema, which is due to the composition of these solutions and the permeability of the glycocalyx.With the large variety available on the market, bicarbonate-based precursor isotonic-balanced full electrolyte solutions have become established in the meantime. The use of 0.9% saline solution is regarded as obsolete. With low cost and a good safety profile, a few relevant aspects, e.g., the risk of hypervolemia and electrolyte imbalance, must be taken into account in the use of crystalloids. PMID:25786391

  15. The Dos and Don'ts of how to Build a Planet, Using the Moon as an Example

    NASA Technical Reports Server (NTRS)

    Jones, J. H.

    2006-01-01

    The bulk chemical compositions of planets may yield important clues concerning planetary origins. Failing that, bulk compositions are still important, in that they constrain calculation of planetary mineralogies and also constrain the petrogenesis of basaltic magmas. In the case of the Earth, there is little or no debate about the composition of the Earth's upper mantle. This is because our sample collections contain peridotitic xenoliths of that mantle. The most fertile of these are believed to have been little modified from their primary compositions. Using these samples and chondritic meteorites as a starting point, small perturbations on the compositions of existing samples allow useful reconstruction of the bulk silicate Earth (BSE). Elsewhere, I have argued that the next simplest case is the Eucrite Parent Body (EPB). Reconstructions based on Sc partitioning indicate that the EPB can be well approximated by a mixture of 20% eucrite and 80% equilibrium olivine. This leads to a parent body that is similar to CO (or devolatilized CM) chondrites. Partial melting experiments on CM chondrites confirm this model, because the residual solids in these experiments are dominated by olivine with minor pigonite [3]. The most difficult bodies to reconstruct are those that have undergone the most differentiation. Both the Moon and Mars may have passed through a magma ocean stage. In any event, lunar and martian basalts, unlike eucrites, were not derived from undifferentiated source regions. Reconstructions are primarily based on compositional trends within the basalts themselves with some critical assumptions: (i) Refractory lithophile elements (Ca, Al, REE, actinides) are presumed to be in chondritic relative abundances; and (ii) some major element ratio is believed to exist in a chondritic ratio (e.g., Mg/Si, Mg/Al). The most commonly used parameter is Mg/Si.

  16. Computer Aided Drafting Packages for Secondary Education. Edition 2. PC DOS Compatible Programs. A MicroSIFT Quarterly Report.

    ERIC Educational Resources Information Center

    Pollard, Jim

    This report reviews eight IBM-compatible software packages that are available to secondary schools to teach computer-aided drafting (CAD). Software packages to be considered were selected following reviews of CAD periodicals, computers in education periodicals, advertisements, and recommendations of teachers. The packages were then rated by

  17. GLOBAL CHANGE RESEARCH NEWS #9: ORD PROVIDES TECHNICAL SUPPORT TO EPA/OIA & DOS INITIATIVE IN EGYPT

    EPA Science Inventory

    This ninth edition reports on a workshop on global climate change that was held in Cairo, Egypt, on May 10-12, 1999. The workshop represented a successful partnership between EPA's Office of International Affairs, Office of Research and Development (ORD), Office of Air and Radiat...

  18. Cornell Produces a Video of Safety Dos and Don'ts for the YouTube Set

    ERIC Educational Resources Information Center

    Lipka, Sara

    2008-01-01

    Don't drink too much, download pirated files, light candles, or prop open doors. Warnings like those pervade the weighty work of admonition known as the student handbook. However, Allen J. Bova wonders, "Who ever reads that?" So Mr. Bova, director of risk management and insurance at Cornell University, tried to reach students with a video. This…

  19. The DOS 1 neutron dosimetry experiment at the HB-4-A key 7 surveillance site on the HFIR pressure vessel

    SciTech Connect

    Farrell, K.; Kam, F.B.; Baldwin, C.A.

    1994-01-01

    A comprehensive neutron dosimetry experiment was made at one of the prime surveillance sites at the High Flux Isotope Reactor (HFIR) pressure vessel to aid radiation embrittlement studies of the vessel and to benchmark neutron transport calculations. The thermal neutron flux at the key 7, position 5 site was found, from measurements of radioactivation of four cobalt wires and four silver wires, to be 2.4 {times} 10{sup 12} n{center_dot}m{sup {minus}2}{center_dot}s{sup {minus}1}. The thermal flux derived from two helium accumulation monitors was 2.3 {times} 10{sup 12} n{center_dot}m{sup {minus}2}{center_dot}{sup {minus}1}. The thermal flux estimated by neutron transport calculations was 3.7 {times} 10{sup 12} n{center_dot}m{sup {minus}2}s{sup {minus}1}. The fast flux, >1 MeV, determined from two nickel activation wires, was 1.5 {times} 10{sup 12} n{center_dot}m{sup {minus}2}{center_dot}s{sup {minus}1}, in keeping with values obtained earlier from stainless steel surveillance monitors and with a computed value of 1.2 {times} 10{sup 13} n{center_dot}m{sup {minus}2}{center_dot}{sup {minus}1}. The fast fluxes given by two reaction-product-type monitors, neptunium-237 and beryllium, were 2.6 {times} 10{sup 13} n{center_dot}m{sup {minus}2}{center_dot}s {sup {minus}1} and 2.2 {times} 10{sup 13} n{center_dot}m{sup {minus}2}s{sup {minus}1}, respectively. Follow-up experiments indicate that these latter high values of fast flux are reproducible but are false; they are due to the creation of greater levels of reaction products by photonuclear events induced by an exceptionally high ratio of gamma flux to fast neutron flux at the vessel.

  20. Protective Action Evaluator for Chemical Emergencies: A user's manual (MS-DOS reg sign Version 1. 0)

    SciTech Connect

    Rogers, G.O.; Sharp, R.D.

    1990-10-01

    The protective action evaluator for chemical emergencies (PAECE) is a package of computer programs developed to simulate an emergency response to airborne release of chemical agents. This user's manual documents the use of PAECE in the evaluation of chemical agent emergencies in areas potentially affected by the Chemical Stockpile Emergency Planning Program (CSEPP). This research documents the development and use of a method for the evaluation of protective action alternatives in conjunction with potential chemical agent emergencies. The user's manual highlights the development of the PAECE model, the selection of appropriate parameters to represent various scenarios, generate results and interpret them in the analysis of protective action alternatives during the planning and preparedness phases of the CSEPP. The PAECE model is designed to evaluate protective actions in the context of potential accidents, the emergency management systems required to implement protective actions, and the anticipated consequences for human receptors. The implications and uncertainties of the model are discussed to provide potential users with insight into the use, limitations, and uncertainties associated with evaluating the effectiveness of protective action alternatives. While PAECE represents a unique and powerful tool to evaluate protective actions, the user must exercise caution when interpreting the results to avoid misrepresentation. The expected value interpretation of the PAECE results biases the results toward extreme values. Hence, the PAECE results have to be interpreted in the context exposures similar to those represented by the unprotected exposure and the protection capacity that tend to be associated with people completing the implementation of the required actions later than and earlier than average, respectively. 16 refs., 24 figs., 1 tab. (JF)

  1. 76 FR 58074 - 30-Day Notice of Proposed Information Collection: DS-7001 and DS-7005, DOS-Sponsored Academic...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-09-19

    ..., DS-7005. Respondents: Applicants for the Academic Exchange Program. Estimated Number of Respondents: 7160 (For DS-7001, 3842 estimated; for DS-7005, 3318 estimated). Estimated Number of Responses: 7160 (For DS-7001, 3842 estimated; for DS-7005, 3318 estimated). Average Hours per Response: 0.75....

  2. 76 FR 25733 - 60-Day Notice of Proposed Information Collection: DS-7001 and DS-7005, DOS-Sponsored Academic...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-05-05

    .... Respondents: Applicants for the Academic Exchange Program. Estimated Number of Respondents: 7160 (For DS-7001, 3842 estimated; for DS-7005, 3318 estimated). Estimated Number of Responses: 7160 (For DS-7001, 3842 estimated; for DS-7005, 3318 estimated). Average Hours per Response: 0.75. Total Estimated Burden:...

  3. Cozinha: Um Lugar para a "bildung" dos Educadores (The Kitchen: A Place for the "bildung" of Educators).

    ERIC Educational Resources Information Center

    Damiano, Gilberto

    2000-01-01

    Uses a kitchen metaphor for philosophy of education, in dialogue with Augustine, Erasmus of Rotterdam, Brillat-Savarin, and others. Mixes and cooks ingredients in thinking: the centrality of the human being, corporeality, historicity, and transcendency; food as sign-symbol; eating-linguistic habits; educator-cook; space of the kitchen; sensuality,

  4. First approach to studies of sulphur electron DOS in prostate cancer cell lines and tissues studied by XANES

    NASA Astrophysics Data System (ADS)

    Kwiatek, Wojciech M.; Czapla, Joanna; Podgrczyk, Magdalena; Kisiel, Andrzej; Konior, Jerzy; Balerna, Antonella

    2011-10-01

    Urological cancers comprise approximately one-third of all cancers diagnosed in men worldwide and out of these, prostate cancer is the most common one ( WHO World Cancer Report, 2008). Several risk factors such as age, hormone levels, environmental conditions and family history are suspected to play a role in the onset of this disease of otherwise obscure aetiology. It is therefore the medical need that drives multidisciplinary research in this field, carried out by means of various experimental and theoretical techniques. Out of many relevant factors, it is believed that sulphur can take an important part in cancer transformations. We have investigated the prostate cancer cell lines and tissues, along with selected organic and inorganic compounds used as references, by the X-ray absorption fine structure spectroscopy near the sulphur edge energy region. Particularly, the comparison of the experimental results collected during XANES measurements and theoretical calculations of electron density of states with use of the FEFF8 code and LAPW (linearised augmented plane-wave) method has been performed and in this work the first results of our studies are presented.

  5. A new generation of real-time DOS technology for mission-oriented system integration and operation

    NASA Technical Reports Server (NTRS)

    Jensen, E. Douglas

    1988-01-01

    Information is given on system integration and operation (SIO) requirements and a new generation of technical approaches for SIO. Real-time, distribution, survivability, and adaptability requirements and technical approaches are covered. An Alpha operating system program management overview is outlined.

  6. Cornell Produces a Video of Safety Dos and Don'ts for the YouTube Set

    ERIC Educational Resources Information Center

    Lipka, Sara

    2008-01-01

    Don't drink too much, download pirated files, light candles, or prop open doors. Warnings like those pervade the weighty work of admonition known as the student handbook. However, Allen J. Bova wonders, "Who ever reads that?" So Mr. Bova, director of risk management and insurance at Cornell University, tried to reach students with a video. This

  7. Stratigraphy of the Pleistocene, phonolitic Co Grande Formation on Santo Anto, Cape Verde

    NASA Astrophysics Data System (ADS)

    Eisele, S.; Freundt, A.; Kutterolf, S.; Ramalho, R. S.; Kwasnitschka, T.; Wang, K.-L.; Hemming, S. R.

    2015-08-01

    The Co Grande Formation (CGF) on the western plateau of Santo Anto Island is part of the younger volcanic sequence that originated from both, basanitic and nephelinitic magmatic suites, respectively called COVA and COROA suites. Based on our detailed revised stratigraphy of the CGF, including two yet unknown tephra units, we can show that both suites produced multiple, highly differentiated eruptions over a contemporaneous period. Correlations of CGF tephras with marine ash layers provide distal dispersal data for Co Grande I (CG I) and also identify two highly explosive, phonolitic eruptions that pre-date the CGF tephra deposits known on land. Within the CGF, the lowermost, 220 7 ka old unit Canudo Tephra (CT; COVA suite) comprises phonolitic fall deposits and ignimbrites; it is partly eroded and overlain by debris flow deposits marking a hiatus in highly differentiated eruptions. The phonolitic CG I Tephra (COROA suite) consists of an initial major Plinian fall deposit and associated ignimbrite and terminal surge deposits. This is immediately overlain by the phonolitic to phono-tephritic Co Grande II (CG II; COVA suite), a complex succession of numerous fallout layers and density-current deposits. CG I and CG II have radiometric ages of 106 3 ka and 107 15 ka, respectively, that are identical within their error limits. The youngest CGF unit, the Furninha Tephra (FT; COROA suite), consists of three foidic-phonolitic fall deposits interbedded with proximal scoria deposits from a different vent. The phonolitic eruptions switched to and fro between both magmatic suites, in each case with a stronger first followed by a weaker second eruption. Each eruption evolved from stable to unstable eruption columns. During their terminal phases, both magma systems also leaked evolved dome-forming lavas next to the tephras. Distal ashes increase the CG I tephra volume to ~ 10 km3, about twice the previously published estimate. The tephra volume of CG II is ~ 3 km3; CT and FT are too poorly exposed for volume estimation. The characteristics of the CGF tephra units outline hazard conditions that may be expected from future evolved explosive eruptions on the western plateau of Santo Anto.

  8. Effect of sediment composition on methane concentration and production in the transition zone of a mangrove (Sepetiba Bay, Rio de Janeiro, Brazil).

    PubMed

    Marinho, C C; Campos, E A; Guimarães, J R D; Esteves, F A

    2012-08-01

    The aim of this research was to evaluate the effect of sediment composition on methane (CH4) dynamics in sediments of different areas in the transition zone between a mangrove and the sea. This research was conducted in a mangrove at Coroa Grande, on the southern coast of Rio de Janeiro. Samples were collected at three stations: (1) region colonised by Rhizophora mangle L. on the edge of the mangrove, (2) region colonised by seagrasses and (3) infra-littoral region without vegetation. Samples were collected from the surface layer of the sediment to determine the concentrations of nutrients (C, N and P) and CH4 concentration and production. We observed that concentrations of CH4 and carbon (C) were significantly higher (p < 0.05) in station 1 than station 3. The molar ratios (C:N, C:P and N:P) suggest that the origin of the substrate is mainly autochthonous. Methanogenesis was initially low, possibly due to competition between methanogens and sulfate reducers, and increased significantly (p < 0.05) on the twenty-sixth day in the sediment of station 1, probably due to higher organic matter (OM) availability in this region. Results indicate that methanogenic activity observed herein is not regulated by the amount or quality of OM, but by other factors. The concentration of CH4 in the sea-land ecotone at Mangrove Coroa Grande is a function of available OM suggesting a possible inhibition of methanotrophy by intense oxygen consumption in the soil surface covered by detritus of Rhizophora mangle vegetation. PMID:22990811

  9. Net ecosystem production, calcification and CO2 fluxes on a reef flat in Northeastern Brazil

    NASA Astrophysics Data System (ADS)

    Longhini, Cybelle M.; Souza, Marcelo F. L.; Silva, Ananda M.

    2015-12-01

    The carbon cycle in coral reefs is usually dominated by the organic carbon metabolism and precipitation-dissolution of CaCO3, processes that control the CO2 partial pressure (pCO2) in seawater and the CO2 fluxes through the air-sea interface. In order to characterize these processes and the carbonate system, four sampling surveys were conducted at the reef flat of Coroa Vermelha during low tide (exposed flat). Net ecosystem production (NEP), net precipitation-dissolution of CaCO3 (G) and CO2 fluxes across the air-water interface were calculated. The reef presented net autotrophy and calcification at daytime low tide. The NEP ranged from -8.7 to 31.6 mmol C m-2 h-1 and calcification from -13.1 to 26.0 mmol C m-2 h-1. The highest calcification rates occurred in August 2007, coinciding with the greater NEP rates. The daytime CO2 fluxes varied from -9.7 to 22.6 μmol CO2 m-2 h-1, but reached up to 13,900 μmol CO2 m-2 h-1 during nighttime. Carbon dioxide influx to seawater was predominant in the reef flat during low tide. The regions adjacent to the reef showed a supersaturation of CO2, acting as a source of CO2 to the atmosphere (from -22.8 to -2.6 mol CO2 m-2 h-1) in the reef flat during ebbing tide. Nighttime gas release to the atmosphere indicates a net CO2 release from the Coroa Vermelha reef flat within 24 h, and that these fluxes can be important to carbon budget in coral reefs.

  10. How Do You Say "Twos" in Spanish, if "Two" Is "Dos"? Language as Means and Object in a Bilingual Kindergarten Classroom

    ERIC Educational Resources Information Center

    Mulvihill, Naomi

    2014-01-01

    In this essay Naomi Mulvihill uses vignettes from her bilingual kindergarten classroom to explore the dynamic processes by which young children make sense of language, focusing on instances in which she asks her students to compare texts presented in English and Spanish. Using Piaget's concept of disequilibrium as a guiding framework,…

  11. En Busqueda de la Escuela del Siglo XXI: Dos Experiencias de Autoaprendizaje (In Search of the 21st Century School: Two Self-Learning Experiences).

    ERIC Educational Resources Information Center

    Schiefelbein, Ernesto; And Others

    This book is a contribution to the dialogue that is maintained today around the problems of education. The book contains four parts: (1) "In Search of the 21st Century School. Can the Colombian New School (EN) Show Us the Way?"; (2) "Experimentation with Self-Learning Materials in Two Schools in Conchali (Chile)"; (3) "Self-Learning Module for the…

  12. Neodymium, strontium and chromium isotopic studies of the LEW86010 and Angra dos Reis meteorites and the chronology of the angrite parent body

    NASA Technical Reports Server (NTRS)

    Nyquist, L. E.; Bansal, B.; Wiesmann, H.; Shih, C.-Y.

    1994-01-01

    Neodymium, stontium, and chromium isotopic studies of the LEW86010 angrite established its absolute age and the formation interval between its crystallization and condensation of Allende CAIs from the solar nebula. Pyroxene and phosphate were found to contain approximately 8% of its Sm and Nd inventory. A conventional Sm-147-Nd-143 isochron yielded an age of 4.53 +/- 0.04 Ga (2 sigma and Epsilon(sub Nd sup 143)) = 0.45 +/- 1.1. An Sm-146-Nd-142 isochron gives initial Sm-146/Sm-144 = 0.0076 +/- 0.0009 and Epsilon (sub Nd sup 142) = -2.5 +/- 0.4. The Rb-Sr analyses give initial Sr-87/Sr-86 Iota(sub Sr sup 87) = 0.698972 +/- 8 and 0.698970 +/- 18 for LEW and ADOR, respectively, relative to Sr-87/Sr-86 = 0.71025 for NBS987. The difference, Delta Iota(sub Sr Sup 87), between Iota (sub sr sup 87) for the angrites and literature values for Allende CAIs, corresponds to approximately Ma of growth in a solar nebula with a CI chondrite value of Rb-87/Sr-86 = 0.91, or approximately 5 Ma in a nebula with solar photospheric Rb-87/Sr-86 = 1.51. Excess Cr-53 from extinct Mn-53(t(sub 1/2) = 3.7 Ma)in LEW86010 corresponds to initial Mn-53/Mn-55 = 4.4 +/- 1.0 x 10(exp -5) for the inclusions as previously reported by the Paris group (Birck and Allegre, 1988). The Sm-146/Sm-144 value found for LEW86010 corresponds to solar system initial (Sm-146/Sm-144) = 0.0080 +/- 0.0009 for crystallization 8 Ma after Allende, the difference between Pb-Pb ages of angrites and Allende, or 0.0086 +/- 0.0009 for crystallation 18 Ma after Allende, using the Mn-Cr formation interval. The isotopic data are discussed in the context of a model in which an undifferentiated 'chondritic' parent body formed from the solar nebula approximately Ma after Allende CAIs and subsequently underwent differentiation accompanied by loss of volatiles. Parent bodies with Rb/Sr similar to that of CI, CM, or CO chondrites could satisfy the Cr and Sr isotopic systematics. If the angrite parent body had Rb/Sr similar to that of CV meteorites, it would have to form slightly later, approximately 2.6 Ma after the CAIs, to satisfy the Sr and CR isotopic systematics.

  13. Análise cinemática bi-dimensional dos núcleos de NGC 4051 e NGC 4941

    NASA Astrophysics Data System (ADS)

    Barbosa, F. K. B.; Storchi-Bermagnn, T.; Schmitt, H. R.; Cid Fernandes, R.; Winge, C.

    2003-08-01

    Estudos recentes da cinemática da região dentro de 1 kpc do núcleo de galaxias Seyfert próximas usando espectroscopia de fenda longa com alta resolução espacial (~ 100 pc ou melhores) encontraram uma queda na dispersão de velocidades nas regiões centrais dentro de um raio de ~ 300 pc do núcleo. Essa queda vem sendo tentativamente explicada por um cenário evolutivo em que um evento de formação estelar recente cria as estrelas da região central em um disco de dimensões 300 pc. Desde sua criação, tais estrelas não tiveram tempo de "virializar", ou seja, seguir a distribuição radial de dispersões de velocidades determinada pelo campo gavitacional da galáxia e, portanto, a dispersão de velocidades medida nessa região do bojo acaba sendo menor do que a dispersão medida nas vizinhanças. No presente trabalho investigamos a cinemática estelar no núcleo das galáxias Seyfert NGC 4051 e NGC 4941 usando o tripleto do Ca ii (8500 Å) em absorção. Os dados foram obtidos com o IFU GMOS no telescópio Gemini. O elemento de resolução espacial nas galáxias é da ordem de 30 pc. No intervalo espectral coberto pelo espectrografo a linha [S iii] (9068 Å) também é visível, o que permite estudar a cinemática do gás na mesma região. Serão apresentados mapas bi-dimensionais da velocidade e dispersão de velocidades das estrelas e do gás, além de imagens na linha [S iii] que mapeia o gás de alta excitação.

  14. El Proyecto Cunningham: Dos Idiomas; Muchos Paises, 1995-96 (The Cunningham Project: Two Languages, Many Countries, 1995-96). Research Report on Educational Grants.

    ERIC Educational Resources Information Center

    Houston Independent School District, TX. Dept. of Research and Evaluation.

    This report presents an evaluation of a two-way bilingual program in English and Spanish at the Cunningham Elementary School (Texas). The program was designed to extend and expand educational reform by shifting the instructional program at the school over the 5-year time span from a transitional bilingual program to a two-way bilingual, or dual

  15. A Educacao dos Portadores de Necessidades Especiais no Brasil no Periodo de 1910 a 1949 (Education of Those with Special Needs in Brazil from 1920 to 1949).

    ERIC Educational Resources Information Center

    Marques, Carlos Alberto; Santiago, Mylene Cristina; de Moura, Simone Moreira

    2000-01-01

    Examines education given to those with special needs in Brazil from 1910-1949. Shows the dichotomy of meanings in which the education of special needs persons during that period, besides being marked by concepts related to the exclusion paradigm, already indicated signs of respect for diversity and civil rights. (BT)

  16. Observaes simultneas no ptico e infravermelho prximo dos BL Lacs PKS 2005-489 e PKS 2155-304 em diversas escalas de tempo

    NASA Astrophysics Data System (ADS)

    Dominici, T. P.; Abraham, Z.; Galo, A. L.

    2003-08-01

    A existncia de variaes rpidas de brilho em alguns blazares um fenmeno bem comprovado, mas at agora no sabemos ao certo quais so os mecanismos fsicos envolvidos. A maior dificuldade a ausncia de observaes multibanda simultneas que poderiam fornecer vnculos aos modelos. Buscando colaborar com a discusso estudamos o comportamento de dois BL Lacs, PKS 2005-489 e PKS 2155-304, em relao variabilidade em diversas escalas de tempo, de poucos minutos at vrios meses, com observaes simultneas em seis bandas espectrais (ptico e infravermelho prximo). Para tanto dois telescpios do LNA foram utilizados em conjunto nas campanhas observacionais realizadas em 2001 e 2002, cujos resultados so apresentados aqui. As duas fontes apresentaram caractersticas bastante diferentes, inclusive em relao existncia de variabilidade nos ndices espectrais. Particularmente, registramos a primeira deteco de variaes em escalas de tempo da ordem de poucos minutos em PKS 2005-489, com evidncias da presena de um atraso entre as curvas de luz nas bandas V e R e a variao em R ocorrendo antes (o contrrio do esperado no modelo de shock-in-jet). Em PKS 2155-304 detectamos pela primeira vez variabilidade em escalas de tempo de poucos minutos no infravermelho em um AGN. As observaes indicam que as variaes de brilho em blazares so o resultado da ao de mais de um fenmeno, especialmente em escalas de tempo muito curtas. Alguns cenrios fsicos so sugeridos para explicar os resultados observacionais.

  17. Small rodents fleas from the bubonic plague focus located in the Serra dos Orgos Mountain Range, State of Rio de Janeiro, Brazil.

    PubMed

    de Carvalho, R W; Serra-Freire, N M; Linardi, P M; de Almeida, A B; da Costa, J N

    2001-07-01

    Eleven species of fleas were collected from 601 small rodents, from November 1995 to October 1997, in areas of natural focus of bubonic plague, including the municipalities of Nova Friburgo, Sumidouro and Terespolis, State of Rio de Janeiro, Brazil. Among 924 fleas collected, Polygenis (Polygenis) rimatus (Rhopalopsyllidae) was the predominant species regarding the frequency, representing 41.3% (N:382), followed by P. (Neopolygenis) pradoi, representing 20% (N:185) and Craneopsylla minerva minerva (Stephanocircidae), representing 18.9% (N:175). The host Akodon cursor harbored 47.9% of these fleas. Other six host species were infested by 52.1% of the remaining fleas. Fleas were found on hosts and in places within the focus not previously reported by the literature. PMID:11500756

  18. Yo Ciudadano: Un Curriculo de Experiencias para Educacion Civica. Nivel: Dos (Citizen Me: An Experiential Curriculum for Citizenship Education. Level: Two).

    ERIC Educational Resources Information Center

    Lantz, Jean

    Integrating concepts of basic citizenship education with community involvement, this experiential curriculum provides a means for developing decision making and critical thinking skills within the existing second grade social studies curriculum. The 10 lessons, translated into Spanish, cover the following concepts: friendly, unfriendly and

  19. Clinical Awareness of Dos and Donts of Cardiopulmonary Resuscitation (CPR) Among University Medical Students-A Questionnaire Study

    PubMed Central

    Amberkar, Mohan babu; Alur S, Suhas; Bhat, Pavan Madhukar; Bansal, Siddharth

    2014-01-01

    Background: Medical students today are tomorrows future doctors. One of the key skills that students should develop during their graduation training is to be prepared for emergency life saving measures like cardiopulmonary resuscitation (CPR) anytime, anywhere. The students play integral role in learning, mastering and inculcating the most pragmatic clinical skill of CPR. Objectives: a) To evaluate the CPR awareness among undergraduate medical students. b) To screen the knowledge regarding accurate, effective CPR procedural techniques and various barriers of CPR failure in clinical practice from student perspective. c) To ascertain interest in CPR training programs and also inculcating CPR as an active part of clinical practice in future. Materials and Methods: The questionnaire comprised of three parts, first one dealing with general questions to know the importance of CPR in clinical practice, second one comprised of the main goal and accuracy of CPR intervention and the last segment consisted of questions targeting the indications, methods and effectiveness of CPR. Statistical Analysis: Descriptive statistics and multiple response analyses were done by using SPSS 17. Results: The students had good knowledge about the importance of CPR in clinical practice and stand average in knowing its indications and effectiveness. Whereas, only 1.2% of them were completely aware about the universal compression ventilation ratio, and 20.4% were aware of the current order of CPR being compression, airway and breathing. Conclusion: Though, CPR awareness is good among the students but skills of CPR have to be mastered by proper certified training programs at regular intervals and knowledge has to be updated with the changing trends in CPR. PMID:25177588

  20. Yo Ciudadano: Un Curriculo de Experiencias para Educacion Civica. Nivel: Dos (Citizen Me: An Experiential Curriculum for Citizenship Education. Level: Two).

    ERIC Educational Resources Information Center

    Lantz, Jean

    Integrating concepts of basic citizenship education with community involvement, this experiential curriculum provides a means for developing decision making and critical thinking skills within the existing second grade social studies curriculum. The 10 lessons, translated into Spanish, cover the following concepts: friendly, unfriendly and…

  1. Dos Idiomas, Un Mundo Dual Language Project Title VII Third-Year Evaluation Report, 1997-98. Publication Number 97.21.

    ERIC Educational Resources Information Center

    Liberty, Paul; Gonzalez, Rosa Maria

    An evaluation was conducted of the third year of a 5-year comprehensive bilingual education grant funded by Title VII of the Improving America's Schools Act of 1994. The grant funds a program of developmental bilingual education at two elementary schools in the Austin Independent School District (Texas). More than 25% of the students at each

  2. Sanchez and Metz Elementary Schools: Dos Idiomas, Un Mundo. Dual Language Project. Title VII First-Year Evaluation Report, 1995-96.

    ERIC Educational Resources Information Center

    Ernest, Harishini M.; Gonzalez, Rosa Maria

    The first-year evaluation of a two-way Spanish/English bilingual education program at two Austin (Texas) elementary schools is presented. The developmental program has as its objectives the development of students' oral proficiency in Spanish and English, development of grade-level appropriate literacy in both languages, increase in academic

  3. [Oral cleft and its notification in the information system: live Births Declaration analysis in Campos dos Goytacazes, Rio de Janeiro State, 1999-2004].

    PubMed

    Nunes, Luiz Maurcio Nogueira; Pereira, Antonio Carlos; Queluz, Dagmar de Paula

    2010-03-01

    The objective of this study was to verify the notification of information system for oral clefts in the live births declaration (DNV), studying the 3 items of DNV related to malformation. All the patients' medical records registered in oral cleft reference centers were checked. The inclusion criteria were: a) to have any oral cleft and b) to be born from 01/01/1999 to 12/31/2004. Next step was to raise the information in the vital data sector of Municipal Health Secretary, where all the DNVs identified were subjects with oral clefts (63 children). The first item presented a large subnotification (only 53.3 of the DNVs showed the register of malformation) and all types of clefts were not notified in any scale. Highest sub notification was observed for cleft palate (70%). Second item (description of malformation) showed similarly a high number of errors referred to palate cleft, identified only in 25% of the cases. All the documents showed no information about the third item (code of malformation). There was no statistical difference between professionals responsible for filling out the document. In conclusion, the DNV was inefficient to register the oral cleft cases due to imperfections related to 3 items studied, especially in the absence of information about CID-10 codes. PMID:20414600

  4. Plug in to the Utah Library Network, Reach Out to the World. Utah Library Network and Internet Training Handbook [for DOS]. Information Forum Publication #7.

    ERIC Educational Resources Information Center

    Reinwand, Louis; And Others

    This manual is designed to assist public libraries in Utah in their use of the Internet. Many of the examples used were created specifically to explain the use of products that the Utah Library Network provides for public libraries in Utah. The introduction provides background history and general information about the Internet and general…

  5. Análise da aplicação e dos resultados do modelo OPM3® para a área da saúde

    PubMed Central

    Augusto dos Santos, Luis; de Fátima Marin, Heimar

    2015-01-01

    Esta pesquisa procurou analisar se um modelo de questionário criado por uma comunidade internacional de gerenciamento de projetos e se é aplicavél a organizações voltadas a área de saúde. O modelo OPM3® (Organizational Project Management Maturity Model) foi criado para que organizações de qualquer área ou porte pudessem identificar a presença, ou ausência, de boas práticas de gerenciamento. O objetivo da aplicação desse modelo é avaliar sempre a organização e não o entrevistado. No presente artigo, são apresentados os resultados da aplicação desse modelo em uma organização que possuía produtos e serviços de tecnologia da informação aplicados à área de saúde. Este estudo verificou que o modelo é aplicável de forma rápida e que a organização analisada possuía um número expressivo de boas práticas. PMID:26924862

  6. La investigacion sobre la calidad de los programas para ninos de hasta dos anos de edad (Research on Quality in Infant-Toddler Programs). ERIC Digest.

    ERIC Educational Resources Information Center

    Honig, Alice Sterling

    Concern about the quality of infant-toddler care programs has grown recently in response to two factors. The first is the need of employed parents for such care, and the second is research emphasizing the importance of brain development in the early years. This Spanish-language Digest introduces some of the many issues related to the quality of…

  7. Geochronology and Nd isotope geochemistry of the Gameleira Cu-Au deposit, Serra dos Carajs, Brazil: 1.8-1.7 Ga hydrothermal alteration and mineralization

    NASA Astrophysics Data System (ADS)

    Pimentel, Mrcio M.; Lindenmayer, Zara G.; Laux, Jorge H.; Armstrong, Richard; de Arajo, Janice Caldas

    2003-01-01

    The Gameleira deposit is one of several important Cu-Au deposits associated with the late Archean (ca. 2.7 Ga) volcanic rocks of the Itacainas supergroup in the Carajs mineral province, southeastern Par. It comprises mainly biotite- and sulphide-rich veins and quartz-grunerite-biotite-gold hydrothermal veins that cut andesitic rocks. It is interpreted as representative of the Fe oxide Cu-Au class of deposit. Sm-Nd isotopic data indicate an age of 271980 Ma (MSWD=3.0) and ?Nd( T) of -1.4 for the host meta-andesites. Metavolcanic rocks and cogenetic gabbros give an age of 275781 Ma (1 ?) with ?Nd( T) of -0.8. This is considered the best estimate for the crystallization age of the Gameleira volcanic and subvolcanic rocks. Negative ?Nd( T) and Archean TDM model ages (mostly between 2.8 and 3.1 Ga) suggest some contamination with older crustal material. The andesitic/gabbroic rocks are cut by two generations of granite dykes. The older has striking petrographic and geochemical similarities to the ca. 1.87 Ga alkali-rich Pojuca granite, which is exposed a few kilometers to the northwest of the deposit. The younger is a leucogranite with a U-Pb SHRIMP age of 1583+9/-7 Ma. Neodymium isotopic analyses of the two generations of granites indicate a strong crustal affinity and possible derivation from reworking of the Archean crust. The quartz-grunerite-gold hydrothermal vein yields a Sm-Nd isochron (MSWD=.83) age of 183915 Ma (1 ?) with ?Nd( T) of -9.2. Pervasive potassic alteration, represented by the widespread formation of biotite in the country rocks, is dated by Ar-Ar at 17348 Ma, and a similar age of 170031 Ma (1 ?) is indicated by the Sm-Nd isochron for the biotite-sulphide veins. Similar to that for the quartz-grunerite vein, the ?Nd( T) value for the sulphide-rich veins is strongly negative (-8.2), thereby suggesting that the original fluids percolated through, leached, or were derived from igneous rocks with an Archaean Nd isotopic signature. The geochronological data suggest that the Gameleira Cu-Au mineralization is related to a Paleoproterozoic (ca. 1.83 Ga) episode of hydrothermal activity and is not Archaean. The younger ages of ca. 1.70-1.73 might be interpreted as products of the lower blocking temperatures of biotite in relation to the Ar-Ar and Sm-Nd isotopic systems. Combined with previous geochemistry and stable isotope data, the Nd isotopic data suggest that the mineralizing fluids were derived from, or strongly interacted with, a Paleoproterozoic crustal granite, possibly similar in age and composition to the Pojuca granite.

  8. Adenoviruses of canine and human origins in stool samples from free-living pampas foxes (Lycalopex gymnocercus) and crab-eating foxes (Cerdocyon thous) in São Francisco de Paula, Rio dos Sinos basin.

    PubMed

    Monteiro, G S; Fleck, J D; Kluge, M; Rech, N K; Soliman, M C; Staggemeier, R; Rodrigues, M T; Barros, M P; Heinzelmann, L S; Spilki, F R

    2015-05-01

    The spread of enteric viruses of domestic animals and human beings to wild species can be facilitated by the resistance of these viruses on the environment and their ability to be transmitted by water and contaminated food. The health status of the populations of pampas foxes Lycalopex gymnocercus) and crab-eating foxes (Cerdocyon thous) is largely unknown and the landscapes occupied by these animals in southern Brazil have been threatened by human occupation and expansion of agriculture. In this work, the search of genomes of human and canine adenoviruses in feces from these wild carnivores was used to track the dissemination of domestic animals and human pathogens to the free-living populations in a wildlife reserve located in southern Brazil. This was performed by virus-specific differential real-time polymerase chain reactions (qPCR) on stool specimens, avoiding capture and additional stress to the animals. Genus-specific conventional reverse-transcriptase PCR (RT-PCR) was complementarily performed aiming the detection of enteroviruses (EV) and rotaviruses (RV) on these same samples. HAdV genomes were found on 14 out of the 17 (82.35%) stool samples analysed, whereas CAV was found co-infecting 5 of these samples. RV genomes were detected on 7 of the 17 samples (41.18%) and all samples were negative for EV. The results point to the dispersion of HAdV and RV at a high rate to these species of South American wild carnivores, which can be an effect of growing anthropisation of the habitat of these animals. PMID:26270208

  9. DIMED 86: Discurso dos Media e Ensino a Distancia = Discours des Media et Enseignement a Distance = Media Speech and Distance Teaching. Papers Presented at a Seminar (21st, Algarve, Portugal, March 10-15, 1986).

    ERIC Educational Resources Information Center

    Coelho, Maria Eduarda Leal

    Presentations at this seminar on distance education focused on the different types of speech in multimedia presentations which contribute to the elaboration (simulated or substituted) of a situation involving different relationships. In addition to opening and closing remarks by Marcel de Greve and a final report by the Scientific Committee of…

  10. DIMED 86: Discurso dos Media e Ensino a Distancia = Discours des Media et Enseignement a Distance = Media Speech and Distance Teaching. Papers Presented at a Seminar (21st, Algarve, Portugal, March 10-15, 1986).

    ERIC Educational Resources Information Center

    Coelho, Maria Eduarda Leal

    Presentations at this seminar on distance education focused on the different types of speech in multimedia presentations which contribute to the elaboration (simulated or substituted) of a situation involving different relationships. In addition to opening and closing remarks by Marcel de Greve and a final report by the Scientific Committee of

  11. [Desmoplastic ameloblastoma in a 7 year old child].

    PubMed

    Mikou, A; Al Bouzidi, A; Kabbaj, R; Chahdi, H; Kamous, W; Zoubeir, Y; Rharrassi, I; Rimani, M; Labraimi, A; El Khatib, M; Rzin, A; Nassih, M

    2008-01-01

    Desmoplastic ameloblastoma is a benign, locally aggressive neoplasm of proliferating odontogenic epithelial origin. It is seen among old patients from 17 to 72 years with an average age 42 years and without predilection of sex. We report the case of a 7 year old child, having presented since the 5 years age, a gingival tumefaction on the left higher incisivo-canin group which increased volume gradually. The stomatologic examination showed a gingival tumefaction covered with a healthy mucous membrane, ovoid form and measuring 3 cm on its horizontal axis. The tomodensitometry of the jawbone showed in front of the 21st and the 22nd tooth, the presence of an osseous lesion associating of the hearths of osteolysis and osteocondensation with rupture of cortical and invasion of the soft tissue. A curetting of the lesion was carried out and the anatomopathologic examination retained the diagnosis of desmoplastic ameloblastoma. The characteristic of our observation is the youth of the patient. In addition, the desmoplastic ameloblastoma is relatively rare, is characterized by an anatomical distribution, a radiological appearance and a morphological aspect differents from the traditional ameloblastoma. A radical surgical treatment is suggested for this tumour to avoid recurrency. PMID:19408524

  12. Sedimentation in the coastal reefs of Abrolhos over the last decades

    NASA Astrophysics Data System (ADS)

    Silva, A. S.; Leo, Z. M. A. N.; Kikuchi, R. K. P.; Costa, A. B.; Souza, J. R. B.

    2013-11-01

    Coral reefs of the coastal area of Abrolhos are located in an environment with a high influx of terrigenous sediments that are carried out to the sea, either as a result of natural processes (river output, coastal erosion, and torrents) or due to anthropogenic influences (deforestation, coastal development, and dredging). Excessive terrigenous sediment in coastal areas has been identified as one of the major threats to coral reefs, leading to their worldwide decline. The present study assessed the evolution of sedimentation in the Abrolhos coastal reefs during the past decades by analyzing samples from sediment cores collected near the reefs of Coroa Vermelha (located 15 km from the coast), Pedra de Leste (located 12 km from the coast) and Popa Verde (located 35 km from the coast). The purpose of this assessment was to observe whether the previously described pattern of surficial bottom sediment distribution in Abrolhos, which consisted of terrigenous mud in the nearshore reefs, to carbonate-dominant sediments towards the offshore reefs, is still a prevalent feature. Sediment color, texture, CaCO3 percentage, biogenic compounds and clay minerals, as well as the sedimentation rate and the geochronology of the sediment cores were analyzed. The results showed indications of an increase in the deposition of terrigenous mud, over the last decade, in the vicinity of the reefs nearest to the coast, though this does not yet constitute a definitive evidence of such a change. However, this observation therefore suggests that local processes resulting from anthropogenic actions are most likely causing an increase of the sedimentation rate of continent-derived sediment runoff in the Abrolhos coastal areas. To minimize this situation, there is an urgent need for the development of new management strategies to protect the already disturbed Abrolhos coastal reefs, especially during times of global changes.

  13. Energy from renewable sources for rural communities of the state of Rio Grande Do Sul, Brazil

    SciTech Connect

    Bristotti, A.; Sadhu, D.

    1983-12-01

    Rural communities of the state of Rio Grande do Sul developed on the basis of various ethenic origin, and distinctly took root in the regions of different topography. On the south and the west nearly half of the state is mainly flat land, where the inhabitants are racially heterogenous and live pricipally in small towns with large farm lands around. The rest of the state consists of high lands that gradually rise from the northwest to maximum 1200m altitude at the northeast. In the foothills, industrial base was developed by the German settelers, whereas the Italian immigrants settled on the hills. The hilly region is composed of small rural properties with area varying from 10 to 50 hectares. They are scattered all over the region, which make it economically unfeasable to distribute electricity from the main grid, due to high investment cost unlikely to be paid off by the energy consumption rate of the rural properietors. It could be verified from the fact that till to-date the local federation of the cooperatives of rural electrification achieved to supply electricity to only 15% of the total area and its future expansion is getting limited. This paper describes a pilot project initiated in the county 'Tres Coroa' of this region, that is being developed under the guidance of the energy group of the Federal University of RGS, coordinated with balanced technical, agronomical, economical and ecilogical activities to meet its energy demand, that could be supplied with the locally available resources. It is aimed in this project to provide the rural habitants adequate energy for a decent living i.e., electricity for lights, TV and small domestic appliances, thermal energy for hot water supply and fuel to run the agricultural machineries. In future, other nearby counties could follow this experiment with proper and adequate modifications to suite the need and the type of resources available there.

  14. Communicacion Expresiva: Como los ninos nos envian mensajes [and] Comunicacion Receptiva: Como los ninos entienden nuestros mensajes [and] Interacciones de Comunicacion: Hacen falta dos. Hojas informativa de DB-LINK (Communication Interactions: It Takes Two [and] Receptive Communication: How Children Understand Your Messages to Them [and] Expressive Communication: How Children Send Their Messages to You. DB-LINK Fact Sheets).

    ERIC Educational Resources Information Center

    Stremel, Kathleen

    This document consists of three separately published fact sheets combined here because of the close relationship of their subject matter. The first fact sheet, "Communication Interactions: It Takes Two" (Kathleen Stremel), defines communication; suggests ways to find opportunities for interactive communication; offers specific suggestions for

  15. O Passado como Nacao: Imagens do Imperio nas Falas Reacionarias dos Anos 30 e 40 do Seculo XX: Uma Pequena Arqueologia do Debate Publico e Privado (The Past as Nation: Images of the Empire in the Reactionary Words of the 30s and 40s in the 20th Century: A Small Archaeology of the Public Debate versus the Private One).

    ERIC Educational Resources Information Center

    de Freitas, Marcos Cezar

    1998-01-01

    Suggests an archaeology of the public debate versus the private one in Brazil through analysis of the reactionary speech of a religious leader, Dom Jose Mauricio da Rocha, which produced innumerable representations of the Brazilian Empire. (PA)

  16. LETTERS TO THE EDITORS: Lightning ball: experiments on creation and hypotheses(comment on "Energy density calculations for ball-lightning-like luminous silicon balls" by G S Paiva, J V Ferreira, C C Bastos, M V P dos Santos, A C Pavão)

    NASA Astrophysics Data System (ADS)

    Shabanov, Gennadii D.

    2010-05-01

    The problems addressed in this paper include estimating: the energy density of luminous silicon balls, the density range of a natural lightning ball, and whether and how the object created and described in the commented paper (Usp. Fiz. Nauk 180 218 (2010) [Phys. Usp. 53 (2) 209 (2010)]) corresponds to the natural phenomenon.

  17. Reading: Students' Attitudes and Interests in Fourth, Fifth, and Sixth Grades in Official Portuguese Schools in the USA (A Leitura: Atitudes e Preferencias dos Educandos do 4th, 5th, e 6th Anos de Escolaridade nas Escolas Oficiais Portuguesas nos Estados Unidos da America).

    ERIC Educational Resources Information Center

    Castanho, Maria da Graca Borges

    A study investigated attitudes and preferences concerning reading among fourth-, fifth-, and sixth-grade students in Portuguese-language schools in the United States. Extrinsic factors influencing students (parents, teachers) were also analyzed. The research took place in 10 schools in 5 states. Data were obtained using questionnaires (students)

  18. Lo que Piensan los Estudiantes y Profesores Sobre la Calidad de la Educacion Superior. Estudio Comparativo en 5 Instituciones de Educacion Superior--dos publicas y tres privadas--en Guadalajara, Jalisco, Mexico (What Students and Faculties Think about the Quality of Higher Education. Comparative Study of 5 Higher Education Institutions--Two Public and Three Private--in Guadalajara, Jalisco, Mexico).

    ERIC Educational Resources Information Center

    Yanez, Maria Lorena Hernandez

    This study, written in Spanish, compared attitudes of students (N=302) and faculty (N=28) at five institutions of higher education (two public and three private) in Guadalajara, Jalisco, Mexico. The study explored first, whether respondents believed there are significant quality differences between private and public universities and, second, what…

  19. 28 CFR 51.20 - Form of submissions.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... megabyte MS-DOS formatted diskettes; 5 1/4? 1.2 megabyte MS-DOS formatted floppy disks; nine-track tape...-track tapes shall be clearly marked with printed labels to indicate their density, and manner...

  20. Whenever You Use a Computer You Are Using a Program Called an Operating System.

    ERIC Educational Resources Information Center

    Cook, Rick

    1984-01-01

    Examines design, features, and shortcomings of eight disk-based operating systems designed for general use that are popular or most likely to affect the future of microcomputing. Included are the CP/M family, MS-DOS, Apple DOS/ProDOS, Unix, Pick, the p-System, TRSDOS, and Macintosh/Lisa. (MBR)

  1. Effect of mouse cumulus cells on the in vitro maturation and developmental potential of bovine denuded germinal vesicle oocytes.

    PubMed

    Zhao, Xue-Ming; Ren, Jing-Jing; Du, Wei-Hua; Hao, Hai-Sheng; Liu, Yan; Qin, Tong; Wang, Dong; Zhu, Hua-Bin

    2014-08-01

    We investigated the effect mouse cumulus cells (mCCs) on the in vitro maturation (IVM) and developmental potential of bovine denuded germinal vesicle oocytes (DOs). Cumulus-oocyte complexes (COCs), DOs and DOs cocultured with either mCCs (DOs + mCCs) or bovine cumulus cells (bCCs; DOs + bCCs) were subjected to IVM. The meiosis II (MII) rates of DOs, glutathione (GSH) contents, zona pellucida (ZP) hardening and parthenogenetic blastocyst rates of MII oocytes were determined. The relative expression levels of bone morphogenetic protein 15 (BMP-15) and growth differentiation factor 9 (GDF-9) in MII oocytes were measured using quantitative real-time polymerase chain reaction (PCR). mCCs significantly increased the MII rate of DOs from 53.5 3.58% to 69.67 4.72% (p < 0.05) but had no effect on the GSH content (2.17 0.31 pmol/oocyte with mCCs, 2.14 0.53 pmol/oocyte without mCCs). For the DOs + mCCs group, the BMP-15 and GDF-9 expression levels were significantly higher and the ZP dissolution time was significantly lower (162.49 12.51 s) than that of the DOs group (213.95 18.87 s; p < 0.05). The blastocyst rate of the DOs + mCCs group (32.56 4.94%) was similar to that of the DOs group (31.75 3.65%) but was significantly lower than that of the COCs group (43.52 5.37%; p < 0.05). In conclusion, mCCs increased the MII rate of DOs and expression of certain genes in MII oocytes, and decreased the ZP hardening of MII oocytes, but could not improve their GSH content or developmental potential. PMID:23369698

  2. If Your Child Learns in Two Languages: A Parent's Guide for Improving Educational Opportunities for Children Acquiring English as a Second Language = Si su nino aprende en dos idiomes: Una guia para que las familias sepan como mejorar las oportunidades educativas de los ninos que adquieren el ingles como segunda lengua = Neu lon Ban Hoc Bang Hai Thu Tieng: Chi-nam cua phu-huynh de cai tien co hoi hoc van cua con em dang hoc Anh van nhu sinh ngu thu hai.

    ERIC Educational Resources Information Center

    Zelasko, Nancy; Antunez, Beth

    This guide, in English, Spanish, and Vietnamese, aims to inform parents of students who have learned or are learning English as a Second Language about appropriate approaches for educating children so that they can work with schools to ensure a high quality education for their children. The emphasis is on explaining the laws, schools, and research

  3. Effect of structure on the electronic density of states of doped lanthanum cuprate

    SciTech Connect

    Norman, M.R. ); McMullan, G.J. ); Novikov, D.L.; Freeman, A.J. )

    1993-10-01

    We present a series of detailed band calculations on the various structural phases of doped lanthanum cuprate: HTT, LTO, and LTT. The LTO distortion is shown to have little effect on the electronic density of states (DOS). A fit to the pressure dependence of the superconducting transition temperature indicates that only 2.5% of the DOS is affected by the HTT[r arrow]LTO transition. The LTT distortion also has little effect on the DOS for the experimental value of the octahedral tilt angle. Larger tilt angles, though, lead to a dramatic change in the DOS.

  4. Effect of structure on the electronic density of states of doped lanthanum cuprate

    NASA Astrophysics Data System (ADS)

    Norman, M. R.; McMullan, G. J.; Novikov, D. L.; Freeman, A. J.

    1993-10-01

    We present a series of detailed band calculations on the various structural phases of doped lanthanum cuprate: HTT, LTO, and LTT. The LTO distortion is shown to have little effect on the electronic density of states (DOS). A fit to the pressure dependence of the superconducting transition temperature indicates that only 2.5% of the DOS is affected by the HTT-->LTO transition. The LTT distortion also has little effect on the DOS for the experimental value of the octahedral tilt angle. Larger tilt angles, though, lead to a dramatic change in the DOS.

  5. Contribution of acoustic modes to the density of vibrational states measured by inelastic scattering techniques

    SciTech Connect

    Chumakov, A. I.; Bosak, A.; Rueffer, R.

    2009-09-01

    We consider the contribution of acoustic modes to the density of vibrational states measured by nuclear inelastic, inelastic x-ray, and inelastic neutron scattering. In nuclear and x-ray scattering, the low-energy part of the density of states (DOS) is compared with the contribution of acoustic modes to the generalized density of states. Different to that, in neutron scattering the DOS is compared with the contribution of acoustic modes to the true density of states. We argue that in general this is not correct and that similar to nuclear and x-ray scattering, the neutron data in most cases must also be compared with the contribution of acoustic modes to the generalized DOS. For neutron scattering, this contribution usually is smaller than the contribution to the true DOS. Thus, the comparison of the neutron data with the contribution of acoustic modes to the true DOS systematically overestimates the level of acoustic modes. However, an extrapolation of the neutron DOS to zero energy often exceeds even this overestimated level. In our eyes, even for glasses the manifold excess of the extrapolation of the neutron DOS to zero energy over the expected level of acoustic modes seems to be unreasonable even though in this case one can still argue on existing of additional soft modes. However, a similar excess observed also for crystalline samples clearly indicates an uncertainty of the absolute scale of the DOS measured by neutron scattering.

  6. MLJ Computer Corner.

    ERIC Educational Resources Information Center

    Brink, Dan

    1986-01-01

    A general technique for customizing computer printers (with the MS-DOS or PC-DOS software) to the special needs of foreign language professionals is described, and examples are presented. This "detour" technique can be used to turn the printer into a typewriter and send character sequences to the printer. (CB)

  7. 75 FR 52581 - Notice of Meeting and Closed Meeting of the Cultural Property Advisory Committee

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-08-26

    ... Notice 7105; Greece Docket No. DOS-2010-0339; Colombia Docket No. DOS-2010-0340] Notice of Meeting and... Republic of Colombia Concerning the Imposition of Import Restrictions on Archaeological Material from the Pre-Columbian Cultures and Certain Ethnological Material from the Colonial Period of Colombia...

  8. 77 FR 74628 - Airworthiness Directives; Embraer S.A. Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-17

    ... rule'' under the DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); 3. Will not... Lima, 2170--Putim--12227-901 S o Jose dos Campos--SP-- BRASIL; telephone +55 12 3927-5852 or +55 12.... Brigadeiro Faria Lima, 2170--Putim--12227-901 S o Jose dos Campos--SP--BRASIL; telephone +55 12 3927-5852...

  9. 76 FR 5298 - Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-500 Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-01-31

    ... 12866; 2. Is not a ``significant rule'' under the DOT Regulatory Policies and Procedures (44 FR 11034... Support, Av. Brig. Farina Lima, 2170, Sao Jose dos Campos-- SP, CEP: 12227-901--PO Box: 36/2, BRASIL.... Farina Lima, 2170, Sao Jose dos Campos-SP, CEP: 12227-901--PO Box: 36/2, BRASIL; telephone: ++55 12...

  10. Paracrine factors from cumulus-enclosed oocytes ensure the successful maturation and fertilization in vitro of denuded oocytes in the cat model

    PubMed Central

    Godard, Natasha M.; Pukazhenthi, Budhan S.; Wildt, David E.; Comizzoli, Pierre

    2009-01-01

    Objective To better characterize the cumulus-oocyte interactions during oocyte maturation and fertilization using the cat model. Design Experimental in vitro study. Setting Smithsonian Institution. Animal(s) Domestic Shorthair cats. Intervention(s) Groups of denuded oocytes (DOs) and cumulus-oocyte complexes (COCs) were subjected to in vitro maturation (IVM; with or without FSH/LH, with or without the gap junction disruptor 1-heptanol, in separated groups or in co-culture) and inseminated in vitro (IVF; in separated groups or in co-culture). Main Outcome Measure(s) Nuclear maturation, pronuclear formation, kinetics of early embryo cleavage, and blastocyst formation/quality after different in vitro conditions were compared between DOs cultured separately and DOs co-cultured with COCs. Result(s) Without FSH/LH, the removal of cumulus cells prevented spontaneous meiotic resumption in DOs. With FSH/LH, groups of DOs progressed to the metaphase I stage, but fully advanced to metaphase II only in co-culture with intact (non-disrupted) COCs. Groups of DOs cultured separately were poorly fertilized and exhibited no blastocyst formation. In contrast, DOs co-cultured with intact COCs during IVM and IVF recovered fertilizability and ~ 35% formed blastocysts. Conclusion(s) Paracrine factors produced by cumulus-enclosed oocytes in the cat model will help to develop synthetic media for successful in vitro culture of DOs. PMID:18692794

  11. Measuring Student Learning in Social Justice Courses: The Diversity and Oppression Scale

    ERIC Educational Resources Information Center

    Windsor, Liliane Cambraia; Shorkey, Clay; Battle, DuWayne

    2015-01-01

    The Diversity and Oppression Scale (DOS) is a standardized instrument measuring self-reported student learning about diversity and oppression based on requirements of the Council on Social Work Education. DOS was tested with social work students in 2 major North American universities. Factor structure was examined using exploratory factor analysis…

  12. Clearing a Path: The 16-Bit Operating System Jungle Offers Confusion, Not Standardization.

    ERIC Educational Resources Information Center

    Pournelle, Jerry

    1984-01-01

    Discusses the design and limited uses of the Pascal, MS-DOS, CP/M, and PC-DOS operating systems as standard operating systems for 16-bit microprocessors, especially with the more sophisticated microcomputers currently being developed. Advantages and disadvantages of Unix--a multitasking, multiuser operating system--as a standard operating system

  13. Yours, Mine or Ours: What Counts as Innovation?

    ERIC Educational Resources Information Center

    Cooksey, Ray W.

    2011-01-01

    In this paper, I argue that research and development organizations (R&DOs) have particular perspectives on what counts as an innovation whereas the potential adopting users usually have quite different often diverse perspectives. If these "worldviews" do not overlap or speak to each other, then what R&DOs consider innovative might constitute a

  14. RESPSYST: An Interactive Microcomputer Program for Education.

    ERIC Educational Resources Information Center

    Boyle, Joseph

    1985-01-01

    RESPSYST is a computer program (written in BASICA and using MS-DOS/PC-DOS microcomputers) incorporating more than 20 of the factors that determine gas transport by the cardio-respiratory system. The five-part program discusses most of these factors, provides several question/answer sections, and relies heavily on graphics to demonstrate…

  15. 27 CFR 9.187 - Covelo.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... this chapter, Covelo is a term of viticultural significance. (b) Approved Maps. The appropriate maps... Survey 1:24,000 scale topographic maps. They are titled: (1) Dos Rios, California Quadrangle,Mendocino...'s boundaries are defined as follows (1) Beginning on the Dos Rios map at the intersection of...

  16. Asunción Garden

    USGS Multimedia Gallery

    Colonial style courtyard in Asunción with various ornamentals, including exotic species. Se ven dos ejemplares de Palmera Imperial (especie exótica), una la que está en primer plano, con una orquídea Cattleya sp., dos Cocoteros o Mbocayá (Acrocomia totai). La ...

  17. Choosing the Right Database Management Program.

    ERIC Educational Resources Information Center

    Vockell, Edward L.; Kopenec, Donald

    1989-01-01

    Provides a comparison of four database management programs commonly used in schools: AppleWorks, the DOS 3.3 and ProDOS versions of PFS, and MECC's Data Handler. Topics discussed include information storage, spelling checkers, editing functions, search strategies, graphs, printout formats, library applications, and HyperCard. (LRW)

  18. A Guide to Selecting Large Print/Enhanced Image Computer Access Hardware/Software for Persons with Low Vision.

    ERIC Educational Resources Information Center

    DeWitt, J. C.; And Others

    1988-01-01

    Large print/enhanced image computer access products for low-vision individuals are reviewed. The products ("DP-11/Plus,""Large Print DOS,""Lyon Large Print,""PC Lens,""Vista/Vista 2," and "ZoomText") work interactively with most application programs and DOS in IBM environments. Features evaluated include: documentation, set-up, hardware/software

  19. 76 FR 76476 - Notice of Meeting of the Cultural Property Advisory Committee

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-07

    ... Notice 7658; Cyprus Docket No. DOS-2011-0135; Peru Docket No. DOS-2011-0136] Notice of Meeting of the... with Peru Memorandum of Understanding Between the Government of the United States of America and the Government of the Republic of Peru Concerning the Imposition of Import Restrictions on...

  20. 77 FR 36329 - Notice of Intent to Prepare an Environmental Impact Statement and Notice of Scoping Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-18

    ... responsible for international relations of the United States, is to shape and sustain a peaceful, prosperous... American people and people around the world. DOS has a number of domestic and international... Columbia. In response, pursuant to the International Chancery Act of 1968, Congress authorized DOS...

  1. The Challenges for Physicians of Demonstrating Continuing Competence in the Changing World of Medical Regulation: Osteopathic Pediatrician Case Report

    ERIC Educational Resources Information Center

    Langenau, Erik E.; Gimpel, John R.

    2012-01-01

    The current system of continuing medical education, maintenance of certification, and renewal of medical licenses can be quite burdensome and inefficient for all practicing physicians: medical doctors (M.D.s) and doctors of osteopathic medicine (D.O.s). D.O.s have opportunities for residency training and specialty certification which are not

  2. Measuring Student Learning in Social Justice Courses: The Diversity and Oppression Scale

    ERIC Educational Resources Information Center

    Windsor, Liliane Cambraia; Shorkey, Clay; Battle, DuWayne

    2015-01-01

    The Diversity and Oppression Scale (DOS) is a standardized instrument measuring self-reported student learning about diversity and oppression based on requirements of the Council on Social Work Education. DOS was tested with social work students in 2 major North American universities. Factor structure was examined using exploratory factor analysis

  3. RESPSYST: An Interactive Microcomputer Program for Education.

    ERIC Educational Resources Information Center

    Boyle, Joseph

    1985-01-01

    RESPSYST is a computer program (written in BASICA and using MS-DOS/PC-DOS microcomputers) incorporating more than 20 of the factors that determine gas transport by the cardio-respiratory system. The five-part program discusses most of these factors, provides several question/answer sections, and relies heavily on graphics to demonstrate

  4. Yours, Mine or Ours: What Counts as Innovation?

    ERIC Educational Resources Information Center

    Cooksey, Ray W.

    2011-01-01

    In this paper, I argue that research and development organizations (R&DOs) have particular perspectives on what counts as an innovation whereas the potential adopting users usually have quite different often diverse perspectives. If these "worldviews" do not overlap or speak to each other, then what R&DOs consider innovative might constitute a…

  5. 32 CFR Appendix B to Part 197 - Procedures for Historical Researchers Permanently Assigned Within the Executive Branch Working on...

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... (CIA) and National Security Council (NSC) are not signatories to the Agreement. Authorization for... from the CIA, NSC, Department of State (DoS), and any other non-DoD Agency whose classified information... historian, authorization for access must be obtained from the CIA, NSC, DoS, and any other non-DoD...

  6. 32 CFR Appendix B to Part 197 - Procedures for Historical Researchers Permanently Assigned Within the Executive Branch Working on...

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... (CIA) and National Security Council (NSC) are not signatories to the Agreement. Authorization for... from the CIA, NSC, Department of State (DoS), and any other non-DoD Agency whose classified information... historian, authorization for access must be obtained from the CIA, NSC, DoS, and any other non-DoD...

  7. 32 CFR Appendix B to Part 197 - Procedures for Historical Researchers Permanently Assigned Within the Executive Branch Working on...

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... (CIA) and National Security Council (NSC) are not signatories to the Agreement. Authorization for... from the CIA, NSC, Department of State (DoS), and any other non-DoD Agency whose classified information... historian, authorization for access must be obtained from the CIA, NSC, DoS, and any other non-DoD...

  8. 32 CFR Appendix B to Part 197 - Procedures for Historical Researchers Permanently Assigned Within the Executive Branch Working on...

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... (CIA) and National Security Council (NSC) are not signatories to the Agreement. Authorization for... from the CIA, NSC, Department of State (DoS), and any other non-DoD Agency whose classified information... historian, authorization for access must be obtained from the CIA, NSC, DoS, and any other non-DoD...

  9. 32 CFR Appendix B to Part 197 - Procedures for Historical Researchers Permanently Assigned Within the Executive Branch Working on...

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... (CIA) and National Security Council (NSC) are not signatories to the Agreement. Authorization for... from the CIA, NSC, Department of State (DoS), and any other non-DoD Agency whose classified information... historian, authorization for access must be obtained from the CIA, NSC, DoS, and any other non-DoD...

  10. Are dangerous offenders different from other offenders? A clinical profile.

    PubMed

    Langevin, Ron; Curnoe, Suzanne

    2014-07-01

    The Canadian dangerous offender (DO) statute requires the assistance of psychiatrists and psychologists in evaluating offenders' potential danger and risk of future offenses, without substantive supporting empirical clinical research on the topic. The present study compared 62 men facing Canadian DO applications to 2,414 non-DO sexual and violent offenders (ACs) and 62 non-DO offenders matched on offense type (MCs). DOs differed significantly from ACs on 30 of 45 variables and from MCs only on 6. More DOs than MCs had an extensive criminal history, were psychopaths, and had more school truancy. Compared with ACs, DOs had less education and more school adjustment problems, more disturbed childhoods, and more often were diagnosed with sadism, psychopathy, and substance abuse problems. Total sexual and violent offense convictions provided the best but weak distinction of DOs from ACs. The "three strikes" law is noted and early intervention in DOs' criminal careers is discussed. PMID:23525177

  11. Electronic structure and vibrational entropies of fcc Au-Fe alloys

    NASA Astrophysics Data System (ADS)

    Muñoz, J. A.; Lucas, M. S.; Mauger, L.; Halevy, I.; Horwath, J.; Semiatin, S. L.; Xiao, Yuming; Chow, Paul; Stone, M. B.; Abernathy, D. L.; Fultz, B.

    2013-01-01

    Phonon density of states (DOS) curves were measured on alloys of face-centered-cubic (fcc) Au-Fe using nuclear resonant inelastic x-ray scattering (NRIXS) and inelastic neutron scattering (INS). The NRIXS and INS results were combined to obtain the total phonon DOS and the partial phonon DOS curves of Au and Fe atoms from which vibrational entropies were calculated. The main effect on the vibrational entropy of alloying comes from a stiffening of the Au partial phonon DOS with Fe concentration. Force constants were calculated from first principles for several compositions and show a local stiffening of Au-Au bonds close to Fe atoms. The calculated phonon DOS curves reproduce the experimental trend. The stiffening is attributed to two main effects comparable in magnitude: (i) an increase in electron density in the free-electron-like states and (ii) stronger sd hybridization.

  12. Electronic structure and vibrational entropies of fcc Au-Fe alloys

    SciTech Connect

    Munoz, Jorge A.; Lucas, Matthew; Mauger, L; Halevy, I; Horwath, J; Semiatin, S L; Xiao, Yuming; Stone, Matthew B; Abernathy, Douglas L; Fultz, B.

    2013-01-01

    Phonon density of states (DOS) curves were measured on alloys of face-centered-cubic (fcc) Au-Fe using nuclear resonant inelastic x-ray scattering (NRIXS) and inelastic neutron scattering (INS). The NRIXS and INS results were combined to obtain the total phonon DOS and the partial phonon DOS curves of Au and Fe atoms. The 57Fe partial phonon DOS of the dilute alloy Au0.97 57Fe0.03 shows a localized mode centered 4.3% above the cutoff energy of the phonons in pure Au. The Mannheim model for impurity modes accurately reproduced this partial phonon DOS using the fcc Au phonon DOS with a ratio of host-host to impurity-host force constants of 1.55. First-principles calculations validated the assumption of first-nearest-neighbor forces in the Mannheim model and gave a similar ratio of force constants. The high energy local mode broadens with increasing Fe composition, but this has a small effect on the composition dependence of the vibrational entropy. The main effect on the vibrational entropy of alloying comes from a stiffening of the Au partial phonon DOS with Fe concentration. This stiffening is attributed to two main effects: 1) an increase in electron density in the free-electron-like states, and 2) stronger sd-hybridization. These two effects are comparable in magnitude.

  13. Embryonic Stem Cells License a High Level of Dormant Origins to Protect the Genome against Replication Stress

    PubMed Central

    Ge, XinQuan; Han, Jinah; Cheng, Ee-Chun; Yamaguchi, Satoru; Shima, Naoko; Thomas, Jean-Leon; Lin, Haifan

    2015-01-01

    Summary Maintaining genomic integrity during DNA replication is essential for stem cells. DNA replication origins are licensed by the MCM27 complexes, with most of them remaining dormant. Dormant origins (DOs) rescue replication fork stalling in S phase and ensure genome integrity. However, it is not known whether DOs exist and play important roles in any stem cell type. Here, we show that embryonic stem cells (ESCs) contain more DOs than tissue stem/progenitor cells such as neural stem/progenitor cells (NSPCs). Partial depletion of DOs does not affect ESC self-renewal but impairs their differentiation, including toward the neural lineage. However, reduction of DOs in NSPCs impairs their self-renewal due to accumulation of DNA damage and apoptosis. Furthermore, mice with reduced DOs show abnormal neurogenesis and semi-embryonic lethality. Our results reveal that ESCs are equipped with more DOs to better protect against replicative stress than tissue-specific stem/progenitor cells. PMID:26190528

  14. Probing Phase Coherence Via Density of States for Strongly Correlated Excitons

    NASA Astrophysics Data System (ADS)

    Apinyan, V.; Kopeć, T. K.

    2015-03-01

    We present the calculation of the coherent spectral functions and density of states (DOS) for excitonic systems in the frame of the three-dimensional extended Falicov-Kimball model. Using gage-invariant U(1) transformation to the usual fermions, we represent the electron operator as a fermion attached to the U(1) phase-flux tube. The emergent bosonic gage field, related to the phase variables, is crucial for the Bose-Einstein condensation (BEC) of excitons. Employing the path-integral formalism, we manipulate the bosonic and fermionic degrees of freedom to obtain the effective actions related to fermionic and bosonic sectors. Considering the normal and anomalous excitonic Green functions, we calculate the spectral functions, which have the forms of convolutions in the reciprocal space between bosonic and fermionic counterparts. For the fermionic incoherent part of the DOS, we have found the strong evidence of the hybridization gap in DOS spectra. Furthermore, considering Bogoliubov coherence mechanism, we calculate the coherent DOS spectra. For the coherent normal fermionic DOS, there is no hybridization gap found in the system due to strong coherence effects and phase stiffness. The similar behavior is observed also for the condensate part of the anomalous excitonic DOS spectra. We show that for small values of the Coulomb interaction the fermionic DOS exhibits a Bardeen-Cooper-Schrieffer (BCS)-like double-peak structure. In the BEC region of the BCS-BEC crossover, the double-peak structure disappears totally for both: coherent and incoherent DOS spectra. We discuss also the temperature dependence of DOS functions.

  15. Vibrational Properties of Nanograins and Interfaces in Nanocrystalline Materials

    SciTech Connect

    Stankov, S.; Sergueev, I.; Chumakov, A. I.; Rueffer, R.; Yue, Y. Z.; Hu, L.; Miglierini, M.; Sepiol, B.; Svec, P.

    2008-06-13

    The vibrational dynamics of nanocrystalline Fe{sub 90}Zr{sub 7}B{sub 3} was studied at various phases of crystallization. The density of phonon states (DOS) of the nanograins was separated from that of the interfaces for a wide range of grain sizes and interface thicknesses. The DOS of the nanograins does not vary with their size and down to 2 nm grains still closely resembles that of the bulk. The anomalous enhancement of the phonon states at low and high energies originates from the DOS of the interfaces and scales linearly to their atomic fraction.

  16. On the electronic structure and conduction properties of aperiodic DNA and proteins. II. Electronic structure of aperiodic DNA

    NASA Astrophysics Data System (ADS)

    Bakhshi, A. K.; Otto, P.; Ladik, J.; Seel, M.

    1986-10-01

    Electronic density of states (DOS) curves of single stranded periodic and aperiodic DNA base stacks (in B conformation) and of a fragment of a human gene, obtained with the help of ab initio matrix block negative factor counting (NFC) method are presented. The calculated large values of band gap obtained for these systems rule out the possibility of intrinsic conduction in them. It is also found that in contrast to the corresponding period systems, the peaks in the DOS curves of aperiodic systems are broader. The probable effects of these changes in the DOS on the possibility of hopping conduction in DNA are also discussed.

  17. State Memory and Reentrance in a Paramagnetically Limited Superconductor

    NASA Astrophysics Data System (ADS)

    Butko, V. Yu.; Adams, P. W.; Meletis, E. I.

    1999-11-01

    We report observations of a new quasistatic nonequilibrium phenomenon in the density of electronic states (DOS) of a superconductor. Tunneling measurements of the DOS of ultrathin Al films, at the spin paramagnetically limited parallel magnetic field transition, reveal a strongly hysteretic DOS spectrum. We show that the hysteresis can be characterized as a quasistatic state memory effect in which the state of a film (normal or superconducting) is determined by its state prior to entering the hysteretic region. We also show that state memory can lead to the onset of superconductivity with increasing temperature, i.e., reentrance.

  18. Direct observation of the non-supported metal nanoparticle electron density of states by X-ray photoelectron spectroscopy

    NASA Astrophysics Data System (ADS)

    Tchaplyguine, M.; Peredkov, S.; Rosso, A.; Schulz, J.; -Hrwall, G.; Lundwall, M.; Rander, T.; Lindblad, A.; Bergersen, H.; Pokapanich, W.; Svensson, S.; Sorensen, S. L.; Mrtensson, N.; Bjrneholm, O.

    2007-11-01

    Synchrotron-based X-ray photoelectron spectroscopy on copper and silver cluster beams created by a magnetron-based gas-aggregation source has allowed mapping the electron density of states (DOS) of free metallic nanoparticles. The cluster DOS profiles obtained in the experiments strongly resemble the infinite solid DOS shapes, but the extracted cluster work-functions are lower than those for the bulk metal. The latter observation is explained by the initial negative charge on most of the clusters, created by the source.

  19. Parenting

    MedlinePLUS

    ... parents, people are always ready to offer advice. Parenting tips, parents' survival guides, dos, don'ts, shoulds ... right" way to be a good parent. Good parenting includes Keeping your child safe Showing affection and ...

  20. Two-current model of the composition dependence of resistivity in amorphous (Fe{sub 100-x}Co{sub x}){sub 89-y}Zr{sub 7}B{sub 4}Cu{sub y} alloys using a rigid-band assumption

    SciTech Connect

    Shen, S.; Ohodnicki, P. R.; Kernion, S. J.; McHenry, M. E.

    2012-11-15

    Composition dependence of resistivity is studied in amorphous (Fe{sub 100?x}Co{sub x}){sub 89?y}Zr{sub 7}B{sub 4}Cu{sub y} (0???x???50, y?=?0, 1) alloys. The two-current model proposed by Mott for crystalline materials is extended to a disordered amorphous system where s-d scattering is dominant in electron conduction. A rigid-band assumption is made due to the small atomic number difference between Fe and Co. Band structures with a constant density of states (DOS), parabolic distributed DOS, and Gaussian distributed DOS were investigated to fit experimental data. The Gaussian distributed DOS was found to simulate the resistivity maximum and magnetic moment maximum in the Fe-rich region. The basic concepts presented here can potentially provide insight into the optimization of FeCo-based HITPERM alloys for applications at increased frequencies.

  1. Signature of the long range triplet proximity effect in the density of states

    NASA Astrophysics Data System (ADS)

    Kneevi?, Milo; Trifunovic, Luka; Radovi?, Zoran

    2012-03-01

    We study the impact of the long range spin-triplet proximity effect on the density of states (DOS) in planar SF1F2S Josephson junctions that consist of conventional superconductors (S) connected by two metallic monodomain ferromagnets (F1 and F2) with transparent interfaces. We determine the electronic DOS in F layers for arbitrary orientation of the magnetizations using the solutions of Eilenberger equations in the clean limit and for a moderate concentration of impurities in ferromagnets. We find that a fully developed long range proximity effect occurs in Josephson junctions with a highly asymmetric ferromagnetic bilayer. For orthogonal magnetizations, the effect manifests itself as an enhancement in DOS and as a dominant second harmonic in the Josephson current-phase relation. Distinctive variation of DOS in ferromagnets with the angle between magnetizations is experimentally observable by tunneling spectroscopy. This can provide an unambiguous signature of the long range spin-triplet proximity effect.

  2. 76 FR 72855 - Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-28

    ... Procedures (44 FR 11034, February 26, 1979); and 3. Will not have a significant economic impact, positive or..., 2170-Putim- 12227-901 S o Jose dos Campos-SP-BRASIL; telephone +55 12 3927- 5852 or +55 12...

  3. No role for phonon entropy in the fcc{yields}fcc volume collapse transition in Ce{sub 0.9}Th{sub 0.1} at ambient pressure.

    SciTech Connect

    Manley, M. E.; McQueeney, R. J.; Fultz, B.; Swan-Wood, T.; Delaire, O.; Goremychkin, E. A.; Cooley, J. C.; Hults, W. L.; Lashley, J. C.; Osborn, R.; Smith, J. L.; Materials Science Division; LANL; California Inst. of Tech.

    2003-01-01

    Phonon densities of states (DOS) were obtained from inelastic neutron scattering measurements on Ce{sub 0.9}Th{sub 0.1} at temperatures from 10 to 300 K. The {alpha} phase showed a significant softening of its phonon DOS when heated from 10 to 140 K. Despite the 17% volume collapse, the phonon DOS showed little change between the {gamma} phase at 150 K and the {alpha} phase at 140 K. This is supported by analysis of the magnetic spectra showing that most of the transition entropy can be accounted for with the crystal field and changes in the ground-state spin fluctuations. We argue that the anomalous behavior of the phonon DOS originates with the volume dependence of the ground-state spin fluctuations.

  4. Computer Viruses: An Overview.

    ERIC Educational Resources Information Center

    Marmion, Dan

    1990-01-01

    Discusses the early history and current proliferation of computer viruses that occur on Macintosh and DOS personal computers, mentions virus detection programs, and offers suggestions for how libraries can protect themselves and their users from damage by computer viruses. (LRW)

  5. Infografa: beneficios y perjuicios de la prueba del PSA para la deteccin del cncer de prstata

    Cancer.gov

    Infografa que muestra los beneficios y perjuicios de la prueba del PSA para la deteccin del cncer de prstata, segn estimaciones de dos estudios sobre exmenes de deteccin del cncer de prstata.

  6. Thermodynamics and excitations of Coulomb glass

    NASA Astrophysics Data System (ADS)

    Malik, Vikas; Kumar, Deepak

    2007-09-01

    We have calculated the phase diagram and density of states of single-particle excitations of a lattice model of the Coulomb glass. We employ the replica method to average over disorder and then use linked-cluster expansion to obtain the free energy in the random phase approximation. We find that the system has a transition to an antiferromagnetic phase below a critical disorder. Above the critical disorder, the system has a glassy independent spin phase at zero temperature which crosses over to paramagnetic phase as the temperature is increased. In the antiferromagnetic phase, the single-particle excitation density [density of states (DOS)] has a feature including the gap at the Fermi level due to long-range order. To obtain DOS in the glassy phase, we analyze cavity-field equations for local magnetization (occupation). We obtain DOS at nonzero temperatures and find that with temperature the DOS at the Fermi level increases quadratically and the Coulomb gap decreases linearly.

  7. Formation mechanical properties and the sonic log

    SciTech Connect

    Elphick, R.Y.

    1988-11-01

    A program is presented that calculates the mechanical properties of reservoir rocks from sonic logs. The program was written in Microsoft BASIC and the source code for MS-DOS, Apple Macintosh, and Amiga personal computers is given.

  8. Ensuring Safe Use of Contact Lens Solution

    MedlinePLUS

    ... For Consumers Consumer Updates Ensuring Safe Use of Contact Lens Solution Share Tweet Linkedin Pin it More ... back to top Dos and Don'ts for Contact Lens Wearers DO: Always wash your hands before ...

  9. An Expert System for Identification of Minerals in Thin Section.

    ERIC Educational Resources Information Center

    Donahoe, James Louis; And Others

    1989-01-01

    Discusses a computer database which includes optical properties of 142 minerals. Uses fuzzy logic to identify minerals from incomplete and imprecise information. Written in Turbo PASCAL for MS-DOS with 128K. (MVL)

  10. A Viso do Universo Segundo a Concepo de um Grupo de Alunos do Ensino Mdio de So Paulo

    NASA Astrophysics Data System (ADS)

    Arajo, M. A. A.; Elias, D. C. N.; Amaral, L. H.; Arajo, M. S. T.; Voelzke, M. R.

    2005-12-01

    Nesse trabalho foi identificada por meio de um questionrio a viso de mundo sobre o Universo espao e tempo entre 270 estudantes de Ensino Mdio de trs escolas de So Paulo. Constatou-se pouco conhecimento dos temas investigados sendo que apenas 20% dos alunos relacionaram as semanas com as fases da lua enquanto 28% associaram as estaes do ano inclinao do eixo de rotao da Terra e 23% tinham noes das distncias entre objetos celestes prximos da Terra. Enquanto 56% conseguiram relacionar o Big Bang com a origem do Universo verificou-se que 37% reconheciam ano-luz como unidade de distncia e 60% reconheciam o Sol como uma estrela. Apesar de 60% dos alunos indicarem a escola como principal fonte dos conhecimentos de astronomia seus conceitos ainda so inadequados havendo necessidade de aprimoramento da abordagem desses contedos pois apesar de popular a astronomia veiculada de maneira pouco esclarecedora e com imprecisses.

  11. Improvement of mobility edge model by using new density of states with exponential tail for organic diode

    NASA Astrophysics Data System (ADS)

    Muhammad Ammar, Khan; Sun, Jiu-Xun

    2015-04-01

    The mobility edge (ME) model with single Gaussian density of states (DOS) is simplified based on the recent experimental results about the Einstein relationship. The free holes are treated as being non-degenerate, and the trapped holes are dealt with as being degenerate. This enables the integral for the trapped holes to be easily realized in a program. The J-V curves are obtained through solving drift-diffusion equations. When this model is applied to four organic diodes, an obvious deviation between theoretical curves and experimental data is observed. In order to solve this problem, a new DOS with exponential tail is proposed. The results show that the consistence between J-V curves and experimental data based on a new DOS is far better than that based on the Gaussian DOS. The variation of extracted mobility with temperature can be well described by the Arrhenius relationship. Project supported by the National Natural Science Foundation of China (Grant No. 31470822).

  12. Melting of palladium clusters density of states determination by Monte Carlo simulation

    NASA Astrophysics Data System (ADS)

    Westergren, Jan; Nordholm, Sture

    2003-05-01

    The density of states (DOS) has been calculated for the metal clusters Pd13, Pd55 and Pd147 using the recently proposed reference system equilibration (RSE) method. The interaction within the clusters was described by a many-body alloy potential. Using this DOS, the caloric curve of Pd13 has been calculated and excellent agreement with canonical Monte Carlo simulations is obtained. For Pd55 and Pd147, the solid and one molten isomers have been isolated in order to calculate the DOS for the isomers separately. The melting of the clusters occurs when the DOS for the solid and the molten isomers are equal. Comparison with previous microcanonical Monte Carlo simulations shows that the number of statistically equivalent molten isomers are 1.1×10 18 for Pd55 and 4.1×10 41 for Pd147.

  13. Quantification of joint inflammation in rheumatoid arthritis by time-resolved diffuse optical spectroscopy and tracer kinetic modeling

    NASA Astrophysics Data System (ADS)

    Ioussoufovitch, Seva; Morrison, Laura B.; Lee, Ting-Yim; St. Lawrence, Keith; Diop, Mamadou

    2015-03-01

    Rheumatoid arthritis (RA) is characterized by chronic synovial inflammation, which can cause progressive joint damage and disability. Diffuse optical spectroscopy (DOS) and imaging have the potential to become potent monitoring tools for RA. We devised a method that combined time-resolved DOS and tracer kinetics modeling to rapidly and reliably quantify blood flow in the joint. Preliminary results obtained from two animals show that the technique can detect joint inflammation as early as 5 days after onset.

  14. Simulium (Inaequalium) marins, a new species of black fly (Diptera: Simuliidae) from inselbergs in Brazil.

    PubMed

    Pepinelli, Mateus; Hamada, Neusa; Currie, Douglas C

    2009-08-01

    A new species of black fly, Simulium (Inaequalium) marins (Diptera: Simuliidae), is described based on the male, female, pupa and larva. This new species was collected from two localities: a small stream on the Pico dos Marins, a high mountain with granite outcrops in Piquete County, state of So Paulo, and in a small stream in the Serra dos Orgos National Park, state of Rio de Janeiro, Brazil. PMID:19820834

  15. Algebraic theory of crystal vibrations: Singularities and zeros in vibrations of one- and two-dimensional lattices

    NASA Astrophysics Data System (ADS)

    Iachello, F.; Dietz, B.; Miski-Oglu, M.; Richter, A.

    2015-06-01

    A novel method for the calculation of the energy dispersion relation and density of states (DOS) in one (1D) and two (2D) dimensions is introduced and applied to linear lattices (1D) and square and hexagonal lattices (2D). The (van Hove) singularities and (Dirac) zeros of the DOS are discussed. Results for the 2D hexagonal lattice (graphenelike materials) are compared with experimental data in microwave photonic crystals.

  16. Electron states at superconducting-normal interfaces

    SciTech Connect

    Yang, Z.; Gong, C.; Cai, J.

    1981-01-01

    Electron states at superconducting-normal interfaces have been studied using Kalkstein-Soven type Green's functions; dispersion curves of interface states and density of states (DOS) curves at various atomic planes are obtained. Two points are worth noticing: (1) there are breaks in the dispersion curves which are absent in normal-normal interface states; (2) on the normal conductor side, the DOS at the first few atomic planes also has the characteristics of the superconductor side.

  17. Modeling sediment resuspension-induced DO variation in fine-grained streams.

    PubMed

    Zahraeifard, Vahid; Deng, Zhiqiang

    2012-12-15

    Dissolved Oxygen (DO) levels in streams with nutrient enriched fine-grained sediment are highly affected by sediment resuspension. This paper presents a new model, called VART-DOS model, for simulation of instream DO transport, DO exchanges across water-sediment and water-air interfaces, and DO variation in response to sediment resuspension. The sediment resuspension effect is described by introducing a lumped term as a product of DO concentration and a rate of sediment resuspension-induced DO consumption (?). The rate parameter ? is defined as a nonlinear function of average summer temperature of water and several sediment erosion-related parameters. This is a novel and unique feature of the VART-DOS model. Based on sensitivity analysis, effects of BOD and Sediment Oxygen Demand (SOD) on DO consumption are not so important as compared to sediment resuspension which can cause up to 83% reduction in DO level during high flow. The VART-DOS model was applied to the Lower Amite River in Louisiana, USA to perform continuous simulations of DO fluctuations in the winter month January and the summer month July involving several flood-induced sediment resuspension events. Simulation results indicate that the VART-DOS model is capable of capturing overall variation trends in DO concentration. The Normalized Root Mean Square Error (RMSE) between VART-DOS simulated and observed DO levels was 0. 42 for January and 0.23 for July, demonstrating the efficacy of the VART-DOS model. PMID:23137983

  18. Density of quantum states in quasi-1D layers

    NASA Astrophysics Data System (ADS)

    Kakulia, D.; Tavkhelidze, A.; Gogoberidze, V.; Mebonia, M.

    2016-04-01

    Recently, new quantum effects have been studied in thin nanograting layers. Nanograting on the surface imposes additional boundary conditions on the electron wave function and reduces the density of states (DOS). When the nanograting dimensions are close to the de Broglie wavelength, the DOS reduction is considerable and leads to changes in the layer properties. DOS calculations are challenging to perform and are related to the quantum billiard problem. Performing such calculations requires finding the solutions for the time-independent Schrödinger equation with Dirichlet boundary conditions. Here, we use a numerical method, namely the Method of Auxiliary Sources, which offers significant computational cost reduction relative to other numerical methods. We found the first five eigenfunctions for the nanograting layer and compared them with the corresponding eigenfunctions for a plain layer by calculating the correlation coefficients. Furthermore, the numerical data were used to analyze the DOS reduction. The nanograting is shown to reduce the probability of occupation of a particular quantum state, reducing the integrated DOS by as much as 4.1-fold. This reduction in the DOS leads to considerable changes in the electronic properties.

  19. Energy resolved electrochemical impedance spectroscopy for electronic structure mapping in organic semiconductors

    SciTech Connect

    Nádaždy, V. Gmucová, K.; Schauer, F.

    2014-10-06

    We introduce an energy resolved electrochemical impedance spectroscopy method to map the electronic density of states (DOS) in organic semiconductor materials. The method consists in measurement of the charge transfer resistance of a semiconductor/electrolyte interface at a frequency where the redox reactions determine the real component of the impedance. The charge transfer resistance value provides direct information about the electronic DOS at the energy given by the electrochemical potential of the electrolyte, which can be adjusted using an external voltage. A simple theory for experimental data evaluation is proposed, along with an explanation of the corresponding experimental conditions. The method allows mapping over unprecedentedly wide energy and DOS ranges. Also, important DOS parameters can be determined directly from the raw experimental data without the lengthy analysis required in other techniques. The potential of the proposed method is illustrated by tracing weak bond defect states induced by ultraviolet treatment above the highest occupied molecular orbital in a prototypical σ-conjugated polymer, poly[methyl(phenyl)silylene]. The results agree well with those of our previous DOS reconstruction by post-transient space-charge-limited-current spectroscopy, which was, however, limited to a narrow energy range. In addition, good agreement of the DOS values measured on two common π-conjugated organic polymer semiconductors, polyphenylene vinylene and poly(3-hexylthiophene), with the rather rare previously published data demonstrate the accuracy of the proposed method.

  20. Sobre a largura da ltima superfcie de espalhamento

    NASA Astrophysics Data System (ADS)

    Nobre, M. A. S.; Pires, N.; Lima, J. A. S.

    2003-08-01

    De acordo com o modelo do "Big-Bang", no universo primordial a matria estava em equilbrio trmico com a radiao. Com a expanso a temperatura da radiao cai. Quando a temperatura chega em torno dos 4.000K, os espalhamentos diminuem, comeando a recombinao dos prtons e eltrons em Hidrognio neutro (era conhecida como da recombinao). Ao final da recombinao, os ftons se propagam livremente sofrendo, em princpio, somente os efeitos do "redshift" cosmolgico. Esses ftons nos alcanam hoje como a radiao csmica de fundo (RCF), e parecem vir de uma superfcie esfrica ao nosso redor, tal que o raio dela a distncia que ele viajou desde seu ltimo espalhamento na poca da recombinao. Naturalmente, esse processo no ocorreu abruptamente, implicando na existncia de uma largura no espao dos "redshifts" que deve depender do modelo cosmolgico especfico e dos processos fsicos considerados. Neste trabalho analisamos os efeitos de diferentes modelos - a saber, aqueles com decaimento do vcuo L(t), criao de matria, quintessncia e gs de Chaplygin - sobre a ltima superfcie de espalhamento da RCF, em particular sua largura e a funo visibilidade, que determina a probabilidade de um fton ter tido seu ltimo espalhamento num "redshift" z. No caso particular dos modelos com decaimento do vcuo, existe uma forte dependncia da funo visibilidade com L(t). Tais efeitos podero ser testados atravs da anlise dos resultados de experimentos mais precisos que esto atualmente em andamento, como por exemplo, o WMAP.

  1. A Concepo de Universo entre Alunos do Ensino Mdio de So Paulo e suas Fontes de Aquisio

    NASA Astrophysics Data System (ADS)

    Arajo, M. A. A.; Elias, D. C. N.; Amaral, L. H.; Arajo, M. S. T.; Voelzke, M. R.

    2006-08-01

    Nesse trabalho procurou-se identificar por meio de um questionrio as concepes de Universo, de espao e tempo que sustentam a viso de mundo de um grupo de 270 estudantes de Ensino Mdio, pertencentes a trs escolas de So Paulo. As questes relacionadas aos conhecimentos prvios dos estudantes permitiram constatar que h pouco conhecimento acerca dos temas investigados, destacando-se que apenas 20% dos alunos foram capazes de relacionar as semanas com as fases da lua, enquanto 28% associaram as estaes do ano inclinao do eixo de rotao da Terra e 23% tinham noes das distncias entre objetos celestes prximos da Terra. Enquanto 56% conseguiram relacionar o Big Bang com a origem do Universo, verificou-se que 37% reconheciam ano-luz como unidade de distncia e 60% concebiam o Sol como uma estrela. No que se refere s fontes de aquisio que proporcionaram esses conhecimentos, apesar de 60% dos alunos indicarem a escola como principal fonte dos conhecimentos de Ast! ronomia, verificou-se claramente que para a maioria dos alunos seus conceitos ainda so inadequados, havendo necessidade de aprimoramento da abordagem desses contedos, pois apesar de popular, a Astronomia ainda veiculada de maneira pouco esclarecedora e com imprecises. Nesse contexto, so discutidas algumas possveis contribuies que podem ser dadas para o ensino de Astronomia pelo uso das ferramentas computacionais nas escolas.

  2. Como os Alunos do Ensino Mdio da Rede Estadual de So Paulo obtm Conhecimentos Astronmicos?

    NASA Astrophysics Data System (ADS)

    da Cunha, W. S.; Voelzke, M. R.; Amaral, L. H.

    2005-08-01

    Atualmente vivencia-se um mundo globalizado onde os computadores e a internet permitiram um acesso rpido e seguro a todo tipo de informao e conhecimento. O presente trabalho visa analisar a maneira pela qual alunos de segundo grau da rede estadual da cidade de So Paulo obtiveram, caso tenham, conhecimentos bsicos de astronomia quanto aos fenmenos celestes que os rodeiam, tais como a sucesso dos dias e das estaes do ano, alm de question~los sobre fatos genricos tais como: o que vem a ser o Sol, o Big Bang, o que ocasionou a extino dos dinossauros. Para tanto foi elaborado um formulrio constando de questes de mltipla escolha, o qual foi aplicado no primeiro colegial diurno da Escola Estadual Guilherme de Almeida. Num espao amostral de 44 alunos constatou-se que 41% dos alunos adquiriram seus conhecimentos astronmicos na escola e 59% atravs da mdia em geral. Neste mesmo espao amostral apenas 11% dos alunos usaram computadores na escola, 41% na residncia, 5% no trabalho e 43% no utilizaram. O presente estudo revelou tambm que para 50% dos alunos o professor jamais utilizou um programa de computador a respeito de astronomia ou fez alguma apresentao sobre o tema. Embora em sua fase inicial este estudo revela claramente que a maioria dos alunos no obtm na escola seus conhecimentos astronmicos, estes provm de fontes no especificamente didtico-pedaggicas tais como filmes e revistas populares que no raramente geram conhecimentos incompletos e em muitos casos inclusive falhos.

  3. Clinical usefulness of observational assessment in the diagnosis of DBD and ADHD in preschoolers.

    PubMed

    Bunte, Tessa L; Laschen, Sarah; Schoemaker, Kim; Hessen, David J; van der Heijden, Peter G M; Matthys, Walter

    2013-01-01

    The aim of the present study was to investigate the clinical usefulness of an observational tool--the Disruptive Behavior Diagnostic Observation Schedule (DB-DOS)--in the diagnosis of disruptive behavior disorders (DBD) and attention deficit/hyperactivity disorder (ADHD) in preschoolers. We hypothesized that the DB-DOS may help support the presumption of a diagnosis generated by the information from parents and teachers (or other caregivers). Participants were referred preschool children with externalizing behavioral problems (N = 193; 83% male) and typically developing children (N = 58; 71% male). In view of the clinical validity study each child was given a diagnosis of either DBD (N = 40), or ADHD (N = 54) or comorbid (DBD + ADHD; N = 66) based on best-estimate diagnosis. The DB-DOS demonstrated good interrater and test-retest reliability for DBD and ADHD symptom scores. Confirmatory factor analysis demonstrated an excellent fit of the DB-DOS multidomain model of DBD symptom scores and a satisfactory fit of ADHD symptom scores. The DB-DOS demonstrated good convergent validity, moderate divergent validity, and good clinical validity on a diagnostic group level for DBD and ADHD symptom scores. The Receiver Operating Characteristic curve analyses revealed that for DBD the sensitivity and specificity are moderate and for ADHD good to excellent. The presumption of a diagnosis based on information from parents, teachers, and cognitive assessment was supported by the DB-DOS in 60% for DBD and 75% for ADHD. The DB-DOS can be used to help support a presumption of a DBD and/or ADHD diagnosis in preschool children. PMID:23477379

  4. Molecular structure, bioinformatics analysis, expression and bioactivity of BAFF (TNF13B) in dog (Canis familiaris).

    PubMed

    Shen, Yuefen; Wang, Shule; Ai, Hongxin; Min, Cui; Chen, Yuqing; Zhang, Shuangquan

    2011-07-15

    B cell activating factor (BAFF), belonging to the tumor necrosis factor (TNF) family, plays an important role in B cell survival, proliferation and differentiation. In the present study, we amplified the cDNA of dog (Canis familiaris) BAFF (designated doBAFF) from spleen by reverse transcription-PCR (RT-PCR) and rapid amplification of cDNA ends (RACE) strategies. The open reading frame (ORF) of doBAFF covers 879 bp encoding 292 amino acids, with a 152-aa mature peptide. The soluble mature part of doBAFF (dosBAFF) shares 91.5%, 72.1%, 96.7%, 94.0% and 91.5% identity with the human, mouse, cattle, pig and rabbit counterparts, respectively. The predicted three-dimensional (3D) structural analysis of dosBAFF analyzed by "comparative protein modeling" revealed that it was very similar to its human counterpart. Real-time quantitative PCR analysis revealed that doBAFF was mainly expressed in spleen. Two fusion proteins SUMO-dosBAFF and GFP/dosBAFF were efficiently expressed in Escherichia coli BL21 (DE3) and purified using metal chelate affinity chromatography (Ni-NTA). Laser scanning confocal microscopy analysis showed that GFP/dosBAFF could bind to the mouse splenic B-cell. In vitro, SUMO-dosBAFF and GFP/dosBAFF were able to promote the survival/proliferation of dog lymphocytes or mouse splenic B cells with/without anti-IgM. Therefore, BAFF may be a potential immunologic factor for enhancing immunological efficacy in dog. PMID:21600667

  5. Carbon Nanotubes with Tailored Density of Electronic States for Electrochemical Applications.

    PubMed

    Song, Yingpan; Hu, Huifang; Feng, Miao; Zhan, Hongbing

    2015-11-25

    The density of electronic states (DOS) is an intrinsic electronic property that works conclusively in the electrochemistry of carbon materials. However, seldom has it been reported how the DOS at the Fermi level influences the electrochemical activity. In this work, we synthesized partially and fully unzipped carbon nanotubes by longitudinally unzipping pristine carbon nanotubes (CNTs). We then studied the electrochemical activity and biosensitivity of carbon materials by means of the CNTs and their derivatives to elucidate the effect of the DOS on their electrochemical performances. Tailoring of the DOS for the CNT derivatives could be conveniently realized by varying the sp(2)/sp(3) ratio (i.e., graphite concentration) through manipulating the oxidative unzipping degree. Despite the diverse electron transfer mechanisms and influence factors of the four investigated redox probes (IrCl6(2-), [Fe(CN)6](3-), Fe(3+), and ascorbic acid), the CNT derivatives exhibited consistent kinetic behaviors, wherein CNTs with a high DOS showed superior electrochemical response compared with partially and fully unzipped carbon nanotubes. For biological detection, the CNTs could simultaneously distinguish ascorbic acid, dopamine, and uric acid, while the three CNT derivatives could all differentiate phenethylamine and epinephrine existed in the newborn calf serum. Moreover, the three CNT derivatives all presented wide linear detection ranges with high sensitivities for dopamine, phenethylamine, and epinephrine. PMID:26540193

  6. Trap density of states in n-channel organic transistors: variable temperature characteristics and band transport

    SciTech Connect

    Cho, Joung-min Akiyama, Yuto; Kakinuma, Tomoyuki; Mori, Takehiko; ACT-C, JST, Honcho, Kawaguchi, Saitama 332-0012

    2013-10-15

    We have investigated trap density of states (trap DOS) in n-channel organic field-effect transistors based on N,N?-bis(cyclohexyl)naphthalene diimide (Cy-NDI) and dimethyldicyanoquinonediimine (DMDCNQI). A new method is proposed to extract trap DOS from the Arrhenius plot of the temperature-dependent transconductance. Double exponential trap DOS are observed, in which Cy-NDI has considerable deep states, by contrast, DMDCNQI has substantial tail states. In addition, numerical simulation of the transistor characteristics has been conducted by assuming an exponential trap distribution and the interface approximation. Temperature dependence of transfer characteristics are well reproduced only using several parameters, and the trap DOS obtained from the simulated characteristics are in good agreement with the assumed trap DOS, indicating that our analysis is self-consistent. Although the experimentally obtained Meyer-Neldel temperature is related to the trap distribution width, the simulation satisfies the Meyer-Neldel rule only very phenomenologically. The simulation also reveals that the subthreshold swing is not always a good indicator of the total trap amount, because it also largely depends on the trap distribution width. Finally, band transport is explored from the simulation having a small number of traps. A crossing point of the transfer curves and negative activation energy above a certain gate voltage are observed in the simulated characteristics, where the critical V{sub G} above which band transport is realized is determined by the sum of the trapped and free charge states below the conduction band edge.

  7. Toxicogenomic Screening of Replacements for Di(2-Ethylhexyl) Phthalate (DEHP) Using the Immortalized TM4 Sertoli Cell Line.

    PubMed

    Nardelli, Thomas C; Erythropel, Hanno C; Robaire, Bernard

    2015-01-01

    Phthalate plasticizers such as di(2-ethylhexyl) phthalate (DEHP) are being phased out of many consumer products because of their endocrine disrupting properties and their ubiquitous presence in the environment. The concerns raised from the use of phthalates have prompted consumers, government, and industry to find alternative plasticizers that are safe, biodegradable, and have the versatility for multiple commercial applications. We examined the toxicogenomic profile of mono(2-ethylhexyl) phthalate (MEHP, the active metabolite of DEHP), the commercial plasticizer diisononyl cyclohexane-1,2-dicarboxylate (DINCH), and three recently proposed plasticizers: 1,4-butanediol dibenzoate (BDB), dioctyl succinate (DOS), and dioctyl maleate (DOM), using the immortalized TM4 Sertoli cell line. Results of gene expression studies revealed that DOS and BDB clustered with control samples while MEHP, DINCH and DOM were distributed far away from the control-DOS-BDB cluster, as determined by principle component analysis. While no significant changes in gene expression were found after treatment with BDB and DOS, treatment with MEHP, DINCH and DOM resulted in many differentially expressed genes. MEHP upregulated genes downstream of PPAR and targeted pathways of cholesterol biosynthesis without modulating the expression of PPAR's themselves. DOM upregulated genes involved in glutathione stress response, DNA repair, and cholesterol biosynthesis. Treatment with DINCH resulted in altered expression of a large number of genes involved in major signal transduction pathways including ERK/MAPK and Rho signalling. These data suggest DOS and BDB may be safer alternatives to DEHP/MEHP than DOM or the commercial alternative DINCH. PMID:26445464

  8. Intraoperative optical assessment of photodynamic therapy response of superficial oral squamous cell carcinoma

    NASA Astrophysics Data System (ADS)

    Rohrbach, Daniel J.; Rigual, Nestor; Arshad, Hassan; Tracy, Erin C.; Cooper, Michelle T.; Shafirstein, Gal; Wilding, Gregory; Merzianu, Mihai; Baumann, Heinz; Henderson, Barbara W.; Sunar, Ulas

    2016-01-01

    This study investigated whether diffuse optical spectroscopy (DOS) measurements could assess clinical response to photodynamic therapy (PDT) in patients with head and neck squamous cell carcinoma (HNSCC). In addition, the correlation between parameters measured with DOS and the crosslinking of signal transducer and activator of transcription 3 (STAT3), a molecular marker for PDT-induced photoreaction, was investigated. Thirteen patients with early stage HNSCC received the photosensitizer 2-[1-hexyloxyethyl]-2-devinylpyropheophorbide-a (HPPH) and DOS measurements were performed before and after PDT in the operating room (OR). In addition, biopsies were acquired after PDT to assess the STAT3 crosslinking. Parameters measured with DOS, including blood volume fraction, blood oxygen saturation (StO2), HPPH concentration (cHPPH), HPPH fluorescence, and blood flow index (BFI), were compared to the pathologic response and the STAT3 crosslinking. The best individual predictor of pathological response was a change in cHPPH (sensitivity=60%, specificity=100%), while discrimination analysis using a two-parameter classifier (change in cHPPH and change in StO2) classified pathological response with 100% sensitivity and 100% specificity. BFI showed the best correlation with the crosslinking of STAT3. These results indicate that DOS-derived parameters can assess the clinical response in the OR, allowing for earlier reintervention if needed.

  9. Superconductivity in Bismuth. A New Look at an Old Problem

    PubMed Central

    2016-01-01

    To investigate the relationship between atomic topology, vibrational and electronic properties and superconductivity of bismuth, a 216-atom amorphous structure (a-Bi216) was computer-generated using our undermelt-quench approach. Its pair distribution function compares well with experiment. The calculated electronic and vibrational densities of states (eDOS and vDOS, respectively) show that the amorphous eDOS is about 4 times the crystalline at the Fermi energy, whereas for the vDOS the energy range of the amorphous is roughly the same as the crystalline but the shapes are quite different. A simple BCS estimate of the possible crystalline superconducting transition temperature gives an upper limit of 1.3 mK. The e-ph coupling is more preponderant in a-Bi than in crystalline bismuth (x-Bi) as indicated by the λ obtained via McMillan’s formula, λc = 0.24 and experiment λa = 2.46. Therefore with respect to x-Bi, superconductivity in a-Bi is enhanced by the higher values of λ and of eDOS at the Fermi energy. PMID:26815431

  10. The impact of interhospital transfers on surgical quality metrics for academic medical centers.

    PubMed

    Crippen, Cristina J; Hughes, Steven J; Chen, Sugong; Behrns, Kevin E

    2014-07-01

    The emergence of pay-for-performance systems pose a risk to an academic medical center's (AMC) mission to provide care for interhospital surgical transfer patients. This study examines quality metrics and resource consumption for a sample of these patients from the University Health System Consortium (UHC) and our Department of Surgery (DOS). Standard benchmarks, including mortality rate, length of stay (LOS), and cost, were used to evaluate the impact of interhospital surgical transfers versus direct admission (DA) patients from January 2010 to December 2012. For 1,423,893 patients, the case mix index for transfer patients was 38 per cent (UHC) and 21 per cent (DOS) greater than DA patients. Mortality rates were 5.70 per cent (UHC) and 6.93 per cent (DOS) in transferred patients compared with 1.79 per cent (UHC) and 2.93 per cent (DOS) for DA patients. Mean LOS for DA patients was 4 days shorter. Mean total costs for transferred patients were greater $13,613 (UHC) and $13,356 (DOS). Transfer patients have poorer outcomes and consume more resources than DA patients. Early recognition and transfer of complex surgical patients may improve patient rescue and decrease resource consumption. Surgeons at AMCs and in the community should develop collaborative programs that permit collective assessment and decision-making for complicated surgical patients. PMID:24987902

  11. LC-DAD-APCI-MS-based screening and analysis of the absorption and metabolite components in plasma from a rabbit administered an oral solution of danggui.

    PubMed

    Wang, Ya-Li; Liang, Yi-Zeng; Chen, Ben-Mei; He, Yong-Kang; Li, Bo-Yan; Hu, Qian-Nan

    2005-09-01

    A valid chromatographic fingerprint method using liquid chromatography-diode array detection-atmospheric pressure chemical ionization mass spectrometry in negative mode (LC-DAD-APCI-MS) is proposed for studying the absorption and metabolites of a traditional Chinese medicine (TCM) Angelica sinensis (danggui) in rabbit plasma, after the rabbit is administered with danggui oral solution (DOS). More than thirty-two common components were detected in both DOS and rabbit plasma, which shows that the components in the DOS were absorbed into the body of the rabbit. Of these, senkyunolide I, senkyunolide H, Z-6,7-epoxyligustilide, 3-butylidene-7-hydroxyphthalide, Z-ligustilide, Z-butylidenephthalide, Diels-Alder dimers of ligustilide, linolenic acid, linoleic acid and falcarindiol were tentatively identified from their MS, UV spectra and retention behavior by comparing the results with the published literature. At least ten components were found in rabbit plasma but not in DOS, indicating that these components must be metabolites of some of the components in the original extract. The results prove that the proposed method can be used to rapidly analyze multiple constituents in TCMs, and to screen for bioactive compounds by comparing and contrasting the chromatographic fingerprints of DOS and plasma samples. PMID:16132135

  12. On Ensino de Astronomia: Desafios para Implantao

    NASA Astrophysics Data System (ADS)

    Faria, R. Z.; Voelzke, M. R.

    2008-09-01

    Em 2002 o ensino de Astronomia foi proposto como um dos temas estruturadores pelos Parmetros Curriculares Nacionais e sugerido como facilitador para que o aluno compreendesse a Fsica como construo humana e parte do seu mundo vivencial, mas raramente seus conceitos foram ensinados. A presente pesquisa discute dois aspectos relacionados abordagem de Astronomia. O primeiro aspecto se ela est sendo abordada pelos professores do Ensino Mdio e o segundo, aborda a maneira como ela est sendo ensinada. Optou-se pela aplicao de um questionrio a partir do 2 semestre de 2006 e durante o ano de 2007 com professores que ministram a disciplina de Fsica, os quais trabalham em escolas estaduais em Rio Grande da Serra, Ribeiro Pires e Mau no estado So Paulo. Dos 66,2% dos professores que responderam ao questionrio nos municpios de Rio Grande da Serra, Ribeiro Pires e Mau, 57,4% no aplicaram nenhum tpico de astronomia, 70,2% no utilizaram laboratrio, 89,4% no utilizaram qualquer tipo de programa computacional, 83,0% nunca fizeram visitas com alunos a museus e planetrios e 38,3% no indicaram qualquer tipo de livro ou revista referente astronomia aos seus alunos. Mesmo considerando a Astronomia um contedo potencialmente significativo, esta no fez parte dos planejamentos escolares. Portanto so necessrias propostas que visem estratgias para a educao continuada dos professores como, por exemplo, cursos especficos sobre o ensino em Astronomia.

  13. A atuao do Observatrio Nacional registrada nos relatrios ministeriais 1889 a 1930

    NASA Astrophysics Data System (ADS)

    Rodrigues, T.

    2003-08-01

    O perodo republicano at 1930 foi marcante na histria do Observatrio Nacional. Diversas reformas levaram a instituio a trs ministrios diferentes e mudaram a nfase do seu trabalho. A to aguardada mudana para uma nova sede, em So Cristvo, em 1920, no foi suficiente para que a instituio acompanhasse o ritmo tomado pela astronomia no mundo e se firmasse como ambiente de pesquisa. Uma anlise simplificada poderia caracterizar um perodo de produo cientfica insignificante, dado o distanciamento da instituio dos novos rumos da astrofsica e da rpida inovao dos instrumentos, alm do pequeno volume de publicaes. Era uma poca em que ainda no existiam os mecanismos formais de apoio e avaliao da atividade cientfica. Esse trabalho procura identificar a real atividade do Observatrio no contedo dos Relatrios Ministeriais que, ao final de cada ano, apresentava as atividades, sucessos e problemas enfrentados pela instituio. Questes como instrumental e recursos humanos necessrios; entraves burocrticos e financeiros; e articulaes com outros observatrios se complementaram entre si ao longo desses anos para definir o perfil institucional e alguns aspectos fundamentais para a construo da astronomia no pas. possvel concluir que a nfase em servios geogrficos e de meteorologia, ao lado da inadequao dos instrumentos e do local, quase fizeram desaparecer a pesquisa em astronomia. Porm, vale destacar a sobrevivncia de alguns trabalhos, como, por exemplo, variao de latitude e observao de estrelas duplas que mantiveram importante intercmbio com outros grupos de pesquisa, demonstrando o constante esforo dos astrnomos e das diretorias em defesa da atividade cientfica.

  14. Microbial contamination of dental unit waterlines and effect on quality of indoor air.

    PubMed

    Kadaifciler, Duygu Gksay; Cotuk, Aysin

    2014-06-01

    The microbiological quality in dental unit waterlines (DUWLs) is considered to be important because patients and dental staff with suppressed immune systems are regularly exposed to water and aerosols generated from dental units (DUs). Opportunistic pathogens like Pseudomonas, Legionella, Candida, and Aspergillus can be present in DUWLs, while during consultations, bioaerosols can be dispersed in the air, thus resulting in effects on microbiological quality of indoor air. This present study represents microbiological air and water quality in dental offices (DOs) and also concerns the relationship between the quality of DO air and dental unit water. This study aimed to assess both the microbial quality of dental unit water and the indoor air in 20 DOs and to survey the effect on the quality of the indoor air with the existing microorganisms in dental unit water. Fourteen out of 20 (70 %) DUWLs were found to be contaminated with a high number of aerobic mesophilic heterotrophic bacteria. In terms of bacterial air contamination levels, in 90 % of DOs, a medium level (<500 colony-forming units (CFU)/m(3)) of contamination was determined, while in terms of microfungal air contamination, in all DOs, a low level (<100 CFU/m(3)) of contamination was determined. Potential infection or allergen agents, such as Pseudomonas, Micrococcus, Staphylococcus, Alternaria, Cladosporium, Penicillium, Aspergillus, and Paecilomyces were isolated from water and air samples. This study's determination of contamination sources and evaluation of microbial load in DOs could contribute to the development of quality control methods in the future. PMID:24469014

  15. Superconductivity in Bismuth. A New Look at an Old Problem.

    PubMed

    Mata-Pinzn, Zaahel; Valladares, Ariel A; Valladares, Renela M; Valladares, Alexander

    2016-01-01

    To investigate the relationship between atomic topology, vibrational and electronic properties and superconductivity of bismuth, a 216-atom amorphous structure (a-Bi216) was computer-generated using our undermelt-quench approach. Its pair distribution function compares well with experiment. The calculated electronic and vibrational densities of states (eDOS and vDOS, respectively) show that the amorphous eDOS is about 4 times the crystalline at the Fermi energy, whereas for the vDOS the energy range of the amorphous is roughly the same as the crystalline but the shapes are quite different. A simple BCS estimate of the possible crystalline superconducting transition temperature gives an upper limit of 1.3 mK. The e-ph coupling is more preponderant in a-Bi than in crystalline bismuth (x-Bi) as indicated by the ? obtained via McMillan's formula, ?c = 0.24 and experiment ?a = 2.46. Therefore with respect to x-Bi, superconductivity in a-Bi is enhanced by the higher values of ? and of eDOS at the Fermi energy. PMID:26815431

  16. Death obsession in Palestinians.

    PubMed

    Abdel-Khalek, Ahmed M; Al-Arja, Nahida S; Abdalla, Taysir

    2006-04-01

    The authors explored death obsession level and correlates among a sample (N = 601) of Palestinians living in the city of Beit Jala, the village of Al-Khader, and the Aida refugee camp in the Bethlehem area. They live in war conditions; the houses of half of them have been demolished. The Death Obsession Scale (DOS) was administered. Its alpha reliability was .92, denoting high internal consistency. Among women, it yielded 1 factor, (General Death Obsession), whereas among men it yielded 3 factors: Death Rumination, Death Dominance, and Death Idea Repetition. Palestinian men and women attained significantly lower DOS mean scores than participants from 4 Arab countries: Egypt, Kuwait, Syria, and Lebanon in 7 out of 8 comparisons. However, Palestinian women had significantly higher DOS mean score than their Spanish, American and British counterparts, whereas Palestinian men had significantly higher mean DOS score than Spanish peers. The low DOS scores of Palestinians, in proportion to other Arab samples, may reflect their adaptation to strife and violence. PMID:16463464

  17. Low-energy density of states in d-wave superconductors with extended scatterers

    NASA Astrophysics Data System (ADS)

    Adagideli, I.; Sheehy, D. E.; Goldbart, P. M.

    2002-03-01

    We investigate a novel contribution to the low-energy quasiparticle density of states (DOS) of a disordered d-wave superconductor. Related work (C. Pépin and P. A. Lee, Phys. Rev. B 63), 054502 (2001). found that the DOS is singular at zero energy, but it was later argued (A.G. Yashenkin et al., Phys. Rev. Lett. 86), 5982 (2001); A. Altland, cond-mat/0108079 (unpublished). that the results of Ref. [1] are valid only in special cases requiring fine-tuning of the parameters, and that the DOS vanishes at E=0 except in these cases. A common feature of these approaches is the assumption that the disorder potential is due to pointlike scatterers. However, previous work (I. Adagideli et al., Phys. Rev. Lett. 83) 5571 (1999). showed that the presence of extended impurities in d-wave superconductors gives rise to additional low-energy quasiparticle states. Motivated by this fact, we focus on the (previously neglected) contribution to the low-energy DOS arising from a disorder potential that consists of a random collection of extended impurities. We find that the DOS is singular at zero energy, diverging as ρ_ext(E) ~ 1/\\vert E(ln \\vert E\\vert)^3 \\vert. Our calculation neglects the role of nodal quasiparticles; indeed, we expect that they will merely furnish a subdominant additive contribution to ρ_ ext. This work was supported by D.O.E.

  18. The phonon density of states of (alpha) and (delta)-Plutonium by inelastic x-ray scattering

    SciTech Connect

    Manley, M E; Said, A; Fluss, M J; Wall, M; Lashley, J C; Alatas, A; Moore, K T

    2008-10-08

    Inelastic x-ray scattering measurements of the phonon density of states (DOS) were performed on polycrystalline samples of pure {alpha}-Pu and {delta}-Pu{sub 0.98}Ga{sub 0.02} at room temperature. The heat capacity of {alpha}-Pu is well reproduced by contributions calculated from the measured phonon DOS plus conventional thermal expansion and electronic contributions, showing that {alpha}-Pu is a 'well-behaved' metal in this regard. A comparison of the phonon DOS of the two phases at room temperature surprised us in that the vibrational entropy difference between them is only a quarter of the total entropy difference expected from known thermodynamic measurements. The missing entropy is too large to be accounted for by conventional electronic entropy and evidence from the literature rules out a contribution from spin fluctuations. Possible alternative sources for the missing entropy are discussed.

  19. Strong odd-frequency correlations in fully gapped Zeeman-split superconductors

    NASA Astrophysics Data System (ADS)

    Linder, Jacob; Robinson, Jason W. A.

    2015-10-01

    It is now well established that at a superconductor/ferromagnet (S/F) interface an unconventional superconducting state arises in which the pairing is odd-frequency. The hallmark signature of this superconducting state is generally understood to be an enhancement of the electronic density of states (DoS) at subgap energies close to the S/F interface. However, here we show that an odd frequency state can be present even if the DoS is fully gapped. As an example, we show that this is the case in the pioneering S/FI (where FI is a insulating ferromagnet) tunneling experiments of Meservey and Tedrow, and we derive a generalized analytical criterium to describe the effect of odd-frequency pairing on the DoS. Finally, we propose a simple experiment in which odd-frequency pairing in a Zeeman-split superconductor can be unambiguously detected via the application of an external magnetic field.

  20. Tunneling study of cavity grade Nb : possible magnetic scattering at the surface.

    SciTech Connect

    Prolier, T.; Zasadzinski, J. F.; Cooley, L.; Antoine, C.; Moore, J.; Pellin, M.; Norem, J.; Gray, K. E.; Materials Science Division; Illinois Inst. Tech.; FNAL; Centre d'etude de Saclay

    2008-01-01

    Tunneling spectroscopy was performed on Nb pieces prepared by the same processes used to etch and clean superconducting radio frequency (SRF) cavities. Air exposed, electropolished Nb exhibited a surface superconducting gap {Delta} = 1.55 meV, which is characteristic of a clean, bulk Nb. However, the tunneling density of states (DOS) was significantly broadened. The Nb pieces, which were treated with the same mild baking used to improve the Q slope in SRF cavities, reveal a sharper DOS. Good fits to the DOS were obtained by using the Shiba theory, suggesting that magnetic scattering of quasiparticles is the origin of the gapless surface superconductivity and a heretofore unrecognized contributor to the Q-slope problem of Nb SRF cavities.

  1. [Slaves and citizens on Ilha Grande: the dawning of the Republic came slowly].

    PubMed

    Schnoor, Eduardo Cavalcanti

    2012-12-01

    The article introduces Ilha Grande, a district in the municipality of Angra dos Reis, and describes its role within the subsistence market economy and the memory of slavery as found in the Angra dos Reis Civil Records. According to the Almanaque Laemmert, this district had the largest number of slaves in the municipality as of the 1870s. Most owners had few slaves, and the majority of landholdings were small. The Angra dos Reis Civil Records did not forget slavery after May 1888. A number of birth and death notifications describe the persons in question as former slaves. Even in the twentieth century, clerks continued to describe various republican citizens as ex-slaves. PMID:23370108

  2. Multivalent Ion Screening of Charged Glass Surface Studied by Streaming Potential Measurements

    NASA Astrophysics Data System (ADS)

    Li, Ran; Todd, Brian

    2014-03-01

    Ions present in solution strongly modify local electrical properties of charged surfaces. While the effects of monovalent ions are accurately described by the Poisson-Boltzmann equation, the mechanism by which multivalent ions screen charged surfaces remains unclear. A recent theory by dos Santos et. al [A. P. dos Santos, A. Diehl, and Y. Levin, J. Chem. Phys. 132, 104105 (2010)] treats the electrolyte solution as consisting of two sub-systems: a strongly coupled liquid of multivalent ions adjacent to the charged surface and a gaslike phase further into the bulk. The theory makes quantitative predictions of the electric potential in solutions containing both multivalent and monovalent ions. We used the streaming potential technique to measure electric potentials over a range of multivalent and monovalent ion concentrations and used the data to evaluate dos Santos et. al's theory. We found that SCL predictions agree quantitatively with our experimental data.

  3. Effect of substitutional defects on Kambersky damping in L10 magnetic materials

    NASA Astrophysics Data System (ADS)

    Qu, T.; Victora, R. H.

    2015-02-01

    Kambersky damping, representing the loss of magnetic energy from the electrons to the lattice through the spin orbit interaction, is calculated for L10 FePt, FePd, CoPt, and CoPd alloys versus chemical degree of order. When more substitutional defects exist in the alloys, damping is predicted to increase due to the increase of the spin-flip channels allowed by the broken symmetry. It is demonstrated that this corresponds to an enhanced density of states (DOS) at the Fermi level, owing to the rounding of the DOS with loss of long-range order. Both the damping and the DOS of the Co-based alloy are found to be less affected by the disorder. Pd-based alloys are predicted to have lower damping than Pt-based alloys, making them more suitable for high density spintronic applications.

  4. Performance Comparison of InAs, InSb, and GaSb n-Channel Nanowire Metal-Oxide-Semiconductor Field-Effect Transistors in the Ballistic Transport Limit

    NASA Astrophysics Data System (ADS)

    Shimoida, Kenta; Tsuchiya, Hideaki; Kamakura, Yoshinari; Mori, Nobuya; Ogawa, Matsuto

    2013-03-01

    Ballistic performances of InAs, InSb, and GaSb nanowire field-effect transistors (NWFETs) were theoretically investigated. We found that InAs and InSb NWFETs exhibit similar device performances due to 1D band structure effects. Furthermore, although these In-based NWFETs suffer from the density-of-states (DOS) bottleneck, a lower power switching is expected. On the other hand, GaSb NWs have multiple energy subbands at conduction band minima, as a result of the projection of L-valleys which thus improves the DOS. In particular, a <110>-oriented GaSb NW has an improved DOS and a high electron velocity simultaneously, and thus, it could be a strong competitor to In-based NWFETs.

  5. Effect of substitutional defects on Kambersky damping in L1{sub 0} magnetic materials

    SciTech Connect

    Qu, T.; Victora, R. H.

    2015-02-16

    Kambersky damping, representing the loss of magnetic energy from the electrons to the lattice through the spin orbit interaction, is calculated for L1{sub 0} FePt, FePd, CoPt, and CoPd alloys versus chemical degree of order. When more substitutional defects exist in the alloys, damping is predicted to increase due to the increase of the spin-flip channels allowed by the broken symmetry. It is demonstrated that this corresponds to an enhanced density of states (DOS) at the Fermi level, owing to the rounding of the DOS with loss of long-range order. Both the damping and the DOS of the Co-based alloy are found to be less affected by the disorder. Pd-based alloys are predicted to have lower damping than Pt-based alloys, making them more suitable for high density spintronic applications.

  6. Phonon anharmonicity of monoclinic zirconia and yttrium-stabilized zirconia

    NASA Astrophysics Data System (ADS)

    Li, C. W.; Smith, H. L.; Lan, T.; Niedziela, J. L.; Muoz, J. A.; Keith, J. B.; Mauger, L.; Abernathy, D. L.; Fultz, B.

    2015-04-01

    Inelastic neutron scattering measurements on monoclinic zirconia (ZrO2 ) and 8 mol% yttrium-stabilized zirconia were performed at temperatures from 300 to 1373 w K . Temperature-dependent phonon densities of states (DOS) are reported, as are Raman spectra obtained at elevated temperatures. First-principles lattice dynamics calculations with density functional theory gave total and partial phonon DOS curves and mode Grneisen parameters. These mode Grneisen parameters were used to predict the experimental temperature dependence of the phonon DOS with partial success. However, substantial anharmonicity was found at elevated temperatures, especially for phonon modes dominated by the motions of oxygen atoms. Yttrium-stabilized zirconia (YSZ) was somewhat more anharmonic and had a broader phonon spectrum at low temperatures, owing in part to defects in its structure. YSZ also has a larger vibrational entropy than monoclinic zirconia.

  7. NDE evaluation of the intergranular corrosion susceptibility of a 2205 duplex stainless steel using thermoelectric power and double loop electrochemical potentiokinetic reactivation methods

    NASA Astrophysics Data System (ADS)

    Ortiz, N.; Carren, H.; Ruiz, A.

    2013-01-01

    There is a need for a nondestructive technique to assess rapidly and with confidence the degree of sensitization (DOS) in duplex stainless steel (DSS). In this investigation, we present the use of thermoelectric power (TEP) measurements as nondestructive method for the determination of DOS in isothermally aged 2205 DSS at 700C for different aging times. The DOS of the aged samples was first established by performing the double loop electrochemical potentiokinetic reactivation (DL-EPR) test. The microstructural evolution was evaluated by scanning electron microscopy (SEM). Experimental results indicate that TEP coefficient is sensitive to gradual microstructural changes produced by thermal aging and can be used to monitor IGC sensitization of 2205 duplex stainless steel.

  8. Strain-induced pseudo-magnetic fields and charging effects on CVD-grown graphene

    NASA Astrophysics Data System (ADS)

    Wu, R. T.-P.; Teague, M.-L.; Yeh, N.-C.; Yeom, S.; Standley, B. L.; Boyd, D. A.; Bockrath, M. W.

    2011-03-01

    Atomically resolved imaging and spectroscopic characteristics of chemical vapor deposition (CVD) grown graphene on Cu are studied using scanning tunneling microscopy and spectroscopy. CVD-grown graphene remaining on Cu exhibits large ripples and appears strongly strained. Different regions show different lattice structures and electronic density of states (DOS). Ridges appear along the boundaries of different lattice structures, which reveal excess charging effects. The large, non-uniform strain induces pseudo-magnetic fields up to ~ 50 Tesla, yielding integer and fractional quantum Hall effects (IQHE and FQHE) as quantized conductance peaks in the DOS. For CVD-grown graphene transferred from Cu to Si O2 , the average strain and the resulting charging effects and pseudo-magnetic fields are much reduced. Fourier transformation of the local DOS of strained samples as well as data on the effects of real magnetic fields versus pseudo-magnetic fields will be presented. This work was jointly supported by NSF and NRI.

  9. Strong odd-frequency correlations in fully gapped Zeeman-split superconductors.

    PubMed

    Linder, Jacob; Robinson, Jason W A

    2015-01-01

    It is now well established that at a superconductor/ferromagnet (S/F) interface an unconventional superconducting state arises in which the pairing is odd-frequency. The hallmark signature of this superconducting state is generally understood to be an enhancement of the electronic density of states (DoS) at subgap energies close to the S/F interface. However, here we show that an odd frequency state can be present even if the DoS is fully gapped. As an example, we show that this is the case in the pioneering S/FI (where FI is a insulating ferromagnet) tunneling experiments of Meservey and Tedrow, and we derive a generalized analytical criterium to describe the effect of odd-frequency pairing on the DoS. Finally, we propose a simple experiment in which odd-frequency pairing in a Zeeman-split superconductor can be unambiguously detected via the application of an external magnetic field. PMID:26503380

  10. Strong odd-frequency correlations in fully gapped Zeeman-split superconductors

    PubMed Central

    Linder, Jacob; Robinson, Jason W. A.

    2015-01-01

    It is now well established that at a superconductor/ferromagnet (S/F) interface an unconventional superconducting state arises in which the pairing is odd-frequency. The hallmark signature of this superconducting state is generally understood to be an enhancement of the electronic density of states (DoS) at subgap energies close to the S/F interface. However, here we show that an odd frequency state can be present even if the DoS is fully gapped. As an example, we show that this is the case in the pioneering S/FI (where FI is a insulating ferromagnet) tunneling experiments of Meservey and Tedrow, and we derive a generalized analytical criterium to describe the effect of odd-frequency pairing on the DoS. Finally, we propose a simple experiment in which odd-frequency pairing in a Zeeman-split superconductor can be unambiguously detected via the application of an external magnetic field. PMID:26503380

  11. Carbohydrates in diversity-oriented synthesis: challenges and opportunities.

    PubMed

    Lenci, E; Menchi, G; Trabocchi, A

    2016-01-21

    Over the last decade, Diversity-Oriented Synthesis (DOS) has become a new paradigm for developing large collections of structurally diverse small molecules as probes to investigate biological pathways, and to provide a larger array of the chemical space. Drug discovery and chemical biology are taking advantage of DOS approaches to exploit highly-diverse and complex molecular platforms, producing advances in both target and ligand discovery. In this view, carbohydrates are attractive building blocks for DOS libraries, due to their stereochemical diversity and high density of polar functional groups, thus offering many possibilities for chemical manipulation and scaffold decoration. This review will discuss research contributions and perspectives on the application of carbohydrate chemistry to explore the accessible chemical space through appendage, stereochemical and scaffold diversity. PMID:26632306

  12. The importance of metal transverse momentum for silicon contact resistivity

    NASA Astrophysics Data System (ADS)

    Weber, Cory

    2013-11-01

    Contact resistance is becoming an increasing performance limiter as complimentary metal oxide semiconductor devices are scaled. Non-equilibrium Green's function transport simulations are used to evaluate contact resistivity (ρc) to silicon for metals with different density of states (DOS) distributions in k-space and different Si surface orientations. It is shown that the overlap of the metal and silicon DOS in k-space can have orders of magnitude impact to ρc, as this overlap determines whether the low resistivity transverse valleys will conduct. Thus, technologists and materials researchers should search for contact metals with a DOS distribution overlapping the silicon Δ valleys as well metals with low barriers.

  13. Rheological and Magnetorheological Behaviour of Some Magnetic Fluids on Polar and Nonpolar Carrier Liquids

    NASA Astrophysics Data System (ADS)

    Bălău, Oana; Bica, Doina; Koneracka, Martina; Kopčansky, Peter; Susan-Resiga, Daniela; Vékás, Ladislau

    Rheological and magnetorheological behaviour of monolayer and double layer sterically stabilized magnetic fluids, with transformer oil (UTR), diloctilsebacate (DOS), heptanol (Hept), pentanol (Pent) and water (W) as carrier liquids, were investigated. The data for volumic concentration dependence of dynamic viscosity of high colloidal stability UTR, DOS, Hept and Pent samples are particularly well fitted by the formulas given by Vand (1948) and Chow (1994). The Chow type dependence proved its universal character as the viscosity data for dilution series of various magnetic fluids are well fitted by the same curve, regardless the nonpolar or polar charcater of the sample. The magnetorheological effect measured for low and medium concentration water based magnetic fluids is much higher, due to agglomerate formation process, than the corresponding values obtained for the well stabilized UTR, DOS, Hept and Pent samples, even at very high volumic fraction of magnetic nanoparticles.

  14. Study of the electronic and magnetic properties of EuAlO{sub 3} using FP-LAPW method

    SciTech Connect

    Sandeep, Shankar, A.; Rai, D. P.; Thapa, R. K.; Ghimire, M. P.

    2015-05-15

    The electronic and magnetic properties of EuAlO{sub 3} is calculated by first-principles full-potential linearized augmented plane wave (FP-LAPW) method based on density functional theory (DFT). Density of states (DOS), magnetic moments and band structures of the systems are presented. For the exchange and correlation energy, local spin density approximation (LSDA+U) with the inclusion of Hubbard potential U is used. Our calculation showed an indirect band gap of the order of 4 eV for EuAlO{sub 3} in the spin down channel of the DOS and band structures supporting HMF nature of the system. The effective magnetic moment of 6.00 µ{sub B} also supported the above conclusion with an integral value. The DOS of Eu were found responsible for the HMF nature of the system.

  15. Note: A simple broad bandwidth undersampling frequency-domain digital diffuse optical spectroscopy system

    PubMed Central

    Jung, Justin; Istfan, Raeef; Roblyer, Darren

    2014-01-01

    Near-Infrared frequency-domain technologies, such as Diffuse Optical Spectroscopy (DOS), have demonstrated growing potential in a number of clinical applications. The broader dissemination of this technology is limited by the complexity and cost of instrumentation. We present here a simple system constructed with off-the-shelf components that utilizes undersampling for digital frequency-domain dDOS measurements. Broadband RF sweeps (50–300 MHz) were digitally sampled at 25 MSPS; amplitude, phase, and optical property extractions were within 5% of network analyzer derived values. The use of undersampling for broad bandwidth dDOS provides a significant reduction in complexity, power consumption, and cost compared with high-speed ADCs and analog techniques. PMID:25085193

  16. Note: A simple broad bandwidth undersampling frequency-domain digital diffuse optical spectroscopy system.

    PubMed

    Jung, Justin; Istfan, Raeef; Roblyer, Darren

    2014-07-01

    Near-Infrared frequency-domain technologies, such as Diffuse Optical Spectroscopy (DOS), have demonstrated growing potential in a number of clinical applications. The broader dissemination of this technology is limited by the complexity and cost of instrumentation. We present here a simple system constructed with off-the-shelf components that utilizes undersampling for digital frequency-domain dDOS measurements. Broadband RF sweeps (50-300 MHz) were digitally sampled at 25 MSPS; amplitude, phase, and optical property extractions were within 5% of network analyzer derived values. The use of undersampling for broad bandwidth dDOS provides a significant reduction in complexity, power consumption, and cost compared with high-speed ADCs and analog techniques. PMID:25085193

  17. Note: A simple broad bandwidth undersampling frequency-domain digital diffuse optical spectroscopy system

    NASA Astrophysics Data System (ADS)

    Jung, Justin; Istfan, Raeef; Roblyer, Darren

    2014-07-01

    Near-Infrared frequency-domain technologies, such as Diffuse Optical Spectroscopy (DOS), have demonstrated growing potential in a number of clinical applications. The broader dissemination of this technology is limited by the complexity and cost of instrumentation. We present here a simple system constructed with off-the-shelf components that utilizes undersampling for digital frequency-domain dDOS measurements. Broadband RF sweeps (50-300 MHz) were digitally sampled at 25 MSPS; amplitude, phase, and optical property extractions were within 5% of network analyzer derived values. The use of undersampling for broad bandwidth dDOS provides a significant reduction in complexity, power consumption, and cost compared with high-speed ADCs and analog techniques.

  18. Sensor de orvalho/chuva aplicado operao de telescpios

    NASA Astrophysics Data System (ADS)

    Raffaelli, J. C.; Neres, N. L.; Strauss, C.

    2003-08-01

    Foi desenvolvida uma estao meteorolgica para o telescpio robtico Obelix do Observatrio Abraho de Moraes que inclui sensores de temperatura e umidade, alm de um indito sensor de orvalho e chuva que comanda o fechamento automtico da cpula caso haja perigo de condensao. Este sensor composto de uma malha de segmentos metlicos prximos e detecta o aumento da condutividade do ar que precede a condensao. Esse mtodo mais confivel que o critrio de 100% de umidade, que pode causar falsos alarmes devido a impreciso dos sensores de umidade em geral e por no considerar a influncia dos ventos que dificultam a condensao. O trabalho apresenta o mtodo de construo desse sensor e os testes de avaliao. Sugere-se portanto a incluso desse sensor nas estaes meteorolgicas dos telescpios do pas.

  19. The Effect of Low Temperature Sensitization on Corrosion Resistance of Ultrafine-Grained Type 321 Stainless Steels

    NASA Astrophysics Data System (ADS)

    Lv, Jinlong; Luo, Hongyun

    2014-01-01

    The ultrafine grain 321 stainless steel was produced by cold rolling. The microstructure, after 87% cold rolling and annealing at 380 and 450 C, has been characterized using transmission electron microscopy and x-ray diffraction. The degree of sensitization (DOS) was investigated by means of double loop electrochemical potentiokinetic reactivation test. The results showed that the DOS was higher in samples annealed at 380 C than that in samples annealed at 450 C. The strain-induced martensite promoted sensitization at 380 C and the reversion-transformed austenite-restrained sensitization or promoted healing of chromium-depleted zone at 450 C. Although the activation and reactivation current densities in samples sensitized at 450 C were higher than those in samples sensitized at 380 C, higher corrosion resistance of the former was attributed to lower DOS, which was proven further by electrochemical impedance spectroscopy experiment.

  20. Etched distributed Bragg reflectors as three-dimensional photonic crystals: photonic bands and density of states.

    PubMed

    Pavarini, E; Andreani, L C

    2002-09-01

    The photonic band dispersion and density of states (DOS) are calculated for the three-dimensional (3D) hexagonal structure corresponding to a distributed Bragg reflector patterned with a 2D triangular lattice of circular holes. Results for the Si/SiO(2) and GaAs/Al(x)Ga(1-x)As systems determine the optimal parameters for which a gap in the 2D plane occurs and overlaps the 1D gap of the multilayer. The DOS is considerably reduced in correspondence with the overlap of 2D and 1D gaps. Also, the local density of states (i.e., the DOS weighted with the squared electric field at a given point) has strong variations depending on the position. Both results imply substantial changes of spontaneous emission rates and patterns for a local emitter embedded in the structure and make this system attractive for the fabrication of a 3D photonic crystal with controlled radiative properties. PMID:12366275

  1. Significance of decay mechanism into continuum in dynamical Wannier-Stark ladder

    SciTech Connect

    Nemoto, Yuya; Maeshima, Nobuya; Hino, Ken-ichi

    2013-12-04

    We examine the resonance structure of photodressed electron states of laser-driven Wannier-Stark ladder, namely, dynamic Wannier-Stark ladder, in terms of the excess density of states (DOS) closely related to a lifetime of the state of concern. It is revealed that the resonance structure in the strong laser-field region shows clear dependence on the ratio, η, of a Bloch-frequency to a laser frequency. As the laser strength increases, for η = 1, the excess DOS becomes involved with a lot of newly-growing resonance peaks. This result would be understood from the viewpoint of a Fano-like decay-mechanism caused by a multichannel continuum effect, in marked contrast to the cases of larger η’s; for η = 3, the excess DOS just is found to show a pronounced red-shift of a single dominant peak caused by a single-channel continuum effect.

  2. DEZ ANOS DE EXPERINCIA DO COMIT DE TICA EM PESQUISA DA SECRETARIA DE SADE DO DISTRITO FEDERAL, BRASIL

    PubMed Central

    Novaes, Maria Rita C. G.; Guilhem, Dirce; Lolas, Fernando

    2009-01-01

    O objetivo deste artigo relatar a experincia do Comit de tica em Pesquisa da Secretaria de Estado de Sade do Distrito Federal (CEP/SES/DF) Brasil, durante o perodo de 10 anos a partir de sua fundao. Trata-se de uma avaliao descritiva e documental, na modalidade estudo de caso, utilizando-se a totalidade de projetos protocolados no CEP/SES/DF (N 052/08) nesse perodo. As pendncias mais freqentes dos projetos foram: termo de consentimento livre e esclarecido (30%), folha de rosto (25%), metodologia (20%), curriculum vitae (12%), planilha de oramento (9%), outros (4%). O relato das atividades do CEP/SES/DF no perodo de 10 anos revelou, atravs de sua produtividade, a legitimidade do processo de anlise tica dos protocolos visando proteo dos participantes da pesquisa. PMID:19888441

  3. The phonon densities of states of wurtzite AlN and ZrN

    SciTech Connect

    Loong, C.K.

    1995-12-31

    Phonons are thought to play a crucial role in the high thermal conductivity of wide-bandgap semiconductors AlN and ZrN. Using time-of-flight neutron spectroscopy, we have measured the phonon spectra of AIN and ZrN up to 300 MeV (2400 cm{sup {minus}1}). The one-phonon density of states (DOS) of AIN exhibits relatively sharp bands at about 033, 63, 83 and 91 MeV. In addition, distinct multiple-phonon excitations were observed at {approximately}173 and 255 MeV. The phonon DOS of ZrN displays similar features with the corresponding phonon energies shifted toward lower energies. The measured DOS of AlN is compared with results of molecular-dynamics simulations.

  4. NMR study of Nb-deficient effect in NbB2

    NASA Astrophysics Data System (ADS)

    Su, T. H.; Lue, C. S.

    2007-03-01

    Observations of the Nb-deficiency enhanced superconducting temperature (TC) in NbB2 have been reported. In order to provide experimental information for this effect, we have carried out the nuclear magnetic resonance (NMR) study of Nb1-xB2 (x = 0, 0.13, 0.20, and 0.26) in the normal state. From both ^11B and ^93Nb NMR spin-lattice relaxation rates, we can deduce the B-2p and Nb-3d partial Fermi-level density of states (DOS) for each individual composition. The result indicates that the B-2p and Nb-3d partial Fermi-level DOS increase with Nb deficient level. Such a tendency is consistent with the trend of the superconducting temperature, revealing that the observed TC enhancement is strongly correlated to the increase of the Fermi-level DOS induced by the Nb deficiency.

  5. Insights into redox sensing metalloproteins in Mycobacterium tuberculosis

    PubMed Central

    Chim, Nicholas; Johnson, Parker M.; Goulding, Celia W.

    2014-01-01

    Mycobacterium tuberculosis, the pathogen that causes tuberculosis, has evolved sophisticated mechanisms for evading assault by the human host. This review focuses on M. tuberculosis regulatory metalloproteins that are sensitive to exogenous stresses attributed to changes in the levels of gaseous molecules (i.e., molecular oxygen, carbon monoxide and nitric oxide) to elicit an intracellular response. In particular, we highlight recent developments on the subfamily of Whi proteins, redox sensing WhiB-like proteins that contain iron-sulfur clusters, sigma factors and their cognate anti-sigma factors of which some are zinc-regulated, and the dormany survival regulon DosS/DosT-DosR heme sensory system. Mounting experimental evidence suggests that these systems contribute to a highly complex and interrelated regulatory network that controls M. tuberculosis biology. This review concludes with a discussion of strategies M. tuberculosis has developed to maintain redox homeostasis, including mechanisms to regulate endogenous nitric oxide and carbon monoxide levels. PMID:24314844

  6. Effect of In Vitro Maturation Technique and Alpha Lipoic Acid Supplementation on Oocyte Maturation Rate: Focus on Oxidative Status of Oocytes

    PubMed Central

    Zavareh, Saeed; Karimi, Isaac; Salehnia, Mojdeh; Rahnama, Ali

    2016-01-01

    Background Therapeutic potential of in vitro maturation (IVM) in infertility is growing with great promise. Although significant progress is obtained in recent years, existing IVM protocols are far from favorable results. The first aim of this study was to investigate whether two step IVM manner change reactive oxygen species (ROS) and total anti- oxidant capacity (TAC) levels. The second aim was to find the effect of alpha lipoic acid (ALA) supplementation on oocyte maturation rate and on ROS/TAC levels during IVM. Materials and Methods In this experimental study, mouse germinal vesicle (GV) oocytes divided into cumulus denuded oocytes (DOs) and cumulus oocyte complexes (COCs) groups. GVs were matured in vitro in the presence or absence of ALA only for 18 hours (control) or with pre-culture of forskolin plus cilostamide for an additional 18 hours. Matured oocytes obtained following 18 and 36 hours based on experimental design. In parallel, the ROS and TAC levels were measured at different time (0, 18 and 36 hours) by 2',7'-dichlorodihydrofluorescein (DCFH) probe and ferric reducing/antioxidant power (FRAP) assay, respectively. Results Maturation rate of COCs was significantly higher than DOs in control group (P<0.05), while there was no significant difference between COCs and DOs when were pre-cultured with forskolin plus cilostamide. ROS and TAC levels was increased and decreased respectively in DOs after 18 hours while in COCs did not change at 18 hours and showed a significant increase and decrease respectively at 36 hours (P<0.05). ROS and TAC levels in the presence of ALA were significantly decreased and increased respectively after 36 hours (P<0.05) whereas, maturation rates of COCs and DOs were similar to their corresponding control groups. Conclusion ALA decreased ROS and increased TAC but could not affect maturation rate of both COCs and DOs in one or two step IVM manner. PMID:26985332

  7. Discrete density of states

    NASA Astrophysics Data System (ADS)

    Aydin, Alhun; Sisman, Altug

    2016-03-01

    By considering the quantum-mechanically minimum allowable energy interval, we exactly count number of states (NOS) and introduce discrete density of states (DOS) concept for a particle in a box for various dimensions. Expressions for bounded and unbounded continua are analytically recovered from discrete ones. Even though substantial fluctuations prevail in discrete DOS, they're almost completely flattened out after summation or integration operation. It's seen that relative errors of analytical expressions of bounded/unbounded continua rapidly decrease for high NOS values (weak confinement or high energy conditions), while the proposed analytical expressions based on Weyl's conjecture always preserve their lower error characteristic.

  8. The discovery of antibacterial agents using diversity-oriented synthesis.

    PubMed

    Galloway, Warren R J D; Bender, Andreas; Welch, Martin; Spring, David R

    2009-05-14

    The emergence and increasing prevalence of multi-drug resistance bacterial strains represents a clear and present danger to the standard of human healthcare as we know it. The systematic study of modulating biological systems using small molecules (so-called chemical genetics) offers a potentially fruitful means of discovering critically needed new antibacterial agents. Crucial to the success of this approach is the ready availability of functionally diverse small molecule collections. In this feature article we focus upon the use of a diversity-oriented synthesis (DOS) approach for the efficient generation of such compound collections, and discuss the utility of DOS for the discovery of new antibacterial agents. PMID:19532856

  9. Observation of rebirth of metallic paths during resistance switching of metal nanowire

    NASA Astrophysics Data System (ADS)

    Horiba, K.; Fujiwara, K.; Nagamura, N.; Toyoda, S.; Kumigashira, H.; Oshima, M.; Takagi, H.

    2013-11-01

    To clarify the mechanism of resistance-switching phenomena, we have investigated the change in the electronic structure of a Ni nanowire device during resistance-switching operations using scanning photoelectron microscopy techniques. We directly observed the disappearance of density of state (DOS) at the Fermi level (EF) in a high-resistance state and recovery of a finite DOS at EF in a low-resistance state. These results are direct evidence that the Ni nanowire is fully oxidized after switching to the high-resistance state and that Ni-metal conductive paths in the oxidized nanowire are recovered in the low-resistance state.

  10. In-Vivo Gene Signatures of Mycobacterium tuberculosis in C3HeB/FeJ Mice

    PubMed Central

    Gautam, Uma Shankar; Mehra, Smriti; Kaushal, Deepak

    2015-01-01

    Despite considerable progress in understanding the pathogenesis of Mycobacterium tuberculosis (Mtb), development of new therapeutics and vaccines against it has proven difficult. This is at least in part due to the use of less than optimal models of in-vivo Mtb infection, which has precluded a study of the physiology of the pathogen in niches where it actually persists. C3HeB/FeJ (Kramnik) mice develop human-like lesions when experimentally infected with Mtb and thus make available, a faithful and highly tractable system to study the physiology of the pathogen in-vivo. We compared the transcriptomics of Mtb and various mutants in the DosR (DevR) regulon derived from Kramnik mouse granulomas to those cultured in-vitro. We recently showed that mutant ΔdosS is attenuated in C3HeB/FeJ mice. Aerosol exposure of mice with the mutant mycobacteria resulted in a substantially different and a relatively weaker transcriptional response (< = 20 genes were induced) for the functional category ‘Information Pathways’ in Mtb:ΔdosR; ‘Lipid Metabolism’ in Mtb:ΔdosT; ‘Virulence, Detoxification, Adaptation’ in both Mtb:ΔdosR and Mtb:ΔdosT; and ‘PE/PPE’ family in all mutant strains compare to wild-type Mtb H37Rv, suggesting that the inability to induce DosR functions to different levels can modulate the interaction of the pathogen with the host. The Mtb genes expressed during growth in C3HeB/FeJ mice appear to reflect adaptation to differential nutrient utilization for survival in mouse lungs. The genes such as glnB, Rv0744c, Rv3281, sdhD/B, mce4A, dctA etc. downregulated in mutant ΔdosS indicate their requirement for bacterial growth and flow of carbon/energy source from host cells. We conclude that genes expressed in Mtb during in-vivo chronic phase of infection in Kramnik mice mainly contribute to growth, cell wall processes, lipid metabolism, and virulence. PMID:26270051

  11. Probing the Electronic Density of States of Germanium Nanoparticles: A Method for Determining Atomic Structure

    SciTech Connect

    Williamson, A; Bostedt, C; van Buuren, T; Willey, T; Terminello, L; Galli, G; Pizzagalli, L

    2004-03-31

    We present first principles electronic structure calculations and photoemission measurements of the change in the valence band DOS of germanium as its dimensions are reduced from the bulk to the nanoscale. By comparing the calculated broadening of the s and s--p band peaks and the energy of surface dangling bonds to the measured DOS we identify the most likely structure of these nanoparticles. We propose that, in contrast to recent interpretations, small 2-3 nm germanium nanoparticles prepared by gas phase aggregation have a distorted diamond structure core and a thermally disordered surface.

  12. Estudio de los Efectos Gravitomagnticos en Cuerpos Masivos Rotantes

    NASA Astrophysics Data System (ADS)

    Velandia Heredia, N.; Tejeiro, J. M.

    2008-03-01

    A partir del estudio de los Efectos Gravitomagnticos en cuerpos masivos rotantes, planteamos la expresin para medir el desfase en el tiempo, para diferentes observadores, que se dan cuando viajan dos rayos de luz por una gua de onda o de manera libre (geodsicas), en el plano azimutal y en el plano polar. Con lo anterior queremos abordar el experimento tipo Michelson y Morley, de forma que podamos involucrar el valor de la densidad del momento angular (a) en el retraso temporal para los dos haces de luz que viajan por los brazos del interfermetro, cuando este ltimo es ubicado en el plano ecuatorial.

  13. Factorial validity of the death obsession scale in African University students.

    PubMed

    Mashegoane, Solomon; Makhubela, Malose S

    2016-01-01

    In this study the factor structure of the Death Obsession Scale (DOS) was examined using confirmatory factor analysis. Data used consisted of DOS reports of 328 Black African students. Confirmatory factor analysis revealed that two- and three-factor models obtained among female and male African students, respectively, provided the best fit to the data. The two factors in female African students were Death Rumination and Apprehension, and the three factors of their male counterparts were Death Ruminations, Apprehension, and Comprehensibility of Death. Factor intercorrelations did not resolve the dimensionality issue of the measure, leading to the conclusion that the factors must be investigated further. PMID:26073522

  14. Temperature Dependence of the Phonon Entropy of Vanadium

    SciTech Connect

    Bogdanoff, P. D.; Fultz, B.; Robertson, Lee; Crow, Lowell

    2002-01-01

    The phonon density-of-states (DOS) of elemental vanadium was measured at elevated temperatures by inelastic neutron scattering. The phonon softening predicted by thermal expansion against the bulk modulus is much larger than the measured shifts in phonon energies. We conclude that the phonon anharmonicities associated with thermal expansion are largely canceled by effects from phonon-phonon scattering. Prior measurements of the heat capacity and calculations of the electronic entropy of vanadium are assessed, and consistency requires an explicit temperature dependence of the phonon DOS. Using data from the literature, similar results are found for chromium, niobium, titanium, and zirconium.

  15. Molecular Library Synthesis Using Complex Substrates: Expanding the Framework of Triterpenoids

    PubMed Central

    Ignatenko, Vasily A.; Han, Yong; Tochtrop, Gregory P.

    2013-01-01

    The remodelling of a natural product core framework by means of diversity-oriented synthesis (DOS) is a valuable approach to access diverse/biologically relevant chemical space and to overcome the limitations of combinatorial-type compounds. Here we provide proof of principle and a thorough conformational analysis for a general strategy whereby the inherent complexity of a starting material is used to define the regio- and stereochemical outcomes of reactions in chemical library construction. This is in contrast to the traditional DOS logic employing reaction development and catalysis to drive library diversity PMID:23245400

  16. A photoelectron spectroscopy study of the electronic structure evolution in CuInSe{sub 2}-related compounds at changing copper content

    SciTech Connect

    Kuznetsova, T. V.; Grebennikov, V. I.; Zhao, H.; Derks, C.; Taubitz, C.; Neumann, M.; Persson, C.; Kuznetsov, M. V.; Bodnar, I. V.; Martin, R. W.; Yakushev, M. V.

    2012-09-10

    Evolution of the valence-band structure at gradually increasing copper content has been analysed by x-ray photoelectron spectroscopy (XPS) in In{sub 2}Se{sub 3}, CuIn{sub 5}Se{sub 8}, CuIn{sub 3}Se{sub 5}, and CuInSe{sub 2} single crystals. A comparison of these spectra with calculated total and angular-momentum resolved density-of-states (DOS) revealed the main trends of this evolution. The formation of the theoretically predicted gap between the bonding and non-bonding states has been observed in both experimental XPS spectra and theoretical DOS.

  17. High-Resolution Soft X-Ray Spectral Analysis in the CK Region of Titanium Carbide (TiC) using the DV-X alpha Molecular Orbital Method

    SciTech Connect

    Shimomura, Kenta; Muramatsu, Yasuji; Denlinger, Jonathan D.; Gullikson, Eric M.

    2008-10-31

    We used the DV-X alpha method to analyze the high-resolution soft X-ray emission and absorption spectra in the CK region of titanium carbide (TiC). The spectral profiles of the X-ray emission and absorption can be ssuscfucelly reproduced by the occupied and unoccupied density of states (DOS ), respectively, in the C2p orbitals of the center carbon atoms in a Ti62C63 cluster model, suggesting that the center carbon atom in a large cluster model expanded to the cubic-structured 53 (= 125) atoms provides sufficient DOS for the X-ray spectral analysis of rock-salt structured metal carbides.

  18. Observation of rebirth of metallic paths during resistance switching of metal nanowire

    SciTech Connect

    Horiba, K. Nagamura, N.; Toyoda, S.; Oshima, M.; Synchrotron Radiation Research Organization, The University of Tokyo, Tokyo 113-8656 ; Fujiwara, K.; Takagi, H.; Kumigashira, H.; Precursory Research for Embryonic Science and Technology , Japan Science and Technology Agency , Saitama 332-0012

    2013-11-04

    To clarify the mechanism of resistance-switching phenomena, we have investigated the change in the electronic structure of a Ni nanowire device during resistance-switching operations using scanning photoelectron microscopy techniques. We directly observed the disappearance of density of state (DOS) at the Fermi level (E{sub F}) in a high-resistance state and recovery of a finite DOS at E{sub F} in a low-resistance state. These results are direct evidence that the Ni nanowire is fully oxidized after switching to the high-resistance state and that Ni-metal conductive paths in the oxidized nanowire are recovered in the low-resistance state.

  19. Combination of broadband diffuse optical spectroscopy with magnetic resonance imaging

    NASA Astrophysics Data System (ADS)

    Merritt, Sean Isaiah

    Broadband diffuse optical spectroscopy (DOS) is an emerging optical technique used to measure absorption and scattering of bulk tissue non-invasively within the near-infrared (600--1050 nm). The ultimate aim of my advisors group is for broadband DOS to become an established medical diagnostic technique used clinically on various tissue types including breast, muscle and bone. The specific goal for my research is to use established magnetic resonance (MR) techniques for the purpose of continued development and validation of broadband DOS. The initial studies carried out were a validation of broadband DOS through a direct comparison with MRI. Both techniques are sensitive to signals produced by water and lipids in tissue. There is also sensitivity to blood flow, which MRI measures using exogenous contrast agents and broadband DOS is sensitive through measurement of total hemoglobin content (THC) and tissue oxygen saturation (StO2). These validation studies were compared initially in a rat tumor model in which both techniques were used simultaneously. A qualitative correlation was found between the MR images of water content and blood perfusion compared with the DOS water and THC values. A more quantitative comparison was made between measuring absolute water and lipid content in phantoms and in human tissue, which showed a strong correlation. The in vivo study also validated that broadband DOS was interrogating bone marrow in the tibia. The second half of this thesis is focused on developing new capabilities of broadband DOS and the MRI literature is used as a guide. When a water molecule hydrogen bonds to another molecule, the absorption spectrum in the near-infrared which is due to the vibrational overtone of the OH bond will change. The expected changes were observed in tissue and an algorithm was developed to fit for a tissue bound water parameter. Also, as tissue temperature changes, the fraction of water bound to other water molecules changes and can be used to fit for deep tissue temperature. Preliminary validation of these two techniques is carried out and there appears to be great potential for these methods.

  20. Dependence of mobility on density of gap states in organics by GAMEaS-gate modulated activation energy spectroscopy

    NASA Astrophysics Data System (ADS)

    So, Woo-young; Lang, David V.; Butko, Vladimir Y.; Chi, Xiaoliu; Lashley, Jason C.; Ramirez, Arthur P.

    2008-09-01

    We develop a broadly applicable transport-based technique, gate modulated activation energy spectroscopy (GAMEaS), for determining the density of states (DOS) in an energy gap. GAMEaS is applied to field-effect transistors (FETs) made from different single crystal oligomer semiconductors. We find that there are two distinct types of band tails, deep and shallow, depending on the crystallization process. The exponential band tails of the localized DOS are characterized by their slope with the highest mobility FETs having a value of 29 eV-1 close to 1/kBT at 300 K.

  1. Kondo effect in a semiconductor quantum dot with a spin-accumulated lead.

    PubMed

    Kobayashi, T; Tsuruta, S; Sasaki, S; Fujisawa, T; Tokura, Y; Akazaki, T

    2010-01-22

    We study the Kondo effect in a semiconductor quantum dot in contact with a spin-accumulated lead. The spin accmulation in a nonmagnetic semiconductor is realized by spin injection from a spin-polarized quantum point contact in combination with magnetic focusing, thus creating spin-unbalanced chemical potentials. We demonstrate that the spin splitting of the Kondo densities of states (DOS) for spin-up and spin-down electrons can be controlled by selectively shifting only the spin-up DOS using spin accumulation. We also show the possibility to recover the Kondo effect in a high magnetic field, by compensating for Zeeman splitting by spin accumulation. PMID:20366670

  2. Understanding the applicability and limitations of Wang-Landau method for biomolecules: Met-enkephalin and Trp-cage

    NASA Astrophysics Data System (ADS)

    Singh, Priya; Sarkar, Subir K.; Bandyopadhyay, Pradipta

    2011-10-01

    Wang-Landau (WL) method is an efficient way to calculate density of states (DOS), thermodynamic and structural properties of a system. In this work, two different flavors of WL method, its original implementation and the t-1 method of Belardinelli et al., are applied to met-enkephalin and Trp-cage to understand their efficacy and limitations. Accurate thermodynamic and structural quantities are calculated for both the peptides considered. For Trp-cage, fragmenting the energy range into different parts and determining DOS for each part is found to be a feasible way to use WL method. The problem of low temperature sampling of WL method is discussed.

  3. 48 CFR 609.406-3 - Procedures.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... statement from each DOS organizational element affected by the debarment action as to the impact of a... presentation shall be conducted informally and a transcript need not be made. However, the contractor may supplement its oral presentation with written information and arguments for inclusion in the...

  4. SAGE 2.0 SOLVENT ALTERNATIVES GUIDE - USER'S GUIDE

    EPA Science Inventory

    The guide provides instruction for using the SAGE (Solvent Alternatives Guide) software system, version 2.O. It assumes that the user is familiar with the fundamentals of operating a personal computer under the Microsoft disk operating system (MS-DOS). AGE recommends solvent repl...

  5. SAGE 2.0 - SOLVENT ALTERNATIVES GUIDES - USER'S GUIDE

    EPA Science Inventory

    The guide provides instruction for using the SAGE (Solvent Alternatives Guide) software system, version 2.O. It assumes that the user is familiar with the fundamentals of operating a personal computer under the Microsoft disk operating system (MS-DOS). AGE recommends solvent repl...

  6. SAGE FOR WINDOWS (WSAGE) VERSION 1.0 SOLVENT ALTERNATIVES GUIDE - USER'S GUIDE

    EPA Science Inventory

    The guide provides instructions for using the Solvent Alternatives Guide (SAGE) for Windows, version 1.0. The guide assumes that the user is familiar with the fundamentals of operating Windows 3.1 (or higher) on a personal computer under the DOS 5.0 (or higher) operating system. ...

  7. Computer Series, 89.

    ERIC Educational Resources Information Center

    Moore, John W., Ed.

    1988-01-01

    Describes five computer software packages; four for MS-DOS Systems and one for Apple II. Included are SPEC20, an interactive simulation of a Bausch and Lomb Spectronic-20; a database for laboratory chemicals and programs for visualizing Boltzmann-like distributions, orbital plot for the hydrogen atom and molecular orbital theory. (CW)

  8. Information Release Administration Database (IRAD), Software Design Description (SDD)

    SciTech Connect

    CAREY, D.S.

    2000-05-10

    The IRAD system is a client server system that is written in Paradox for DOS. This system will be replaced with a Visual Basic and SQL Server in order to update the technology, eliminate obsolete functions, as well as to automate the manual interfaces.

  9. The Association between Deans of Students' Attitudes toward Suicide and Their Bases of Power

    ERIC Educational Resources Information Center

    Majewski, Diane J.

    2010-01-01

    This study investigated the associations between attitudes toward suicide and bases of power in university administrators known as Deans of Students (DOS). The National Association for Student Personnel Administrators, the professional association of higher education administrators in student affairs, provided the survey population for this study.…

  10. COATING ALTERNATIVES GUIDE (CAGE) USER'S GUIDE

    EPA Science Inventory

    The guide provides instructions for using the Coating Alternatives GuidE (CAGE) software program, version 1.0. It assumes that the user is familiar with the fundamentals of operating an IBM-compatible personal computer (PC) under the Microsoft disk operating system (MS-DOS). CAGE...

  11. Computer Series 41: Potential-Energy Surfaces and Transition-State Theory.

    ERIC Educational Resources Information Center

    Moss, S. J.; Coady, C. J.

    1983-01-01

    Describes computer programs involving the London-Eyring-Polany-Sato method (LEPS). The programs provide a valuable means of introducing students to potential energy surfaces and to the foundations of transition state theory. Program listings (with copies of student scripts) or programs on DOS 3.3 disc are available from authors. (JN)

  12. Publicacin de Propuesta Presupuestaria del NCI para el Ao Fiscal 2017

    Cancer.gov

    Ayer, tuve el honor de presentar al Presidente Barack Obama el Plan Anual del NCI y Propuesta Presupuestaria para el Ao Fiscal 2017. Creo que la Propuesta Presupuestaria, como se conoce ahora, es especialmente importante este ao para la investigacin oncolgica por dos razones.

  13. Unmasking Determinants of Specificity in the Human Kinome

    PubMed Central

    Creixell, Pau; Palmeri, Antonio; Miller, Chad J.; Lou, Hua Jane; Santini, Cristina C.; Nielsen, Morten; Turk, Benjamin E.; Linding, Rune

    2015-01-01

    Summary Protein kinases control cellular responses to environmental cues by swift and accurate signal processing. Breakdowns in this high-fidelity capability are a driving force in cancer and other diseases. Thus, our limited understanding of which amino acids in the kinase domain encode substrate specificity, the so-called determinants of specificity (DoS), constitutes a major obstacle in cancer signaling. Here, we systematically discover several DoS and experimentally validate three of them, named the αC1, αC3, and APE-7 residues. We demonstrate that DoS form sparse networks of non-conserved residues spanning distant regions. Our results reveal a likely role for inter-residue allostery in specificity and an evolutionary decoupling of kinase activity and specificity, which appear loaded on independent groups of residues. Finally, we uncover similar properties driving SH2 domain specificity and demonstrate how the identification of DoS can be utilized to elucidate a greater understanding of the role of signaling networks in cancer (Creixell et al., 2015 [this issue of Cell]). PMID:26388442

  14. Quick Overview Scout 2008 Version 1.0

    EPA Science Inventory

    The Scout 2008 version 1.0 statistical software package has been updated from past DOS and Windows versions to provide classical and robust univariate and multivariate graphical and statistical methods that are not typically available in commercial or freeware statistical softwar...

  15. A Utilizao da Astronomia como Tema Interdisciplinar e Aplicaes de Objetos de Aprendizagem

    NASA Astrophysics Data System (ADS)

    da Silva, L. A.; Voelzke, M. R.

    2008-09-01

    Este trabalho visa analisar a possibilidade de relacionar contedos aplicados no ensino fundamental e mdio de forma interdisciplinar por intermdio da astronomia, com a interveno de objetos de aprendizagem que possam integrar as disciplinas e a utilizao de recursos tecnolgicos. Em uma pesquisa prvia com 20 professores de uma escola estadual situada na cidade de Guarulhos foi observado que apenas 25% dos professores utilizam algum recurso tecnolgico para o desenvolvimento de contedos pertinentes sua disciplina, tais como sites e softwares educativos, sendo que a maioria absoluta continua ensinando apenas com livros didticos. A maior parte dos professores apresenta dificuldades em trabalhar sua disciplina de forma interdisciplinar, ou seja, 75% dos professores preferem aplicar os contedos seguindo uma hierarquia linear de tpicos, evitando a discusso de temas que de alguma forma esto relacionados. A astronomia pode vir fascinar o ser humano e despertar sua curiosidade promovendo um maior interesse no aprendizado, podendo favorecer anlises interdisciplinares de forma lgica e objetiva, desta forma colocar a astronomia como tema motivador interdisciplinar, pode ser relevante no que se refere ao distanciamento da fragmentao dos contedos. No Estado de So Paulo, a implantao da proposta curricular no ensino fundamental e mdio mostra claramente a insero da astronomia na maior parte das sries, principalmente na 6ª srie em que todo o bimestre se fala de astronomia.

  16. Good Research and Faculty Buy-in: 2 Keys to Effective Marketing

    ERIC Educational Resources Information Center

    Blumenstyk, Goldie

    2008-01-01

    Effective marketing requires more than a sleek new logo. This article presents excerpts of an online discussion on the dos and don'ts of college marketing with Mary R. Stagaman, associate vice president for external relations at the University of Cincinnati. In this discussion, she noted that good research and faculty buy-in are the two keys to

  17. TREATMENT WETLAND HABITAT AND WILDLIFE USE ASSESSMENT AND NORTH AMERICAN TREATMENT WETLAND DATABASE V 2.0

    EPA Science Inventory

    The USEPA sponsored a project to collect and catalog information from wastewater treatment wetlands into a computer database. EPA has also written a user friendly, stand-alone, menu-driven computer program to allow anyone with DOS 3.3 or higher to access the information in the da...

  18. Effective Patient-Physician Communication Based on Osteopathic Philosophy in Caring for Elderly Patients.

    PubMed

    Noll, Donald R; Ginsberg, Terrie; Elahi, Abdul; Cavalieri, Thomas A

    2016-01-01

    The objective of this article is to discuss effective communication strategies between elderly patients and their physicians from the perspective of osteopathic heritage. The patient-physician communication styles of Andrew Taylor Still, MD, DO, and early osteopathic physicians (ie, DOs) may have influenced how DOs today communicate with their patients. Historical literature describes how Still would discuss with his patients the causes of their health problems using analogies and language they would understand, and how, when caring for a patient at the end of life, he empathically provided emotional support for both patients and their families. Early DOs advocated setting clear expectations for patients regarding clinical outcomes and carefully listening to patients to build trust. The Osteopathic Oath, which calls for the DO to view the patient as a friend, may also affect patient-physician communication. Early osteopathic philosophy and culture, as modeled by Dr Still in his approach to elderly patients, should inspire today's DOs in their communication with their elderly patients. PMID:26745563

  19. 8 CFR 212.6 - Border crossing identification cards.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... Application, to obtain a Form DSP-150 in accordance with the applicable DOS regulations at 22 CFR 41.32 and/or... 22 CFR 41.122, a Form DSP-150 or combined B-1/B-2 visitor visa and non-biometric border crossing... expedited removal in accordance with 8 CFR part 235, the applicant shall be advised in writing that he...

  20. 8 CFR 1212.6 - Border crossing identification cards.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... with the applicable DOS regulations at 22 CFR 41.32 and/or instructions. (b) Use—(1) Application for... expiration of the validity of the form—(1) At a POE. (i) In accordance with 22 CFR 41.122, a Form DSP-150 or... with 8 CFR part 235, the applicant shall be advised in writing that he or she may request a...

  1. Can We Really Make a Difference? Exploring Pre-Service Teachers' Experience with Socio-Scientific Issues Aiming for Democratic Participation in Science

    ERIC Educational Resources Information Center

    Cook, Kristin Leigh

    2012-01-01

    Responding to calls for an empirical glimpse into a socioscientific issues (SSI)-based curriculum that aims to promote democratic participation, enhance students' connections to science, and empower students for the betterment of society (Dos Santos, 2008; Sadler, Barab, & Scott, 2007; Tal & Kedmi, 2006; Fusco & Barton, 2001; Hodson, 2003), this

  2. 75 FR 5685 - Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-135BJ...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-02-04

    ... to the specified products. That NPRM was published in the Federal Register on July 30, 2009 (74 FR... Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); and 3. Will not have a significant... Section (PC 060), Av. Brigadeiro Faria Lima, 2170-- Putim--12227-901 S o Jose dos...

  3. 76 FR 52220 - Airworthiness Directives; Embraer-Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-500...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-08-22

    ... the specified products. That NPRM was published in the Federal Register on May 10, 2011 (76 FR 26959... Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); and (3) Will not have a significant... dos Campos--SP, CEP: 12227-901--PO Box: 36/2, BRASIL; telephone: ++55 12 3927-5383; fax: ++55 12...

  4. 75 FR 31332 - Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-120, -120ER...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-06-03

    ... rule'' under the DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); and 3. Will... Jose dos Campos--SP--BRASIL; telephone: +55 12 3927-5852 or +55 12 3309-0732; fax: +55 12 3927-7546;...

  5. 75 FR 7998 - Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-135 and -145...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-02-23

    ..., which was published in the Federal Register on August 19, 2009 (74 FR 41810). That earlier NPRM proposed... rule'' under the DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); and 3. Will..., 2170--Putim-- 12227-901 S o Jose dos Campos--SP--BRASIL; telephone: +55 12 3927-5852 or +55 12...

  6. 75 FR 27403 - Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-135 and -145...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-05-17

    ... specified products. That supplemental NPRM was published in the Federal Register on February 23, 2010 (75 FR...'' under the DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); and 3. Will not have...--12227-901 S o Jose dos Campos--SP--BRASIL; telephone: +55 12 3927-5852 or +55 12 3309-0732; fax: +55...

  7. 75 FR 19193 - Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model ERJ 170 and ERJ...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-14

    ... specified products. That supplemental NPRM was published in the Federal Register on June 26, 2008 (73 FR...'' under the DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); and 3. Will not have.... Brigadeiro Faria Lima, 2170-- Putim--12227-901 S o Jose dos Campos--SP--BRASIL; telephone: +55 12...

  8. 76 FR 37244 - Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-120, -120ER...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-06-27

    ... Register on June 3, 2010 (75 FR 31332). That NPRM proposed to correct an unsafe condition for the specified... ``significant rule'' under the DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); and 3.... Brigadeiro Faria Lima, 2170-- Putim--12227-901 S o Jose dos Campos--SP--BRASIL; telephone +55 12 3927-5852...

  9. 76 FR 55783 - Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model ERJ 190 Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-09-09

    ... (76 FR 13539). That NPRM proposed to correct an unsafe condition for the specified products. The MCAI... Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); and 3. Will not have a significant... Section (PC 060), Av. Brigadeiro Faria Lima, 2170-- Putim--12227-901 S o Jose dos...

  10. 75 FR 34357 - Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-135ER...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-06-17

    ... February 25, 2010 (75 FR 8557). That NPRM proposed to correct an unsafe condition for the specified... Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); and 3. Will not have a significant..., 2170-- Putim--12227-901 S o Jose dos Campos--SP--BRASIL; telephone: +55 12 3927-5852 or +55 12...

  11. 77 FR 72430 - Application for a Presidential Permit To Operate and Maintain Pipeline Facilities on the Border...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-05

    .... SUMMARY: Notice is hereby given that the Department of State (DOS) received an application from Plains LPG Services, L.P. (Plains LPG) to operate and maintain facilities it has acquired pertaining to six pipelines... Permits. Plains LPG requests issuance of a new permit reflecting sole ownership of the St. Clair...

  12. The ab initio calculations of the doping Zr's influence on the electronic structure of AlCo2Ti

    NASA Astrophysics Data System (ADS)

    Fu, Hongzhi; Peng, Feng; Cheng, Dong; Gao, Tao; Cheng, Xinlu; Yang, Xiangdong

    2007-08-01

    The electronic structures of the ternary (Hume Rothery) L21-phase compound AlCo2Ti are calculated by first-principles using full potential linearized augmented plane wave (FLAPW) method with the generalized gradient approximation (GGA). The ab initio results are analyzed with a simplified model for Al-based compounds containing transition metal (TM) atoms. The results show that the total DOS depends strongly on the positions of TM atoms, and the TM d DOS plays a crucial role in hybridization with other element valence electrons. However, the Al 3s states are repelled far away from the Fermi energy in studied sample, and the Al 3d states are far more extended-like in the character than the d states. Furthermore, the total DOSs are modulated by Al 3p states and the Al 3p states are more sensitive than d states to change in the electronic interactions. Then, the Al 3p is also important for the ternary stability of the intermetallic compound. The Co Ti interaction becomes stronger by the doping element Zr in the Al4Co8Ti3Zr structure. Especially, the doping Al4Co8Ti3Zr alloy has a larger value DOS at the Fermi level and makes the total DOS gap smaller than the AlCo2Ti.

  13. Combinación de radioterapia con quimioterapia mejora la supervivencia con raro cáncer cerebral

    Cancer.gov

    Los resultados de dos estudios clínicos de seguimiento a largo plazo confirman que ciertos pacientes viven substancialmente más si se les trata con una combinación de quimioterapia y radioterapia en comparación con radioterapia solamente.

  14. DEVELOPMENT OF AN ENZYME-LINKED IMMUNOSORBENT ASSAY (ELISA) FOR THE MEASUREMENT OF PLASMA GROWTH HORMONE (GH) LEVELS IN CHANNEL CATFISH: ASSESSMENT OF ENVIRONMENTAL SALINITY AND GH SECRETAGOGUES ON PLASMA GH LEVELS

    Technology Transfer Automated Retrieval System (TEKTRAN)

    We report the development of a sensitive, and specific, competitive, antigen-capture enzyme-linked immunosorbent assay (ELISA) for the measurement of channel catfish growth hormone (cfGH). The detection limit of the assay was 2.0 ng/ml. Recovery of cfGH-spiked plasma samples averaged 102%, and dos...

  15. Tools of the Courseware Trade: A Comparison of ToolBook 1.0 and HyperCard 2.0.

    ERIC Educational Resources Information Center

    Brader, Lorinda L.

    1990-01-01

    Compares two authoring tools that were developed to enable users without programing experience to create and modify software. HyperCard, designed for Macintosh microcomputers, and ToolBook, for microcomputers that run on MS-DOS, are compared in the areas of programing languages, graphics and printing capabilities, user interface, system

  16. 77 FR 67055 - Application for a Presidential Permit To Operate and Maintain Pipeline Facilities on the Border...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-11-08

    .... SUMMARY: Notice is hereby given that the Department of State (DOS) has received from NOVA Chemicals Inc. (``NOVA Inc.'') notice that by way of corporate succession, NOVA Inc. now owns, operates, and maintains.... (``Polysar'') and permitted under a 1986 Presidential Permit issued to Polysar. NOVA Inc. requests a...

  17. 77 FR 67056 - Application for a Presidential Permit To Operate and Maintain Pipeline Facilities on the Border...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-11-08

    .... SUMMARY: Notice is hereby given that the Department of State (DOS) has received from NOVA Chemicals Inc. (``NOVA Inc.'') an application for re-instatement of a Presidential Permit authorizing the operation and... United States and Canada. NOVA Inc. is incorporated in the State of Delaware and is a wholly-...

  18. Fotometria de grupos compactos de galxias no infravermelho prximo

    NASA Astrophysics Data System (ADS)

    Brasileiro, F.; Mendes de Oliveira, C.

    2003-08-01

    Apresentamos medidas nas bandas J, H e K de cerca de 90 galxias em 34 grupos compactos. Atravs da combinao dos novos dados, com dados obtidos na literatura para a banda B, investigamos como as luminosidades, cores, tamanhos e massas das galxias em grupos compactos foram afetadas por processos dinmicos, e como essas diferem de galxias em ambientes menos densos. Uma comparao dos novos valores obtidos com aqueles listados no catlogo 2MASS, mostram que para 50 galxias estudadas em comum, as diferenas nas magnitudes J, H e K esto dentro dos erros fotomtricos. Atravs da construo dos diagramas de cor (J-H x H-K e B-H x J-K), percebemos que as galxias em grupos compactos ocupam posies no diagrama diferentes das posies de galxias em campo ou em aglomerados, sendo mais parecidas com as posies ocupadas por galxias HII, ou com excesso de poeira, acreditamos que tal deslocamento derivado do aumento da taxa de formao estelar.

  19. Identification and In-vivo Characterization of a Novel OhrR Transcriptional Regulator in Burkholderia xenovorans LB400

    SciTech Connect

    Nguyen, Tinh T.; Martí-Arbona, Ricardo; Hall, Richard S.; Maity, Tuhin; Valdez, Yolanda E.; Dunbar, John M.; Unkefer, Clifford J.; Unkefer, Pat J.

    2013-05-21

    Transcriptional regulators (TRs) are an important and versatile group of proteins, yet very little progress has been achieved towards the discovery and annotation of their biological functions. We have characterized a previously unknown organic hydroperoxide resistance regulator from Burkholderia xenovoransLB400, Bxe_B2842, which is homologous to E. coli’s OhrR. Bxe_B2842 regulates the expression of an organic hydroperoxide resistance protein (OsmC). We utilized frontal affinity chromatography coupled with mass spectrometry (FAC-MS) and electrophoretic mobility gel shift assays (EMSA) to identify and characterize the possible effectors of the regulation by Bxe_B2842. Without an effector, Bxe_B2842 binds a DNA operator sequence (DOS) upstream of osmC. FAC-MS results suggest that 2-aminophenol binds to the protein and is potentially an effector molecule. EMSA analysis shows that 2-aminophenol also attenuates the Bxe_B2842’s affinity for its DOS. EMSA analysis also shows that organic peroxides attenuate Bxe_B2842/DOS affinity, suggesting that binding of the TR to its DOS is regulated by the two-cysteine mechanism, common to TRs in this family. Bxe_B2842 is the first OhrR TR to have both oxidative and effector-binding mechanisms of regulation. Our paper reveals further mechanistic diversity TR mediated gene regulation and provides insights into methods for function discovery of TRs.

  20. Identification and In-vivo Characterization of a Novel OhrR Transcriptional Regulator in Burkholderia xenovorans LB400

    DOE PAGESBeta

    Nguyen, Tinh T.; Martí-Arbona, Ricardo; Hall, Richard S.; Maity, Tuhin; Valdez, Yolanda E.; Dunbar, John M.; Unkefer, Clifford J.; Unkefer, Pat J.

    2013-05-21

    Transcriptional regulators (TRs) are an important and versatile group of proteins, yet very little progress has been achieved towards the discovery and annotation of their biological functions. We have characterized a previously unknown organic hydroperoxide resistance regulator from Burkholderia xenovoransLB400, Bxe_B2842, which is homologous to E. coli’s OhrR. Bxe_B2842 regulates the expression of an organic hydroperoxide resistance protein (OsmC). We utilized frontal affinity chromatography coupled with mass spectrometry (FAC-MS) and electrophoretic mobility gel shift assays (EMSA) to identify and characterize the possible effectors of the regulation by Bxe_B2842. Without an effector, Bxe_B2842 binds a DNA operator sequence (DOS) upstream ofmore » osmC. FAC-MS results suggest that 2-aminophenol binds to the protein and is potentially an effector molecule. EMSA analysis shows that 2-aminophenol also attenuates the Bxe_B2842’s affinity for its DOS. EMSA analysis also shows that organic peroxides attenuate Bxe_B2842/DOS affinity, suggesting that binding of the TR to its DOS is regulated by the two-cysteine mechanism, common to TRs in this family. Bxe_B2842 is the first OhrR TR to have both oxidative and effector-binding mechanisms of regulation. Our paper reveals further mechanistic diversity TR mediated gene regulation and provides insights into methods for function discovery of TRs.« less

  1. Density of states of short channel amorphous In-Ga-Zn-O thin-film transistor arrays fabricated using manufacturable processes

    NASA Astrophysics Data System (ADS)

    Kim, Soo Chang; Kim, Young Sun; Kanicki, Jerzy

    2015-05-01

    The effect of temperature on the electrical characteristics of the short channel amorphous In-Ga-Zn-O (a-IGZO) thin-film transistor (TFT) arrays fabricated using manufacturable processes was investigated. This work shows that the fabricated TFT arrays are acceptable and stable enough for manufacturing of the ultra high definition (UHD) active matrix liquid crystal displays in size larger than 55 in. We observed that studied a-IGZO TFT arrays obeyed the Meyer-Neldel (MN) rule over a broad range of gate bias voltages. The MN rule and exponential subgap density of states (DOS) model were combined to extract the DOS distribution for the investigated a-IGZO TFT arrays. The results were consistent with the previous works on single a-IGZO TFTs. This study demonstrates that this method of DOS extraction can be applied to both single devices and arrays, and is reproducible from lab to lab. We believe that this approach of DOS extraction is useful for further development of UHD flat panel display technology.

  2. Jorge de Lima: Brazilian Poet

    ERIC Educational Resources Information Center

    Kennedy, James H.

    1973-01-01

    Discusses Jorge de Lima--born in Uniao dos Palmares, Brazil on April 23, 1893, died in Rio de Janeiro on November 15, 1953--who during the Twenties became an important member of the literary movement known as Modernism and wrote both religious and regional poetry constituting the beginnings of a Afro-Brazilian poetry. (Author/JM)

  3. Welcome to the Second Computer Revolution: A Beginner's Guide to CD-ROM.

    ERIC Educational Resources Information Center

    Bowers, Richard A.

    1994-01-01

    Describes CD-ROM technologies, including how to access them. Highlights include a history of CD-ROM development; multimedia; Macintosh versus DOS/Window users; CD-ROM XA; adding audio and video; Photo CD; video compression; new products; and a list of companies, their CD-ROM products, features and costs. (LRW)

  4. COATING ALTERNATIVES GUIDE (CAGE) USER'S GUIDE (EPA/600/R-01/030)

    EPA Science Inventory

    The guide provides instructions for using the Coating Alternatives GuidE (CAGE) software program, version 1.0. It assumes that the user is familiar with the fundamentals of operating an IBM-compatible personal computer (PC) under the Microsoft disk operating system (MS-DOS). CAGE...

  5. 78 FR 19077 - Forwarding of Asylum Applications to the Department of State

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-29

    ... removing the mandatory submission of all asylum applications to DOS. See 76 FR 67099 (Oct. 31, 2011). The... consistent with similar changes USCIS has already made. See 74 FR 15367 (Apr. 6, 2009). \\1\\ EOIR receives and... into separate chapters, chapter I for DHS and chapter V for the Department of Justice. See 68 FR...

  6. 8 CFR 1212.6 - Border crossing identification cards.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... with the applicable DOS regulations at 22 CFR 41.32 and/or instructions. (b) Use(1) Application for... expiration of the validity of the form(1) At a POE. (i) In accordance with 22 CFR 41.122, a Form DSP-150 or... with 8 CFR part 235, the applicant shall be advised in writing that he or she may request a...

  7. 8 CFR 1212.6 - Border crossing identification cards.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... with the applicable DOS regulations at 22 CFR 41.32 and/or instructions. (b) Use(1) Application for... expiration of the validity of the form(1) At a POE. (i) In accordance with 22 CFR 41.122, a Form DSP-150 or... with 8 CFR part 235, the applicant shall be advised in writing that he or she may request a...

  8. 8 CFR 1212.6 - Border crossing identification cards.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... with the applicable DOS regulations at 22 CFR 41.32 and/or instructions. (b) Use(1) Application for... expiration of the validity of the form(1) At a POE. (i) In accordance with 22 CFR 41.122, a Form DSP-150 or... with 8 CFR part 235, the applicant shall be advised in writing that he or she may request a...

  9. 8 CFR 1212.6 - Border crossing identification cards.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... with the applicable DOS regulations at 22 CFR 41.32 and/or instructions. (b) Use(1) Application for... expiration of the validity of the form(1) At a POE. (i) In accordance with 22 CFR 41.122, a Form DSP-150 or... with 8 CFR part 235, the applicant shall be advised in writing that he or she may request a...

  10. A report on the task of collecting geological and structural data in Rio de Janeiro state

    NASA Astrophysics Data System (ADS)

    Chiang, L. C.; Rodrigues, J. E.

    1983-08-01

    The geological structure of 13 profiles of Rio de Janeiro State are described. Structural data useful to the study of the tectonics are examined. Almost 7000 points, faults and foliations were measured, mainly in the rocks of the two principal stratigraphic units in the state: Paraiba and Serra dos Orgaos Groups.

  11. REFERENCE MANUAL FOR RASSMIT VERSION 2.1: SUB-SLAB DEPRESSURIZATION SYSTEM DESIGN PERFORMANCE SIMULATION PROGRAM

    EPA Science Inventory

    The report is a reference manual for RASSMlT Version 2.1, a computer program that was developed to simulate and aid in the design of sub-slab depressurization systems used for indoor radon mitigation. The program was designed to run on DOS-compatible personal computers to ensure ...

  12. 48 CFR 637.104-70 - Personal services contracts.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 48 Federal Acquisition Regulations System 4 2010-10-01 2010-10-01 false Personal services... CATEGORIES OF CONTRACTING SERVICE CONTRACTING Service Contracts-General 637.104-70 Personal services contracts. Pursuant to FAR 37.104(b), DOS statutory authorities for personal services contracts are (a)...

  13. Good Research and Faculty Buy-in: 2 Keys to Effective Marketing

    ERIC Educational Resources Information Center

    Blumenstyk, Goldie

    2008-01-01

    Effective marketing requires more than a sleek new logo. This article presents excerpts of an online discussion on the dos and don'ts of college marketing with Mary R. Stagaman, associate vice president for external relations at the University of Cincinnati. In this discussion, she noted that good research and faculty buy-in are the two keys to…

  14. Breach, Leach, and Transport-Multiple Species GRID

    Energy Science and Technology Software Center (ESTSC)

    2006-04-01

    BLTMS-GRID is a FORTRAN code developed to facilitate specifications of a finite-element grid for the Nuclear Regulatory Commission code called Breach, Leach, and Transport - Multiple Species (BLT-MS). BLTMS-GRID is an open-source code. It functions under a DOS window.

  15. Another Mexico

    ERIC Educational Resources Information Center

    Romano, Carlin

    2009-01-01

    A Mexican saying holds that "Como Mexico no hay dos"--There is only one Mexico. American media these days interpret that notion with a vengeance. Story after story depicts a country overrun by out-of-control drug wars and murder, where corrupt police officers trip over beheaded victims more often than they nab perpetrators. South of the border, a

  16. Determination of hydrogen density of states in amorphous silicon using fractional evolution experiments

    SciTech Connect

    Franz, A.J.; Jackson, W.B.; Gland, J.L.

    1997-07-01

    Hydrogen plays an important role in the electronic behavior, structure and stability of amorphous silicon films. Therefore, determination of the hydrogen density of states (DOS) and correlation of the hydrogen DOS with the electronic film properties are important research goals. The authors have developed a novel method for determination of hydrogen DOS in silicon films, based on fractional evolution experiments. Fractional evolution experiments are performed by subjecting a silicon film to a series of linear, alternating heating and cooling ramps, while monitoring the hydrogen evolution rate. The fractional evolution data can be analyzed using two complementary methods, the fixed frequency factor approach and Arrhenius analysis. Using a rigorous, mean-field evolution model, they demonstrate the applicability of the two approaches to obtaining the hydrogen DOS in silicon films. They further validate both methods by analyzing experimental fractional evolution data for an amorphous silicon carbide film. Both types of analysis yield a similar double peaked density of states for the a-Si:C:H:D film.

  17. Distance Education at Memorial University of Newfoundland.

    ERIC Educational Resources Information Center

    Keough, Erin

    This presentation describes the distance education program at Memorial University (Newfoundland), which operates the Telemedicine Centre, including an audiographic, teleconference network that uses a combination of hardware and software to turn an MS DOS computer into an interactive long distance blackboard. Topics covered by the presentation…

  18. Acoustic measurement of the granular density of state

    NASA Astrophysics Data System (ADS)

    Owens, Eli; Daniels, Karen

    2011-10-01

    Measurements of the vibrational density of states (DOS) in glasses reveal that an excess number of low-frequency modes, as compared to the Debye scaling seen in crystalline materials, is associated with a loss of mechanical rigidity. An excess number of modes have also been observed experimentally in colloids and in simulations of idealized granular materials near the jamming point. However, there have not been any experimental measurements in an athermal granular system. We experimentally probe the material by mimicking thermal motion with acoustic waves, thereby allowing us to measure a DOS like quantity by analogy with conventional solid state techniques. Our system is made up of two dimensional photoelastic disks which allow visualization of the internal force structure, and a voice coil driver provides a white noise signal to excite a broad spectrum of vibrations. The sound is then detected with piezoelectric sensors embedded inside a subset of the particles. These measurements give us the particle velocities, from which we are able to compute a DOS by taking the Fourier transform of the velocity autocorrelation function. We measure this DOS as a function of the confining pressure and degree of disorder and find that the peak in the density of states shifts to higher frequency as the system pressure is increased.

  19. The Significance of the Understanding of Balance and Coordination in Self-Cognitive "Bio-Electro-Biblio/Info" Systems.

    ERIC Educational Resources Information Center

    Tsai, Bor-sheng

    1991-01-01

    Examines the information communication process and proposes a fuzzy commonality model for improving communication systems. Topics discussed include components of an electronic information programing and processing system and the flow of the formation and transfer of information, including DOS (disk operating system) commands, computer programing

  20. TAIGA: Twente Advanced Interactive Graphic Authoring System. A New Concept in Computer Assisted Learning (CAL) and Educational Research. Doc 88-18.

    ERIC Educational Resources Information Center

    Pilot, A.

    TAIGA (Twente Advanced Interactive Graphic Authoring system) is a system which can be used to develop instructional software. It is written in MS-PASCAL, and runs on computers that support MS-DOS. Designed to support the production of structured software, TAIGA has a hierarchical structure of three layers, each with a specific function, and each

  1. '"My Land, Your Social Transformation": Conflicts within the Landless People Movement (MST), Rio De Janeiro, Brazil

    ERIC Educational Resources Information Center

    Caldeira, Rute

    2008-01-01

    The Brazilian "Movimento dos Trabalhadores Rurais Sem-Terra" (MST) is one of the best-known and most prominent rural social movements. The unequal distribution of land in Brazil, and the neglect of this problem by successive Brazilian governments contributed greatly to the organisation of rural movements striving for the implementation of land

  2. Vel-Puppis Spur Arm - Espectroscopa en cmulos abiertos

    NASA Astrophysics Data System (ADS)

    Giorgi, E. E.; Solivella, G. R.; Vzquez, R. A.; Baume, G. L.; Seggewiss, W.

    Presentamos la clasificacin espectral Pismis 8 con el objetivo de asegurar la membresia o no de los objetos que fotomtricamente presentan peculiaridades o de clasificar aquellos objetos brillantes que no tienen ningun dato espectroscpico. El material analizado fue obtenido en CASLEO, utilizando REOSC-DS en dos turnos del presente ao.

  3. Flash Cards and Animation Software for Education.

    ERIC Educational Resources Information Center

    Byers, John A.

    1999-01-01

    Describes how a software program for DOS/Windows manages a collection of pictures such as photographic slides, overheads, or computer images in one or more databases. Explains how it transforms image files to raw binary files that can then be displayed like flash cards, or as an animated series of images. (Author/LRW)

  4. Photoabsorption spectrum of the Ce@C82 endohedral fullerene

    NASA Astrophysics Data System (ADS)

    Chen, Zhifan; Msezane, Alfred Z.

    2014-04-01

    DOS's for the photoabsorption of the Ce atom encapsulated inside the C82 have been calculated using TDDFT method. The results demonstrate the great suppression of the Ce 4f decay. This calculation confirms the experimental result which observed no confinement resonances in the Ce@C82 photoionization

  5. 48 CFR 624.202 - Policy.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... OF PRIVACY AND FREEDOM OF INFORMATION Freedom of Information Act 624.202 Policy. DOS regulations... the public, of Title 22 of the Code of Federal Regulations (22 CFR Part 171). ... 48 Federal Acquisition Regulations System 4 2014-10-01 2014-10-01 false Policy. 624.202...

  6. 48 CFR 624.202 - Policy.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... OF PRIVACY AND FREEDOM OF INFORMATION Freedom of Information Act 624.202 Policy. DOS regulations... the public, of Title 22 of the Code of Federal Regulations (22 CFR Part 171). ... 48 Federal Acquisition Regulations System 4 2013-10-01 2013-10-01 false Policy. 624.202...

  7. 48 CFR 624.202 - Policy.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... OF PRIVACY AND FREEDOM OF INFORMATION Freedom of Information Act 624.202 Policy. DOS regulations... the public, of Title 22 of the Code of Federal Regulations (22 CFR Part 171). ... 48 Federal Acquisition Regulations System 4 2012-10-01 2012-10-01 false Policy. 624.202...

  8. 48 CFR 624.202 - Policy.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... OF PRIVACY AND FREEDOM OF INFORMATION Freedom of Information Act 624.202 Policy. DOS regulations... the public, of Title 22 of the Code of Federal Regulations (22 CFR Part 171). ... 48 Federal Acquisition Regulations System 4 2010-10-01 2010-10-01 false Policy. 624.202...

  9. DATALINK: Records inventory data collection software. User`s guide

    SciTech Connect

    Cole, B.A.

    1995-03-01

    DATALINK was created to provide an easy to use data collection program for records management software products. It provides several useful tools for capturing and validating record index data in the field. It also allows users to easily create a comma delimited, ASCII text file for data export into most records management software products. It runs on virtually any computer us MS-DOS.

  10. AnoGen: A Program for Generating ANOVA Data Sets.

    ERIC Educational Resources Information Center

    Miller, Jeff

    1999-01-01

    Describes a computer program called AnoGen that automates the process of generating data sets for ANOVA designs and operates within DOS and Windows compatible computers. Explains that the program runs in both student and teacher modes and is freely available for noncommercial use through the Internet. (CMK)

  11. Comparing Reactivation Behavior of TIG and Laser Beam Welded Alloy 690

    NASA Astrophysics Data System (ADS)

    Abraham, Geogy J.; Bhambroo, Rajan; Kain, V.; Dey, G. K.; Raja, V. S.

    2013-02-01

    The nickel base Alloy 690 was subjected to simulated autogenous welding treatment employing two different techniques, laser beam welding (LBW) and tungsten inert gas (TIG) welding. The resultant weld fusion zone (WFZ) and heat-affected zone (HAZ) were compared by studying the reactivation behavior. The chromium depletion effect was assessed by measuring the degree of sensitization (DOS) from the electrochemical potentiodynamic reactivation (EPR) test. A double-loop EPR test for Alloy 690 was employed to measure the DOS at different regions of weldments by masking the remaining regions. The results clearly demonstrated that Alloy 690 showed no sensitization in the parent material and the WFZ region of both TIG and laser weldments. However, it exhibited reactivation in the HAZ region of both the weldments. The DOS values measured for Alloy 690 were very low for all the regions of the LBW weldment as compared to that in the TIG weldment. The HAZ region of the LBW weldment showed the highest DOS value in any region of the weldment but even this value was quite low indicating absence of sensitization in LBW weldment. The attack along the grain boundaries for the weldments after EPR experiments were studied using optical and scanning electron microscopy.

  12. The Politics of Teacher Professional Development: Policy, Research and Practice. Routledge Research in Education

    ERIC Educational Resources Information Center

    Hardy, Ian

    2012-01-01

    "The Politics of Teacher Professional Development: Policy, Research and Practice" provides innovative insights into teachers' continuing development and learning in contemporary western contexts. Rather than providing a list of "how-tos" and "must dos," this volume is premised on the understanding that by learning more about the current conditions…

  13. Chapter 14. New tools to assess nitrogen management for conservation of our biosphere

    Technology Transfer Automated Retrieval System (TEKTRAN)

    There are several tools that can be used to assess the effects of management on nitrogen (N) losses to the environment. The Nitrogen Loss and Environmental Assessment Package (NLEAP) is an improved and renamed version of the DOS program that was called the Nitrate Leaching and Economic Analysis Pack...

  14. PREVALNCIA DE ENDOSSIMBIONTES Cardinium EM POPULAES DE CAROS Brevipalpus phoenicis DE DIFERENTES REGIES BRASILEIRAS.

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Em B. phoenicis (Geijskes) (Acari: Tenuipalpidae), caro vetor de importantes fitovrus, a presena de endossimbiontes do gnero Cardinium relaciona-se ao processo de feminilizao dos machos, acarretando em elevada proporo de fmeas em populaes naturais. At o momento, no conhecido se este e...

  15. Dysfunction Screening in Experimental Arteriovenous Grafts for Hemodialysis Using Fractional-Order Extractor and Color Relation Analysis.

    PubMed

    Wu, Ming-Jui; Chen, Wei-Ling; Kan, Chung-Dann; Yu, Fan-Ming; Wang, Su-Chin; Lin, Hsiu-Hui; Lin, Chia-Hung

    2015-12-01

    In physical examinations, hemodialysis access stenosis leading to dysfunction occurs at the venous anastomosis site or the outflow vein. Information from the inflow stenosis, such as blood pressure, pressure drop, and flow resistance increases, allows dysfunction screening from the stage of early clots and thrombosis to the progression of outflow stenosis. Therefore, this study proposes dysfunction screening model in experimental arteriovenous grafts (AVGs) using the fractional-order extractor (FOE) and the color relation analysis (CRA). A Sprott system was designed using an FOE to quantify the differences in transverse vibration pressures between the inflow and outflow sites of an AVG. Experimental analysis revealed that the degree of stenosis (DOS) correlated with an increase in fractional-order dynamic errors (FODEs). Exponential regression was used to fit a non-linear curve and can be used to quantify the relationship between the FODEs and DOS (R (2) = 0.8064). The specific ranges were used to evaluate the stenosis degree, such as DOS: <50, 50-80, and >80%. A CRA-based screening method was derived from the hue angle-saturation-value color model, which describes perceptual color relationships for the DOS. It has a flexibility inference manner with color visualization to represent the different stenosis degrees, which has average accuracy >90% superior to the traditional methods. This in vitro experimental study demonstrated that the proposed model can be used for dysfunction screening in stenotic AVGs. PMID:26577479

  16. Comparison of anaesthesia 'Day 1 skills' expectations between veterinary anaesthetists and general practitioners.

    PubMed

    Duncan, J C; Ross, M; Rhind, S; Clutton, E; Shaw, D J

    2015-02-28

    Day One Skills (DOS) were introduced by the Royal College of Veterinary Surgeons (RCVS) in 2006 as a guideline for minimum skills required by a veterinary graduate. However, the RCVS anaesthesia DOS are broad and do not specify differences in skills required for different species. The aims of this study were: (1) to determine which anaesthesia skills were considered essential for day one practice by UK-based veterinary practitioners (GPs) and anaesthetists; and (2) to explore current opinions on veterinary undergraduate anaesthesia training. Questionnaires for veterinary GPs (QGPs) and veterinary anaesthetists (QVAs) were developed which asked general information on expectations of anaesthesia skills as well as specific expectations for the common veterinary species. Fifty-five UK-based members of the Association of Veterinary Anaesthetists responded, with a random sample of veterinary practices stratified by UK county generating 234 responses and a convenience sample targeted at more specialist veterinary specialities in the UK generating 161 responses. There was close overall agreement between the two groups of GPs and anaesthetists on essential anaesthesia DOS. However, expectations varied with species-greatest in cats and dogs, lowest in exotics. Many respondents commented that new veterinary graduates lack practical skills and should not be expected to be omnicompetent across all species. In conclusion, anaesthesia undergraduate training should prioritise essential practical DOS. PMID:25448541

  17. Density of states and excitonic condensation in the double layer correlated systems

    NASA Astrophysics Data System (ADS)

    Apinyan, V.; Kope?, T. K.

    2016-01-01

    We consider the single-particle density of states (DOS) in the strongly correlated double layer (DL) system, without applied external fields. We demonstrate an unusual collapse effect in the spectrum of the normal single-particle spectral function at the particular high-symmetry point corresponding to the specific bunching-point solution of the chemical potential in the Frenkel channel. We show that at the low-temperature limit the anomalous spectral function obeys a concave like structure, which is directly related to the interlayer pair formation and condensation. We calculate the normal DOS functions, and we find their temperature dependence for different values of the interlayer Coulomb interaction parameter. We show that the normal electron and hole DOS functions demonstrate typical condensates double peak structures on the background of the excitonic pair formation quasiparticle spectra and we have found the evidence of the hybridization gap in the case of high-temperature limit, and small interlayer coupling parameter. Meanwhile, we show a possible crossover from the excitonic condensate regime into the band insulator state. The structure of the normal DOS spectra, in the Frenkel channel and for the strong interlayer coupling regime, is found gapless for all temperature limits, which clearly indicates the strong coherence effects in the DL structure, and the excitonic condensates therein. We have shown that the excitonic pair formation and pair condensation occur simultaneously in the DL system, in contrast with the purely three-dimensional (3D) or two-dimensional cases (2D), discussed previously.

  18. Multi Platform Graphics Subroutine Library

    Energy Science and Technology Software Center (ESTSC)

    1992-02-21

    DIGLIB is a collection of general graphics subroutines. It was designed to be small, reasonably fast, device-independent, and compatible with DEC-supplied operating systems for VAXes, PDP-11s, and LSI-11s, and the DOS operating system for IBM PCs and IBM-compatible machines. The software is readily usable by casual programmers for two-dimensional plotting.

  19. A Tutorial for the Student Edition (Release 1.1) of Minitab.

    ERIC Educational Resources Information Center

    MacFarland, Thomas W.; Hou, Cheng-I

    This guide for using Minitab requires DOS version 2.0 or greater, 512K RAM memory, two double-sided diskette drives, and a graphics monitor. Topics covered in the tutorial are Getting started; Installation; Making a data diskette; Entering data; Central tendency and dispersion; t-test; Chi-square test; Oneway ANOVA test; Twoway ANOVA test; and…

  20. CD-ROM Growth: Unleashing the Potential.

    ERIC Educational Resources Information Center

    Nelson, Nancy Melin

    1991-01-01

    Discusses the use of CD-ROMs in library processing and public services units. Topics discussed include local area networks, workstations, network security, search software, disk operating systems (DOS), computer viruses, CD-ROM selection and acquisition, licensing, and standards. A sidebar lists current CD-ROM products appropriate for reference

  1. Di-n-butyl Phthalate (DNBP) and Diisobutyl Phthalate (DiBP) Metabolism in a Human Volunteer after Single Oral Doses [Journal Article

    EPA Science Inventory

    An individual (male, 36 years, 87 kg) ingested two separate doses of di-n-butyl phthalate (DnBP) and diisobutyl phthalate (DiBP) at a rate of ~60 g/kg. Key monoester and oxidized metabolites were identified and quantified in urine continuously collected until 48 hours post dos...

  2. A CASE STUDY USING THE EPA'S WATER QUALITY MODELING SYSTEM, THE WINDOWS INTERFACE FOR SIMULATING PLUMES (WISP)

    EPA Science Inventory

    Wisp, the Windows Interface for Simulating Plumes, is designed to be an easy-to-use windows platform program for aquatic modeling. Wisp inherits many of its capabilities from its predecessor, the DOS-based PLUMES (Baumgartner, Frick, Roberts, 1994). These capabilities have been ...

  3. Microcomputers in Education: A Self-Paced Orientation.

    ERIC Educational Resources Information Center

    Carey, Doris; Carey, Regan

    Designed to serve as a self-paced computer course for education students with no experience using microcomputers, this manual contains instructions for operating an Apple IIe microcomputer, its introductory software, and Bank Street Writer, using the DOS 3.3 System Master. The lessons, which contain illustrations and sample screens, include…

  4. GEOCHEM-EZ: a chemical speciation program with greater power and flexibility

    Technology Transfer Automated Retrieval System (TEKTRAN)

    GEOCHEM –EZ is a multi-functional chemical speciation program, which was designed to replace the existing GEOCHEM-PC, a program that can only be used on DOS consoles. Chemical speciation programs, such as GEOCHEM (Sposito and Mattigod, 1980) and GEOCHEM-PC (Parker et al., 1995), have been excellent ...

  5. Tracing And Control Of Engineering Requirements

    NASA Technical Reports Server (NTRS)

    Turner, Philip R.; Stoller, Richard L.; Neville, Ted; Boyle, Karen A.

    1991-01-01

    TRACER (Tracing and Control of Engineering Requirements) is data-base/word-processing software system created to document and maintain order of both requirements and descriptions associated with engineering project. Implemented on IBM PC under PC-DOS. Written with CLIPPER.

  6. Riding the Wave to Reach the Masses: Natural Events in Early Twentieth Century Portuguese Daily Press

    ERIC Educational Resources Information Center

    Simoes, Ana; Carneiro, Ana; Diogo, Maria Paula

    2012-01-01

    This paper brings together science communicated in newspapers in Portugal by looking at how news on natural events were communicated in two different newspapers--the capital newspaper "Diario de Noticias" ("Daily News") and the "Diario dos Acores" ("Azores Daily"). In particular, we look at how the 1900 solar eclipse, a hot topic throughout

  7. Occurrence of Cryptosporidium andersoni in Brazilian cattle

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Feces were collected from 68 cattle, 1 to 12 mo of age, on 12 farms in the municipality of Campos dos Goytacazes, Rio de Janeiro, Brazil, and examined for the presence of Cryptosporidium sp. All samples were subjected to molecular analysis by polymerase chain reaction (nested PCR) of the 18S rRNA. F...

  8. American Osteopathic Association Commitment to Quality and Lifelong Learning

    ERIC Educational Resources Information Center

    Tunanidas, Amelia G.; Burkhart, Diane N.

    2005-01-01

    The American Osteopathic Association (AOA) initiated programs to enhance quality for 54, 000 doctors of osteopathic medicine (DOs) practicing in the United States. Seven core competencies are required in undergraduate and graduate medical education standards. They include osteopathic philosophy and osteopathic manipulative medicine, medical

  9. From Resume to Teaching Job: What You Need to Know

    ERIC Educational Resources Information Center

    Clement, Mary C.

    2012-01-01

    The teacher job market has become very competitive, but the good news is that there are jobs in schools. Candidates who do their homework and work at getting a job with the same dedication they put into earning their teaching licensure will be employable. In this article, the author discusses the the dos and don'ts of the job search--including

  10. On Mitigating Distributed Denial of Service Attacks

    ERIC Educational Resources Information Center

    Gao, Zhiqiang

    2006-01-01

    Denial of service (DoS) attacks and distributed denial of service (DDoS) attacks are probably the most ferocious threats in the Internet, resulting in tremendous economic and social implications/impacts on our daily lives that are increasingly depending on the well-being of the Internet. How to mitigate these attacks effectively and efficiently

  11. Electronic properties of monolayer MoS2 in a modulated magnetic field

    NASA Astrophysics Data System (ADS)

    Li, T. S.; Ho, Y. H.

    2016-01-01

    The low-energy electronic properties of molybdenum disulfide subject to the influence of a spatially-modulated magnetic field are investigated by using the Peierls tight-binding method. The band structure is found to be composed of many oscillatory parabolic subbands, which are left-right asymmetric. The electronic properties are strongly dependent on the strength and period of the modulated field. The density of states (DOS) displays many asymmetric square-root divergent peaks originating from these parabolic subbands. They can be categorized into primary and secondary peaks according to their heights. The evolution of the DOS peaks with the field strength and modulation period is explored. The energies of the DOS peaks are linearly dependent on the field strength. Furthermore, the energies of the primary peaks depend weakly on the modulation period, whereas those of the secondary ones diminish with rising period. These predictions can be validated by measuring the spectra of STS or performing magneto transmission experiments. The effects of the spin-orbit coupling on the energy spectrum and DOS are also investigated.

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

    NASA Astrophysics Data System (ADS)

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

    2003-08-01

    A partir de 1998, entrou em operao regular no INPE, em So Jos dos Campos, o Brazilian Solar Spectroscope (BSS). O BSS dedicado s observaes de exploses solares decimtricas com alta resoluo temporal e espectral, com a principal finalidade de investigar fenmenos associados com a liberao de energia dos "flares" solares. Entre os anos de 1999 e 2002, foram catalogadas, aproximadamente 340 exploses solares classificadas em 8 tipos distintos, de acordo com suas caractersticas morfolgicas. Na anlise detalhada de cada tipo, ou grupo, de exploses solares deve-se considerar a variao do fluxo do sol calmo ("background"), em funo da freqncia e a variao temporal, alm da complexidade das exploses e estruturas finas registradas superpostas ao fundo varivel. Com o intuito de realizar tal anlise foi desenvolvido o programa BSSData. Este programa, desenvolvido em linguagem C++, constitudo de vrias ferramentas que auxiliam no tratamento e anlise dos dados registrados pelo BSS. Neste trabalho iremos abordar as ferramentas referentes filtragem do rudo de fundo. As rotinas do BSSData para filtragem de rudo foram testadas nos diversos grupos de exploses solares ("dots", "fibra", "lace", "patch", "spikes", "tipo III" e "zebra") alcanando um bom resultado na diminuio do rudo de fundo e obtendo, em conseqncia, dados onde o sinal torna-se mais homogneo ressaltando as reas onde existem exploses solares e tornando mais precisas as determinaes dos parmetros observacionais de cada exploso. Estes resultados sero apresentados e discutidos.

  13. American Osteopathic Association Commitment to Quality and Lifelong Learning

    ERIC Educational Resources Information Center

    Tunanidas, Amelia G.; Burkhart, Diane N.

    2005-01-01

    The American Osteopathic Association (AOA) initiated programs to enhance quality for 54, 000 doctors of osteopathic medicine (DOs) practicing in the United States. Seven core competencies are required in undergraduate and graduate medical education standards. They include osteopathic philosophy and osteopathic manipulative medicine, medical…

  14. 48 CFR 601.301 - Policy.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 48 Federal Acquisition Regulations System 4 2011-10-01 2011-10-01 false Policy. 601.301 Section... ACQUISITION REGULATIONS SYSTEM Agency Acquisition Regulations 601.301 Policy. (a) The Assistant Secretary of..., promulgate, and amend DOS acquisition policies, rules, and regulations. (b) The Department of...

  15. 48 CFR 624.202 - Policy.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... the public, of Title 22 of the Code of Federal Regulations (22 CFR Part 171). ... 48 Federal Acquisition Regulations System 4 2011-10-01 2011-10-01 false Policy. 624.202 Section... OF PRIVACY AND FREEDOM OF INFORMATION Freedom of Information Act 624.202 Policy. DOS...

  16. 48 CFR 604.1300 - Policy.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 48 Federal Acquisition Regulations System 4 2011-10-01 2011-10-01 false Policy. 604.1300 Section 604.1300 Federal Acquisition Regulations System DEPARTMENT OF STATE GENERAL ADMINISTRATIVE MATTERS Personal Identity Verification of Contractor Personnel 604.1300 Policy. The DOS official responsible...

  17. A Sociolinguistic Study of Differential Object Marking (DOM) in Two Varieties of Contemporary Spanish

    ERIC Educational Resources Information Center

    Balasch Rodriguez, Sonia

    2011-01-01

    This sociolinguistic-variationist investigation sheds light on two little-studied issues concerning Spanish DOM, or variable use of a before animate "direct objects" (DOs), in vernacular language: the complex interaction of co-occurring linguistic (type of verb; definiteness, specificity, grammatical number, topicality, type and…

  18. Death Obsession in Palestinians

    ERIC Educational Resources Information Center

    Abdel-Khalek, Ahmed M.; Al-Arja, Nahida S.; Abdalla, Taysir

    2006-01-01

    The authors explored death obsession level and correlates among a sample (N=601) of Palestinians living in the city of Beit Jala, the village of Al-Khader, and the Aida refugee camp in the Bethlehem area. They live in war conditions; the houses of half of them have been demolished. The Death Obsession Scale (DOS) was administered. Its alpha

  19. Mono-parametric charge pumping through a quantum dot coupled with energy-gapped leads

    NASA Astrophysics Data System (ADS)

    Kwapi?ski, Tomasz; Taranko, Ryszard

    2015-06-01

    We present a proposal for a single-parametric electron pump composed of a quantum dot between two unbiased leads with energy-gapped electron density of states (DOS). The model tight-binding Hamiltonian and the evolution operator technique are used in the calculations. The quantum dot is driven by the external harmonic field which leads to the pumping current flowing from the left or right electrode depending on the system parameters. We show that the net pumping current appears in the system if (i) there are at least two sideband states: one of them lying below and the second lying above the Fermi energy; (ii) the left and right lead DOS in the vicinity of these sideband states are different. Moreover, the energy-gapped structure of DOS is visible on the average quantum dot charge and the pumped current curves as well as on the transconductance characteristics. Thus mono-parametric pumping provides useful information about the system parameters, in particular about the lead DOS structure.

  20. How To Conduct Self-Administered and Mail Surveys. The Survey Kit, Volume 3.

    ERIC Educational Resources Information Center

    Bourque, Linda B.; Fielder, Eve P.

    The nine-volume Survey Kit is designed to help readers prepare and conduct surveys and become better users of survey results. All the books in the series contain instructional objectives, exercises and answers, examples of surveys in use, illustrations of survey questions, guidelines for action, checklists of "dos and don'ts," and annotated

  1. Selective Guide to Literature on Software Review Sources. Engineering Literature Guides, Number 8.

    ERIC Educational Resources Information Center

    Bean, Margaret H., Ed.

    This selective literature guide serves as a directory to software evaluation sources for all sizes of microcomputers. Information is provided on review sources and guides which deal with a variety of applications such as library, engineering, school, and business as well as a variety of systems, including DOS and CP/M. This document is intended to…

  2. Validity of the concept of band edge in organic semiconductors

    NASA Astrophysics Data System (ADS)

    Horowitz, Gilles

    2015-09-01

    Because most organic semiconductors are disordered, the more appropriate function to describe their density of states (DOS) is the Gaussian distribution. A striking difference between the Gaussian DOS and the parabolic DOS found in conventional inorganic semiconductors is the fact that it does not allow for a simple and straightforward definition of the band edge. The most usual way found in the literature to define the band edge of a Gaussian DOS consists of extrapolating the tangent to the inflection point of the Gaussian curve. The aim of this paper is to discuss the validity of such a way of conduct. An analysis of data found in the literature shows that the width of the Gaussian distribution is significantly larger than what usually retained in transport models. It is also shown that the validity of the usual definition for the band edge is questioned by the fact that the density of charge carriers behave as a degenerate distribution, even at relatively low doping levels.

  3. Another Mexico

    ERIC Educational Resources Information Center

    Romano, Carlin

    2009-01-01

    A Mexican saying holds that "Como Mexico no hay dos"--There is only one Mexico. American media these days interpret that notion with a vengeance. Story after story depicts a country overrun by out-of-control drug wars and murder, where corrupt police officers trip over beheaded victims more often than they nab perpetrators. South of the border, a…

  4. The Impact of Phonological Neighborhood Density on Typical and Atypical Emerging Lexicons

    ERIC Educational Resources Information Center

    Stokes, Stephanie F.

    2014-01-01

    According to the Extended Statistical Learning account (ExSL; Stokes, Kern & dos Santos, 2012) late talkers (LTs) continue to use neighborhood density (ND) as a cue for word learning when their peers no longer use a density learning mechanism. In the current article, LTs expressive ("active") lexicon ND values differed from those of…

  5. Evaluating School-Based Psychological and Counselling Services in Macao Using a Qualitative Approach

    ERIC Educational Resources Information Center

    van Schalkwyk, Gertina J.; Sit, Holly H. Y.

    2013-01-01

    The purpose of this study was to explore the status of psychological services in schools in Macao, and the role of school counsellors providing these services. At present, school psychology is not a recognized profession within the territory and school counsellors appointed by the Direccao dos Servicos de Educacao e Juventude (DSEJ) through their

  6. Andreev bound states in superconductor/ferromagnetic junctions

    NASA Astrophysics Data System (ADS)

    Dobrosavljevic-Grujic, Ljiljana; Radovic, Zoran; Prokic, Vesna; Zikic, R.

    2000-09-01

    Assuming tunneling perpendicular to the layers, Andreev bound states are studied theoretically in atomic-scale S/F superlattices, where S is a conventional superconductor, and F is a ferromagnet. The nonmonotonic dependence of the critical current on the exchange field h in F layers is a consequence of (pi) -phase formation. The shape of the spectra of spin-splitted densities of states (DOS) depends strongly on h and on the transfer integral t between the layers; for an appropriate choice of these parameters zero-energy bound states (ZES) may appear. Considering in-plane tunneling in high-Tc S/F/S Josephson weak links with thin, ferromagnetic metal barrier, DOS is calculated assuming that the a-axes of the crystals in two S electrodes are misoriented for an angle (theta) . In the anisotropic d-wave case the number of peaks in DOS, corresponding to the Andreev bound states, can be greater than in the isotropic s-wave case. DOS strongly depends on h, (theta) , and on the macroscopic phase difference (phi) across the link.

  7. Newsletter for Asian and Middle Eastern Languages on Computer, Volume 1, Numbers 3 & 4.

    ERIC Educational Resources Information Center

    Meadow, Anthony, Ed.

    1986-01-01

    Volume 1, numbers 3 and 4, of the newsletter on the use of non-Western languages with computers contains the following articles: "Reversing the Screen under MS/PC-DOS" (Dan Brink); "Comments on Diacritics Using Wordstar, etc. and CP/M Software for Non-Western Languages" (Michael Broschat); "Carving Tibetan in Silicon: A Tibetan Font for the

  8. Multi-locus DNA sequencing of Toxoplasma gondii isolated from Brazilian pigs identifies genetically divergent strains

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Five Toxoplasma gondii isolates (TgPgBr1-5) were isolated from hearts and brains of pigs freshly purchased at the market of Campos dos Goytacazes, Northern Rio de Janeiro State, Brazil. Four of the five isolates were highly pathogenic in mice. Four genotypes were identified. Multi-locus DNA sequenci...

  9. An obligately aerobic soil bacterium activates fermentative hydrogen production to survive reductive stress during hypoxia.

    PubMed

    Berney, Michael; Greening, Chris; Conrad, Ralf; Jacobs, William R; Cook, Gregory M

    2014-08-01

    Oxygen availability is a major factor and evolutionary force determining the metabolic strategy of bacteria colonizing an environmental niche. In the soil, conditions can switch rapidly between oxia and anoxia, forcing soil bacteria to remodel their energy metabolism accordingly. Mycobacterium is a dominant genus in the soil, and all its species are obligate aerobes. Here we show that an obligate aerobe, the soil actinomycete Mycobacterium smegmatis, adopts an anaerobe-type strategy by activating fermentative hydrogen production to adapt to hypoxia. This process is controlled by the two-component system DosR-DosS/DosT, an oxygen and redox sensor that is well conserved in mycobacteria. We show that DosR tightly regulates the two [NiFe]-hydrogenases: Hyd3 (MSMEG_3931-3928) and Hyd2 (MSMEG_2719-2718). Using genetic manipulation and high-sensitivity GC, we demonstrate that Hyd3 facilitates the evolution of H2 when oxygen is depleted. Combined activity of Hyd2 and Hyd3 was necessary to maintain an optimal NAD(+)/NADH ratio and enhanced adaptation to and survival of hypoxia. We demonstrate that fermentatively-produced hydrogen can be recycled when fumarate or oxygen become available, suggesting Mycobacterium smegmatis can switch between fermentation, anaerobic respiration, and aerobic respiration. Hydrogen metabolism enables this obligate aerobe to rapidly meet its energetic needs when switching between microoxic and anoxic conditions and provides a competitive advantage in low oxygen environments. PMID:25049411

  10. Emergence of new insect-restrictive viruses in the Amazon region.

    PubMed

    Nunes, Mrcio R T; Silva, Sandro P; Carvalho, Valria L; Vasconcelos, Janaina M; Da Silva, Daisy E A; Oliveira, Layanna F; Nunes Neto, Joaquim P; Rodrigues, Sueli G; Azevedo, Raimunda S S; Monteiro, Hamilton A O; Cardoso, Jedson F; Guzman, Hilda; Tesh, Robert; Vasconcelos, Pedro F C; Vianez-Jnior, Joo L S G; Martins, Lvia C

    2015-01-01

    The complete genome was determined for 12 viruses isolated from 8 different pools of mosquitoes (Culex sp. and Psorophora ferox) collected at Brejeira farm, Canaan dos Carajas, Para state in northern Brazil. Eight of the viruses were distantly related to Piura virus, hereafter designated as Brejeira virus; the other 4 were similar to Wallerfield virus. PMID:25792052

  11. Emergence of New Insect-Restrictive Viruses in the Amazon Region

    PubMed Central

    Silva, Sandro P.; Carvalho, Valria L.; Vasconcelos, Janaina M.; Da Silva, Daisy E. A.; Oliveira, Layanna F.; Nunes Neto, Joaquim P.; Rodrigues, Sueli G.; Azevedo, Raimunda S. S.; Monteiro, Hamilton A. O.; Cardoso, Jedson F.; Guzman, Hilda; Tesh, Robert; Vasconcelos, Pedro F. C.; Vianez-Jnior, Joo L. S. G.; Martins, Lvia C.

    2015-01-01

    The complete genome was determined for 12 viruses isolated from 8 different pools of mosquitoes (Culex sp. and Psorophora ferox) collected at Brejeira farm, Canaan dos Carajas, Para state in northern Brazil. Eight of the viruses were distantly related to Piura virus, hereafter designated as Brejeira virus; the other 4 were similar to Wallerfield virus. PMID:25792052

  12. Teaching Writing.

    ERIC Educational Resources Information Center

    Powers, Brenda

    1996-01-01

    Presents ideas for tools useful for teaching writing in elementary school, such as carbon paper, stick-on flags, blank books, scissors, rulers, tape, stationery, postcards, card stands, clotheslines, and Polaroid cameras. Notes on materials dos and don'ts and special writing projects are included. (SM)

  13. La Artesania Mexicana (Mexican Handicrafts).

    ERIC Educational Resources Information Center

    Steele, Bettina

    This booklet contains instructions in English and Spanish for making eleven typical Mexican craft articles. The instructions are accompanied by pen-and-ink drawings. The objects are (1) "La Rosa" (The Rose); (2) "El Crisantemo" (The Chrysanthemum); (3) "La Amapola" (The Poppy); (4) "Ojos de Dios" (God's Eyes); (5) "Ojitos con dos caras" (Two-Sided

  14. The Significance of the Understanding of Balance and Coordination in Self-Cognitive "Bio-Electro-Biblio/Info" Systems.

    ERIC Educational Resources Information Center

    Tsai, Bor-sheng

    1991-01-01

    Examines the information communication process and proposes a fuzzy commonality model for improving communication systems. Topics discussed include components of an electronic information programing and processing system and the flow of the formation and transfer of information, including DOS (disk operating system) commands, computer programing…

  15. A Sociolinguistic Study of Differential Object Marking (DOM) in Two Varieties of Contemporary Spanish

    ERIC Educational Resources Information Center

    Balasch Rodriguez, Sonia

    2011-01-01

    This sociolinguistic-variationist investigation sheds light on two little-studied issues concerning Spanish DOM, or variable use of a before animate "direct objects" (DOs), in vernacular language: the complex interaction of co-occurring linguistic (type of verb; definiteness, specificity, grammatical number, topicality, type and

  16. Microcomputers in Education: A Self-Paced Orientation.

    ERIC Educational Resources Information Center

    Carey, Doris; Carey, Regan

    Designed to serve as a self-paced computer course for education students with no experience using microcomputers, this manual contains instructions for operating an Apple IIe microcomputer, its introductory software, and Bank Street Writer, using the DOS 3.3 System Master. The lessons, which contain illustrations and sample screens, include

  17. On Mitigating Distributed Denial of Service Attacks

    ERIC Educational Resources Information Center

    Gao, Zhiqiang

    2006-01-01

    Denial of service (DoS) attacks and distributed denial of service (DDoS) attacks are probably the most ferocious threats in the Internet, resulting in tremendous economic and social implications/impacts on our daily lives that are increasingly depending on the well-being of the Internet. How to mitigate these attacks effectively and efficiently…

  18. Stability and nonlinear optical properties of Cu nanoparticles prepared by femtosecond laser ablation of Cu target in alcohol and water

    NASA Astrophysics Data System (ADS)

    Fan, Guanghua; Ren, Shoutian; Qu, Shiliang; Wang, Qiang; Gao, Renxi; Han, Min

    2014-11-01

    By using PVP of different concentrations as the protective agent, Cu nanoparticles (NPs) of different mean sizes are fabricated through laser ablation of Cu target in alcohol, water, and their mixtures. As-grown Cu NPs show good stability in alcohol. The nonlinear absorptions of Cu NPs with different mean sizes are investigated. With the increase of laser intensity, the nonlinear absorption of small NPs changes from saturable absorption (SA) to reverse saturable absorption (RSA) and two-photon absorption (TPA), whereas SA dominates the nonlinear absorption of the large NPs. The modulations of occupied and unoccupied density of states (DOS) in conduction band are proposed to be the key factors for the size-dependence of the nonlinear absorption. For the large Cu NPs, there are sufficiently occupied DOS in the ground state and unoccupied DOS in the first excited state to sustain the increase of SA, whereas for the small Cu NPs, the corresponding DOS is insufficient, so the SA is surpassed by the RSA and TPA at high laser excitation intensity.

  19. 78 FR 33995 - Nuclear Proliferation Assessment in Licensing Process for Enrichment or Reprocessing Facilities

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-06

    ... designed to minimize proliferation risks world-wide, including the Nuclear Non- Proliferation Treaty, the U... nuclear nonproliferation goals and policies. The U.S. Department of State (DOS), working with the U.S... aligned with the broader national nuclear nonproliferation policies and goals established by the...

  20. MEMS startups: disruptive technology and business do's and don'ts

    NASA Astrophysics Data System (ADS)

    Bryzek, Janusz

    2005-02-01

    This paper characterizes factors that affect the probability of success for new startups. These guidelines are derived primarily from Venture Capital industry experience in funding disruptive technology companies. It follows with an overview of Silicon Valley MEMS and MOEMS startups and provides with a summary of Do"s and Don"ts for entrepreneurs.

  1. A General Population Twin Study of the CBCL/6-18 DSM-Oriented Scales

    ERIC Educational Resources Information Center

    Spatola, Chiara A. M.; Fagnani, Corrado; Pesenti-Gritti, Paola; Ogliari, Anna; Stazi, Maria-Antonietta; Battaglia, Marco

    2007-01-01

    Objective: To explore the contributions of genetic and environmental influences to individual variation and covariation of the Child Behavior Checklist (CBCL) DSM-oriented scales (DOS) originally proposed by Achenbach and associates in 2001. Method: A classic twin study of 398 twin pairs ages 8 to 17 years belonging to the population-based Italian

  2. The Impact of Phonological Neighborhood Density on Typical and Atypical Emerging Lexicons

    ERIC Educational Resources Information Center

    Stokes, Stephanie F.

    2014-01-01

    According to the Extended Statistical Learning account (ExSL; Stokes, Kern & dos Santos, 2012) late talkers (LTs) continue to use neighborhood density (ND) as a cue for word learning when their peers no longer use a density learning mechanism. In the current article, LTs expressive ("active") lexicon ND values differed from those of

  3. KINEXP: Computer Simulation in Enzyme Kinetics.

    ERIC Educational Resources Information Center

    Gelpi, Josep Lluis; Domenech, Carlos

    1988-01-01

    Describes a program which allows students to identify and characterize several kinetic inhibitory mechanisms. Uses the generic model of reversible inhibition of a monosubstrate enzyme but can be easily modified to run other models such as bisubstrate enzymes. Uses MS-DOS BASIC. (MVL)

  4. An obligately aerobic soil bacterium activates fermentative hydrogen production to survive reductive stress during hypoxia

    PubMed Central

    Berney, Michael; Greening, Chris; Conrad, Ralf; Jacobs, William R.; Cook, Gregory M.

    2014-01-01

    Oxygen availability is a major factor and evolutionary force determining the metabolic strategy of bacteria colonizing an environmental niche. In the soil, conditions can switch rapidly between oxia and anoxia, forcing soil bacteria to remodel their energy metabolism accordingly. Mycobacterium is a dominant genus in the soil, and all its species are obligate aerobes. Here we show that an obligate aerobe, the soil actinomycete Mycobacterium smegmatis, adopts an anaerobe-type strategy by activating fermentative hydrogen production to adapt to hypoxia. This process is controlled by the two-component system DosR-DosS/DosT, an oxygen and redox sensor that is well conserved in mycobacteria. We show that DosR tightly regulates the two [NiFe]-hydrogenases: Hyd3 (MSMEG_3931-3928) and Hyd2 (MSMEG_2719-2718). Using genetic manipulation and high-sensitivity GC, we demonstrate that Hyd3 facilitates the evolution of H2 when oxygen is depleted. Combined activity of Hyd2 and Hyd3 was necessary to maintain an optimal NAD+/NADH ratio and enhanced adaptation to and survival of hypoxia. We demonstrate that fermentatively-produced hydrogen can be recycled when fumarate or oxygen become available, suggesting Mycobacterium smegmatis can switch between fermentation, anaerobic respiration, and aerobic respiration. Hydrogen metabolism enables this obligate aerobe to rapidly meet its energetic needs when switching between microoxic and anoxic conditions and provides a competitive advantage in low oxygen environments. PMID:25049411

  5. 78 FR 28267 - Self-Regulatory Organizations; The Options Clearing Corporation; Order Approving Proposed Rule...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-14

    ..., 2013), 78 FR 18382 (March 26, 2013). II. Description of the Proposed Rule Change The purpose of the... the DTC to transfer loaned stock and collateral between OCC clearing members. Currently, for OCC... Trust Company (``DTC'') and maintain accounts to facilitate Delivery Orders (``DOs'') to...

  6. The Politics of Teacher Professional Development: Policy, Research and Practice. Routledge Research in Education

    ERIC Educational Resources Information Center

    Hardy, Ian

    2012-01-01

    "The Politics of Teacher Professional Development: Policy, Research and Practice" provides innovative insights into teachers' continuing development and learning in contemporary western contexts. Rather than providing a list of "how-tos" and "must dos," this volume is premised on the understanding that by learning more about the current conditions

  7. Synthesis, crystal structure and properties of the new superconductors TaRuB and NbOsB

    NASA Astrophysics Data System (ADS)

    Zheng, Qiang; Gumeniuk, Roman; Rosner, Helge; Schnelle, Walter; Prots, Yurii; Burkhardt, Ulrich; Grin, Yuri; Leithe-Jasper, Andreas

    2015-10-01

    Two new ternary compounds TaRuB and NbOsB were synthesized by arc-melting and annealing at 1500-1850 C. They crystallize in orthorhombic primitive structures with space group Pbam. Magnetic susceptibility, electrical resistivity, and specific heat measurements reveal bulk superconductivity for metallic TaRuB with a {{T}\\text{c}}? 4 K. Electronic structure calculations by DFT methods show that 4d and 5d transition-metal states dominate the density of states (DOS) at the Fermi level {{E}\\text{F}} with a pronounced quasi one-dimensional behaviour along the [0 0 1] direction. Comparison of the calculated DOS at {{E}\\text{F}} with specific heat data reveals a moderate electron-phonon coupling. Possible small boron vacancies could significantly reduce the DOS at {{E}\\text{F}} , hence decrease {{T}\\text{c}} for samples annealed at higher temperatures. For NbOsB, the DOS({{E}\\text{F}} ) is strongly reduced due to an increase of covalent bonding interactions between Os and B. Accordingly, a lower {{T}\\text{c}} ? 1 K is observed.

  8. Synthesis, crystal structure and properties of the new superconductors TaRuB and NbOsB.

    PubMed

    Zheng, Qiang; Gumeniuk, Roman; Rosner, Helge; Schnelle, Walter; Prots, Yurii; Burkhardt, Ulrich; Grin, Yuri; Leithe-Jasper, Andreas

    2015-10-21

    Two new ternary compounds TaRuB and NbOsB were synthesized by arc-melting and annealing at 1500-1850 C. They crystallize in orthorhombic primitive structures with space group Pbam. Magnetic susceptibility, electrical resistivity, and specific heat measurements reveal bulk superconductivity for metallic TaRuB with a T(c) ? 4 K. Electronic structure calculations by DFT methods show that 4d and 5d transition-metal states dominate the density of states (DOS) at the Fermi level E(F) with a pronounced quasi one-dimensional behaviour along the [0 0 1] direction. Comparison of the calculated DOS at E(F) with specific heat data reveals a moderate electron-phonon coupling. Possible small boron vacancies could significantly reduce the DOS at E(F), hence decrease T(c) for samples annealed at higher temperatures. For NbOsB, the DOS(E(F)) is strongly reduced due to an increase of covalent bonding interactions between Os and B. Accordingly, a lower T(c) ? 1 K is observed. PMID:26418029

  9. Breach, Leach, and Transport-Multiple Species UNCERT

    Energy Science and Technology Software Center (ESTSC)

    2006-04-01

    BLTPLOT_UNCERT is a FORTRAN code developed to facilitate plotting of 2-D concentration data for the Nuclear Regulatory Commission code called Breach, Leach, and Transport - Multiple Species (BLT-MS). BLTPLOT_UNCERT is open-source code. It functions under a DOS window.

  10. Confronting Crisis. A Comparative Study of Household Responses to Poverty and Vulnerability in Four Poor Urban Communities. Environmentally Sustainable Development Studies and Monographs Series No. 8.

    ERIC Educational Resources Information Center

    Moser, Caroline O. N.

    This volume presents the main findings of a comparative study of four poor urban communities in countries experiencing economic difficulties during the late 1980s: Chawama (Zambia), Cisne Dos (Ecuador), Commonwealth (the Philippines), and Angyalfold (Hungary). The study extended a longitudinal community panel study begun in Ecuador by using a

  11. Windows While You Work: Integrated Windowing Environments Give You Easy Access to Applications Power.

    ERIC Educational Resources Information Center

    Miller, Michael J.; McMillan, Tom

    1984-01-01

    Outlines basic choices available in on-screen windowing systems which create separate areas or boxes on microcomputer display screens to simplify control of traditional computer applications. Systems described include Visicorp's Visi On, Microsoft Windows, Digital Research's Concurrent DOS, Quarterdeck's DesQ, Structured Systems' Window Master,

  12. Rural Schools Find College Partners to Overcome Isolation.

    ERIC Educational Resources Information Center

    Carriuolo, Nancy

    1992-01-01

    Despite their isolation and limited tax support, U.S. rural schools are finding collaboration with colleges and universities a cost-effective way to stimulate improvement. Large-scale partnerships often derive from tentative discussions between a few school and college faculty members. One sterling example is Dos Palos High School and California

  13. Synthesis, characterization, and evaluation of 10-undecenoic acid-based epithio derivatives as multifunctional additives.

    PubMed

    Geethanjali, Gorla; Padmaja, Korlipara V; Sammaiah, Arukali; Prasad, Rachapudi B N

    2014-11-26

    Novel epithio compounds from alkyl epoxy undecanoates (n-alkyl, C1, C4, and C6; isoalkyl, C3, C4, and C8) were synthesized using an ammonium thiocyanate in ionic liquid 1-methylimidazolium tetrafluoroborate/H2O (2:1) solvent system in 85-90% yields by gas chromatographic (GC) analysis. The synthesized products were characterized by (1)H and (13)C nuclear magnetic resonance spectroscopy, Fourier transform infrared spectroscopy (FTIR), gas chromatography, and GC mass spectral (GC-MS) analyses and evaluated for their antioxidant, extreme pressure (EP), and antiwear (AW) properties in three different base oils, namely, epoxy jatropha fatty acid n-butyl esters (EJB), di-2-ethylhexyl sebacate (DOS), and mineral oil (S-105). Among the synthesized products, n-butyl epithio undecanoate exhibited superior antioxidant property (229.2 C) compared to butylated hydroxytoluene (BHT, 193.8 C) in base oil DOS and comparable performance in EJB and S-105 base oils. All of the epithio derivatives exhibited significantly enhanced weld point for the base oils EJB and DOS at 2 wt % level and displayed moderate enhancement in S-105 base oil. Methyl epithio undecanoate at 0.6% concentration exhibited considerable improvement in the wear scar of DOS base oil. The synthesized epithio derivatives have potential as multifunctional additives in lubricant formulations. PMID:25369173

  14. Painless File Extraction: The A(rc)--Z(oo) of Internet Archive Formats.

    ERIC Educational Resources Information Center

    Simmonds, Curtis

    1993-01-01

    Discusses extraction programs needed to postprocess software downloaded from the Internet that has been archived and compressed for the purposes of storage and file transfer. Archiving formats for DOS, Macintosh, and UNIX operating systems are described; and cross-platform compression utilities are explained. (LRW)

  15. Library Automation Alternatives in 1996 and User Satisfaction Ratings of Library Users by Operating System.

    ERIC Educational Resources Information Center

    Cibbarelli, Pamela

    1996-01-01

    Examines library automation product introductions and conversions to new operating systems. Compares user satisfaction ratings of the following library software packages: DOS/Windows, UNIX, Macintosh, and DEC VAX/VMS. Software is rated according to documentation, service/support, training, product reliability, product capabilities, ease of use,

  16. Using CHAINS, a QuickBASIC 4.5 Program, to Teach Single-Subject Experimentation with Humans

    ERIC Educational Resources Information Center

    Dermer, Marshall Lev

    2004-01-01

    Students enrolled in a single-subject design course studied the repeated acquisition of response sequences by using CHAINS, a QuickBASIC 4.5 program, which runs in DOS or Windows. For about 2 months, students examined the learning of such sequences as a function of various treatments. Each week students graphed their data, discussed their

  17. Publishing from the Desktop and[ Biting into the Apple.

    ERIC Educational Resources Information Center

    Deal, Zack J.; And Others

    1986-01-01

    The first of two articles discusses the current status of desktop publishing, including some of its benefits and limitations. The second article compares and critiques both hardware and software currently available for the Macintosh and for MS-DOS microcomputers. A glossary of typographic terms is included. (CLB)

  18. BIOSIM2 USER'S MANUAL, VERSION 2.0.03 - A PROGRAM THAT APPLIES THE COEFFICIENT OF BIOTIC SIMILARITY, B, TO COMPLEX DATA MATRICES

    EPA Science Inventory

    The Pinkham-Pearson index of similarity has been evaluated by EPA as one of the more powerful tools for comparing community structure in its rapid bioassessment protocol. However, its use has been limited because the program that ran it, BioSim1, was only available in DOS format....

  19. 8 CFR 212.6 - Border crossing identification cards.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... Application, to obtain a Form DSP-150 in accordance with the applicable DOS regulations at 22 CFR 41.32 and/or... 22 CFR 41.122, a Form DSP-150 or combined B-1/B-2 visitor visa and non-biometric border crossing... expedited removal in accordance with 8 CFR part 235, the applicant shall be advised in writing that he...

  20. Literary Aspects of a Girlie Magazine: The Literary Contributions of Esquire, 1933-43.

    ERIC Educational Resources Information Center

    Peterson, Thane

    From its inauspicious beginnings as a men's store giveaway and a "girlie" magazine in 1933, "Esquire" magazine quickly established a policy of literary excellence. By 1945, the magazine included the works on such major literary figures as Erskine Caldwell, John Dos Passos, Dashiell Hammett, Ernest Hemingway, Ring Lardner, James T. Farrell, E. E.…