(Sorghum bicolor (L.) Moench) du Nord du Burkina Faso

African Journals Online (AJOL)

SARAH

29 déc. 2014 ... sorghos à grains sucrés ont un cycle court et arrivent donc à maturité avant les autres sorghos et le mil d'où leur exploitation comme aliment de soudure par les paysans. L'organisation de la diversité morphologique des accessions de sorghos à grains sucrés du Nord du. Burkina autour principalement des ...

Anlagen- und Kraftwerksrohrleitungsbau Greifswald GmbH plan and build wet decontamination plant for disposal of components of Russian nuclear submarines

International Nuclear Information System (INIS)

Schneider, Jan; Konitzer, Arnold; Luedeke, Michael

2010-01-01

Anlagen- und Kraftwerksrohrleitungsbau Greifswald, on behalf of Energiewerke Nord GmbH, Lubmin, plan and build a wet decontamination facility for the waste management center at Saida Bay, Russia (EZS). The plant is part of a large project with a total volume on the order of 3-digit millions funded by the German Federal Ministry for Economics and Technology. This project involves construction at Saida Bay near the port city of Murmansk of a complete waste management center and a long-term interim store for radioactively contaminated components. These components are mainly parts of decommissioned nuclear vessels and submarines whose metals, after decontamination, can be returned to economic use. The basis of the wet decontamination plant is a former AKB project for disposal and re-use of contaminated metal components of Energiewerke Nord GmbH at Lubmin, which is being adapted and developed further. The plant is to allow unrestricted re-use of the metals after surface cleaning and surface abrasion, respectively. For this purpose, the contaminated layer is removed far enough for the clearance limits under the Radiation Protection Ordinance to be met. A large fraction of the metals can be re-used after cleaning and do not have to be stored in a financially and logistically expensive process. The contract gives AKB an excellent opportunity to demonstrate its capabilities in plant construction, especially in the very sensitive area of disposal of radioactively contaminated objects. (orig.)

NordVal: A Nordic system for validation of alternative microbiological methods

DEFF Research Database (Denmark)

Qvist, Sven

2007-01-01

NordVal was created in 1999 by the Nordic Committee of Senior Officials for Food Issues under the Nordic Council of Ministers. The Committee adopted the following objective for NordVal: NordVal evaluates the performance and field of application of alternative microbiological methods. This includes...... analyses of food, water, feed, animal faeces and food environmental samples in the Nordic countries. NordVal is managed by a steering group, which is appointed by the National Food Administrations in Denmark, Finland, Iceland, Norway and Sweden. The background for creation of NordVal was a Danish...... validation system (DanVal) established in 1995 to cope with a need to validate alternative methods to be used in the Danish Salmonella Action Program. The program attracted considerable attention in the other Nordic countries. NordVal has elaborated a number of documents, which describe the requirements...

The Nord-Limousin uraniferous province. Its three main deposits; La province uranifere du Nord-Limousin. Ses trois principaux gisements

Energy Technology Data Exchange (ETDEWEB)

Sarcia, J.A. [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

1958-07-01

Les Sagnes, Margnac and Les Brugeauds are the three main known deposits in the Nord-Limousin region, a rich uraniferous area; already being mined, they have only been partially explored so far, and one can safely hope for further extensions: in fact, some of these hopes have come true already. Each of these three deposits correspond to a type frequently to be found in the region, and the three of them together represent the characteristics of the Nord-Limousin uraniferous region: that is why they were selected. (author) [French] Les trois gisements decrits ici, les Sagnes, Margnac, les Brugeauds, sont les principaux actuellement connus dans la region du Nord-Limousin, si riche en gites uraniferes; deja en exploitation, ils ne sont encore que partiellement explores, et tous les espoirs d'extension laterale sont permis: certains sont deja en voie de realisation. Chacun d'eux correspond a un type frequent dans la region, et ils illustrent a eux trois les caracteristiques de la province uranifere du Nord-Limousin: c'est la raison de leur choix. (auteur)

The Nord-Limousin uraniferous province. Its three main deposits; La province uranifere du Nord-Limousin. Ses trois principaux gisements

Energy Technology Data Exchange (ETDEWEB)

Sarcia, J A [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

1958-07-01

Les Sagnes, Margnac and Les Brugeauds are the three main known deposits in the Nord-Limousin region, a rich uraniferous area; already being mined, they have only been partially explored so far, and one can safely hope for further extensions: in fact, some of these hopes have come true already. Each of these three deposits correspond to a type frequently to be found in the region, and the three of them together represent the characteristics of the Nord-Limousin uraniferous region: that is why they were selected. (author) [French] Les trois gisements decrits ici, les Sagnes, Margnac, les Brugeauds, sont les principaux actuellement connus dans la region du Nord-Limousin, si riche en gites uraniferes; deja en exploitation, ils ne sont encore que partiellement explores, et tous les espoirs d'extension laterale sont permis: certains sont deja en voie de realisation. Chacun d'eux correspond a un type frequent dans la region, et ils illustrent a eux trois les caracteristiques de la province uranifere du Nord-Limousin: c'est la raison de leur choix. (auteur)

29 CFR 2200.39 - Statement of position.

Science.gov (United States)

2010-07-01

... 29 Labor 9 2010-07-01 2010-07-01 false Statement of position. 2200.39 Section 2200.39 Labor Regulations Relating to Labor (Continued) OCCUPATIONAL SAFETY AND HEALTH REVIEW COMMISSION RULES OF PROCEDURE... intervene, may file a statement of position with respect to any or all issues to be heard. The Judge may...

pluviosite en region soudano-sahelienne au nord du cameroun

African Journals Online (AJOL)

AISA

Dans le but de montrer qu'en zone soudano-sahélienne du Nord du ... principaux facteurs responsables de la variation des rendements en culture pluviale, une étude basée sur ... Mots clés : Risque climatique, pluviométrie, variation, rendement agricole, Nord Cameroun. ... d'analyse plus global et fonctionnel, à savoir,.

Nord-galerii näitab noori kunstnikke / Teele Tammeorg

Index Scriptorium Estoniae

Tammeorg, Teele

2010-01-01

20. mail avati Akadeemia Nord ruumides Nord Galerii (Siili 14, Tallinn) TÜ maalikunsti eriala lõpetanud Veiko Klemmeri ja Andrus Raagi ning nende lõputööde juhendaja ja galerii ühe rajaja Jaan Elkeni maalinäitusega "Võru-Tartu-Tallinn". Galerii pakub noortele kunstnikele võimalust oma töid tasuta eksponeerida

Baisse de la transmission de la douve du foie dans le nord-est de la ...

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

mortelle de cancer du foie liée à l'O. viverrini. Dans cer- taines régions, près de 85 % de la population est porteuse du parasite. Les villages du nord-est de la Thaïlande, où l'on raffole du poisson cru, ont des taux d'infection parmi les plus élevés du pays. Les personnes infectées peuvent porter le parasite adulte pendant ...

Online Business Strategy: Mazda Motor Europe GmbH

OpenAIRE

Peltokangas, Merja

2009-01-01

Mazda Motors is a japanese car manufacturer, founded in 1920. The headquarter is located in Hiroshima, Japan and the European headquarter is located in Leverkusen, Germany. The aim of this thesis is to investigate how Mazda Motor Europe GmbH could improve its accessory sales in the future and reach more young customers. Based on the research results Mazda Motor Europe GmbH can see how the main competitors are positioned in the market and consider its own strategy. In the theory part o...

Regium@Lepidi 2200 Project

Directory of Open Access Journals (Sweden)

Maurizio Forte

2015-05-01

Full Text Available Regium@Lepidi 2200 is an internationalproject designed with the scope to study and virtually reconstruct the Roman city of Regium Lepidi (Reggio Emilia. The final aim is the creation of a new virtual museum and IT room designed within the archaeological museum of Reggio Emilia.

NordForm90, Malmö1990

DEFF Research Database (Denmark)

Jensen, Henrik; Agger, Steen

2009-01-01

Boghuset (se dette) er en interaktiv, ikonbaseret brugerflade til en biblioteksdatabase, som blev til i et forskningssamarbejde mellem Forskningscenter Risø og Kunstakademiets Arkitektskole. Resultatet af dette blev udstillet på NordForm90 i Malmö, og projektet omtales i udstillingens katalog på ...

L’AMANT DE LA CHINE DU NORD, BY MARGUERITE DURAS: BOOK, FILM, NIGHT

Directory of Open Access Journals (Sweden)

Andréa Correa Paraiso Müller

2016-06-01

Full Text Available Na trajetória artística de Marguerite Duras, a relação entre cinema e literatura não se limita à passagem do texto à tela, mas compreende também o caminho inverso, da tela ao texto. Mais do que transformar filmes em livros, Duras fez literatura em diálogo com o cinema. No presente artigo, temos por objetivo analisar a maneira pela qual a linguagem cinematográfica perpassa a linguagem literária e vice-versa em L’Amant de la Chine du Nord (1991, texto que, embora chamado de romance por sua própria autora, organiza-se a partir de elementos próprios a um paratexto fílmico.

Prigonrieux – Le Bourg-Nord, Les Junies

OpenAIRE

Sandoz, Gérard

2013-01-01

Identifiant de l'opération archéologique : 7225529 Date de l'opération : 2009 (EX) Cette opération de diagnostic fait suite à un projet de lotissement et de construction de logements sociaux déposé par la mairie de Prigonrieux aux lieux-dits Le Bourg‑nord et Les Junies. L’intervention s’est déroulée du 2 février au 6 février 2009. Trente-deux sondages ont été réalisés ce qui représente 5 % de la surface menacée qui était de 34 683 m². Dans la partie nord du terrain, deux fossés parallèles ret...

29 CFR 2200.120 - Settlement procedure.

Science.gov (United States)

2010-07-01

... or other representative of a party what concessions his or her client should consider and assess... cooperate fully within the spirit of this rule may result in the imposition of sanctions under § 2200.101...

Merkel: Nord Streami on meile vaja / Kalev Kask

Index Scriptorium Estoniae

Kask, Kalev

2009-01-01

Venemaa presidendi Dmitri Medvedevi ja Saksamaa kantsleri Angela Merkeli kohtumisel käsitleti energeetikapoliitikat, D. Medvedev kutsus Rootsit üles toetama Nord Streami arendamist ning taunis Nabucco gaasijuhtme rajamist

"Konsesjon til radikalere" : Norges anerkjennelse av Nord-Vietnam i 1971

OpenAIRE

Sørensen, Cristian H.

2012-01-01

Emnet for oppgaven er Norges anerkjennelse av Nord-Vietnam som en selvstendig stat. Dette skjedde i 1971 mens Nord-Vietnam var i krig med Sør-Vietnam og USA. Norge var det første NATO-landet som fattet prinsippvedtak om dette, og Danmark fulgte etter. Det hele provoserte USA i så stor grad at Nixon-administrasjonen var nær ved å kalle ambassadørene sine i Oslo og København hjem. Det var regjeringen Bratteli som stod for utførelsen av anerkjennelsen etter at Arbeiderpartiet kom tilbake til reg...

Läänemeri vs Nord Stream / Ene Kaups

Index Scriptorium Estoniae

Kaups, Ene, 1963-

2009-01-01

Riigikogu võttis vastu avalduse Läänemerre kavandatava gaasijuhtmega seotud keskkonnariskidest, kus avaldatakse muret, et Nord Stream AG poolt algatatud gaasijuhtme projekti rahvusvahelise keskkonnamõju hinnangutes ei ole piisavalt arvestatud kõigi seonduvate keskkonnariskidega

Nord Stream, Sweden and Baltic Sea Security

Energy Technology Data Exchange (ETDEWEB)

Larsson, Robert L

2007-03-15

In June 2006, FOI published the report: Sweden and the NEGP: a Pilot Study of the North European Gas Pipeline and Sweden's Dependence on Russian Energy, a base data report on a topic that FOI considered to be of rising importance. Much has happened since then and the NEGP has changed its name to Nord Stream and submitted an official notification on the intention of realising the project of constructing a gas pipeline from Russia to Germany via the Baltic Sea. The primary aim of this report is to discuss and analyse some of the core aspects of Nord Stream and the pipeline project with regard to the security situation for the Baltic Sea region. The report constitutes an updated version of the previous report. Most of the old report still stands valid, especially concerning the historical survey of Russia's energy policy, but the new report has additional chapters and is broader in scope concerning the consequences of the project

Nord Stream, Sweden and Baltic Sea Security

Energy Technology Data Exchange (ETDEWEB)

Larsson, Robert L.

2007-03-15

In June 2006, FOI published the report: Sweden and the NEGP: a Pilot Study of the North European Gas Pipeline and Sweden's Dependence on Russian Energy, a base data report on a topic that FOI considered to be of rising importance. Much has happened since then and the NEGP has changed its name to Nord Stream and submitted an official notification on the intention of realising the project of constructing a gas pipeline from Russia to Germany via the Baltic Sea. The primary aim of this report is to discuss and analyse some of the core aspects of Nord Stream and the pipeline project with regard to the security situation for the Baltic Sea region. The report constitutes an updated version of the previous report. Most of the old report still stands valid, especially concerning the historical survey of Russia's energy policy, but the new report has additional chapters and is broader in scope concerning the consequences of the project

Nord Stream, Sweden and Baltic Sea Security

International Nuclear Information System (INIS)

Larsson, Robert L.

2007-03-01

In June 2006, FOI published the report: Sweden and the NEGP: a Pilot Study of the North European Gas Pipeline and Sweden's Dependence on Russian Energy, a base data report on a topic that FOI considered to be of rising importance. Much has happened since then and the NEGP has changed its name to Nord Stream and submitted an official notification on the intention of realising the project of constructing a gas pipeline from Russia to Germany via the Baltic Sea. The primary aim of this report is to discuss and analyse some of the core aspects of Nord Stream and the pipeline project with regard to the security situation for the Baltic Sea region. The report constitutes an updated version of the previous report. Most of the old report still stands valid, especially concerning the historical survey of Russia's energy policy, but the new report has additional chapters and is broader in scope concerning the consequences of the project

Ekspert: Nord Stream on kaheldav / Jaanus Piirsalu

Index Scriptorium Estoniae

Piirsalu, Jaanus, 1973-

2009-01-01

Konsultatsioonifirma East European Gas Analysis direktor Mihhail Kortšemkin arvab, et Gazprom hülgab Nord Streami projekti, kui ta ei saa Rootsi ja Soome nõusolekut ehitamiseks 2010. aasta jooksul. Tema hinnangul riskib Gazprom pankrotiga, kui hakkab korraga ehitama gaasitoru läbi Läänemere ja Musta mere

Gåsetrekket i Vesterålen og Nord-Trøndelag 2004

DEFF Research Database (Denmark)

Tombre, I.; Madsen, J.; Bakken, J.

for the goose species pink-footed goose Anser brachyrhynchus, barnacle goose Branta leucopsis and greylag goose Anser anser. The present report summarises goose registrations in some of the municipalities involved; Steinkjer and Inderøy in Nord-Trøndelag, Mid-Norway (pink-footed goose), and Sortland...... in Vesterålen, Northern Norway (pink-footed goose and barnacle goose). Registrations in the Nord-Trøndelag municipalities, Verdal and Levanger, are also included. Pink-footed and barnacle geese stage in Norway during spring on their way to their breeding grounds in Svalbard. In Trøndelag, the spring...... estimate of 43 000). This is probably an underestimate due to all hiding possibilities in the region, and it is assumed that at least 75 % of the Svalbard population of pink-footed goose stayed in Nord-Trøndelag in early May. Intensive scaring of geese registered at several locations in the county...

Nord Stream maksis kalurid kinni / Gert D Hankewitz

Index Scriptorium Estoniae

Hankewitz, Gert D

2010-01-01

Läbi Läänemere gaasijuhet ehitav firma Nord Stream maksis Eesti kaluritele sümboolset hüvitist, vältimaks tulevikus kahjunõudeid. Väidetavalt said Eesti kalurid hüvitist vähem kui Rootsi ja Soome kalapüüdjad

Magnetic property analysis as palaeoenvironmental proxy: a case study of the Last Interglacial Middle Palaeolithic site at Neumark-Nord 2 (Germany)

NARCIS (Netherlands)

Sier, M.J.; Dekkers, M.J.

2013-01-01

The so-called Blake Event, an event of the geomagnetic fi eld, was identifi ed in the Middle Palaeolithic Neumark-Nord 2 (NN2) site in Germany by Sier et al. (2o11). These authors discussed the implications for the positioning of the Eemian in the Marine isotope stage (MIS) scale in

Teaching Religion in Public Schools: Review of Warren A. Nord, "Does God Make a Difference?"

Science.gov (United States)

Feinberg, Walter

2013-01-01

In this review of Warren Nord's "Does God Make a Difference? Taking Religion Seriously in Our Schools and Universities," Walter Feinberg provides a detailed analysis of Nord's argument that the study of religion should be constitutionally mandated as a corrective to the overwhelmingly secular course of study offered in…

Bio energy heating plant heats municipal buildings in Nord-Odal; Bioenergisentral varmer kommunale bygg i Nord-Odal

Energy Technology Data Exchange (ETDEWEB)

2008-07-01

When Nord-Odal planned to build a new nursing home, they wanted to find a more environmental friendly heating system than based on oil and electricity. Several energy consultants evaluated the task. But when all consultants concluded there would be no cost benefit in this task, local experts looked into it - and because they got a long term agreement, it was possible to finance a local bio energy heat plant. (AG)

Gaasitoru rajaja Nord Stream : jätkame läbirääkimisi Soomega / Tuuli Koch

Index Scriptorium Estoniae

Koch, Tuuli

2007-01-01

Eesti valitsuse otsus mitte anda Nord Streamile uurimisluba tekitas Soome keskkonnaametnikes pahameelt. Nord Stream AG esindaja Jens D. Mülleri sõnul jätkatakse torujuhtme projekti. Välispoliitika Instituudi direktori Andres Kasekampi arvates laskis Eesti käest kaasarääkimise õiguse

The dynamics of risk premiums in Nord Pool's futures market

International Nuclear Information System (INIS)

Mork, E.

2006-01-01

Premiums in futures prices are usually considered through the use of 2 models: a no-arbitrage model; and the equilibrium approach or theory of normal backwardation. The no-arbitrage approach equates futures prices with spot prices, storage costs and convenience yields, and is difficult to apply to electricity markets. This paper investigated future electricity prices in Nord Pool's futures market using an equilibrium approach, which split futures prices into an expected spot price component and a risk premium component. Three main hypotheses were used: (1) that risk premiums were present in the Nord Pool futures market during the period 1997-2004; that risk premiums in the Nord Pool futures market were smaller or absent during the period of 2000 to 2002; and, that there was a significant change in risk premiums in Nord Pool's futures market after the winter of 2002-2003 due to a change in consumer hedging behaviour. Futures prices were compared to realized spot prices in their delivery periods in order to test the hypotheses. In order to estimate the futures premiums, a 1-sample test was performed on the entire period for 1, 30, 60, and 90 days before delivery of the block or month contract. The test employed the null hypothesis that the futures premiums were 0. Premiums were positive and varied between 3.7 per cent and 9.3 per cent. The purpose of the study was to determine whether risk premiums were present. Results showed that risk premiums varied over time. Two additional hypotheses were then investigated to examine whether the presence of outside speculators reduced risk premiums, and to see if a period of high prices and volatility caused more buyers to hedge in the futures market. Results showed that in the face of volatility and higher prices, consumers do not purchase fixed-price contracts which would ultimately increase futures premiums in the market. It was concluded that premiums are an important element in the pricing of Nord Pool futures and forwards

Spectrophotometric evaluation of selenium binding by Saccharomyces cerevisiae ATCC MYA-2200 and Candida utilis ATCC 9950 yeast.

Science.gov (United States)

Kieliszek, Marek; Błażejak, Stanisław; Płaczek, Maciej

2016-05-01

In this study, the ability of selenium binding the biomas of Saccharomyces cerevisiae ATCC MYA-2200 and Candida utilis ATCC 9950 was investigated. Sodium selenite(IV) salts were added to the experimental media at concentrations of 10, 20, 40, and 60 mg Se(4+) L(-1). In the tested concentration range, one concentration reported a significant reduction in the biomass yield of both yeast strains. Intense growth was observed for C. utilis yeast, which reached the highest biomass yield of 15 gd.w.L(-1) after 24h cultivation in the presence of 10mg Se(4+) L(-1). Based on the use of spectrophotometric method for the determination of selenium content by using Variamine Blue as a chromogenic agent, efficient accumulation of this element in the biomass of the investigated yeast was observed. The highest amount of selenium, that is, 5.64 mg Se(4+)gd.w.(-1), was bound from the environment by S. cerevisiae ATCC MYA-2200 cultured in the presence of 60 mg Se(4+) L(-1) medium 72h Slightly less amount, 5.47 mg Se(4+) gd.w.(-1), was absorbed by C. utilis ATCC 9950 during similar cultural conditions. Based on the results of the biomass yield and the use of selenium from the medium, it can be observed that yeasts of the genus Candida are more efficient in binding this element, and this property finds practical application in the production of selenium-enriched yeast. Copyright © 2016 Elsevier GmbH. All rights reserved.

Nord Stream 2: keeping the head cool

International Nuclear Information System (INIS)

Aoun, Marie-Claire

2016-01-01

Nord Stream 2 is the name of a project of a pipeline which will transport Russian natural gas into the European Union. The author first presents the context of this project announced during a forum in Saint Petersburg, and signed in september 2015 between Gazprom and several European stakeholders (Eon, BASF, Engie, Shell and OMV). The objective is for Moscow to secure its north-western European market on the long term. Some physical characteristics of the project are evoked, and the European dependence on gas imports is described. The author then discusses how European countries are divided about this project: some support it (like mainly Germany) while some others are fiercely against (Eastern European countries which complain about their loss of transfer revenues, or countries like Bulgaria, Greece and Italy about the loss of an alternative gas corridor). The project also faces legal obstacles related to patrimony separation and access of third parties to the network. Finally, and while mentioning other projects (Nord Stream 1 and South Stream), the author shows that the difficulties and problems faced by this project are a perfect illustration of a fractured European gas sector

NordREG report on the price peaks in the Nordic wholesale market during winter 2009-2010. Final report

Energy Technology Data Exchange (ETDEWEB)

2011-01-15

In winter 2009-2010, prices peaked on three days. The high prices that were experienced in the majority of the Nord Pool Spot price areas initiated a study on the reasons that led to the price spikes and on the possible measures to develop the Nordic market arrangements to avoid such situations in the future. The analysis of the winter 2009-2010 events revealed that there were a number of primary causes for the occurrence of the price peaks and no single individual cause could be pinpointed to bear the key responsibility. The fact that the weather was cold all over the Nordic area in conjunction with the low availability for the Swedish nuclear generation capacity, however, could be indicated as the key underlying causes. The analysis also showed that the way the Nordic transmission capacity is allocated can be listed as an additional factor complementing to the occurrence of the price peaks. Thus, NordREG concluded that a review of the methods of calculating and allocating transmission capacity for the market should be carried out. As a part of this, an analysis that addresses the delimitation of bidding areas and maintenance planning of the transmission network infrastructure should be prepared as well. The flexibility on the demand side has not been very large in the Nordic region. However, the background study prepared by Gaia Consulting showed that even small degree of increased price elasticity could substantially cut the price peaks. This could be seen as an improvement potential of the trading system reflecting the present inability of the market participants to react on the price signals the market place provides. Therefore, NordREG sees that facilitating the appearance of a real price elastic behaviour of the users of electricity can be regarded as one of the key fixes for the problem. Furthermore, NordREG proposes that a consultancy study on how to promote demand flexibility in the Nordic market in a coherent way should be prepared. A further area for

Forecasting Nord Pool day-ahead prices with an autoregressive model

International Nuclear Information System (INIS)

Kristiansen, Tarjei

2012-01-01

This paper presents a model to forecast Nord Pool hourly day-ahead prices. The model is based on but reduced in terms of estimation parameters (from 24 sets to 1) and modified to include Nordic demand and Danish wind power as exogenous variables. We model prices across all hours in the analysis period rather than across each single hour of 24 hours. By applying three model variants on Nord Pool data, we achieve a weekly mean absolute percentage error (WMAE) of around 6–7% and an hourly mean absolute percentage error (MAPE) ranging from 8% to 11%. Out of sample results yields a WMAE and an hourly MAPE of around 5%. The models enable analysts and traders to forecast hourly day-ahead prices accurately. Moreover, the models are relatively straightforward and user-friendly to implement. They can be set up in any trading organization. - Highlights: ► Forecasting Nord Pool day-ahead prices with an autoregressive model. ► The model is based on but with the set of parameters reduced from 24 to 1. ► The model includes Nordic demand and Danish wind power as exogenous variables. ► Hourly mean absolute percentage error ranges from 8% to 11%. ► Out of sample results yields a WMAE and an hourly MAPE of around 5%.

Nord Stream "ründas" Gotlandil Eestit / Tuuli Koch

Index Scriptorium Estoniae

Koch, Tuuli

2010-01-01

Vene- Saksa gaasijuhtme ehituse sõlmpunktiks muutuval Gotlandil jäi Slite sadamasse Nord Streami raha eest ehitatud kaile ette mälestusmärk eestlastele ja lätlastele, kes 1944. aastal punavõimu eest põgenedes Gotlandile jõudsid. Kaart

Cohort profile: the Nordic Antireflux Surgery Cohort (NordASCo).

Science.gov (United States)

Maret-Ouda, John; Wahlin, Karl; Artama, Miia; Brusselaers, Nele; Färkkilä, Martti; Lynge, Elsebeth; Mattsson, Fredrik; Pukkala, Eero; Romundstad, Pål; Tryggvadóttir, Laufey; Euler-Chelpin, My von; Lagergren, Jesper

2017-06-08

To describe a newly created all-Nordic cohort of patients with gastro-oesophageal reflux disease (GORD), entitled the Nordic Antireflux Surgery Cohort (NordASCo), which will be used to compare participants having undergone antireflux surgery with those who have not regarding risk of cancers, other diseases and mortality. Included were individuals with a GORD diagnosis recorded in any of the nationwide patient registries in the Nordic countries (Denmark, Finland, Iceland, Norway and Sweden) in 1964-2014 (with various start and end years in different countries). Data regarding cancer, other diseases and mortality were retrieved from the nationwide registries for cancer, patients and causes of death, respectively. The NordASCo includes 945 153 individuals with a diagnosis of GORD. Of these, 48 433 (5.1%) have undergone primary antireflux surgery. Median age at primary antireflux surgery ranged from 47 to 52 years in the different countries. The coding practices of GORD seem to have differed between the Nordic countries. The NordASCo will initially be used to analyse the risk of developing known or potential GORD-related cancers, that is, tumours of the oesophagus, stomach, larynx, pharynx and lung, and to evaluate the mortality in the short-term and long-term perspectives. Additionally, the cohort will be used to evaluate the risk of non-malignant respiratory conditions that might be caused by aspiration of gastric contents. © Article author(s) (or their employer(s) unless otherwise stated in the text of the article) 2017. All rights reserved. No commercial use is permitted unless otherwise expressly granted.

29 CFR 2200.62 - Postponement of hearing.

Science.gov (United States)

2010-07-01

... the concurrence of the Chief Administrative Law Judge. The original of any motion seeking a... Hearings § 2200.62 Postponement of hearing. (a) Motion to postpone. A hearing may be postponed by the Judge on his own initiative or for good cause shown upon the motion of a party. A motion for postponement...

Oriente within, Nord without: il meridionismo e i romantici inglesi

Directory of Open Access Journals (Sweden)

Luigi Cazzato

2012-11-01

Full Text Available Per Voltaire (1773 prima ed Hegel (2010 poi, la storia del progresso del mondo ha viaggiato seguendo il percorso geo-politico e climatico aristotelico 1: dal dispotico Oriente verso il libero Occidente; mentre per Montesquieu (1994 essa ha viaggiato anche dai paesi caldi del Sud, timorosi come i vecchi, verso i paesi freddi del Nord, coraggiosi come i giovani. L’Europa non si è vista solo come l’altro rispetto all’Oriente, ma anche come l’altro rispetto al suo Meridione: il presente moderno del Nord di contro al passato antico del Sud. Nella seconda metà del Settecento, il secolo della nascita dell’orientalismo come sapere organico all’impresa coloniale dell’Occidente, vennero gettati anche i semi della pianta del meridionismo, sapere organico all’impresa della costruzione della moderna identità europea. I romantici inglesi coltivarono questa pianta.

Bibliography for finite elements. [2200 references

Energy Technology Data Exchange (ETDEWEB)

Whiteman, J R [comp.

1975-01-01

This bibliography cites almost all of the significant papers on advances in the mathematical theory of finite elements. Reported are applications in aeronautical, civil, mechanical, nautical and nuclear engineering. Such topics as classical analysis, functional analysis, approximation theory, fluids, and diffusion are covered. Over 2200 references to publications up to the end of 1974 are included. Publications are listed alphabetically by author and also by keywords. In addition, finite element packages are listed.

Berliinis räägiti NordStreami venimisest / Raavo Raadik

Index Scriptorium Estoniae

Raadik, Raavo

2008-01-01

Financial Times Deutschland (FTD) ajakirjanikud vahendasid Vene gaasikontserni Gazprom juhatuse liikme Valeri Jassevi kinnitusi, et gaasijuhtme esimene osa peaks valmima 2011. aastal ja 2012. aastal peaks algama esimesed gaasitarned. Seni oli NordStream lähtunud varasematest tähtaegadest

Analysis of modeling aircraft noise with the Nord2000 noise model

Science.gov (United States)

2012-10-31

This report provides comparisons between AEDT/INM and the Nord 2000 Noise Models for the following parameters: ground type, simple terrain (downward slope, upward slope, hill), temperature and humidity, temperature gradients (positive and negative), ...

29 CFR 2200.92 - Review by the Commission.

Science.gov (United States)

2010-07-01

... Regulations Relating to Labor (Continued) OCCUPATIONAL SAFETY AND HEALTH REVIEW COMMISSION RULES OF PROCEDURE Posthearing Procedures § 2200.92 Review by the Commission. (a) Jurisdiction of the Commission; issues on... Commission to review the entire case. The issues to be decided on review are within the discretion of the...

The dynamics of risk premiums in Nord Pool's futures market

Energy Technology Data Exchange (ETDEWEB)

Mork, E. [Consultant, Oslo (Norway)

2006-04-15

Premiums in futures prices are usually considered through the use of 2 models: a no-arbitrage model; and the equilibrium approach or theory of normal backwardation. The no-arbitrage approach equates futures prices with spot prices, storage costs and convenience yields, and is difficult to apply to electricity markets. This paper investigated future electricity prices in Nord Pool's futures market using an equilibrium approach, which split futures prices into an expected spot price component and a risk premium component. Three main hypotheses were used: (1) that risk premiums were present in the Nord Pool futures market during the period 1997-2004; that risk premiums in the Nord Pool futures market were smaller or absent during the period of 2000 to 2002; and, that there was a significant change in risk premiums in Nord Pool's futures market after the winter of 2002-2003 due to a change in consumer hedging behaviour. Futures prices were compared to realized spot prices in their delivery periods in order to test the hypotheses. In order to estimate the futures premiums, a 1-sample test was performed on the entire period for 1, 30, 60, and 90 days before delivery of the block or month contract. The test employed the null hypothesis that the futures premiums were 0. Premiums were positive and varied between 3.7 per cent and 9.3 per cent. The purpose of the study was to determine whether risk premiums were present. Results showed that risk premiums varied over time. Two additional hypotheses were then investigated to examine whether the presence of outside speculators reduced risk premiums, and to see if a period of high prices and volatility caused more buyers to hedge in the futures market. Results showed that in the face of volatility and higher prices, consumers do not purchase fixed-price contracts which would ultimately increase futures premiums in the market. It was concluded that premiums are an important element in the pricing of Nord Pool futures and

Spikes and memory in (Nord Pool) electricity price spot prices

DEFF Research Database (Denmark)

Proietti, Tomasso; Haldrup, Niels; Knapik, Oskar

Electricity spot prices are subject to transitory sharp movements commonly referred to as spikes. The paper aims at assessing their effects on model based inferences and predictions, with reference to the Nord Pool power exchange. We identify a spike as a price value which deviates substantially...

Interfaces et reconfigurations de la question Nord/Sud en Corée.

Directory of Open Access Journals (Sweden)

Valérie Gelézeau

2010-12-01

Full Text Available S’appuyant sur un travail pluridisciplinaire autour de la notion d’interface, l’article propose de nouvelles perspectives d’analyse de la question Nord/Sud en Corée en considérant la partition entre Corée du Nord et Corée du Sud non plus comme un simple contexte géopolitique mais comme une matrice structurante des deux sociétés. Trois grands types d’interfaces entre les deux Corées sont identifiés et analysés à travers plusieurs études de cas : les interfaces spatiales (la frontière inter-coréenne, la frontière sino-nord-coréenne, ou encore les enclaves économiques développées au Nord par la Corée du Sud, les interfaces sociales (la communauté des Nord-Coréens au Sud, les élites sud-coréennes originaires du Nord, ou les échanges culturels nés de l’introduction au Sud de la peinture nord-coréenne, les interfaces narratives renvoyant aux discours que chaque Corée construit sur l’Autre, que ce soient les discours officiels (manuels scolaires, agences de presse ou ceux de la fiction (cinéma. Prolongeant le travail des géographes sur la notion, l’article s’efforce de mieux décrire la géométrie du système que constitue une interface (multiplicité des plans et des niveaux de contacts, jeu des synapses et des interstices, prégnance des enclaves non seulement sur le plan spatial mais aussi sur les plans social et narratif et de reconsidérer l’extraordinaire complexité de la culture coréenne contemporaine. Malgré les divergences de vues sur l’existence même d’une interface entre les deux Corées, l’article conclut que l’usage de ce concept a contribué à mettre en évidence la prégnance de cette division au cœur des deux Corées, à tous les niveaux de la sphère sociale et jusque dans le discours des études coréennes. En exposant les frontières divisant les discours et les savoirs sur la péninsule selon un paradigme bipolaire, le concept d’interface a pu permettre de

Operational experience from the satellite fields Statfjord Nord and East; Driftserfaringer fra satellittfeltene Statfjord Nord og Oest

Energy Technology Data Exchange (ETDEWEB)

Retterdal, Atle; Hansen, Hans Birger [Statoil, Stavanger (Norway)

1999-07-01

Since production started on the satellite fields Statfjord Nord and East in 1995 and 1994, respectively, some opportunities for improvement have been discovered and realized both with respect to the subsea systems and the operational routines and philosophy. This presentation discusses the improvement projects. It is known from experience that creative ideas usually originate at the interfaces between supplier/customer, engineers with different backgrounds, or between different technologies. The interface between supplier and operator is very important for discovering creative solutions. The interface between Statoil and the suppliers of underwater equipment is not sufficiently well developed on the operational side.

Nord Streami mõjudest rääkimine tõi auhinna / Madis Filippov

Index Scriptorium Estoniae

Filippov, Madis

2011-01-01

Tallinna Tehnikaülikooli juhtivteaduri Tarmo Soomere juhitud uurimisprojekt "Baltic Way" sai Läänemere organisatsioonide konsortsiumi Bonus auhinna Nord Streami võimalike keskkonnamõjude tutvustamise eest

Nord Stream liigub seatud eesmärgi poole / Sebastian Sass ; intervjueerinud Sirje Rank

Index Scriptorium Estoniae

Sass, Sebastian

2009-01-01

Nord Streami loataotluste juhi kinnitusel püsib gaasitoru projekt probleemidest hoolimata graafikus ja tarned peaksid algama 2011. aastal. Vt. samas: Finantsjuht: Läänemere gaasitoru rahata ei jää

Pb concentrations and isotope ratios of soil O and C horizons in Nord-Trøndelag, central Norway: Anthropogenic or natural sources?

International Nuclear Information System (INIS)

Reimann, C.; Fabian, K.; Flem, B.; Schilling, J.; Roberts, D.; Englmaier, P.

2016-01-01

Soil O and C horizon samples (N = 752) were collected at a sample density of 1 site/36 km"2 in Nord-Trøndelag and parts of Sør-Trøndelag (c. 25,000 km"2), and analysed for Pb and three of the four naturally occurring Pb isotopes ("2"0"6Pb, "2"0"7Pb and "2"0"8Pb) in a HNO_3/HCl extraction. Soil O and C horizons are decoupled in terms of both Pb concentrations and Pb isotope ratios. In the soil C horizon the Grong-Olden Culmination, a continuous exposure of the Precambrian crystalline basement across the general grain of the Caledonian orogen, is marked by a distinct "2"0"6Pb/"2"0"7Pb isotope ratio anomaly. No clear regional or even local patterns are detected when mapping the Pb isotope ratios in the soil O horizon samples. Variation in the isotope ratios declines significantly from the soil C to the O horizon. On average, Pb concentrations in the O horizon are four times higher and the "2"0"6Pb/"2"0"7Pb isotope ratio is shifted towards a median of 1.15 in comparison to 1.27 in the C horizon. It is demonstrated that natural processes like weathering in combination with plant uptake need to be taken into account in order to distinguish anthropogenic input from natural influences on Pb concentration and the "2"0"6Pb/"2"0"7Pb isotope ratio in the soil O horizon. - Highlights: • Lead concentrations are on average higher by a factor of 4 in the soil O than in the C horizon. • The "2"0"6Pb/"2"0"7Pb isotope ratio is considerably lower in the soil O than in the C horizon. • The observed shifts are in conflict with exclusive anthropogenic input of Pb. • The hypothesis of natural Pb-isotope invariance can not be hold.

Nord Streami keskkonnamõjude aruanne jätab tähelepanuta Läänemere eripära / Madis Filippov ; kommenteerinud Ivar Puura, Tarmo Soomere, Endel Lippmaa

Index Scriptorium Estoniae

Filippov, Madis

2009-01-01

Teadlastes tekitavad ärevust Vene-Saksa ühisfirma Nord-Streami poolt Läänemerre kavandatava gaasitoru keskkonnamõjud. Artiklis on juttu ka Eesti Teaduste Akadeemia kirjast president Toomas Hendrik Ilvesele ja peaminister Andrus Ansipile sooviga moodustada professionaalne komisjon, mis töötaks läbi Nord Streami gaasijuhtme keskkonnamõju hindamise materjalid. Vt. samas: Dioksiinide kontsentratsioon setetes; Nord Streami gaasijuhe

Culture, Values and Social Basis of Northern Italian Centrifugal Regionalism. A Contextual Political Analysis of the Lega Nord

OpenAIRE

Biorcio , Roberto; Vitale , Tommaso

2011-01-01

The Lega Nord intended to create a party which represented the whole of the northern regions, capable to defend their interests and culture. If we examine the profile of people that voted for the Lega Nord, we find some discordant features compared to the project. A large majority of the party’s electorate naturally supports federalism and devolution. However, the party’s electorate paradoxically displays value trends and convictions that, for many aspects are in countertendency compared to t...

Siempelkamp Nukleartechnik GmbH

International Nuclear Information System (INIS)

2011-01-01

Siempelkamp Nukleartechnik GmbH, which is headquartered in Krefeld (Germany), is at the forefront of the nuclear technology companies in the Siempelkamp group. With over 2,700 employees, Siempelkamp is a traditional family enterprise, and its individual divisions represent it as an internationally active industrial supplier in the markets of machinery and plants, nuclear technology, and foundry technology. (orig.)

The new pre-cataclysmic binary PG 2200+085

OpenAIRE

Shimansky, V.; Sakhibullin, N. A.; Bikmaev, I.; Ritter, H.; Suleimanov, V.; Borisov, N.; Galeev, A.

2006-01-01

We present the results of spectroscopic-- and orbit--sampled photometric observations of the faint UV-excess object PG 2200+085. The optical CCD photometry observations of this object were performed by the Russian-Turkish 1.5-meter telescope RTT150 at the TUBITAK National Observatory (Turkey). The long-slit optical spectroscopy observations with 2.6 A resolution were carried out by 6-meter telescope BTA at the Special Astrophysical Observatory (Russia). The photometric variations over two nig...

Interpretation of Leadership and Organizational Culture in PostNord

OpenAIRE

Hansen, Viktor Satterup Morell; Nissen, Peter Ravnborg; Pak, Kyeong Hwoa

2016-01-01

In this paper, there will be an interpretivist analysis of the organizational structure and leadership in PostNord, for the period of 2009 to 2016. The research attempts to disclose the espoused values and underlying assumption in the internal structure of the organization, and also the leadership of Lars G. Nordström, Lars Idermark and Håkan Ericsson. The theory will utilize Edgar H. Schein’s definition of organizational culture and leadership by Partington 3 schools of thought from project ...

NordStream : "Toru tuleb niikuinii" / Jens Müller ; interv. Külli-Riin Tigasson

Index Scriptorium Estoniae

Müller, Jens

2007-01-01

Nord Streami pressiesindaja hinnangul on Eesti majandusvööndis gaasijuhtme keskkonnauuringute mittelubamine keskkonna seisukohalt kahjulik, nüüd ei saa võrrelda, kas keskkonnasõbralikum oleks ehitada gaasitoru läbi Soome või läbi Eesti majandusvööndi

Réseautage d'entreprises au Moyen-Orient et en Afrique du Nord ...

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

Les réseaux sociaux sont d'importantes sources de conseils pour les entrepreneurs du Moyen-Orient et de l'Afrique du Nord (région MOAN) et ils contribuent à leur réussite. Un nouveau projet de recherche a pour but de favoriser la collaboration entre des chercheurs du Global Entrepreneurship Monitor (GEM) et la ...

NCBI nr-aa BLAST: CBRC-OANA-01-2200 [SEVENS

Lifescience Database Archive (English)

Full Text Available CBRC-OANA-01-2200 ref|NP_036916.1| cannabinoid receptor 1 (brain) [Rattus norvegicu...s] sp|P20272|CNR1_RAT Cannabinoid receptor 1 (CB1) (CB-R) (Brain-type cannabinoid receptor) emb|CAA39332.1| CB1 cann...abinoid receptor [Rattus norvegicus] gb|AAA99067.1| neuronal cannabinoid receptor gb|EDL98589.1| cann...abinoid receptor 1 (brain) [Rattus norvegicus] prf||1613453A cannabinoid receptor NP_036916.1 0.0 93% ...

Comparative study of air quality by the North Sea and Baltic Sea; Vergleichsuntersuchungen der Luftqualitaet an Nord- und Ostsee

Energy Technology Data Exchange (ETDEWEB)

Moriske, H.J.; Turowski, E.; Klar, A.; Schoendube, M.; Ebert, G.; Konieczny, L. [Umweltbundesamt, Berlin (Germany). Inst. fuer Wasser-, Boden- und Lufthygiene

2000-01-01

Air quality measurements were carried out in the North Sea and Baltic Sea regions. The results are summarized in this contribution from the hygienic view. [German] Im Rahmen eines Forschungsprojektes des Umweltbundesamtes, das zwischen 1996 und 1998 mit dem Titel 'Erfassung gasfoermiger und partikelfoermiger Bestandteile der Umgebungsluft an Nord- und Ostsee - Untersuchungen zur hygienischen Bedeutung des maritimen Aerosols' durchgefuehrt wurde, sollte die Frage unterschiedlicher Luftqualitaet an Nord- und Ostsee beantwortet werden und eine aktuelle Bestandsaufnahme vorgenommen werden. Der Artikel fasst die Forschungsergebnisse aus hygienischer Sicht zusammen. (orig./SR)

Consequences of the EU basic safety standards. Omission of the clearance for demolition/disposal with respect to the deconstruction projects of WAK GmbH

International Nuclear Information System (INIS)

Wittmann, S.

2013-01-01

The WAK GmbH's task is to decommission the nuclear installation projects at the KIT Campus Nord. These include the former Reprocessing Plant (WAK-Anlage), the Multi-purpose Research Reactor (MZFR), Research Reactor 2 (FR2), Compact Sodium-cooled Nuclear Reactor Facility (KNK), the Hot Cells (HZ) and some more small research facilities of the KIT. The buildings should be released by paragraph 29 German Radiation Protection Ordinance (StrlSchV) after the demolition of the process-engineering equipment. For this the clearance levels for 'demolition of buildings' Annex III Tab. 1 Column 10 (StrlSchV) must be reached, depth profiles were sampled on order to estimate how much material of the walls has to be removed to reach the values of the clearance levels. In a proposal (10926/12 ATO 90 SOC 501 SAN 149) on the basis of new scientific knowledge the EU plans to introduce clearance levels from the IAEA - ''Application of the Concepts of Exclusion, Exemption and Clearance RS-G-1.7''. In the proposal there are only clearance levels for an unrestricted release. Clearance levels for specific purpose (Annex III Tab. 1 Column 9a - 9d, 10 and 10a StrlSchV) are not named. A worst case scenario has been made what the possible effects are if the unrestricted release in the proposal of the basic safety standards from EU is guilty for every material. An estimation were done how much material and how much volume of building rubbish has to be removed to reach these new resulted clearance. Based on these volumes the caused additional financial costs for the final disposal for the WAK GmbH were calculated. (orig.)

SARDULUS SACERENSIS CASALE & MARCIA, NUOVA SPECIE IPOGEA DI COLEOTTERI ISTERIDI DELLA SARDEGNA NORD-OCCIDENTALE E SUA MORFOLOGIA LARVALE (Coleoptera, Histeridae

Directory of Open Access Journals (Sweden)

A. Casale

2006-10-01

Full Text Available Sardulus sacerensis Casale & Marcia, nuova specie di Histeridae ipogei della Grotta di Lu Gardu (Sassari, Sardegna nord-occidentale è descritta e comparata con le due specie note in precedenza della Sardegna centro-orientale, S. spelaeus Patrizi, 1955, e S. incrassatus Magrini & Fancello, 2005. Le caratteristiche morfologiche esternee i genitali maschili delle tre specie sono raffigurati. Inoltre, è fornita per la prima volta la descrizione della morfologia larvale di una specie di questo genere. S. spelaeus, specie nota fino ad ora di due grotte in territorio di Dorgali, è segnalata di una terza località: la Grotta di Istirzili o Stirzili, nel territorio di Baunei.

La coopération culturelle dans l’eurorégion Nord-Transmanche : une institutionnalisation sans institution ?

Directory of Open Access Journals (Sweden)

Thomas Perrin

2012-01-01

Full Text Available Cet article porte sur l’action culturelle transfrontalière dans l’eurorégion Nord-Transmanche. Cette organisation de coopération territoriale a associé, de 1991 à 2004, la région française du Nord-Pas-de-Calais au Comté anglais du Kent et aux trois régions belges : Région wallonne, Région flamande et Région de Bruxelles-Capitale. La dimension pionnière et historique de cette eurorégion, mais également le fait qu’elle n’a pas perduré, permettent d’illustrer à la fois les potentialités, limites et paradoxes de la mobilisation de la culture dans le contexte des organisations de coopération territoriale. Si le processus d’institutionnalisation de l’eurorégion en tant que telle est resté inachevé, l’espace Nord-Transmanche reste un espace de coopération dynamique, en particulier dans le domaine culturel et la référence eurorégionale reste significative pour de nombreux acteurs. Cet exemple interroge ainsi les enjeux et la réalité de la construction d’une Europe des territoires et de la culture, notamment par rapport aux discours institutionnels dont ces questions font généralement l’objet.

Moyen-Orient et Afrique du Nord | CRDI - Centre de recherches pour ...

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

Depuis les soulèvements de 2011, la région connaît des changements sans précédent. Cela a entraîné une croissance inégale, une vulnérabilité économique, une démocratie fragile et un taux de chômage élevé, en particulier chez les femmes et les jeunes. Au Moyen-Orient et en Afrique du Nord, les économies ...

Environmental remediation activities at WISMUT GmbH, Germany

International Nuclear Information System (INIS)

Saito, Hiroshi; Takahashi, Kuniaki; Miyasaka, Yasuhiko; Yamana, Hajimu

2007-01-01

The WISMUT GmbH has carried out environmental remediation activities since 1991 in former GDR (German Democratic Republic) to rehabilitate the environment and landscape which have been adversely affected by decades of unrestrained mining and processing of uranium ores. It is worthy of being mentioned especially that WISMUT GmbH's sites including waste rock dump, mill tailings pond, open pit mine and water treatment facilities with an area of 3,700ha have been rehabilitated practically and extensively, and these activities are planned to terminate in 2015 except for the water treatment. For safety assessment after remediation, the value of 1mSv/y (in excess of the background level) is applied to as an individual effective dose, from the recommendation of ICRP (International Commission on Radiological Protection). This report shows a summary of environmental remediation activities carried out by the WISMUT GmbH and related regulatory laws. (author)

Nord Stream : täidame kõik Eesti nõudmised / Matthias Warnig ; interv. Jan Jõgis-Laats

Index Scriptorium Estoniae

Warnig, Matthias

2007-01-01

Nord Streami tegevdirektor pakub võimalust, et Eesti esindajad viibiksid gaasitrassi uuringutel, samuti võivad esindajad teha ette teatamata reide. Firma on valmis arutama kõike, mis on vajalik protsessi kontrollimiseks ja usalduse tekitamiseks

Anomalous strength of the 2200 Angstroem feature in Cassiopeia-Taurus association

International Nuclear Information System (INIS)

Morales, C.; Ruiz del Arbol, J.A.; Llorente de Andres, F.

1980-01-01

From a large sample of reddened stars we computed the individual extinction curves which agree with that calculated by Nandy et al. (1976), except for four stars which show that the extinction at the 2200 Angstroem feature is greater than that deduced for the rest of stars. These four stars belong to the Cassiopeia-Taurus association. (orig.)

La population du Moyen-Orient et de l'Afrique du Nord contribue ...

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

29 avr. 2016 ... Le degré d'apport au contenu varie grandement d'une population à l'autre. Si les habitants du Moyen-Orient et de l'Afrique du Nord (région MENA) utilisent Wikipédia, ils y contribuent cependant moins que les populations d'autres régions du monde. Le contenu au sujet de la région MENA est, le plus ...

76 FR 54145 - Airworthiness Directives; 328 Support Services GmbH (Type Certificate Previously Held by AvCraft...

Science.gov (United States)

2011-08-31

... Services GmbH, Global Support Center, P.O. Box 1252, D-82231 Wessling, Federal Republic of Germany... of this AD introduce pre-flight operational tests of the warning system modification, along with abnormal procedures that provide guidance to the flightcrew in the event of various potential warning...

Evaluation of the BioPlex 2200 syphilis system as a first-line method of reverse-sequence screening for syphilis diagnosis.

Science.gov (United States)

Marangoni, Antonella; Nardini, Paola; Foschi, Claudio; Moroni, Alessandra; D'Antuono, Antonietta; Bacchi Reggiani, Letizia; Cevenini, Roberto

2013-07-01

Despite recent technological advances, the diagnosis of syphilis remains a challenging enterprise. Actually, most high-volume laboratories have adopted the "reverse algorithm" due several factors, including the potential to automate testing. Recently, immunoassays processed on random-access systems have been proposed as screening tests. The purpose of this study was to evaluate diagnostic performances of BioPlex 2200 Syphilis IgG and BioPlex 2200 Syphilis IgM, tests based on Multiplex Flow technology, in comparison with the performance of Architect Syphilis TP, a chemiluminescent immunoassay for the detection of IgG and/or IgM anti-Treponema pallidum antibodies. A retrospective study was performed with a panel of 100 blood donor sera, a panel of 350 clinical and laboratory-characterized syphilitic sera, and 170 samples obtained from subjects with potentially interfering conditions. Moreover, 200 unselected samples submitted to the Microbiology Laboratory of St. Orsola Hospital in Bologna for routine screening for syphilis were evaluated. As confirmatory tests, T. pallidum hemagglutination and Western blot assays were used. Considering the IgG Western blot (WB) assay to be the gold standard method, BioPlex 2200 Syphilis IgG specificity was far higher than Architect Syphilis TP specificity (89.7% versus 78.4%, respectively), whereas the sensitivity was 100% for both automated methods. Compared to the IgM WB assay, BioPlex 2200 Syphilis IgM performed with a specificity of 94.9%, whereas the sensitivity was 84.8%. Considering the excellent ease of use and automation, the high sample throughput and its valuable analytical performances, BioPlex Syphilis 2200 IgG could represent a suitable choice for high-volume laboratories. BioPlex Syphilis 2200 IgM could be considered a good addition to IgG testing for uncovering active infections.

47 CFR 101.77 - Public safety licensees in the 1850-1990 MHz, 2110-2150 MHz, and 2160-2200 MHz bands.

Science.gov (United States)

2010-10-01

..., 2110-2150 MHz, and 2160-2200 MHz bands. 101.77 Section 101.77 Telecommunication FEDERAL COMMUNICATIONS...-1990 MHz, 2110-2150 MHz, and 2160-2200 MHz bands. (a) In order for public safety licensees to qualify... a Police licensee, a Fire Licensee, or an Emergency Medical Licensee as defined in § 90.7 of this...

Environnement alimentaire de la vente au détail et expériences de magasinage dans les collectivités des Premières nations du nord des provinces

Directory of Open Access Journals (Sweden)

Kristin Burnett

2017-01-01

Full Text Available Introduction : Cet article porte sur l'environnement de la vente d’aliments dans les collectivités des Premières nations du nord des provinces, en particulier sur la concurrence éventuelle dans la vente au détail de la North West Company (NWC ainsi que sur les expériences d'achats alimentaires de la population vivant dans le Nord canadien. Méthodologie : Nous avons utilisé deux méthodologies pour évaluer l’environnement alimentaire de la vente au détail dans le Nord. D’abord, nous avons cartographié les détaillants en alimentation du Nord afin d’examiner le degré de concurrence au détail dans les régions nordiques, en prêtant une attention particulière aux collectivités qui ne sont pas accessibles à l’année par la route. Ensuite, nous avons enquêté auprès des personnes vivant dans les collectivités du Nord canadien à propos de leurs expériences d’achat au détail et de magasinage. Résultats : Cinquante‑quatre pour cent des collectivités du nord des provinces et du Grand Nord n’avaient aucune épicerie en concurrence avec la NWC. Les provinces comptant les plus fortes proportions de collectivités nordiques sans concurrence dans la vente au détail étaient l’Ontario (87 %, la Saskatchewan (83 % et le Manitoba (72 %. Les participants au sondage (n = 92 ont fait état de leurs préoccupations quant à leurs expériences d'achat dans trois grands secteurs : le coût des aliments, la qualité et la fraîcheur des aliments et la disponibilité de certains aliments. Conclusion : La concurrence dans la vente au détail est limitée dans le nord des provinces. Au Manitoba, en Saskatchewan et en Ontario, la NWC ne fait face à aucune concurrence dans au moins 70 % des collectivités nordiques. Les consommateurs du Nord canadien considèrent que les aliments nutritifs sont peu abordables, et ils souhaitent avoir accès à un plus grand choix d’aliments périssables en bon état.

NORD STREAM 2 and its Soft Power – an Unfolding Playground for the European Union

Directory of Open Access Journals (Sweden)

Roxana Ioana Banciu

2016-06-01

Full Text Available This paper focuses on the Nord Stream 2 pipeline in a double reflection (Russia - the candle, Germany - the mirror handling one particular aspect that influences Russia-EU relations since the Ukrainian factor emerged as a playground for both East and West tectonic plates - namely the energy sector. It is vital for any global power to understand this approach in order to reach people’s minds, in order to emerge as leaders on the world map and to build a strong perception over a political scene. A recently debated subject is Nord Stream 2. The reason why I have chosen to explore this subject is because I am very interested in how Kremlin seeks to have an exclusive control over Eastern Europe, given the full debate in the last three years. In this thesis I will also discuss some important elements of the Russian Soft Power over Europe introducing the plot of South Stream project.

Prevalence and associated factors of DSM-V insomnia in Norway: the Nord-Trøndelag Health Study (HUNT 3).

Science.gov (United States)

Uhlig, Benjamin Langsæter; Sand, Trond; Odegård, Siv Steinsmo; Hagen, Knut

2014-06-01

Many studies have assessed the prevalence of insomnia, but the influence of non-participants has largely been ignored. The objective of the present study was to estimate the prevalence and associated factors of insomnia in a large adult population using DSM-V (diagnostic and statistical manual of mental disorders, 5th ed.) criteria, also taking non-participants into account. This cross-sectional study used data from a questionnaire in The Nord-Trøndelag Health Study (HUNT 3) performed in 2006-2008, and a subsequent non-participant study. The total adult population (n=93,860 aged > or =20 years) of Nord-Trøndelag County, Norway, was invited. Of these, 40,535 responded to the insomnia questionnaire. Among 42,024 eligible non-participants, 6918 (17%) responded to two insomnia questions. Insomnia was diagnosed by applying modified DSM-V criteria. The age-adjusted insomnia prevalence was estimated using the age distribution of all adult inhabitants of Nord-Trøndelag. Supplementary prevalence data were estimated by extrapolating data from the non-participant study. Additionally, the association between insomnia and self-reported health was estimated, adjusting for known confounders. The total age-adjusted prevalence of insomnia was 7.1% (95% confidence interval [CI], 6.9-7.4) (8.6% for women, 5.5% for men). Adjusting for non-participants, the prevalence estimate changed to 7.9% (95% CI, 7.3-8.6) (9.4% for women, 6.4% for men). Insomnia was more than eight times more likely (OR, 8.3; 95% CI, 6.2-11.1) among individuals with very poor versus very good self-reported health, adjusting for age, gender, employment status, chronic musculoskeletal complaints, anxiety and depression. The adjusted insomnia prevalence estimate in Nord-Trøndelag was 7.9%. Insomnia was strongly associated with poor self-reported health. Copyright © 2014 Elsevier B.V. All rights reserved.

Commercial mitigation techniques used in remediating a 2200 pCi/L public building

International Nuclear Information System (INIS)

Davidson, J.G.

1990-01-01

This paper reports on commercial mitigation techniques used in remediating a 2200 pCi/L public building. In March of 1989 EPA and Pa. DER officials were amazed to discover a school in Pennsylvania with levels in its library of 2200 pCi/L. The library was a 30 year old, three story slab-on-grade structure more like a commercial building than a typical school structure. It had three separate and complex HVAC systems. Initial diagnostics indicated radon levels under the slab at over 80,000 pCi/L. Further investigations revealed major entry routes and a HVAC system terribly out of balance. Remediation consisted of installing a complex sub-slab depressurization system with an exterior commercial fan unit, major entry route sealing, and working closely with a mechanical contractor to bring the HVAC systems back into balance. Initial post remediation testing showed a 99% drop in radon levels. Refinements to the system are still in progress

Nonlocal relativistic diffusion (NoRD) model of cosmic ray propagation

International Nuclear Information System (INIS)

Uchaikin, V V; Sibatov, R T

2017-01-01

The problem of physical interpretation of the nonlocal relativistic diffusion (NoRD model) for cosmic ray transport in the Galaxy is discussed. The model accounts for the turbulent character of the interstellar medium and the relativistic principle of the speed limitation. Involving fractional calculus and non-Gaussian Lévy statistics yields numerical results compatible with observation data. A special attention is paid to the knee problem. The relativistic speed limit requirement steepens theoretical background spectrum at certain energies, and the position of the break, its sharpness and slopes of asymptotes depend on D α ( E ) and α . (paper)

Karst et ressources en eau au moyen Atlas nord-oriental

OpenAIRE

Taous, Ali; Tribak, Abdellatif; Obda, Khalid; Baena Escudero, Rafael; López Lara, Enrique Javier; Miranda Bonilla, Jose

2009-01-01

Le Moyen Atlas nord-oriental se caractérise par des paysages kartisques hérités et actuels très diversifiés. En fait, les roches carbonatées du Jurassique, bien représentées dans cette région montagneuse, ont subi une karstification ancienne, depuis la fin du Tertiaire et au cours du Quaternaire. Actuallement, la karstogenèse est encore active en raison des conditions géologiques, morphostructurales et bioclimatiques favorables: couches de roches carbonatées inclinées et plissées, climat médi...

NKS NordRisk. Atlas of long-range atmospheric dispersion and deposition of radionuclides from selected risk sites in the Northern Hemisphere

International Nuclear Information System (INIS)

Havskov Soerensen, J.; Baklanov, A.; Mahura, A.; Lauritzen, Bent; Mikkelsen, Torben

2008-07-01

Within the NKS NordRisk project, 'Nuclear risk from atmospheric dispersion in Northern Europe', the NKS NordRisk Atlas has been developed. The atlas describes risks from hypothetical long-range atmospheric dispersion and deposition of radionuclides from selected nuclear risk sites in the Northern Hemisphere. A number of case studies of long-term long-range atmospheric transport and deposition of radionuclides has been developed, based on two years of meteorological data. Radionuclide concentrations in air and radionuclide depositions have been evaluated and examples of long-term averages of the dispersion and deposition and of the variability around these mean values are provided. (au)

LE FRANÇAIS DANS LA PRESSE ECRITE DU NORD-CAMEROUN : DIAGNOSTIC, CRITIQUES ET ORIENTATIONS

Directory of Open Access Journals (Sweden)

Moïse MBEY MAKANG

2013-11-01

Full Text Available La présente réflexion tire son origine de la crise linguistique observée au sein de la presse écrite du Nord-Cameroun. Celle-ci fait échos des irrégularités de la langue de Voltaire dans la presse écrite de cette partie du pays. De plus en plus, on y assiste à une émergence des déviances syntaxiques et une profusion des écarts langagiers à connotation dépréciative. L’indécence verbale de la société, la mauvaise prestation des élèves en classe et lors des examens officiels en sont des indicateurs pertinents. Il est important de mentionner que la cohabitation entre les langues camerounaises et le français, la sous-scolarisation et ou l’ignorance, le laxisme des rédacteurs en chef, etc. sont les mobiles profonds de cette incorrection. Pourtant, nous savons tous que les media sont une forteresse où la langue doit être préservée de toute entorse et représentent un modèle pour la société. Néanmoins, des traits caractéristiques du français de la presse écrite du Nord-Cameroun s’inscrivent en faux par rapport à cette vocation naturelle des media. Dès lors, la question que nous pouvons nous poser est celle de savoir si ces mobiles ci-dessus cités sont des éléments qui favorisent l’émergence de cette dialectalisation du français. En clair qu’est-ce qui caractérise le français des journalistes? Quelle est la structure morphosyntaxique du français des rédacteurs des journaux? S’agit-il d’un français conforme à une norme locale ou (y retrouvons-nous des énoncés exogènes ? Quel type de morphosyntaxe utilisent les rédacteurs ? Une morphosyntaxe endogène, morphosyntaxe qui leur est propre, ou plutôt une morphosyntaxe exogène, supposée unique à tous les francophones ? Peut-on parler d’alternance codique, d’argotisation, ou de créolisation ? La présente analyse a pour ambitions de s’interroger sur les mobiles profonds qui incitent des journalistes à s’écarter de la norme du fran

NKS NordRisk. Atlas of long-range atmospheric dispersion and deposition of radionuclides from selected risk sites in the Northern Hemisphere

Energy Technology Data Exchange (ETDEWEB)

Havskov Soerensen, J.; Baklanov, A.; Mahura, A. (Danish Meteorological Institute, Copenhagen (Denmark)); Lauritzen, Bent; Mikkelsen, Torben (Technical Univ. of Denmark, Risoe National Lab. for Sustainable Energy, Roskilde (Denmark))

2008-07-15

Within the NKS NordRisk project, 'Nuclear risk from atmospheric dispersion in Northern Europe', the NKS NordRisk Atlas has been developed. The atlas describes risks from hypothetical long-range atmospheric dispersion and deposition of radionuclides from selected nuclear risk sites in the Northern Hemisphere. A number of case studies of long-term long-range atmospheric transport and deposition of radionuclides has been developed, based on two years of meteorological data. Radionuclide concentrations in air and radionuclide depositions have been evaluated and examples of long-term averages of the dispersion and deposition and of the variability around these mean values are provided. (au)

L'avenir du Moyen-Orient et de l'Afrique du Nord passe par la ...

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

10 janv. 2013 ... Centre de recherches pour le développement international Gouvernement du Canada ... du Nord passe par la croissance partagée et l'économie de marché ... vivant en région éloignée aient un accès égal aux possibilités économiques. ... visant à trouver de nouveaux modes d'action pouvant contribuer au ...

Nord Stream on väljakutse kodanikuühiskonnale / Tarmo Soomere ; üles kirjutanud Juune Holvandus

Index Scriptorium Estoniae

Soomere, Tarmo, 1957-

2009-01-01

Gaasijuhe Nord Stream läbi Läänemere Venemaalt Saksamaale ei tähenda ainult kasulikku äritehingut. Küsimus on ennekõike ohutust keskkonnast ja sellest, et riigid peavad kaaluma ka seda, mida järeltulevad põlved asjast arvavad. Akadeemik Tarmo Soomere selgitab rahvusvahelistesse vetesse rajatava gaasijuhtme temaatikat.

78 FR 66666 - Airworthiness Directives; Diamond Aircraft Industries GmbH Airplanes

Science.gov (United States)

2013-11-06

...., Washington, DC 20590, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. For service... Aircraft Industries GmbH has issued Mandatory Service Bulletin No. MSB 42NG-003/12; Mandatory Service... Accomplishment/ Instructions section of Diamond Aircraft Industries GmbH Mandatory Service Bulletin No. MSB 42NG...

Living better in Nord-Pas de Calais region. For an energy turn and societal transformations - Full report, Synthesis

International Nuclear Information System (INIS)

2015-12-01

In 2008, the NGO Virage-energie Nord-Pas de Calais published a scenario of nuclear power phaseout including objectives of reduction of green gas emissions in the region of Nord-Pas de Calais. In 2013, Virage-energie Nord-Pas de Calais published Scenarios on energy sufficiency and societal transformations: the results of a research project on the evaluation of energy savings potentials from public policies and lifestyle changes. Using data models and assumptions, this study has highlighted that energy sufficiency could generate energy savings from 26 % to 40 %. Global scenarios presented in this report, realised with the financial support of ADEME and regional council of the region Nord-Pas de Calais in partnership with two academic laboratories (TVES, University of Lille 1 - Science and Technologies; and Ceraps, University of Lille 2 - Health and Law), complete previous works with a global vision for the future energetic and social systems. Scenarios explore interactions between energy, lifestyles, agriculture, food habits, consumer goods, industry, buildings, transport and employment, in order to identify and to reduce human, social, economic and environmental vulnerabilities to energetic crisis. Energy sufficiency and resilience are at the heart of this research. Energy sufficiency is a voluntary and organized strategy to reduce energy consumption through lifestyles changes and societal transformations. Energy sufficiency is different from energy efficiency, which concerns only improvement of technical performances in order to reduce energy consumption of a system (building, vehicle, etc.). Sufficiency re-evaluates uses and needs of energy, but also imaginary and culture of a society and its individual and collective organisations. Resilience is the capacity for a system (territory, population, etc.) to absorb a perturbation, to reorganize itself and to continue to remain in a functionally similar state. Through three possible scenarios for the territory and the

La integración energética de los países nórdicos -Nord Pool-: lecciones para otros mercados

Directory of Open Access Journals (Sweden)

John Jairo García Rendón

2006-01-01

Full Text Available Este artículo describe el proceso de integración del mercado eléctrico de los países nórdicos -Nord Pool-, además de establecer algunas reflexiones sobre dicha experiencia, las cuales pueden ser importantes para regiones que se encuentran en el mismo proceso, como es el caso de la Comunidad Andina de Naciones -CAN-. Inicialmente hace alusión a la teoría que fundamenta el intercambio de bienes y servicios y los principios económicos que justifican la integración de mercados para luego concentrarse en el caso del Nord Pool, examinando el proceso y sus principales resultados.

4 years of successful knowledge transfer - the nuclear technology training center of the TUeV Nord Group

International Nuclear Information System (INIS)

Willenbockel, I.; Tietze, U.

2007-01-01

In connection with the 2002 amendment to the German Atomic Energy Act, the topics of generational change and maintenance of competence grew in importance and necessitated new solution approaches. To this end, various activities were launched, with the aim of conducting conceptual analyses of these topics. Examples include the 'National Competence Network for Nuclear Technology' (Nationaler Kompetenzverbund fuer Kerntechnik), various networks established by colleges and universities, the 'Knowledge Management for the Maintenance and Transfer of Competence in Reactor Safety' (Wissensmanagement zum Kompetenzerhalt und -transfer in der Reaktorsicherheit) workshop held in 2001 in Garching near Munich (Germany) and the 'Ad-hoc Workgroup on the Maintenance of Competence' (Ad-hoc-Arbeitskreis Kompetenzerhalt) of the VdTUeV. The nuclear technology departments of the TUeV Nord Group were aware of te challenges associated with the generational change early on. By establishing the 'Nuclear Technology Training Center' (Ausbildungszentrum fuer Kerntechnik, AfK), the TUeV Nord Group intended to ensure the required knowledge transfer during the generational change as well as maintain the renowned high qualification as regards the subject of nuclear technology and thus continue to provide - in the sense of social responsibility - crucial contribution to the long-term safety of nuclear plants. Four years have passed since the training center held the first courses in the fall of 2002. Up to now, more than 350 participants have been trained in the courses conducted by the AfK. In the opinion of the TUeV Nord Group, the activities of the AfK have laid the foundation for a successful change of generations within the group's nuclear technology organizations. (orig.)

Nord Stream ei näe takistusi Eesti käest uuringuloa saamisel / Jan Jõgis-Laats

Index Scriptorium Estoniae

Jõgis-Laats, Jan

2007-01-01

Vene-Saksa gaasijuhet rajava Nord Streami piirkonnajuhi Sebastian Sassi sõnul on ettevõte täitnud kõik nõuded ja esitanud kogu nõutud info ning seetõttu usub, et uuringuteks saadakse Eestilt luba. Välisminister Urmas Paeti väitel saab valitsus selgete ja kaalukate argumentide korral uuringute loa andmisest keelduda. Lisa: Teadlased soovitavad keelduda

Réduction de la vulnérabilité des pasteurs du nord du Kenya | CRDI ...

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

21 avr. 2011 ... Les recherches menées par l'ONG kényane Practical Action sur la vulnérabilité climatique des communautés pastorales des districts de Mandera et de Turkana, dans le nord du pays, jette de la lumière sur les conséquences biophysiques, sociales et économiques de la sécheresse dans ces régions ...

78 FR 26241 - Airworthiness Directives; Diamond Aircraft Industries GmbH Powered Gliders

Science.gov (United States)

2013-05-06

... p.m., Monday through Friday, except Federal holidays. For service information identified in this AD... We reviewed Diamond Aircraft Industries GmbH Mandatory Service Bulletin MSB 36-108, dated February 28... Industries GmbH Mandatory Service Bulletin MSB 36-108 and Diamond Aircraft [[Page 26243

ASCA and Contemporaneous Ground-based Observations of the BL Lacertae Objects 1749+096 and 2200+420 (BL Lac)

International Nuclear Information System (INIS)

Sambruna, R.M.; Ghisellini, G.; Hooper, E.; Kollgaard, R.I.; Pesce, J.E.; Urry, C.M.

1999-01-01

We present ASCA observations of the radio-selected BL Lacertae objects 1749+096 (z=0.32) and 2200+420 (BL Lac, z=0.069) performed in 1995 September and November, respectively. The ASCA spectra of both sources can be described as a first approximation by a power law with photon index Γ∼2. This is flatter than for most X-ray endash selected BL Lacs observed with ASCA, in agreement with the predictions of current blazar unification models. While 1749+096 exhibits tentative evidence for spectral flattening at low energies, a concave continuum is detected for 2200+420: the steep low-energy component is consistent with the high-energy tail of the synchrotron emission responsible for the longer wavelengths, while the harder tail at higher energies is the onset of the Compton component. The two BL Lacs were observed with ground-based telescopes from radio to TeV energies contemporaneously with ASCA. The spectral energy distributions are consistent with synchrotron self-Compton emission from a single homogeneous region shortward of the IR/optical wavelengths, with a second component in the radio domain related to a more extended emission region. For 2200+420, comparing the 1995 November state with the optical/GeV flare of 1997 July, we find that models requiring inverse Compton scattering of external photons provide a viable mechanism for the production of the highest (GeV) energies during the flare. In particular, an increase of the external radiation density and of the power injected in the jet can reproduce the flat γ-ray continuum observed in 1997 July. A directly testable prediction of this model is that the line luminosity in 2200+420 should vary shortly after (∼1 month) a nonthermal synchrotron flare. copyright copyright 1999. The American Astronomical Society

Nord-Cotentin radioecology group: an innovative experiment in pluralist expertise; Le groupe Radioecologie Nord-Cotentin: une experience originale d'expertise pluraliste

Energy Technology Data Exchange (ETDEWEB)

Lochard, J.; Schneider, T.; Crouail, P. [Centre d' Etude sur l' Evaluation de la Protection dans le Domaine Nucleaire, 92 - Fontenay-aux-Roses (France); Heriard-Dubreuil, G.; Gadbois, S. [Mutadis, 92 - Fontenay aux Roses (France); Oudiz, A. [CEA Fontenay-aux-Roses, 92 (France). Inst. de Protection et de Surete Nucleaire

2000-11-01

This report gives a synthetic overview of the procedure and the main results of the GRNC (Nord-Cotentin Radioecology Group), and lessons that can be drawn from it. In particular, it is intended to demonstrate the innovation of the pluralist approach adopted by summarizing its historic context and differences with the similar experiment carried out in the United Kingdom for the Sellafield nuclear site 1. It also presents the different steps in the evaluation of exposures and risks associated with ionising radiation. Finally, it emphasizes prospects opened as a result of the Group's experiment on the involvement of stakeholders in the evaluation and management of radiological risk. This final aspect could open up new means of ''preventively'' dealing with questions related to risks to health and the environment inherent to industrial activities. (A.L.B.)

German repository engineering in international markets. DBE TECHNOLOGY GmbH success story

Energy Technology Data Exchange (ETDEWEB)

Berlepsch, Thilo v.; Krone, Juergen [DBE Technology GmbH, Peine (Germany); Biurrun, Enrique

2015-10-15

DBE TECHNOLOGY GmbH was founded in 2000 as a spin-off from the Technology and Development Division of DBE, the German Company for the Construction and Operation of Repositories for Wastes. Today, 15 years later, DBE TECHNOLOGY GmbH can draw upon a tremendous amount of experience and knowledge, which goes far beyond the planning and operation of Deep Geologic Repositories and the development of technologies for the disposal of radioactive waste. The capabilities of DBE TECHNOLOGY GmbH are presented by leading through its history, describing its roots and highlighting main projects the company has been involved in.

La integración energética de los países nórdicos —Nord Pool—: lecciones para otros mercados

Directory of Open Access Journals (Sweden)

Carlos Mario Palacios

2006-06-01

Full Text Available Este artículo describe el proceso de integración del mercado eléctrico de los países nórdicos —Nord Pool—, además de establecer algunas reflexiones sobre dicha experiencia, las cuales pueden ser importantes para regiones que se encuentran en el mismo proceso, como es el caso de la Comunidad Andina de Naciones —CAN—. Inicialmente hace alusión a la teoría que fundamenta el intercambio de bienes y servicios y los principios económicos que justifican la integración de mercados para luego concentrarse en el caso del Nord Pool, examinando el proceso y sus principales resultados.

Highlights from the CERN/ESO/NordForsk ''Gender in Physics Day''

Science.gov (United States)

Primas, F.; Guinot, G.; Strandberg, L.

2017-03-01

In their role as observers on the EU Gender Equality Network in the European Research Area (GENERA) project, funded under the Horizon 2020 framework, CERN, ESO and NordForsk joined forces and organised a Gender in Physics Day at the CERN Globe of Science and Innovation. The one-day conference aimed to examine innovative activities promoting gender equality, and to discuss gender-oriented policies and best practice in the European Research Area (with special emphasis on intergovernmental organisations), as well as the importance of building solid networks. The event was very well attended and was declared a success. The main highlights of the meeting are reported.

Ferrié Jean-Noël et Santucci Jean-Claude (dir., Dispositifs de démocratisation et dispositifs autoritaires en Afrique du Nord, CNRS Editions, 2006, 196 p.

Directory of Open Access Journals (Sweden)

Lahouari Addi

2009-05-01

Full Text Available Voici un ouvrage de science politique des États Nord Africains dense, cohérent et remarquablement homogène, compte-tenu de son caractère collectif. Composé de sept contributions couvrant le Maroc, l’Algérie, la Tunisie et l’Egypte, il débute sur une substantielle introduction, où les coordinateurs esquissent le cadre théorique de la construction de l’objet de la science politique dans cette région. Ils évoquent avec raison les analyses produites par le CRESM (Centre de recherches et d’études ...

78 FR 52872 - Airworthiness Directives; 328 Support Services GmbH (Type Certificate Previously Held by AvCraft...

Science.gov (United States)

2013-08-27

... Services GmbH (Type Certificate Previously Held by AvCraft Aerospace GmbH; Fairchild Dornier GmbH; Dornier... certain 328 Support Services GmbH (Type Certificate Previously Held by AvCraft Aerospace GmbH; Fairchild... send any written relevant data, views, or arguments about this proposed AD. Send your comments to an...

Source apportionment of particles at Station Nord, North East Greenland during 2008–2010 using COPREM and PMF analysis

DEFF Research Database (Denmark)

Nguyen, Quynh; Skov, Henrik; Sørensen, Lise Lotte

2013-01-01

In order to develop strategies for controlling and reducing Arctic air pollution, there is a need to understand the basic mechanisms for determining the fate of air pollution in the Arctic. Sources of atmospheric particles at Station Nord (81° 36' N, 16° 40' W) in North East Greenland were...... evaluated for a two-year period from March 2008 to February 2010. Source apportionment using Positive Matrix Factorization (PMF) and COnstrained Physical REceptor Model (COPREM) was based on measurements of black carbon, elements (Al, Si, S, K, Ca, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, Ga, As, Se, Br, Rb, Sr, Zr...... origins. Another anthropogenic source was characterised by high concentrations of Pb and As, which has been historically referred to as a Combustion source at Station Nord. The impacts of large-scale industry in Siberia, Russia were evident through high Cu concentrations in both the Combustion source...

Modeling and forecasting electricity price jumps in the Nord Pool power market

DEFF Research Database (Denmark)

Knapik, Oskar

extreme prices and forecasting of the price jumps is crucial for risk management and market design. In this paper, we consider the problem of the impact of fundamental price drivers on forecasting of price jumps in NordPool intraday market. We develop categorical time series models which take into account......For risk management traders in the electricity market are mainly interested in the risk of negative (drops) or of positive (spikes) price jumps, i.e. the sellers face the risk of negative price jumps while the buyers face the risk of positive price jumps. Understanding the mechanism that drive...

Répercussions de la chute du mur de Berlin sur des conflits nationalistes : Pays Basque et Irlande du Nord

Directory of Open Access Journals (Sweden)

Pascal Pragnère

2012-11-01

Full Text Available La chute du mur de Berlin et l’effondrement des régimes communistes eurent pour effet de discréditer et affaiblir de nombreux mouvements révolutionnaires, et de provoquer l’émergence ou la résurgence de mouvements nationalistes.En 1989-90, deux conflits violents faisaient rage au cœur de l’Europe occidentale démocratique, en Irlande du Nord et au Pays Basque.Dans ces deux territoires, des nationalistes, dont certains étaient des radicaux animés par des revendications nationalistes et révolutionnaires s’opposèrent à des états démocratiques par l’utilisation de la violence. Un processus de paix se développa à partir de 1998 en Irlande du Nord ; celui du Pays Basque est toujours dans l’impasse.Il semble au premier abord que ces conflits continuèrent sans bouleversement majeur dans la période qui suivit la chute du mur.Cet article examine les revendications des nationalistes en Irlande du Nord et au Pays Basque pour tenter de dévoiler dans quelle mesure ils furent affectés par ce choc historique.Une perspective comparative permet de comprendre que ces mouvements furent influencés différemment en fonction des contextes locaux. Certains acteurs politiques restèrent volontairement imperméables, alors que d’autres furent davantage affectés par le débat idéologique.

NKS NordDSS - report from workshop on the use of Decision Support Systems

Energy Technology Data Exchange (ETDEWEB)

Dyve, J.E. (Norwegian Radiation Protection Authority (Norway))

2010-03-15

Nuclear preparedness and response authorities in the Nordic countries are using decision support systems (DSS) as part of their operational capability. A DSS compile, display and analyse data that makes up the current and future radiological state of an emergency. ARGOS and RODOS are the two most common systems in use in the Nordic region. The aim of of the NordDSS workshop was to gather Nordic and international experts on DSS, and share knowledge and experience. The workshop brought together 22 experts for two days in Copenhagen. (author)

NKS NordDSS - report from workshop on the use of Decision Support Systems

International Nuclear Information System (INIS)

Dyve, J.E.

2010-03-01

Nuclear preparedness and response authorities in the Nordic countries are using decision support systems (DSS) as part of their operational capability. A DSS compile, display and analyse data that makes up the current and future radiological state of an emergency. ARGOS and RODOS are the two most common systems in use in the Nordic region. The aim of of the NordDSS workshop was to gather Nordic and international experts on DSS, and share knowledge and experience. The workshop brought together 22 experts for two days in Copenhagen. (author)

Etude comparative de la rentabilité de deux types d'apiculture au nord ouest du Cameroun

NARCIS (Netherlands)

Tsafack Matsop, A.S.; Muluh Achu, G.; Kamajou, F.; Ingram, V.; Vabi Boboh, M.

2011-01-01

La présente étude examine la rentabilité financière de l’apiculture au Cameroun. Son objectif global est de comparer la rentabilité des deux types d’apiculture pratiqués au Nord Ouest Cameroun. L’hypothèse globale est qu’il existerait une différence significative en rendement de miel et en bénéfice

FRAMES – oversvømmelseshåndtering i Nordsøregionen

DEFF Research Database (Denmark)

Thomsen, Mie; Andersen, Kaiija J.; Sørensen, Carlo Sass

2017-01-01

alternativer til den klassiske oversvømmelses-beskyttelse, der er både bekostelig og pladskrævende. Nogle alternativer, der fremkommer gennem konceptet Multi-Layer Safety (MLS) er forebyggelse, mitigation gennem fysisk planlægning og genopretning af ramte områder. Vi præsenterer EU Interreg North Sea Region......-projektet ’Flood Resilient Areas by Multi-layEred Safety’ (FRAMES), 2016-2019, der anvender dette koncept som udgangspunkt til at håndtere oversvømmelse og klimaændringer i nordsøregionen. Gennem FRAMES undersøger partnerne, hvordan lokalsamfund og kommuner arbejder med og håndterer en oversvømmelseshændelse før...

Nord stream: not just a pipeline. An analysis of the political debates in the Baltic Sea region regarding the planned gas pipeline from Russia to Germany

Energy Technology Data Exchange (ETDEWEB)

Whist, Bendik Solum

2008-11-15

This report is an analysis of the planned gas pipeline from Russia to Germany through the Baltic Sea known as Nord Stream. Although not yet realised, the project has, since its birth, been the subject of harsh criticism and opposition by a significant number of states that consider themselves affected by the pipeline. Whereas the Baltic States and Poland have interpreted the pipeline as a politically motivated strategy that will increase Russia's leverage on them and threaten their energy security, the debate in Sweden was at first mostly concerned with the prospect of increased Russian military presence in the Swedish Exclusive Economic Zone. The potential environmental impact of the pipeline has been, and continues to be, an overarching concern shared by all the littoral states of the Baltic Sea. Proponents of Nord Stream, most notably Germany, Russia and the Nord Stream consortium, have largely dismissed the concerns as unwarranted and argue that the pipeline is a common European project that all EU-members should embrace, as it will provide much-needed gas to an increasingly energy-thirsty union. This report is an extensive study of the divergent attitudes and debates that have surged in the region regarding Nord Stream, and the aim is to provide plausible explanations as to why the interpretations of the project have been so different in the various states. The report is based on a variety of sources, including several first-hand interviews with researchers and government officials in the Baltic Sea region. (author). refs.,fig.,tabs

Nord stream: not just a pipeline. An analysis of the political debates in the Baltic Sea region regarding the planned gas pipeline from Russia to Germany

Energy Technology Data Exchange (ETDEWEB)

Whist, Bendik Solum

2008-11-15

This report is an analysis of the planned gas pipeline from Russia to Germany through the Baltic Sea known as Nord Stream. Although not yet realised, the project has, since its birth, been the subject of harsh criticism and opposition by a significant number of states that consider themselves affected by the pipeline. Whereas the Baltic States and Poland have interpreted the pipeline as a politically motivated strategy that will increase Russia's leverage on them and threaten their energy security, the debate in Sweden was at first mostly concerned with the prospect of increased Russian military presence in the Swedish Exclusive Economic Zone. The potential environmental impact of the pipeline has been, and continues to be, an overarching concern shared by all the littoral states of the Baltic Sea. Proponents of Nord Stream, most notably Germany, Russia and the Nord Stream consortium, have largely dismissed the concerns as unwarranted and argue that the pipeline is a common European project that all EU-members should embrace, as it will provide much-needed gas to an increasingly energy-thirsty union. This report is an extensive study of the divergent attitudes and debates that have surged in the region regarding Nord Stream, and the aim is to provide plausible explanations as to why the interpretations of the project have been so different in the various states. The report is based on a variety of sources, including several first-hand interviews with researchers and government officials in the Baltic Sea region. (author). refs.,fig.,tabs

Nord-Cotentin radioecology group: an innovative experiment in pluralist expertise

International Nuclear Information System (INIS)

Lochard, J.; Schneider, T.; Crouail, P.; Heriard-Dubreuil, G.; Gadbois, S.; Oudiz, A.

2000-11-01

This report gives a synthetic overview of the procedure and the main results of the GRNC (Nord-Cotentin Radioecology Group), and lessons that can be drawn from it. In particular, it is intended to demonstrate the innovation of the pluralist approach adopted by summarizing its historic context and differences with the similar experiment carried out in the United Kingdom for the Sellafield nuclear site 1. It also presents the different steps in the evaluation of exposures and risks associated with ionising radiation. Finally, it emphasizes prospects opened as a result of the Group's experiment on the involvement of stakeholders in the evaluation and management of radiological risk. This final aspect could open up new means of ''preventively'' dealing with questions related to risks to health and the environment inherent to industrial activities. (A.L.B.)

Road map towards a common harmonised Nordic end-user market. NordREG report 5 - 2013

Energy Technology Data Exchange (ETDEWEB)

NONE

2013-07-01

The purpose of this road map is to describe the overall process to harmonise the Nordic electricity end-user markets. The main target groups for the road map are the Nordic governments, legislators and the electricity industry. The road map will continuously be updated as the project progresses, at least once a year. It describes the recommendations already made by NordREG, as well as indicates up-coming recommendations. One important part of the Nordic harmonisation process is the monitoring of the progress of the project. It will be communicated through national implementation monitoring overviews, which will describe the state of play for each recommendation made by NordREG. The road map highlights the importance of national commitment by different stakeholders, authorities and governments in order to successfully harmonise the Nordic end-user markets. This commitment is absolutely essential. The goal for 2015 is to harmonise some of the legislation, rules and processes that constitute barriers for suppliers to establish their business in other Nordic countries. In order to achieve this goal, NordREG is working towards defining responsibilities in the customer interface of the supplier centric model and the way of billing the customers. Another important task is related to development of an efficient way of communication among a large number of Nordic electricity companies. By 2015 the end-user markets should be harmonised to the extent that the most critical prerequisites have been achieved. But it is important to bear in mind that there are still many more steps to be taken also after 2015. The harmonisation process between the Nordic retail markets is a process that will continue for the foreseeable future. Since there is no supranational organisation or institution (like in the EU), it means that any future development of the Nordic retail market will have to be continuously coordinated between the Nordic countries to ensure that the markets maintain the

Contributo di dati di gravità nella valutazione del vulcanismo CAMP in Africa Nord-Occidentale

OpenAIRE

Fabbri, Julius

2015-01-01

2013/2014 La domanda alla base di questa ricerca è stata se il metodo della gravimetria satellitare possa essere utilizzato per seguire le unità geologiche anche in luoghi difficilmente accessibili. L’obiettivo di questa ricerca è di verificare se le missioni satellitari di nuova generazione permettano di identificare la più grande delle province ignee della Terra (Bertrand et al., 2013), nota come CAMP (Central Atlantic Magmatic Province) in Africa nord-occidentale. Oltre alle motivazioni...

Römerzeitliche keramik aus dem nordöstlichen Turm der Römerstadt Horreum Margi

Directory of Open Access Journals (Sweden)

Petković Sofija

2011-01-01

Full Text Available Ćuprija, die ehemalige Römerstadt Horreum Margi, liegt im zentralen Teil Serbiens, an der Mündung des Flusses Ravanica in die Morava. Der Ort war ein Militärlager und spielte eine wichtige Rolle als Sammlungszentrum der Römerprovinz Moesia Superior (Moesia Prima. Zwischen 1986 und 1990 fanden die Ausgrabungen von Horreum Margi statt. Dabei wurden der Innenraum der spätrömischen Festung, die nördliche Mauer und der nordöstliche Turm erforscht. Während der Ausgrabung im Turm wurden unterschiedliche Keramiktypen entdeckt. Schüsseln (acht Typen bilden dabei die Mehrheit. Danach kommen Töpfe (sieben Typen, Amphoren (zwei Typen, Krüge (zwei Typen, Deckel (ein Typ und Becher (ein Typ. Sie gehören alle zu einer komplexen spätrömerzeitlichen Typologie, die für diese Fundstelle erstellt wurde und entsprechen zu den restlichen Keramiktypen, die im Festungsinneren und entlang der Nordmauer ausgegraben kamen. Der Text bietet einen Überblick aller Keramiktypen an, die im nordöstlichen Turm der Römerfestung Horreum Margi entdeckt wurden. [Projekat Ministarstva nauke Republike Srbije, br. 177007: Romanisierung, Urbanisierung und Transformation städtischer Zentren vomzivilen, militärischen und Wohnungscharakter in den römischen Provinzen auf dem Territorium Serbiens i br. 177007: Viminacium dierömische Stadt und Militärlager-Forschung der materiellen und geistigen Hinterlassenschaft mit der Verwendung moderner Technologien: Ferndetektion, Geophysik, Gis Digitalisierung und 3.D Visualisierung

Nord Pool wants to be the leader in CO2

International Nuclear Information System (INIS)

Wellander, Dag

2004-01-01

In the beginning of 2005 Nord Pool introduces standard contracts for European emission rights for carbon dioxide. It is currently too early to speak of a global market for emission rights for greenhouse gases. The problem is not the attitude of the U.S.A., as is often said, but what road is taken by the so-called third world. The acceptance of the Kyoto Protocol by the Russians means that the agreement will come into force in 2005. It is much more important, however, what is going to happen after the first implementation period 2008 - 2012. In that process those countries that strive for one car per household must also be engaged. In particular the giant nations China and India must join the agreement if it is to be a notable climatic agreement of global scope

Final report from the NKS NordThreat seminar in Asker

Energy Technology Data Exchange (ETDEWEB)

Eikelmann, I M.H.; Selnaes, OE G [eds.; Norwegian Radiation Protection Authority (Norway)

2009-11-15

Changes in the international security environment have lead to an increased attention towards the need to revise various threat assessments in the Nordic countries. Together with recent events such as incidents at Nordic nuclear power plants, orphan sources and accidents involving nuclear powered vessels, this has given a good opportunity for an exchange of information and opinions. The NKS-B NordThreat seminar took place at Sem gjestegaard in Asker outside Oslo, Norway on 30 - 31 October 2008. Main topics in the seminar were: 1) National threat assessments 2) Potential hazards 3) Experience from previous incidents 4) Public perception of nuclear and radiological threats and information challenges 5) Challenges for future preparedness. There were about 40 participants at the seminar. These were mainly members of the NKS organisations, invited speakers and representatives from various Norwegian emergency preparedness organisations. (author)

Polymorphisme de l'apolipoprotéine E dans la population du nord du Maroc: fréquence et influence sur les paramètres lipidiques

Science.gov (United States)

Benyahya, Fatiha; Barakat, Amina; Ghailani, Naima; Bennani, Mohcine

2013-01-01

Introduction L'objectif de ce travail est de déterminer les fréquences alléliques et génotypiques des sites polymorphes situés dans le gène de l'apolipoprotéine E (apo E) ainsi que leur impact sur les paramètres cliniques et lipidiques dans un échantillon de la population du nord du Maroc cliniquement diagnostiqué ADH. Méthodes Le génotype de l'apo E a été analysé par séquençage direct chez 46 patients cliniquement diagnostiqués ADH selon les critères standards. Résultats Les fréquences des allèles epsilon 3, epsilon 2 et epsilon 4 ont été respectivement 78.3%, 2.2% et 19.6%. La fréquence de l'allèle epsilon 4 est très élevée chez la population du nord du Maroc en comparaison avec les populations des autres régions marocaines. Elle est similaire à celle rapportée dans les pays de l'Europe du nord. Les taux du cholestérol total, du cholestérol LDL ainsi que la présence des xanthomes et les maladies cardiovasculaires ne différent pas entre les génotypes de l'apoE. En revanche, les résultats ont montré une influence de l'allèle epsilon4 sur le taux des triglycérides chez les sujets obèses. Conclusion Le génotype de l'apoE ne peut expliquer le phénotype clinique et biochimique présenté par des patients du Nord du Maroc cliniquement diagnostiqués ADH. PMID:24396563

Taking energy efficiency to a new scale: the climate change action plan in Nord-Pas de Calais region

International Nuclear Information System (INIS)

Lafolie, Bertrand; Tillerson, Kenya

2005-01-01

Through the experience of a new climate change action plan in the French region 'Nord-Pas de Calais', the paper highlights the urgent necessity as well as the inherent difficulties for energy efficiency strategies to penetrate everyday practices and policies in order to reduce emissions in line with national and international commitments. Nord-Pas de Calais takes pride in two decades of sustained promotion of energy efficiency and renewable energy. Nevertheless, observation shows that regional consumption grows at roughly the same rate as does national consumption. The paper will present the history of energy efficiency in the region and relate the steps in elaborating a new climate change action plan that moves away from a focus on innovative projects towards the integration of easily replicable practices in business as usual. It then discusses some of the practical roadblocks that are faced in attempting to change the scale of achievements. Surprisingly, the main barrier met with until now seems not to be lack of interest and motivation towards energy efficiency from the general public but the way energy efficiency practitioners traditionally work and think eceee '005 Panel 2

La faille Nord-Pyrénéenne dans l’Ariège et la Haute-Garonne

NARCIS (Netherlands)

Sitter, de L.U.

1953-01-01

Un des plus grands phénomènes structuraux des Pyrénées est sans doute la faille Nord-Pyrénéenne qui longe la zone axiale depuis la Méditerranée jusqu'à la côte atlantique. Elle est caractérisée par plusieurs particularités exceptionelles, dont le métamorphisme des terrains jurassiques et crétacés

47 CFR 101.82 - Reimbursement and relocation expenses in the 2110-2150 MHz and 2160-2200 MHz bands.

Science.gov (United States)

2010-10-01

... 47 Telecommunication 5 2010-10-01 2010-10-01 false Reimbursement and relocation expenses in the... License Transfers, Modifications, Conditions and Forfeitures § 101.82 Reimbursement and relocation expenses in the 2110-2150 MHz and 2160-2200 MHz bands. (a) Reimbursement and relocation expenses for the...

77 FR 12450 - Airworthiness Directives; BRP-Powertrain GmbH & Co KG Rotax Reciprocating Engines

Science.gov (United States)

2012-03-01

.... (1) Inspect the oil pump and engine valve train for oil leaks in accordance with paragraph 3.1) step... paragraph 3.1.3) steps 19. through 21. of BRP- Powertrain GmbH & Co KG, Rotax Aircraft Engines Mandatory... Airworthiness Directives; BRP-Powertrain GmbH & Co KG Rotax Reciprocating Engines AGENCY: Federal Aviation...

Final report from the NKS NordThreat seminar in Asker, Norway

International Nuclear Information System (INIS)

Eikelmann, I.M.H.; Selnaes, Oe.G.

2009-11-01

Changes in the international security environment have lead to an increased attention towards the need to revise various threat assessments in the Nordic countries. Together with recent events such as incidents at Nordic nuclear power plants, orphan sources and accidents involving nuclear powered vessels, this has given a good opportunity for an exchange of information and opinions. The NKS-B NordThreat seminar took place at Sem gjestegaerd in Asker outside Oslo, Norway on 30 - 31 October 2008. Main topics in the seminar were: 1) National threat assessments 2) Potential hazards 3) Experience from previous incidents 4) Public perception of nuclear and radiological threats and information challenges 5) Challenges for future preparedness. There were about 40 participants at the seminar. These were mainly members of the NKS organisations, invited speakers and representatives from various Norwegian emergency preparedness organisations. (author)

Nord Stream, the German-Russian oil pipeline under the Baltic Sea from the Swedish point of view

International Nuclear Information System (INIS)

Crone, Olivier

2007-01-01

Nord Stream is a 1.200 km long gas pipeline project between Russia and Germany through the Baltic Sea. It crosses the Swedish, Danish, and Finnish economic zones, and, at mid-way, comprises a control platform about which any traffic will be forbidden within a radius of 500 m. After having recalled some design aspects of this project, the author discusses whether it results in some energetic benefits for Sweden where the project has been a matter of debates on environmental and safety issues. It appears that Sweden is not interested at all in importing fossil energies, and that politicians are opposed to this project, but have no influence on it as the pipeline does not cross Swedish territorial waters. After having evoked the role of Gazprom as energetic weapon of the Russian foreign policy, the author discusses safety issues related to this pipeline and its control platform, and environmental risks as they are perceived by Sweden. Sweden indeed perceives the project infrastructure as being possibly used as a spying tool. As far as environmental issues are concerned, Nord Stream is to submit an environmental impact assessment to Denmark, Finland, Sweden, Germany and Russia. As a Swedish law could constrain and even impede the project, some alternate tracks are already envisaged and studied for the pipeline in order to minimise the environmental impact

76 FR 37684 - Airworthiness Directives; Diamond Aircraft Industries GmbH Model (Diamond) DA 40 Airplanes...

Science.gov (United States)

2011-06-28

... Industries GmbH Model (Diamond) DA 40 Airplanes Equipped With Certain Cabin Air Conditioning Systems AGENCY... inspections of the Diamond Model DA 40 airplanes equipped with a VCS installed per Premier Aircraft Service... GmbH Model (Diamond) DA 40 Airplanes Equipped With Certain Cabin Air Conditioning Systems: Docket No...

77 FR 35890 - Airworthiness Directives; Diamond Aircraft Industries GmbH Airplanes

Science.gov (United States)

2012-06-15

...., Washington, DC 20590, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. For service... Service Information Diamond Aircraft Industries GmbH has issued Mandatory Service Bulletin No. MSB 42-092...

75 FR 52292 - Airworthiness Directives; Diamond Aircraft Industries GmbH Models DA 40 and DA 40F Airplanes

Science.gov (United States)

2010-08-25

... Industries GmbH Models DA 40 and DA 40F Airplanes AGENCY: Federal Aviation Administration (FAA), Department... new airworthiness directive (AD) for all Diamond Aircraft Industries GmbH Models DA 40 and DA 40F... received information from Diamond Aircraft Industries GmbH that the Models DA 40 and DA 40F airplanes have...

Cross sections and neutron yields for U233, U235 and Pu239 at 2200 m/sec

International Nuclear Information System (INIS)

Sjoestrand, N.G.; Story, J.S.

1960-04-01

The experimental information on the 2200 m/sec values for σ abs , σ f , α, ν and η for 233 U , 235 U and 23 been collected and discussed. The values will later be used in an evaluation of a 'best' set of data. In appendix the isotopic abundances of the uranium isotopes are discussed and also the alpha activities of the uranium isotopes and Pu-239

77 FR 42958 - Airworthiness Directives; Eurocopter Deutschland GmbH Helicopters

Science.gov (United States)

2012-07-23

... airworthiness directive (AD) for Eurocopter Deutschland GmbH (ECD) Model MBB-BK 117 (all versions) and BO-105LS... tail rotor pitch link and subsequent loss of control of the helicopter. DATES: This AD becomes... improperly swaged spherical bearing on the pitch link, which could result in loss of tail rotor control and...

Lippe-Ems GmbH nuclear power stations. Annual report 1992

International Nuclear Information System (INIS)

1993-01-01

The Nuclear power company Lippe-Ems GmbH (KLE) runs the Emsland Nuclear Power Station (KKE) in Lingen (Ems) with a 1300 MW pressurized Water reactor. Partners of KLE are VEW and Elektromark. This 1992 annual report reveals numerous financial data of the operator (balance sheet, profit and loss account.) (orig./UA) [de

10 years of sanitation work at Wismut GmbH

International Nuclear Information System (INIS)

Runge, W.

2001-01-01

Ten years after the work on uranium mines abandoned in 1990 was started, all sites of the Wismut GmbH report considerable progress. Of the 13 billion DM granted in 1991 by the German state, 6.7 had been spent by the end of 2000. DM 2.7 billion were spent in East Thuringia and DM 3 billion in Sayony. The work done in 2000 amounted to DM 485 million [de

Hochtemperatur-Kernkraftwerk GmbH (HKG). Annual report 1985

International Nuclear Information System (INIS)

1986-01-01

The annual report presents the agenda of the general meeting of members, held on July 3, 1986 at Hamm-Uentrop, the report of the managing board, and the annual financial statement as of December 31, 1985, including the profit and loss account of the period January 1 to December 31, 1985. The object of the HKG GmbH is the planning, financing, installation, and operation of the Hamm-Uentrop nuclear power station equipped with a high-temperature reactor, as a joint enterprise of the European partners. (UA) [de

Performance Evaluation of the IrisScan2200 Against Four Respirator Masks; TOPICAL

International Nuclear Information System (INIS)

WRIGHT, LARRY J.; TERRY, PRESTON L.

2002-01-01

The use of biometrics for the identification of individuals is becoming more prevalent in society and in the general government community. As the demand for these devices increases, it becomes necessary for the user community to have the facts needed to determine which device is the most appropriate for any given application. One such application is the use of biometric devices in areas where an individual may not be able to present a biometric feature that requires contact with the identifier (e.g., when dressed in anti-contamination suits or when wearing a respirator). This paper discusses a performance evaluation conducted on the IrisScan2200 from Iridian Technologies to determine if it could be used in such a role

Evidências empíricas sobre a relação entre formação do PIB e gastos públicos nos municípios pernambucanos no período de 1997 a 2009.

OpenAIRE

Barros, Nathale Anardja Lins do Rêgo

2013-01-01

As disparidades econômicas entre regiões incitam as diversas esferas governamentais a buscar ferramentas que as auxiliem na amenização das consequências negativas que tais discrepâncias ocasionam. Nesse sentido, vários estudos procuram determinar de que forma os gastos públicos afetam a produtividade do setor privado e, consequentemente, a formação do Produto Interno Bruto. No caso do Estado de Pernambuco, apesar deste ser apontado com um dos mais desenvolvidos da Região Nordes...

77 FR 65503 - Airworthiness Directives; Diamond Aircraft Industries GmbH Airplanes

Science.gov (United States)

2012-10-29

... through Friday, except Federal holidays. For service information identified in this proposed AD, contact.... Prompted by the reported event, Diamond Aircraft Industries (DAI) published Recommended Service Bulletin... MCAI in the AD docket. Relevant Service Information Diamond Aircraft Industries GmbH has issued the...

78 FR 16196 - Airworthiness Directives; Eurocopter Deutschland GmbH Helicopters

Science.gov (United States)

2013-03-14

... directive (AD) for all Eurocopter Deutschland GmbH (ECD) EC 135 P1, P2, P2+, T1, T2, and T2+ helicopters..., except Federal holidays. The AD docket contains this proposed AD, the economic evaluation, any comments.... We prepared an economic evaluation of the estimated costs to comply with this proposed AD and placed...

Cross sections and neutron yields for U-233, U-235 and Pu-239 at 2200 m/sec

Energy Technology Data Exchange (ETDEWEB)

Sjoestrand, N G; Story, J S

1960-04-15

The experimental information on the 2200 m/sec values for {sigma}{sub abs}, {sigma}{sub f}, {alpha}, {nu} and {eta} for {sup 233}U , {sup 235}U and {sup 23} been collected and discussed. The values will later be used in an evaluation of a 'best' set of data. In appendix the isotopic abundances of the uranium isotopes are discussed and also the alpha activities of the uranium isotopes and Pu-239.

NKS NordRisk II: Atlas of long-range atmospheric dispersion and deposition of radionuclides from selected risk sites in the Northern Hemisphere

DEFF Research Database (Denmark)

Smith Korsholm, Ulrik; Astrup, Poul; Lauritzen, Bent

The present atlas has been developed within the NKS/NordRisk-II project "Nuclear risk from atmospheric dispersion in Northern Europe". The atlas describes risks from hypothetical long-range dispersion and deposition of radionuclides from 16 nuclear risk sites on the Northern Hemisphere...... spanning the climate variability associated with the North Atlantic Oscillation, and corresponding time evolution of the ensemble mean atmospheric dispersion....

The Kerntechnischer Hilfsdienst GmbH and its facilities for emergency cases

International Nuclear Information System (INIS)

Neumann, W.

1979-01-01

Organisation of the KHG: Permanent staff, specialized staff, readiness for calling, readiness for transport, user contracts. Technical equipment: Radiation protection equipment, gas masks and breathing equipment, decontamination equipment, remote-controlled manipulator vehicles, radio equipment and image transmission. Tasks of the Kerntechnischer Hilfsdienst GmbH. (orig.) [de

47 CFR 101.69 - Transition of the 1850-1990 MHz, 2110-2150 MHz, and 2160-2200 MHz bands from the fixed microwave...

Science.gov (United States)

2010-10-01

..., and 2160-2200 MHz bands from the fixed microwave services to personal communications services and...) SAFETY AND SPECIAL RADIO SERVICES FIXED MICROWAVE SERVICES Applications and Licenses License Transfers... MHz bands from the fixed microwave services to personal communications services and emerging...

77 FR 66409 - Airworthiness Directives; Diamond Aircraft Industries GmbH Airplanes

Science.gov (United States)

2012-11-05

...., Washington, DC 20590, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. For service... occupants. To address this concern, Diamond Aircraft Industries (DAI) published Mandatory Service Bulletin... MCAI in the AD docket. Relevant Service Information Diamond Aircraft Industries GmbH has issued Diamond...

Commercial development of a new process of uraniferous ore sintering by pelletizing before dump leaching (wet process) application to a very clayey ore of Nord-Aquitaine

International Nuclear Information System (INIS)

Videau, G.; Roche, M.

1990-01-01

Much of the French uranium ore contains clay of sedimentary origin or derived from the alteration of rocks of the granite type. During a dump leaching operation by a wet process, these clays reduce the percolation rates and sometimes the percolation rates are so low that the very essence of the dump leaching operation can be called in question. This problem arises particularly for the treatment of the ore of Nord-Aquitaine. The results of tests, carried out at the SEPA in Bessines, have shown that after pelletizing clayey ores with sodium silicate in the presence of sulphuric acid for the polymerization of the silicate, the percolation rates were much increased. This new method was successfully applied, from a laboratory column to a pilot dump of 500 tonnes for the very clayey ore of Nord-Aquitaine. This ore of low grade (approx. 1000 ppm of U) seems to be difficult to upgrade by any other method of treatment in the present economic context [fr

78 FR 22209 - Airworthiness Directives; Eurocopter Deutschland GmbH Helicopters

Science.gov (United States)

2013-04-15

... GmbH (Eurocopter) Model EC135 P1, EC135 P2, EC135 P2+, EC135 T1, EC135 T2, EC135 T2+, and MBB-BK 117 C... holidays. The AD docket contains this proposed AD, the economic evaluation, any comments received, and... evaluation of the estimated costs to comply with this proposed AD and placed it in the AD docket. List of...

Selective Laser Sintering of PA2200: Effects of print parameters on density, accuracy, and surface roughness

Energy Technology Data Exchange (ETDEWEB)

Bajric, Sendin [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

2017-06-12

Additive manufacturing needs a broader selection of materials for part production. In order for the Los Alamos National Laboratory (LANL) to investigate new materials for selective laser sintering (SLS), this paper reviews research on the effect of print parameters on part density, accuracy, and surface roughness of polyamide 12 (PA12, PA2200). The literature review serves to enhance the understanding of how changing the laser powder, scan speed, etc. will affect the mechanical properties of a commercial powder. By doing so, this understanding will help the investigation of new materials for SLS.

Asie : Asie de l'Est : Japon : Région de Kanto : Préfecture de Tokyo : Tokyo : Habitations récentes dans la banlieue Nord

OpenAIRE

Lubeigt , Guy

1983-01-01

Commentaire de l'auteur en 2015: Tokyo a été presque entièrement détruite par les bombardements US en 1945 - Toutes les maisons en bois ont flambé; Légende manuscrite sur le document original : "Tokyo, banlieue N. Nouveau lotissement, toits en tuiles. " Géolocalisation : Approximative centrée sur le Nord de Tokyo.

Stranieri e vicini: le banche attraverso le frontiere del nord America. (Strangers and neighbours: cross-border banking in North America

Directory of Open Access Journals (Sweden)

J.W. DEAN

2013-12-01

Full Text Available L'articolo si occupa di aspetti normativi e competitivi della penetrazione reciproca da parte delle banche canadesi e statunitensi nei rispettivi mercati nazionali . Gli autori valutano il grado in cui i fattori economici sono gli unici responsabili per la differenza nei tassi di crescita tra le banche nazionali ed estere in Nord America. Essi sostengono che il regolamento non ha inciso sullala crescita delle banche estere in Nord America affrontando la questione della reciprocità in regolamenti bancari , prima di esaminare le banche estere negli Stati Uniti e il modo in cui sono state regolamentate .The paper is concerned with regulatory and competitive aspects of the mutual penetration by Canadian and U.S. banks of each other’s domestic markets. The authors assess the degree to which economic factors alone are responsible for the difference in growth rates between domestic and foreign banks in North America. They argue that regulation has not affected the growth of foreign banks in North America by addressing the question of reciprocity in banking regulations, before examining foreign banks in the U.S. and the manner in which they have been regulated. U.S. banks operating in Canada are then dealt with. Finally, the results of an empirical test of the proposition that the growth of cross-border banking is attributable to factors other than differential regulation is presented.JEL: G21

L’architecture médiévale en brique dans le nord de l’Europe

OpenAIRE

Debonne, Vincent

2013-01-01

Dans le nord de l’Europe, l’archéologie du bâti accorde un intérêt particulier à la brique, ce matériau de construction qui se répand très vite après sa « réinvention » aux alentours de 1200. Si les recherches sur l’histoire de la brique dans ces régions remontent au début du xxe siècle, on assiste depuis une vingtaine d’années à une nouvelle dynamique des études dans plusieurs pays. L’Allemagne donne le ton : non seulement s’y développe une variété d’approches de l’architecture médiévale en ...

The relationship between spot and futures prices in the Nord Pool electricity market

International Nuclear Information System (INIS)

Botterud, Audun; Kristiansen, Tarjei; Ilic, Marija D.

2010-01-01

We analyze 11 years of historical spot- and futures prices from the hydro-dominated Nord Pool electricity market. We find that futures prices tend to be higher than spot prices. The average convenience yield is therefore negative, but varies by season and depends on the storage levels in hydro reservoirs. The average realized return on holding a long position in the futures market is also negative. The negative convenience yield and risk premium contrast empirical findings in most other commodity markets. We argue that differences between the supply and demand sides in terms of risk preferences and the ability to take advantage of short-term price variations can contribute to explain the observed relationship between spot- and futures prices. In addition, our analysis shows that the relationship between spot and futures prices is clearly linked to the physical state of the system, such as hydro inflow, reservoir levels, and demand. (author)

Application of resistivity measurements to research on structural elements in the Nord-Limousin (France) uraniferous basin (1960); Application des mesures de resistivite a la recherche des elements structuraux dans le bassin uranifere du Nord-Limousin (France) (1960)

Energy Technology Data Exchange (ETDEWEB)

Sarcia, J A; Bonnet, J; Combe, R [Commissariat a l' Energie Atomique, Saclay (France).Centre d' Etudes Nucleaires

1960-07-01

The authors discuss the difficulties encountered in the exploration of a typical deposit in the Nord-Limousin, using the resistivity measurement method. In the zone in question the over-thrust was very variable and difficult to predict. The uraniferous deposits had two types of aspect, the passage from one to the other being often very sudden: long thin veins without gangue; short and thick lens-shape deposits which were strongly contaminated by clay towards their edges. After several unsatisfactory attempts, the device known as the 'rectangular map' was adopted and gave an acceptable structural representation rapidly and cheaply. For the placing of the probes however, methods are required which are more refined and sensitive. It is in any case useless to expect to obtain a satisfactory representation and a sufficient accuracy using a single technique; especially in the region under consideration. (author) [French] Les auteurs exposent les difficultes rencontrees pour l'exploration, par la methode des mesures de resistivite, d'un gisement type du Nord-Limousin: il s'agissait d'une zone a recouvrement tres variable et difficilement previsible. Les occurences uraniferes y affectaient deux facies passant brutalement de l'un a l'autre: longs filonnets minces et sans gangue; lentilles courtes et puissantes avec alteration argileuses tres etendue aux epontes. Apres plusieurs essais peu satisfaisants, le dispositif dit 'carte des rectangles' a ete adopte pour obtenir rapidement et a bon compte un schema structural suffisant. Mais des methodes plus fines et plus sensibles sont necessaires pour guider l'implantation des sondages. Il est d'ailleurs vain d'esperer trouver a la fois la representativite d'ensemble et la precision, dans l'utilisation d'une seule technique, surtout dans la region envisagee. (auteur)

Petroleum - as far as available. Analysis and critical model calculation up to the year 2200. Erdoel - soweit verfuegbar. Analyse und kritische Modellrechnung bis zum Jahr 2200

Energy Technology Data Exchange (ETDEWEB)

Stahmer, A M

1979-01-01

An outline is given on the most important oil producing countries and on the petroleum reserves available there as they developed from 1960 to 1978. For the last few years, the figures at hand show a distinct decline of new discoveries i.e. of proved reserves, compared with consumption. Prospective development factors are critically examined, and a model of potential petroleum supply is developed covering the period up to the year 2200 and requiring the adjustment of production and consumption. Until 1986, the model shows a plateau of international oil production (and of consumption) amounting to 3 billion tons per year on an average, and subsequently a constant decline of output. The international average consumption being kept at a relatively high level is to give the world economy the opportunity to develop alternative energy sources. From this detailed statement follows automatically the demand to increase exploratory activities and to lead an optimal consumption policy. In a separate section deposits of heavy oil sands and oil shales and respective production technologies are dealt with as well as their potential contribution to meet energy needs.

Etude saisonnière de la contamination métallique des macroalgues de la lagune nord de Tunis

OpenAIRE

Chouba, L.; Ajjabi-Chebil, L.; Herry, S.

2010-01-01

Dans le but de démontrer la capacité de bioaccumulation métallique des macroalgues et sa variation temporelle, on s’est intéressé à la détermination de la gamme de concentrations en métaux traces (Plomb, Cadmium, Fer, Manganèse et Zinc) dans trois macroalgues vertes (Ulva rigida, Chaetomorpha linum, Caulerpa prolifera) au niveau de la lagune nord et du canal de navigation de Tunis sujettes à d’importants rejets anthropiques. Des collectes saisonnières ont été faites dans la lagune de Tunis du...

Quelques conséquences de l'introduction de deux espèces de macrophytes, Elodea canadensis Michaux et Elodea nuttallii St. John, dans les écosystèmes aquatiques continentaux : exemple de la plaine d'Alsace et des Vosges du Nord (Nord-Est de la France

Directory of Open Access Journals (Sweden)

THIEBAUT G.

1997-01-01

Full Text Available L'introduction au XIXème et XXème siècle, de deux espèces d'élodées Elodea canadensis Michaux et Elodea nuttallii St. John, dans les cours d'eau du nord-est de la France, a induit des modifications dans la composition floristique et le fonctionnement des écosystèmes aquatiques. L'analyse comparative de la distribution géographique de ces deux hydrophytes dans les eaux calcaires (plaine d'Alsace et acides (Vosges du Nord a permis de préciser leur écologie. Après des phases successives d'expansion des deux espèces, celles-ci se sont intégrées dans les phytocénoses aquatiques. L'introduction dans les écosystèmes aquatiques d'Elodea canadensis et d'E. nuttallii a induit des phénomènes de compétition interspécifique, en faveur essentiellement d'Elodea nuttallii. Cette dernière apparaît comme l'espèce la plus compétitive dans les cours d'eau eutrophes de la plaine d'Alsace (aptitude à accumuler le phosphore, sensibilité moindre à l'azote ammoniacal. Les élodées peuvent réaliser une épuration biologique, mais provoquent, lors de leur décomposition, une eutrophisation secondaire des eaux en absence de faucardage.

Nord Stream 2: May Cooler Heads Prevail

International Nuclear Information System (INIS)

Aoun, Marie-Claire

2016-01-01

Since the announcement of the Nord Stream 2 project in June 2015, the debate around the benefits of this project for Europe is raging, putting forward political, economic and commercial arguments. Within the space of a few months, Russia has conducted a radical strategic change towards Europe in its gas policy. Following the announcements in 2014 of a major shift towards Asia, the cancellation of the South Stream project and its replacement by the Turkish Stream, relations with European gas companies have been strengthened since mid-2015. Russia's initiatives to replace its European partners are now to be viewed as part of a transformed international gas landscape. Tensions in the liquefied natural gas (LNG) market following Fukushima have given way to market surpluses. These are characterised on the one hand by lower growth in Asian demand for LNG gas, and on the other hand by the arrival on the market of new major exporters such as Australia and the United States. A new era, more favourable to gas importing countries, has opened up since the end of 2014. Moreover, the key pivot to Asia, expected by Moscow in 2014, is still far off. Discussions with Beijing about the project for a Western route proved to be more difficult than expected. Similarly, negotiations between Turkey and Russia on the Turkish Stream project have been very laborious, having been interrupted for several months because of diplomatic rows between the two countries. Finally, Russia's room for manoeuvre has narrowed, given the collapse in oil and gas prices and Western economic sanctions, which are weighing heavily on its economy. And the increased competitiveness of Russian oil companies due to the ruble devaluation will not transform this situation sustainably

The Nordic power exchange Nord pool and the Nordic model for a liberalised power market

International Nuclear Information System (INIS)

Houmoller, A. P.

2000-01-01

As the first countries in the world, the Nordic countries Norway, Sweden, Finland and denmark have established a common, multinational power exchange. By means of this common power exchange, these countries also have established a common power market. this is also the first - and for the time being - the only place in the world, where you can find a multinational, truly competitive power market. This Nordic model has attracted much interest from other countries in Europe, Asia, North America and South America. The presentation will explain, how the common power exchange makes it possible for the four countries and the five system operators in Scandinavia physically and financially to operate a common, multinational, competitive power market. The presentation will explain how this systems works in the Nordic countries by discussion the following items: - The non-commercial players: The Transmission System Operators and the local grid operators; - The market players: the producers, the retailers, the traders, the brokers and the end users; - The access to the grid: The point tariff system; - The fairness towards the market players and the security of supply: The balancing power and the regulating power; - The power exchange handles bottlenecks in the grid. The presentation will explain how this is done and will demonstrate how this gives the power market a bottleneck handing method which:- Is neutral and fair towards all the market players, - Ensures that all the capacity of any bottleneck is utilised during every hour of operation, - Is extremely easy to use for the Transmission System Operators - also if the bottleneck is cross-border bottleneck; - The Nord Pool spot market Elspot; - The Nord Pool futures market Eltermin; - Area prices; - How financial contracts replace physical contracts when the power market is liberalised; - The day-to-day market and the market for long-term contracts in a liberalised power market; - How to eliminate the c ounter party risk

The energy-effective redesign of district heat supply for the city of Eisenach; Energiewirtschaftliche Neugestaltung der Fernwaermeversorgung fuer die Stadt Eisenach

Energy Technology Data Exchange (ETDEWEB)

Stich, J. [Eproplan GmbH, Stuttgart (Germany)

1996-09-01

The present contribution describes the optimal heat generation for the district heat area ``North`` of the city of Eisenach and economic redesign of this district heat network. The district heat network is operated by the public utility of Eisenach (Eisenacher Versorgungs-Betriebe GmbH (EVB)), which also runs the heating station, that used to be fuelled with coal. (orig./GL) [Deutsch] Der vorliegende Beitrag befasst sich mit der optimalen Waermeerzeugung fuer das Fernwaerme-Versorgungsgebiet `Nord` der Stadt Eisenach und mit der wirtschaftlichen Umgestaltung dieses Fernwaermenetzes. Das Fernwaermenetz wird durch die Eisenacher Versorgungs-Betriebe GmbH (EVB) betrieben, wie auch das ehemalige kohlegefeuerte Heizwerk. (orig./GL)

Status report on the review of the 2200 m/sec fission constants

Energy Technology Data Exchange (ETDEWEB)

Good, W M

1968-05-15

The monitoring of the 2200 m/sec constants of the fissile nuclides has been a continuing activity of the IAEA. From the long-range point of view, such an activity should consist of occasional reviews to assure that the data and analytical methods are in fact the 'best that are currently available according to expert opinion. Such a review has just been concluded, by a group augmented in size from the first one of several years ago, to include representative members from USA and USSR. Because the meeting proper have so recently taken place and because of certain handicaps suffered from underestimating the magnitude of such a revision, no very complete written report is available at INDC meeting time. In order that the committee might reflect on the relative importance of this Agency activity at this time, Dr. Carl Westcott who coordinated the work has given permission to submit his unedited comments on the present status of the recent review.

Status report on the review of the 2200 m/sec fission constants

International Nuclear Information System (INIS)

Good, W.M.

1968-05-01

The monitoring of the 2200 m/sec constants of the fissile nuclides has been a continuing activity of the IAEA. From the long-range point of view, such an activity should consist of occasional reviews to assure that the data and analytical methods are in fact the 'best that are currently available according to expert opinion. Such a review has just been concluded, by a group augmented in size from the first one of several years ago, to include representative members from USA and USSR. Because the meeting proper have so recently taken place and because of certain handicaps suffered from underestimating the magnitude of such a revision, no very complete written report is available at INDC meeting time. In order that the committee might reflect on the relative importance of this Agency activity at this time, Dr. Carl Westcott who coordinated the work has given permission to submit his unedited comments on the present status of the recent review

Mental health and wellbeing in spouses of persons with dementia: the Nord-Trøndelag Health Study.

Science.gov (United States)

Ask, Helga; Langballe, Ellen Melbye; Holmen, Jostein; Selbæk, Geir; Saltvedt, Ingvild; Tambs, Kristian

2014-05-01

Caring for a spouse diagnosed with dementia can be a stressful situation and can put the caregiving partner at risk of loss of mental health and wellbeing. The main aim of this study was to investigate the relationship between dementia and spousal mental health in a population-based sample of married couples older than 55 years of age. The association was investigated for individuals living together with their demented partner, as well as for individuals whose demented partner was living in an institution. Data on dementia were collected from hospitals and nursing homes in the county of Nord-Trøndelag, Norway. These data were combined with data on spousal mental health, which were collected in a population-based health screening: the Nord-Trøndelag Health Study (HUNT). Of 6,951 participating couples (>55 years), 131 included one partner that had been diagnosed with dementia. Our results indicate that after adjustment for covariates, having a partner with dementia is associated with lower levels of life satisfaction and more symptoms of anxiety and depression than reported by spouses of elderly individuals without dementia. Spouses living together with a partner diagnosed with dementia experienced moderately lower levels of life satisfaction (0.35 standard deviation [SD]) and more symptoms of depression (0.38 SD) and anxiety (0.23 SD) than did their non-caregiving counterparts. Having a partner with dementia that resided in a nursing home was associated with clearly lower life satisfaction. Compared with non-caregivers, these spouses reported lower levels of life satisfaction (1.16 SD), and also more symptoms of depression (0.38 SD), and more symptoms of anxiety (0.42 SD). Having a partner with dementia is associated with loss of mental health and reduced life satisfaction. The risk of adverse mental health outcomes is greatest after the partner's nursing home admission.

Business model analysis in asset management : the case JRS Finanzmandate Gmbh

OpenAIRE

Rogg, Christina

2016-01-01

This bachelor’s thesis was prepared to solve a current business case on behalf of JRS Finanzmandate GmbH, a German independent financial advisory and asset management company. The objectives of this thesis were to thoroughly examine the JRS business model, observe the competitive environment and detect future market opportunities. After identification of arising challenges, innovative approaches to achieve a competitive advantage within this niche industry were illustrated. Financ...

Marine environment protection of the North Sea and Baltic Sea. Special report - February 2004; Meeresumweltschutz fuer Nord- und Ostsee. Sondergutachten - Februar 2004

Energy Technology Data Exchange (ETDEWEB)

NONE

2004-07-01

The marine environment of the North Sea and Baltic Sea is still heavily polluted. The marine ecosystems are under severe stress from overfishing, water pollution, raw materials production and tourism. Environmental protection in this region necessitates decisive political initiatives and strict corrections especially in fishery policy, agricultural policy and chemical substances control. This is the balance of the special expert opinion of the Council of Environmental Experts. The publication specifies the main problem areas, the current pollution situation, the fields where action is most urgently required - especially in fishery, chemical substances, agricultural and sea travel policies - and presents suggestions for an integrated European and national marine protection policy including a regional development concept for the marine environment. (orig.) [German] Die Meeresumwelt von Nord- und Ostsee ist nach wie vor stark belastet. Ueberfischung, Schadstoffeintraege und Ueberduengung sowie die intensive Nutzung durch Schifffahrt, Rohstoffabbau und Tourismus beeintraechtigen vielfach massiv die marinen Oekosysteme. Ein wirksamer Meeresumweltschutz erfordert daher einschneidende politische Initiativen und grundlegende Korrekturen insbesondere in der Fischereipolitik, der Agrarpolitik und bei der Chemikalienregulierung. Diese Bilanz zieht der Rat von Sachverstaendigen fuer Umweltfragen in seinem aktuellen Sondergutachten 'Meeresumweltschutz fuer Nord- und Ostsee'. Das Sondergutachen - gibt einen Ueberblick ueber die wichtigsten Problemfelder und die aktuelle Belastungslage, - zeigt den wesentlichen Handlungsbedarf auf, insbesondere fuer die Fischerei-, Chemikalien-, Agrar- und Schifffahrtspolitik und - entwickelt Vorschlaege fuer eine integrierte europaeische und nationale Meeresschutzpolitik einschliesslich einer Merresraumordnung. (orig.)

Caracterização e classificação dos resíduos de construção civil da cidade de Fortaleza (CE

Directory of Open Access Journals (Sweden)

Adriana Sampaio Lima

2013-06-01

Full Text Available Este estudo visa analisar a composição gravimétrica, avaliar parâmetros químicos e classificar os Resíduos de Construção Civil (RCC da cidade de Fortaleza de acordo com a Resolução CONAMA nº 307 e com a NBR 10004. Os resultados indicam que o RCC de Fortaleza é composto por 93,40% do Grupo A, 6,40% do Grupo B, 0,02% do Grupo C e 0,20% Grupo D. O primeiro é composto principalmente por areia e solo (24,65% e argamassa (22,00%, que são materiais com alto potencial de reutilização ou reciclagem. Além disso, de acordo com a análise química, o RCC de Fortaleza mostrou alta variabilidade em todos os parâmetros. Cr, Pb e SO4²-, por exemplo, apresentaram valores acima dos limites especificados pela NBR 10004, indicando que esse material deve ser classificado como Classe II-A (não perigoso e não inerte.

Памятник преградил путь Nord Stream / Туули Кох

Index Scriptorium Estoniae

Кох, Туули

2010-01-01

Vene- Saksa gaasijuhtme ehituse sõlmpunktiks muutuval Gotlandil jäi Slite sadamasse Nord Streami raha eest ehitatud kaile ette mälestusmärk eestlastele ja lätlastele, kes 1944. aastal punavõimu eest põgenedes Gotlandile jõudsid. Kaart

Salmonella spp. e antibiotico-resistenza in Mammiferi e Uccelli selvatici in Italia nord-occidentale dal 2002 al 2010

Directory of Open Access Journals (Sweden)

Velca Botti

2013-06-01

Full Text Available La Salmonella è un importante agente patogeno responsabile di zoonosi di notevole rilevanza economica. In Europa la salmonellosi è la seconda infezione trasmessa per via alimentare, in Italia il microrganismo continua ad essere la causa più frequente di infezione alimentare. In Europa sono in atto molti piani di sorveglianza di Salmonella in animali da allevamento, tuttavia il monitoraggio del microrganismo in animali selvatici è effettuato solo occasionalmente. Lo studio ha avuto l'obiettivo di indagare la presenza di Salmonella in animali selvatici e i ceppi antibiotico-resistenti. Nel periodo 2002-2010, 2.713 animali selvatici (Canidi, Mustelidi, Uccelli, Roditori e Ungulati, provenienti da aree dell'Italia nord-occidentale, sono stati testati per Salmonella mediante metodo microbiologico colturale seguito da tipizzazione sierologica e biochimica. Di questi, 117 (63 Canidi, 25 Mustelidi, 24 Uccelli, 5 Ungulati sono risultati positivi per Salmonella (4,3%. Sono stati isolati 130 ceppi appartenenti a diversi sierotipi e Salmonella Typhimurium è risultato quello più rappresentato. La sensibilità agli antibiotici è stata testata su 88 ceppi con test di disco-diffusione. La maggior parte dei ceppi analizzati (97,7% si sono mostrati intermedi (I o resistenti (R ad almeno una classe di antibiotici. I più alti valori sono stati osservati per la classe delle tetracicline. La presenza di sierotipi di Salmonella antibiotico-resistenti e responsabili di zoonosi è stata riscontrata in diverse specie di animali selvatici.

Финны могут поддержить Nord Stream / Мадис Филиппов

Index Scriptorium Estoniae

Филиппов, Мадис

2009-01-01

Soome ja Eesti keskkonnaministeeriumi ning teadlaste kohtumisel arutati gaasijuhtmega Nord Stream kaasnevaid probleemseid keskkonnaküsimusi: Eesti teadlased on endiselt seisukohal, et gaasijuhtmel on Eesti keskkonnale väga negatiivne mõju

Recenser et étudier le patrimoine religieux du XXe siècle : l’exemple de l’inventaire des églises du Nord-Pas-de-Calais (1945-2000

Directory of Open Access Journals (Sweden)

Céline Frémaux

2009-11-01

Full Text Available La seconde moitié du XXe siècle fut une période de mutation accélérée de l’architecture religieuse en France. L’inventaire des églises paroissiales reconstruites et construites dans la région Nord-Pas-de-Calais entre 1945 et 2000 en reflète les divers aspects. Le corpus de 183 églises servant de base à une thèse de doctorat révèle l’effort d’adaptation de l’Église aux mutations historiques, économiques et sociales de cette périodeThe second half of the 20th century was a time of tumultuous changes in French religious architecture. The survey of parish churches built in the Nord-Pas-de-Calais region between 1945 and 2000 reflects all these changes. The corpus of 183 churches, on which a thesis has been based, reveals the church’s ability as an institution to adapt to the historical, economic and social changes of its time.

Proceedings of The 13. Nordic Workshop on Secure IT Systems, NordSec 2008, Kongens Lyngby Oct 9-10, 2008

DEFF Research Database (Denmark)

in Security and Mobile Computing “NordSecMob”, and a meeting of the FIRST research school. We received a total of 39 submissions in response to the call for papers, and the programme committee selected 17 of these for presentation at the workshop—one short paper, which is not included in the proceedings......, and 16 research papers. It was a pleasure for us to work with the program committee, and we want to thank both them and the additional reviewers. Beside the submitted contributions we invited Audun Jøsang, University of Oslo, and Michael Huth, Imperial College London, to speak at the workshop. Abstracts...

Эстонские ученые против строительства Nord Stream

Index Scriptorium Estoniae

2009-01-01

Eesti Teaduste Akadeemia kirjast president Toomas Hendrik Ilvesele ja peaminister Andrus Ansipile sooviga moodustada professionaalne komisjon, mis töötaks läbi Nord Streami gaasijuhtme keskkonnamõju hindamise materjalid

75 FR 71371 - Airworthiness Directives; Thielert Aircraft Engines GmbH Models TAE 125-01, TAE 125-02-99, and...

Science.gov (United States)

2010-11-23

... Engines GmbH Models TAE 125-01, TAE 125-02-99, and TAE 125-02-114 Reciprocating Engines AGENCY: Federal... Engines GmbH models TAE 125-01, TAE 125-02-99, and TAE 125-02-114 reciprocating engines installed in, but..., Operation & Maintenance Manual OM- 01-02, Issue 3, Revision 13. (ii) For TAE 125-02-99 and TAE 125-02-114...

76 FR 17757 - Airworthiness Directives; Thielert Aircraft Engines GmbH Models TAE 125-01, TAE 125-02-99, and...

Science.gov (United States)

2011-03-31

... Airworthiness Directives; Thielert Aircraft Engines GmbH Models TAE 125-01, TAE 125-02-99, and TAE 125-02-114.... Applicability (c) This AD applies to Thielert Aircraft Engines GmbH models TAE 125-01, TAE 125-02-99, and TAE...) For TAE 125-02-99 and TAE 125-02-114 engines, Operation & Maintenance Manual OM-02-02, Version 2...

Common long-range dependence in a panel of hourly Nord Pool electricity prices and loads

DEFF Research Database (Denmark)

Ergemen, Yunus Emre; Haldrup, Niels; Rodríguez-Caballero, Carlos Vladimir

to strong seasonal periodicity, and along the cross-sectional dimension, i.e. the hours of the day, there is a strong dependence which necessarily has to be accounted for in order to avoid spurious inference when focusing on the time series dependence alone. The long-range dependence is modelled in terms...... of a fractionally integrated panel data model and it is shown that both prices and loads consist of common factors with long memory and with loadings that vary considerably during the day. Due to the competitiveness of the Nordic power market the aggregate supply curve approximates well the marginal costs...... data approaches to analyse the time series and the cross-sectional dependence of hourly Nord Pool electricity spot prices and loads for the period 2000-2013. Hourly electricity prices and loads data are characterized by strong serial long-range dependence in the time series dimension in addition...

Validation of the G.LAB MD2200 wrist blood pressure monitor according to the European Society of Hypertension, the British Hypertension Society, and the International Organization for Standardization Protocols.

Science.gov (United States)

Liu, Ze-Yu; Zhang, Qing-Han; Ye, Xiao-Lei; Liu, Da-Peng; Cheng, Kang; Zhang, Chun-Hai; Wan, Yi

2017-04-01

To validate the G.LAB MD2200 automated wrist blood pressure (BP) monitors according to the European Society of Hypertension International Protocol (ESH-IP) revision 2010, the British Hypertension Society (BHS), and the International Organization for Standardization (ISO) 81060-2:2013 protocols. The device was assessed on 33 participants according to the ESH requirements and was then tested on 85 participants according to the BHS and ISO 81060-2:2013 criteria. The validation procedures and data analysis followed the protocols precisely. The G.LAB MD2200 devices passed all parts of ESH-IP revision 2010 for both systolic and diastolic BP, with a device-observer difference of 2.15±5.51 and 1.51±5.16 mmHg, respectively. The device achieved A/A grading for the BHS protocol and it also fulfilled the criteria of ISO 81060-2:2013, with mean differences of systolic and diastolic BP between the device and the observer of 2.19±5.21 and 2.11±4.70 mmHg, respectively. The G.LAB MD2200 automated wrist BP monitor passed the ESH-IP revision 2010 and the ISO 81060-2:2013 protocol, and achieved the A/A grade of the BHS protocol, which can be recommended for self-measurement in the general population.

Framatome ANP GmbH concept of Plant Life Management (PLIM)

International Nuclear Information System (INIS)

Daeuwel, W.; Biemann, W.; Danisch, R.; Kastner, B.; Meyer, W.; Nopper, H.; Waas, U.; Warnken, L.

2002-01-01

The deregulation of the power generation industry has resulted in increased competitive pressure and is forcing operators to improve plant operating economy while maintaining high levels of plant safety. A key factor to meeting this challenge is to apply a comprehensive plant life management (PLIM) approach which addresses all relevant ageing and degradation mechanisms regarding the safety concept, plant component structures and documentation, plant personnel, consumables, operations management system and administrative controls. For this reason, Framatome ANP GmbH has developed an integrated PLIM concept applicable for both new and operating plants and focusing on the safety concept, plant component structures and documentation. (orig.)

SIMS study of oxygen diffusion in monoclinic HfO2

Science.gov (United States)

Mueller, Michael P.; De Souza, Roger A.

2018-01-01

The diffusion of oxygen in dense ceramics of monoclinic HfO2 was studied by means of (18O/16O) isotope exchange annealing and subsequent determination of isotope depth profiles by Secondary Ion Mass Spectrometry. Anneals were performed in the temperature range of 573 ≤T /K ≤ 973 at an oxygen partial pressure of p O2=200 mbar . All measured isotope profiles exhibited two features: the first feature, closer to the surface, was attributed mainly to slow oxygen diffusion in an impurity silicate phase; the second feature, deeper in the sample, was attributed to oxygen diffusion in bulk monoclinic HfO2 . The activation enthalpy of oxygen tracer diffusion in bulk HfO2 was found to be ΔHD∗≈0.5 eV .

76 FR 31457 - Airworthiness Directives; Diamond Aircraft Industries GmbH Model DA 42 Airplanes

Science.gov (United States)

2011-06-01

... Airworthiness Directives; Diamond Aircraft Industries GmbH Model DA 42 Airplanes AGENCY: Federal Aviation... reportedly found on DA 42 Main Landing Gear (MLG) Damper-to-Trailing Arm joints during standard maintenance... DA 42 Main Landing Gear (MLG) Damper-to-Trailing Arm joints during standard maintenance. Depending on...

NKS-B NordRisk II: Nuclear risk from atmospheric dispersion in Northern Europe - Summary report

International Nuclear Information System (INIS)

Lauritzen, B.

2011-05-01

The objective of the NordRisk II project has been to derive practical means for assessing the risks from long-range atmospheric dispersion of radioactive materials. An atlas over different atmospheric dispersion and deposition scenarios has been developed using historical numerical weather prediction (NWP) model data. The NWP model data covers three years spanning the climate variability associated with the North Atlantic Oscillation, and the atlas considers radioactive releases from 16 release sites in and near the Nordic countries. A statistical analysis of the long-range dispersion and deposition patterns is undertaken to quantify the mean dispersion and deposition as well as the variability. Preliminary analyses show that the large-scale atmospheric dispersion and deposition is near-isotropic, irrespective of the release site and detailed climatology, and allows for a simple parameterization of the global dispersion and deposition patterns. The atlas and the underlying data are made available in a format compatible with the ARGOS decision support system, and have been implemented in ARGOS. (Author)

NKS-B NordRisk II: Nuclear risk from atmospheric dispersion in Northern Europe - Summary report

Energy Technology Data Exchange (ETDEWEB)

Lauritzen, B. (Technical Univ. of Denmark, Risoe National Lab. for Sustainable Energy. Radiation Research Div., Roskilde (Denmark))

2011-05-15

The objective of the NordRisk II project has been to derive practical means for assessing the risks from long-range atmospheric dispersion of radioactive materials. An atlas over different atmospheric dispersion and deposition scenarios has been developed using historical numerical weather prediction (NWP) model data. The NWP model data covers three years spanning the climate variability associated with the North Atlantic Oscillation, and the atlas considers radioactive releases from 16 release sites in and near the Nordic countries. A statistical analysis of the long-range dispersion and deposition patterns is undertaken to quantify the mean dispersion and deposition as well as the variability. Preliminary analyses show that the large-scale atmospheric dispersion and deposition is near-isotropic, irrespective of the release site and detailed climatology, and allows for a simple parameterization of the global dispersion and deposition patterns. The atlas and the underlying data are made available in a format compatible with the ARGOS decision support system, and have been implemented in ARGOS. (Author)

76 FR 14346 - Airworthiness Directives; Diamond Aircraft Industries GmbH Model DA 42 Airplanes

Science.gov (United States)

2011-03-16

... Industries GmbH Model DA 42 Airplanes AGENCY: Federal Aviation Administration (FAA), Department of... been reportedly found on DA 42 Main Landing Gear (MLG) Damper-to-Trailing Arm joints during standard... condition for the specified products. The MCAI states: Cracks have been reportedly found on DA 42 Main...

As faces e funções da tradução em sala de aula de LE.DOI: 10.5007/2175-7968.2011v1n27p161

OpenAIRE

Branco, Sinara de Oliveira

2011-01-01

Este artigo tem o objetivo de discutir e demonstrar como a tradução pode ser aplicada em sala de aula de línguas estrangeiras (LE) de forma eficaz, sem interferir negativamente na aquisição da língua estrangeira e utilizando, em casos específicos, a língua materna (LM) ou a própria LE como recurso tradutório. Para tanto, a Abordagem Funcionalista da Tradução de Nord (1997) será utilizada como base teórica, bem como as categorias de tradução de Jakobson (2000). A partir da discussão da teoria,...

Les déterminants internes qui évaluent la performance des banques islamiques : cas de la zone de Moyen Orient et Afrique du Nord

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Hayet Dami

2017-09-01

Full Text Available Le but de cette recherche est d’étudier les déterminants internes qui évaluent la performance des 22 banques islamiques cotées en Bourse et ils ont appliqué la même norme comptable internationale dans la zone de Moyen Orient et Afrique du Nord en utilisant une analyse des indicateurs financiers tels que la rentabilité, la liquidité, la solvabilité et le risque de crédit, l’adéquation du capital, l’efficacité opérationnelle et l’efficacité d’allocation des ressources. Nous avons utilisé un modèle MCO avec une régression linéaire multiple comprenant de la variable dépendante (ROA ou ROE et de nombreuses variables indépendantes selon les données du panel. Les résultats empiriques indiquent que la liquidité, l’adéquation du capital, l’efficacité opérationnelle et l’efficacité d’allocation des ressources sont des déterminants significatifs dans notre étude. Par contre, les indicateurs de risque du crédit et la solvabilité ne sont pas significatifs pour évaluer la performance des banques islamiques au Moyen Orient et Afrique du Nord. Notre résultat est robust.

Application of resistivity measurements to research on structural elements in the Nord-Limousin (France) uraniferous basin (1960)

International Nuclear Information System (INIS)

Sarcia, J.A.; Bonnet, J.; Combe, R.

1960-01-01

The authors discuss the difficulties encountered in the exploration of a typical deposit in the Nord-Limousin, using the resistivity measurement method. In the zone in question the over-thrust was very variable and difficult to predict. The uraniferous deposits had two types of aspect, the passage from one to the other being often very sudden: long thin veins without gangue; short and thick lens-shape deposits which were strongly contaminated by clay towards their edges. After several unsatisfactory attempts, the device known as the 'rectangular map' was adopted and gave an acceptable structural representation rapidly and cheaply. For the placing of the probes however, methods are required which are more refined and sensitive. It is in any case useless to expect to obtain a satisfactory representation and a sufficient accuracy using a single technique; especially in the region under consideration. (author) [fr

SCI-NutriNord - a Nordic Initiative on Patient Education on Nutrition for People with Spinal Cord Injury (SCI)

DEFF Research Database (Denmark)

Steensgaard, Randi

2017-01-01

People with SCI are at high risk of developing secondary conditions of which several are linked to nutrition: overweight/obesity, chronic constipation and/or diarrhea and pressure sores are some examples. Proper nutrition is imperative to prevent and treat these conditions. However, there is a lack...... of evidence-based information materials about healthy eating for people with SCI at least in the Nordic languages. The aim of this multidisciplinary workshop is to: A. Inform about SCI-NutriNord and the first steps that have been taken in developing materials on nutrition as educational teaching aids...... to malnutrition Target group for this workshop is persons who have an interest in problem areas linked to nutrition and SCI, and who want to take part in the development of relevant patient education materials....

El precio de la fidelidad : La guerra de Sucesión en el Río de la Plata, los intereses locales y el bando Borbón

OpenAIRE

Jumar, Fernando Alberto; Molinié, A.; Merle, A.

2004-01-01

La guerra, como lo subraya Fernand Braudel, siempre pone en movimiento las flrees enproflndeur que son las economías, los Estados, las civilizaciones. Como este mismo autor constata, después de la batalla de Lepanto el escenario de la guerra pasa del Mediterráneo «au Nord, a l'Ouest sur I'Atlantique - et pour des siecles -la où elle doit etre, la oú bat le coeur du monde». Y en el extremo sur del Atlántico ocupado por los europeos en los tiempos modernos, está el Río de la Plata, y la guerra ...

Estimation de l'aléa sismique dans les Andes nord équatoriennes

Directory of Open Access Journals (Sweden)

1996-01-01

Full Text Available Les Andes Nord équatoriennes ont connu de nombreux séismes historiques destructeurs. Pour caractériser l’aléa sismique de la région andine, nous avons fait une révision critique de la sismicité historique et de l’ensemble des failles actives de l’Équateur. Les deux sources majeures de l’aléa sismique sont respectivement la subduction superficielle pour la région côtière et le système transpressif des hautes Andes pour la région andine. Ce système est composé de failles décrochantes dextres d’orientation N30-35°E (failles du Rio Chingual-La Sofia et Pallatanga qui limitent respectivement au Nord et au Sud des failles inverses N-S du relais compressif de la vallée interandine (failles de Quito et de Latacunga. L’étude des mécanismes au foyer superficiels des Andes équatoriennes nous a permis de calculer une vitesse de raccourcissement crustal de 4.6 mm/a selon une direction N92°E et d’estimer des temps de récurrence et des périodes de retour. Un séisme de Mw = 5 pourrait se produire tous les 0.5 an, de Mw = 6 tous les 4.5 ans, de Mw = 7 tous les 45.4 ans. De même, sur une période de temps de 33 ans, 66 séismes de Mw=5 peuvent être attendus, 7 séismes de Mw=6 et 1 séisme de Mw=7. Enfin, nous avons estimé pour l’ensemble des sources sismogènes de la région andine des magnitudes maximales probables et des temps de récurrence. Un séisme de magnitude 7 à 7.5 peut se produire sur la faille du Rio Chingual tous les 400±440 ans et de magnitude 6.7 à 7.2 tous les 380±320 ans sur la faille de Pallatanga. Dans la vallée interandine, la faille de Quito est susceptible d’engendrer un séisme de magnitude 6.6 à 7.6 tous les 930±300 ans. LA AMENAZA SÍSMICA EN LOS ANDES ECUATORIANOS. Los Andes del Norte del Ecuador son una región sismogénica mayor, donde se puede contabilizar muchos terremotos históricos destructores. A fin de determinar la amenaza sísmica sobre la región andina, se hizo la asociaci

1D models for condensation induced water hammer in pipelines

International Nuclear Information System (INIS)

Bloemeling, Frank; Neuhas, Thorsten; Schaffrath, Andreas

2013-01-01

Condensation induced water hammer (CIWH) are caused by contact of steam and subcooled water. Thus, modeling the direct contact condensation is a crucial step towards the simulation of condensation induced water hammer with 1D pressure surge codes. Therefore, also the TUeV NORD SysTec GmbH and Co. KG inhouse pressure surge code DYVRO has been equipped with a new contact condensation model. The validation of DYVRO against an experiment dealing with CIWH is presented in this contribution. (orig.)

1D models for condensation induced water hammer in pipelines

Energy Technology Data Exchange (ETDEWEB)

Bloemeling, Frank; Neuhas, Thorsten; Schaffrath, Andreas [TUEV NORD SysTec GmbH und Co. KG, Hamburg (Germany)

2013-03-15

Condensation induced water hammer (CIWH) are caused by contact of steam and subcooled water. Thus, modeling the direct contact condensation is a crucial step towards the simulation of condensation induced water hammer with 1D pressure surge codes. Therefore, also the TUeV NORD SysTec GmbH and Co. KG inhouse pressure surge code DYVRO has been equipped with a new contact condensation model. The validation of DYVRO against an experiment dealing with CIWH is presented in this contribution. (orig.)

76 FR 54373 - Airworthiness Directives; Austro Engine GmbH Model E4 Diesel Piston Engines

Science.gov (United States)

2011-09-01

... diesel piston engines, with high-pressure (HP) fuel pump, part number (P/N) E4A- 30-100-000, installed... Airworthiness Directives; Austro Engine GmbH Model E4 Diesel Piston Engines AGENCY: Federal Aviation... pressure supply for excessive oscillations to determine if high-pressure (HP) fuel pumps have been exposed...

O ensino de gêneros textuais na formação de tradutores

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Valdecy de Oliveira Pontes

2017-02-01

Full Text Available No contexto nacional, algumas investigações aplicadas ao Ensino de Língua Espanhola na Educação Superior aliam o procedimento de Sequência Didática (SD com o processo tradutório, a saber, Barrientos (2014 e Laiño (2014. As pesquisas atestam que essa prática proporcionam a escrita competente, além da conscientização de semelhanças e diferenças linguístico-culturais e a compreensão do processo tradutório. Assim, neste artigo, objetivamos ilustrar uma proposta de SD, a partir da tradução do gênero textual conto, com vistas à formação de tradutores. Para tanto, esta proposta se fundamenta na Teoria da Tradução Funcionalista, com a perspectiva de Christiane Nord (1991, 1994, 2009, 2012, além de pesquisas sobre o procedimento de SD, elaborado pelo Grupo de Genebra e adaptado pela vertente brasileira, tais como: Dolz, Pasquier e Bronckart (1993, Dolz, Noverraz e Schneuwly (2004, Machado e Cristóvão (2006, Barros (2012, Costa-Hürbes e Simioni (2014, entre outras. Acredita-se que esse procedimento, na formação de tradutores, poderá permitir não somente o domínio de gêneros textuais em uma língua e cultura base (de partida, mas a percepção das semelhanças e diferenças linguísticas, textuais, pragmáticas e culturais em ambas as línguas e culturas envolvidas no processo tradutório. Também, poderá proporcionar o desenvolvimento de capacidades de linguagem nas Línguas Estrangeira e Materna do futuro tradutor e a abordagem de diferentes dificuldades e problemas de tradução.

Source apportionment of particles at Station Nord, North East Greenland during 2008–2010 using COPREM and PMF analysis

Directory of Open Access Journals (Sweden)

Q. T. Nguyen

2013-01-01

Full Text Available In order to develop strategies for controlling and reducing Arctic air pollution, there is a need to understand the basic mechanisms for determining the fate of air pollution in the Arctic. Sources of atmospheric particles at Station Nord (81° 36' N, 16° 40' W in North East Greenland were evaluated for a two-year period from March 2008 to February 2010. Source apportionment using Positive Matrix Factorization (PMF and COnstrained Physical REceptor Model (COPREM was based on measurements of black carbon, elements (Al, Si, S, K, Ca, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, Ga, As, Se, Br, Rb, Sr, Zr, Pb and inorganic ions (SO₂, SO₄²⁻, Na⁺, NH₄⁺, NO₃⁻, Cl²⁻. In general, source apportionment results by PMF and COPREM showed good agreement. Five sources adequately explained the measurements, which included a Marine and a Soil source of natural origin and three additional anthropogenic sources, which were all influenced by metal industries. One anthropogenic source was dominated by Zn of which air mass back trajectories using the Hybrid Single Particle Lagrangian Integrated Trajectory (HYSPLIT model suggested a Canadian Arctic origin, despite certain influences from Southern and Eastern origins. Another anthropogenic source was characterised by high concentrations of Pb and As, which has been historically referred to as a Combustion source at Station Nord. The impacts of large-scale industry in Siberia, Russia were evident through high Cu concentrations in both the Combustion source and an additional Cu/Ni source.

Br correlated well with the anthropogenic species S and Pb though the elements are unlikely to have a common origin. More likely, sulphuric acid aerosols serve as transport containers for Br species of marine origin. Of particular relevance to climate, sources of black carbon were identified to be

75 FR 68179 - Airworthiness Directives; Austro Engine GmbH Model E4 Diesel Piston Engines

Science.gov (United States)

2010-11-05

... Airworthiness Directives; Austro Engine GmbH Model E4 Diesel Piston Engines AGENCY: Federal Aviation... pumps failed as a result of pressure oscillations in the fuel supply line. We are issuing this AD to.... Analyses have shown that high pressure (HP) fuel pumps failed as a result of pressure oscillations in the...

Etude nutritive des plats alimentaires et des produits laitiers dans la région de l'extrème-nord Cameroun

OpenAIRE

Ponka, Roger

2013-01-01

Au cours de ce stage effectué du 06 Novembre 2012 au 01 février 2013, à l’’Unité Mixte de Recherche Science et Technologie du Lait et de l’oeuf de l’INRA Agrocampus-Ouest de Rennes (France), nous avons déterminé la composition nutritionnelle des plats alimentaires et des produits laitiers de la région de l’Extrême-Nord du Cameroun. Ainsi, les teneurs en protéines, lipides, minéraux, acides aminés, vitamines ont été déterminées par les méthodes de référence. La table de composition des aliment...

"Si le fleuve se tord, que le crocodile se torde" : une analyse des systèmes agraires de la région nord-ouest du Burkina Faso à l'aide des modèles de programmation mathématique

NARCIS (Netherlands)

Maatma, Arnoldus Johannes

2000-01-01

Le présente étude a pour but d'analyser les perspectives d'intensification durable des systemes de production agricole dans la région Nord-Quest du Burkina Faso par des techniques a faibles couts. Zie: Résumé

Informação, assimetria de informações e regulação do mercado de saúde suplementar Information, asymmetry of information and regulation of the suplemental health market

Directory of Open Access Journals (Sweden)

Clóvis Ricardo Montenegro de Lima

2006-01-01

Full Text Available A informação é condição para a democracia. As redes sociais são relevantes nas formações culturais atuais, sendo modo privilegiado de produção e disseminação de informação. As novas tecnologias facilitam registro, publicação e difusão de documentos e informações, especialmente através da internet. A ética da discussão orientada para o entendimento implica no agir comunicativo com base em argumentos racionais. A assimetria de informações entre atores nos mercados requer regulação do Estado. O mercado funciona geralmente de modo imperfeito, sendo muitas vezes incapaz de apresentar preço e outras condições de oferta socialmente aceitáveis. No mercado de saúde suplementar existem, aproximadamente, 2.200 operadoras que incluem 40 milhões de beneficiários. A Agência Nacional de Saúde Suplementar regula o setor a partir dos marcos estabelecidos nas Leis n. 9656/98 e n. 9961/00. A produção, o processamento e o compartilhamento de informações podem ser importantes ferramentas de regulação.Information is a necessary condition for democracy. The social networks are relevant in today’s cultural development since they are a priviledged means to produce and broadcast information. New technologies make it easier to store and publish files, specially with the Internet. The discussion ethics which aims common agreement between the parties implies the need for a communicative behavior based on rational propositions. Information asymmetries among market players create the need for regulation. The market usually works in an imperfect way, so that very often it is unable to disclosure information about prices and other socially acceptable supply conditions. Health care frameworks are different according to the social-cultural context. The Brazilian private health insurance market has about 2,200 insurers and covers 40 million beneficiaries. ANS (Agência Nacional de Saúde Suplementar, the Brazilian regulatory agency for

Processus d'innovation et recomposition des territoires agricoles : le cas du semis sous couvert végétal au nord du Cameroun

OpenAIRE

Dugué, Patrick; Olina Bassala, Jean-Paul

2015-01-01

Au nord du Cameroun, l'adoption des systèmes de culture sous couvert végétal (SCV) butte sur le partage des résidus de culture fourragers en saison sèche entre le bétail et la couverture du sol. Elle nécessite donc d'accroître l'offre fourragère et de prendre en compte les différents types d'élevage (villageois, semi-sédentaire, transhumant, etc.). Dans les conditions actuelles de pratique des SCV par les producteurs (faible couverture du sol, peu d'années successives en SCV) les effets atten...

L'exemple d'un décor religieux dans le nord de la France : Bruno Chérier (1817-1880 et Notre-Dame-des-Anges de Tourcoing

Directory of Open Access Journals (Sweden)

Catherine Guillot

2012-04-01

Full Text Available Ami et modèle du sculpteur Jean-Baptiste Carpeaux, Bruno Chérier (1817 Valenciennes, 1880 Paris se consacre à partir de la fin des années 1850 jusqu'à sa mort au décor religieux dans le nord de la France. Devenu en 1852 professeur aux écoles académiques de Tourcoing, il répond aux commandes les plus variées dans le domaine de l'art religieux. Ainsi, sa participation au décor de l'église Notre-Dame-des-Anges de Tourcoing est exemplaire de la diversité de ses contributions : chemin de croix, cartons de vitraux, peintures ornementales illusionnistes. Cette église constitue en outre dans le Nord un des rares témoignages conservé presque intégralement de l'art religieux dans la seconde moitié du XIXe siècle. La collaboration de Chérier à ce chantier témoigne d'un statut de l'artiste sous le Second Empire, éloigné de l'image romantique du créateur libre dont est redevable le mythe constitué autour de la figure de Carpeaux.Les auteurs préparent une étude globale de l'œuvre de Bruno Chérier et de son rôle auprès de Carpeaux.

L’archipel nord-coréen: transition économique et blocages territoriaux

Directory of Open Access Journals (Sweden)

César Ducruet

2007-09-01

Full Text Available L’une des caractéristiques récentes de la Corée du Nord est le manque manifeste d’intégration territoriale, en contradiction croissante avec la volonté d’ouverture économique. Dans un environnement mondialisé, le faible coût et la qualité de sa main-d’œuvre, l’abondance des ressources naturelles, et une situation stratégique entre la Corée du Sud, le Japon et leurs voisins continentaux immédiats comme la Chine et la Russie, sont autant d’atouts qui devraient permettre la mise en œuvre des réformes et la relance de l’économie. Tandis que la plupart des travaux précédents se basent sur les facteurs politiques externes pour expliquer les difficultés rencontrées (isolement dû à la disparition du bloc de l’Est, embargo imposé par les États-Unis et le Japon, cet article privilégie les facteurs spatiaux internes. L’examen successif de structures spatiales fondamentales montre que la déconnexion croissante entre les différentes provinces, conséquence d’un long déclin économique et de la dégradation des infrastructures, serait une contrainte majeure avec laquelle les projets de développement du pays sont confrontés, au-delà des aspects purement politiques.

NKS NordRisk II: Atlas of long-range atmospheric dispersion and deposition of radionuclides from selected risk sites in the Northern Hemisphere

International Nuclear Information System (INIS)

Smith Korsholm, U.; Havskov Soerensen, J.; Astrup, P.; Lauritzen, B.

2011-04-01

The present atlas has been developed within the NKS/NordRisk-II project 'Nuclear risk from atmospheric dispersion in Northern Europe'. The atlas describes risks from hypothetical long-range dispersion and deposition of radionuclides from 16 nuclear risk sites on the Northern Hemisphere. The atmospheric dispersion model calculations cover a period of 30 days following each release to ensure almost complete deposition of the dispersed material. The atlas contains maps showing the total deposition and time-integrated air concentration of Cs-137 and I-131 based on three years of meteorological data spanning the climate variability associated with the North Atlantic Oscillation, and corresponding time evolution of the ensemble mean atmospheric dispersion. (Author)

Les premiers temps de l'architecture en briques au nord des Alpes : la question de l'origine cistercienne vue des Pays-Bas

OpenAIRE

Lehouck, Alexander

2017-01-01

L'argile est l'une des plus vieilles matières premières pour la fabrication de matériaux de construction. La chute de l'Empire romain a marqué la fin de l'utilisation de la brique au nord des Alpes. La brique ne ressurgit véritablement qu' à partir de la deuxième moitié du XIIe s. et de la première moitié du XIIe s.; dans la deuxième moitié du XIIIe s., la brique était devenue le matériau de construction le plus utilisé. Dans cet article, nous discutons les données concernant les premiers ...

NKS NordRisk II: Atlas of long-range atmospheric dispersion and deposition of radionuclides from selected risk sites in the Northern Hemisphere

Energy Technology Data Exchange (ETDEWEB)

Smith Korsholm, U.; Havskov Soerensen, J. (Danish Meteorological Institute (DMI), Copenhagen (Denmark)); Astrup, P.; Lauritzen, B. (Technical Univ. of Denmark, Risoe National Lab. for Sustainable Energy. Radiation Research Div., Roskilde (Denmark))

2011-04-15

The present atlas has been developed within the NKS/NordRisk-II project 'Nuclear risk from atmospheric dispersion in Northern Europe'. The atlas describes risks from hypothetical long-range dispersion and deposition of radionuclides from 16 nuclear risk sites on the Northern Hemisphere. The atmospheric dispersion model calculations cover a period of 30 days following each release to ensure almost complete deposition of the dispersed material. The atlas contains maps showing the total deposition and time-integrated air concentration of Cs-137 and I-131 based on three years of meteorological data spanning the climate variability associated with the North Atlantic Oscillation, and corresponding time evolution of the ensemble mean atmospheric dispersion. (Author)

Cooperation of the private companies Groupe Intra and Kerntechnische Hilfsdienst GmbH

International Nuclear Information System (INIS)

Dumas, J.; Neumann, W.

1999-01-01

For supporting companies running nuclear power plants and for eliminating the effects of an accident, Kerntechnischer Hilfsdienst GmbH (KHG) was founded in Germany in 1977 whereas Groupe Intra (GIE) was founded in France 1988. Since the activities and responsibilities of the two companies are partly the same, they got into contact rather early, at that time with the intention to exchange experience. However, in 1993 the intensified contact resulted in signing an agreement on mutual assistance. In the following passage, a general idea is given of both organisations, the agreement on mutual assistance and the experience of cooperation they have had so far. (orig.) [de

Ce que nous faisons | Page 167 | CRDI - Centre de recherches pour ...

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

Modèles commerciaux libres (Amérique latine). Le Centro de Tecnologia e Sociedade (CTS - centre pour la technologie et la société) fait partie de la Faculté de droit de la Fundação Getulio Vargas à Rio de Janeiro. Brésil, Amérique Du Sud, Nigéria, Nord Du Sahara, Sud Du Sahara, Amérique Nord Et Centrale. PROJECT ...

Le néogène de la chaine du Pentadaktylos et de la partie nord de la Mésaoria (Chypre. Etude stratigraphique et micropaléontologique The Neofene in the Pentadaktylos Range and Nothern Mesaoria, Cyprus. Stratigraphic and Micropaleontological Investigations

Directory of Open Access Journals (Sweden)

Baroz F.

2006-11-01

Full Text Available La formation de Kithréa est une puissante série détritique, le plus souvent rythmique, déposée dans un bassin subsident, de part et d'autre de la chaîne du Pentadaktylos. Vers le nord, elle disparaît sous la mer; vers le sud, elle affleure largement dans la moitié nord de la Mesaoria jusque dans la région de i'Ovgos Potamos. Une étude lithologique et micropaléontologique a permis d'y distinguer 9, unités cartographiques correspondant à une échelle stratigraphique qui va de l'Eocène supérieur (? au Messinien évaporitique. Le Pliocène transgressif inaugure un nouveau cycle de sédimentation. Plusieurs biozones de Foraminifères planctoniques ont été reconnues. Leur succession dans le temps est sensiblement analogue à celle déjà distinguée en Méditerranée occidentale depuis l'Oligocène jusqu'au Pliocène moyen. La formation de Kithréa appartient à deux domaines paléogéographiques séparés par l'importante faille de Kithréa, de direction E-O. Au nord, dans un domaine « pentadaktylien », une série relativement diversifiée se dépose en transgression sur la chaîne. Au sud, dans un domaine « mésaorien », la série sédimentaire repose en concordance sur des dépôts crayeux qui s'étendent, vers le sud, jusqu'au Troodos. The Kithrea Formation is a thick detrital series, usually rhythmic deposited in subsident basin on both sides of teé Pentadaktylos Range. Toward the North it disappears underneath the sec. Toward the South it outcrops widely in the northern half of Mesaoria ranging to the Ovgos Potamos crea. A lithological and micropaleontological study reveals 9 formations corresponding to a stratigraphic scale ranging from fhe lace Eocene (? to the evaporitic Messinian. With the transgression of Pliocene, appears a new sedimentation cycle. Several planktonic foraminifera biozones have been identified. Their succession on time is quite similar to what hod previously been found in the western Mediterranean from

Specialized meeting on 'Current topics of reactor safety research in Germany'

International Nuclear Information System (INIS)

Kruessenberg, Anne

2013-01-01

On October 11 and 12, 2012, the 2-day specialized meeting organized by the Thermodynamics and Fluid Dynamics Group together with the Dresden-Rossendorf Helmholtz Center and TUeV NORD SysTec GmbH and Co.KG was held at the Dresden-Rossendorf Helmholtz Center within the series of events on 'Current Topics of Safety Research in Germany.' The program of lectures was supplemented by poster presentations and exhibitions by the members of the joint research groups and companies working in the fields. The meeting again was very well attended by over 100 persons. (orig.)

Spectroscopic properties and energy transfer analysis of Tm3+-doped BaF2-Ga2O3-GeO2-La2O3 glass.

Science.gov (United States)

Yu, Shenglei; Yang, Zhongmin; Xu, Shanhui

2010-05-01

This paper reports on the spectroscopic properties and energy transfer analysis of Tm(3+)-doped BaF(2)-Ga(2)O(3)-GeO(2)-La(2)O(3) glasses with different Tm(2)O(3) doping concentrations (0.2, 0.5, 2.0, 2.5, 3.0, 3.5, 3.5, 4.0 wt%). Mid-IR fluorescence intensities in the range of 1,300 nm-2,200 nm have been measured when excited under an 808 nm LD for all the samples with the same pump power. Energy level structure and Judd-Ofelt parameters have been calculated based on the absorption spectra of Tm(3+), cross-relaxation rates and multi-phonon relaxation rates have been estimated with different Tm(2)O(3) doping concentrations. The maximum fluorescence intensity at around 1.8 mum has been obtained in Tm(2)O(3)-3 wt% sample and the maximum value of calculated stimulated emission cross-section of Tm(3+) in this sample is about 0.48 x 10(-20) cm(2) at 1,793 nm, and there is not any crystallization peak in the DSC curve of this sample, which indicate the potential utility of Tm(3+)-doped BaF(2)-Ga(2)O(3)-GeO(2)- La(2)O(3) glass for 2.0-microm optical fiber laser.

Neutron diffraction investigation for possible anisotropy within monolithic Al2O3/Y-TZP composites fabricated by stacking together cast tapes

International Nuclear Information System (INIS)

Ruiz-Hervias, J.; Bruno, G.; Gurauskis, J.; Sanchez-Herencia, A.J.; Baudin, C.

2006-01-01

The development of residual stresses in two Al 2 O 3 + 5 vol.% yttria-tetragonal zirconia polycrystal (Y-TZP) ceramic composites fabricated by conventional slip casting and by joining green cast tapes was investigated. Neutron diffraction profiles revealed compressive microstresses (-200 MPa) in the Al 2 O 3 matrix and tensile ones (2200 MPa) in the Y-TZP particles, irrespective of the processing route and the direction of measurement, which demonstrates the lack of residual macrostresses due to the joining procedure

Catalyst growth of single crystal aligned ZnO nanorods on ZnO thin films

Energy Technology Data Exchange (ETDEWEB)

Zhao, Dongxu; Andreazza, Caroline; Andreazza, Pascal [Centre de Recherche sur la Matiere Divisee, CNRS-Universite d' Orleans, 1b rue de la Ferollerie, 45071 Orleans cedex 2 (France)

2005-02-01

One dimensional ZnO nanorods were successfully fabricated on Si substrates via a simple physical vapor-phase transport method at 950 C. A ZnO shell covered Au/Zn alloy is assumed as the nucleation site, then ZnO nanorods grow following a vapor-solid (VS) process. In order to guide the nanorod growth a c-axis oriented ZnO thin film and Au catalyst were first deposited on Si (100) surface. SEM images show nanorods grown on this substrate are vertical to the substrate surface. (copyright 2005 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Bilateral contracts and the spot market for electricity: some observations on the British and the NordPool experiences

International Nuclear Information System (INIS)

Herguera, Inigo

2000-01-01

The performance of the futures and the spot market for electricity in England and Wales (EW) and in the Nordic countries have significant differences in terms of volumes traded and evolution of prices. Even though the institutional arrangements show significant differences and the data collected has important limitations we observe in EW for 1990-199 that as the coverage via bilateral contracts diminished, spot prices tended to increase, there was higher price volatility and an increasing number of plants were declared unavailable. In the NordPool, by contrast, market structure is more distributed, the bilateral contract price has tended to smooth the volatility in the spot price and a very diverse pattern behavior of prices has been observed. We interpret these observations as additional support in favor of the theoretical result by and Vila (Journal of Economic Theory 59 (1993) 1), but hint at the possibility of strategies by the firms that can diminish the welfare enhancing properties of this new bilateral market. (Author)

CONDITIONING OF INTERMEDIATE-LEVEL WASTE AT FORSCHUNGSZENTRUM JUELICH GMBH

International Nuclear Information System (INIS)

Krumbach, H.

2003-01-01

This contribution to the group of low-level, intermediate, mixed and hazardous waste describes the conditioning of intermediate-level mixed waste (dose rate above 10 mSv/h at the surface) from Research Centre Juelich (FZJ). Conditioning of the waste by supercompaction is performed at Research Centre Karlsruhe (FZK). The waste described is radioactive waste arising from research at Juelich. This waste includes specimens and objects from irradiation experiments in the research reactors Merlin (FRJ-1) and Dido (FRJ-2) at FZJ. In principle, radioactive waste at Forschungszentrum Juelich GmbH is differentiated by the surface dose rate at the waste package. Up to a surface dose rate of 10 mSv/h, the waste is regarded as low-level. The radioactive waste described here has a surface dose rate above 10 mSv/h. Waste up to 10 mSv/h is conditioned at the Juelich site according to different conditioning methods. The intermediate-level waste can only be conditioned by supercompaction in the processing facility for intermediate-level waste from plant operation at Research Centre Karlsruhe. Research Centre Juelich also uses this waste cell to condition its intermediate-level waste from plant operation

Sales controlling comes into view. MIS (management information system) Deutschland GmbH fits energy suppliers; Vertriebscontrolling in Sicht. MIS Deutschland GmbH macht Energieversorger fit

Energy Technology Data Exchange (ETDEWEB)

Anon.

2002-03-01

MIS has integrated Microsoft-Excel efficiently, so appliers must not change other systems, can utilize advantages and know how and further functionalities like optimization of planning processes, automation of data processing, generation of a data base with structured information of energy data are available for customers.(GL) [German] Die MIS Deutschland GmbH wurde 1988 gegruendet. Die Gruender waren Studenten der Universitaet Darmstadt. Einer von ihnen ist noch heute Vorstandsvorsitzender der MIS AG. Schon damals hatte man die Vision, Manager oder die Entscheidungstraeger in Unternehmen mit Informationen zu versorgen und in die Lage zu versetzen, diese auch nach ihren Beduerfnissen auswerten, analysieren und reporten zu koennen. Dadurch entstand 1988 in Zusammenarbeit mit Microsoft die erste Microsoft-Excel-Konferenz in Deutschland. MIS hat Microsoft-Excel leistungsfaehig integriert, sodass der Anwender nicht auf ein anderes System umlernen muss, sondern die Vorteile und das Know-how Weiterverwenden kann und zusaetzlich weitere Funktionalitaeten zur Verfuegung gestellt bekommt. (orig.)

Comparação de sistemas de avaliação de dietas para bovinos no modelo de produção intensiva de carne. Suplementação do pasto para vacas na estação seca

Directory of Open Access Journals (Sweden)

Sampaio Alexandre Amstalden Moraes

2001-01-01

Full Text Available Foram utilizadas 30 vacas da raça Canchim com 50 meses de idade e peso corporal médio de 471 kg, que receberam suplemento alimentar durante a estação seca de 1998, objetivando avaliar a precisão no desempenho estimado por diferentes sistemas de avaliação de dietas. Os suplementos, à base de silagem de milho, milho, polpa cítrica peletizada, farelo de algodão, farelo de soja e soja integral, seguiram as recomendações do Sistema de Proteína Metabolizável (MP; do Sistema de Proteína e Carboidratos Líquidos de Cornell (CNCPS; e do Sistema de Proteína Digestível no Intestino (PDI, para manutenção do peso corporal. A variação diária de peso corporal obtida não diferiu entre os tratamentos CNCPS, MP e PDI, com médias de 0,34; 0,33; e 0,19 kg/cab, respectivamente. Quando a produção de carne constituiu-se no objetivo único do sistema produtivo, a análise econômica revelou saldo de R$22,00; R$-44,73; e R$47,27/ha/ano, para os sistemas CNCPS, MP e PDI, respectivamente. Concluiu-se que os suplementos avaliados pelos sistemas proporcionaram resultados de desempenho animal compatíveis com os estimados.

Place à l'adaptAction | CRDI - Centre de recherches pour le ...

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

22 févr. 2011 ... Place à l'adaptAction — Protéger les collectivités côtières du nord du Maroc par Mary O'Neill Les régions rurales de la côte du nord-est du Maroc sont de plus en plus vulnérables aux effets des changements climatiques. Une équipe de recherche internationale réalise une étude participative dans deux ...

Preparation of tetrapod-like ZnO/TiO{sub 2} core-shell nanostructures as photocatalytic powder

Energy Technology Data Exchange (ETDEWEB)

Sartori, A.; Visentin, F.; De Zorzi, C.; Natali, M.; Gerbasi, R.; Rossetto, G. [ICIS-DPM-CNR, Padova (Italy); El Habra, N. [ICIS-DPM-CNR, Padova (Italy); Dipartimento di Scienze Chimiche, Padova (Italy); Garoli, D. [Dipartimento di Fisica, Padova (Italy); LANN, Padova (Italy); Casarin, M. [Dipartimento di Scienze Chimiche, Padova (Italy)

2011-08-15

The coupling of zinc oxide tetrapods (t-ZnO) with anatase TiO{sub 2} in the form of CVD coatings on ZnO nanotetrapods was investigated. t-ZnO/TiO{sub 2} core-shell structures, consisting of uniformly and completely TiO{sub 2} covered ZnO nanotetrapods, were characterized by scanning electron microscopy, X-ray diffraction and UV-Vis spectra. Photocatalytic activity, determined by degradation of a sodium methyl red solution, was found to be comparable to pure t-ZnO, while improved separation easiness was verified that makes the presented powders promising for wastewater treatment. (copyright 2011 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Simulation of YBa{sub 2}Cu{sub 3}O{sub 7}/MgO surface growth

Energy Technology Data Exchange (ETDEWEB)

Mohammadizadeh, M.R. [Superconductivity Research Laboratory (SRL), Department of Physics, University of Tehran, North Karegar Ave., P.O. Box 14395-547, Tehran (Iran); Computational Physical Sciences Research Laboratory, Department of Nano-Science, Institute for Studies in Theoretical Physics and Mathematics (IPM), P.O. Box 19395-5531, Tehran (Iran); Safari, N.; Kia, M.; Savaloni, H. [Superconductivity Research Laboratory (SRL), Department of Physics, University of Tehran, North Karegar Ave., P.O. Box 14395-547, Tehran (Iran)

2006-09-15

For surface growth simulation of YBa{sub 2}Cu{sub 3}O{sub 7} on MgO substrate, binding energies between each two different Y, Ba, Cu, O, and Mg atoms were calculated by ab initio pseudopotential density functional theory approach. Then, simulation of YBa{sub 2}Cu{sub 3}O{sub 7} growth was performed by a simple two dimensional model based on the ballistic aggregation of hard discs. By increasing the substrate temperature, the atomic layers distribution is more condensed and the nanometric surface roughness decreases. (copyright 2006 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Are electricity risk premia affected by emission allowance prices? Evidence from the EEX, Nord Pool and Powernext

International Nuclear Information System (INIS)

Daskalakis, George; Markellos, Raphael N.

2009-01-01

The links between emission and energy markets are of great interest to practitioners, academics and policy makers. In this paper, it is conjectured that a positive relationship exists between emission allowance spot returns and electricity risk premia within the European Union Emissions Trading Scheme (EU ETS). We discuss how this can be justified on the basis of the substantial uncertainties in the carbon markets. We also argue that this link could be due to trading strategies followed by electricity producers who attempt to exploit their initial allocation of free allowances. Analysis of data from three major markets, the EEX, Nord Pool and Powernext, offers empirical support to our conjecture. These findings have significant policy implications since they imply that efforts should be made in order to reduce the uncertainty in the carbon markets by clearly defining the EU ETS regulative framework and design over the next years. Moreover, our results suggest that the allocation of free allowances and their unrestricted trading enable electricity producers to accomplish windfall profits in the derivatives market at the expense of other market participants. (author)

Ecodesenvolvimento da pesca artesanal em região costeira – estudos de caso no Norte e Nordeste do Brasil

Directory of Open Access Journals (Sweden)

Catherine Prost

2008-09-01

Full Text Available A pesca artesanal detém no Brasil um considerável peso econômico e social, especialmente nos Estados do Norte e Nordeste. Propõe-se aqui uma análise em escala local para iniciar uma reflexão sobre o desenvolvimento da pesca artesanal. O desenvolvimento local é entendido e defendido aqui como solidário ou alternativo ou ainda como ecodesenvolvimento. A escala local se justifica uma vez que é no lugar onde vão se imprimir as ações dos diversos atores e onde se forma o lócus da solidariedade orgânica. No Pará e na Baía do Iguape (BA, existem reservas extrativistas (resex marinhas, principalmente em áreas de manguezais, embora também abarquem ecossistemas de florestas de terra firme, várzeas, rios, estuários e zona marítima costeira. Nas resex, os pescadores artesanais exercem uma atividade muito influenciada pelas vicissitudes do tempo, embora o sistema de pesca (embarcação, apetrechos, tipo de captura possa amenizar um pouco os impactos em função do nível de tecnologia. Mais do que o nível de tecnologia empregado, o nível sócio-econômico dos pescadores é condicionado pela divisão do trabalho e pelo grau de organização social. No Pará, as resex já possuem associação de usuários além de conselhos fiscal e deliberativo, o que demonstra um processo muito dinâmico de construção social. A análise comparativa empreendida aqui mostra que sem um tecido social coeso e sem apoio governamental seguro, o processo de construção social avança em marcha lenta, como ilustra o exemplo da resex Baía do Iguape, na Bahia. No Pará, ainda restam muitos desafios a superar em busca de soluções economicamente mais rentáveis. Pode-se dizer que o principal benefício até hoje alcançado pelas comunidades extrativistas é o aumento de seu poder de embate político. Résumé ÉCODÉVELOPPEMENT DE LA PÊCHE ARTISANALE EN RÉGION CÔTIÈRE - ÉTUDES DE CAS DANS LE NORD ET NORD-EST DU BRÉSIL La pêche artisanale détient au Br

Participação do Mycoplasma pneumoniae na etiologia de infecções respiratórias agudas em Ribeirão Preto, São Paulo, Brasil

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Alcyone A. Machado

1991-03-01

Full Text Available Para avaliar a participação etiológica do Mycoplasma pneumoniae em infecções respiratórias agudas, o isolamento dessa bactéria foi tentado em secreções do aparelho respiratório de 64 pacientes (média 24 anos com quadro respiratório aguda Foi realizada, também, a pesquisa de anticorpos específicos anti-M. pneumoniae através da reação de fixação do complemento (FC e da reação de contra-imunoeletroforese (CIE. O M. pneumoniae não foi isolado. O diagnóstico presuntivo de infecção pelo M. pneumoniae foi feito pela FC em 3,1% (2/64 e pela CIE em 1,6% (1/64 dos pacientes. Paralelamente, em 200 indivíduos sadios, os mesmos testes sorológicos foram realizados, sendo o índice de positividade de 4% (8/200 pela CIE e de 1% (2/200 pela FC. Apesar das aiscrepâncias observadas entre os dois métodos sorológicos, a FC parece ser indicada para diagnóstico da infecção, sendo a CIE recomendada nas avaliações soroepidemiológicas. Com base nos dados do nosso estudo, a prevalência das infecções respiratórias pelo M. pneumoniae parece ser baixa em nosso meio.

Timing of metamorphism and exhumation in the Nordøyane ultra-high-pressure domain, Western Gneiss Region, Norway: New constraints from complementary CA-ID-TIMS and LA-MC-ICP-MS geochronology

Science.gov (United States)

Butler, J. P.; Jamieson, R. A.; Dunning, G. R.; Pecha, M. E.; Robinson, P.; Steenkamp, H. M.

2018-06-01

We present the results of a combined CA-ID-TIMS and LA-MC-ICP-MS U-Pb geochronology study of zircon and associated rutile and titanite from the Nordøyane ultra-high-pressure (UHP) domain in the Western Gneiss Region (WGR) of Norway. The dated samples include 4 eclogite bodies, 2 host-rock migmatites, and 2 cross-cutting pegmatites and leucosomes, all from the island of Harøya. Zircon from a coesite eclogite yielded an age of ca. 413 Ma, interpreted as the time of UHP metamorphism in this sample. Zircon data from the other eclogite bodies yielded metamorphic ages of ca. 413 Ma, 407 Ma, and 406 Ma; zircon trace-element data associated with 413 Ma and 407 Ma ages are consistent with eclogite-facies crystallization. In all of the eclogites, U-Pb dates from zircon cores, interpreted as the times of protolith crystallization, range from ca. 1680-1586 Ma, consistent with Gothian ages from orthogneisses in Nordøyane and elsewhere in the WGR. A zircon core age of ca. 943 Ma from one sample agrees with Sveconorwegian ages of felsic gneisses and pegmatites in the western part of the area. Migmatites hosting the eclogite bodies yielded zircon core ages of ca. 1657-1591 Ma and rim ages of ca. 395-392 Ma, interpreted as the times of Gothian protolith formation and Scandian partial melt crystallization, respectively. Pegmatite in an eclogite boudin neck yielded a crystallization age of ca. 388 Ma, interpreted as the time of melt crystallization. Rutile and titanite from 3 samples (an eclogite and two migmatites) yielded concordant ID-TIMS ages of 378-376 Ma. The results are similar to existing U-Pb data from other Nordøyane eclogites (415-405 Ma). In combination with previous pressure-temperature data from the coesite eclogite, these ages indicate that peak metamorphic conditions of 3 GPa/760 °C were reached ca. 413 Ma, followed by decompression to 1 GPa/810 °C by ca. 397 Ma and cooling below ca. 600 °C by ca. 375 Ma. The results are compatible with protracted UHP

THE MARKET POTENTIAL FOR ELECTRONIC PAYMENT APPLICATIONS IN GHANA AND UGANDA. CASE COMPANY– MAVIANCE GMBH

OpenAIRE

Terekhova, Mariia

2016-01-01

Nowadays, electronic payment solutions are widespread all around the world. Besides, their popularity is rapidly growing in emerging markets bringing numerous business opportunities to the international companies specializing in electronic payment systems. The aim of this thesis is to create a marketing strategy for the penetration of Ghana and Uganda with Smobilpay, which is an electronic payment application of Maviance GmbH. The research is done with the help of an analysis of the busin...

Growth kinetics and properties of ZnO/ZnMgO heterostructures grown by radical-source molecular beam epitaxy

Energy Technology Data Exchange (ETDEWEB)

Ivanov, S.V. [Institute of Semiconductor Technology, Technical University Braunschweig, Hans-Sommer-Str. 66, 38106 Braunschweig (Germany); Ioffe Physico-Technical Institute, Polytekhnicheskaya Street 26, 194021 St. Petersburg (Russian Federation); El-Shaer, A.; Bakin, A.; Waag, A. [Institute of Semiconductor Technology, Technical University Braunschweig, Hans-Sommer-Str. 66, 38106 Braunschweig (Germany); Shubina, T.V.; Listoshin, S.B. [Ioffe Physico-Technical Institute, Polytekhnicheskaya Street 26, 194021 St. Petersburg (Russian Federation)

2007-07-01

A phenomenological approach to quantitative description of Zn(Mg)O growth by radical-source molecular beam epitaxy, based on the experimental studies of RHEED intensity oscillations, has been developed. It allows a precise control of growth rate, composition and stoichiometry at any growth temperature, Along with optimization of a growth initiation procedure on a c-sapphire, it is necessary condition for fabrication of high quality ZnO epilayers and ZnO/ZnMgO heterostructures in a wide Mg composition range. (copyright 2007 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Précipitation d'altitude du nord-Chili, origine des sources de vapeur et données isotopiques

Directory of Open Access Journals (Sweden)

1998-01-01

Full Text Available Des échantillons de précipitations ont été recueillis sur les Altiplanos arides du nord-Chili et du sud-Bolivie entre juillet 1994 et mars 1997. Une station météorologique automatique a été installée à 4 300 m d’altitude (Quisquiro, 23,21°S et 67,25°O. Les événements pluvieux sont plus nombreux de décembre à mars pendant l’été austral. Les 126 analyses en isotopes stables (18O et 2H des événements pluvieux, mettent en évidence un large domaine de variations pour la période considérée (210 ‰ en  2H et 25 ‰ en  18O. La droite météorique locale calculée à Quisquiro s’écarte de la droite mondiale ( 2H = 8,2  18O + 16,6 ‰, r2=0,98. Les valeurs moyennes de l’excès en deutérium sont très différentes pour les événements sporadiques de l’hiver austral (d=9,7 ‰ et pour les précipitations de l’été (d=15,2 ‰. Outre la source de vapeur d’origine atlantique et afin d’expliquer la nature isotopique des précipitations de cette région, on peut envisager la contribution d’eau évaporée localement et/ou de vapeur originaire de l’océan Pacifique tropical. PRECIPITACIONES EN ALTITUD DEL NORTE DE CHILE, ORIGEN DE LAS FUENTES DE HUMEDAD Y DATOS ISOTÓPICOS. Se recolectaron muestras de precipitaciones en los Altiplanos áridos del norte de Chile y del sur de Bolivia entre julio de 1994 y marzo de 1997. Se montó una estación meteorológica automática a 4 360 m de altura (Quisquiro, 23,21°S et 67,25°O. Los análisis de isótopos estables (18O et 2H de los eventos lluviosos, que occuren principalmente durante el verano austral (esencialmente entre diciembre y marzo, ponen en evidencia un amplio campo de variaciones durante la época considerada (210 ‰ en  2H et 25 ‰ en  18O. La recta meteórica local calculada en Quisquiro ( 2H = 8,2  18O + 16,6 ‰, r2=0,98 se aparta de la recta mundial. El promedio del excedente de deuterio es muy diferente para los

Modalités d'occupation du territoire et relations humains-grands Carnivores durant le Pléistocène supérieur :Approche archéozoologique, taphonomique et paléoécologique du Bassin mosan dans son contexte nord-ouest européen

OpenAIRE

Jimenez, Elodie-Laure

2017-01-01

Au sein des territoires du nord-ouest européen, la Belgique et son Bassin mosan ont livré ces 150 dernières années une somme prodigieuse de témoins des populations humaines et animales paléolithiques. Alors que ces vestiges laissent supposer le caractère attractif de la région lors de la dernière glaciation du Pléistocène (115-10 ka BP), ces communautés d’ongulés et leurs prédateurs— humains et grands Carnivores — ont dû toutefois s’adapter à de nombreuses variations environne...

LES VARIANTES LEXICALES POUR LE MOT ESPADRILLES AU PARANÁ ET DANS LA RÉGION NORD-EST DU BRÉSIL: UNE ETUDE ETHNOLINGUISTIQUE

Directory of Open Access Journals (Sweden)

Maranúbia Pereira Barbosa Doiron

2014-03-01

Full Text Available : Cette étude concerne les variantes lexicales pour le mot espadrilles dans l’Etat du Paraná et dans la région Nord-Est du Brésil, sous un regard ethnolinguistique. Le corpus est composé par les donnés obtenues à partir de la question numéro 276 du Questionnaire Semantique-Lexical de l’Atlas Linguistique du Paraná (ALPR, dont l’auteur est le professeur Vanderci de Andrade Aguilera (1994, de l’Université de l’Etat de Londrina, autant que les variantes lexicales pour le mot espadrilles trouvées dans deux ouvrages littéraires d’auteurs originaires du Nord-Est du Brésil – Fogo Morto, de José Lins do Rego (2009 et Vidas Secas, de Graciliano Ramos (1969. Dans ces livres, les espadrilles jouent un rôle fondamental, tout en reflétant son importance dans le vestiaire de cette région, du moins jusqu’à moitié du XXème siècle. On rechercha des éventuelles ressemblances ou différences existentes entre les variantes lexicales de la chaussure mentionnée par les informateurs “paranaenses” et le modèle cité dans les ouvrages des écrivains Rego et Ramos. Dans les deuxs sources – la linguistique et la littéraire – on privilégia l’analyse semantique des unités lexicales et le contexte dans lequel elles ont été enregistrées. L’étude démontra que l’unité lexicale espadrilles et ses variantes phonétiques similaires dans les deux corpora, aussi que les variantes lexicales populaires présentes dans l’Atlas Linguistique du Paraná (ALPR. En dépit des simitudes l’esthétique et la fonction des espadrilles ne sont pas les mêmes dans les localitées concernées.

LES VARIANTES LEXICALES POUR LE MOT ESPADRILLES AU PARANÁ ET DANS LA RÉGION NORD-EST DU BRÉSIL: UNE ETUDE ETHNOLINGUISTIQUE

Directory of Open Access Journals (Sweden)

Vanderci de Andrade AGUILERA

2013-12-01

Full Text Available Cette étude concerne les variantes lexicales pour le mot espadrilles dans l’Etat du Paraná et dans la région Nord-Est du Brésil, sous un regard ethnolinguistique. Le corpus est composé par les donnés obtenues à partir de la question numéro 276 du Questionnaire Semantique-Lexical de l’Atlas Linguistique du Paraná (ALPR, dont l’auteur est le professeur Vanderci de Andrade Aguilera (1994, de l’Université de l’Etat de Londrina, autant que les variantes lexicales pour le mot espadrilles trouvées dans deux ouvrages littéraires d’auteurs originaires du Nord-Est du Brésil – Fogo Morto, de José Lins do Rego (2009 et Vidas Secas, de Graciliano Ramos (1969. Dans ces livres, les espadrilles jouent un rôle fondamental, tout en reflétant son importance dans le vestiaire de cette région, du moins jusqu’à moitié du XXème siècle. On rechercha des éventuelles ressemblances ou différences existentes entre les variantes lexicales de la chaussure mentionnée par les informateurs “paranaenses” et le modèle cité dans les ouvrages des écrivains Rego et Ramos. Dans les deuxs sources – la linguistique et la littéraire – on privilégia l’analyse semantique des unités lexicales et le contexte dans lequel elles ont été enregistrées. L’étude démontra que l’unité lexicale espadrilles et ses variantes phonétiques similaires dans les deux corpora, aussi que les variantes lexicales populaires présentes dans l’Atlas Linguistique du Paraná (ALPR. En dépit des simitudes l’esthétique et la fonction des espadrilles ne sont pas les mêmes dans les localitées concernées.

Long term monitoring of Gamma-Ray emission from the BL Lacertae object (1ES 2200+420)

Science.gov (United States)

Gunawardhana, Isuru; VERITAS Collaboration

2016-03-01

Blazars are a class of Active Galactic Nuclei (AGN) that have relativistic jets pointing along the observer line of sight. Blazars exhibit variable emission extending from radio to TeV energies. The variability timescale of the TeV flux is a key component of understanding the location of the very high energy emission zones. Deep observations of the quiescent state measurements are also required to disentangle the flaring state emission from quiescent state emission, a prerequisite for understanding the origin of blazar spectral variability. BL Lacertae (also known as 1ES 2200+420), as the namesake for all BL Lac objects, is a prime example of one such blazar. The VERITAS Observatory, an Imaging Atmospheric Cherenkov Telescope (IACT) array sensitive to gamma rays in the range from 85 GeV to 30 TeV, dedicates approximately 110 hours per year on deep observations of known gamma-ray blazars. In this talk, I will describe the TeV photon flux variability of BL Lacertae measured by VERITAS from 2013 to 2015.

Physical and chemical characterization of the (Th, U)O2 mixed oxide fuel

International Nuclear Information System (INIS)

Santos, A.M.M. dos; Avelar, M.M.; Palmieri, H.E.L.; Lameiras, F.S.; Ferreira, R.A.N.

1986-01-01

The NUCLEBRAS R and D Center (Centro de Desenvolvimento da Tecnologia Nuclear - CDTN) has been performing, together with german institutions (Kernforschungsanlage Julich GmbH - KFA, Krafwerk Union A.G. - KWU and NUKEM GmbH), a program for utilization of thorium in pressurized water reactors. In this paper are presented the physical and chemical characterizations necessary to quality the (Th, U)O 2 fuel and the respective methods. (Author) [pt

O conceito de região em três registros. Exemplificando com o Nordeste brasileiro Le concept de région dans trois registres. L’exemple du Nordeste brésilien The concept of region in three registries, exemples from the Brazilian Northeast

Directory of Open Access Journals (Sweden)

José William Vesentini

2012-03-01

Full Text Available Este ensaio é uma reflexão sobre regionalização que utiliza como exemplo o Nordeste do Brasil. Ele compara regionalização em geografia com periodização em história e mostra que em ambos os procedimentos existem elementos objetivos e subjetivos. Faz ainda um resumo crítico das três principais concepções sobre a região Nordeste: uma tradicional, centrada na análise das paisagens; outra moderna, preocupada com a divisão territorial do trabalho; e a terceira pós-moderna e que enfatiza a invenção dessa região – por determinados políticos, intelectuais e pela mídia – a partir dos anos 1920. No final há um balanço que mostra os prós e contras de cada uma dessas concepções regionais.Cet essai est une réflexion sur la régionalisation qui utilise comme un exemple le Nord-est du Brésil. Il compare la régionalisation en géographie avec la périodisation en histoire et démontre que dans les deux procédures il y a des éléments objectifs et subjectifs. En plus, il fait un résumé critique des trois conceptions principales sur la région du Nord-est: une conception traditionnel mettant l'accent sur l'analyse des paysages; une autre, moderne, préoccupé de la division territoriale du travail; et la troisième conception qui est post-moderne, mettant l'accent sur l'invention de cette région – par certains politiques, des intellectuels et la média – depuis les années 1920. A la fin de l’article, il y a un bilan qui affiche les pours et les contres de chacune de ces conceptions régionales.This essay is a reflection on regionalization which makes use of Northeast Brazil as an example. It compares the regionalization in geography with periodization in history showing that, in both procedures, there are subjective and objective elements. It also contains a critical summary of three main conceptions concerning the Northeast region: one of them is traditional and focus on the landscape; the other one is modern and its

Specialized meeting on 'Current topics of reactor safety research in Germany'; Fachtag 'Aktuelle Themen der Reaktorsicherheitsforschung in Deutschland'

Energy Technology Data Exchange (ETDEWEB)

Kruessenberg, Anne

2013-04-15

On October 11 and 12, 2012, the 2-day specialized meeting organized by the Thermodynamics and Fluid Dynamics Group together with the Dresden-Rossendorf Helmholtz Center and TUeV NORD SysTec GmbH and Co.KG was held at the Dresden-Rossendorf Helmholtz Center within the series of events on 'Current Topics of Safety Research in Germany.' The program of lectures was supplemented by poster presentations and exhibitions by the members of the joint research groups and companies working in the fields. The meeting again was very well attended by over 100 persons. (orig.)

Topotactic phase transformation of the brownmillerite SrCoO2.5 to the perovskite SrCoO3- δ.

Science.gov (United States)

Jeen, H; Choi, W S; Freeland, J W; Ohta, H; Jung, C U; Lee, H N

2013-07-19

Pulsed laser epitaxy of brownmillerite SrCoO2.5 thin films and their phase transformation to the perovskite SrCoO3-δ are investigated. While the direct growth of the fully oxidized perovskite films is found to be an arduous task, filling some of oxygen vacancies into SrCoO2.5 by topotactic oxidation accompanies systematic evolution of electronic, magnetic, and thermoelectric properties, useful for many information and energy technologies. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Facile Synthesis of Free-Standing NiO/MnO2 Core-Shell Nanoflakes on Carbon Cloth for Flexible Supercapacitors.

Science.gov (United States)

Xi, Shuang; Zhu, Yinlong; Yang, Yutu; Jiang, Shulan; Tang, Zirong

2017-12-01

Free-standing NiO/MnO 2 core-shell nanoflake structure was deposited on flexible carbon cloth (CC) used as electrode for high-performance supercapacitor (SC). The NiO core was grown directly on CC by hydrothermal process and the following annealing treatment. MnO 2 thin film was then covered on NiO structures via a self-limiting process in aqueous solution of 0.5 M KMnO 4 and 0.5 M Na 2 SO 4 with a carbon layer serving as the sacrificial layer. Both the core and shell materials are good pseudocapacitive materials, the compounds of binary metal oxides can provide the synergistic effect of all individual constituents, and thus enhance the performance of SC electrode. The obtained CC/NiO/MnO 2 heterostructure was directly used as SC electrodes, showing an enhanced electrochemical performance including areal capacitance of 316.37 mF/cm 2 and special gravimetric capacitance of 204.3 F/g at the scan rate of 50 mV/s. The electrode also shows excellent cycling stability, which retains 89% of its initial discharge capacitance after 2200 cycles with >97% Coulombic efficiency. The synthesized binder-free hierarchical composite electrode with superior electrochemical properties demonstrates enormous potential in the application of flexible SCs.

Focus - Les établissements publics fonciers, des outils pour la biodiversité des zones humides : le cas de l’EPF Nord-Pas de Calais

Directory of Open Access Journals (Sweden)

LEMOINE, Guillaume

2017-09-01

Full Text Available Les établissements publics fonciers (EPF ont pour mission recycler le foncier dégradé pour favoriser, dans le cadre du développement durable, le renouvellement urbain, notamment pour aider la construction de logements tout en luttant contre l’étalement urbain. Devenus propriétaires de nombreux terrains, dont des zones humides, ils sont également concernés par la protection et la valorisation de ces espaces naturels. À travers l'exemple des actions menées par l’EPF Nord-Pas de Calais pour préserver ces zones humides, ce focus s'intéresse au rôle que peuvent jouer les EPF dans la préservation des espaces agricoles et naturels.

Conditioning of intermediate-level waste at Forschungszentrum Juelich GmbH

International Nuclear Information System (INIS)

Krumbach, H.

2003-01-01

This contribution to the group of low-level, intermediate, mixed and hazardous waste describes the conditioning of intermediate-level mixed waste (dose rate above 10 mSv/h at the surface) from Research Centre Juelich (FZJ). Conditioning of the waste by supercompaction is performed at Research Centre Karlsruhe (FZK). The waste described is radioactive waste arising from research at Juelich. This waste includes specimens and objects from irradiation experiments in the research reactors Merlin (FRJ-1) and Dido (FRJ-2) at FZJ. In principle, radioactive waste at Forschungszentrum Juelich GmbH is differentiated by the surface dose rate at the waste package. Up to a surface dose rate of 10 mSv/h, the waste is regarded as low-level. The radioactive waste described here has a surface dose rate above 10 mSv/h. Waste up to 10 mSv/h is conditioned at the Juelich site according to different conditioning methods. The intermediate-level waste can only be conditioned by supercompaction in the processing facility for intermediate-level waste from plant operation at Research Centre Karlsruhe. Research Centre Juelich also uses this waste cell to condition its intermediate-level waste from plant operation. (orig.)

Sensitivity of cesium chemistry to the O/U radio in UO2+x

International Nuclear Information System (INIS)

McFarlane, J.; LeBlanc, J.C.; Owen, D.G.

1995-01-01

The effect of O/U ratio on chemical reactivity was investigated in a cesium-iodide/uranium/tungsten system at temperatures up to 2200 K. It was found that slight changes in the oxidation of the urania had a large effect on reactivity. Crushed fresh fuel samples showed little reaction with CsI; however, slightly hyperstoichiometric fuel showed considerable reaction. The tungsten participated in the reaction by removing excess oxygen from the urania, eventually leading to a cesium tungstate species that was analyzed by Fourier Transform Infrared (FTIR) and X-ray diffraction (XRD) techniques. (author)

The regulating power market on the Nordic power exchange Nord Pool. An econometric analysis

International Nuclear Information System (INIS)

Skytte, K.

1999-08-01

What differentiates the structure of Nord Pool from other power exchanges around the world is the way the balance from the spot market is maintained until the actual, physical delivery takes place, via the regulating power market in Norway. This paper reveals the pattern of the prices on the regulating power market, by analysing the cost of being unable to fulfil the commitments made on the spot market. Some power producers with unpredictable fluctuations (e.g. wind) will need to buy regulation services. The disclosed pattern implies that these producers must pay a limited premium of readiness in addition to the spot price; this premium is independent of the amount of regulation. The level of the premium of readiness for down-regulation is shown to be strongly influenced by the level of the spot price. On the other hand, it is demonstrated that the premium for up-regulation is less correlated to the spot price. Furthermore, it is found that the amount of regulation affects the price of regulating power for up-regulation more strongly than it does for down-regulation. The disclosed cost of using the regulating power market is a quadratic function of the amount of regulation. This asymmetric cost may encourage bidders with fluctuating production to be more strategic in their way of bidding on the spot market. By using such strategies the extra costs (for example wind power) needed to counter unpredictable fluctuations may be limited. 12 refs

Inventory of chemical releases of nuclear installations in the North-Cotentin; Inventaire des rejets chimiques des installations nucleaires du Nord-Cotentin

Energy Technology Data Exchange (ETDEWEB)

NONE

2002-05-15

The nuclear installations concerned by this study are Cogema La Hague, the Flamanville nuclear power plant, the Manche plant and the National Navy of Cherbourg.The objective followed by the ' source term ' work group has consisted in counting and examining the whole of existing measures relative to the releases of chemical substances in the liquid and gaseous effluents. Then because of the lack of measures for the operation first years of installations, the work group has estimated the order of magnitude of these chemical releases (essentially for Cogema La Hague). This report presents a review of the literature looking at the background levels of chemicals in different environmental compartments: air, soil, plants and animals products. these values have been summarized here to be available for comparisons with concentrations input by the North Cotentin nuclear installations, calculated by the G.R.N.C. (radioecology group of Nord Cotentin)

Thermal Annealing Reduces Geminate Recombination in TQ1:N2200 All-Polymer Solar Cells

KAUST Repository

Karuthedath, Safakath

2018-03-27

A combination of steady-state and time-resolved spectroscopic measurements is used to investigate the photophysics of the all-polymer bulk heterojunction system TQ1:N2200. Upon thermal annealing a doubling of the external quantum efficiency and an improved fill factor (FF) is observed, resulting in an increase in the power conversion efficiency. Carrier extraction is similar for both blends, as demonstrated by time-resolved electric-field-induced second harmonic generation experiments in conjunction with transient photocurrent studies, spanning the ps-µs time range. Complementary transient absorption spectroscopy measurements reveal that the different quantum efficiencies originate from differences in charge carrier separation and recombination at the polymer-polymer interface: in as-spun samples ~35 % of the charges are bound in interfacial charge-transfer states and recombine geminately, while this pool is reduced to ~7 % in thermally-annealed sample, resulting in higher short-circuit currents. Time-delayed collection field experiments demonstrate a field-dependent charge generation process in as-spun samples, which reduces the FF. In contrast, field-dependence of charge generation is weak in annealed films. While both devices exhibit significant non-geminate recombination competing with charge extraction, causing low FFs, our results demonstrate that the donor/acceptor interface in all-polymer solar cells can be favourably altered to enhance charge separation, without compromising charge transport and extraction.

75 FR 75868 - Airworthiness Directives; Diamond Aircraft Industries GmbH Models DA 40 and DA 40F Airplanes

Science.gov (United States)

2010-12-07

... Airworthiness Directives; Diamond Aircraft Industries GmbH Models DA 40 and DA 40F Airplanes AGENCY: Federal... of the Thielert Engine Owners Group commented that the Model DA 42 has the same door design and the same unsafe condition. He recommended that the AD also apply to the Model DA 42. The FAA has discussed...

ZnMgO-ZnO quantum wells embedded in ZnO nanopillars: Towards realisation of nano-LEDs

Energy Technology Data Exchange (ETDEWEB)

Bakin, A.; El-Shaer, A.; Mofor, A.C.; Al-Suleiman, M.; Schlenker, E.; Waag, A. [Institute of Semiconductor Technology, Braunschweig Technical University, Hans-Sommer-Str. 66, 38106 Braunschweig (Germany)

2007-07-01

ZnO thin films, ZnMgO/ZnO heterostructures and ZnO nanostructures were fabricated using molecular beam epitaxy (MBE), vapour phase transport (VPT) and an aqueous chemical growth approach (ACG). The possibility to employ several fabrication techniques is of special importance for the realization of unique device structures. MBE was implemented for ZnO-based layer and heterostructure growth. Pronounced RHEED oscillations were used for growth control and optimisation, resulting in high quality ZnO and Zn{sub 1-x}Mg{sub x}O epilayers and heterostructures, as well as ZnMgO/ZnO quantum wells on sapphire and SiC substrates. A novel advanced VPT approach is developed and sapphire, SiC, ZnO epitaxial layers, and even plastic and glass were implemented as substrates for ZnO growth. The VPT fabrication of ZnO nanopillars, leading to well aligned, c-axis oriented nanopillars with excellent quality and purity is demonstrated. Successful steps were made towards device fabrication on ZnO basis. The nanopillar fabrication technique is combined with MBE technology: MBE-grown ZnMgO/ZnO quantum well structures were grown on ZnO nanopillars presenting significant progress towards nano-LEDs realization. (copyright 2007 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Metal-organic framework templated synthesis of Fe{sub 2}O{sub 3}/TiO{sub 2} nanocomposite for hydrogen production

Energy Technology Data Exchange (ETDEWEB)

Krafft, Kathryn E. de; Wang, Cheng; Lin, Wenbin [University of North Carolina, Chapel Hill, NC (United States). Department of Chemistry

2012-04-17

A new metal-organic framework (MOF)-templated method has been developed for the synthesis of a metal oxide nanocomposite with interesting photophysical properties. Fe-containing nanoscale MOFs are coated with amorphous titania, then calcined to produce crystalline Fe{sub 2}O{sub 3}/TiO{sub 2} composite nanoparticles. This material enables photocatalytic hydrogen production from water using visible light, which cannot be achieved by either Fe{sub 2}O{sub 3} or TiO{sub 2} alone or a mixture of the two. (Copyright copyright 2012 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Estimation of the risk of radiation-induced leukaemia among young people in the vicinity of the La Hague reprocessing plant. Results from the nord-cotentin radioecological study

International Nuclear Information System (INIS)

Rommens, C.; Laurier, D.; Merle-Szeremeta, A.; Sugier, A.; Drombry-Ringeard, C.

2000-01-01

A radioecological study has been performed around the La-Hague nuclear reprocessing plant (Nord-Cotentin, France). The Working Group included nuclear operators, authorities, international experts and members of environmental organisations and was supported by IPSN. The study aimed to reconstruct radiation doses received by members of the public aged 0 to 24 years and living in the area, with a view to estimate the associated risk of leukaemia between 1978 and 1996. The assessment involved three steps: 1. reconstruction of a cohort of people aged 0 to 24 years, using local birth rates for the years 1954 to 1996 and taking into account the additional migrations of young people in the area. 2. estimation of doses to the red bone marrow received from all source of radiation (natural, medical, local nuclear industries and Chernobyl and weapons testing). Concentrations of radionuclides in the environment were estimated with a combination of two approaches: the modelling of the transfer of the releases in the environment and the use of environmental measurements. The dose computation takes into account the life style of the local population. ICRP dose coefficients to the red bone marrow were used. 3. derivation of leukaemia risk from a dose response model recommended by the UNSCEAR committee. The reconstructed population includes 6656 people born between 1954 and 1996, who inhabited the study area for at least one year between 1978 and 1996 before the age of 25. The number of person-years between 1978 and 1996 is 69308. The total collective dose to the red bone marrow due to local nuclear installations is 0.5 man.Sv. For the sake of comparison, the collective dose due to all sources of exposure is 241 man.Sv: The estimated number of leukaemia due to all exposure sources is 0.835. 74% are due to natural exposures, 24% to medical ones and 2% to the Chemobyl accident and nuclear arm testing. Nuclear facilities of Nord-Cotentin contribute only for 0.1% (between 0.0009 and 0

Post glacial mass movements in Western Norway with special emphasis on the 2000 - 2200 BP and 2800 - 3200 BP periods - final report

International Nuclear Information System (INIS)

Boee, Reidulv; Lepland, Aivo; Blikra, Lars Harald; Longva, Oddvar; Soenstegaard, Eivind

2002-01-01

The Ormen Lange Gas Field was discovered in the Norwegian Sea outside the Moere og Romsdal in 1997. The development of this field which is located in the area of the Storegga Slide, requires safety assessment. The project aims to collect and compile data on slides, avalanches and gravitational faults that may have resulted from large earthquakes or tsunamis in the north west of Western Norway. A major task in the present project has been to investigate the spatial extent and interpret the origin of a postulated mass movement event ca. 2000 years ago and to evaluate its causes, climate variations, a tsunami (possibly caused by an earthquake affecting the offshore area), and earthquake only affecting parts of Western Norway or a combination of an earthquake and a tsunami. Several other mass movements, including the Storegga Slide tsunami deposits and pre-Storegga Slide slide and debris flow deposits have been studied both in the fjord and the lake sediments. Five of the 16 investigated fjords (Dalsfjorden, Foerdefjorden, Syvdsfjorden, Voldafjorden, Oerstadfjorden) provide evidence for a 2000 - 2200 years BP (calendar years before present, i.e. 1950) event. Previous investigations show no indication of a large shelf edge slide in the Storegga area, that may have created a tsunami at that time, nor are any mass movement deposits found on land or in the investigated lakes. This suggests that the 2000 - 2200 BP debris flows and turbidites were most likely related to one or more earthquakes on land or close to the coast and not an offshore mega slide generated tsunami. The Storegga Slide (8200 BP) tsunami deposits are observed in cores over most of the investigated area, both in the deep fjords and in lakes. Striking similarity between major slide and debris flow deposits at the 2000 - 2200 BP and ca. 11000 - 11700 BP stratigraphic levels suggest a common triggering mechanism, probably earthquakes with epicentres in the Sunnfjord Sunnmoere region. A period of debris flows

Measurement of oxygen chemical diffusion in PuO2-x and analysis of oxygen diffusion in PuO2-x and (Pu,U)O2-x

International Nuclear Information System (INIS)

Kato, Masato; Uchida, Teppei; Sunaoshi, Takeo

2013-01-01

Oxygen chemical diffusion in PuO 2-x was investigated in the temperature range of 1473-1873 K by thermogravimetry as functions of oxygen-to-metal (O/M) ratios and temperatures. The oxygen chemical diffusion coefficients, D were determined assuming that the reduction curves were dominated by a diffusion process. The O/M ratio and Pu content dependence on the chemical diffusion coefficients were evaluated. The chemical diffusion coefficient had its minimum value at around O/M=1.98 and decreased with increasing Pu content in (U,Pu)O 2-x . The self-diffusion coefficients were evaluated. A model for describing the relationship among O/M ratio, oxygen chemical diffusion, and self-diffusion was proposed based on defect chemistry. (copyright 2012 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Tests of three tapered airfoils based on the N.A.C.A. 2200, the N.A.C.A.-M6, and the Clark Y sections

Science.gov (United States)

Anderson, Raymond F

1934-01-01

Three tapered airfoils based on the N.A.C.A. 2200, the N.A.C.A.-M6, and the Clark Y sections were tested in the variable-density wind tunnel at a Reynolds Number of approximately 3,100,000. The models, which were of aspect ratio 6, had constant core center sections and rounded tips, and tapered in thickness from 18 percent at the roots to 9 percent at the tips. The aerodynamic characteristics are given by the usual dimensionless coefficients plotted for both positive and negative angles of attack and by effective profile-drag coefficients plotted against lift coefficients.

Catalytic Methane Decomposition over Fe-Al2O3

KAUST Repository

Zhou, Lu

2016-05-09

The presence of a Fe-FeAl2O4 structure over an Fe-Al2O3 catalysts is demonstrated to be vital for the catalytic methane decomposition (CMD) activity. After H2 reduction at 750°C, Fe-Al2O3 prepared by means of a fusion method, containing 86.5wt% FeAl2O4 and 13.5wt% Fe0, showed a stable CMD activity at 750°C for as long as 10h. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Balancing competing water needs in Morocco's Saiss basin | CRDI ...

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

Maroc : La valeur de l'eau. Le Maroc, au nord de l'Afrique, est un territoire en partie aride, où les pluies sont rares, mais où l'agriculture prospère malgré tout. Voir davantageMaroc : La valeur de l'eau ...

Adaptive Options for GrowinPour une meilleure adaptation de la ...

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

Maroc : La valeur de l'eau. Le Maroc, au nord de l'Afrique, est un territoire en partie aride, où les pluies sont rares, mais où l'agriculture prospère malgré tout. Voir davantageMaroc : La valeur de l'eau ...

Cathodoluminescence of single ZnO nanorod heterostructures

Energy Technology Data Exchange (ETDEWEB)

Piechal, Bernard; Donatini, Fabrice; Dang, Le Si [CNRS-CEA-UJF joint group ' ' Nanophysique et Semiconducteurs' ' , Universite Joseph Fourier (CNRS UMR 5588), Saint Martin d' Heres (France); Yoo, Jinkyoung; Yi, Gyu-Chul [National CRI Center for Semiconductor Nanorods and Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang (Korea); Elshaer, Abdelhamid; Mofor, A.C.; Bakin, Andrey; Waag, Andreas [Institute of Semiconductor Technology (IHT), TU Braunschweig (Germany)

2007-05-15

Optical properties of ZnO-based single nanorods are probed by cathodoluminescence (CL) measurements at T = 5 K. We observe a variation of the ZnO near band edge CL by three orders of magnitude along the nanorod axis, accompanied by a spectral blueshift of 10-30 meV. This indicates a rather poor structural quality of the nanorod bottom part, close to the substrate. ZnO/ZnMgO quantum wells grown on top of ZnO nanorods are found to exhibit much stronger confinement effects as compared to their two-dimensional counterparts, suggesting a reduced spontaneous and piezoelectric polarization effects. (copyright 2007 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Extended O-Doped Polycyclic Aromatic Hydrocarbons.

Science.gov (United States)

Stassen, Daphné; Demitri, Nicola; Bonifazi, Davide

2016-05-10

The synthesis of O-doped benzorylenes, in which peripheral carbon atoms have been replaced by oxygen atoms, has been achieved for the first time. This includes key high-yielding ring-closure steps which, through intramolecular C-O bond formation, allow stepwise planarization of oligonaphthalenes. Single-crystal X-ray diffraction showed that the tetraoxa derivative forms remarkable face-to-face π-π stacks in the solid state, a favorable solid-state arrangement for organic electronics. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Water volume available for ECCS sump recirculation mode following a LOCA

International Nuclear Information System (INIS)

Riekert, T.; Rebohm, H.; Huber, J.; Brandes, F.

2006-01-01

In this paper we describe the reviews performed in Germany on the water level in the containment sump after a LOCA and the derived actions. Our view on the issue is from the perspective of the independent safety experts - i.e. TUV SUD Industrie Service (TUV SUD IS), TUV SUD Energietechnik GmbH Baden-Wuerttemberg (TUV SUD ET), TUV NORD EnSys Hannover and TUV NORD SysTec -, which reviewed the analyses of the utilities on behalf of the responsible supervising authorities. Between these expert organizations information were exchanged via the steering committee on nuclear technology of the association of the TUVs (VdTUV). In our paper we describe the analyses on the two safety issues relevant in the connection with the water level in the containment sump: the necessary minimum coverage of suction pipes to avoid inadmissible entrainment of air and the water retention inside the containment after a LOCA. Our description concentrates on PWRs because of the more complex conditions in comparison to BWRs. In conclusion it can be stated that due to the thorough evaluation of operating experience, optimization measures could be derived. In addition, the analyses served the purpose of know-how maintenance. (authors)

Water volume available for ECCS sump recirculation mode following a LOCA

Energy Technology Data Exchange (ETDEWEB)

Riekert, T. [TUV NORD SysTec (Germany); Rebohm, H. [TUV NORD EnSys Hannover (Germany); Huber, J. [TUV SUD IS (Germany); Brandes, F. [TUV SUD ET (Germany)

2006-07-01

In this paper we describe the reviews performed in Germany on the water level in the containment sump after a LOCA and the derived actions. Our view on the issue is from the perspective of the independent safety experts - i.e. TUV SUD Industrie Service (TUV SUD IS), TUV SUD Energietechnik GmbH Baden-Wuerttemberg (TUV SUD ET), TUV NORD EnSys Hannover and TUV NORD SysTec -, which reviewed the analyses of the utilities on behalf of the responsible supervising authorities. Between these expert organizations information were exchanged via the steering committee on nuclear technology of the association of the TUVs (VdTUV). In our paper we describe the analyses on the two safety issues relevant in the connection with the water level in the containment sump: the necessary minimum coverage of suction pipes to avoid inadmissible entrainment of air and the water retention inside the containment after a LOCA. Our description concentrates on PWRs because of the more complex conditions in comparison to BWRs. In conclusion it can be stated that due to the thorough evaluation of operating experience, optimization measures could be derived. In addition, the analyses served the purpose of know-how maintenance. (authors)

As faces e funções da tradução em sala de aula de LE.DOI: 10.5007/2175-7968.2011v1n27p161

Directory of Open Access Journals (Sweden)

Sinara de Oliveira Branco

2011-11-01

Full Text Available Este artigo tem o objetivo de discutir e demonstrar como a tradução pode ser aplicada em sala de aula de línguas estrangeiras (LE de forma eficaz, sem interferir negativamente na aquisição da língua estrangeira e utilizando, em casos específicos, a língua materna (LM ou a própria LE como recurso tradutório. Para tanto, a Abordagem Funcionalista da Tradução de Nord (1997 será utilizada como base teórica, bem como as categorias de tradução de Jakobson (2000. A partir da discussão da teoria, serão apresentados exercícios de tradução que descrevam o uso e eficácia tradutórios no contexto de aprendizagem de LE. Os resultados demonstram que há uma desmistificação quanto ao uso da tradução nesse contexto e que a LM passa a ter sua importância e valor novamente reconhecidos no aprendizado de LE.

Phase stability of iron germanate, FeGeO3, to 127 GPa

Science.gov (United States)

Dutta, R.; Tracy, S. J.; Stan, C. V.; Prakapenka, V. B.; Cava, R. J.; Duffy, T. S.

2018-04-01

The high-pressure behavior of germanates is of interest as these compounds serve as analogs for silicates of the deep Earth. Current theoretical and experimental studies of iron germanate, FeGeO3, are limited. Here, we have examined the behavior of FeGeO3 to 127 GPa using the laser-heated diamond anvil cell combined with in situ synchrotron X-ray diffraction. Upon compression at room temperature, the ambient-pressure clinopyroxene phase transforms to a disordered triclinic phase [FeGeO3 (II)] at 18 GPa in agreement with earlier studies. An additional phase transition to FeGeO3 (III) occurs above 54 GPa at room temperature. Laser-heating experiments ( 1200-2200 K) were conducted at three pressures (33, 54, and 123 GPa) chosen to cover the stability regions of different GeO2 polymorphs. In all cases, we observe that FeGeO3 dissociates into GeO2 + FeO at high pressure and temperature conditions. Neither the perovskite nor the post-perovskite phase was observed up to 127 GPa at ambient or high temperatures. The results are consistent with the behavior of FeSiO3, which also dissociates into a mixture of the oxides (FeO + SiO2) at least up to 149 GPa.

A Determination of the 2200 m/s Absorption Cross Section and Resonance Integral of Arsenic by Pile Oscillator Technique

Energy Technology Data Exchange (ETDEWEB)

Sokolowski, E K; Bladh, R

1969-02-15

Pile oscillator measurements of heavy-water solutions of As, B, Mn and In have been carried out in two different neutron spectra in the R0 reactor. For B, Mn and In the 2200 m/s cross section values recommended in BNL-325 are given to within 1.5 % or less, while for As the stated uncertainty is 5 %. In the present work the BNL values for B, Mn and In were used to derive weighted mean calibration constants for the reactor, which were then in turn used for obtaining self-consistent cross section values for all four elements. The values thus obtained for B, Mn and In were within experimental error of the recommended BNL values. The absorption cross section for As is in good agreement with a recently published value for the activation cross section. The value for the resonance integral of As, derived from the present measurements, is in better agreement with calculations from resonance parameters than values reported earlier.

A Determination of the 2200 m/s Absorption Cross Section and Resonance Integral of Arsenic by Pile Oscillator Technique

International Nuclear Information System (INIS)

Sokolowski, E.K.; Bladh, R.

1969-02-01

Pile oscillator measurements of heavy-water solutions of As, B, Mn and In have been carried out in two different neutron spectra in the R0 reactor. For B, Mn and In the 2200 m/s cross section values recommended in BNL-325 are given to within 1.5 % or less, while for As the stated uncertainty is 5 %. In the present work the BNL values for B, Mn and In were used to derive weighted mean calibration constants for the reactor, which were then in turn used for obtaining self-consistent cross section values for all four elements. The values thus obtained for B, Mn and In were within experimental error of the recommended BNL values. The absorption cross section for As is in good agreement with a recently published value for the activation cross section. The value for the resonance integral of As, derived from the present measurements, is in better agreement with calculations from resonance parameters than values reported earlier

The Only Way Is Up? Match Outcome And Stock Price Reactions Of Borussia Dortmund GmbH & Co. KGaA

DEFF Research Database (Denmark)

Stadtmann, Georg; Ruelke, Jan Christoph

2008-01-01

We use stock market data for Borussia Dortmund GmbH & Co. KGaA - one of the leading German football clubs - for an application of the news model. Due to the specific characteristics of the news generating process, the case of a publicly traded sport club is a very appropriate candidate for testing...

Electrooxidative Ruthenium-Catalyzed C-H/O-H Annulation by Weak O-Coordination.

Science.gov (United States)

Qiu, Youai; Tian, Cong; Massignan, Leonardo; Rogge, Torben; Ackermann, Lutz

2018-05-14

Electrocatalysis has been identified as a powerful strategy for organometallic catalysis, and yet electrocatalytic C-H activation is restricted to strongly N-coordinating directing groups. The first example of electrocatalytic C-H activation by weak O-coordination is presented, in which a versatile ruthenium(II) carboxylate catalyst enables electrooxidative C-H/O-H functionalization for alkyne annulations in the absence of metal oxidants; thereby exploiting sustainable electricity as the sole oxidant. Mechanistic insights provide strong support for a facile organometallic C-H ruthenation and an effective electrochemical reoxidation of the key ruthenium(0) intermediate. © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

Logistics worldwide for the whole nuclear cycle. Nuclear Cargo + Service GmbH

International Nuclear Information System (INIS)

Geiger, Horst; Schymke, Klaus

2011-01-01

Nuclear Cargo + Service GmbH (NCS) offers logistics worldwide for the whole nuclear cycle to fuel manufacturers, reactor operators, and waste management companies. Transport equipment and interim stores are part of the company's facilities. The firm's Front End unit conducts transnational transports of yellow cake, uranium hexafluoride, and enriched uranium and uranium from reprocessing. In the Back End unit, the company performs worldwide transports of spent fuel elements of research reactors. Another key area of activity is shipment of radioactive waste ranging from low-level waste to HAW (highly active waste generating heat). In its Component Disposal area, NCS offers a variety of transport services up to and including large components, e.g. reactor pressure vessels, both on the road and by rail and ship. NCS operates storage halls of its own for storing radioactive materials including radioactive waste. The technical equipment of NCS comprises a large pool of road and rail transport vehicles as well as a great number of vessels for radioactive materials. (orig.)

Synthesis of metallic ReO3 nanowires

International Nuclear Information System (INIS)

Myung, Dongshin; Lee, Yumin; Lee, Jaeyeon; Kim, Myung Hwa; Yu, Hak Ki; Lee, Jong-Lam; Baik, Jeong Min; Kim, Woong

2010-01-01

We present the synthesis of highly crystalline metallic rhenium trioxide (ReO 3 ) nanowires via a simple physical vapor transport at 300 C for the first time. Based on HRTEM, the ReO 3 nanowires exhibit a core of perfect cubic perovskite-type single crystal structure with a shell of thin amorphous and disordered structures of less than 2 nm in the near surface layers. Possibly this is due to proton intercalation induced by the surface reaction of single crystal ReO 3 with water. (copyright 2010 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

The role of the visitors' centre during the decommissioning of the Greifswald nuclear power plant and the impact on the public

International Nuclear Information System (INIS)

Brauer, D.

1993-01-01

In the Energiewerke Nord (EWN) GmbH, the former Nuclear Power Plant (NPP) Greifswald have been the units 1 to 5 shut down finally. The units 6 to 8 are in different stages of construction, but it will not be continued. The current situation, tasks and perspectives at the Greifswald NPP site are briefly described. The main tasks are the post-operation, the decommissioning and the establishment of an industrial area. Considering the situation at the Greifswald site the particularities and necessities and the influence of the Visitors' centre on the neighbouring villages, communities, population and the impact on the public are discussed. (author)

75 FR 7996 - Airworthiness Directives; Thielert Aircraft Engines GmbH (TAE) Models TAE 125-01 and TAE 125-02...

Science.gov (United States)

2010-02-23

... Engines GmbH (TAE) Models TAE 125-01 and TAE 125-02-99 Reciprocating Engines Installed in, But Not Limited...-99 engines, initial and repetitive replacements of the PPRV, and installation of a vibration isolator..., we estimate that this proposed AD would affect about 300 TAE 125-01 and TAE 125-02-99 reciprocating...

Organic-inorganic Au/PVP/ZnO/Si/Al semiconductor heterojunction characteristics

Science.gov (United States)

Mokhtari, H.; Benhaliliba, M.

2017-11-01

The paper reports the fabrication and characterization of a novel Au/PVP/ZnO/Si/Al semiconductor heterojunction (HJ) diode. Both inorganic n type ZnO and organic polyvinyl pyrrolidone (PVP) layers have grown by sol-gel spin-coating route at 2000 rpm. The front and back metallic contacts are thermally evaporated in a vacuum at pressure of 10-6 Torr having a diameter of 1.5 mm and a thickness of 250 nm. The detailed analysis of the forward and reverse bias current-voltage characteristics has been provided. Consequently, many electronic parameters, such as ideality factor, rectification coefficient, carrier concentration, series resistance, are then extracted. Based upon our results a non-ideal diode behavior is revealed and ideality factor exceeds the unity (n > 4). A high rectifying (~4.6 × 10 4) device is demonstrated. According to Cheung-Cheung and Norde calculation models, the barrier height and series resitance are respectively of 0.57 eV and 30 kΩ. Ohmic and space charge limited current (SCLC) conduction mechanisms are demonstrated. Such devices will find applications as solar cell, photodiode and photoconductor.

Measurement of oxygen chemical diffusion in PuO{sub 2-x} and analysis of oxygen diffusion in PuO{sub 2-x} and (Pu,U)O{sub 2-x}

Energy Technology Data Exchange (ETDEWEB)

Kato, Masato; Uchida, Teppei [Advanced Nuclear System Research and Development Directorate, Japan Atomic Energy Agency, 4-33 Muramatsu, Tokai-mura, Ibaraki 319-1194 (Japan); Sunaoshi, Takeo [Inspection Development Company Ltd., 4-33 Muramatsu, Tokai-mura, Ibaraki 319-1194 (Japan)

2013-02-15

Oxygen chemical diffusion in PuO{sub 2-x} was investigated in the temperature range of 1473-1873 K by thermogravimetry as functions of oxygen-to-metal (O/M) ratios and temperatures. The oxygen chemical diffusion coefficients, D were determined assuming that the reduction curves were dominated by a diffusion process. The O/M ratio and Pu content dependence on the chemical diffusion coefficients were evaluated. The chemical diffusion coefficient had its minimum value at around O/M=1.98 and decreased with increasing Pu content in (U,Pu)O{sub 2-x}. The self-diffusion coefficients were evaluated. A model for describing the relationship among O/M ratio, oxygen chemical diffusion, and self-diffusion was proposed based on defect chemistry. (copyright 2012 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Monovalent and with activation of components. Administration building for a winery; Monovalent und mit Bauteilaktivierung. Verwaltungsgebaeude fuer eine Weinkellerei

Energy Technology Data Exchange (ETDEWEB)

Freytag, Michaela [Uponor GmbH, Hassfurt (Germany)

2011-07-01

The climate is the key aspect: That what is recommended crucial for a good wine, also is recommended for the employees of the winery Zimmermann-Graeff and Mueller GmbH and Co. KG (Zell/Mosel, Federal Republic of Germany): Creation of an all-season comfort climate in order to achieve best results in quality and work. This in particular is valid for the management of this company on an area of 2,200 square meters. The owner laid great emphasis on quality and contemporarily solutions.

Tradução de libras para português de textos acadêmicos: considerações sobre a prática

Directory of Open Access Journals (Sweden)

Natália Schleder Rigo

2015-10-01

Full Text Available http://dx.doi.org/10.5007/2175-7968.2015v35nesp2p458 Este artigo objetiva apresentar ao leitor algumas considerações acerca do trabalho de tradução de textos acadêmicos produzidos em Língua Brasileira de Sinais (Libras para o Português em sua modalidade escrita. O trabalho possui como recorte a tradução de uma tese de doutorado produzida em Libras e registrada em vídeo por uma acadêmica surda da Universidade Federal de Santa Catarina, UFSC. As considerações são aqui apresentadas seguindo os fatores extratextuais e intratextuais de Nord (1991 propostos como aspectos de análise textual para projetos de tradução. Neste artigo, busca-se avançar nas discussões sobre as práticas desempenhadas pelos tradutores de língua de sinais no Brasil, em especial, sobre traduções de textos envolvendo a direção Libras - Português que, embora ainda carente de pesquisas e registros, trata-se de uma atividade que já vem sendo realizada por profissionais em instituições de ensino superior.

76 FR 64285 - Airworthiness Directives; Thielert Aircraft Engines GmbH (TAE) Models TAE 125-02-99 and TAE 125...

Science.gov (United States)

2011-10-18

... Engines GmbH (TAE) Models TAE 125-02-99 and TAE 125-01 Reciprocating Engines AGENCY: Federal Aviation... substance. But we have found it necessary to reduce the initial compliance time for TAE 125-02-99 engines... about 370 TAE 125-01 and TAE 125-02-99 reciprocating engines installed on products of U.S. registry. We...

77 FR 57041 - Airworthiness Directives; Thielert Aircraft Engines GmbH Models TAE 125-01, TAE 125-02-99, and...

Science.gov (United States)

2012-09-17

... Engines GmbH Models TAE 125-01, TAE 125-02-99, and TAE 125-02-114 Reciprocating Engines AGENCY: Federal... Models TAE 125-01, TAE 125-02-99, and TAE 125-02-114 Reciprocating Engines. The existing AD currently... TAE 125-01, TAE 125-02-99, and TAE 125-02-114 reciprocating engines installed in, but not limited to...

Etude de la qualité bactériologique de l’eau utilisée dans l’industrie agroalimentaire dans le Nord du Maroc

Science.gov (United States)

Haijoubi, El Houcine; Benyahya, Fatiha; Bendahou, Abdrezzak; Essadqui, Faima Zahra; Behhari, Mohammed El; El Mamoune, Ahmed Fouad; Ghailani, Naima Nourouti; Mechita, Mohcine Bennani; Barakat, Amina

2017-01-01

Introduction L'eau est utilisée d'une façon primordiale dans tout le processus de la fabrication des produits alimentaires. Les industries agroalimentaires du Nord du Maroc utilisent différentes sources d'eaux mais l'eau de réseau public et l'eau de puits sont les principales sources d'eau utilisée. Cette eau peut s'avérer la source principale des éventuelles contaminations et altérations des aliments. Notre but est d'évaluer la qualité bactériologique de l'eau utilisée par les industries agroalimentaires dans la région du Nord du Maroc, d'identifier les différents germes responsables de la pollution de ces eaux et de définir les principales causes de cette pollution. Méthodes Des échantillons d'eau prélevés aux robinets ou des puits ont été analysés pour la recherche des germes indicateurs de la pollution (coliformes totaux (CT), coliformes fécaux (CF), entérocoques intestinaux (E), microorganismes revivifiables (MOR), anaérobies sulfitoréducteurs) et les germes pathogènes (Salmonelles, Staphylocoques, Pseudomonas aeruginosa). Le dénombrement des bactéries a été fait par la technique de filtration et par incorporation en milieu solide en surfusion. Résultats Les résultats ont montré que les eaux du réseau public ont été de qualité bactériologique satisfaisante tandis que 40% des eaux des puits ont été non conformes aux normes à cause de la présence des indicateurs de pollution CT, CF, E et MOR. En revanche, les germes pathogènes, en particulier les Salmonelles, ont été absents dans les eaux de tous les puits analysés. Conclusion La pollution de ces puits a été généralement liée au non-respect des conditions de puisage hygiéniques. La qualité bactériologique des eaux de ces puits peut être améliorée par une protection adéquate. PMID:28450992

Oxygen-assisted charge transfer between ZnO quantum dots and graphene.

Science.gov (United States)

Guo, Wenhao; Xu, Shuigang; Wu, Zefei; Wang, Ning; Loy, M M T; Du, Shengwang

2013-09-23

Efficient charge transfer between ZnO quantum dots (QDs) and graphene is demonstrated by decorating ZnO QDs on top of graphene, with the assistance of oxygen molecules from the air. The electrical response of the device to UV light is greatly enhanced, and a photoconductive gain of up to 10(7) can be obtained. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Spin-polarized electron gas in Co2MSi/SrTiO3(M= Ti, V, Cr, Mn, and Fe) heterostructures

KAUST Repository

Nazir, S.

2016-06-08

Spin-polarized density functional theory is used to study the TiO2 terminated interfaces between the magnetic Heusler alloys Co2Si (M = Ti, V, Cr, Mn, and Fe) and the non-polar band insulator SrTiO3. The structural relaxation at the interface turns out to depend systematically on the lattice mis- match. Charge transfer from the Heusler alloys (mainly the M 3d orbitals) to the Ti dxy orbitals of the TiO2 interface layer is found to gradually grow from M = Ti to Fe, resulting in an electron gas with increasing density of spin-polarized charge carriers. (© 2016 WILEY-VCH Verlag GmbH &Co. KGaA, Weinheim). © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

ZnO Nanorods on a LaAlO 3 -SrTiO 3 Interface: Hybrid 1D-2D Diodes with Engineered Electronic Properties

KAUST Repository

Bera, Ashok

2015-12-28

Integrating nanomaterials with different dimensionalities and properties is a versatile approach toward realizing new functionalities in advanced devices. Here, a novel diode-type heterostructure is reported consisting of 1D semiconducting ZnO nanorods and 2D metallic LaAlO3-SrTiO3 interface. Tunable insulator-to-metal transitions, absent in the individual components, are observed as a result of the competing temperature-dependent conduction mechanisms. Detailed transport analysis reveals direct tunneling at low bias, Fowler-Nordheim tunneling at high forward bias, and Zener breakdown at high reverse bias. Our results highlight the rich electronic properties of such artificial diodes with hybrid dimensionalities, and the design principle may be generalized to other nanomaterials. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

ZnO Nanorods on a LaAlO 3 -SrTiO 3 Interface: Hybrid 1D-2D Diodes with Engineered Electronic Properties

KAUST Repository

Bera, Ashok; Lin, Weinan; Yao, Yingbang; Ding, Junfeng; Lourembam, James; Wu, Tao

2015-01-01

Integrating nanomaterials with different dimensionalities and properties is a versatile approach toward realizing new functionalities in advanced devices. Here, a novel diode-type heterostructure is reported consisting of 1D semiconducting ZnO nanorods and 2D metallic LaAlO3-SrTiO3 interface. Tunable insulator-to-metal transitions, absent in the individual components, are observed as a result of the competing temperature-dependent conduction mechanisms. Detailed transport analysis reveals direct tunneling at low bias, Fowler-Nordheim tunneling at high forward bias, and Zener breakdown at high reverse bias. Our results highlight the rich electronic properties of such artificial diodes with hybrid dimensionalities, and the design principle may be generalized to other nanomaterials. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Optical properties and crystallization kinetics of (TeO{sub 2})(ZnO)(TiO{sub 2}) glasses

Energy Technology Data Exchange (ETDEWEB)

Kabalci, Idris [Department of Physics Education, Education Faculty, Harran University, Sanliurfa (Turkey); Koerpe, Nese Oeztuerk [Department of Materials Science, Eskisehir, Osmangazi University, Eskisehir (Turkey); Duran, Tugba; Oezdemir, Mustafa [Department of Physics, Science and Arts Faculty, Marmara University, Istanbul (Turkey)

2011-09-15

Ternary tellurite based glasses in the (TeO{sub 2})(ZnO)(TiO{sub 2}) system were prepared and its optical properties and crystallization kinetics investigated by using UV-VIS spectrophotometer and differential thermal analyzer (DTA). All the glasses were transparent from visible to near infrared region for different ZnO glass compositions (x=0.05, 0.10, 0.20, and 0.30 mol). In the experiment, optical band gap and Urbach energies were estimated from the optical absorption spectra between 400 and 800 nm wavelength region. The observed results confirm that the addition of ZnO glass composition from 0.05 to 0.30 mol increases the optical band gap energy from 2.94 to 3.0 eV. In addition, glass transition (T{sub g}), crystallization (T{sub p}) and melting temperature (T{sub m}) were determined by using the DTA plots. Finally, DTA results obtained with a heating rate of 20 C/min show that the peak crystallization temperature increases from 463 to 533 C as the ZnO content increases from 0.05 to 0.30 mol (copyright 2011 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Broadband ˜2μm emission in Tm3+/Ho3+ co-doped TeO2-WO3-La2O3 glass

Science.gov (United States)

Li, Kefeng; Wang, Guonian; Zhang, Junjie; Hu, Lili

2010-10-01

In this work, we report the infrared emission properties of Tm 3+/Ho 3+ co-doped TeO 2-WO 3-La 2O 3 (TWL) glass under 808 nm laser excitation. A broad and flat emission from 1600 to 2200 nm corresponding to the Tm 3+ ( 3F 4→ 3H 6) and Ho 3+ ( 5I 7→ 5I 8) emissions is observed. The full width at half maximum (FWHM) of this broadband increases up to a value of ˜370 nm with an optimal [Tm 3+]/[Ho 3+] concentration ratio. The energy transfer processes of Tm 3+↔Ho 3+ are analyzed and the results show that energy transfer between Tm 3+ and Ho 3+ plays an important role in the luminescence mechanism. The OH - influence on the broadband emission is also discussed. These results indicate that Tm 3+-Ho 3+ co-doped TWL glass could be a promising material for widely tunable laser or broadband amplifier applications.

Sequential Dy(OTf)3 -Catalyzed Solvent-Free Per-O-Acetylation and Regioselective Anomeric De-O-Acetylation of Carbohydrates.

Science.gov (United States)

Yan, Yi-Ling; Guo, Jiun-Rung; Liang, Chien-Fu

2017-09-19

Dysprosium(III) trifluoromethanesulfonate-catalyzed per-O-acetylation and regioselective anomeric de-O-acetylation of carbohydrates can be tuned by adjusting the reaction medium. In this study, the per-O-acetylation of unprotected sugars by using a near-stoichiometric amount of acetic anhydride under solvent-free conditions resulted in the exclusive formation of acetylated saccharides as anomeric mixtures, whereas anomeric de-O-acetylation in methanol resulted in a moderate-to-excellent yield. Reactions with various unprotected monosaccharides or disaccharides followed by a semi-one-pot sequential conversion into the corresponding acetylated glycosyl hemiacetal also resulted in high yields. Furthermore, the obtained hemiacetals could be successfully transformed into trichloroimidates after Dy(OTf) 3 -catalyzed glycosylation. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

Minu moto : alati kõrgustesse! Dr. Hans O. A. Koehn, ADDINOL Lube Oil GmbH osanik - 80 / Hans O. A. Koehn ; interv. Mikk Mehide

Index Scriptorium Estoniae

Koehn, Hans O. A.

2006-01-01

Maailma tippkvaliteediga määrdeaineid tootva Saksa õlifirma Addinol osanik dr. Hans O. A. Koehn on üks juhtivaid isikuid Saksamaa mineraalõli majanduses, tööst õlifirmas Valvoline, edasisest karjäärist ning Addinoli osanikuks saamisest

Energies of the future in Nord-Pas de Calais. Which solutions to climate disruption - Global Report version 1.0, january 2008

International Nuclear Information System (INIS)

2008-01-01

This study aims at identifying means to be implemented in the Nord-Pas de Calais region to divide by four regional emissions of CO 2 , and to do it without the renewal of nuclear reactors located in Gravelines. A first part presents the methods used for this study, the hypotheses selected to elaborate scenarios, the presentation, results and comparison of various scenarios, and an assessment of energy imports. The second part addresses the different renewable energy resources of the region and their potential to reach the expected results. The third part reports the study of the evolution of transport organisation by 2050: pollutions related to transports, regional costs of these pollutions, dysfunctions and possible actions in the competition between transports modes (road, rail, river, sea, air). A chapter then addresses the issue of the relationship between urban planning and mobility. The next chapter discusses the possibilities of action in the building sector (housing and office building, policies to be implemented to comply with the chosen scenario). The possibilities of solar energy are then discussed

Corona Onset Characteristics of Bundle Conductors in UHV AC Power Lines at 2200 m Altitude

Directory of Open Access Journals (Sweden)

Shilong Huang

2018-04-01

Full Text Available The corona onset characteristic of bundle conductors is an important limiting factor for the design of UHV AC power lines in high-altitude areas. An experimental study on the corona characteristics of 8 × LGJ630, 6 × LGJ720, 8 × LGJ720 and 10 × LGJ720 bundle conductors commonly used in UHV power lines under dry and wet conductor conditions, as well as artificial moderate and heavy rain conditions, was conducted in Ping’an County, Xining City (elevation 2200 m. By using the tangent line method, the corona onset voltages and onset electric field of four types of conductors at high altitudes are obtained for the first time. In addition, the calculation model of corona onset voltage considering the outer strands’ effect on the electric field and the geometric factor in the corona cage in high altitude areas is established. The comparison of the calculation results and experimental results under dry conditions verifies the model’s correctness. Based on the results, an optimal selection scheme for high altitudes is proposed. The roughness coefficient was also calculated and analysed: the roughness coefficient of bundled conductors was between 0.59 and 0.77, and the roughness coefficient of the wet conductor was between the dry and rainy conditions. Both the experimental data and the calculation model can provide a reference for conductor selection for UHV AC power lines for use in high-altitude areas.

Efficient solar-assisted O2 reduction by a cofacial iron porphyrin dimer integrated to a p-CuBi2O4 photocathode prepared by a simple novel method.

Science.gov (United States)

Zahran, Zaki N; Mohamed, Eman A; Naruta, Yoshinori; Haleem, Ashraf

2017-10-04

A cofacial iron porphyrin hetero-dimer, Fe2TPFPP-TMP showed high electro-catalytic activity, selectivity, and stability for the O2 reduction to H2O both in homogeneous non-aqueous and heterogeneous neutral aqueous solutions. Moreover, when it is integrated to FTO/p-CuBi2O4 (FTO = fluorine doped tin oxide) photocathode prepared by a simple novel method, a remarkable efficient solar-assisted O2 reduction is achieved in neutral potassium phosphate (KPi) or basic NaOH solutions saturated with O2. © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Triatominae et Cactaceae : un risque pour la transmission de la Trypanosomose américaine dans le péridomicile (nord-est du Brésil

Directory of Open Access Journals (Sweden)

Emperaire L.

2006-06-01

Full Text Available Les observations de terrain réalisées dans le nord-est du Brésil ont montré la fréquente association, dans l’espace péridomiciliaire, entre un cactus, le Cereus jamacaru, la présence de nids dans ses branches et celle de Rhodnius neglectus et de Triatoma pseudomaculata, espèces vectrices du parasite Trypanosoma cruzi, agent de la maladie de Chagas. L’analyse des variables architecturales de cette Cactaceae montre que la présence de nids, et donc d’insectes, est inféodée aux pratiques traditionnelles de gestion de ce cactus. Cette étude souligne l’intérêt d’une approche intégrée de l’écologie des Triatominae pour l’identification des variables indicatrices de risque.

Emergence of the sub-THz central peak at phase transitions in artificial BaTiO3/(Ba,Sr)TiO3 superlattices

International Nuclear Information System (INIS)

Tikhonov, Yu.A.; Razumnaya, A.G.; Torgashev, V.I.; Zakharchenko, I.N.; Yuzyuk, Yu.I.; El Marssi, M.; Ortega, N.; Kumar, A.; Katiyar, R.S.

2015-01-01

A prominent central peak in the sub-THz frequency range was observed in the Raman spectra of BaTiO 3 /(Ba,Sr)TiO 3 (BT/BST) superlattice grown on (001)MgO substrate. Both soft and central mode show an anomaly around 200 K and 280 K, which can be correlated with orthorhombic to monoclinic phase transition of BST and BT, respectively. The observed temperature dependence of the central mode enabled us to explain rather broad temperature dependence of the dielectric permittivity previously observed in BT/BST superlattices. (copyright 2015 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

76 FR 9963 - Airworthiness Directives; Thielert Aircraft Engines GmbH Models TAE 125-02-99 and TAE 125-02-114...

Science.gov (United States)

2011-02-23

... Airworthiness Directives; Thielert Aircraft Engines GmbH Models TAE 125-02-99 and TAE 125-02-114 Reciprocating... TAE 125-02-99 and TAE 125-02-114 reciprocating engines installed in, but not limited to, Cessna 172... occurs later. Repetitive Replacements of Timing Chains for All TAE 125-02-99 and TAE 125-02-114 Engines...

Rb-Sr dating of strain-induced mineral growth in two ductile shear zones in the western gneiss region of Nord-Troendelag, Central Norway

International Nuclear Information System (INIS)

Piasecki, M.A.; Cliff, R.A.

1988-01-01

In the Bjugn district of the northern part of the Western Gneiss Region, Nord-Troendelag, a basement gneiss-cover nappe boundary is marked by a thick zone of ductile shearing. In this zone a layer-parallel mylonitic fabric with related new mineral growth overprints and retrogresses a previous fabric associated with a granulite facies mineral assemblage. Related minor shear belts contain abundant new minerals and vein systems, including pegmatites, believed to represent strain-induced products formed at the time of the shearing movements. Central parts of two large muscovite books from such a pegmatite yielded Rb-Sr, Early to Middle Devonian ages of 389±6 Ma and 386±6 Ma, interpreted as indicating the approximate time of pegmatite formation and of the shearing. Small, matrix-size muscovite and biotite grains from the host mylonite gave ages of 378±6 Ma and 365±5 Ma, respectively, supposed to relate to post-shearing uplift and cooling

Seasonal variation of atmospheric particle number concentrations, new particle formation and atmospheric oxidation capacity at the high Arctic site Villum Research Station, Station Nord

Directory of Open Access Journals (Sweden)

Q. T. Nguyen

2016-09-01

Full Text Available This work presents an analysis of the physical properties of sub-micrometer aerosol particles measured at the high Arctic site Villum Research Station, Station Nord (VRS, northeast Greenland, between July 2010 and February 2013. The study focuses on particle number concentrations, particle number size distributions and the occurrence of new particle formation (NPF events and their seasonality in the high Arctic, where observations and characterization of such aerosol particle properties and corresponding events are rare and understanding of related processes is lacking.A clear accumulation mode was observed during the darker months from October until mid-May, which became considerably more pronounced during the prominent Arctic haze months from March to mid-May. In contrast, nucleation- and Aitken-mode particles were predominantly observed during the summer months. Analysis of wind direction and wind speed indicated possible contributions of marine sources from the easterly side of the station to the observed summertime particle number concentrations, while southwesterly to westerly winds dominated during the darker months. NPF events lasting from hours to days were mostly observed from June until August, with fewer events observed during the months with less sunlight, i.e., March, April, September and October. The results tend to indicate that ozone (O3 might be weakly anti-correlated with particle number concentrations of the nucleation-mode range (10–30 nm in almost half of the NPF events, while no positive correlation was observed. Calculations of air mass back trajectories using the Hybrid Single Particle Lagrangian Integrated Trajectory (HYSPLIT model for the NPF event days suggested that the onset or interruption of events could possibly be explained by changes in air mass origin. A map of event occurrence probability was computed, indicating that southerly air masses from over the Greenland Sea were more likely linked to those

Chemoenzymatic assembly of mammalian O-mannose glycans.

Science.gov (United States)

Cao, Hongzhi; Meng, Caicai; Sasmal, Aniruddha; Zhang, Yan; Gao, Tian; Liu, Chang-Cheng; Khan, Naazneen; Varki, Ajit; Wang, Fengshan

2018-05-26

O-Mannose glycans account up to 30% of total O-glycans in brain. Previous synthesis and functional studies only focused on the Core M3 O-mannose glycans of α-dystroglycan which are a causative factor for various muscular diseases. In this study, a highly efficient chemoenzymatic strategy was developed that enabled the first collective synthesis of 63 Core M1 and Core M2 O-mannose glycans. This chemoenzymatic strategy features the gram-scale chemical synthesis of 5 judiciously designed core structures, and the diversity-oriented modification of the core structures with 3 enzyme modules to provide 58 complex O-mannose glycans in a linear sequence that does not exceed 4 steps. The binding profiles of synthetic O-mannose glycans with a panel of lectins, antibodies and brain proteins were also explored using the printed O-mannose glycan array. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

The novel transparent sputtered p-type CuO thin films and Ag/p-CuO/n-Si Schottky diode applications

Directory of Open Access Journals (Sweden)

A. Tombak

2015-01-01

Full Text Available In the current paper, the physical properties and microelectronic parameters of direct current (DC sputtered p-type CuO film and diode have been investigated. The film of CuO as oxide and p-type semiconductor is grown onto glass and n-Si substrates by reactive DC sputtering at 250 °C. After deposition, a post-annealing procedure is applied at various temperatures in ambient. Through this research, several parameters are determined such structural, optical and electrical magnitudes. The thickness of CuO thin films goes from 122 to 254 nm. A (111-oriented cubic crystal structure is revealed by X-ray analysis. The grain size is roughly depending on the post-annealing temperature, it increases with temperature within the 144–285 nm range. The transmittance reaches 80% simultaneously in visible and infrared bands. The optical band gap is varied between 1.99 and 2.52 eV as a result of annealing temperature while the resistivity and the charge carrier mobility decrease with an increase in temperature from 135 to 14 Ω cm and 0.92 to 0.06 cm2/Vs, respectively. The surface of samples is homogenous, bright dots are visible when temperature reaches the highest value. As a diode, Ag/CuO/n-Si exhibits a non-ideal behavior and the ideality factor is about 3.5. By Norde method, the barrier height and the series resistance are extracted and found to be 0.96 V and 86.6 Ω respectively.

Interface Control of Ferroelectricity in an SrRuO3 /BaTiO3 /SrRuO3 Capacitor and its Critical Thickness.

Science.gov (United States)

Shin, Yeong Jae; Kim, Yoonkoo; Kang, Sung-Jin; Nahm, Ho-Hyun; Murugavel, Pattukkannu; Kim, Jeong Rae; Cho, Myung Rae; Wang, Lingfei; Yang, Sang Mo; Yoon, Jong-Gul; Chung, Jin-Seok; Kim, Miyoung; Zhou, Hua; Chang, Seo Hyoung; Noh, Tae Won

2017-05-01

The atomic-scale synthesis of artificial oxide heterostructures offers new opportunities to create novel states that do not occur in nature. The main challenge related to synthesizing these structures is obtaining atomically sharp interfaces with designed termination sequences. In this study, it is demonstrated that the oxygen pressure (PO2) during growth plays an important role in controlling the interfacial terminations of SrRuO 3 /BaTiO 3 /SrRuO 3 (SRO/BTO/SRO) ferroelectric (FE) capacitors. The SRO/BTO/SRO heterostructures are grown by a pulsed laser deposition method. The top SRO/BTO interface, grown at high PO2 (around 150 mTorr), usually exhibits a mixture of RuO 2 -BaO and SrO-TiO 2 terminations. By reducing PO2, the authors obtain atomically sharp SRO/BTO top interfaces with uniform SrO-TiO 2 termination. Using capacitor devices with symmetric and uniform interfacial termination, it is demonstrated for the first time that the FE critical thickness can reach the theoretical limit of 3.5 unit cells. © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Bases del intercambio entre las sociedades norperuanas y surecuatorianas: una zona de transición entre 1500 A.C. y 600 D.C

Directory of Open Access Journals (Sweden)

1993-01-01

Full Text Available BASES DE L'ECHANGE ENTRE LES SOCIETES NORD-PERUVIENNES ET SUD-EQUATORIENNES : UNE ZONE DE TRANSITION ENTRE 1500 AV. J.C. ET 600 AP. J.C. Cet article est le fruit d’une tentative de coopération entre des chercheurs qui travaillent en Équateur et au Pérou, pour relier les deux aires culturelles nettement différenciées, nord-andine et centre-andine, à partir de la définition et de l’étude d’une zone de transition, localisée entre le Río Jubones dans le sud de l'Équateur et le Río Olmos dans le nord du Pérou, entre environ 1500 av. J.C. et 600 ap. J.C. El artículo es resultado de un intento de cooperación entre investigadores que trabajan el Ecuador y el Perú para vincular las dos áreas culturales marcadamente diferenciadas, norandina y centroandina, a partir de la definición y estudio de una zona de transición, localizada entre el río Jubones, al sur de Ecuador y el Río Olmos, al norte de Perú, entre aproximadamente 1500 AC y 600 DC. BASIS OF THE EXCHANGE BETWEEN NORTH PERUVIAN AND SOUTH ECUATORIAN SOCIETIES: A TRANSITIONAL ZONE BETWEEN 1500 B.C. AND 600 A.C. This paper is a collaborative effort by researchers working in Ecuador and Peru, to explore the relationship between two clearly differentiated cultural areas (North and Central Andes on the basis of a definition and study of the prehistory transitional zone located between Río Jubones in Southern Ecuador and Río Olmos in Northern Peru between 1500 B.C. and 600 A.C.

Transient, biocompatible electronics and energy harvesters based on ZnO.

Science.gov (United States)

Dagdeviren, Canan; Hwang, Suk-Won; Su, Yewang; Kim, Stanley; Cheng, Huanyu; Gur, Onur; Haney, Ryan; Omenetto, Fiorenzo G; Huang, Yonggang; Rogers, John A

2013-10-25

The combined use of ZnO, Mg, MgO, and silk provides routes to classes of thin-film transistors and mechanical energy harvesters that are soluble in water and biofluids. Experimental and theoretical studies of the operational aspects and dissolution properties of this type of transient electronics technology illustrate its various capabilities. Application opportunities range from resorbable biomedical implants, to environmentally dissolvable sensors, and degradable consumer electronics. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Non-random mating and convergence over time for alcohol consumption, smoking, and exercise: the Nord-Trøndelag Health Study.

Science.gov (United States)

Ask, Helga; Rognmo, Kamilla; Torvik, Fartein Ask; Røysamb, Espen; Tambs, Kristian

2012-05-01

Spouses tend to have similar lifestyles. We explored the degree to which spouse similarity in alcohol use, smoking, and physical exercise is caused by non-random mating or convergence. We used data collected for the Nord-Trøndelag Health Study from 1984 to 1986 and prospective registry information about when and with whom people entered marriage/cohabitation between 1970 and 2000. Our sample included 19,599 married/cohabitating couples and 1,551 future couples that were to marry/cohabitate in the 14-16 years following data collection. All couples were grouped according to the duration between data collection and entering into marriage/cohabitation. Age-adjusted polychoric spouse correlations were used as the dependent variables in non-linear segmented regression analysis; the independent variable was time. The results indicate that spouse concordance in lifestyle is due to both non-random mating and convergence. Non-random mating appeared to be strongest for smoking. Convergence in alcohol use and smoking was evident during the period prior to marriage/cohabitation, whereas convergence in exercise was evident throughout life. Reduced spouse similarity in smoking with relationship duration may reflect secular trends.

Food as a linking device among the Guidar of North Cameroon La nourriture comme lien entre Guidar du nord-Cameroun

Directory of Open Access Journals (Sweden)

Forka Leypey Mathew Fomine

2009-07-01

Full Text Available This article elucidates and illuminates food as a powerful device that established and strengthened cultural and commercial relationships among the Guidar of North Cameroon and between the Guidar and their neighbouring ethnic groups. During cultural ceremonies such as traditional wedding, death celebration, funeral entertainment, naming ceremony and group circumcision, the Guidar collectively consumed diverse food items that established and cemented cultural relationships among them. Food also aided in establishing commercial relationships between the Guidar and Moundang, Massa, Tupuri, Bamileke from Cameroon and the Sara from the Republic of Chad.Cet article montre le pouvoir instrumental alimentaire qui établit et renforce les relations culturelles et commerciales parmi les peuples Guidar du nord-Cameroun et différentes entités ethniques voisines. Durant les cérémonies traditionnelles telles que les mariages, les funérailles, les circoncisions en groupes, les peuples Guidar collectivement consomment un large éventail de produits alimentaires qui établissent et renforcent les relations culturelles. La nourriture également favorise l’établissement de relations commerciales entre les peuples Guidar, Moundang, Massa, Toupouri, Bamileke et les peuples Sara de la République du Tchad.

Au@MnO2 core-shell nanomesh electrodes for transparent flexible supercapacitors.

Science.gov (United States)

Qiu, Tengfei; Luo, Bin; Giersig, Michael; Akinoglu, Eser Metin; Hao, Long; Wang, Xiangjun; Shi, Lin; Jin, Meihua; Zhi, Linjie

2014-10-29

A novel Au@MnO2 supercapacitor is presented. The sophisticated core-shell architecture combining an Au nanomesh core with a MnO2 shell on a flexible polymeric substrate is demonstrated as an electrode for high performance transparent flexible supercapacitors (TFSCs). Due to their unique structure, high areal/gravimetric capacitance and rate capability for TFSCs are achieved. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Regional prospective and strategy for energy. A comparison of scenarios for the Pays-de-la-Loire, Nord-Pas-de-Calais, and Provence-Cote-d'Azur regions

International Nuclear Information System (INIS)

Fink, Meike

2014-01-01

A report proposes an overview of prospective studies in France. It discusses the criteria which distinguish various prospective scenarios, comments the emergence of a shared and common vocabulary for prospective studies, proposes a historical overview of prospective studies on energy in France, and a qualitative comparison of ten prospective regional studies in France. In a second part, it reports a data-based and qualitative analysis of scenarios for three regions (Pays de la Loire, Nord Pas de Calais, and Provence-Alps-Cote d'Azur): methodology, context of elaboration of prospective studies and comparison of scenarios in the three regions, data for years of reference, used variables, compliance with national commitments, application to different sectors (industry, agriculture, building, transports), analysis of energy supply. A first version of this report is provided

Pd/PdO functionalization of SnO{sub 2} nanowires and ZnO nanotetrapods

Energy Technology Data Exchange (ETDEWEB)

De Zorzi, C.; Rossetto, G. [ICIS-CNR, Padova (Italy); Calestani, D.; Zha, M.Z.; Zappettini, A.; Lazzarini, L.; Villani, M.; Zanotti, L. [IMEM-CNR, Parma (Italy); El Habra, N. [ICIS-CNR, Padova (Italy); Dipt. Scienze Chimiche, Universita di Padova (Italy)

2011-08-15

Tin oxide (SnO{sub 2}) and zinc oxide (ZnO) nanostructures are widely studied because of their peculiar physical and chemical properties and the large number of possible application fields. Surface functionalization of these materials is a very important topic because it is a powerful tool for modifying or tuning their properties, in order to better match the device requests. For example, palladium/palladium oxide (Pd/PdO) nanoparticles are often used to enhance selectivity of chemoresistive gas sensing properties of metal-oxide nanostructures. SnO{sub 2} nanowires and ZnO nanotetrapods have been grown on large areas by a combination of metal evaporation and controlled oxidation, while a MOCVD (Metal Organic Chemical Vapor Deposition) process has been chosen in order to deposit Pd/PdO nanoparticles on the surface of the obtained oxide nanostructures. Samples morphology, structure and composition have been studied by means of SEM and TEM microscopy, EDS microanalysis and X-Ray diffraction. The different results, obtained as a function of the synthesis and annealing parameters, are discussed focusing the attention to the experimental conditions that allowed the authors to obtain an optimal ''spotted'' coverage of oxide nanostructures, which is often required for gas sensing application. (copyright 2011 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Photocatalytic overall water splitting promoted by an α-β phase junction on Ga2O3.

Science.gov (United States)

Wang, Xiang; Xu, Qian; Li, Mingrun; Shen, Shuai; Wang, Xiuli; Wang, Yaochuan; Feng, Zhaochi; Shi, Jingying; Han, Hongxian; Li, Can

2012-12-21

When Alpha met Beta: a tuneable α-β surface phase junction on Ga(2)O(3) can significantly improve photocatalytic overall water splitting into H(2) and O(2) over individual α-Ga(2)O(3) or β-Ga(2)O(3) surface phases. This enhanced photocatalytic performance is mainly attributed to the efficient charge separation and transfer across the α-β phase junction. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

« Murayana va à Garma cette année ! » : cérémonies publiques et rituels contemporains du nord-est de la Terre d’Arnhem (Australie)

OpenAIRE

De Largy Healy, Jessica

2011-01-01

Partant de l’idée que les cérémonies yolngu du nord-est de la Terre d'Arnhem (Australie) relèvent de négociations dynamiques entre des individus, des clans et des ancêtres, cet article examine comment une série d'échanges rituels furent articulés dans le cadre d’un festival culturel ouvert aux touristes. Je montre comment un projet de patrimonialisation numérique insuffla un élan de créativité rituelle dans plusieurs localités de la région et aboutit à une véritable campagne de représentation...

76 FR 27861 - Airworthiness Directives; Diamond Aircraft Industries GmbH Models DA 42, DA 42 NG, and DA 42 M-NG...

Science.gov (United States)

2011-05-13

... Airworthiness Directives; Diamond Aircraft Industries GmbH Models DA 42, DA 42 NG, and DA 42 M-NG Airplanes... on Diamond aeroplanes, the majority of which were DA 40. In additional, at least 18 doors have been... conditions) while the aeroplane was parked. All DA 40 and DA 42 aeroplanes have a system installed that...

The association between diabetes mellitus, glucose, and chronic musculoskeletal complaints. Results from the Nord-Trøndelag Health Study

Directory of Open Access Journals (Sweden)

Zwart John-Anker

2008-12-01

Full Text Available Abstract Background The relationship between diabetes mellitus (DM and chronic musculoskeletal complaints (MSCs is unclear. The aim of this study was to investigate the association between DM, non-fasting glucose and chronic MSCs defined as pain and/or stiffness ≥ 3 months during the past year in the general adult population. Methods The results were based on cross-sectional data from 64,785 men and women (aged ≥ 20 years who participated in the Nord-Trøndelag Health Survey, which included 1,940 individuals with known DM. Associations were assessed using multiple logistic regression, estimating prevalence odds ratio (OR with 95% confidence intervals (CIs. Results High non-fasting glucose was associated with a lower prevalence of chronic MSCs compared to a low glucose level. DM was associated with higher prevalence of chronic MSCs, in particular chronic widespread MSCs. In the multivariate analysis, adjusting for glucose level, BMI, age, gender and physical activity, chronic widespread MSCs was 1.6 times more likely (OR = 1.6, 95% CI 1.2–2.2 among individuals Conclusion In this cross-sectional study a high non-fasting glucose was associated with lower prevalence of chronic MSCs. Among individuals with known DM chronic widespread MSCs were more likely.

Synthesis, single crystal growth and thermodynamic properties of SrNdAlO4-CaNdAlO4 solid solutions

International Nuclear Information System (INIS)

Novoselov, A.; Ryumin, M.; Pushkina, G.; Spiridonov, F.; Komissarova, L.; Zimina, G.; Pajaczkowska, A.

2005-01-01

Continuous solid solutions in the SrNdAlO 4 -CaNdAlO 4 system are formed. Powder samples of Sr x Ca 1-x NdAlO 4 (0.0≤x≤1.0) were obtained using the carbonate coprecipitation method while single crystals of Sr x Ca 1-x NdAlO 4 (x=0.0,0.162,0.392,0.687,1.0) were grown by the Czochralski method. Structural parameters and thermodynamic properties of the samples were studied by X-ray diffraction and heat flux Calvet calorimetry. Composition dependence of lattice constants was observed to follow Vegard's low. Heat of solution of the Sr x Ca 1-x NdAlO 4 samples in molten 2PbO.B 2 O 3 were measured, and enthalpies of formation and mixing were calculated. (copyright 2005 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

The ''Société Géologique du Nord'' (SGN) and Earth Sciences in Northern France; La « Société Géologique du Nord » y las ciencias de la tierra en el norte de Francia

Energy Technology Data Exchange (ETDEWEB)

Blieck, A.; Meilliez, F.

2016-10-01

The ''Société Géologique du Nord'', located in Lille, in northern France, was founded in 1870, with Jules Gosselet as the first president. It has always been closely connected to the geology department of the Faculty of Sciences of Lille, now called the ''Université de Lille Sciences et Technologies'', and keeps strong links with the Natural History Museum of Lille. Its activities and evolution were closely related to those of the coal-mining basin of the area until the last shaft was closed in 1990. Its activities are both in the fields of applied and fundamental geosciences. From its beginning, the Society has published the results of the research of its members, both in a periodical journal, the Annales, and as monographies called Mémoires. From the 1970s, the Mémoires have been progressively replaced by Publications, mostly devoted to State doctoral theses. During the transition from the 20th to the 21st century, the activities of the Society have strongly declined, due to several internal and external factors. Since the beginning of the 21st century, the SGN has tried to adapt itself to the new conditions of both the university and the regional territory. It is still a scientific society, but it is open to its social environment. (Author) [French] La « Société Géologique du Nord » tiene su sede en Lille, en el norte de Francia. Se fundó en 1870, con Jules Gosselet como primer presidente. Siempre ha estado vinculada al Departamento de Geología de la Facultad de Ciencias de Lille, actualmente Université de Lille – Sciences et Technologies, y mantiene fuertes vínculos con el Museo de Historia Natural de Lille. Sus actividades y su evolución han estado relacionadas con las de la cuenca minera (hullera) de la región, hasta que, en 1990, cerró el último pozo de mina. Sus intereses son, a la vez, en el campo de las geociencias fundamentales y aplicadas. Desde su fundación, la Sociedad ha publicado los

76 FR 12627 - Airworthiness Directives; Diamond Aircraft Industries GmbH Models DA 42, DA 42 NG, and DA 42 M-NG...

Science.gov (United States)

2011-03-08

... Industries GmbH Models DA 42, DA 42 NG, and DA 42 M-NG Airplanes AGENCY: Federal Aviation Administration (FAA... on Diamond aeroplanes, the majority of which were DA 40. In additional, at least 18 doors have been... conditions) while the aeroplane was parked. All DA 40 and DA 42 aeroplanes have a system installed that...

Multifunctional MgO Layer in Perovskite Solar Cells.

Science.gov (United States)

Guo, Xudong; Dong, Haopeng; Li, Wenzhe; Li, Nan; Wang, Liduo

2015-06-08

A multifunctional magnesium oxide (MgO) layer was successfully introduced into perovskite solar cells (PSCs) to enhance their performance. MgO was coated onto the surface of mesoporous TiO(2) by the decomposition of magnesium acetate and, therefore, could block contact between the perovskite and TiO(2). X-ray photoelectron spectroscopy and infrared spectroscopy showed that the amount of H(2)O/hydroxyl absorbed on the TiO(2) decreased after MgO modification. The UV/Vis absorption spectra of the perovskite with MgO modification revealed an enhanced photoelectric performance compared with that of unmodified perovskite after UV illumination. In addition to the photocurrent, the photovoltage and fill factor also showed an enhancement after modification, which resulted in an increase in the overall efficiency of the cell from 9.6 to 13.9 %. Electrochemical impedance spectroscopy (EIS) confirmed that MgO acts as an insulating layer to reduce charge recombination. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Calcium manganese oxides as oxygen evolution catalysts: O2 formation pathways indicated by 18O-labelling studies.

Science.gov (United States)

Shevela, Dmitriy; Koroidov, Sergey; Najafpour, M Mahdi; Messinger, Johannes; Kurz, Philipp

2011-05-02

Oxygen evolution catalysed by calcium manganese and manganese-only oxides was studied in (18)O-enriched water. Using membrane-inlet mass spectrometry, we monitored the formation of the different O(2) isotopologues (16)O(2), (16)O(18)O and (18)O(2) in such reactions simultaneously with good time resolution. From the analysis of the data, we conclude that entirely different pathways of dioxygen formation catalysis exist for reactions involving hydrogen peroxide (H(2)O(2)), hydrogen persulfate (HSO(5)(-)) or single-electron oxidants such as Ce(IV) and [Ru(III) (bipy)(3)](3+) . Like the studied oxide catalysts, the active sites of manganese catalase and the oxygen-evolving complex (OEC) of photosystem II (PSII) consist of μ-oxido manganese or μ-oxido calcium manganese sites. The studied processes show very similar (18)O-labelling behaviour to the natural enzymes and are therefore interesting model systems for in vivo oxygen formation by manganese metalloenzymes such as PSII. Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

A competência comunicativa em LE ampliada pela teoria funcionalista de tradução: uma proposta didática

Directory of Open Access Journals (Sweden)

Maria José Laiño

2017-08-01

Full Text Available O presente trabalho pretende apresentar uma sugestão de sequência didática (SD, na qual são abordadas atividades em torno do gênero discursivo tirinhas, com o intuito de preparar os alunos participantes da pesquisa à elaboração de uma atividade tradutória de algumas tiras da Mafalda. Inspirada pelos pressupostos teóricos de Dolz, Noverraz e Schneuwly (2004, a SD está composta por sete etapas, aplicadas aos alunos de graduação de um Curso de Letras – Português e Espanhol de uma universidade federal, em 2015.1. O marco teórico que dá suporte à SD está ancorado nos preceitos funcionalistas de tradução, elucidados por Nord (2010, nos quais elementos como o destinatário, o contexto sociocultural e o gênero discursivo envolvido são importantes para que o tradutor/aluno seja capaz de otimizar seu processo tradutório e elaborar uma tradução funcionalista. Com esta proposta de trabalho, o escopo se volta ao uso da tradução pedagógica em sala de aula, isto é, ao uso de atividades tradutórias com o objetivo de auxiliar o desenvolvimento das habilidades que compõem o aprendizado de uma língua estrangeira. Ao longo da SD, os estudantes partícipes relataram que puderam revisitar e ampliar seus conceitos de tradução, uma vez que estavam influenciados pelo Método Gramática e Tradução.

A primary assessment of a daybreak 2200 OSL reader using fine grain quartz and CaSO4:Tm TLD

International Nuclear Information System (INIS)

Zhang Keqi; Chen Jie; Lu Yanchou; Wang Changsheng; Yang Chuancheng

2007-01-01

Daybreak 2200 OSL readers are widely used for luminescence dating applications. As the sample irradiation and illumination may affect discs in adjacent positions, it is critical to confirm that these factors do not introduce significant systematic errors. Effects of cross-irradiation and cross-bleaching were examined and quantified using fine-grain quartz and highly sensitive CaSO 4 :Tm dosimeters, and the irradiation offset time was measured. The cross-bleaching effect on adjacent aliquots is non-linear with no more than 15% OSL signal reduction following 10ks illumination with the power of blue LED being at 95% maximum. But at positions other than the nearest neighboring sample, almost no effect of cross-bleaching was found. The cross-talk dose, even to the nearest samples, was about 0.02% of the applied dose, and it decreased with increasing distance from the source. Offset time of the built-in Beta source shutter is 0.22 s, which can be neglected in regular dating, and leak dose of the source can be ignored as well. Finally, measurement consistency at Position 0.5, 10, ..... and 55 of the sample tray is better than 3% in relative standard deviation. (authors)

Local piezoelectric response of ZnO nanoparticles embedded in a photosensitive polymer

Energy Technology Data Exchange (ETDEWEB)

Prashanthi, K.; Zhang, H.; Thundat, T. [Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta (Canada); Ramgopal Rao, V. [Department of Electrical Engineering, Indian Institute of Technology, Bombay, Mumbai (India)

2012-02-15

Local piezoelectric properties of ZnO nanoparticles (NPs) embedded in a photo-epoxy polymer are investigated by piezoresponse force microscopy (PFM). Integrating ZnO NPs into a photosensitive SU-8 polymer matrix not only retains the highly desired piezoelectric properties of the ZnO, but also preserves photosensitivity and optical transparency of the SU-8 polymer. These results have strong implications for simple photolithography based low-cost fabrication of piezoelectric microelectromechanicalsystems (MEMS) and nanoelectromechanicalsystems (NEMS) in both sensing and energy harvesting applications. (copyright 2012 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Un aspect de la représentation politique municipale : le nombre d’élus et leur mode de répartition dans les villes nord-américaines (Canada, États-Unis)

OpenAIRE

Hulbert, François

2007-01-01

Si en France toutes les communes de population comparable disposent d’un nombre égal d’élus municipaux, il en va tout autrement au Canada et aux États-Unis. A partir d’un échantillon de cent villes nord-américaines, l’analyse montre une grande disparité dans la représentation politique : le nombre de conseillers municipaux est le plus souvent faible eu égard à la situation en France et les écarts d’une ville à l’autre sont très importants. Avec respectivement 51 et 50 élus, New York (8,1 mill...

Colossal thermoelectric power factor in K7/8RhO2

KAUST Repository

Saeed, Yasir

2012-04-12

The thermoelectric properties of the layered oxides KxRhO 2 (x = 1/2 and 7/8) are investigated by means of the electronic structure, as determined by ab inito calculations and Boltzmann transport theory. In general, the electronic structure of K xRhO 2 is similar to Na xCoO 2, but with strongly enhanced transport. K 7/8RhO 2 exceeds the ultrahigh power factor of Na 0.88CoO 2 reported previously by more than 50%. The roles of the cation concentration and the lattice parameters in the transport properties in this class of compounds are explained. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

An update on the thermodynamics of Ta2O5

International Nuclear Information System (INIS)

Jacob, K.T.; Shekhar, Chander; Waseda, Y.

2009-01-01

Using a solid-state electrochemical cell incorporating yttria-doped thoria (YDT) as the electrolyte and a mixture of (Mn + MnO) as the reference electrode, standard Gibbs free energy of formation of β-Ta 2 O 5 has been determined as a function of temperature in the range (1000 to 1300) K. The solid-state electrochemical cell used can be represented as (-)Pt,Ta+Ta 2 O 5 //(Y 2 O 3 )ThO 2 //Mn+MnO,Pt(+) Combining the reversible e.m.f. of the cell with recent data on the free energy of formation of MnO, standard Gibbs free energy of formation of Ta 2 O 5 from Ta metal and diatomic oxygen gas (O 2 ) in the temperature range (1000 to 1300) K is obtained: Δ f G 0 ±0.35/(kJ.mol -1 )=-2004.376+0.40445(T/K). Because of the significant solid solubility of oxygen in tantalum, a small correction for the activity of Ta in the metal phase in equilibrium with Ta 2 O 5 is applied. An analysis of the results obtained in this study and other free energy data reported in the literature by the 'third law' method suggests the need for refining data for Ta 2 O 5 reported in thermodynamic compilations. Used in the analysis is a revised value for standard entropy of Ta 2 O 5 based on more recent low-temperature heat capacity measurements. An improved set of thermodynamic properties of ditantalum pentoxide (Ta 2 O 5 ) are presented in the temperature range (298.15 to 2200) K.

Chemical and isotopic tracing of underground water in relation with leaching of mine spoils, Nord-Pas-de-Calais Coal Basin (France); Tracage chimique et isotopique des eaux souterraines en relation avec les eaux de lixiviation de terrils, bassin minier du Nord-Pas-de-Calais (France)

Energy Technology Data Exchange (ETDEWEB)

Denimal, S.; Tribovillard, N.; Meilliez, F. [Lille-1 Univ., Lab. de Sedimentologie et Geodynamique, UMR 8577, 59 - Villeneuve-d' Ascq (France); Barbecot, F.; Dever, L. [Paris-11 Univ., Lab. d' Hydrologie et de Geochimie Isotopique, UMR 8616, 91 - Orsay (France)

2001-07-01

Coal mining activity in the Nord-Pas-de-Calais region (Northern France) has generated many mine spoils. The oxidation of the pyrite content of such coal shales and their leaching can be a source of sulfate pollution for the underlying chalk aquifer, i.e. the main drinking water resource of the region. Two sites of study have been retained: one in the free water table zone and the other in the confined water table zone. Samples from both mine spoils have been analyzed with respect to their carbon and sulfur content and a superficial leaching of these elements has been evidenced. Water has been sampled in piezometers and boreholes close to the mine spoils and also along natural flux lines. The use of sulfur isotopes as markers of the different sulfate sources has confirmed the spoils source but has permitted to identify another source in the second site which is the Tertiary gypsum-bearing Ostricourt sands. This study has shown also that in the confined water table zone, part of the exported sulfates is reduced. This bacterial reduction of sulfates is due to a joint leaching of both carbon and sulfur in the mine spoils. A self-purification phenomenon occurs when the chalk aquifer is confined beneath the Cenozoic cover. (J.S.)

A facile route to large-scale synthesis MoO2 and MoO3 as electrode materials for high-performance supercapacitors

International Nuclear Information System (INIS)

Xuan, H.C.; Du, Y.W.; Zhang, Y.Q.; Xu, Y.K.; Li, H.; Han, P.D.; Wang, D.H.

2016-01-01

MoO 3 and MoO 2 materials have been successfully synthesized by thermal decomposition of ammonium paramolybdate in air and a sealed quartz tube, respectively. The microstructure of as-synthesized MoO 3 is composed of irregular lamellar plates with a plate thickness around 100 nm and MoO 2 has the larger grain size with lamellar plates connected with each other. A maximum specific capacitance of 318 F/g at 0.5 A/g is obtained for MoO 2 prepared in a closed environment. On the other hand, the sample MoO 3 exhibits excellent rate capacity with specific capacitances of 218, 209, 196, 188, 176, and 160 F/g at current densities of 0.5, 1, 2, 3, 4, and 5 A/g, respectively. These results pave the way to consider MoO 3 and MoO 2 as prospective materials for energy-storage applications. (copyright 2016 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Piezotronically modified double Schottky barriers in ZnO varistors.

Science.gov (United States)

Raidl, Nadine; Supancic, Peter; Danzer, Robert; Hofstätter, Michael

2015-03-25

Double Schottky barriers in ZnO are modified piezotronically by the application of mechanical stresses. New effects such as the enhancement of the potential barrier height and the increase or decrease of the natural barrier asymmetry are presented. Also, an extended model for the piezotronic modification of double Schottky barriers is given. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

The Shock and Vibration Bulletin. Part 4. Underwater Problems, Environments and Measurements

Science.gov (United States)

1974-08-01

COMPEN- SATED FOR SHAKER VELOCITY AND DISPLACEMENT LIMITATIONS D.O. Smallwood and A.R. Nord, Sandia Laboratories, Albuquerque, New Mexico A CASE...University of Oklahoma, Norman , Oklahoma STRUCTURAL DYNAMIC RESPONSE ANALYSIS OF ROCKET TEST SLEDS T.N. Gardner, Mechanics Research Incorporated, Los

Influence of hydrogen peroxide treatment on Au/n-ZnO contact

Energy Technology Data Exchange (ETDEWEB)

Chen, X.D.; Gu, Q.L.; Ling, C.C.; Djurisic, A.B. [Department of Physics, The University of Hong Kong, Pokfulam Road (China); Brauer, G.; Anwand, W.; Skorupa, W.; Reuther, H. [Institut fuer Ionenstrahlphysik und Materialforschung, Forschungszentrum Rossendorf, Postfach 510119, 01314 Dresden (Germany)

2007-07-01

The Au/n-ZnO contact behavior was investigated as a function of hydrogen peroxide pre-treatment of the ZnO sample by current-voltage (IV) measurement. The change from non-rectifying to rectifying performance upon etching was discussed in connection with sample characterization by positron annihilation spectroscopy (PAS), Auger electron spectroscopy (AES) and scanning electron microscopy (SEM). It was concluded that the gain of the rectifying property was properly associated with the formation of a defective interfacial region at the Au/n-ZnO contact. (copyright 2007 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

High-performance broadband photodetector using solution-processible PbSe-TiO(2)-graphene hybrids.

Science.gov (United States)

Manga, Kiran Kumar; Wang, Junzhong; Lin, Ming; Zhang, Jie; Nesladek, Milos; Nalla, Venkatram; Ji, Wei; Loh, Kian Ping

2012-04-03

Highly sensitive, multicomponent broadband photodetector devices are made from PbSe/graphene/TiO(2). TiO(2) and PbSe nanoparticles act as light harvesting photoactive materials from the UV to IR regions of the electromagnetic spectrum, while the graphene acts as a charge collector for both photogenerated holes and electrons under an applied electric field. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

EDTA-assisted synthesis of rose-like ZnO architectures

Energy Technology Data Exchange (ETDEWEB)

Li, Zhen [Institute of Nanochemistry and Nanobiology, Shanghai University, Shanghai 201800 (China); Shanghai Applied Radiation Institute, Shanghai University, Shanghai 201800 (China); Fang, Yaoguo [Institute of Nanochemistry and Nanobiology, Shanghai University, Shanghai 201800 (China); Peng, Liwei; Wu, Minghong [Shanghai Applied Radiation Institute, Shanghai University, Shanghai 201800 (China); Pan, Dengyu

2010-10-15

Rose-like ZnO nanostructures were prepared by a low-temperature solution route with assistance of ethylenediaminetetraacetic acid disodium (EDTA-2Na). The morphology of ZnO nanostructures was found to change from nanowire arrays to rose- and tower-like architectures with increasing the molar ratio of EDTA-2Na/Zn{sup 2+}. Also, the shape evolution of ZnO nanostructures with time was observed from flat nanosheets to wrinkled nanosheets and to rose-like nanostructures. EDTA-2Na as a strong complexing agent was found to play a key role in the shape evolution. Photoluminescence spectra show that the rose-like ZnO architectures have more defects than the nanowire arrays. (copyright 2010 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Structural transformations of TiO{sub 2} films with deposition temperature and electrical properties of nanostructure n-TiO{sub 2}/p-Si heterojunction diode

Energy Technology Data Exchange (ETDEWEB)

Aksoy, Seval; Caglar, Yasemin, E-mail: yasemincaglar@anadolu.edu.tr

2014-11-15

Highlights: • Titanium oxide (TiO{sub 2}) films have been deposited on p-Si substrates by sol gel spin coating technique. • The effect of deposition temperatures on structural and morphological properties of TiO{sub 2} films. • The electrical parameters of nanostructure n-TiO{sub 2}/p-Si heterojunction diode such as n, R{sub s} and ϕ{sub b} were investigated. - Abstract: Titanium oxide (TiO{sub 2}) films have been deposited on p-Si substrates by sol–gel method using spin coating technique. Structural and morphological properties were studied as a function of deposition temperatures by X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM). The deposition temperatures were chosen from 700 °C to 1100 °C. Crystallization of the anatase phase and its transformation to the rutile phase were observed at 700 °C and 800 °C, respectively. The fabrication of nanostructure n-TiO{sub 2}/p-Si heterojunction diode was formed by using T7 film deposited at 700 °C. The electrical parameters such as barrier height (ϕ{sub b}) and ideality factor (n) of nanostructure n-TiO{sub 2}/p-Si heterojunction diode were investigated by using I–V measurements and observed to be 0.58 eV and 5.39, respectively. Also, the values of ϕ{sub b} and series resistance (R{sub s}) were determined by using Cheung’s and Norde methods. From the I–V measurements taken at room temperature, the space charge limited (SCLC) mechanism was determined at the low voltage region. The obtained results showed that n-TiO{sub 2}/p-Si heterojunction diode is a good candidate for the applications of semiconductor electronic devices.

Performance of the BioPlex 2200 HIV Ag-Ab assay for identifying acute HIV infection.

Science.gov (United States)

Eshleman, Susan H; Piwowar-Manning, Estelle; Sivay, Mariya V; Debevec, Barbara; Veater, Stephanie; McKinstry, Laura; Bekker, Linda-Gail; Mannheimer, Sharon; Grant, Robert M; Chesney, Margaret A; Coates, Thomas J; Koblin, Beryl A; Fogel, Jessica M

Assays that detect HIV antigen (Ag) and antibody (Ab) can be used to screen for HIV infection. To compare the performance of the BioPlex 2200 HIV Ag-Ab assay and two other Ag/Ab combination assays for detection of acute HIV infection. Samples were obtained from 24 individuals (18 from the US, 6 from South Africa); these individuals were classified as having acute infection based on the following criteria: positive qualitative RNA assay; two negative rapid tests; negative discriminatory test. The samples were tested with the BioPlex assay, the ARCHITECT HIV Ag/Ab Combo test, the Bio-Rad GS HIV Combo Ag-Ab EIA test, and a viral load assay. Twelve (50.0%) of 24 samples had RNA detected only ( > 40 to 13,476 copies/mL). Ten (43.5%) samples had reactive results with all three Ag/Ab assays, one sample was reactive with the ARCHITECT and Bio-Rad assays, and one sample was reactive with the Bio-Rad and BioPlex assays. The 11 samples that were reactive with the BioPlex assay had viral loads from 83,010 to >750,000 copies/mL; 9/11 samples were classified as Ag positive/Ab negative by the BioPlex assay. Detection of acute HIV infection was similar for the BioPlex assay and two other Ag/Ab assays. All three tests were less sensitive than a qualitative RNA assay and only detected HIV Ag when the viral load was high. The BioPlex assay detected acute infection in about half of the cases, and identified most of those infections as Ag positive/Ab negative. Copyright © 2018 Elsevier B.V. All rights reserved.

Factors related to non-recovery from whiplash. The Nord-Trøndelag Health Study (HUNT).

Science.gov (United States)

Myrtveit, Solbjørg Makalani; Skogen, Jens Christoffer; Petrie, Keith J; Wilhelmsen, Ingvard; Wenzel, Hanne Gro; Sivertsen, Børge

2014-06-01

Whiplash injuries show a variable prognosis which is difficult to predict. Most individuals experiencing whiplash injuries rapidly recover but a significant proportion develop chronic symptoms and ongoing disability. By employing longitudinal data, we investigated how psychological and physical symptoms, self-rated health, use of health services and medications, health behavior and demographic factors predict recovery from whiplash. Data from two waves of a large, Norwegian, population-based study (The Nord-Trøndelag Health Study: HUNT2 and HUNT3) were used. Individuals reporting whiplash in HUNT2 (baseline) were identified in HUNT3 11 years later. The characteristics of individuals still suffering from whiplash in HUNT3 were compared with the characteristics of individuals who had recovered using Pearson's chi-squared test, independent sample t-tests and logistic regression. At follow-up, 31.6 % of those reporting whiplash at baseline had not recovered. These individuals (n = 199) reported worse health at baseline than recovered individuals (n = 431); they reported poorer self-rated health (odds ratio [OR] = 3.12; 95 % confidence interval [CI], 2.20-4.43), more symptoms of anxiety (OR = 1.70; 95 % CI, 1.15-2.50), more diffuse somatic symptoms (OR = 2.38; 95 % CI, 1.61-3.51) and more musculoskeletal symptoms (OR = 1.21; 95 % CI, 1.13-1.29). Individuals still suffering from whiplash also visited more health practitioners at baseline (OR = 1.18; 95 % CI, 1.06-1.32) and used more medications (OR = 1.24; 95 % CI, 1.09-1.40). Poor self-rated health seems to be a strong risk factor for whiplash injuries becoming chronic. Diffuse somatic symptoms, musculoskeletal symptoms and symptoms of anxiety at baseline are important prognostic risk factors. Knowledge of these maintaining risk factors enables identification of individuals at risk of non-recovery, facilitating adequate treatment for this vulnerable group.

Flexible MgO Barrier Magnetic Tunnel Junctions.

Science.gov (United States)

Loong, Li Ming; Lee, Wonho; Qiu, Xuepeng; Yang, Ping; Kawai, Hiroyo; Saeys, Mark; Ahn, Jong-Hyun; Yang, Hyunsoo

2016-07-01

Flexible MgO barrier magnetic tunnel junction (MTJ) devices are fabricated using a transfer printing process. The flexible MTJ devices yield significantly enhanced tunneling magnetoresistance of ≈300% and improved abruptness of switching, as residual strain in the MTJ structure is released during the transfer process. This approach could be useful for flexible electronic systems that require high-performance memory components. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Room-temperature synthesis and characterization of porous CeO2 thin films

International Nuclear Information System (INIS)

Chu, Dewei; Masuda, Yoshitake; Ohji, Tatsuki; Kato, Kazumi

2012-01-01

CeO 2 thin films with hexagonal-shaped pores were successfully prepared by a facile electrodeposition at room temperature combined with an etching process. By using electrodeposited ZnO nanorods as a soft template, the morphology, and microstructure of the CeO 2 could be controlled. TEM observation indicated that as-prepared CeO 2 film is composed of nanocrystals with average size of several nanometers, while XPS analysis showed the coexistence of Ce 3+ and Ce 4+ in the film. The photoluminescence properties of CeO 2 films were measured, which showed much higher sensitivity compared to bare substrate. (Copyright copyright 2012 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Observation of Zn vacancies in ZnO grown by chemical vapor transport

Energy Technology Data Exchange (ETDEWEB)

Tuomisto, F.; Saarinen, K. [Laboratory of Physics, Helsinki University of Technology, P.O. Box 1100, 02015 TKK (Finland); Grasza, K.; Mycielski, A. [Institute of Physics, Polish Academy of Sciences, Lotnikow 32/46, 02-668 Warsaw (Poland)

2006-03-15

We have used positron annihilation spectroscopy to study the vacancy defects in ZnO crystals grown by both the conventional and contactless chemical vapor transport (CVT and CCVT). Our results show that Zn vacancies or Zn vacancy related defects are present in as-grown ZnO, irrespective of the growth method. Zn vacancies are observed in CVT-grown undoped ZnO and (Zn,Mn)O. The Zn vacancies present in undoped CCVT-ZnO are the dominant negatively charged point defect in the material. Doping the material with As introduces also Zn vacancy-related defect complexes with larger open volume. (copyright 2006 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Co{sub 3}O{sub 4} nanowire rate at MnO{sub 2} ultrathin nanosheet core/shell arrays: a new class of high-performance pseudocapacitive materials

Energy Technology Data Exchange (ETDEWEB)

Liu, Jinping [Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371 (Singapore); Institute of Nanoscience and Nanotechnology, Department of Physics, Huazhong Normal University, Wuhan 430079, Hubei (China); Jiang, Jian [Institute of Nanoscience and Nanotechnology, Department of Physics, Huazhong Normal University, Wuhan 430079, Hubei (China); Cheng, Chuanwei; Li, Hongxing; Fan, Hong Jin [Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371 (Singapore); Zhang, Jixuan; Gong, Hao [Department of Materials Science and Engineering, National University of Singapore, Singapore 117576 (Singapore)

2011-05-10

A smart hybrid nanowire array consisting of Co{sub 3}O{sub 4} porous nanowire core and a MnO{sub 2} ultrathin nanosheet shell is fabricated using a general 3D interfacial carbon-assisted hydrothermal method. The array exhibits a high capacitance with good cycle performance and remarkable rate capability that is ranging among the best reported to date for hybrid metal oxide systems in the absence of a conducting matrix. (Copyright copyright 2011 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

SnO2 anode surface passivation by atomic layer deposited HfO2 improves li-ion battery performance

KAUST Repository

Yesibolati, Nulati

2014-03-14

For the first time, it is demonstrated that nanoscale HfO2 surface passivation layers formed by atomic layer deposition (ALD) significantly improve the performance of Li ion batteries with SnO2-based anodes. Specifically, the measured battery capacity at a current density of 150 mAg -1 after 100 cycles is 548 and 853 mAhg-1 for the uncoated and HfO2-coated anodes, respectively. Material analysis reveals that the HfO2 layers are amorphous in nature and conformably coat the SnO2-based anodes. In addition, the analysis reveals that ALD HfO2 not only protects the SnO2-based anodes from irreversible reactions with the electrolyte and buffers its volume change, but also chemically interacts with the SnO2 anodes to increase battery capacity, despite the fact that HfO2 is itself electrochemically inactive. The amorphous nature of HfO2 is an important factor in explaining its behavior, as it still allows sufficient Li diffusion for an efficient anode lithiation/delithiation process to occur, leading to higher battery capacity. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

KLINO - climatology and prognosis of climate-induced changes in hydrographic parameters of the North Sea and Baltic Sea. Final report; KLINO - Klimatologie und Prognose klimainduzierter Aenderungen hydrographischer Groessen in Nord- und Ostsee. Abschlussbericht

Energy Technology Data Exchange (ETDEWEB)

NONE

2000-04-01

The marine climate of the North Sea and Baltic Sea was simulated and analyzed with the aid of meteorological and oceanographic models. The KLINO project is a first step towards climate impact research as sensitivity studies of the models permit preliminary statements on the effects of potential changes of marine climate. The simulations covered several decades. The models used were: WAM for calculating the swell of the Atlantic and the two marginal seas; HAMSOM for climate-induced variations of the hydrographic parameters of the NOrth Sea and Baltic Sea; HAMSOM and REMO for interactive coupling between ocean and atmosphere; HYDROMOD for extreme and normal conditions in the offshore region. [German] Im Projekt KLINO wurde das derzeitige marine Klima (Wasserstaende und mittlerer Meeresspiegel, Seegang, Stroemungen und Schichtung) von Nord- und Ostsee in Kontrollexperimenten mit Hilfe meteorologischer und ozeanographischer Modelle simuliert und nach vollzogen. Das KLINO Projekt ist in die Arbeiten zur Klima-Regionalisierung bzw. als ein erster Schritt zur Klima-Impaktforschung einzustufen, da Sensitivitaetsstudien der Modelle bereits vorsichtige Aussagen ueber die Folgen moeglicher Aenderungen des marinen Klimas zulassen. Das WAM-Modell lieferte eine Klimatologie des Seeganges fuer den Atlantik und die beiden Randmeere. Die klimainduzierten Schwankungen der hydrographischen Parameter in Nord- und Ostsee wurden mit Hilfe des HAMSOM untersucht; eine interaktive Kopplung zwischen Ozean und Atmosphaere erfolgte mit den Regionalmodellen HAMSOM und REMO. Die Simulationen deckten hinreichend lange Zeitraeume (Dekaden) ab und wurden mit beobachteten bzw. aus meteorologischen Re-Analysen abgeleiteten Fluessen von Impuls, Waerme und Frischwasser angetrieben. Zur Initialisierung und Validierung der ozeanographischen Modelle wurden umfangreiche Beobachtungsdatensaetze fuer die Parameter Temperatur, Salzgehalt, Eis, Seegang und Oberflaechenauslenkung zusammengestellt

L'Amérique du Sud ou l'émergence d'un nouveau théâtre des ...

African Journals Online (AJOL)

24 juin 2015 ... division du travail, ou encore les politiques restrictives au Nord. En Europe .... de recruter des candidats. Ceux-là œuvrent ..... stratégie d'inclusion au marché international, au moment où les dictatures s'effacent pour laisser la ...

A Chemoenzymatic Histology Method for O-GlcNAc Detection.

Science.gov (United States)

Aguilar, Aime Lopez; Hou, Xiaomeng; Wen, Liuqing; Wang, Peng G; Wu, Peng

2017-12-14

Modification of nuclear and cytoplasmic proteins by the addition or removal of O-GlcNAc dynamically impacts multiple biological processes. Here, we present the development of a chemoenzymatic histology method for the detection of O-GlcNAc in tissue specimens. We applied this method to screen murine organs, uncovering specific O-GlcNAc distribution patterns in different tissue structures. We then utilized our histology method for O-GlcNAc detection in human brain specimens from healthy donors and donors with Alzheimer's disease and found higher levels of O-GlcNAc in specimens from healthy donors. We also performed an analysis using a multiple cancer tissue array, uncovering different O-GlcNAc levels between healthy and cancerous tissues, as well as different O-GlcNAc cellular distributions within certain tissue specimens. This chemoenzymatic histology method therefore holds great potential for revealing the biology of O-GlcNAc in physiopathological processes. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

Epitaxial growth and optical investigations of ZnTeO alloys

International Nuclear Information System (INIS)

Nabetani, Y.; Okuno, T.; Aoki, K.; Kato, T.; Matsumoto, T.; Hirai, T.

2006-01-01

We have grown zincblende-structured ZnTeO alloy semiconductors on GaAs substrates by molecular beam epitaxy using RF-excited O. O concentrations measured by secondary ion mass spectroscopy were found to increase with the increase of O 2 flow rate supplied during the growth, while the change of lattice constant measured by X-ray diffraction does not follow Vegard's law. It is considered that the O atoms are incorporated not only into group-VI sites but also as interstitials. Formation of other compounds such as ZnTeO 3 , Zn 2 Te 3 O 8 , and TeO 2 was not detected. Optical reflectance spectroscopy revealed the increase of the band-gap energy with O concentration that can be interpreted as the repulsive interaction between the energy states originated in the localized states of O and the conduction-band edge of host ZnTe. (copyright 2006 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (Abstract Copyright [2006], Wiley Periodicals, Inc.)

Esporotricose: a evolução e os desafios de uma epidemia Sporotrichosis: development and challenges of an epidemic

Directory of Open Access Journals (Sweden)

Monica Bastos de Lima Barros

2010-06-01

Full Text Available A ocorrência de esporotricose em animais e sua transmissão ao ser humano têm sido relatadas em diversos países. Contudo, em nenhum lugar a doença assumiu proporções epidêmicas, envolvendo pessoas e gatos, como no Estado do Rio de Janeiro, Brasil. Dados preliminares apontam para aproximadamente 2200 casos humanos diagnosticados até dezembro de 2009. No Laboratório de Pesquisa Clínica em Dermatozoonoses em Animais Domésticos foram atendidos, até essa data, aproximadamente 3244 gatos. A distribuição geográfica mostra concentração de casos na região metropolitana da Cidade do Rio de Janeiro. O grupo mais acometido são as mulheres de baixo nível socioeconômico, com idade de 40 a 59 anos, que realizam atividades domésticas. O itraconazol foi a droga de primeira escolha para o tratamento. Embora a esporotricose normalmente não acometa órgãos além da pele, mucosa e subcutâneo, tem um custo social indireto - pelo absenteísmo ao trabalho, pelo sofrimento durante a doença ativa e pelo aspecto desagradável das lesões cicatriciais. Por sua vez, nos gatos, é comum o acometimento sistêmico, levando a formas graves de difícil tratamento e evolução para o óbito. Considerando que o tempo de tratamento dos animais é maior do que nos seres humanos, tratar gatos com esporotricose tem sido um dos maiores entraves e permanece como o grande desafio para o controle da epidemia.In the state of Rio de Janeiro, Brazil, sporotrichosis reached epidemic levels, involving humans and cats. Preliminary data indicate that approximately 2200 human cases were diagnosed between 1998 and December of 2009, and 3244 cats were treated. The geographic distribution of cases reveals a concentration in the City of Rio de Janeiro metropolitan area. The disease affects mostly women of a low socioeconomic status, aged 40 to 55 years, who work as housekeepers. Itraconazole has been the drug of choice for treatment. Although sporotrichosis does not usually

Analyses of the As doping of SiO{sub 2}/Si/SiO{sub 2} nanostructures

Energy Technology Data Exchange (ETDEWEB)

Ruffino, Francesco; Miritello, Maria [CNR-IMM MATIS, via S. Sofia 64, 95123 Catania (Italy); Tomasello, Mario Vincenzo [Scuola Superiore di Catania, via San Nullo 5/i, 95123 Catania (Italy); De Bastiani, Riccardo; Grimaldi, Maria Grazia [Dipartimento di Fisica ed Astronomia, Universita di Catania, via S. Sofia 64, 95123 Catania (Italy); CNR-IMM MATIS, via S. Sofia 64, 95123 Catania (Italy); Nicotra, Giuseppe; Spinella, Corrado [Consiglio Nazionale delle Ricerche-Istituto per la Microelettronica e Microsistemi (CNR-IMM), VIII Strada 5, 95121 Catania (Italy)

2011-03-15

We illustrate the behaviour of As when it is confined, by the implantation technique, in a SiO{sub 2}(70nm)/Si(30nm)/SiO{sub 2}(70nm) multilayer and its spatial redistribution when annealing processes are performed. By Rutherford backscattering spectrometry and Z-contrast transmission electron microscopy we found an As accumulation at the Si/SiO{sub 2} interfaces and at the Si grain boundaries with no segregation of the As in the Si layer. Such an effect is in agreement with a model that assumes a traps distribution in the Si in the first 2-3 nm above the SiO{sub 2}/Si interfaces and along the Si grain boundaries. The traps concentration at the Si/SiO{sub 2} interfaces was estimated in 10{sup 14} traps/cm{sup 2}. The outlined results can open perspectives on the doping properties of As in Si nanocrystals, whose applications in nanoelectronics and optoelectronics are widely investigated (copyright 2011 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Behaviour of HTGR coated fuel particles at high-temperature tests

International Nuclear Information System (INIS)

Chernikov, A.S.; Lyutikov, R.A.; Kurbakov, S.D.; Repnikov, V.M.; Khromonozhkin, V.V.; Soloviyov, G.I.

1990-01-01

At the temperature range 1200-2600 deg. C prereactor tests of TRISO fuel particles on the base of UO 2 , UC x O y and UO 2 +2Al 2 O 3 . SiO 2 kernels, and also fuel particle models with ZrC kernels were performed. Isothermal annealings carried out at temperatures of 1400-2600 deg. C, thermogradient ones at 1200-2200 deg. C (Δ T = 200-1200 deg. C/cm). It is shown that at heating to 2200 deg. C integrity of fuel particles is limited by different thermal expansion of PyC and SiC coatings, and also by thermal dissociation of SiC. At higher temperatures the failure is caused by development of high pressures within weakened fuel particles. It is found that uranium migration from alloyed fuel (UC x O y , UO 2 +2Al 2 O 3 .SiO 2 ) in the process of annealing is higher than that from UO 2 . (author)

Hierarchical NiCo2 O4 nanosheets grown on Ni nanofoam as high-performance electrodes for supercapacitors.

Science.gov (United States)

Gao, Guoxin; Wu, Hao Bin; Ding, Shujiang; Liu, Li-Min; Lou, Xiong Wen David

2015-02-18

A high-performance electrode for supercapacitors is designed and synthesized by growing electroactive NiCo2 O4 nanosheets on conductive Ni nanofoam. Because of the structural advantages, the as-prepared Ni@NiCo2 O4 hybrid nanostructure exhibits significantly improved electrochemical performance with high capacitance, excellent rate capability, and good cycling stability. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Room-temperature synthesis and characterization of porous CeO{sub 2} thin films

Energy Technology Data Exchange (ETDEWEB)

Chu, Dewei; Masuda, Yoshitake; Ohji, Tatsuki; Kato, Kazumi [National Institute of Advanced Industrial Science and Technology (AIST), Anagahora, Shimoshidami, Moriyama-ku, Nagoya (Japan)

2012-01-15

CeO{sub 2} thin films with hexagonal-shaped pores were successfully prepared by a facile electrodeposition at room temperature combined with an etching process. By using electrodeposited ZnO nanorods as a soft template, the morphology, and microstructure of the CeO{sub 2} could be controlled. TEM observation indicated that as-prepared CeO{sub 2} film is composed of nanocrystals with average size of several nanometers, while XPS analysis showed the coexistence of Ce{sup 3+} and Ce{sup 4+} in the film. The photoluminescence properties of CeO{sub 2} films were measured, which showed much higher sensitivity compared to bare substrate. (Copyright copyright 2012 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Examens externes des programmes (2012) | CRDI - Centre de ...

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

24 juin 2016 ... Maroc : La valeur de l'eau. Le Maroc, au nord de l'Afrique, est un territoire en partie aride, où les pluies sont rares, mais où l'agriculture prospère malgré tout. Voir davantageMaroc : La valeur de l'eau · Ce que nous faisons · Financement · Ressources · À propos du CRDI. Savoir. Innovation. Solutions.

Miljøvurdering af tørring, forgasning og udvinding af fosfor fra spildevandsslam

DEFF Research Database (Denmark)

Sørensen, Birgitte Lilholt; Leinikka Dall, Ole; Habib, Komal

The Danish waste treatment plant for hazardous waste Kommunekemi/Nord aims to recover phosphorus from waste water sludge. The presented LCA-analysis indicates that environmental impacts by phosphorous recovery in an energy efficient process are at the same level or lower than through the re-use o...

Optical properties of ZnO, Zn{sub 0.99}Mn{sub 0.01}O nanopowders

Energy Technology Data Exchange (ETDEWEB)

Sokolov, V.I.; Yermakov, A.Ye.; Uimin, M.A.; Mysik, A.A.; Gruzdev, N.B. [Institute of Metal Physics UD RAS, S. Kovalevskaya Str. 18, 620041 Yekaterinburg (Russian Federation); Pustovarov, V.A. [Ural State Technical University, Mira Str. 19, 620002 Yekaterinburg (Russian Federation); Surikov, V.T. [Institute of Chemistry of Solid State, UD RAS, Pervomayskaya Str. 91, 620041 Yekaterinburg (Russian Federation)

2010-06-15

The photoluminescence and photoluminescence excitation spectra of Zn{sub 0.99}Mn{sub 0.01}O nanopowders are presented in this paper. Detected peaks at energies {Dirac_h}{omega} higher than the energy gap in the photoluminescence excitation spectra allow us to assume that the Zhang-Rice-like states in forbidden gap due to the strong exchange coupling between 3d localized spin and valence band holes are related with valence band states perturbed by strong p-d hybridization (copyright 2010 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Developpement D'un Modele Climatique Regional: Fizr Simulation des Conditions de Janvier de la Cote Ouest Nord Americaine

Science.gov (United States)

Goyette, Stephane

1995-11-01

Le sujet de cette these concerne la modelisation numerique du climat regional. L'objectif principal de l'exercice est de developper un modele climatique regional ayant les capacites de simuler des phenomenes de meso-echelle spatiale. Notre domaine d'etude se situe sur la Cote Ouest nord americaine. Ce dernier a retenu notre attention a cause de la complexite du relief et de son controle sur le climat. Les raisons qui motivent cette etude sont multiples: d'une part, nous ne pouvons pas augmenter, en pratique, la faible resolution spatiale des modeles de la circulation generale de l'atmosphere (MCG) sans augmenter a outrance les couts d'integration et, d'autre part, la gestion de l'environnement exige de plus en plus de donnees climatiques regionales determinees avec une meilleure resolution spatiale. Jusqu'alors, les MCG constituaient les modeles les plus estimes pour leurs aptitudes a simuler le climat ainsi que les changements climatiques mondiaux. Toutefois, les phenomenes climatiques de fine echelle echappent encore aux MCG a cause de leur faible resolution spatiale. De plus, les repercussions socio-economiques des modifications possibles des climats sont etroitement liees a des phenomenes imperceptibles par les MCG actuels. Afin de circonvenir certains problemes inherents a la resolution, une approche pratique vise a prendre un domaine spatial limite d'un MCG et a y imbriquer un autre modele numerique possedant, lui, un maillage de haute resolution spatiale. Ce processus d'imbrication implique alors une nouvelle simulation numerique. Cette "retro-simulation" est guidee dans le domaine restreint a partir de pieces d'informations fournies par le MCG et forcee par des mecanismes pris en charge uniquement par le modele imbrique. Ainsi, afin de raffiner la precision spatiale des previsions climatiques de grande echelle, nous developpons ici un modele numerique appele FIZR, permettant d'obtenir de l'information climatique regionale valide a la fine echelle spatiale

Chemical and isotopic tracing of underground water in relation with leaching of mine spoils, Nord-Pas-de-Calais Coal Basin (France)

International Nuclear Information System (INIS)

Denimal, S.; Tribovillard, N.; Meilliez, F.; Barbecot, F.; Dever, L.

2001-01-01

Coal mining activity in the Nord-Pas-de-Calais region (Northern France) has generated many mine spoils. The oxidation of the pyrite content of such coal shales and their leaching can be a source of sulfate pollution for the underlying chalk aquifer, i.e. the main drinking water resource of the region. Two sites of study have been retained: one in the free water table zone and the other in the confined water table zone. Samples from both mine spoils have been analyzed with respect to their carbon and sulfur content and a superficial leaching of these elements has been evidenced. Water has been sampled in piezometers and boreholes close to the mine spoils and also along natural flux lines. The use of sulfur isotopes as markers of the different sulfate sources has confirmed the spoils source but has permitted to identify another source in the second site which is the Tertiary gypsum-bearing Ostricourt sands. This study has shown also that in the confined water table zone, part of the exported sulfates is reduced. This bacterial reduction of sulfates is due to a joint leaching of both carbon and sulfur in the mine spoils. A self-purification phenomenon occurs when the chalk aquifer is confined beneath the Cenozoic cover. (J.S.)

B_2S_2O_9. A boron sulfate with phyllosilicate topology

International Nuclear Information System (INIS)

Logemann, Christian; Wickleder, Mathias S.

2013-01-01

The condensation of [BO_4] and [SO_4] tetrahedra in the first binary boron sulfate B_2S_2O_9, leads to a structure with typical layered phyllosilicate topology. The compound is obtained from the hydrolysis of B(OH)_3 and HSO_3Cl. (Copyright copyright 2013 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Optimizing TiO2 nanotube top geometry for use in dye-sensitized solar cells.

Science.gov (United States)

Mir, Nooshin; Lee, Kiyoung; Paramasivam, Indhumati; Schmuki, Patrik

2012-09-17

Recombination dynamics: For TiO(2) nanotube-based dye-sensitized solar cells, the efficiency can be drastically enhanced by a synergetic effect that occurs when using nanowire-ended nanotubes in combination with an adequate nanoparticle decoration (see figure). Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Electrospark deposition of Al2O3–TiB2/Ni composite-phase surface coatings on Cu–Cr–Zr alloy electrodes

Directory of Open Access Journals (Sweden)

Ping Luo

2015-03-01

Full Text Available To improve electrode life during the resistance spot welding of galvanized steel plates, an Al2O3–TiB2 composite coating was synthesized on the surfaces of spot-welding electrodes through an electrospark deposition process. The microstructure, elemental composition, phase structure, and mechanical properties of the coating were characterized using scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction analysis, and microhardness testing. It was found that extensive cracking occurred in the monolithic Al2O3–TiB2 coating and at the coating–electrode interface. When the Al2O3–TiB2 coating was deposited on electrodes precoated with Ni, the number of defects decreased significantly. Further, delamination did not occur, and fewer cracks were formed. The average hardness of the multilayered Al2O3–TiB2/Ni coating was approximately 2200 HV and higher than that of the monolithic Al2O3–TiB2 coating (1100 HV.

Amphiphilic polymer promoted assembly of macroporous graphene/SnO2 frameworks with tunable porosity for high-performance lithium storage.

Science.gov (United States)

Huang, Yanshan; Wu, Dongqing; Wang, Jinzuan; Han, Sheng; Lv, Lu; Zhang, Fan; Feng, Xinliang

2014-06-12

3D macroporous graphene/SnO2 frameworks (MGTFs) are fabricated by amphiphilic polymer-promoted assembly method, which exhibit controllable macroporous structure and outstanding lithium storage performance. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Whiter, brighter, and more stable cellulose paper coated with TiO2 /SiO2 core/shell nanoparticles using a layer-by-layer approach.

Science.gov (United States)

Cheng, Fei; Lorch, Mark; Sajedin, Seyed Mani; Kelly, Stephen M; Kornherr, Andreas

2013-08-01

To inhibit the photocatalytic degradation of organic material supports induced by small titania (TiO2 ) nanoparticles, four kinds of TiO2 nanoparticles, that is, commercial P25-TiO2 , commercial rutile phase TiO2 , rutile TiO2 nanorods and rutile TiO2 spheres, prepared from TiCl4 , were coated with a thin, but dense, coating of silica (SiO2 ) using a conventional sol-gel technique to form TiO2 /SiO2 core/shell nanoparticles. These core/shell particles were deposited and fixed as a very thin coating onto the surface of cellulose paper samples by a wet-chemistry polyelectrolyte layer-by-layer approach. The TiO2 /SiO2 nanocoated paper samples exhibit higher whiteness and brightness and greater stability to UV-bleaching than comparable samples of blank paper. There are many potential applications for this green chemistry approach to protect cellulosic fibres from UV-bleaching in sunlight and to improve their whiteness and brightness. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Luminescence properties of Ag-, Ga-doped ZnO and ZnO-ZnS thin films

Energy Technology Data Exchange (ETDEWEB)

Kushnirenko, V.I.; Khomchenko, V.S.; Zavyalova, L.V. [V. Lashkarev Institute of Semiconductor Physics, NAS of Ukraine, Pr. Nauki 45, 03028 Kiev (Ukraine); Zashivailo, T.V. [National Technical University of Ukraine ' ' KPI' ' , Pr. Pobedy 37, 03056 Kiev (Ukraine)

2012-08-15

Thin films of ZnS were grown by metal-organic chemical vapor deposition (MOCVD) method under atmospheric pressure onto glass substrates. ZnO-ZnS:[Ag, Ga] and ZnO:[Ag, Ga] thin films were prepared by oxidation and Ag, Ga doping of ZnS films at temperatures of 700-775 C for 0.5-1 h. Crystalline quality and luminescent properties were investigated using X-ray diffraction (XRD), atomic force microscopy (AFM), and photoluminescence. It is found that the doped films have a polycrystalline structure without preferred orientation and consist of small grains gathered into conglomerates. The shape of photoluminescence (PL) spectra of the films depends strongly on the preparation conditions. The ZnO-ZnS:[Ag, Ga] films exhibited the blue and green emission connected with the presence of silver and oxygen, respectively. The ZnO:[Ag, Ga] films revealed the white emission originated from different defect-related transitions. The possible origin of radiative centers is discussed (copyright 2012 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Galite

OpenAIRE

Soumille, P.

2012-01-01

La Galite est une île située par 37°31’ de latitude Nord et 8’55’ de longitude Est, au large de la côte septentrionale de la Tunisie, à 25 milles marins (46 kilomètres) au Nord du Cap Negro, à 33 milles (61 kilomètres) au Nord/Nord-Est de Tabarka et à 50 milles (92 kilomètres) au Nord/Nord-Ouest de la rade de Bizerte. Les Instructions nautiques sur les côtes de Tunisie, datant de 1890, nous décrivent ainsi l’île : « C’est un gros massif de terre escarpé et sans plage de trois milles de longue...

Gender differences in psychosocial functioning of adolescents with symptoms of anxiety and depression: longitudinal findings from the Nord-Trøndelag Health Study.

Science.gov (United States)

Derdikman-Eiron, Ruth; Indredavik, Marit S; Bakken, Inger Johanne; Bratberg, Grete H; Hjemdal, Odin; Colton, Matthew

2012-11-01

To explore longitudinally gender differences in the associations between psychosocial functioning, subjective well-being and self-esteem among adolescents with and without symptoms of anxiety and depression. Data were obtained from a major population-based Norwegian study, the Nord-Trøndelag Health Study, in which 1,092 boys and 1,262 girls (86% of all invited) completed an extensive self-report questionnaire at baseline (mean age 14.4 years) and at follow-up (mean age 18.4 years). Gender was a moderator variable in the associations between symptoms of anxiety and depression and impairment, meaning that boys' functioning was impaired to a larger extent than girls' functioning. A statistically significant interaction effect between gender and symptoms of anxiety and depression was found at follow-up in terms of subjective well-being (p self-esteem (p self-esteem than boys who had no symptoms at both time points. No similar differences were found among the girls. Previous and ongoing symptoms of anxiety and depression had more negative consequences for boys than for girls. These findings may contribute to improved assessment and intervention methods tailored differently for each gender.

A vida por um trabalho: população estrangeira e ilegal na Espanha

Directory of Open Access Journals (Sweden)

Márcia Siqueira de Carvalho

2008-04-01

Full Text Available Os dados do recenseamento revelaram um perfil da população estrangeira na Espanha, confirmaram algumas impressões e desfizeram outras. Eles refletem também a desigualdade na distribuição dos aumentos demográficos no território daquele país, com o destaque para a costa mediterrânea, a região da Catalunha (Nordeste do país e na cidade de Madri e arredores, enquanto houve perda populacional no interior e na região norte. O peso da população estrangeira na população total da Espanha cresceu de 7,0% em 2004 para 8,5% em 2005. Apesar da dificuldade na análise dos dados populacionais em relação aos estrangeiros legalizados e os ilegais, essa tendência não será revertida tão cedo. Setores da economia espanhola dependem da imigração, legal ou não. A Caixa Catalunya, entidade financeira desta comunidade autônoma, estimou que 50% do crescimento da PIB catalão nos últimos anos deve-se ao fenômeno da imigração.Les données du recensement ont révélé un profil de la population étrangère en Espagne, ont confirmé quelques impressions et en ont défait autres. Ils reflètent aussi l'inégalité dans la distribution des augmentations démographiques dans le territoire de ce pays, avec la prééminence de la côte méditerranéenne, de la Catalogne (Nord-est du pays et de la ville de Madrid et de sa banlieue, alors que l'intérieur et la région nord ont vu leur population décliner. Le poids de la population étrangère dans la population totale de l'Espagne a grandi de 7,0% dans 2004 à 8,5% en 2005. Malgré la difficulté de l'analyse des données démographiques concernant les étrangers légalisés et les illégaux, cette tendance ne se retournera pas de sitôt. Des secteurs de l'économie espagnole dépendent de l'immigration, légale ou non. La Caixa Catalunya, organisme financier de cette communauté indépendante, a estimé que 50% de la croissance du PIB catalan dans les dernières années est due au phénomène de l

Passivation of ZnO Nanowire Guests and 3D Inverse Opal Host Photoanodes for Dye-Sensitized Solar Cells

KAUST Repository

Labouchere, Philippe

2014-04-23

A hierarchical host-guest nanostructured photoanode is reported for dye-sensitized solar cells. It is composed of ZnO nanowires grown in situ into the macropores of a 3D ZnO inverse opal structure, which acts both as a seed layer and as a conductive backbone host. Using a combination of self-assembly, hydrothermal or electrodeposition of single crystalline ZnO nanowires and TiO2 passivation, a novel photoanode with scattering capability for optimal light harvesting is fabricated. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Electrical characterization of ZnO nanorods

Energy Technology Data Exchange (ETDEWEB)

Schlenker, E.; Bakin, A.; Postels, B.; Mofor, A.C.; Wehmann, H.H.; Waag, A. [Institute of Semiconductor Technology, Technical University Braunschweig, Hans-Sommer-Strasse 66, 38106 Braunschweig (Germany); Weimann, T.; Hinze, P. [Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, 38116 Braunschweig (Germany)

2007-05-15

Zinc oxide (ZnO) nanorods were grown by a wet chemical approach and by vapor phase transport. To explore the electrical properties of individual nanostructures current-voltage (I-V) characteristics were obtained by using an atomic force microscope (AFM) with a conductive tip or by detaching the nanorods from the growth substrate, transferring them to an isolating substrate and contacting them with evaporated Ti/Au electrodes patterned by electron-beam lithography. The AFM-approach only yields a Schottky diode behavior, while the Ti/Au forms ohmic contacts to the ZnO. For the latter method the obtained I-V curves reveal a resistivity of the nanorods in the order of 10{sup -5} {omega} cm which is unusually low for undoped ZnO. We therefore assume the existence of a highly conductive surface channel. (copyright 2007 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Multifunctional polypyrrole@fe3o4 nanoparticles for dual-modal imaging and in vivo photothermal cancer therapy

KAUST Repository

Tian, Qiwei; Wang, Qian; Yao, Kexin; Teng, Baiyang; Zhang, Jizhe; Yang, Shiping; Han, Yu

2013-01-01

Magnetic Fe3O4 crystals are produced in situ on preformed polypyrrole (PPY) nanoparticles by rationally converting the residual Fe species in the synthetic system. The obtained PPY@Fe3O4 composite nanoparticles exhibit good photostability and biocompatibility, and they can be used as multifunctional probes for MRI, thermal imaging, and photothermal ablation of cancer cells. © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Multifunctional polypyrrole@fe3o4 nanoparticles for dual-modal imaging and in vivo photothermal cancer therapy

KAUST Repository

Tian, Qiwei

2013-11-27

Magnetic Fe3O4 crystals are produced in situ on preformed polypyrrole (PPY) nanoparticles by rationally converting the residual Fe species in the synthetic system. The obtained PPY@Fe3O4 composite nanoparticles exhibit good photostability and biocompatibility, and they can be used as multifunctional probes for MRI, thermal imaging, and photothermal ablation of cancer cells. © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Comparative study of phase structure and dielectric properties for K0.5Bi0.5TiO3-BiAlO3 and LaAlO3-BiAlO3

International Nuclear Information System (INIS)

Hou, Yudong; Zheng, Mupeng; Si, Meiju; Cui, Lei; Zhu, Mankang; Yan, Hui

2013-01-01

In this work, two perovskite-type compounds, K 0.5 Bi 0.5 TiO 3 and LaAlO 3 , have been selected as host material to incorporate with BiAlO 3 using a solid-state reaction route. The phase evolution and dielectric properties for both systems have been investigated in detail. For the K 0.5 Bi 0.5 TiO 3 -BiAlO 3 system, it is interesting to find that when using Bi 2 O 3 , Al 2 O 3 , K 2 CO 3 , and TiO 2 as starting materials, the formed compounds are K 0.5 Bi 0.5 TiO 3 -K 0.5 Bi 4.5 Ti 4 O 15 and Al 2 O 3 only plays a dopant role. There are two distinct dielectric peaks appearing in the patterns of temperature dependence of dielectric constant, corresponding to the phase-transition points of perovskite-type K 0.5 Bi 0.5 TiO 3 and Aurivillius-type K 0.5 Bi 4.5 Ti 4 O 15 , independently. In comparison, using Bi 2 O 3 , Al 2 O 3 , and La 2 O 3 as starting materials, the pure perovskite phase LaAlO 3 -BiAlO 3 can be obtained. Compared to the inherent paraelectric behavior in LaAlO 3 , the diffuse phase-transition phenomena can be observed in the LaAlO 3 -BiAlO 3 binary system, which corresponds well to the Vogel-Fulcher (VF) relationship. Moreover, compared to pure LaAlO 3 , the synthesized LaAlO 3 -BiAlO 3 compound shows enhanced dielectric properties, which are promising in application as gate dielectric materials. (copyright 2013 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

First-principles studies of various crystallographic phases and neutral atomic vacancies in KNbO3 and KTaO3

International Nuclear Information System (INIS)

Shigemi, A.; Koyama, T.; Wada, T.

2006-01-01

We evaluated enthalpies of formation and formation energies of neutral vacancies in KNbO 3 and KTaO 3 using a plane-wave pseudopotential method within a density functional formalism. The KNbO 3 (R3mR) phase with the lowest symmetry was found to have the lowest enthalpy of formation. On the other hand, the various virtual KTaO 3 phases (P4mm, Bmm2 and R3mR) with the lower symmetry were found to be approximately equal to the enthalpy of formation of a cubic KTaO 3 phase at 0 K. For both KNbO 3 and KTaO 3 , the formation energy of a K vacancy was found to be the lowest under an oxidizing atmosphere and that of an O vacancy was found to be the lowest under a reducing atmosphere. The formation energy of a Nb/Ta vacancy was the highest under both oxygen-rich and -poor conditions. These results are in good agreement with the empirical rule that B site defects in perovskite-type oxide do not exist. (copyright 2006 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Luminescence and defects creation in Ce3+-doped YAlO3 and Lu0.3Y0.7AlO3 crystals

International Nuclear Information System (INIS)

Blazek, K.; Nejezchleb, K.; Krasnikov, A.; Savikhina, T.; Zazubovich, S.; Nikl, M.

2005-01-01

Luminescence, energy transfer and defects creation processes were studied for the Ce 3+ -doped YAlO 3 and Lu x Y 1-x AlO 3 (x=0.3) crystals in the temperature range 4.2-300 K under selective photoexcitation in the energy range 3.5-11.5 eV. For the first time, defects creation spectra were measured and analyzed. Influence of the charge and ionic radii of co-doping ions on the luminescence and defects creation efficiency was considered. The origin of the defects created and possible mechanisms of their formation were discussed. (copyright 2005 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Hybrid HF-DFT comparative study of SrZrO{sub 3} and SrTiO{sub 3}(001) surface properties

Energy Technology Data Exchange (ETDEWEB)

Evarestov, R.A.; Bandura, A.V.; Alexandrov, V.E. [Department of Quantum Chemistry, St. Petersburg State University, 26 Universitetskii Prospekt, Stary Petergof, 198504 St. Petersburg (Russian Federation)

2006-10-15

Hybrid HF-DFT LCAO simulations of SrZrO{sub 3} and SrTiO{sub 3}(001) surface properties are performed in a single-slab model framework. The SrZrO{sub 3}(001) surface was studied by an ab initio method for the first time. Three slab models with different surface terminations including up to 8 atomic planes were used for calculation of the various surface characteristics (surface energies, atomic charges, density of electronic states). The dependence of the results on the chosen model and on the kind of d-element is analyzed. The dissimilarity in the surface oxygen atom contributions to the total density of states of two crystals is attributed to the more ionic nature of Zr-O bonds compared to Ti-O bonds. It is found that in the case of SrZrO{sub 3} the electronic density is biased towards the SrO-terminated surface and this surface should be more basic in nature than the SrO surface of SrTiO{sub 3} crystal. (copyright 2006 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Lattice dynamics of ZnAl{sub 2}O{sub 4} and ZnGa{sub 2}O{sub 4} under high pressure

Energy Technology Data Exchange (ETDEWEB)

Lopez-Moreno, S.; Rodriguez-Hernandez, P.; Munoz, A. [Departamento de Fisica Fundamental II, MALTA Consolider Team, Instituto de Materiales y Nanotecnologia Universidad de La Laguna, La Laguna 38205, Tenerife (Spain); Romero, A.H. [CINVESTAV-Queretaro Libramiento Norponiente No 2000 Real de Juriquilla 76230 Queretaro, Qro (Mexico); Manjon, F.J. [Instituto de Diseno para la Fabricacion y Produccion Automatizada, MALTA Consolider Team, Universitat Politecnica de Valencia, 46022 Valencia (Spain); Errandonea, D. [Fundacion General de la Universidad de Valencia ICMUV, MALTA Consolider Team, Edificio de Investigacion, C/Dr. Moliner 50, Burjassot, 46100 Valencia (Spain); Rusu, E.; Ursaki, V.V. [Institute of Applied Physics, Academy of Sciences of Moldova, 2028 Chisinau (Moldova)

2011-01-15

In this work we present a first-principles density functional study of the vibrational properties of ZnAl{sub 2}O{sub 4} and ZnGa{sub 2}O{sub 4} as function of hydrostatic pressure. Based on our previous structural characterization of these two compounds under pressure, herewith, we report the pressure dependence on both systems of the vibrational modes for the cubic spinel structure, for the CaFe{sub 2}O{sub 4}-type structure (Pnma) in ZnAl{sub 2}O{sub 4} and for marokite (Pbcm) ZnGa{sub 2}O{sub 4}. Additionally we report a second order phase transition in ZnGa{sub 2}O{sub 4} from the marokite towards the CaTi{sub 2}O{sub 4}-type structure (Cmcm), for which we also calculate the pressure dependence of the vibrational modes at the {gamma} point. Our calculations are complemented with Raman scattering measurements up to 12 GPa that show a good overall agreement between our calculated and measured mode frequencies. (Copyright copyright 2011 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

A versatile light-switchable nanorod memory: Wurtzite ZnO on perovskite SrTiO3

KAUST Repository

Kumar, Anup Bera

2013-04-25

Integrating materials with distinct lattice symmetries and dimensions is an effective design strategy toward realizing novel devices with unprecedented functionalities, but many challenges remain in synthesis and device design. Here, a heterojunction memory made of wurtzite ZnO nanorods grown on perovskite Nb-doped SrTiO3 (NSTO) is reported, the electronic properties of which can be drastically reconfigured by applying a voltage and light. Despite of the distinct lattice structures of ZnO and NSTO, a consistent nature of single crystallinity is achieved in the heterojunctions via the low-temperature solution-based hydrothermal growth. In addition to a high and persistent photoconductivity, the ZnO/NSTO heterojunction diode can be turned into a versatile light-switchable resistive switching memory with highly tunable ON and OFF states. The reversible modification of the effective interfacial energy barrier in the concurrent electronic and ionic processes most likely gives rise to the high susceptibility of the ZnO/NSTO heterojunction to external electric and optical stimuli. Furthermore, this facile synthesis route is promising to be generalized to other novel functional nanodevices integrating materials with diverse structures and properties. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Synthesis and crystal structure of the first Sc-Nb-O-N phases

Energy Technology Data Exchange (ETDEWEB)

Orthmann, Steven; Lerch, Martin [Institut fuer Chemie, Technische Universitaet Berlin (Germany)

2017-11-17

Synthesis of phase-pure materials in the system Sc-Nb-O-N is challenging. In this contribution we report on the preparation of the first scandium niobium oxide nitrides via reaction of water-saturated gaseous ammonia or an ammonia-oxygen mixture with amorphous scandium niobium oxides. Two new phases were obtained: rutile-type ScNb{sub 4}O{sub 7}N{sub 3}, which crystallizes in space group P4{sub 2}/mnm, and an anion-deficient fluorite-type Sc{sub 2}Nb(O,N,⬜){sub 6} phase crystallizing in space group Fm anti 3m. (copyright 2017 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Introduction of a quality management system at the Gemeinschaftskernkraftwerk Neckar GMBH (GKN)

International Nuclear Information System (INIS)

Haug, W.; Graeber, U.

1997-01-01

In the course of commissioning unit II of the GKN nuclear power plant, a Quality Assurance Manual was introduced in 1988. The Quality Assurance Manual is essentially based on the quality assurance elements of KTA 1401; that is, the emphasis is on quality assurance procedures for safety relevant plant components. During the actual application of the Quality Assurance Manual, however, it soon became apparent that this one-dimensional approach to quality management is not sufficient for the efficient organization of the quality related operational processes and procedures. The management of GKN decided at the end of 1992 to carry out a revision of the Quality Assurance Manual, with the objective of using quality, within the meaning of DIN ISO 9001, as a comprehensive organizational element for all operational processes and procedures. BTB-Jansky GmbH, a consulting firm familiar with the operational processes and procedures was commissioned to revise the Quality Assurance Manual, to investigate the procedures and implement a quality management system. The introduction of the quality management system has made it possible for the quality relevant processes and procedures at GKN to be regulated comprehensively and in a systematically transparent and workable manner. The introduction of the quality management system took place within the framework of an efficiency raising programme. It becomes apparent from this that the introduction of a quality management system is able to provide economic benefits for the operator. (orig.)

Double-walled ZrO{sub 2} nanotube array. Preparation and enhanced photocatalytic activity

Energy Technology Data Exchange (ETDEWEB)

Xue, Chaorui; Hu, Shengliang; Chang, Qing; Wang, Yanzhong [School of Materials Science and Engineering, North University of China, Taiyuan (China); Yang, Jinlong [School of Materials Science and Engineering, North University of China, Taiyuan (China); School of Materials Science and Engineering, Tsinghua University, Beijing (China)

2017-11-15

This work demonstrates the formation of self-ordered double-walled ZrO{sub 2} nanotube array via electrochemical anodization in glycerol-based electrolyte. Compared with its counterpart of single-walled ZrO{sub 2} nanotube array, the tube wall of double-walled ZrO{sub 2} nanotube split into outer and inner layers for the decomposition of glycerol during anodization process. Moreover, the double-walled structure showed its advantage of achieving improved utilization of light and higher specific surface area of nanotube array. Due to the unique double-walled structure, the double-walled ZrO{sub 2} nanotube array exhibited better photocatalytic activity than the single-walled ZrO{sub 2} nanotube array. (copyright 2017 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Maroc : La valeur de l'eau | IDRC - International Development ...

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

13 mai 2016 ... Le Maroc, au nord de l'Afrique, est un territoire en partie aride, où les pluies sont rares, mais où l'agriculture prospère malgré tout. Les changements climatiques ont cependant eu ici des effets majeurs dans les dernières années. Les précipitations ont diminué de 20 % et les vagues de chaleur ou de froid ...

Stable isotopes of carbon dioxide in the marine atmosphere along a hemispheric course from China to Antarctica

Science.gov (United States)

Chen, Qingqing; Zhu, Renbin; Xu, Hua

2013-12-01

During the 24th Chinese Antarctic Expedition, the air samples were collected at 10:00 and 22:00 (local time) along the track of ship “Xuelong” from Shanghai Harbor, China to Antarctica. Carbon dioxide (CO2) concentrations and its isotopic compositions were measured in these samples. Mean CO2 concentration at 22:00 (419.4 ± 27.1 ppmv) was higher than that at 10:00 (392.7 ± 20.0 ppmv), whereas δ13C-CO2 values at 22:00 (-8.58 ± 0.47‰) were lower than those at 10:00 (-8.23 ± 0.49‰), indicating that the 13C/12C ratio might be associated with the photosynthesis and respiration of terrestrial or marine organisms during the diurnal cycle. Overall the mean δ13C- and δ18O-CO2 were -8.39 ± 0.51‰ and 0.03 ± 1.39‰, respectively, from 30°N to 69°S, and the δ13C significantly negatively correlated with δ18O-CO2. A small but progressive increase in δ13C values with increasing latitudes southward was in good agreement with the expected trend. The enhanced CO2 concentrations occurred in the atmosphere close to Eurasia continent, Philippines, Malaysia and Indonesia, and the δ13C oscillations agreed well with anthropogenic pollution. In the range of 30°S-50°S, CO2 concentrations were generally low with relatively stable δ13C and δ18O values. In Antarctic Convergence Zone, a great difference of δ13C occurred between 10:00 and 22:00, and atmospheric CO2 was significantly depleted in 13C at 22:00. Our results indicated that the isotopic compositions of CO2 in the marine atmosphere might be a sensitive indicator for the strength of CO2 source and sink from the ocean.

Improved lithium cyclability and storage in mesoporous SnO2 electronically wired with very low concentrations (≤1 %) of reduced graphene oxide.

Science.gov (United States)

Shiva, Konda; Rajendra, H B; Subrahmanyam, K S; Bhattacharyya, Aninda J; Rao, C N R

2012-04-10

On the wire: Mesoporous tin dioxide (SnO(2)) wired with very low amounts (≤1 %) of reduced graphene oxide (rGO) exhibits a remarkable improvement in lithium-ion battery performance over bare mesoporous or solid nanoparticles of SnO(2). Reversible lithium intercalation into SnO(2)/SnO over several cycles was demonstrated in addition to conventional reversible lithium storage by an alloying reaction. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

A facile route to large-scale synthesis MoO{sub 2} and MoO{sub 3} as electrode materials for high-performance supercapacitors

Energy Technology Data Exchange (ETDEWEB)

Xuan, H.C.; Du, Y.W. [College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024 (China); Laboratory of Solid State Microstructures, Nanjing University, Nanjing, 210093 (China); Zhang, Y.Q.; Xu, Y.K.; Li, H.; Han, P.D. [College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024 (China); Wang, D.H. [Laboratory of Solid State Microstructures, Nanjing University, Nanjing, 210093 (China)

2016-09-15

MoO{sub 3} and MoO{sub 2} materials have been successfully synthesized by thermal decomposition of ammonium paramolybdate in air and a sealed quartz tube, respectively. The microstructure of as-synthesized MoO{sub 3} is composed of irregular lamellar plates with a plate thickness around 100 nm and MoO{sub 2} has the larger grain size with lamellar plates connected with each other. A maximum specific capacitance of 318 F/g at 0.5 A/g is obtained for MoO{sub 2} prepared in a closed environment. On the other hand, the sample MoO{sub 3} exhibits excellent rate capacity with specific capacitances of 218, 209, 196, 188, 176, and 160 F/g at current densities of 0.5, 1, 2, 3, 4, and 5 A/g, respectively. These results pave the way to consider MoO{sub 3} and MoO{sub 2} as prospective materials for energy-storage applications. (copyright 2016 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Electroluminescence from a n-ZnO/p-GaN hybrid LED

Energy Technology Data Exchange (ETDEWEB)

Behrends, Arne; Bakin, Andrey; Waag, Andreas [Institute of Semiconductor Technology, Hans-Sommer Str. 66, 38106 Braunschweig (Germany); Kwack, Ho-Sang; Dang, Le Si [Institut Neel, CNRS-UJF, 25, rue des Martyrs, 38042 Grenoble (France)

2010-06-15

In this work we report on the fabrication and characterization of a n-ZnO/p-GaN heterojunction LED. The p-GaN layer was fabricated using MOCVD on Al{sub 2}O{sub 3} with Mg as the acceptor whereas the ZnO nanostructures were grown in a very simple vapor transport system without any additionally doping. Room temperature electroluminescence (EL) measurements show green deep band emission centered at 2.3 eV which is clearly visible with the naked eye when the structure is forward biased. Cathodoluminescence mapping was performed to explain the absence of the band edge emission in the EL spectrum. (copyright 2010 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

African Crop Science Journal - Vol 23, No 2 (2015)

African Journals Online (AJOL)

Etude comparative de la salinite de l'eau et des sols dans la zone Nord des Niayes (Senegal) · EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT · DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT. MD Diallo, O Ndiaye, M Mahamat Saleh, A Tine, A Diop, A Guisse, 101-111 ...

Binding SnO2 nanocrystals in nitrogen-doped graphene sheets as anode materials for lithium-ion batteries.

Science.gov (United States)

Zhou, Xiaosi; Wan, Li-Jun; Guo, Yu-Guo

2013-04-18

Hybrid anode materials for Li-ion batteries are fabricated by binding SnO2 nanocrystals (NCs) in nitrogen-doped reduced graphene oxide (N-RGO) sheets by means of an in situ hydrazine monohydrate vapor reduction method. The SnO2NCs in the obtained SnO2NC@N-RGO hybrid material exhibit exceptionally high specific capacity and high rate capability. Bonds formed between graphene and SnO2 nanocrystals limit the aggregation of in situ formed Sn nanoparticles, leading to a stable hybrid anode material with long cycle life. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Al-doped ZnO nanofilms: Synthesis and characterization

Energy Technology Data Exchange (ETDEWEB)

Huczko, A.; Dabrowska, A. [Department of Chemistry, Warsaw University, Warsaw (Poland); Madhup, D.K. [Department of Physics, Kathmandu University, Dhulikhel (Nepal); College of Biomedical Engineering and Applied Sciences, Hadigaun, Kathmandu (Nepal); Subedi, D.P.; Chimouriya, S.P. [Department of Physics, Kathmandu University, Dhulikhel (Nepal)

2010-12-15

Al-doped and un-doped ZnO nanofilms on quartz substrate were obtained by ultrasonic spray pyrolysis of salt solutions (mole concentration of Al within 0-10%). The films were characterized by Scanning electron microscopy (SEM), X-ray diffraction (XRD), Atomic force microscopy (AFM) and UV spectroscopy to study the morphology and optical properties. The optical studies showed that the increase in Al within ZnO thin layer increases its band gap energy. The obtained value of band gap energy is very close to the determined oscillation energy. However, the dispersion energy is nearly half of band gap energy value. (Copyright copyright 2010 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Tratamento anaeróbio de resíduos orgânicos com baixa concentração de sólidos Anaerobic treatment of organic wastes with low concentration of solids

Directory of Open Access Journals (Sweden)

Maria L. D. de Luna

2009-03-01

Full Text Available Este trabalho foi realizado com o objetivo de avaliar o desempenho de reator anaeróbio compartimentado no tratamento de resíduos sólidos orgânicos com baixa concentração de sólidos. O reator anaeróbio compartimentado possuía capacidade unitária de 2.200 litros, era dividido em seis câmaras de iguais dimensões e foi operado com tempo de retenção de sólidos de 90 dias. Os resíduos sólidos orgânicos utilizados para alimentação do reator eram constituídos de resíduos sólidos vegetais e de lodo de esgoto sanitário na proporção de 80% e 20%, respectivamente. A mistura desses dois tipos de resíduos originava o substrato, o qual, após a correção da umidade para 95% (percentagem em massa, era alimentado ao reator. A eficiência de redução de material carbonáceo situou-se em torno de 80%, com carga orgânica aplicada de 9,3 kg R SO m-3 dia-1. A taxa de produção de biogás obtida foi de 5,6 L kg-1substrato (base úmida, com percentagem em volume de 50% de gás metano.The object of this study was to evaluate the use of a compartmented anaerobic reactor to treat organic solid waste with low concentration of solids. The reactor with a total capacity of 2.200 liters, divided into 6 equal chambers, was operated at a solid retention time of 90 days. The organic solids used to feed the reactor were comprised by vegetable residues and sanitary sludge in the proportion 80% and 20% respectively. The mixture of these two types of residues after the humidity correction to 95% (percentage by weight was used to feed the reactor. The removal efficiency of carbonaceous material was approximately 80% at an organic loading of 9.3 kg residual organic solids m-3 d-1. The rate of biogas production was 5.6 L kg-1substrate (wet weight with a methane concentration of 50% by volume.

2D Electron Gas with 100% Spin-Polarization in the (LaMnO3)2/(SrTiO3)2 Superlattice under Uniaxial Strain

KAUST Repository

Cossu, Fabrizio

2014-07-28

By first-principles calculations we investigate the structural, electronic, and magnetic properties of the (LaMnO3)2/(SrTiO3)2 superlattice. We find that a monoclinic C2h symmetry is energetically favorable and that the spins order ferromagnetically. Under both compressive and tensile uniaxial strain the electronic structure of the superlattice shows a half-metallic character. In particular, a fully spin-polarized two-dimensional electron gas, which traces back to the Ti 3dxy orbitals, is achieved under compressive uniaxial strain. The (LaMnO3)2/(SrTiO3)2 superlattice is analysed with respect to its structure, magnetism, and electronic properties. Our results demonstrate that uniaxial strain in an experimentally accessible range, both tensile and compressive, can be used to induce half-metallicity. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

High-pressure synthesis and single-crystal structure elucidation of the indium oxide-borate In{sub 4}O{sub 2}B{sub 2}O{sub 7}

Energy Technology Data Exchange (ETDEWEB)

Ortner, Teresa S.; Vitzthum, Daniela; Heymann, Gunter; Huppertz, Hubert [Department of General, Inorganic and Theoretical Chemistry, Centre of Chemistry and Biomedicine (CCB), Leopold-Franzens-University Innsbruck (Austria)

2017-12-29

The indium oxide-borate In{sub 4}O{sub 2}B{sub 2}O{sub 7} was synthesized under high-pressure/high-temperature conditions at 12.5 GPa/1420 K using a Walker-type multianvil apparatus. Single-crystal X-ray structure elucidation showed edge-sharing OIn{sub 4} tetrahedra and B{sub 2}O{sub 7} units building up the oxide-borate. It crystallizes with Z = 8 in the monoclinic space group P2{sub 1}/n (no. 14) with a = 1016.54(3), b = 964.55(3), c = 1382.66(4) pm, and β = 109.7(1) . The compound was also characterized by powder X-ray diffraction and vibrational spectroscopy. (copyright 2017 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

A simple approach for synthesis of TiO{sub 2} nanotubes with through-hole morphology

Energy Technology Data Exchange (ETDEWEB)

Kant, Krishna; Losic, Dusan [University of South Australia, Ian Wark Research Institute, Mawson lakes, SA (Australia)

2009-07-15

The present work reports a simple approach for fabrication of self-standing titania (TiO{sub 2}) nanotube membranes with through-hole morphology. The method is hydrofluoric acid free and the pore opening of TiO{sub 2}nanotubes is performed by electrochemical thinning of the oxide barrier layer. A reduction of anodization voltage was applied at the end of the anodization process to cause a successful removal of the remaining barrier layer from the TiO{sub 2} nanotubes during their detachment from the underlying titanium substrate. (copyright 2009 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

The reduction of radioactive discharges from mine workings: rehabilitation results conducted by WISMUTH GmbH

International Nuclear Information System (INIS)

Knoch-Weber, J.

2002-01-01

With operations designed to rehabilitate uranium mining operations terminated in late 1990 running for ten years now, significant progress is evident at all sites of Wismut GmbH. Of the total of DM 13 billion earmarked by the federal authorities in 1991 for the implementation of this exceptionally large environmental restoration project, about DM 6.7 billion were spent by the end of 2000, and of this DM 3.7 billion for the remediation of sites located in Eastern Thuringia and DM 3 billion for sites located in Saxony. Safe shutdown of underground mine workings remains an essential remediation task at all former mining sites. Following international standard practices, the preferred option retained called for flooding of the underground workings, i.e. cessation of water pumping and filling of mine workings by the naturally rising ground water level. Filling and sealing of mines is aimed at achieving geomechanical stabilisation of the ground surface and at reducing and/or avoiding gaseous and aerosolised radioactive discharges into the environment as a source of mine-related public exposure. (orig.)

Multishelled CaO Microspheres Stabilized by Atomic Layer Deposition of Al2 O3 for Enhanced CO2 Capture Performance.

Science.gov (United States)

Armutlulu, Andac; Naeem, Muhammad Awais; Liu, Hsueh-Ju; Kim, Sung Min; Kierzkowska, Agnieszka; Fedorov, Alexey; Müller, Christoph R

2017-11-01

CO 2 capture and storage is a promising concept to reduce anthropogenic CO 2 emissions. The most established technology for capturing CO 2 relies on amine scrubbing that is, however, associated with high costs. Technoeconomic studies show that using CaO as a high-temperature CO 2 sorbent can significantly reduce the costs of CO 2 capture. A serious disadvantage of CaO derived from earth-abundant precursors, e.g., limestone, is the rapid, sintering-induced decay of its cyclic CO 2 uptake. Here, a template-assisted hydrothermal approach to develop CaO-based sorbents exhibiting a very high and cyclically stable CO 2 uptake is exploited. The morphological characteristics of these sorbents, i.e., a porous shell comprised of CaO nanoparticles coated by a thin layer of Al 2 O 3 (<3 nm) containing a central void, ensure (i) minimal diffusion limitations, (ii) space to accompany the substantial volumetric changes during CO 2 capture and release, and (iii) a minimal quantity of Al 2 O 3 for structural stabilization, thus maximizing the fraction of CO 2 -capture-active CaO. © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

HIGH-PRECISION C17O, C18O, AND C16O MEASUREMENTS IN YOUNG STELLAR OBJECTS: ANALOGUES FOR CO SELF-SHIELDING IN THE EARLY SOLAR SYSTEM

International Nuclear Information System (INIS)

Smith, Rachel L.; Young, Edward D.; Pontoppidan, Klaus M.; Morris, Mark R.; Van Dishoeck, Ewine F.

2009-01-01

Using very high resolution (λ/Δλ ∼ 95 000) 4.7 μm fundamental and 2.3 μm overtone rovibrational CO absorption spectra obtained with the Cryogenic Infrared Echelle Spectrograph infrared spectrometer on the Very Large Telescope (VLT), we report detections of four CO isotopologues-C 16 O, 13 CO, C 18 O, and the rare species, C 17 O-in the circumstellar environment of two young protostars: VV CrA, a binary T Tauri star in the Corona Australis molecular cloud, and Reipurth 50, an intermediate-mass FU Ori star in the Orion Molecular Cloud. We argue that the observed CO absorption lines probe a protoplanetary disk in VV CrA, and a protostellar envelope in Reipurth 50. All CO line profiles are spectrally resolved, with intrinsic line widths of ∼3-4 km s -1 (FWHM), permitting direct calculation of CO oxygen isotopologue ratios with 5%-10% accuracy. The rovibrational level populations for all species can be reproduced by assuming that CO absorption arises in two temperature regimes. In the higher temperature regime, in which the column densities are best determined, the derived oxygen isotope ratios in VV CrA are: [C 16 O]/[C 18 O] =690 ± 30; [C 16 O]/[C 17 O] =2800 ± 300, and [C 18 O]/[C 17 O]=4.1 ± 0.4. For Reipurth 50, we find [C 16 O]/[C 18 O] =490 ± 30; [C 16 O]/[C 17 O] =2200 ± 150, [C 18 O]/[C 17 O] = 4.4 ± 0.2. For both objects, 12 C/ 13 C are on the order of 100, nearly twice the expected interstellar medium (ISM) ratio. The derived oxygen abundance ratios for the VV CrA disk show a significant mass-independent deficit of C 17 O and C 18 O relative to C 16 O compared to ISM baseline abundances. The Reipurth 50 envelope shows no clear differences in oxygen CO isotopologue ratios compared with the local ISM. A mass-independent fractionation can be interpreted as being due to selective photodissociation of CO in the disk surface due to self-shielding. The deficits in C 17 O and C 18 O in the VV CrA protoplanetary disk are consistent with an analogous

Risk and protective factors for psychological distress among adolescents: a family study in the Nord-Trøndelag Health Study.

Science.gov (United States)

Myklestad, Ingri; Røysamb, Espen; Tambs, Kristian

2012-05-01

The study aimed to investigate potential adolescent and parental psychosocial risk and protective factors for psychological distress among adolescents and, in addition, to examine potential gender and age differences in the effects of risk factors on adolescent psychological distress. Data were collected among 8,984 Norwegian adolescents (13-19 years) and their parents in the Nord-Trøndelag Health Study (HUNT). The outcome measure was psychological distress (SCL-5). Bivariate regression analysis with generalized estimating equation (GEE) model showed that all parental self-reported variables (mental distress, substance use, social network, economic problems, unemployment and family structure) and adolescents' self-reported variables (leisure activities, social support from friends, school-related problems and substance use) were significantly associated with psychological distress among adolescents. Results revealed that in a multiple regression analysis with a GEE model, adolescent psychosocial variables, specifically academic-related problems and being bullied at school, emerged as the strongest predictors of psychological distress among adolescents after controlling for age, gender, and all parental and adolescent variables. The following psychosocial risk factors were significantly more important for girl's psychological distress compared to boys: problems with academic achievement, conduct problems in school, frequency of being drunk, smoking, dissatisfaction in school, living alone and seen parents being drunk. Academic achievement and being bullied at school were the psychosocial factors most strongly associated with psychological distress among adolescents. Parental factors had an indirect effect on adolescent psychological distress, through adolescents' psychosocial factors.

Observation de terrain et télédétection (Baie du Roi, Spitsberg nord-occidental

Directory of Open Access Journals (Sweden)

Dominique Laffly

1999-06-01

Full Text Available Les observations de terrain sont fondamentales en télédétection. Selon la finalité de l’étude, la description des paysages observés sera plus ou moins détaillée. Une simple reconnaissance des principaux postes d’occupation du sol demande peu d’indicateurs et ne nécessite pas une localisation à la tachèle près. En revanche, l’analyse du contenu des pixels en vue d’une modélisation statistique s’appuie sur une description thématique détaillée de points localisés très précisément. Dans ce cas les images utilisées doivent être correctement géoréférencées et la localisation sur le terrain se fait à l’aide d’un GPS différentiel. Restent les problèmes du choix des points à analyser ainsi que celui de l’observation elle-même de leur "contenu". Nous présentons dans cet article une méthode qui vise à répondre à ces deux questions. Notre approche est fondée sur la technique du sondage systématique non-aligné. Cette dernière permet de tenir compte à la fois de la valeur des points observés et de leur localisation pour définir le plan d’échantillonnage. Les exemples présentés sont issus d’une étude réalisée sur les sandurs de la presqu’île de Br¯gger au Spitsberg nord-occidental (images SPOT XSP.

Sédimentation et diagenèse des minéraux argileux du Jurassique supérieur-Crétacé dans le Jura méridional et le domaine subalpin (France, Sud-Est). Comparaison avec le domaine Atlantique Nord

OpenAIRE

Deconinck , Jean-François

1984-01-01

Le but de cette thèse est de décrire et d'expliquer l'évolution des assemblages argileux dans les Alpes occidentales depuis l'Oxfordien jusqu'au Crétacé supérieur, et de la comparer à celle connue dans l'Atlantique nord grâce aux forages DSDP. Etude géologique, sédimentologique et géochimique. Les assemblages argileux du Mésozolque supérieur (Malm - Crétacé) du domaine subalpin et du Jura mérldional sont étudiés par diffraction des rayons X, microscopie électronique à transmission et analyses...

CBE growth of high-quality ZnO epitaxial layers

Energy Technology Data Exchange (ETDEWEB)

El-Shaer, A.; Bakin, A.; Mofor, A.C.; Kreye, M.; Waag, A. [Institute of Semiconductor Technology, Technical University Braunschweig, Hans-Sommer-Strasse 66, 38106 Braunschweig (Germany); Blaesing, J.; Krost, A. [Institute of Experimental Physics, Otto-von-Guericke-University Magdeburg (Germany); Stoimenos, J. [Physics Department, Aristotele University, Univ. Campus, 54006 Thessaloniki (Greece); Pecz, B. [Research Institute for Technical Physics and Materials Science, Hungarian Academy of Sciences, P.O. Box 49, 1525 Budapest (Hungary); Heuken, M. [Aixtron AG, Kackertstr. 15-17, 52072 Aachen (Germany)

2006-03-15

Further improvements on the recently reported novel approach to zinc oxide Chemical Beam Epitaxy (CBE) are presented. Hydrogen peroxide is employed as a very efficient novel oxidant. ZnO layers with a thickness from 100 nm to 600 nm were grown on c-sapphire using a MgO buffer. PL-mapping as well as conductivity mapping shows a good uniformity across the 2 inch ZnO-on-sapphire epiwafers. The measured surface roughness for the best layers is as low as 0.26 nm. HRXRD measurements of the obtained ZnO layers show excellent quality of the single crystalline ZnO. The FWHM of the HRXRD (0002) rocking curves measured for the 2 inch ZnO-on-sapphire wafers is as low as 27 arcsec with a very high lateral homogeneity across the whole wafer. Plane view HRTEM observations reveal the very good quality of the ZnO films. The results indicate that CBE is a suitable technique to fabricate ZnO of very high structural quality, which can eventually be used as an alternative to bulk ZnO substrates. (copyright 2006 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Synthesis and characterization of organically linked ZnO nanoparticles

Energy Technology Data Exchange (ETDEWEB)

Chory, Christine; Riedel, Ingo; Parisi, Juergen [Energy and Semiconductor Research Laboratory (EHF), University of Oldenburg, Carl-von Ossietzky-Strasse 9-11, 26129 Oldenburg (Germany); Kruska, Carsten; Heimbrodt, Wolfram [Department of Physics and Material Sciences Center, Philipps-University Marburg, Renthof 5, 35032 Marburg (Germany); Feser, Clemens [NEXT ENERGY - EWE Research Centre for Energy Technology e.V., Carl-von Ossietzky-Strasse 15, 26129 Oldenburg (Germany); Beenken, Wichard J.D. [Department of Theoretical Physics I, Ilmenau University of Technology, Weimarer Strasse 25, 98693 Ilmenau (Germany); Hoppe, Harald [Department of Experimental Physics I, Ilmenau University of Technology, Weimarer Strasse 32, 98693 Ilmenau (Germany)

2012-11-15

We report on the solution-based synthesis and characterization of three-dimensional networks of ZnO nanoparticles where the formation of structures is achieved by covalently linking the nanocrystals with bifunctional organic ligands. The colloidal synthesis will be presented with application of two ligands that vary in size and binding sites. Furthermore we report on structural characterization of dried powders and thin films by means of X-ray diffraction and electron microscopy in order to examine the regularity of the structures. We also present first investigations of the optical properties and electrical conductance behavior in lateral direction of the differently linked hybrid ZnO networks. (Copyright copyright 2012 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Synthesis and characterization of organically linked ZnO nanoparticles

International Nuclear Information System (INIS)

Chory, Christine; Riedel, Ingo; Parisi, Juergen; Kruska, Carsten; Heimbrodt, Wolfram; Feser, Clemens; Beenken, Wichard J.D.; Hoppe, Harald

2012-01-01

We report on the solution-based synthesis and characterization of three-dimensional networks of ZnO nanoparticles where the formation of structures is achieved by covalently linking the nanocrystals with bifunctional organic ligands. The colloidal synthesis will be presented with application of two ligands that vary in size and binding sites. Furthermore we report on structural characterization of dried powders and thin films by means of X-ray diffraction and electron microscopy in order to examine the regularity of the structures. We also present first investigations of the optical properties and electrical conductance behavior in lateral direction of the differently linked hybrid ZnO networks. (Copyright copyright 2012 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Effects of B2O3-Li2O additions on the dielectric properties of screen printing Ba0.6Sr0.4TiO3 thick films

International Nuclear Information System (INIS)

Zeng, Yike; Gao, Can; Zhang, Guangzu; Jiang, Shenglin

2012-01-01

Ba 0.6 Sr 0.4 TiO 3 (BST) thick films were fabricated on Al 2 O 3 substrate via the screen printing technology by using B 2 O 3 -Li 2 O additions as liquid-phase sintering aids. The effects of doping of B 2 O 3 and Li 2 CO 3 on the phase compositions, microstructures, and dielectric tunable properties of the thick films were investigated systematically. The X-ray diffraction patterns showed that BST diffraction peaks shifted toward higher angle with the B 2 O 3 -Li 2 O doping content, which indicated the substitution of B 3+ and Li + in Ba 2+ site. It was also found that the grain size and electrical properties of the thick film were strongly affected by the glass content. The grain size and the relative permittivity decreased obviously with the increase of B 2 O 3 -Li 2 O additive. In addition, for the thick film with 4.5 wt% glass content, optimized sintering, and electrical properties were obtained: the sintering temperature of 900 C, relative permittivity of 312 (at 10 kHz), dielectric loss of 0.0039, tunability of 16.2% (at 3 kV/mm). These good sintering and electrical properties indicate that BST thick film with B 2 O 3 -Li 2 O addition is benefit for the development of LTCC technology and tunable devices. (Copyright copyright 2012 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Synthesis of hydrothermally reduced graphene/MnO2 composites and their electrochemical properties as supercapacitors

Science.gov (United States)

Li, Zhangpeng; Wang, Jinqing; Liu, Sheng; Liu, Xiaohong; Yang, Shengrong

2011-10-01

Hydrothermally reduced graphene/MnO2 (HRG/MnO2) composites were synthesized by dipping HRG into the mixed aqueous solution of 0.1 M KMnO4 and 0.1 M K2SO4 for different periods of time at room temperature. The morphology and microstructure of the as-prepared composites were characterized by field-emission scanning electron microscopy, X-ray diffraction, Raman microscope, and X-ray photoelectron spectroscopy. The characterizations indicate that MnO2 successfully deposited on HRG surfaces and the morphology of the HRG/MnO2 shows a three-dimensional porous structure with MnO2 homogenously distributing on the HRG surfaces. Capacitive properties of the synthesized composite electrodes were studied using cyclic voltammetry and electrochemical impedance spectroscopy in a three-electrode experimental setup using 1 M Na2SO4 aqueous solution as electrolyte. The main results of electrochemical tests are drawn as follows: the specific capacitance value of HRG/MnO2-200 (HRG dipped into the mixed solution of 0.1 M KMnO4 and 0.1 M K2SO4 for 200 min) electrode reached 211.5 F g-1 at a potential scan rate of 2 mV s-1; moreover, this electrode shows a good cyclic stability and capacity retention. It is anticipated that the synthesized HRG/MnO2 composites will find promising applications in supercapacitors and other devices in virtue of their outstanding characters of good cycle stability, low cost and environmentally benign nature.

Eesti Energia tegi esimesed tehingud elektribörsil / Kerli Nõu

Index Scriptorium Estoniae

Nõu, Kerli

2006-01-01

Eesti Energia ei avalikusta NordPoolil sõlmitud tehingute mahtu ärisaladuse tõttu. NordPooli börsil hajutavad riske energia tootjad, suurtarbijad ja hulgikauplejad, kes peavad end energia hinnatõusu vastu kaitsma. Järgmise aasta tulevikutehingute hinda mõjutavatest teguritest. Lisa: NordPool

Eventos El Niño y lluvias anormales en la Costa del Perú: siglos XVI-XIX

Directory of Open Access Journals (Sweden)

1992-01-01

Full Text Available ÉVÉNEMENTS EL NIÑO ET PLUIES ANORMALES SUR LA COTE DU PEROU, XVI - XIX SIECLES. L’établissement d’une chronologie des manifestations du phénomène “El Niño” au cours des siècles derniers revêt une grande importance pour les chercheurs qui étudient ce type d’altération presque périodique du climat du globe terrestre. C’est pour cela qu’ont été rassemblés ici les principaux textes historiques qui mentionnent des pluies anormales et les inondations de la côte nord du Pérou entre 1532 et 1891. Un tableau synoptique résume les dates disponibles sur les pluies et les inondations de la côte nord du Pérou et comprend une critique des sources historiques ainsi qu’un essai de classification des anomalies climatiques. L’analyse des sources présentées ici conduit les auteurs à mettre en doute la reconstitution de l’avènement, ou de l’intensité, de certains évènements El Niño telles qu’elles ont été proposées par certains auteurs (Quinn et al., 1987. El establecimiento de una cronología de las ocurrencias del fenómeno El Niño en los últimos siglos tiene mucha trascendencia para los investigadores que estudian este tipo de alteración casi periódica del clima del globo terráqueo. Para tal fin, se junta aquí los principales textos históricos que mencionan lluvias anormales y anomalías meteorológicas ocurridas en el Perú entre 1532 y 1891. Un cuadro sinóptico resume los datos disponibles sobre las lluvias e inundaciones de la costa norte del Perú, e incluye una crítica de las fuentes históricas así como un intento de clasificación de las anomalías climáticas. El análisis de estas fuentes aquí presentadas lleva los autores a poner en duda la reconstitución de la ocurrencia y de la intensidad de algunos eventos El Niño tal como fueron propuestas por autores anteriores (Quinn et al., 1987. EL NIÑO PHENOMENA AND UNUSUAL PRECIPITATIONS IN COASTAL PERU, XVI-XIXTH CENTURIES. The establishment of a

Gate-controlled metal-insulator transition in the LaAlO{sub 3}/SrTiO{sub 3} system with sub-critical LaAlO{sub 3} thickness

Energy Technology Data Exchange (ETDEWEB)

Lee, Joon Sung; Lee, Seung Ran; Chang, Jung-Won; Noh, Hyunho; Baasandorj, Lkhagvasuren; Shim, Seung-Bo; Kim, Jinhee [Korea Research Institute of Standards and Science, Daejeon 305-600 (Korea, Republic of); Seung, Sang Keun; Shin, Hyun Sup; Song, Jonghyun [Department of Physics, Chungnam National University, Daejeon 305-764 (Korea, Republic of)

2012-12-15

We studied the electrical conduction in the LaAlO{sub 3}/SrTiO{sub 3} (LAO/STO) interface electron system with a sub-critical LAO layer thickness of {proportional_to}3.5 unit cells (uc). It was found that the true dividing point between metallic and insulating behaviour without gating lies near the LAO thickness of 3.5 uc. Our marginally metallic 3.5 uc sample showed a sharp transition to insulating state at temperatures which strongly depended on the applied negative back-gate voltage. The superior gate-controllability of the sample was attributed to its sheet carrier density which was an order of magnitude lower than those of conducting LAO/STO samples with 4 uc or more of LAO layers. (copyright 2012 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Electrodeposition of hybrid ZnO/organic dye films

Energy Technology Data Exchange (ETDEWEB)

Moya, Monica; Mari, Bernabe; Mollar, Miquel [Department de Fisica Aplicada-IDF, Universitat Politecnica de Valencia, Cami de Vera s/n, 46022 Valencia (Spain)

2011-06-15

The viability of the electrodeposition as a suitable technique for preparing new porous hybrid materials has been tested in this paper. Hybrid ZnO films with two different organic dyes: Eosin-Y and Tetrasulphonated-Cu-phtalocyanine were prepared. Their physical and chemical properties as well as their dependence on the growth conditions were investigated. It is found that the type of dye has a big influence on the morphology and porosity of hybrid films. Open and connected pores are created in hybrid ZnO/Eosin-Y films while both open and closed pores coexist in hybrid ZnO/Tetrasulfonated-Cu-phthalocyanine. As one of the promising applications of hybrid materials is photovoltaic conversion of sunlight, photoelectrochemical characterization of hybrid films is also reported. Photocurrent generation owing to both contributions ZnO and Eosin-Y is observed in ZnO/Eosin-Y films but no photocurrent has been observed in ZnO/Tetrasulfonated-Cu-phthalocyanine films. SEM micrographs of hybrid ZnO films grown in aqueous bath; (Left) ZnO/Eosin-Y films grown at 70 C, -0.9 V (Right) ZnO/Ts-CuPc films grown at 70 C, -0.9 V. (copyright 2011 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Reduced graphene oxide-wrapped MoO3 composites prepared by using metal-organic frameworks as precursor for all-solid-state flexible supercapacitors.

Science.gov (United States)

Cao, Xiehong; Zheng, Bing; Shi, Wenhui; Yang, Jian; Fan, Zhanxi; Luo, Zhimin; Rui, Xianhong; Chen, Bo; Yan, Qingyu; Zhang, Hua

2015-08-26

Reduced graphene oxide-wrapped MoO3M (rGO/MoO3 ) is prepared by a novel and simple method that is developed by using a metal-organic framework as the precursor. After a two-step annealing process, the obtained rGO/MoO3 composite is used for a high-performance supercapacitor electrode. Moreover, an all-solid-state flexible supercapacitor is fabricated based on the rGO/MoO3 composite, which shows stable performance under different bending states. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

High-performance supercapacitors based on nanocomposites of Nb{sub 2}O{sub 5} nanocrystals and carbon nanotubes

Energy Technology Data Exchange (ETDEWEB)

Wang, Xiaolei; Chen, Zheng; Lu, Yunfeng [Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, CA (United States); Li, Ge [Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, CA (United States); Department of Physics, East China Normal University, Shanghai (China); Augustyn, Veronica; Dunn, Bruce [Department of Material Science and Engineering, University of California, Los Angeles, CA (United States); Ma, Xueming [Department of Physics, East China Normal University, Shanghai (China); Wang, Ge [School of Materials Science and Engineering, University of Science and Technology, Beijing (China)

2011-11-15

Nanocomposites of CNTs and Nb{sub 2}O{sub 5} nanocrystals were fabricated exhibiting excellent conductivity, high specific capacitance, and large voltage window, which led to successful fabrication of asymmetric supercapacitors with high energy densities, power densities, and cycling stability. (Copyright copyright 2011 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Study of structural and transport properties of nanostructured CeO{sub 2}, Ce{sub 1-x}Ru{sub x}O{sub 2} and Ce{sub 1-x}In{sub x}O{sub 2} thin films

Energy Technology Data Exchange (ETDEWEB)

Rangel, R.; Chavez-Chavez, L. [Division de Estudios de Posgrado, Facultad de Ingenieria Quimica, Universidad Michoacana de S.N.H. (Mexico); Martinez, E. [Centro de Investigacion en Materiales Avanzados, S.C. (CIMAV), Nuevo Leon (Mexico); Bartolo-Perez, P. [Departamento de Fisica Aplicada, CINVESTAV-IPN, Merida, Yucatan (Mexico)

2012-06-15

The present work reports for the first time thin films prepared from Ce{sub 1-x}M{sub x}O{sub 2-{delta}} (M = Ru, In) solid solutions for application as gas sensors. The CeO{sub 2}, Ce{sub 0.95}Ru{sub 0.05}O{sub 2} and Ce{sub 0.95}In{sub 0.05}O{sub 2} thin films were prepared by means of the RF sputtering process onto Si (111) substrates. The deposition conditions were carried out at 500 C varying the deposition time. Targets were prepared via sol-gel process starting from C{sub 6}H{sub 9}O{sub 6}In, Ru{sub 3}(CO){sub 12} and Ce(C{sub 2}H{sub 3}O{sub 2}){sub 3} . 1.5H{sub 2}O compounds and using a ceramic method to consolidate them. The samples were characterized by means of XRD, SEM, and AFM. Their thickness was measured using a profilometer. The results herein obtained regarding the microstructure and transport properties indicate that these materials can be used as gas sensors. (Copyright copyright 2012 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Comparative study of potentially J{sub eff} = 0 ground state iridium(V) in SrLaNiIrO{sub 6}, SrLaMgIrO{sub 6}, and SrLaZnIrO{sub 6}

Energy Technology Data Exchange (ETDEWEB)

Wolff, Klaus K.; Agrestini, Stefano; Tjeng, Liu Hao [Max Planck Institute for Chemical Physics of Solids, Dresden (Germany); Tanaka, Arata [Department of Quantum Matter, AdSM, Hiroshima University, Higashi-Hiroshima (Japan); Jansen, Martin [Max Planck Institute for Chemical Physics of Solids, Dresden (Germany); Max Planck Institute for Solid State Research, Stuttgart (Germany)

2017-12-13

A series of polycrystalline double perovskites SrLaBIrO{sub 6} (B = Ni, Mg, Zn) containing Ir{sup 5+} (5d{sup 4}) was synthesized by solid state reactions, and structural, magnetic and electronic properties were investigated. The isotypic fully ordered double perovskites crystallize in space group P2{sub 1}/n and show semiconducting behavior with estimated bandgaps of approximately 0.2 eV for SrLaNiIrO{sub 6} and SrLaZnIrO{sub 6}, and 0.4 eV for SrLaMgIrO{sub 6}. SrLaNiIrO{sub 6} is an antiferromagnet with a Neel temperature of 74 K (μ{sub eff} = 3.3 μ{sub B}, θ{sub W} = -90 K), whereas SrLaMgIrO{sub 6} and SrLaZnIrO{sub 6} are weakly paramagnetic. All title compounds exhibit a temperature-independent contribution to the measured magnetic susceptibility, which supports the notion for a van-Vleck-type response originating from the Ir{sup 5+} (5d{sup 4}, J{sub eff} = 0) ions. (copyright 2017 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Growth and Transfer of Monolithic Horizontal ZnO Nanowire Superstructures onto Flexible Substrates

KAUST Repository

Xu, Sheng

2010-04-28

A method of fabricating horizontally aligned ZnO nanowire (NW) arrays with full control over the width and length is demonstrated. A cross-sectional view of the NWs by transmission electron microscopy shows a "mushroom-like" structure. Novel monolithic multisegment superstructures are fabricated by making use of the lateral overgrowth. Ultralong horizontal ZnO NWs of an aspect ratio on the order often thousand are also demonstrated. These horizontal NWs are lifted off and transferred onto a flexible polymer substrate, which may have many great applications in horizontal ZnO NW-based nanosensor arrays, light-emitting diodes, optical gratings, integrated circuit interconnects, and high-output-power alternating-current nanogenerators. © 2010 WILEY-VCH Verlag GmbH & Co. KGaA.

Birnessite-type MnO2 nanosheets with layered structures under high pressure: elimination of crystalline stacking faults and oriented laminar assembly.

Science.gov (United States)

Sun, Yugang; Wang, Lin; Liu, Yuzi; Ren, Yang

2015-01-21

Squeezing out crystalline stacking faults: Birnessite-type δ-phase MnO2 microflowers containing interconnected ultrathin nanosheets are synthesized through a microwave-assisted hydrothermal process and exhibit a layered crystalline structure with significant stacking faults. Compressing these MnO2 nanosheets in a diamond anvil cell with high pressure up to tens of GPa effectively eliminates the crystalline stacking faults. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Study of photoluminescence from annealed bulk-ZnO single crystals

Energy Technology Data Exchange (ETDEWEB)

Yoneta, M.; Ohishi, M.; Saito, H. [Department of Applied Physics, Okayama University of Science, 1-1 Ridai-cho, Okayama 700-0005 (Japan); Yoshino, K. [Department of Electrical and Electronic Engineering, Miyazaki University, 1-1 Gakuen Kibanadai-nishi, Miyazaki 889-2192 (Japan); Honda, M. [Faculty of Science, Naruto University of Education, 748 Nakajima, Takashima, Naruto-cho, Naruto-shi 772-8502 (Japan)

2006-03-15

We have investigated the influence of rapid thermal annealing on the photoluminescence of bulk-ZnO single crystal. As-grown ZnO wafer, illuminated by 325 nm ultraviolet light at 4.2 K, emitted the visible luminescence of pale green centered of 2.29 eV. The luminescence was observed by the anneal at the temperature range between 400 C and 1000 C, however, its intensity decreased with anneal temperature. The free-exciton and the 2.18 eV emission line were obtained by the anneal at 1200 C for 60 sec. From the X-ray diffraction and the surface morphology measurements, the improvement of the crystallinity of bulk-ZnO crystal were confirmed. We suggest that a rapid thermal annealing technique is convenience to improve the the quality of bul-ZnO single crystals. (copyright 2006 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Temperature-dependent polarized luminescence of exciton polaritons in a ZnO film

Energy Technology Data Exchange (ETDEWEB)

Toropov, A.A.; Nekrutkina, O.V.; Shubina, T.V. [Ioffe Physico-Technical Institute, Russian Academy of Sciences, St. Petersburg 194021 (Russian Federation); Gruber, Th.; Kirchner, C. [Department of Semiconductor Physics, Ulm University, 89081 Ulm (Germany); Waag, A. [Institute of Semiconductor Technology, Braunschweig Technical University, 38106 Braunschweig (Germany); Karlsson, K.F.; Monemar, B. [Linkoeping University, 581 83 Linkoeping (Sweden)

2005-02-01

We report on the studies of linearly polarized photoluminescence (PL) in a (0001) oriented ZnO epitaxial film, grown by metal organic chemical vapor deposition on a GaN template. The emission of mixed longitudinal-transverse exciton polariton modes was observed up to 130 K that evidences polaritonic nature of the excitonic spectrum up to this elevated temperature. (copyright 2005 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Enhancement of Oxidative Desulfurization Performance over UiO-66(Zr) by Titanium Ion Exchange.

Science.gov (United States)

Ye, Gan; Qi, Hui; Li, Xiaolin; Leng, Kunyue; Sun, Yinyong; Xu, Wei

2017-07-19

Oxidative desulfurization is considered to be one of the most promising methods for producing ultra-low-sulfur fuels because it can effectively remove refractory sulfur-containing aromatic compounds under mild conditions. In this work, the oxidative desulfurization performance over UiO-66(Zr) is greatly enhanced by Ti ion exchange. This strategy is not only efficient for UiO-66(Zr) with crystal defects but also for UiO-66(Zr) with high crystallinity. In particular, the performance of UiO-66(Zr) with high crystallinity in the oxidative desulfurization of dibenzothiophene can be improved more than 11-fold, which can be mainly attributed to the introduction of active Ti sites. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

Tratamento anaeróbio de resíduos sólidos orgânicos com alta e baixa concentração de sólidos Anaerobic treatment of organic solid waste with high and low concentrations of solids

Directory of Open Access Journals (Sweden)

Valderi D. Leite

2009-04-01

Full Text Available A finalidade principal deste trabalho foi estudar o tratamento anaeróbio de resíduos sólidos orgânicos com alta e baixa concentração de sólidos. O sistema experimental se compunha de dois reatores com capacidade unitária de 2.200 L, enquanto o substrato utilizado era composto de resíduos sólidos vegetais e lodo de esgotos sanitários, sendo um dos reatores alimentado com substrato contendo 20% de sólidos totais (80% de umidade e o outro com apenas 5% de sólidos totais (95% de umidade. Verificou-se, quando da utilização de substrato contendo 5% (percentagem em peso de sólidos totais, que o tempo de retenção de sólidos requerido para que fossem alcançados 80% de redução da massa de DQO aplicada, foi de 90 dias, propiciando uma taxa de produção de gás metano de 0,25 Nm³ CH4 kg-1 DQO Aplicada. Com relação ao substrato contendo 20% de sólidos totais, o tempo de retenção de sólidos requerido para bioestabilizar 80% da massa de DQO aplicada, foi de 270 dias, com taxa de produção de gás metano de 0,10 Nm³ CH4 kg-1 DQO Aplicada.In this study the anaerobic treatment of organic solid waste with high and low concentrations of solids was studied. The experimental system comprised of two reactors, with unitary capacity of 2,200 L, while the used substrate was composed of solid vegetable waste and sludge. One of the reactors was loaded with substrate containing 20% of total solids and the other with only 5% of total solids on weight basis. It was verified that, for the substrate containing 5% of total solids, the retention time of solids required for 80% reduction of the applied COD mass was 90 days, during which the methane gas production rate was of 0.25 Nm³ kg-1 COD Applied; whereas in the substrate containing 20% of total solids, the retention time of solids required for biostabilization of 80% of the mass of applied COD was 270 days, with a methane gas production rate of 0.1 Nm³ CH4 kg-1 COD Applied.

Climatologia da precipitação no município do Rio de Janeiro Precipitation climatology of the city of Rio de Janeiro

Directory of Open Access Journals (Sweden)

Claudine Pereira Dereczynski

2009-03-01

Full Text Available Uma climatologia preliminar da precipitação no município do Rio de Janeiro é elaborada utilizando-se 10 anos de dados observados na rede de 30 postos pluviométricos da Fundação Geo-Rio. A distribuição espacial do total pluviométrico anual médio mostra que os máximos concentram-se junto aos três maciços existentes na cidade: na Serra da Carioca (2200 mm na Serra do Mendanha (1400 mm e na Serra Geral de Guaratiba (1200 mm. Tais valores reduzem-se em direção às planícies, sendo um mínimo de 900 mm observado na Zona Norte da cidade. A estação Sumaré destaca-se por seus elevados índices pluviométricos durante todo o ano, especialmente em setembro quando a precipitação média mensal (297,5 mm chega a ser cerca de sete vezes maior do que a dos postos localizados na Zona Norte. No Sumaré são observados em média 119 dias de chuva ao ano, enquanto, por exemplo, na Penha ocorre chuva em apenas 86 dias. A análise dos eventos de chuvas intensas indicou que 77% dos 160 casos selecionados, foram provocados por sistemas frontais, que ocorrem durante todo o ano, com menor freqüência no inverno. Eventos associados à Zona de Convergência do Atlântico Sul (13% e sistemas convectivos de mesoescala (8% predominam no verão. Chuvas intensas geradas por efeito de circulação marítima ocorreram em apenas 2% dos casos.A preliminary 10-year precipitation climatology of Rio de Janeiro is elaborated by means of the Geo-Rio Foundation rain gauge network. The spatial distribution of annual precipitation shows that the maxima coincide with the three hills in the city: Carioca (2200 mm, Mendanha (1400 mm and Geral de Guaratiba (1200 mm. The precipitation values decrease toward the plain, with minimum values in the Northern Zone. The precipitation is greater at the Sumaré gauge than in all the other places throughout the year, especially in September when the monthly mean precipitation (297.5 mm is seven times greater than the precipitation

Composition influence on positron annihilation parameters in ZnO-based nanocrystal semiconductor powders

Energy Technology Data Exchange (ETDEWEB)

Damonte, L.C.; Hernandez Fenollosa, M.A.; Donderis, V.; Mari, B. [Departamento de Fisica Aplicada, Universidad Politecnica de Valencia, Cami de Vera s/n, Valencia, 46071 (Spain)

2007-07-01

Zn{sub 1-x}Mg{sub x}O powders at various compositions were obtained by mechanical milling from the binary oxides. The progressive incorporation of Mg atoms into the ZnO lattice was monitored by X-ray diffraction (XRD). The evolution of annihilation parameters with milling time and composition were analyzed and related to the possible types of mechanical and substitutional induced defect present. It was concluded that the average lifetime constitute a useful parameter to sense the complete cation substitution in the wurtzite structure. (copyright 2007 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Composition influence on positron annihilation parameters in ZnO-based nanocrystal semiconductor powders

International Nuclear Information System (INIS)

Damonte, L.C.; Hernandez Fenollosa, M.A.; Donderis, V.; Mari, B.

2007-01-01

Zn 1-x Mg x O powders at various compositions were obtained by mechanical milling from the binary oxides. The progressive incorporation of Mg atoms into the ZnO lattice was monitored by X-ray diffraction (XRD). The evolution of annihilation parameters with milling time and composition were analyzed and related to the possible types of mechanical and substitutional induced defect present. It was concluded that the average lifetime constitute a useful parameter to sense the complete cation substitution in the wurtzite structure. (copyright 2007 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Low leakage stoichiometric SrTiO{sub 3} dielectric for advanced metal-insulator-metal capacitors

Energy Technology Data Exchange (ETDEWEB)

Popovici, Mihaela; Kaczer, Ben; Redolfi, Augusto; Elshocht, Sven van; Jurczak, Malgorzata [imec Belgium, Leuven (Belgium); Afanas' ev, Valeri V. [Department of Physics and Astronomy, KU Leuven (Belgium); Sereni, Gabriele [DISMI, Universita degli Studi di Modena e Reggio Emilia, (Italy); Larcher, Luca [DISMI, Universita degli Studi di Modena e Reggio Emilia, (Italy); MDLab, Saint Christophe (Italy)

2016-05-15

Metal-insulator-metal capacitors (MIMCAP) with stoichiometric SrTiO{sub 3} dielectric were deposited stacking two strontium titanate (STO) layers, followed by intermixing the grain determining Sr-rich STO seed layer, with the Ti-rich STO top layer. The resulted stoichiometric SrTiO{sub 3} would have a structure with less defects as demonstrated by internal photoemission experiments. Consequently, the leakage current density is lower compared to Sr-rich STO which allow further equivalent oxide thickness downscaling. (copyright 2016 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

High-performance supercapacitors based on intertwined CNT/V{sub 2}O{sub 5} nanowire nanocomposites

Energy Technology Data Exchange (ETDEWEB)

Chen, Zheng; Shen, Meiqing [School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 (China); Augustyn, Veronica; Dunn, Bruce [Department of Materials Science and Engineering, University of California, Los Angeles, CA 90095 (United States); Wen, Jing; Zhang, Yuewei [Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, CA 90095 (United States); School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072 (China); Lu, Yunfeng [Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, CA 90095 (United States)

2011-02-08

High-performance asymmetric super-capacitors containing thick-film electrodes (over 100 {mu}m thick) made of CNT/V{sub 2}O{sub 5} nanowire composite are designed. The excellent conductivity, high specific capacitance, and a large voltage window of the CNT/V{sub 2}O{sub 5} nanocomposite enable the fabrication of devices with high energy and high power densities. Moreover, the resulting devices exhibit excellent cycling stability. This supercapacitor approach may be attractive for a wide range of device applications. (Copyright copyright 2011 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Superconductivity induced by oxygen doping in Y{sub 2}O{sub 2}Bi

Energy Technology Data Exchange (ETDEWEB)

Cheng, Xiyue; Deng, Shuiquan [State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter (FJIRSM), Chinese Academy of Sciences (CAS), Fuzhou (China); Gordon, Elijah E. [Department of Chemistry, North Carolina State University, Raleigh, NC (United States); Whangbo, Myung-Hwan [State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter (FJIRSM), Chinese Academy of Sciences (CAS), Fuzhou (China); Department of Chemistry, North Carolina State University, Raleigh, NC (United States)

2017-08-14

When doped with oxygen, the layered Y{sub 2}O{sub 2}Bi phase becomes a superconductor. This finding raises questions about the sites for doped oxygen, the mechanism of superconductivity, and practical guidelines for discovering new superconductors. We probed these questions in terms of first-principles calculations for undoped and O-doped Y{sub 2}O{sub 2}Bi. The preferred sites for doped O atoms are the centers of Bi{sub 4} squares in the Bi square net. Several Bi 6p x/y bands of Y{sub 2}O{sub 2}Bi are raised in energy by oxygen doping because the 2p x/y orbitals of the doped oxygen make antibonding possible with the 6p x/y orbitals of surrounding Bi atoms. Consequently, the condition necessary for the ''flat/steep'' band model for superconductivity is satisfied in O-doped Y{sub 2}O{sub 2}Bi. (copyright 2017 Wiley-VCH Verlag GmbH and Co. KGaA, Weinheim)

WO3–x@Au@MnO2 core–shell nanowires on carbon fabric for high-performance flexible supercapacitors.

Science.gov (United States)

Lu, Xihong; Zhai, Teng; Zhang, Xianghui; Shen, Yongqi; Yuan, Longyan; Hu, Bin; Gong, Li; Chen, Jian; Gao, Yihua; Zhou, Jun; Tong, Yexiang; Wang, Zhong Lin

2012-02-14

WO3–x@Au@MnO2 core–shell nanowires (NWs) are synthesized on a flexible carbon fabric and show outstanding electrochemical performance in supercapacitors such as high specific capacitance, good cyclic stability, high energy density, and high power density. These results suggest that the WO3–x@Au@MnO2 NWs have promising potential for use in high-performance flexible supercapacitors. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

A Long Journey from Childhood to Senility: The 23rd HUPO BPP Workshop: 16-17 April 2015, São Paulo, Brazil.

Science.gov (United States)

Magraoui, Fouzi El; Schrötter, Andreas; Heinsen, Helmut; Leite, Renata; Park, Young Mok; Meyer, Helmut E; Grinberg, Lea T

2015-09-01

The HUPO Brain Proteome Project (HUPO BPP) held its 23rd workshop in São Paulo, Brazil, April 16-17, 2015. The focus of the spring workshop was on strategies and predictive therapies concerning neurodegenerative diseases. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Liquens brasileiros: novas descobertas evidenciam a riqueza no Norte e Nordeste do país

OpenAIRE

Marcela Eugenia da Silva Cáceres; Edvaneide Leandro de Lima Nascimento; André Aptroot; Robert Luecking

2014-01-01

A maioria das espécies não descritas de fungos é esperada em áreas pouco estudadas, como as florestas tropicais ou habitats pouco explorados como fungos que vivem em insetos, plantas, ou liquens. O Filo Ascomycota apresenta o maior número de espécies dentro do Reino Fungi, sendo que cerca da metade destas espécies são liquenizadas, ou seja, associam-se a algas e/ou cianobactérias e formam os liquens. Estes fungos liquenizados, de maneira geral, têm sido muito pouco estudados no Norte e Nordes...

Single-Nanoparticle Photoelectrochemistry at a Nanoparticulate TiO2 -Filmed Ultramicroelectrode.

Science.gov (United States)

Peng, Yue-Yi; Ma, Hui; Ma, Wei; Long, Yi-Tao; Tian, He

2018-03-26

An ultrasensitive photoelectrochemical method for achieving real-time detection of single nanoparticle collision events is presented. Using a micrometer-thick nanoparticulate TiO 2 -filmed Au ultra-microelectrode (TiO 2 @Au UME), a sub-millisecond photocurrent transient was observed for an individual N719-tagged TiO 2 (N719@TiO 2 ) nanoparticle and is due to the instantaneous collision process. Owing to a trap-limited electron diffusion process as the rate-limiting step, a random three-dimensional diffusion model was developed to simulate electron transport dynamics in TiO 2 film. The combination of theoretical simulation and high-resolution photocurrent measurement allow electron-transfer information of a single N719@TiO 2 nanoparticle to be quantified at single-molecule accuracy and the electron diffusivity and the electron-collection efficiency of TiO 2 @Au UME to be estimated. This method provides a test for studies of photoinduced electron transfer at the single-nanoparticle level. © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

Photoelectron spectroscopic study on electronic structure of butterfly-templated ZnO

Energy Technology Data Exchange (ETDEWEB)

Kamada, Masao; Sugiyama, Harue; Takahashi, Kazutoshi; Guo, Qixin [Synchrotron Light Application Center, Saga University, Honjo 1, Saga 840-8502 (Japan); Gu, Jiajun; Zhang, Wang; Fan, Tongxiang; Zhang, Di [State Key Laboratory of Metal Matrix Composites, Shanghai Jiaotong University, Shanghai 200030 (China)

2010-06-15

Biological systems have complicated hierarchical architecture involving nano-structures inside, and are expected as another candidate for new nano-templates. The present work reports the photoelectron spectroscopic study on electronic structure of the butterfly-templated ZnO that were successfully produced from butterfly wings. Ultraviolet Photoelectron Spectrum (UPS) of the butterfly-templated ZnO shows clearly the valence band and a Zn-3d peak, indicating that the butterfly-templated ZnO has the same electronic structure as bulk ZnO. However, the details show that the energy positions of the Zn-3d level and the valence-band structure are different between them. The present results indicate that the bonding interaction between Zn-4sp and O-2p orbitals is stronger in the butterfly-templated ZnO, probably due to the nano-structures inside. Important parameters such as band bending and electron affinity are also obtained. The larger band bending and the lower electron affinity are found in the butterfly-templated ZnO (copyright 2010 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Non-condensed (oxo)nitridosilicates: La{sub 3}-[SiN{sub 4}]F and the polymorph o-La{sub 3}-[SiN{sub 3}O]O

Energy Technology Data Exchange (ETDEWEB)

Durach, Dajana; Schnick, Wolfgang [Department of Chemistry, Chair in Inorganic Solid-State Chemistry, University of Munich (LMU) (Germany)

2015-08-15

The isotypic compounds La{sub 3}[SiN{sub 4}]F and La{sub 3}[SiN{sub 3}O]O were synthesized in a radio-frequency furnace at 1600 C. The crystal structures [Pnma (no. 62), Z = 4; La{sub 3}(SiN{sub 4})F: a = 9.970(3), b = 7.697(2), c = 6.897(2) Aa, V = 529.3(3) Aa{sup 3}; La{sub 3}(SiON{sub 3})O: a = 9.950(2), b = 7.6160(15), c = 6.9080(14) Aa, V = 523.48(18) Aa{sup 3}] were elucidated from single-crystal X-ray diffraction data and corroborated by Rietveld refinement, lattice-energy calculations (Madelung part of lattice energy, MAPLE) and Raman/FTIR spectroscopy. Both compounds are homeotypic with Na{sub 2}Pr[GeO{sub 4}]OH forming a network of vertex-sharing FLa{sub 6}/OLa{sub 6} octahedra, whose voids are filled with non-condensed SiN{sub 4}/SiN{sub 3}O tetrahedra. o-La{sub 3}[SiON{sub 3}]O is the orthorhombic polymorph of this compound, which probably represents the high-temperature modification, whereas the tetragonal polymorph t-La{sub 3}[SiON{sub 3}]O represents the low-temperature modification. While the space group of the t-polymorph [I4/mcm (no. 140)] differs from the new La{sub 3}[SiN{sub 4}]F and o-La{sub 3}[SiN{sub 3}O]O, the crystal structure contains the same linking pattern. (Copyright copyright 2015 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Water-Lubricated Intercalation in V2 O5 ·nH2 O for High-Capacity and High-Rate Aqueous Rechargeable Zinc Batteries.

Science.gov (United States)

Yan, Mengyu; He, Pan; Chen, Ying; Wang, Shanyu; Wei, Qiulong; Zhao, Kangning; Xu, Xu; An, Qinyou; Shuang, Yi; Shao, Yuyan; Mueller, Karl T; Mai, Liqiang; Liu, Jun; Yang, Jihui

2018-01-01

Low-cost, environment-friendly aqueous Zn batteries have great potential for large-scale energy storage, but the intercalation of zinc ions in the cathode materials is challenging and complex. Herein, the critical role of structural H 2 O on Zn 2+ intercalation into bilayer V 2 O 5 ·nH 2 O is demonstrated. The results suggest that the H 2 O-solvated Zn 2+ possesses largely reduced effective charge and thus reduced electrostatic interactions with the V 2 O 5 framework, effectively promoting its diffusion. Benefited from the "lubricating" effect, the aqueous Zn battery shows a specific energy of ≈144 Wh kg -1 at 0.3 A g -1 . Meanwhile, it can maintain an energy density of 90 Wh kg -1 at a high power density of 6.4 kW kg -1 (based on the cathode and 200% Zn anode), making it a promising candidate for high-performance, low-cost, safe, and environment-friendly energy-storage devices. © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Occupational noise exposure, hearing loss, and notched audiograms in the HUNT Nord-Trøndelag hearing loss study, 1996-1998.

Science.gov (United States)

Lie, Arve; Engdahl, Bo; Hoffman, Howard J; Li, Chuan-Ming; Tambs, Kristian

2017-06-01

To study the prevalence and usefulness of audiometric notches in the diagnosis of noise-induced hearing loss (NIHL). Audiograms and data on noise exposure from 23,297 men and 26,477 women, aged 20 to 101 years, from the Nord-Trøndelag Hearing Loss Study, 1996-1998. The prevalence of four types of audiometric notches (Coles, Hoffman, Wilson) and 4 kHz notch were computed in relation to occupational noise exposure, age, sex, and report of recurrent ear infections. The prevalence of notches in the 3 to 6 kHz range (Wilson, Hoffman, and Coles) ranged from 50% to 60% in subjects without occupational noise exposure, and 60% to 70% in the most occupationally noise-exposed men. The differences were statistically significant only for bilateral notches. For 4 kHz notches, the prevalence varied from 25% in occupationally nonexposed to 35% in the most occupationally exposed men, and the differences were statistically significant for both bilateral and unilateral notches. For women, the prevalence of notches was lower than in men, especially for 4 kHz notches, and the differences between occupationally noise exposed and nonexposed were smaller. Recreational exposure to high music was not associated with notched audiograms. The detection of bilateral notches and unilateral 4 kHz notches is of some value in diagnosing NIHL, especially in men. 4 Laryngoscope, 127:1442-1450, 2017. © 2016 The Authors. The Laryngoscope published by Wiley Periodicals, Inc. on behalf of American Laryngological, Rhinological and Otological Society Inc, “The Triological Society” and American Laryngological Association (ALA).

The borosulfates K{sub 4}[BS{sub 4}O{sub 15}(OH)], Ba[B{sub 2}S{sub 3}O{sub 13}], and Gd{sub 2}[B{sub 2}S{sub 6}O{sub 24}

Energy Technology Data Exchange (ETDEWEB)

Gross, Peter; Kirchhain, Arno; Hoeppe, Henning A. [Universitaet Augsburg, Institut fuer Physik (Germany)

2016-03-18

K{sub 4}[BS{sub 4}O{sub 15}(OH)], Ba[B{sub 2}S{sub 3}O{sub 13}], and Gd{sub 2}[B{sub 2}S{sub 6}O{sub 24}] were obtained by a new synthetic approach. The strategy involves initially synthesizing the complex acid H[B(HSO{sub 4}){sub 4}] which is subsequently reacted in an open system with anhydrous chlorides of K, Ba, and Gd to the respective borosulfates and a volatile molecule (HCl). Furthermore, protonated borosulfates should be accessible by appropriate stoichiometry of the starting materials, particularly in closed systems, which inhibit deprotonation of H[B(HSO{sub 4}){sub 4}] via condensation and dehydration. This approach led to the successful synthesis of the first divalent and trivalent metal borosulfates (Ba[B{sub 2}S{sub 3}O{sub 13}] with band-silicate topology and Gd{sub 2}[B{sub 2}S{sub 6}O{sub 24}] with cyclosilicate topology) and the first hydrogen borosulfate K{sub 4}[BS{sub 4}O{sub 15}(OH)]. (copyright 2016 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Doping effect on the optical properties of ZnO nanostructures

Energy Technology Data Exchange (ETDEWEB)

Stoehr, M. [Frederick Seitz Materials Research Laboratory, University of Illinois,104 South Goodwin Avenue, Urbana, IL 61801 (United States); Institut Universitaire de Technologie, Universite de Haute Alsace, 61 rue Albert Camus, 68093 Mulhouse Cedex (France); Juillaguet, S. [Groupe d' Etude des Semi-conducteurs, Universite Montpellier II, Place Eugene Bataillon, 34095 Montpellier Cedex 5 (France); Kyaw, T.M.; Wen, J.G. [Institut Universitaire de Technologie, Universite de Haute Alsace, 61 rue Albert Camus, 68093 Mulhouse Cedex (France)

2007-04-15

High quality undoped and Ga{sub 2}O{sub 3} or In{sub 2}O{sub 3} doped ZnO nanostructures are grown by chemical vapor transport and condensation. The doping effect on the optical properties is investigated by photoluminescence. At room temperature, photoluminescence on Ga{sub 2}O{sub 3} doped ZnO nanostructures reveals an enhancement of the ultraviolet near band edge emission at 390 nm, while the intensity of the deep level emission at 530 nm weakens. At 5 K, an intense neutral-donor-bound exciton (D{sup 0}X) line dominates the undoped and doped ZnO photoluminescence spectra. The presence of well resolved two-electron satellite lines allow to determine the type of donors. At 5 K, the results indicate that ZnO nanostructures grown with 10% of Ga{sub 2}O{sub 3} display an excellent optical quality, proved by an intense D{sup 0}X line, a high intensity ratio between the D{sup 0}X line and the deep level emission as well as the presence of numerous phonon replicas of the main lines. (copyright 2007 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Risque de réémergence du paludisme au Maroc Étude de la capacité vectorielle d’Anopheles labranchiae dans une zone rizicole au nord du pays

Directory of Open Access Journals (Sweden)

Faraj C.

2008-12-01

Full Text Available Dans le but d’estimer le risque de réintroduction du paludisme au Maroc, nous avons analysé le potentiel paludogène d’une zone rizicole au nord du pays. Nos résultats ont montré que la capacité vectorielle d’An. labranchiae, vecteur du paludisme au Maroc, était particulièrement élevée pendant la période estivale qui correspond à la période de culture du riz. Le risque d’une reprise de la transmission du paludisme autochtone est élevé du fait de l’éventuelle présence de porteurs de parasite dans le dernier foyer de paludisme limitrophe de la zone d’étude. Le risque d’une introduction du paludisme tropical est faible, vu la faible vulnérabilité de la région et la compétence de ses vecteurs, considérée comme faible. Toutefois, ce risque doit faire l’objet d’une grande attention.

Mn doping in ZnO nanoparticles: effects investigated by positron lifetime and Doppler broadening studies

Energy Technology Data Exchange (ETDEWEB)

Roy, B.; Karmakar, B.; Pal, M. [Department of Physics, University of Burdwan, Golapbag, Burdwan (India); Nambissan, P.M.G. [Saha Institute of Nuclear Physics, Kolkata (India)

2009-11-15

Positron lifetime and Doppler broadening measurements in nanocrystalline zinc oxide (ZnO) indicated the negatively charged trivacancy-type defects V{sub Zn+O+Zn} as the predominant positron trapping sites within the nanocrystallites. They got converted to neutral divacancies (V{sub Zn+O}) on doping with manganese (Mn). Further doping resulted in the reduction of the size of the nanocrystallites. At still increased doping concentrations, a new phase ZnMn{sub 2}O{sub 4} was formed. It had a normal spinel structure with positron trapping centers at some of the tetrahedral and octahedral sites. X-ray diffraction and transmission electron micro-scopy studies confirmed these findings. (copyright 2009 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Timing performance of ZnO:Ga nanopowder composite scintillators

Energy Technology Data Exchange (ETDEWEB)

Turtos, Rosana M. [Universita degli Studi di Milano-Bicocca, Milano (Italy); Gundacker, Stefan; Lucchini, Marco T.; Lecoq, Paul; Auffray, Etiennette [CERN, Geneva (Switzerland); Prochazkova, Lenka; Cuba, Vaclav [Czech Technical University, Faculty of Nuclear Sciences and Physical Engineering, Prague (Czech Republic); Buresova, Hana [Nuvia a.s, Kralupy nad Vltavou (Czech Republic); Mrazek, Jan [Institute of Photonics and Electronics AS CR, Prague (Czech Republic); Nikl, Martin [Institute of Physics of the AS CR, Prague (Czech Republic)

2016-11-15

The implementation of nanocrystal-based composite scintillators as a new generation of ultrafast particle detectors is explored using ZnO:Ga nanopowder. Samples are characterized with a spectral-time resolved photon counting system and pulsed X-rays, followed by coincidence time resolution (CTR) measurements under 511 keV gamma excitation. Results are comparable to CTR values obtained using bulk inorganic scintillators. Bringing the ZnO:Ga nanocrystal's timing performance to radiation detectors could pave the research path towards sub-20 ps time resolution as shown in this contribution. However, an efficiency boost when placing nanopowders in a transparent host constitutes the main challenge in order to benefit from sub-nanosecond recombination times. (copyright 2016 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Self-Assembled Amphiphilic Water Oxidation Catalysts: Control of O-O Bond Formation Pathways by Different Aggregation Patterns.

Science.gov (United States)

Yang, Bing; Jiang, Xin; Guo, Qing; Lei, Tao; Zhang, Li-Ping; Chen, Bin; Tung, Chen-Ho; Wu, Li-Zhu

2016-05-17

The oxidation of water to molecular oxygen is the key step to realize water splitting from both biological and chemical perspective. In an effort to understand how water oxidation occurs on a molecular level, a large number of molecular catalysts have been synthesized to find an easy access to higher oxidation states as well as their capacity to make O-O bond. However, most of them function in a mixture of organic solvent and water and the O-O bond formation pathway is still a subject of intense debate. Herein, we design the first amphiphilic Ru-bda (H2 bda=2,2'-bipyridine-6,6'-dicarboxylic acid) water oxidation catalysts (WOCs) of formula [Ru(II) (bda)(4-OTEG-pyridine)2 ] (1, OTEG=OCH2 CH2 OCH2 CH2 OCH3 ) and [Ru(II) (bda)(PySO3 Na)2 ] (2, PySO3 (-) =pyridine-3-sulfonate), which possess good solubility in water. Dynamic light scattering (DLS), scanning electron microscope (SEM), critical aggregation concentration (CAC) experiments and product analysis demonstrate that they enable to self-assemble in water and form the O-O bond through different routes even though they have the same bda(2-) backbone. This work illustrates for the first time that the O-O bond formation pathway can be regulated by the interaction of ancillary ligands at supramolecular level. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Hydrothermal synthesis and crystal structures of Na{sub 2}Be{sub 3}(SeO{sub 3}){sub 4}.H{sub 2}O and Cs{sub 2}[Mg(H{sub 2}O){sub 6}]{sub 3}(SeO{sub 3}){sub 4}

Energy Technology Data Exchange (ETDEWEB)

Shen, Chen; Mei, Dajiang; Sun, Chuanling; Liu, Yunsheng; Wu, Yuandong [College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science (China)

2017-09-04

The selenites, Na{sub 2}Be{sub 3}(SeO{sub 3}){sub 4}.H{sub 2}O and Cs{sub 2}[Mg(H{sub 2}O){sub 6}]{sub 3}(SeO{sub 3}){sub 4}, were synthesized under hydrothermal conditions. The crystal structures of Na{sub 2}Be{sub 3}(SeO{sub 3}){sub 4}.H{sub 2}O and Cs{sub 2}[Mg(H{sub 2}O){sub 6}]{sub 3}(SeO{sub 3}){sub 4} were determined by single-crystal X-ray diffractions. Na{sub 2}Be{sub 3}(SeO{sub 3}){sub 4}.H{sub 2}O crystallizes in the triclinic space group P1 (no. 2) with unit cell parameters a = 4.8493(9), b = 12.013(2), c = 12.077(2) Aa, and Z = 2, whereas Cs{sub 2}[Mg(H{sub 2}O){sub 6}]{sub 3}(SeO{sub 3}){sub 4} crystallizes in the monoclinic space group C2/m (no. 12) with lattice cell parameters a = 12.596(6), b = 7.297(4), c = 16.914(8) Aa, and Z = 2. Na{sub 2}Be{sub 3}(SeO{sub 3}){sub 4}.H{sub 2}O features a three-dimensional open framework structure formed by BeO{sub 4} tetrahedra and SeO{sub 3} trigonal pyramids. Na cations and H{sub 2}O molecules are located in different tunnels. Cs{sub 2}[Mg(H{sub 2}O){sub 6}]{sub 3}(SeO{sub 3}){sub 4} has a structure composed of isolated [Mg(H{sub 2}O){sub 6}] octahedra and SeO{sub 3} trigonal pyramids interacted by hydrogen bonds, and Cs cations are resided in-between. Both compounds were characterized by thermogravimetric analysis and FT-IR spectroscopy. (copyright 2017 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Luminescence, scintillation, and energy transfer in SiO{sub 2}-Al{sub 2}O{sub 3}-B{sub 2}O{sub 3}-Gd{sub 2}O{sub 3}:Ce{sup 3+},Pr{sup 3+} glasses

Energy Technology Data Exchange (ETDEWEB)

Lertloypanyachai, Prapon; Chewpraditkul, Weerapong; Pattanaboonmee, Nakarin [Department of Physics, King Mongkut' s University of Technology Thonburi, Bangkok (Thailand); Chen, Danping [Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai (China); Babin, Vladimir; Beitlerova, Alena; Nikl, Martin [Institute of Physics, AS CR, Prague (Czech Republic)

2017-09-15

Ce{sup 3+},Pr{sup 3+}-codoped SiO{sub 2}-Al{sub 2}O{sub 3}-B{sub 2}O{sub 3}-Gd{sub 2}O{sub 3} glasses (SABG:Ce,Pr) were prepared by melt quenching under a CO reducing atmosphere. Luminescence properties were investigated under UV and X-ray excitations. A dominant emission band at 430 nm belonging to the Ce{sup 3+}:5d{sub 1} → 4f transition was observed in the photo- and radio-luminescence spectra. The energy transfer occurs from this Ce{sup 3+} band toward the {sup 3}P{sub J} levels of Pr{sup 3+} with an efficiency of up to 24%, followed by the reduction of integrated luminescence intensity with an increasing Pr{sup 3+} concentration. This result is attributed to the increase in the reabsorption of Ce{sup 3+} luminescence and the non-radiative energy transfer toward the {sup 3}P{sub J} levels of Pr{sup 3+}. The cross-relaxation process within the Pr{sup 3+} pairs can further diminish the total luminescence yield at high Pr{sup 3+} concentrations. The integral scintillation efficiency and light yield measurements were carried out and compared to the reference Bi{sub 4}Ge{sub 3}O{sub 12} (BGO) crystal. (copyright 2017 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Intramolecular Oxidative O-Demethylation of an Oxoferryl Porphyrin Complexed with a Per-O-methylated β-Cyclodextrin Dimer.

Science.gov (United States)

Kitagishi, Hiroaki; Kurosawa, Shun; Kano, Koji

2016-11-22

The intramolecular oxidation of ROCH 3 to ROCH 2 OH, where the latter compound spontaneously decomposed to ROH and HCHO, was observed during the reaction of the supramolecular complex (met-hemoCD3) with cumene hydroperoxide in aqueous solution. Met-hemoCD3 is composed of meso-tetrakis(4-sulfonatophenyl)porphinatoiron(III) (Fe III TPPS) and a per-O-methylated β-cyclodextrin dimer having an -OCH 2 PyCH 2 O- linker (Py=pyridine-3,5-diyl). The O=Fe IV TPPS complex was formed by the reaction of met-hemoCD3 with cumene hydroperoxide, and isolated by gel-filtration chromatography. Although the isolated O=Fe IV TPPS complex in the cyclodextrin cage was stable in aqueous solution at 25 °C, it was gradually converted to Fe II TPPS (t 1/2 =7.6 h). This conversion was accompanied by oxidative O-demethylation of an OCH 3 group in the cyclodextrin dimer. The results indicated that hydrogen abstraction by O=Fe IV TPPS from ROCH 3 yields HO-Fe III TPPS and ROCH 2 . . This was followed by radical coupling to afford Fe II TPPS and ROCH 2 OH. The hemiacetal (ROCH 2 OH) immediately decomposed to ROH and HCHO. This study revealed the ability of oxoferryl porphyrin to induce two-electron oxidation. © 2016 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

Atomic absorption photometry of excess Zn in ZnO

Energy Technology Data Exchange (ETDEWEB)

Lott, K.; Shinkarenko, S.; Tuern, L. [Department of Materials Science, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn (Estonia); Kirsanova, T.; Grebennik, A.; Vishnjakov, A. [Department of Physical Chemistry, D. Mendelejev University of Chemical Technology of Russia, Miusskaya Sq. 9, 125047 Moscow (Russian Federation)

2005-02-01

Zn excess in ZnO is built up automatically at high temperatures. Excess Zn in hydrothermally grown ZnO single crystals were investigated by the atomic absorption photometry (AAP) method. To determine the excess zinc in ZnO samples, the AAP of zinc vapour was used in the conditions of solid-vapour equilibrium. Zn AAP allowed to eliminate excess Zn connected differentially in ZnO samples. To fix Zn non-stoichiometry, all the ZnO samples tested were previously heat treated at temperature interval from 850 to 900 C and at fixed Zn vapour pressures from 0.1 to 0.9 of saturated zinc vapour pressure at given treatment temperature. The analysis of temperature dependence of zinc vapour pressure indicated that the impurity metals take active role in the determination of non-stoichiometric zinc. The impurities Mn, Fe, Co, Ni and Cu form oxides which will reduce during annealing in Zn vapor up to metals form. During AAP measurement in optical cuvette, these metals react with ZnO and give additional Zn vapor pressure. (copyright 2005 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

B{sub 2}S{sub 2}O{sub 9}. A boron sulfate with phyllosilicate topology

Energy Technology Data Exchange (ETDEWEB)

Logemann, Christian; Wickleder, Mathias S. [Carl von Ossietzky University, Institute for Chemistry, Oldenburg (Germany)

2013-12-23

The condensation of [BO{sub 4}] and [SO{sub 4}] tetrahedra in the first binary boron sulfate B{sub 2}S{sub 2}O{sub 9}, leads to a structure with typical layered phyllosilicate topology. The compound is obtained from the hydrolysis of B(OH){sub 3} and HSO{sub 3}Cl. (Copyright copyright 2013 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

LiNbO3 :Pr3+ : A Multipiezo Material with Simultaneous Piezoelectricity and Sensitive Piezoluminescence.

Science.gov (United States)

Tu, Dong; Xu, Chao-Nan; Yoshida, Akihito; Fujihala, Masayoshi; Hirotsu, Jou; Zheng, Xu-Guang

2017-06-01

Red-emitting piezoluminescence (elasticoluminescence) is achieved by doping rare earth Pr 3+ into the well-known piezoelectric matrix, LiNbO 3 . By precisely tuning the Li/Nb ratio in nonstoichiometric Li x NbO 3 :Pr 3+ , a material that exhibits an unusually high piezoluminescence intensity, which far exceeds that of any well-known piezoelectric material, is produced. Li x NbO 3 :Pr 3+ shows excellent strain sensitivity at the lowest strain level, with no threshold for stress sensing. These multipiezo properties of sensitive piezoluminescence in a piezoelectric matrix are ideal for microstress sensing, damage diagnosis, electro-mechano-optical energy conversion, and multifunctional control in optoelectronics. © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Norwegian computers in European energy research project

International Nuclear Information System (INIS)

Anon.

1979-01-01

16 NORD computers have been ordered for the JET data acquisition and storage system. The computers will be arranged in a 'double star' configuration, developed by CERN. Two control consoles each have their own computer. All computers for communication, control, diagnostics, consoles and testing are NORD-100s while the computer for data storage and analysis is a NORD-500. The operating system is SINTRAN CAMAC SERIAL HIGHWAY with fibre optics to be used for long communications paths. The programming languages FORTRAN, NODAL, NORD PL, PASCAL and BASIC may be used. The JET project and TOKAMAK type machines are briefly described. (JIW)

Epitaxial growth of branched {alpha}-Fe{sub 2}O{sub 3}/SnO{sub 2} nano-heterostructures with improved lithium-ion battery performance

Energy Technology Data Exchange (ETDEWEB)

Zhou, Weiwei; Cheng, Chuanwei; Jia, Xingtao; Yu, Ting; Fan, Hong Jin [Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371 (Singapore); Liu, Jinping; Jiang, Jian [Institute of Nanoscience and Nanotechnology, Department of Physics, Huazhong Normal University, Wuhan 430079 (China); Tay, Yee Yan; Hng, Huey Hoon [School of Materials Science and Engineering, Nanyang Technological University, 639798 (Singapore); Zhang, Jixuan; Gong, Hao [Department of Materials Science and Engineering, National University of Singapore, 117576 (Singapore)

2011-07-08

We report the synthesis of a novel branched nano-heterostructure composed of SnO{sub 2} nanowire stem and {alpha}-Fe{sub 2}O{sub 3} nanorod branches by combining a vapour transport deposition and a facile hydrothermal method. The epitaxial relationship between the branch and stem is investigated by high resolution transmission electron microscopy (HRTEM). The SnO{sub 2} nanowire is determined to grow along the [101] direction, enclosed by four side surfaces. The results indicate that distinct crystallographic planes of SnO{sub 2} stem can induce different preferential growth directions of secondary nanorod branches, leading to six-fold symmetry rather than four-fold symmetry. Moreover, as a proof-of-concept demonstration of the function, such {alpha}-Fe{sub 2}O{sub 3}/SnO{sub 2} composite material is used as a lithium-ion batteries (LIBs) anode material. Low initial irreversible loss and high reversible capacity are demonstrated, in comparison to both single components. The synergetic effect exerted by SnO{sub 2} and {alpha}-Fe{sub 2}O{sub 3} as well as the unique branched structure are probably responsible for the enhanced performance. (Copyright copyright 2011 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Ab initio calculations of PbTiO{sub 3}/SrTiO{sub 3} (001) heterostructures

Energy Technology Data Exchange (ETDEWEB)

Eglitis, R.I.; Piskunov, S.; Zhukovskii, Yu.F. [Institute of Solid State Physics, University of Latvia, 8 Kengaraga Str., 1063 Riga (Latvia)

2016-12-15

We performed ab initio calculations for the PbTiO{sub 3}/SrTiO{sub 3} (001) heterostructures. For both PbO and TiO{sub 2}-terminations of the PbTiO{sub 3} (001) thin film, augmented on the SrTiO{sub 3} (001) substrate, the magnitudes of atomic relaxations Δz increases as a function of the number of augmented monolayers. For both terminations of the augmented PbTiO{sub 3} (001) nanothin film, all upper, third and fifth monolayers are displaced inwards (Δz is negative), whereas all second, fourth and sixth monolayers are displaced outwards (Δz is positive). The B3PW calculated PbTiO{sub 3}/SrTiO{sub 3} (001) heterostructure band gaps, independently from the number of augmented layers, are always smaller than the PbTiO{sub 3} and SrTiO{sub 3} bulk band gaps. For both PbO and TiO{sub 2}-terminated PbTiO{sub 3}/SrTiO{sub 3}(001) heterostructures, their band gaps are reduced due to the increased number of PbTiO{sub 3} (001) monolayers. The band gaps of PbO-terminated augmented PbTiO{sub 3} (001) films are always larger than those for TiO{sub 2}-terminated PbTiO{sub 3} (001) thin films. The only exception is the case of 7-layer PbO-terminated and 8-layer TiO{sub 2}-terminated augmented PbTiO{sub 3} (001) thin films, where their band gaps both are equal to 2.99 eV. For each monolayer of the SrTiO{sub 3} (001) substrate, charge magnitudes always are more than several times larger, than for each monolayer in the augmented PbTiO{sub 3} (001) thin film. (copyright 2016 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Enzymatic Synthesis of Acylphloroglucinol 3-C-Glucosides from 2-O-Glucosides using a C-Glycosyltransferase from Mangifera indica.

Science.gov (United States)

Chen, Dawei; Sun, Lili; Chen, Ridao; Xie, Kebo; Yang, Lin; Dai, Jungui

2016-04-18

A green and cost-effective process for the convenient synthesis of acylphloroglucinol 3-C-glucosides from 2-O-glucosides was exploited using a novel C-glycosyltransferase (MiCGTb) from Mangifera indica. Compared with previously characterized CGTs, MiCGTb exhibited unique de-O-glucosylation promiscuity and high regioselectivity toward structurally diverse 2-O-glucosides of acylphloroglucinol and achieved high yields of C-glucosides even with a catalytic amount of uridine 5'-diphosphate (UDP). These findings demonstrate for the first time the significant potential of a single-enzyme approach to the synthesis of bioactive C-glucosides from both natural and unnatural acylphloroglucinol 2-O-glucosides. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Aqueous chemical growth and patterning of ZnO nanopillars on different substrate materials

Energy Technology Data Exchange (ETDEWEB)

Kreye, M.; Postels, B.; Wehmann, H.H.; Waag, A. [Institute of Semiconductor Technology, Technical University of Braunschweig, Hans-Sommer-Strasse 66, 38106 Braunschweig (Germany); Fuhrmann, D.; Hangleiter, A. [Institute of Applied Physics, Technical University of Braunschweig, Mendelssohnstrasse 2, 38106 Braunschweig (Germany)

2006-03-15

Aqueous chemical growth (ACG) is a low-temperature approach that is only weakly influenced by the substrate and allows for the growth of ZnO nanopillars on various substrates. ACG is an efficient way to generate wafer-scale and densely packed arrays of ZnO nanopillars even on polymer materials. Photoluminescence (PL) characterisation clearly shows a comparatively strong band-edge luminescence even at room temperature that is accompanied with a rather weak visible luminescence in the yellow/orange spectral range. We introduce a rather simple postgrowth lithographic technique. Patterning of ZnO nanopillars even on layered conducting and flexible substrate materials using ACG as a low-temperature growth technique is demonstrated. The economical potential for future applications and devices using ZnO nanopillar arrays is discussed. (copyright 2006 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Hierarchical hollow spheres of Fe2O3 @polyaniline for lithium ion battery anodes.

Science.gov (United States)

Jeong, Jae-Min; Choi, Bong Gill; Lee, Soon Chang; Lee, Kyoung G; Chang, Sung-Jin; Han, Young-Kyu; Lee, Young Boo; Lee, Hyun Uk; Kwon, Soonjo; Lee, Gaehang; Lee, Chang-Soo; Huh, Yun Suk

2013-11-20

Hierarchical hollow spheres of Fe2 O3 @polyaniline are fabricated by template-free synthesis of iron oxides followed by a post in- and exterior construction. A combination of large surface area with porous structure, fast ion/electron transport, and mechanical integrity renders this material attractive as a lithium-ion anode, showing superior rate capability and cycling performance. © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

L’analyse des métaphores et les modèles de la métropole nord-américaine : débat et proposition

Directory of Open Access Journals (Sweden)

Gilles Sénécal

2008-09-01

Full Text Available Cet article passe en revue les différents modèles, depuis celui de l’école de Chicago jusqu’à celui de l’école de Los Angeles, qui représentent la forme des métropoles nord-américaines. L’analyse des métaphores, tant écologique ou gravitaire, que celles de la géographie des espaces-temps, des scènes urbaines ou du jeu keno, permet de revoir les termes du débat opposant le modèle gravitaire à celui de la métropole fragmentée. Deux questions sont ici soulevées. La première concerne l’unité des études urbaines contenue dans le modèle écologique, c’est-à-dire sa capacité de traiter de l’organisation de l’espace métropolitain et des interactions sociales réalisées à l’échelle du lieu. La seconde traite de la mobilité des personnes, c’est-à-dire de la relation entre l’organisation de l’espace métropolitain et l’espace vécu des individus. Deux constats se dégagent de l’analyse. Le premier est pour reconnaître le caractère inachevé de l’urbanisme postmoderne. La seconde souligne l’absence d’une métaphore de substitution pouvant  rendre compte de manière générale de la forme métropoles nord-américaines contemporaines. Face à quoi, il est proposé de s’inspirer de la théorie des cordes en sciences physiques.This paper reviews the various models representing the form of the North American metropolis, starting from the School of Chicago up to the School of Los Angeles. It examines a series of metaphors ranging from the ecological to the gravitational, as well as space-time geography, urban scene or the game Keno with the aim of reconsidering the terms of debate regarding the contrasts between the gravitational and the fragmented metropolis models. Two questions are raised. The first involves urban studies’ unity in the ecological model i.e. its capacity to consider the organization of metropolitan space and place-level social interactions. The second deals with the issue of

Education-based health inequalities in 18,000 Norwegian couples: the Nord-Trøndelag Health Study (HUNT

Directory of Open Access Journals (Sweden)

Nilsen Sara

2012-11-01

Full Text Available Abstract Background Education-based inequalities in health are well established, but they are usually studied from an individual perspective. However, many individuals are part of a couple. We studied education-based health inequalities from the perspective of couples where indicators of health were measured by subjective health, anxiety and depression. Methods A sample of 35,980 women and men (17,990 couples was derived from the Norwegian Nord-Trøndelag Health Study 1995–97 (HUNT 2. Educational data and family identification numbers were obtained from Statistics Norway. The dependent variables were subjective health (four-integer scale, anxiety (21-integer scale and depression (21-integer scale, which were captured using the Hospital Anxiety and Depression Scale. The dependent variables were rescaled from 0 to 100 where 100 was the worst score. Cross-sectional analyses were performed using two-level linear random effect regression models. Results The variance attributable to the couple level was 42% for education, 16% for subjective health, 19% for anxiety and 25% for depression. A one-year increase in education relative to that of one’s partner was associated with an improvement of 0.6 scale points (95% confidence interval = 0.5–0.8 in the subjective health score (within-couple coefficient. A one-year increase in a couple’s average education was associated with an improvement of 1.7 scale points (95% confidence interval = 1.6–1.8 in the subjective health score (between-couple coefficient. There were no education-based differences in the anxiety or depression scores when partners were compared, whereas there were substantial education-based differences between couples in all three outcome measures. Conclusions We found considerable clustering of education and health within couples, which highlighted the importance of the family environment. Our results support previous studies that report the mutual effects of spouses on

A permselective CeO{sub x} coating to improve the stability of oxygen evolution electrocatalysts

Energy Technology Data Exchange (ETDEWEB)

Obata, Keisuke; Takanabe, Kazuhiro [King Abdullah University of Science and Technology (KAUST), KAUST Catalysis Center (KCC) and Physical Sciences and Engineering Division PSE, Thuwal (Saudi Arabia)

2018-02-05

Highly active NiFeO{sub x} electrocatalysts for the oxygen evolution reaction (OER) suffer gradual deactivation with time owing to the loss of Fe species from the active sites into solution during catalysis. The anodic deposition of a CeO{sub x} layer prevents the loss of such Fe species from the OER catalysts, achieving a highly stable performance. The CeO{sub x} layer does not affect the OER activity of the catalyst underneath but exhibits unique permselectivity, allowing the permeation of OH{sup -} and O{sub 2} through while preventing the diffusion of redox ions through the layer to function as a selective O{sub 2}-evolving electrode. The use of such a permselective protective layer provides a new strategy for improving the durability of electrocatalysts. (copyright 2018 Wiley-VCH Verlag GmbH and Co. KGaA, Weinheim)

Simultaneous carbonation and sulfation of CaO in Oxy-Fuel CFB combustion

Energy Technology Data Exchange (ETDEWEB)

Wang, C. [School of Energy and Power Engineering, North China Electric Power University, Baoding City, Hebei Province (China); Jia, L.; Tan, Y. [CanmetENERGY, 1 Haanel Drive, Ottawa, Ontario, K1A 1M1 (Canada)

2011-10-15

For anthracites and petroleum cokes, the typical combustion temperature in a circulating fluidized bed (CFB) is > 900 C. At CO{sub 2} concentrations of 80-85 % (typical of oxy-fuel CFBC conditions), limestone still calcines. When the ash which includes unreacted CaO cools to the calcination temperature, carbonation of fly ash deposited on cool surfaces may occur. At the same time, indirect and direct sulfation of limestone also will occur, possibly leading to more deposition. In this study, CaO was carbonated and sulfated simultaneously in a thermogravimetric analyzer (TGA) under conditions expected in an oxy-fuel CFBC. It was found that temperature, and concentrations of CO{sub 2}, SO{sub 2}, and especially H{sub 2}O are important factors in determining the carbonation/sulfation reactions of CaO. (Copyright copyright 2011 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Multiphonon scattering and non-radiative decay in ZnO nanoparticles

Energy Technology Data Exchange (ETDEWEB)

Senthilkumar, K.; Tokunaga, M.; Okamoto, H.; Fujita, Y. [Interdisciplinary Faculty of Science and Engineering, Shimane University, Matsue 690-8504 (Japan); Senthilkumar, O. [Research Project Promotion Institute, Shimane University, Matsue 690-8504 (Japan); Lin, J.; Urban, B.; Neogi, A. [Department of Physics, University of North Texas, Denton 76203 (United States)

2010-06-15

ZnO nanoparticles were prepared using a simple evaporation technique at pressures of 75 and 760 torr. A wide visible emission was recorded from both samples using photoluminescence spectroscopy. The presence of green emission at 530 nm is due to deep level defects of vacant zinc V{sub Zn}, and/or their complexes in the ZnO band gap. The fundamental optical phonon modes were identified in addition to multiphonon combination of optical and acoustical overtones and nitrogen related local vibrational modes using Raman backscattering. The existence of multiphonons induces the non-radiative processes. The life time of both the radiative and non-radiative processes is discussed using time resolved photoluminescence spectroscopic results (copyright 2010 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Enhanced dielectric properties of thin Ta{sub 2}O{sub 5} films grown on 65 nm SiO{sub 2}/Si

Energy Technology Data Exchange (ETDEWEB)

Kolkovsky, Vl.; Kurth, E.; Kunath, C. [IPMS Fraunhofer, Dresden, Maria-Reiche Str. 2, 01109 Dresden (Germany)

2016-12-15

The structural and electrical properties of Ta{sub 2}O{sub 5}/65 nm SiO{sub 2} structures with different thicknesses of Ta{sub 2}O{sub 5} varying in the range of 0-260 nm are investigated. We find that the stack structures grown by the magnetron sputtering technique and annealed at 1220 K in O and Ar atmosphere show one of the highest dielectric constant of Ta{sub 2}O{sub 5}(about 64) among those previously reported in the literature. The structure of the annealed polycrystalline Ta{sub 2}O{sub 5} films is orthorhombic, as obtained from X-ray diffraction measurements and we do not observe any preferential orientation of the annealed films. The Ta{sub 2}O{sub 5} films contain positively charged defects which become mobile at around 400 K and they are tentatively correlated with the oxygen vacancies. The leakage current in the stack structures is a factor of 20 higher compared to that in thin layers with 65 nm SiO{sub 2}. The conduction mechanism in the stack structures can be described by the Fowler-Nordheim model with a barrier height that decreases slightly (<10%) as a function of the thickness of the films. (copyright 2016 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Measurement of absorption spectrum of deuterium oxide (D2O) and its application to signal enhancement in multiphoton microscopy at the 1700-nm window

International Nuclear Information System (INIS)

Wang, Yuxin; Wen, Wenhui; Wang, Kai; Wang, Ke; Zhai, Peng; Qiu, Ping

2016-01-01

1700-nm window has been demonstrated to be a promising excitation window for deep-tissue multiphoton microscopy (MPM). Long working-distance water immersion objective lenses are typically used for deep-tissue imaging. However, absorption due to immersion water at 1700 nm is still high and leads to dramatic decrease in signals. In this paper, we demonstrate measurement of absorption spectrum of deuterium oxide (D 2 O) from 1200 nm to 2600 nm, covering the three low water-absorption windows potentially applicable for deep-tissue imaging (1300 nm, 1700 nm, and 2200 nm). We apply this measured result to signal enhancement in MPM at the 1700-nm window. Compared with water immersion, D 2 O immersion enhances signal levels in second-harmonic generation imaging, 3-photon fluorescence imaging, and third-harmonic generation imaging by 8.1, 24.8, and 24.7 times with 1662-nm excitation, in good agreement with theoretical calculation based on our absorption measurement. This suggests D 2 O a promising immersion medium for deep-tissue imaging

Electric-field-induced internal deformation in piezoelectric BiB{sub 3}O{sub 6} crystals

Energy Technology Data Exchange (ETDEWEB)

Schmidt, O.; Gorfman, S.; Pietsch, U. [Solid State Physics Department, University of Siegen (Germany)

2008-11-15

For the first time electric-field-induced atomic displacements (internal strains) in non-ferroelectric polar BiB{sub 3}O{sub 6} single crystal plates (point symmetry 2) were investigated using X-ray diffraction technique. The intensity variations of selected Bragg reflections were collected for three different orientations of the applied external electric field vector with respect to the crystal lattice and used for calculating the microscopic structural response of BiB{sub 3}O{sub 6}. Due to the limited number of the reflections providing measurable changes in Bragg intensities we restricted ourselves in analyzing the shift of the B{sub 3}O{sub 6} sublattice relative to the Bi one. In addition, we considered the deformation of the Bi-O, B(1)-O and B(2)-O bond lengths and identified the [B(2)O{sub 3}] group as the most sensitive structural unit to an external electric perturbation. (copyright 2008 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Tailoring Colors by O Annulation of Polycyclic Aromatic Hydrocarbons.

Science.gov (United States)

Miletić, Tanja; Fermi, Andrea; Orfanos, Ioannis; Avramopoulos, Aggelos; De Leo, Federica; Demitri, Nicola; Bergamini, Giacomo; Ceroni, Paola; Papadopoulos, Manthos G; Couris, Stelios; Bonifazi, Davide

2017-02-16

The synthesis of O-doped polyaromatic hydro- carbons in which two polycyclic aromatic hydrocarbon sub units are bridged through one or two O atoms has been achieved. This includes high-yield ring-closure key steps that, depending on the reaction conditions, result in the formation of furanyl or pyranopyranyl linkages through intramolecular C-O bond formation. Comprehensive photophysical measurements in solution showed that these compounds have exceptionally high emission yields and tunable absorption properties throughout the UV/Vis spectral region. Electrochemical investigations showed that in all cases O annulation increases the electron-donor capabilities by raising the HOMO energy level, whereas the LUMO energy level is less affected. Moreover, third-order nonlinear optical (NLO) measurements on solutions or thin films containing the dyes showed very good values of the second hyperpolarizability. Importantly, poly(methyl methacrylate) films containing the pyranopyranyl derivatives exhibited weak linear absorption and NLO absorption compared to the nonlinearity and NLO refraction, respectively, and thus revealed them to be exceptional organic materials for photonic devices. © 2016 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA.

Effect of La doping on interface barrier between Si-passivated Ge and insulating HfO{sub 2}

Energy Technology Data Exchange (ETDEWEB)

Kolomiiets, Nadiia M.; Afanas' ev, Valery V.; Madia, Oreste; Stesmans, Andre [Department of Physics and Astronomy, University of Leuven, Celestijnenlaan 200D, 3001 Leuven (Belgium); Cott, Daire J.; Collaert, Nadine [Imec, Kapeldreef 75, 3001 Leuven (Belgium); Thean, Aaron [Imec, Kapeldreef 75, 3001 Leuven (Belgium); National University of Singapore (Singapore)

2016-12-15

By analyzing internal photoemission of electrons from Si/SiO{sub x}-passivated Ge into insulating HfO{sub 2} we found that insertion of additional La interlayer between SiO{sub x} and HfO{sub 2} leads to dramatic increase (more than by factor of 20) of the barrier transparency. However, no measurable variation of the interface barrier height is observed suggesting that La induces intermixing of near-interface oxide stack resulting in development of additional density of states corresponding to conduction band of LaO{sub x} and HfO{sub x} sub-networks. At the same time, photoemission results indicate the presence of discrete positive charges in the near-interface oxide layer which may explain the observed ∝1 V shift of capacitance-voltage curves. (copyright 2016 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Avaliação nutricional e energética do farelo de girassol para aves Nutritional and energetic evaluation of sunflower meal in broiler diets

Directory of Open Access Journals (Sweden)

F.C. Tavernari

2010-02-01

Full Text Available Foram realizados dois ensaios de metabolismo a fim de determinar a energia metabolizável aparente (EMA, por meio do método de coleta total de excretas com frangos, e a energia metabolizável verdadeira (EMV e a digestibilidade verdadeira dos aminoácidos do farelo de girassol, por meio do método de alimentação forçada com galos cecectomizados. No primeiro ensaio, foi utilizado o delineamento experimental inteiramente ao acaso com 80 frangos Cobb, distribuídos em dois tratamentos, ração referência (RR e RR mais 20% de inclusão de farelo de girassol e oito repetições e cinco aves por unidade experimental. No segundo ensaio, foi utilizado o delineamento experimental inteiramente ao acaso com 14 galos Leghorn, distribuídos em dois tratamentos, farelo de girassol e jejum, sete repetições e um galo por unidade experimental. O farelo de girassol apresentou 90,0% de matéria seca, 28,1% de proteína bruta, 4.42kcal/kg de energia bruta, 22,4% de fibra bruta, 2,9% de extrato etéreo, 0,8% de fósforo e 0,3% de cálcio. A EMV, a EMV corrigida, a EMA e a EMA corrigida determinadas foram 3.013; 2.200; 2.141 e 1.983kcal/kg, respectivamente. A lisina foi o aminoácido essencial que apresentou a menor digestibilidade e a arginina, a maior.Two experiments were carried out to determine apparent metabolizable energy (AME, by the method of total excreta collection using broilers; and true metabolizable energy (TME and true amino acid digestibility of sunflower meal (SFM, by the method of forced feeding using cecectomized roosters. In the first experiment, a completely randomized experimental design, with two treatments (reference diet (RD and RD plus 20% SFM inclusion with eight replicates of five birds each, was applied. In the second experiment, a completely randomized experimental design, with two treatments (SFM vs. fasting with seven replicates of one rooster each, was used. Sunflower meal presented 90,0% dry matter, 28.1% crude protein, 4

Thermally Stable TiO2 - and SiO2 -Shell-Isolated Au Nanoparticles for In Situ Plasmon-Enhanced Raman Spectroscopy of Hydrogenation Catalysts.

Science.gov (United States)

Hartman, Thomas; Weckhuysen, Bert M

2018-03-12

Raman spectroscopy is known as a powerful technique for solid catalyst characterization as it provides vibrational fingerprints of (metal) oxides, reactants, and products. It can even become a strong surface-sensitive technique by implementing shell-isolated surface-enhanced Raman spectroscopy (SHINERS). Au@TiO 2 and Au@SiO 2 shell-isolated nanoparticles (SHINs) of various sizes were therefore prepared for the purpose of studying heterogeneous catalysis and the effect of metal oxide coating. Both SiO 2 - and TiO 2 -SHINs are effective SHINERS substrates and thermally stable up to 400 °C. Nano-sized Ru and Rh hydrogenation catalysts were assembled over the SHINs by wet impregnation of aqueous RuCl 3 and RhCl 3 . The substrates were implemented to study CO adsorption and hydrogenation under in situ conditions at various temperatures to illustrate the differences between catalysts and shell materials with SHINERS. This work demonstrates the potential of SHINS for in situ characterization studies in a wide range of catalytic reactions. © 2018 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA.

Solar Thermochemical Energy Storage Through Carbonation Cycles of SrCO3/SrO Supported on SrZrO3.

Science.gov (United States)

Rhodes, Nathan R; Barde, Amey; Randhir, Kelvin; Li, Like; Hahn, David W; Mei, Renwei; Klausner, James F; AuYeung, Nick

2015-11-01

Solar thermochemical energy storage has enormous potential for enabling cost-effective concentrated solar power (CSP). A thermochemical storage system based on a SrO/SrCO3 carbonation cycle offers the ability to store and release high temperature (≈1200 °C) heat. The energy density of SrCO3/SrO systems supported by zirconia-based sintering inhibitors was investigated for 15 cycles of exothermic carbonation at 1150 °C followed by decomposition at 1235 °C. A sample with 40 wt % of SrO supported by yttria-stabilized zirconia (YSZ) shows good energy storage stability at 1450 MJ m(-3) over fifteen cycles at the same cycling temperatures. After further testing over 45 cycles, a decrease in energy storage capacity to 1260 MJ m(-3) is observed during the final cycle. The decrease is due to slowing carbonation kinetics, and the original value of energy density may be obtained by lengthening the carbonation steps. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Self-Template Synthesis of Hybrid Porous Co3 O4 -CeO2 Hollow Polyhedrons for High-Performance Supercapacitors.

Science.gov (United States)

Wei, Chengzhen; Liu, Kangfei; Tao, Jing; Kang, Xiaoting; Hou, Haiyan; Cheng, Cheng; Zhang, Daojun

2018-01-04

In this work, hybrid porous Co 3 O 4 -CeO 2 hollow polyhedrons have been successfully obtained via a simple cation-exchange route followed by heat treatment. In the synthesis process, ZIF-67 polyhedron frameworks are firstly prepared, which not only serve as a host for the exchanged Ce3 + ions but also act as the template for the synthesis of hybrid porous Co 3 O 4 -CeO 2 hollow polyhedrons. When utilized as electrode materials for supercapacitors, the hybrid porous Co 3 O 4 -CeO 2 hollow polyhedrons delivered a large specific capacitance of 1288.3 F g -1 at 2.5 A g -1 and a remarkable long lifespan cycling stability (<3.3 % loss after 6000 cycles). Furthermore, an asymmetric supercapacitor (ASC) device based on hybrid porous Co 3 O 4 -CeO 2 hollow polyhedrons was assembled. The ASC device possesses an energy density of 54.9 W h kg -1 , which can be retained to 44.2 W h kg -1 even at a power density of 5100 W kg -1 , indicating its promising application in electrochemical energy storage. More importantly, we believe that the present route is a simple and versatile strategy for the preparation of other hybrid metal oxides with desired structures, chemical compositions and applications. © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

Enhancement of ferromagnetism in BaFeO{sub 3}-KTa{sub 0.47}Nb{sub 0.53}O{sub 3} multilayers compared to pseudo-cubic BaFeO{sub 3} thin film grown by pulsed laser deposition

Energy Technology Data Exchange (ETDEWEB)

Cianfrone, Joe; Kim, Seonhoo; Kim, Kyeong-Won; Norton, David [Department of Materials Science and Engineering, University of Florida, Gainesville, FL (United States); Ghosh, Siddhartha; Hebard, Arthur F. [Department of Physics, University of Florida, Gainesville, FL (United States)

2017-06-15

Oxide multilayer hetero-structure of BaFeO{sub 3}-KTa{sub 0.47}Nb{sub 0.53}O{sub 3} have been grown using the pulsed laser deposition and the ex situ annealed in a flowing oxygen atmosphere. The multilayer has been characterized using X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy. Magnetic properties have been studied via SQUID measurements. Magnetization in the multilayer structure shows significant improvement compared to previous measurements of bare BaFeO{sub 3}. Measuring magnetization as a function of temperature and fitting the resulting M-T curves to Bloch's 3/2 law, yields an estimated Curie temperature (T{sub C}) of around 425 K and a P factor of around 1.5, consistent with magnetization from a three dimensional crystal structure. In spite of using a room temperature ferroelectric KTa{sub 0.47}Nb{sub 0.53}O{sub 3} composition, no evidence of ferroelectricity was observed in multi-layer structure. (copyright 2017 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

New astrophysical S factor for the 15N(p,γ)16O reaction via the asymptotic normalization coefficient (ANC) method

International Nuclear Information System (INIS)

Mukhamedzhanov, A. M.; Gagliardi, C. A.; Goldberg, V. Z.; Plunkett, A.; Trache, L.; Tribble, R. E.; Bem, P.; Burjan, V.; Hons, Z.; Kroha, V.; Mrazek, J.; Novak, J.; Piskor, S.; Simeckova, E.; Vesely, F.; Vincour, J.; La Cognata, M.; Pizzone, R. G.; Romano, S.; Spitaleri, C.

2008-01-01

The 15 N(p,γ) 16 O reaction provides a path from the CN cycle to the CNO bi-cycle and CNO tri-cycle. The measured astrophysical factor for this reaction is dominated by resonant capture through two strong J π =1 - resonances at E R =312 and 962 keV and direct capture to the ground state. Asymptotic normalization coefficients (ANCs) for the ground and seven excited states in 16 O were extracted from the comparison of experimental differential cross sections for the 15 N( 3 He,d) 16 O reaction with distorted-wave Born approximation calculations. Using these ANCs and proton and α resonance widths determined from an R-matrix fit to the data from the 15 N(p,α) 12 C reaction, we carried out an R-matrix calculation to obtain the astrophysical factor for the 15 N(p,γ) 16 O reaction. The results indicate that the direct capture contribution was previously overestimated. We find the astrophysical factor to be S(0)=36.0±6.0 keV b, which is about a factor of 2 lower than the presently accepted value. We conclude that for every 2200±300 cycles of the main CN cycle one CN catalyst is lost due to this reaction

Oxygen Reduction Reaction for Generating H2 O2 through a Piezo-Catalytic Process over Bismuth Oxychloride.

Science.gov (United States)

Shao, Dengkui; Zhang, Ling; Sun, Songmei; Wang, Wenzhong

2018-02-09

Oxygen reduction reaction (ORR) for generating H 2 O 2 through green pathways have gained much attention in recent years. Herein, we introduce a piezo-catalytic approach to obtain H 2 O 2 over bismuth oxychloride (BiOCl) through an ORR pathway. The piezoelectric response of BiOCl was directly characterized by piezoresponse force microscopy (PFM). The BiOCl exhibits efficient catalytic performance for generating H 2 O 2 (28 μmol h -1 ) only from O 2 and H 2 O, which is above the average level of H 2 O 2 produced by solar-to-chemical processes. A piezo-catalytic mechanism was proposed: with ultrasonic waves, an alternating electric field will be generated over BiOCl, which can drive charge carriers (electrons) to interact with O 2 and H 2 O, then to form H 2 O 2 . © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

[Sources of information on suicide attempts in the Nord - Pas-de-Calais (France). Contributions and limitations].

Science.gov (United States)

Plancke, L; Ducrocq, F; Clément, G; Chaud, P; Haeghebaert, S; Amariei, A; Chan-Chee, C; Goldstein, P; Vaiva, G

2014-12-01

There are very few permanent indicators of mental health in France; suicidal behavior is often only understood on the basis of deaths by suicide. The epidemiological interest and methodological limits of four medico-administrative databases from which data on suicide attempts can be extracted have been the subject of a study in the Nord - Pas-de-Calais Region of France: telephone calls for emergency medical assistance after suicide attempt (2009 to 2011), admissions in emergency services with a diagnosis of suicide attempt (2012), medical-surgical hospital admissions as a result of suicide attempt (2009 to 2011), and psychiatric admissions with a diagnosis of suicide attempt (2011). Usable data were provided by one of two emergency medical assistance units, five of thirty emergency departments and all medical-surgical and psychiatric units; in data from the latter two sources, a unique anonymous identifier gave individual statistics, while the first two covered only suicide attempts. In 2011, the number of suicide attempt calls per 100,000 inhabitants was 304, whereas the number of hospitalisations with this diagnosis was 275; rates are highest in men between 20 and 49 years of age, and in women below 20 years of age and between 40 and 49. Sources are seen to be very homogeneous with regards to the average age at which suicide took place (between 37.8 and 38.5 years, depending on the source), and to the sex (55.0% to 57.6% of women). In 2011, the number of patients with a diagnosis of suicide attempt treated in psychiatry is 2.6 times lower than the number hospitalised for suicide attempt in medical-surgical units (3563 vs 9327). Permanent gathering of data, and the large volume of data recorded, should encourage the use of these databases in the definition and assessment of mental health policy: an increased contribution from emergency call centers and emergency services, and the coding of the suicidal nature of intoxications by a few clearly under-declaring units

Venice and the redemption of Northern European slaves (seventeenth and eighteenth centuries)

OpenAIRE

Ressel, Magnus

2014-01-01

Entre 1600 et 1750, et plus particulièrement entre 1610 et 1640, des navires de l’Europe du Nord furent capturés par les corsaires barbaresques. C’était la conséquence logique de l’arrivée massive à partir de la fin du xvie siècle de navires et marchands de l’Europe du Nord en Méditerranée et de l’expansion simultanée de la course nord-africaine en Atlantique. Les Nord-Européens commencèrent à racheter leurs frères réduits en esclavage et, pour ce faire, ils eurent recours à des moyens assez ...

Amorphous and crystalline In_2O_3-based transparent conducting films for photovoltaics

International Nuclear Information System (INIS)

Koida, Takashi

2017-01-01

We reported solar cells with reduced electrical and optical losses using hydrogen-doped In_2O_3 (In_2O_3:H) transparent conducting layers with low sheet resistance and high transparence characteristics. The transparent conducting oxide (TCO) films were prepared by solid-phase crystallization of amorphous (a-) In_2O_3:H films grown by magnetron sputtering. The polycrystalline (poly-) In_2O_3:H films exhibited electron mobilities (over 100 cm"2V"-"1 s"-"1) 2 and 3 times greater than those of conventional TCO films. This paper describes (i) the current status of the electrical properties of In_2O_3-based TCO; (ii) the structural and optoelectrical properties of the a-In_2O_3:H and poly-In_2O_3:H films, focusing on the inhomogeneity and stability characteristics of the films; and (iii) the electrical properties of bilayer TCO. The potential of these high mobility TCO films for solar cells was also described. (copyright 2016 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

In situ X-ray analysis of MoO3 reduction

International Nuclear Information System (INIS)

Leisegang, T.; Levin, A.A.; Meyer, D.C.; Walter, J.

2005-01-01

The reduction of MoO 3 to MoO 2 under hydrogen/argon atmosphere (5 vol. % H 2 /95 vol. % Ar) in the temperature range 323 K..623 K was studied in situ by means of wide-angle X-ray scattering. It has been found that the starting material, MoO 3 , consists of two different orthorhombic MoO 3 phases A and B with nearly the same structure parameters. The phase A (fraction of 37.1 wt%) describes the larger crystallites whereas the phase B (fraction of 62.9 wt.%) describes the smaller crystallites. Under the reduction to monoclinic MoO 2 phase during the heating, the thermal evolution of the phase fractions is different. A conclusion is drawn that MoO 2 is formed preferably in big crystallites. About 10 wt. % of MoO 2 has been found to form at 623 K resulting in about 69 wt. % after cooling to room temperature followed by holding in Ar/H 2 atmosphere about 24 h. Additionally, about 4.4 wt. % of the Mo 4 O 11 oxide probably formed in large crystallites was detected in the reduced powder after the cooling. (copyright 2005 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Rapid synthesis and catalytic performance of {alpha}-Mn{sub 2}O{sub 3} single-crystal nanowires

Energy Technology Data Exchange (ETDEWEB)

Yuan, Xinsong; Hu, Xingming; Zhu, Jinmiao; Dong, Huaze; Wang, Yanping [Department of Chemistry and Chemical Engineering, Hefei Normal University, Hefei 230061 (China); Yang, Baojun [Anhui Key Laboratory of Controllable Chemistry Reaction and Material Chemical Engineering, School of Chemical Engineering, Hefei University of Technology, Hefei 230009 (China); Hao, Jianwen [Department of Chemical Engineering, Anhui Vocational and Technical College, Hefei 230051 (China)

2011-12-15

Single-crystal {alpha}-Mn{sub 2}O{sub 3} nanowires were prepared via a ''self-sacrificing template'' route, simply by calcining the prepared {alpha}-MnO{sub 2} nanowire precursors at 550 C for 1.5 h. XRD, TEM, SEM and HRTEM characterizations show that the as-prepared {alpha}-Mn{sub 2}O{sub 3} samples are all phase pure and the nanowires have uniform diameters of approximately 15-30 nm and lengths up to several micrometers. The catalytic performances of the prepared {alpha}-Mn{sub 2}O{sub 3} nanowires were studied in the degradation of coking wastewater with H{sub 2}O{sub 2} as the oxidant, and the technological conditions were optimized by single-factor and orthogonal experiments. (copyright 2011 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Migrations européennes, économie touristique et impasses

African Journals Online (AJOL)

et politiques induites par des flux sud-nord – principalement sous l'angle des migrations de travail, des transferts d'argent, des stratégies de passage vers le « Nord »1, des enjeux d'ethnicité et ... entreprises et institutions nord-américaines. De plus ...... Il est localement apprécié pour recruter du personnel sénégalais issu.

Core-shell structure of polypyrrole grown on V{sub 2}O{sub 5} nanoribbon as high performance anode material for supercapacitors

Energy Technology Data Exchange (ETDEWEB)

Qu, Qunting [New Energy and Materials Laboratory (NEML), Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai (China); School of Energy, Soochow University, Suzhou, Jiangsu (China); Zhu, Yusong; Gao, Xiangwen; Wu, Yuping [New Energy and Materials Laboratory (NEML), Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai (China)

2012-08-15

A core-shell structure of polypyrrole grown on V{sub 2}O{sub 5} nanoribbons as a high performance anode material for supercapacitors is fabricated using anionic dodecylbenzenesulfonate (DBS{sup -}) as surfactant. Benefiting from the nanoribbon morphology of V{sub 2}O{sub 5}, the improved charge-transfer and polymeric coating effect of PPy, PPy rate at V{sub 2}O{sub 5} nanocomposites exhibits high energy density, and excellent cycling and rate capability in K{sub 2}SO{sub 4} aqueous electrolyte. (Copyright copyright 2012 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Performance improvement of charge-trap memory by using a stacked Zr_0_._4_6Si_0_._5_4O_2/Al_2O_3 charge-trapping layer

International Nuclear Information System (INIS)

Tang, Zhenjie; Hu, Dan; Zhang, Xiwei; Zhao, Yage; Li, Rong

2016-01-01

The postdeposition annealing (PDA)-treated charge-trap flash memory capacitor with stacked Zr_0_._4_6Si_0_._5_4O_2/Al_2O_3 charge-trapping layer flanked by a SiO_2 tunneling oxide and an Al_2O_3 blocking oxide was fabricated and investigated. It is observed that the memory capacitor exhibits prominent memory characteristics with large memory windows 12.8 V in a ±10 V gate sweeping voltage range, faster program/erase speed, and good data-retention characteristics even at 125 C compared to a single charge-trapping layer (Zr_0_._4_6Si_0_._5_4O_2, Zr_0_._7_9Si_0_._2_1O_2, and Zr_0_._4_6Al_1_._0_8O_2_._5_4). The quantum wells and introduced interfacial traps of the stacked trapping layer regulate the storage and loss behavior of charges, and jointly contribute to the improved memory characteristics. Hence, the memory capacitor with a stacked trapping layer is a promising candidate in future nonvolatile charge-trap memory device design and application. (copyright 2016 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Unprecedented connection mode of [V{sub 16}Sb{sub 4}O{sub 42}(H{sub 2}O)]{sup 8-} cluster anions by Mn{sup 2+} centered complexes. Solvothermal synthesis and properties of {[Mn(teta)]_4V_1_6Sb_4O_4_2(H_2O)}{sub n}.[(H{sub 2}O){sub 12}]{sub n}

Energy Technology Data Exchange (ETDEWEB)

Rasmussen, Maren; Naether, Christian; Bensch, Wolfgang [Institute of Inorganic Chemistry, Christian-Albrechts-University of Kiel (Germany); Leusen, Jan van; Koegerler, Paul [Institute of Inorganic Chemistry, RWTH Aachen University, Aachen (Germany)

2017-11-17

The new compound {[Mn(teta)]_4V_1_6Sb_4O_4_2}{sub n}.[(H{sub 2}O){sub 12}]{sub n} (teta = triethylenetetraamine) was synthesized under solvothermal conditions. The crystal structure features the high nuclearity [V{sub 16}{sup IV}Sb{sub 4}{sup III}O{sub 42}(H{sub 2}O)]{sup 8-} cluster anion, which consists of two rings composed of 8 edge-sharing VO{sub 5} polyhedra. The rings are perpendicular to each other generating four niches, which are occupied by two VO{sub 5} pyramids and two handle-like Sb{sub 2}O{sub 5} units. The two unique anions are each surrounded by eight Mn{sup 2+} centered complexes via Mn-O{sub term}-V bonds. Such an expansion has never been observed in heterometal polyoxovanadate chemistry. The connection mode between cluster anions and complex cations generates two individual layers stacked onto each other. Between the layers weak Sb..O contacts are observed. The crystal water molecules are mainly located in the empty space between the layers. Upon heating H{sub 2}O molecules are removed, while the crystal structure remains intact. The magnetic behavior is dominated by strong antiferromagnetic exchange interactions between the central V{sup 4+} ions, while the interaction between the cluster anion and central Mn{sup 2+} ions is significantly less pronounced. (copyright 2017 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Nanomechanical quantification of elastic, plastic, and fracture properties of LiCoO{sub 2}

Energy Technology Data Exchange (ETDEWEB)

Qu, Meng; Woodford, William H.; Maloney, John M.; Carter, W. Craig; Chiang, Yet-Ming; Van Vliet, Krystyn J. [Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA (United States)

2012-08-15

Young's elastic modulus, hardness, and fracture toughness (K{sub Ic}) of individual grains are reported for polycrystalline LiCoO{sub 2}, a metal oxide cathode used in lithium-ion batteries, as measured via instrumented nanoindentation (indentations within circled locations; dashed line indicates grain boundary). The wide range of K{sub Ic} does not correlate strongly with grain orientation. (Copyright copyright 2012 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Implementation of complementary resistive switch for image matching through back-to-back connection of ITO/TiO2-x/TiO2/ITO memristors

International Nuclear Information System (INIS)

Lee, Sang-Jin; Kim, Sung-Jin; Cho, Kyoungrok; Eshraghian, Kamran

2014-01-01

Nanoscale memristive structures realized through combination of metal-insulator-metal (MIM) processing technologies have paved the way for efficient adoption of memory constructs such as ReRAM crossbar essential for mapping of new and emerging architectures. A noticeable drawback of the crossbar architecture is the existence of sneak-path currents between adjacent cells. Varieties of approaches including the complementary resistive switch (CRS) architecture offered as possible solution. This paper presents a memristor with heterojunction architecture ITO/TiO 2-x /TiO 2 /ITO and implements CRS by anti-serial (back-to-back) connection of two memristive devices. For the application of this concept, implementation of an imaging search engine based on Hamming distance measure simply highlights the versatility of this novel technology. (copyright 2014 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Use of different Zn precursors for the deposition of Zn(S,O) buffer layers by chemical bath for chalcopyrite based Cd-free thin-film solar cells

Energy Technology Data Exchange (ETDEWEB)

Saez-Araoz, R.; Lux-Steiner, M.C. [Hahn Meitner Institut, Berlin (Germany); Freie Universitaet Berlin, Berlin (Germany); Ennaoui, A.; Kropp, T.; Veryaeva, E. [Hahn Meitner Institut, Berlin (Germany); Niesen, T.P. [AVANCIS GmbH and Co. KG, Munich (Germany)

2008-10-15

Progress in fabricating Cu(In,Ga)(S,Se){sub 2} (CIGSSe) solar cells with Zn(S,O) buffer layers prepared by chemical bath deposition (CBD) is discussed. The effect of different Zn salt precursors on solar cell device performance is investigated using production scale CIGSSe absorbers provided by AVANCIS GmbH and Co. KG. The CBD process has been developed at the Hahn-Meitner-Institut (HMI) using zinc nitrate, zinc sulphate or zinc chloride as zinc precursor. An average efficiency of 14.2{+-}0.8% is obtained by using one-layer CBD Zn(S,O) The dominant recombination path for well performing solar cells is discussed based on the results obtained from temperature dependent J(V) analysis. The structure and morphology of buffer layers deposited using zinc nitrate and zinc sulphate has been studied by means of transmission electron micrographs of glass/Mo/CIGSSe/Zn(S,O) structures. Results show a conformal coverage of the absorber by a Zn(S,O) layer of 15-25 nm consisting of nanocrystals with radii of {proportional_to}5 nm. XAES analysis of the buffer layer reveals a similar surface composition for buffer layers deposited with zinc nitrate and zinc sulphate. (copyright 2008 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

diversite floristique et degre d'infestation par les mauvaises herbes ...

African Journals Online (AJOL)

AISA

installer des cultures. Or, il est reconnu que là où l'homme crée un environnement artificiel pour les cultures, les mauvaises herbes s'installent inévitablement ..... nord-cameroun. Weed Reseach 35 ;. 89 - 98. Lebreton G. et T. Le Bourgeois. 2005. Analyse comparée de la flore en culture d'ananas et de canne à sucre à la ...

The impact of headache and chronic musculoskeletal complaints on the risk of insomnia: longitudinal data from the Nord-Trøndelag health study

Science.gov (United States)

2013-01-01

Background A strong relationship between insomnia and painful disorders has been found, but it is still unclear whether chronic pain leads to insomnia. There is a need of large-scale prospective studies to evaluate if there is a causal relationship between painful disorders and insomnia. Methods All inhabitants aged ≥ 20 years in Nord-Trøndelag County of Norway were invited to participate in two surveys (n = 92,566 and 93,860, respectively). 27,185 subjects participated in both surveys, and 19,271 of these were insomnia-free at baseline (population at risk). Using logistic regression, we evaluated the influence of headache, CMSCs and coexisting headache and CMSCs on the subsequent risk of insomnia. Results Compared to subjects without headache and CMSCs, there was an increased risk of insomnia among those with headache, most pronounced among those with headache ≥ 7 days / month (OR = 2.2, 95% CI = 1.9 – 2.6). Similarly, an increased risk among those with CMSCs was found, most evident for those with widespread CMSCs (OR = 2.0, 95% CI = 1.8 – 2.2). Having coexistent CMSCs and headache (OR = 2.0, 95% CI = 1.8 – 2.2) predisposed more strongly to insomnia than having headache (OR = 1.5, 95% CI = 1.3 – 1.6) and CMSCs (OR = 1.6, 95% CI = 1.4 – 1.7) alone. Conclusion In this prospective study headache and CMSCs were risk factors for insomnia 11 years later. PMID:23566158

Elucidating the role of dissolution in CeO{sub 2} nanoparticle plant uptake by smart radiolabeling

Energy Technology Data Exchange (ETDEWEB)

Schymura, Stefan; Hildebrand, Heike; Franke, Karsten [Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Leipzig (Germany); Fricke, Thomas [Vita34 AG, Business Unit BioPlanta, Leipzig (Germany); University of Bonn, Institute of Crop Science and Resource Conservation, Division Plant Nutrition (Germany)

2017-06-19

The identification of major uptake pathways in plants is an important factor when evaluating the fate of manufactured nanoparticles in the environment and the associated risks. Using different radiolabeling techniques we were able to show a predominantly particulate uptake for CeO{sub 2} nanoparticles in contrast to a possible uptake in the form of ionic cerium. (copyright 2017 Wiley-VCH Verlag GmbH and Co. KGaA, Weinheim)

Self-assembled metastable γ-Ga2O3 nanoflowers with hexagonal nanopetals for solar-blind photodetection.

Science.gov (United States)

Teng, Yue; Song, Le Xin; Ponchel, Anne; Yang, Zheng Kun; Xia, Juan

2014-09-01

Metastable γ-Ga2O3 nanoflowers assembled from hexagonal nanopetals are successfully constructed by the oxidation of metallic Ga in acetone solution. The nanoflowers with a hollow interior structure exhibit a short response time and a large light-current-dark-current ratio under a relatively low bias voltage, suggesting an especially important potential application in solar-blind photodetection. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Hybrid MnO2/carbon nanotube-VN/carbon nanotube supercapacitors

Science.gov (United States)

Su, Y.; Zhitomirsky, I.

2014-12-01

Composite materials, containing fibrous VN nanoparticles and multiwalled carbon nanotubes (MWCNT) are prepared by a chemical method for application in electrochemical supercapacitors. We demonstrate for the first time that VN-MWCNT electrodes exhibit good capacitive behavior in 0.5 M Na2SO4 electrolyte in a negative voltage window of 0.9 V. Quartz crystal microbalance studies provide an insight into the mechanism of charge storage. Composite VN-MWCNT materials show significant improvement in capacitance, compared to individual VN and MWCNT materials. Testing results indicate that VN-MWCNT electrodes exhibit high specific capacitance at high mass loadings in the range of 10-30 mg cm-2, good capacitance retention at scan rates in the range of 2-200 mV s-1 and good cycling stability. The highest specific capacitance of 160 F g-1 is achieved at a scan rate of 2 mV s-1. The new findings open a new and promising strategy in the fabrication of hybrid devices based on VN. The proof-of-principle is demonstrated by the fabrication of hybrid supercapacitor devices based on VN-MWCNT negative electrodes and MnO2 -MWCNT positive electrodes with voltage window of 1.8 V in aqueous 0.5 M Na2SO4 electrolyte. The hybrid VN-MWCNT/MnO2-MWCNT supercapacitor cells show promising capacitive and power-energy characteristics.

Kuidas ehitada ilma plaanita / Raivo Palmaru ; intervjueerinud Raivo Juurak

Index Scriptorium Estoniae

Palmaru, Raivo, 1951-

2009-01-01

Intervjuu Akadeemia Nord professori Raivo Palmaruga, kellel ilmus tänavu raamat "Kujutluste ühiskond" (Tallinn : Akadeemia Nord, 2009), kus autor keskendub postmodernistliku ühiskonna tunnetuslikele alustele

Joining the un-joinable: adhesion between low surface energy polymers using tetrapodal ZnO linkers.

Science.gov (United States)

Jin, Xin; Strueben, Jan; Heepe, Lars; Kovalev, Alexander; Mishra, Yogendra K; Adelung, Rainer; Gorb, Stanislav N; Staubitz, Anne

2012-11-08

Tetrapodal ZnO crystals are used for mechanical interlocking of PTFE and cross-linked PDMS, classically non-adhesive polymers. This novel approach is straightforward and easily applicable and leads to a peel strength that is higher than 200 N m(-1) without chemical modification of the surfaces. The shape of these fillers emerged as a crucial aspect of the interlocking mechanism. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Carbon Dots/NiCo2 O4 Nanocomposites with Various Morphologies for High Performance Supercapacitors.

Science.gov (United States)

Wei, Ji-Shi; Ding, Hui; Zhang, Peng; Song, Yan-Fang; Chen, Jie; Wang, Yong-Gang; Xiong, Huan-Ming

2016-11-01

A series of carbon dots/NiCo 2 O 4 composites with various morphologies are prepared and tested for supercapacitors. These samples have good electrical conductivities and efficient ions transport paths, so they exhibit high specific capacitances, superior rate performances, and high cycling stabilities. The optimal composite for hybrid supercapacitor exhibits a high energy density up to 62.0 Wh kg -1 . © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Influence of the supporting salt concentration on the electrodeposition of ZnO/eosin Y hybrid films

Energy Technology Data Exchange (ETDEWEB)

Boeckler, C.; Oekermann, T. [Institute of Physical Chemistry and Electrochemistry, Leibniz University Hannover (Germany); Saruban, M.; Ichinose, K.; Yoshida, T. [Center of Innovative Photovoltaic Systems (CIPS), Environmental and Renewable Energy Systems (ERES) Division, Graduate School of Engineering, Gifu University (Japan)

2008-10-15

ZnO/eosin Y hybrid films were electrodeposited from O{sub 2}-saturated ZnCl{sub 2}-solution under variation of the concentration of the supporting salt KCl. The supporting salt concentration was found to have a significant influence on the amount of dye loading and the morphology of the ZnO/eosin Y films. By decreasing the supporting salt concentration to 0.01 M KCl, porous films with a high dye loading can be obtained at potentials of -0.8 V vs. SCE at low eosin Y concentrations in the electrodeposition bath, which usually only lead to porous films at potentials where eosin Y is reduced (<-0.9 V vs. SCE). (copyright 2008 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Résumés

OpenAIRE

2016-01-01

Introduction Jean-Luc Racine De l’alimentation, des agriculteurs, du commerce et des Etats. Un dialogue franco-indien sur l’agriculture et l’Organisation mondiale du commerce Quelles que puissent être les différences entre la France—où la part de la population paysanne est minime—et l’Inde—où elle est majoritaire—les deux pays sont des puissances agricoles marquées par une tradition interventionniste de l’Etat. Pour celui du Nord comme pour celui du Sud l’agriculture est un enjeu d’importance...

Layered Nano-TiO2 Based Treatments for the Maintenance of Natural Stones in Historical Architecture.

Science.gov (United States)

Gherardi, Francesca; Goidanich, Sara; Dal Santo, Vladimiro; Toniolo, Lucia

2018-06-18

Layered treatments of natural stones based on dispersions of experimental nano-TiO 2 and commercial TEOS showing photocatalytic and self-cleaning properties were set up and tested. To enhance nano-TiO 2 efficacy, a surface pre-treatment with tetraethyl orthosilicate was proposed to avoid the penetration of NPs into the crystalline porous substrates and to improve their adhesion to the stone. Two treatment applications (wet-on-wet and wet-on-dry) were compared, showing different results. A strong interaction Si-O-Ti was the key factor for the successful treatment, leaving the band gap and relevant properties of nano-TiO 2 unaltered. The layered treatments were tested on a porous calcarenite (Noto stone) and a very compact marble (Carrara marble). The combined SiO 2 -nano-TiO 2 treatments can find application in suitable cases where a surface consolidation is needed, ensuring a depolluting and self-cleaning durable activity. © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

A 15-Year Follow-Up Study of Sense of Humor and Causes of Mortality: The Nord-Trøndelag Health Study.

Science.gov (United States)

Romundstad, Solfrid; Svebak, Sven; Holen, Are; Holmen, Jostein

2016-04-01

Associations between the sense of humor and survival in relation to specific diseases has so far never been studied. We conducted a 15-year follow-up study of 53,556 participants in the population-based Nord-Trøndelag Health Study, Norway. Cognitive, social, and affective components of the sense of humor were obtained, and associations with all-cause mortality, mortality due to cardiovascular diseases (CVD), infections, cancer, and chronic obstructive pulmonary diseases were estimated by hazard ratios (HRs). After multivariate adjustments, high scores on the cognitive component of the sense of humor were significantly associated with lower all-cause mortality in women (HR = 0.52, 95% confidence interval [CI] = 0.33-0.81), but not in men (HR = 0.88, 95% CI = 0.59-1.32). Mortality due to CVD was significantly lower in women with high scores on the cognitive component (HR = 0.27, 95% CI = 0.15-0.47), and so was mortality due to infections both in men (HR = 0.26, 95% CI = 0.09-0.74) and women (HR = 0.17, 95% CI = 0.04-0.76). The social and affective components of the sense of humor were not associated with mortality. In the total population, the positive association between the cognitive component of sense of humor and survival was present until the age of 85 years. The cognitive component of the sense of humor is positively associated with survival from mortality related to CVD and infections in women and with infection-related mortality in men. The findings indicate that sense of humor is a health-protecting cognitive coping resource.

Controlled synthesis of SrCrO4 crystals with different morphologies

International Nuclear Information System (INIS)

Yang, Xiao-Hong; Wu, Qing-Sheng; Liu, Jin-Ku

2007-01-01

Rod-shape, branch-shape, bouquet-shape and claw-shape SrCrO 4 crystals were synthesized through biomembrane/organic-addition supramolecular templates. The shapes are mainly changed with variance of the organic reagents and organic membranes. Most of the morphologies haven't been reported in the literature. This method may meet with the requirements to synthesize materials of various morphologies and size by using different supramolecular templates. This paper discusses how to control crystals' growth by supramolecular templates. (copyright 2007 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Integrated synthesis of poly(o-phenylenediamine)-derived carbon materials for high performance supercapacitors

Energy Technology Data Exchange (ETDEWEB)

Zhu, Hui; Wang, Xiaolei; Liu, Xuexia; Yang, Xiurong [State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022 (China)

2012-12-18

Poly(o-phenylenediamine) (POPD)-derived functional carbon materials with excellent capacitive performance are successfully synthesized by means of an integrated one-step process, in which FeCl{sub 3} not only oxidizes the polymerization of the organic monomers but also activates the carbonization. Furthermore, extensive research has proved that this strategy to discover novel carbons is useful not only for capacitors but also for other energy storage/conversion devices. (Copyright copyright 2012 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Integrated synthesis of poly(o-phenylenediamine)-derived carbon materials for high performance supercapacitors.

Science.gov (United States)

Zhu, Hui; Wang, Xiaolei; Liu, Xuexia; Yang, Xiurong

2012-12-18

Poly(o-phenylenediamine) (POPD)-derived functional carbon materials with excellent capacitive performance are successfully synthesized by means of an integrated one-step process, in which FeCl(3) not only oxidizes the polymerization of the organic monomers but also activates the carbonization. Furthermore, extensive research has proved that this strategy to discover novel carbons is useful not only for capacitors but also for other energy storage/conversion devices. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

The influence of social capital on self-rated health and depression – The Nord-Trøndelag health study (HUNT

Directory of Open Access Journals (Sweden)

Erik R. Sund

2007-01-01

Full Text Available The article examines the relationship between neighbourhood social capital and two health outcomes: selfrated health and depression. A total of 42,571 individuals aged 30–67 years participated in a cross-sectional total population health study in Nord-Trøndelag in 1995–1997 (HUNT II and were investigated using multilevel modelling. Aims were, first, to investigate potential area effects after accounting for the characteristics of individuals in the neighbourhoods (N = 155, and, second, to explore the relationships between contextual social capital (the level of trust at the neighbourhood level and the level of local organizational activity and the two health measures. Models with stepwise inclusion of individual level factors attenuated the ward level variance for both self-rated health (PCV: 41% and depression (PCV: 43%. The inclusion of the two contextual social capital items attenuated the ward level variance for both self-rated health and depression, however to varying degrees. At the individual level, contextual social capital was associated with both self-rated health and depression. Individuals living in wards with a low level of trust experienced an increased risk of 1.36 (95% CI: 1.13-1.63 for poor self-rated health compared to individuals in wards with a high level of trust. For depression, this effect was even stronger (OR 1.52, 1.23-1.87. The associations with the level of organizational activity were inconsistent and weaker for both health outcomes. It was concluded that geographical variations in self-rated health and depression are largely due to the socioeconomic characteristics of individuals. Nevertheless, contextual social capital, expressed as the level of trust, was found to be associated with depression and self-rated health at individual level.

German Energy Security and Its Implications on Regional Security

Science.gov (United States)

2016-12-01

from acting unilaterally. They exhibit a higher degree of transparency than their autocratic counterparts and thus do a better job at signaling intent...political parties, the SPD is often labeled as being pro-Russian.75 Gerhard Schroeder, leader of the SPD and Chancellor during its coalition with the...must also claim responsibility for Nord Stream, as it oversaw the commissioning of Nord Stream 1 and negotiations for Nord Stream 2. While the leader

Speciation analysis of mercury by dispersive solid-phase extraction coupled with capillary electrophoresis.

Science.gov (United States)

Li, Jinhua; Liu, Junying; Lu, Wenhui; Gao, Fangfang; Wang, Liyan; Ma, Jiping; Liu, Huitao; Liao, Chunyang; Chen, Lingxin

2018-04-23

A pretreatment method of dispersive solid-phase extraction (DSPE) along with back-extraction followed by CE-UV detector was developed for the determination of mercury species in water samples. Sulfhydryl-functionalized SiO 2 microspheres (SiO 2 -SH) were synthesized and used as DSPE adsorbents for selective extraction and enrichment of three organic mercury species namely ethylmercury (EtHg), methylmercury (MeHg), and phenylmercury (PhHg), along with L-cysteine (L-cys) containing hydrochloric acid as back-extraction solvent. Several main extraction parameters were systematically investigated including sample pH, amount of adsorbent, extraction and back-extraction time, volume of eluent, and concentration of hydrochloric acid. Under optimal conditions, good linearity was achieved with correlation coefficients over 0.9990, in the range of 4-200 μg/L for EtHg, and 2-200 μg/L for MeHg and PhHg. The LODs were obtained of 1.07, 0.34, and 0.24 μg/L for EtHg, MeHg, and PhHg, respectively, as well as the LOQs were 3.57, 1.13, and 0.79 μg/L, respectively, with enrichment factors ranging from 109 to 184. Recoveries were attained with tap and lake water samples in a range of 62.3-107.2%, with relative standard deviations of 3.5-10.1%. The results proved that the method of SiO 2 -SH based DSPE coupled with CE-UV was a simple, rapid, cost-effective, and eco-friendly alternative for the determination of mercury species in water samples. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Flow-Regulated Growth of Titanium Dioxide (TiO2 ) Nanotubes in Microfluidics.

Science.gov (United States)

Fan, Rong; Chen, Xinye; Wang, Zihao; Custer, David; Wan, Jiandi

2017-08-01

Electrochemical anodization of titanium (Ti) in a static, bulk condition is used widely to fabricate self-organized TiO 2 nanotube arrays. Such bulk approaches, however, require extended anodization times to obtain long TiO 2 nanotubes and produce only vertically aligned nanotubes. To date, it remains challenging to develop effective strategies to grow long TiO 2 nanotubes in a short period of time, and to control the nanotube orientation. Here, it is shown that the anodic growth of TiO 2 nanotubes is significantly enhanced (≈16-20 times faster) under flow conditions in microfluidics. Flow not only controls the diameter, length, and crystal orientations of TiO 2 nanotubes, but also regulates the spatial distribution of nanotubes inside microfluidic devices. Strikingly, when a Ti thin film is deposited on silicon substrates and anodized in microfluidics, both vertically and horizontally aligned (relative to the bottom substrate) TiO 2 nanotubes can be produced. The results demonstrate previously unidentified roles of flow in the regulation of growth of TiO 2 nanotubes, and provide powerful approaches to effectively grow long, oriented TiO 2 nanotubes, and construct hierarchical TiO 2 nanotube arrays on silicon-based materials. © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Mike Davis, Génocides tropicaux. Catastrophes naturelles et famines coloniales (1870-1900. Aux origines du sous-développement, Paris, La Découverte, 2003, 479 p., trad. Late Victorian Holocausts, El Niño Famines and the Making of the Third World, 2001.

Directory of Open Access Journals (Sweden)

Cyrille Ferraton

2005-04-01

Full Text Available C’est à une histoire en grande partie négligée et méconnue qu’est consacré l’ouvrage de Mike Davis Génocides tropicaux publié en 2001 sous le titre Late Victorian Holocausts, El Niño Famines and the Making of the Third World. L’Inde, la Chine, le Brésil, l’Afrique du Nord, l’Afrique australe, les Philippines, en fait, un grand nombre de pays qu’Alfred Sauvy désignera en 1952 par pays du « tiers-monde », connurent à la fin du XIXe siècle et au tout début du XXe siècle trois périodes climatique...

Dismantling the activated annular water tank of the Rheinsberg nuclear power plant

International Nuclear Information System (INIS)

Klietz, Maik; Konitzer, Arnold; Luedeke, Michael

2010-01-01

Acting on behalf of Energiewerke Nord GmbH Lubmin, Anlagen- und Kraftwerksrohrleitungsbau Greifswald GmbH (AKB) planned and built a station for disassembly of the activated annular water tank (RWB) of the decommissioned Rheinsberg nuclear power plant. As part of this demolition step, the annular water tank must be conditioned and disposed of as a component of the reactor facility. This required planning, manufacturing, testing and construction on site of suitable disassembly and handling techniques and the necessary plant and equipment. The client opted for disassembly by means of a diamond cable saw for conditioning the annular water tank into segments fit for shipping, and defined the basic components for the disassembly station in a specification of deliveries and services. The disassembly station serves to divide the annular water tank by means of diamond cable saws into 2 sections in such a way that segment pieces for transport are produced. The existing activation of the annular water tank also entailed the need to plan for the shortest possible time to be spent on handling near the annular water tank, providing radiological protection to the personnel, and performing the sawing steps from a separate operating console assisted by camera surveillance. After works acceptance tests at the manufacturer's, AKB, in October 2009 and February 2010, the disassembly station was delivered to the customer at Rheinsberg KKR free from defects in June 2010. (orig.)

CaO-Based CO2 Sorbents Effectively Stabilized by Metal Oxides.

Science.gov (United States)

Naeem, Muhammad Awais; Armutlulu, Andac; Imtiaz, Qasim; Müller, Christoph R

2017-11-17

Calcium looping (i.e., CO 2 capture by CaO) is a promising second-generation CO 2 capture technology. CaO, derived from naturally occurring limestone, offers an inexpensive solution, but due to the harsh operating conditions of the process, limestone-derived sorbents undergo a rapid capacity decay induced by the sintering of CaCO 3 . Here, we report a Pechini method to synthesize cyclically stable, CaO-based CO 2 sorbents with a high CO 2 uptake capacity. The sorbents synthesized feature compositional homogeneity in combination with a nanostructured and highly porous morphology. The presence of a single (Al 2 O 3 or Y 2 O 3 ) or bimetal oxide (Al 2 O 3 -Y 2 O 3 ) provides cyclic stability, except for MgO which undergoes a significant increase in its particle size with the cycle number. We also demonstrate a direct relationship between the CO 2 uptake and the morphology of the synthesized sorbents. After 30 cycles of calcination and carbonation, the best performing sorbent, containing an equimolar mixture of Al 2 O 3 and Y 2 O 3 , exhibits a CO 2 uptake capacity of 8.7 mmol CO 2  g -1 sorbent, which is approximately 360 % higher than that of the reference limestone. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

Effects of MnO{sub 2} doping on structure, dielectric and piezoelectric properties of 0.825NaNbO{sub 3}-0.175Ba{sub 0.6}(Bi{sub 0.5}K{sub 0.5}){sub 0.4}TiO{sub 3} lead-free ceramics

Energy Technology Data Exchange (ETDEWEB)

Fan, Ximing; Lin, Dunmin; Zheng, Qiaoji; Sun, Hailing; Wan, Yang; Wu, Xiaochun [College of Chemistry and Materials Science, and Visual Computing and Virtual Reality Key Laboratory of Sichuan Province, Sichuan Normal University, Chengdu 610066 (China); Wu, Lang [State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology, Mianyang 621010 (China)

2012-12-15

Lead-free ceramics 0.825NaNbO{sub 3}-0.175Ba{sub 0.6}(Bi{sub 0.5}K{sub 0.5}){sub 0.4}TiO{sub 3} + xmol% MnO{sub 2} were prepared by an ordinary sintering technique and the effects of MnO{sub 2} doping on the structure, dielectric, and piezoelectric properties of the ceramics were studied. The ceramics with perovskite structure are transformed from tetragonal to pseudocubic phases by increasing the doping level of MnO{sub 2}. After the addition of MnO{sub 2}, the Curie temperature T{sub C} of the ceramics decreases and the ferroelectric-paraelectric phase transition at T{sub C} becomes more diffusive. Because of the donor and acceptor doping effects of Mn ions simultaneously, the piezoelectric constant d{sub 33}, electromechanical coupling coefficient k{sub p}, relative permittivity {epsilon}{sub r}, and mechanical quality factor Q{sub m} are enhanced considerably after the addition of 1 mol% MnO{sub 2}. The ceramic with 1 mol% MnO{sub 2} doping possesses the optimum piezoelectricity (d{sub 33} = 131 pC/N and k{sub p} = 21.8%) and relatively high Q{sub m} = 627. (Copyright copyright 2012 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Promoting Photocatalytic Overall Water Splitting by Controlled Magnesium Incorporation in SrTiO3 Photocatalysts.

Science.gov (United States)

Han, Kai; Lin, Yen-Chun; Yang, Chia-Min; Jong, Ronald; Mul, Guido; Mei, Bastian

2017-11-23

SrTiO 3 is a well-known photocatalyst inducing overall water splitting when exposed to UV irradiation of wavelengths water-splitting efficiency of the Mg:SrTiO x composites is up to 20 times higher compared to SrTiO 3 containing similar catalytic nanoparticles, and an apparent quantum yield (AQY) of 10 % can be obtained in the wavelength range of 300-400 nm. Detailed characterization of the Mg:SrTiO x composites revealed that Mg is likely substituting the tetravalent Ti ion, leading to a favorable surface-space-charge layer. This originates from tuning of the donor density in the cubic SrTiO 3 structure by Mg incorporation and enables high oxygen-evolution rates. Nevertheless, interfacing with an appropriate hydrogen evolution catalyst is mandatory and non-trivial to obtain high-performance in water splitting. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

DESCRIPCIÓN Y EXPLICACIÓN DEL DISEÑO DE INSTRUMENTOS QUE MIDEN LA COMPETENCIA TRADUCTORA Y TERMINOLÓGICA EN TRADUCTORES PROFESIONALES

Directory of Open Access Journals (Sweden)

Olga Umaña Corrales

2013-08-01

Full Text Available Este artículo presenta la descripción y explicación del diseño de cuatro instrumentos que miden la competencia terminológica (Cabré, 1998 y las subcompetencias de la competencia traductora (PACTE, 2000. Nuestro objetivo es explicar en detalle cada uno de los instrumentos: (1 textos etiquetados con problemas de traducción; (2 instrumento de valoración de los textos etiquetados; (3 cuestionario sobre el proceso traductor – entrevista semi-estructurada; (4 instrumento de operacionalización de categorías–entrevista estructurada. Para llevar a cabo la selección de los textos especializados se tuvieron en cuenta algunos criterios: nivel de especialidad, densidad terminológica, diversidad en los problemas de traducción y de terminología. Para el etiquetaje de dichos textos, se tuvieron en cuenta los aportes de Nord (1991 y Orozco (2000, en cuanto a la definición y clasificación de los problemas de traducción. Los instrumentos diseñados constituyen una propuesta para llenar un vacío identificado en los ámbitos de la traducción y la terminología, así como un insumo para el desarrollo de herramientas de traducción.

Scalable Synthesis of Triple-Core-Shell Nanostructures of TiO2 @MnO2 @C for High Performance Supercapacitors Using Structure-Guided Combustion Waves.

Science.gov (United States)

Shin, Dongjoon; Shin, Jungho; Yeo, Taehan; Hwang, Hayoung; Park, Seonghyun; Choi, Wonjoon

2018-03-01

Core-shell nanostructures of metal oxides and carbon-based materials have emerged as outstanding electrode materials for supercapacitors and batteries. However, their synthesis requires complex procedures that incur high costs and long processing times. Herein, a new route is proposed for synthesizing triple-core-shell nanoparticles of TiO 2 @MnO 2 @C using structure-guided combustion waves (SGCWs), which originate from incomplete combustion inside chemical-fuel-wrapped nanostructures, and their application in supercapacitor electrodes. SGCWs transform TiO 2 to TiO 2 @C and TiO 2 @MnO 2 to TiO 2 @MnO 2 @C via the incompletely combusted carbonaceous fuels under an open-air atmosphere, in seconds. The synthesized carbon layers act as templates for MnO 2 shells in TiO 2 @C and organic shells of TiO 2 @MnO 2 @C. The TiO 2 @MnO 2 @C-based electrodes exhibit a greater specific capacitance (488 F g -1 at 5 mV s -1 ) and capacitance retention (97.4% after 10 000 cycles at 1.0 V s -1 ), while the absence of MnO 2 and carbon shells reveals a severe degradation in the specific capacitance and capacitance retention. Because the core-TiO 2 nanoparticles and carbon shell prevent the deformation of the inner and outer sides of the MnO 2 shell, the nanostructures of the TiO 2 @MnO 2 @C are preserved despite the long-term cycling, giving the superior performance. This SGCW-driven fabrication enables the scalable synthesis of multiple-core-shell structures applicable to diverse electrochemical applications. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Optical properties and radiation response of Ce3+-doped GdScO3 crystals

International Nuclear Information System (INIS)

Yamaji, Akihiro; Fujimoto, Yutaka; Futami, Yoshisuke; Yokota, Yuui; Kurosawa, Shunsuke; Kochurikhin, Vladimir; Yanagida, Takayuki; Yoshikawa, Akira

2012-01-01

10%-Ce doped GdScO 3 perovskite type single crystal was grown by the Czochralski process. The Ce concentration in the crystal was measured. No impurity phases were observed by powder X-ray diffraction analysis. We evaluated the optical and radiation properties of the grown crystal. Ce:GdScO 3 crystal showed photo- and radio-luminescence peaks due to Ce 3+ of 5d-4f transition and colour centre. The photoluminescence decay time was sub-ns order. The relative light yield under 5.5 MeV alpha-ray excitation was calculated to be approximately 9% of BGO. (copyright 2012 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Low-temperature atomic layer deposition of MoO{sub x} for silicon heterojunction solar cells

Energy Technology Data Exchange (ETDEWEB)

Macco, B.; Vos, M.F.J.; Thissen, N.F.W.; Bol, A.A. [Department of Applied Physics, Eindhoven University of Technology, Eindhoven (Netherlands); Kessels, W.M.M. [Department of Applied Physics, Eindhoven University of Technology, Eindhoven (Netherlands); Solliance Solar Research, Eindhoven (Netherlands)

2015-07-15

The preparation of high-quality molybdenum oxide (MoO{sub x}) is demonstrated by plasma-enhanced atomic layer deposition (ALD) at substrate temperatures down to 50 C. The films are amorphous, slightly substoichiometric with respect to MoO{sub 3}, and free of other elements apart from hydrogen (<11 at%). The films have a high transparency in the visible region and their compatibility with a-Si:H passivation schemes is demonstrated. It is discussed that these aspects, in conjunction with the low processing temperature and the ability to deposit very thin conformal films, make this ALD process promising for the future application of MoO{sub x} in hole-selective contacts for silicon heterojunction solar cells. (copyright 2015 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

Enhancement of Glycerol Steam Reforming Activity and Thermal Stability by Incorporating CeO2 and TiO2 in Ni- and Co-MCM-41 Catalysts

Science.gov (United States)

Dade, William N.

Hydrogen (H2) has many applications in industry with current focus shifted to production of hydrocarbon fuels and valuable oxygenates using the Fischer-Tropsch technology and direct use in proton exchange membrane fuel cell (PEMFC). Hydrogen is generally produced via steam reforming of natural gas or alcohols like methanol and ethanol. Glycerol, a by-product of biodiesel production process, is currently considered to be one of the most attractive sources of sustainable H2 due to its high H/C ratio and bio-based origin. Ni and Co based catalysts have been reported to be active in glycerol steam reforming (GSR); however, deactivation of the catalysts by carbon deposition and sintering under GSR operating conditions is a major challenge. In this study, a series of catalysts containing Ni and Co nanoparticles incorporated in CeO2 and TiO2 modified high surface area MCM-41 have been synthesized using one-pot method. The catalysts are tested for GSR (at H2O/Glycerol mole ratio of 12 and GHSV of 2200 h-1) to study the effect of support modification and reaction temperature (450 - 700 °C) on the product selectivity and long term stability. GSR results revealed that all the catalysts performed significantly well exhibiting over 85% glycerol conversion at 650 °C except Ni catalysts that showed better low temperature activities. Deactivation studies of the catalysts conducted at 650 °C indicated that the Ni-TiO2-MCM-41 and Ni-CeO 2-MCM-41 were resistant to deactivation with ˜100% glycerol conversion for 40 h. In contrast, Co-TiO2-MCM-41 perform poorly as the catalyst rapidly deactivated after 12 h to yield ˜20% glycerol conversion after 40 h. The WAXRD and TGA-DSC analyses of spent catalysts showed a significant amount of coke deposition that might explain catalysts deactivation. The flattening shape of the original BET type IV isotherm with drastic reduction of catalyst surface area can also be responsible for observed drop in catalysts activities.

TX 2000: total reflection and 45o energy dispersive x-ray fluorescence spectrometer

International Nuclear Information System (INIS)

Pasti, F.; Torboli, A.; Valdes, M.

2000-01-01

This equipment, developed by Ital Structures, combines two kinds of energy dispersive X-ray fluorescence techniques, the first using total reflection geometry and the second conventional 45 o geometry. The equipment is completely controlled by a PC and to reach the condition of total reflection is very easy because it is enough to load the file with the right position for the corresponding energy. In this apparatus we used an x-ray tube with an alloy anode of Mo/W with a long fine focus at 2200 W. To monochromatize the x-ray beam while choosing, for example, the Mo K alpha or W L alpha or a piece of white spectrum of 33 keV, we use a highly reflective multilayer made of Si/W with 2d = 45.5 A o . The detector used in the equipment is a lithium drifted silicon detector (Si(Li)) with an excellent energy resolution of 135 eV at 5.9 keV and 1000 cps. We developed two programs written in Windows 95, 98 and NT for a 32 bit microprocessor. The first one is called TYACQ32 and has the following functions: first, complete control of the hardware, second automatic alignment of the TX 2000 spectrometer and third acquisition of spectra. The second program is EDXRF32. This is a program to accomplish spectrum and quantitative analysis for TXRF and EDXRF 45 o degrees analysis. (author)

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