WorldWideScience

Sample records for mehr als halbiert

  1. (Medienbildung und Informatik. Informatische Bildung muss mehr als Coding sein!

    Directory of Open Access Journals (Sweden)

    Daniel Autenrieth

    2015-09-01

    Full Text Available Niemand kann die Wichtigkeit der Informatik für unsere Welt abstreiten. Fast jeder Aspekt unseres Lebens steht in einer bestimmten Art in Verbindung mit Software. Es ist daher logisch anzunehmen, dass Kinder die Fähigkeit benötigen die Technik, die sie verwenden, zu verstehen und diese auch kritisch zu betrachten. Dieser Umstand macht Informatik zu einem wichtigen Teilaspekt der Medienbildung. Weiterhin erweitern die Fortschritte aus der Computerentwicklung unsere Fähigkeit Probleme zu lösen in einer bisher unbekannten Dimension. SchülerInnen werden neue Fähigkeiten lernen und einüben müssen (Computational Thinking um diese revolutionären Veränderungen, die der technische Fortschritt mit sich bringt, auszunutzen. Die Schlüsselfrage wird dabei sein, welchen Ansatz man wählen wird, um diese Fähigkeiten auszubilden und welche politischen Beweggründe dahinterstehen. Die aktuelle politische Lage zeigt eine wirtschaftliche Orientierung, die ähnlich ist zur Stärkung der MINT-Fächer vor einigen Jahren, welche ebenfalls von der Wirtschaft gefordert wurde. Bildung muss jedoch mehr sein als die Erfüllung von aus der Wirtschaft stammenden Wünschen. Nobody can deny the importance of computer science for today’s world. Almost every aspect of our daily lives is somehow connected to a piece of software. It is therefore only logical to assume that our children need the ability to comprehend and critically examine the technology they are using, which makes computer science an important issue for media education. Furthermore, advances in computing have expanded our capacity to solve problems at a scale never before imagined, using strategies that have not been available to us before. Students will need to learn and practice new skills — computational thinking skills — to take full advantage of these revolutionary changes brought about by rapid changes in technology. The key issue will be the approach on how to teach children these skills

  2. eLectures – Lehrkräftefortbildung der Zukunft - Erfahrungsbericht über mehr als 1 Jahr synchrones e-Learning

    Directory of Open Access Journals (Sweden)

    Alfred Peherstorfer

    2011-09-01

    Full Text Available Seit mehr als einem Jahr wird seitens der Virtuellen PH auf der Live Online Plattform Adobe Connect Weiterbildung für Lehrkräfte angeboten: eLectures. Hier ein Erfahrungsbericht.

  3. Data Curation oder (Retro Digitalisierung ist mehr als die Produktion von Daten

    Directory of Open Access Journals (Sweden)

    Klaus Kempf

    2015-12-01

    Full Text Available Nahezu jede Bibliothek, die über Altbestand verfügt, beschäftigt sich heute mit dem Thema Digitalisierung. Dabei wird oftmals übersehen, dass die dauerhafte und möglichst nutzerfreundliche Bereitstellung (und letztlich die Archivierung der erzeugten Daten organisatorische Anforderungen ganz eigener Art an die bestandshaltende Institution stellt. Anders als bei analogen Materialien ist es mit dem sachgerechten Vorhalten und der Ausgabe des Sammelguts in buchklimatisch möglichst einwandfreien Räumlichkeiten nicht getan. Elektronische Dokumente, egal welcher Herkunft, welchen Umfangs, Typs und Inhalts, verlangen – weitgehend unabhängig von ihrer tatsächlichen Inanspruchnahme – ein aktives und extrem aufwändiges Datenmanagement sowie eine intensive Datenpflege. Dazu kommen der Betrieb und das regelmäßige Update der für das Datenangebot notwendigen Hard- und Software. Dieses Tun wird in der angelsächsischen Bibliothekswelt gemeinhin mit dem Begriff „digital curation“ oder „data curation“, manchmal auch mit „data stewardship“ umschrieben. Organisationsstrukturen und Arbeitsabläufe (Geschäftsgänge des digitalen Servicekonzepts der Bibliothek müssen darauf ausgelegt sein, die notwendigen personellen und finanziellen Ressourcen müssen dafür eingeplant und bereitgestellt werden. In deutschen Bibliotheken wird diesem wesentlichen Aspekt des digitalen Arbeitens nach wie vor viel zu wenig Aufmerksamkeit geschenkt, dabei ist er für die Qualität des (digitalen Servicekonzepts und seiner Nutzerakzeptanz von herausragender Bedeutung. In dem Beitrag sollen vor dem Hintergrund der langjährigen Erfahrungen in der Bayerischen Staatsbibliothek (BSB die Dimension und Komplexität des Problems aufgezeigt sowie mittlerweile praxiserprobte Lösungsansätze vorgestellt werden. Today almost every library with historic collections faces the question of digitisation. However, it is often ignored that a long-term and

  4. Verlauf des lokoregionären Prostatakarzinoms unter Diätveränderung und Nahrungsmittelergänzung: Longitudinale Beobachtung über mehr als 3 Jahre

    Directory of Open Access Journals (Sweden)

    Schlarp OM

    2006-01-01

    Kontrollbiopsien kein Tumor mehr nachgewiesen werden, bei 46 % blieb die Anzahl der positiven Biopsien gleich. Keiner der Patienten ist bis jetzt klinisch apparent geworden. Konklusion: Eine diätetische Unterstützung (Active Surveillance kann den klinischen Verlauf des organbegrenzten Karzinoms günstig beeinflussen. Diese Therapieoption kann Patienten in Hinblick auf eine Lebensqualitätsorientierte Lebenserwartung auch von mehr als 10 Jahren angeboten werden. Voraussetzung ist ein strenger Follow-up und eine entsprechende Compliance.

  5. Mehr als Kodieren? Evaluation Computerunterstützter qualitativer Datenanalyse-Software (CAQDAS) für die Diskursanalyse von Nachrichtentexten

    OpenAIRE

    MacMillan, Katie

    2005-01-01

    Computerunterstützte qualitative Datenanalyse-Software (CAQDAS) wird häufig als Werkzeug für qualitative Forschung generell beschrieben, wobei "qualitative Forschung" meist als homogene Kategorie behandelt wird. Nur wenige Studien haben sich mit der Tauglichkeit von CAQDAS für spezifische Methoden beschäftigt, und ein noch kleinerer Teil mit der Nutzung von CAQDAS im Feld der Diskursanalyse (DA). In der Regel wird in solchen Studien kurz angemerkt, dass aus CAQDAS technische Begrenzungen für ...

  6. Interdisciplinarity, more than just a word? Findings of a case study on urban water management; Ist die Interdisziplinaritaet mehr als ein Schlagwort? Erkenntnisse aus einer siedlungswasserwirtschaftlichen Fallstudie

    Energy Technology Data Exchange (ETDEWEB)

    Krejci, V. [Eidgenoessische Anstalt fuer Wasserversorgung, Abwasserreinigung und Gewaesserschutz, Duebendorf (Switzerland)

    2000-07-01

    This is the first interdisciplinary approach to urban water and waste water managment. The author presents the knowledge acquired during the project. [German] Die ganzheitliche Betrachtung der Wasserwirtschaft in urbanen Gebieten ist sowohl in der Forschung als auch in der Praxis neu. Zwischen der Bearbeitung eines Forschungsprojektes und eines Ingenieurprojektes gibt es grundsaetzliche Differenzen, trotzdem sind wir der Meinung, dass es bezueglich der interdisziplinaeren Aspekte und der ganzheitlichen Betrachtung der Wasserwirtschaft sowohl in der Forschung als auch in der Praxis aehnliche Probleme gibt. Aus diesem Grunde wird in dieser Arbeit versucht ueber einige Erfahrungen aus dem interdisziplinaeren und ganzheitlichen Forschungsprojekt zu berichten. (orig.)

  7. Tortuosity and calcification of the splenic artery. More than an additional finding; Schlaengelung und Verkalkung der Milzarterie im Roentgenbild. Mehr als ein Nebenbefund

    Energy Technology Data Exchange (ETDEWEB)

    Golder, W.A. [SELARL Association d' Imagerie Medicale, Troyes (France)

    2008-11-15

    zwischen der Laenge des Gefaesses und der Distanz zwischen seinem Ursprung und dem Milzhilus hervorgerufen. Der proximale Abschnitt der Arterie ist haeufiger und staerker betroffen als der distale. Die Tortuositas wird durch die zum Hauptstamm senkrechte Verlaufsrichtung der grossen Aeste gefoerdert. Weder die Schlaengelung noch die Verkalkung sind als Risikoindikatoren fuer das vergleichsweise haeufige Aneurysma der Milzarterie zu werten. Der Wandkalk ist sowohl in der Tunica media wie im Endothel lokalisiert. Haemodynamisch wirksame kalkassoziierte Gefaessstenosen fehlen. Die verkalkende Atheromatose der Milzarterie aehnelt der Mediasklerose der peripheren Arterien vom Typ Moenckeberg und wird bei Diabetikern und Dialysepatienten ueberdurchschnittlich haeufig nachgewiesen. Die hydrohaemodynamische Theorie der Arteriosklerose kann nur fuer die quantitativ weniger bedeutsame Verkalkung der Intima verantwortlich gemacht werden. Die Blutspeicherfunktion der Milz foerdert die charakteristische altersabhaengige Form- und Verlaufsveraenderung der A. lienalis. (orig.)

  8. Mehr Mathematik Wagen in der Medizin

    Science.gov (United States)

    Deuflhard, Peter; Dössel, Olaf; Louis, Alfred K.; Zachow, Stefan

    In diesem Artikel wird an drei Erfolgsmodellen dargestellt, wie das Zusammenwirken von Mathematik und Medizin eine Entwicklung hin zu patientenspezifischen Modellen auf Basis moderner medizinischer Bildgebung angestoßen hat, die in naher Zukunft dynamisch weiter Raum greifen wird. Dabei existiert ein Gleichklang der Interessen von Medizin und Mathematik: Beide Disziplinen wollen die Resultate schnell und zuverlässig. Für die Klinik heißt dies, dass notwendige Rechnungen in möglichst kurzer Zeit, und zwar auf dem PC, ablaufen müssen und dass die Resultate so genau und belastbar sein müssen, dass medizinische Entscheidungen darauf aufbauen können. Für die Mathematik folgt daraus, dass höchste Anforderungen an die Effizienz der verwendeten Algorithmen und die darauf aufbauende Software in Numerik und Visualisierung zu stellen sind. Allerdings ist es noch ein weiter Weg, bis anatomische und medizinisch brauchbare funktionelle Modelle auch nur für die wichtigsten Körperteile und die häufigsten Krankheitsfälle verfügbar sein werden. Führende Universitätskliniken könnten, als Zentren einer interdisziplinären Kooperation von Medizinern, Ingenieuren und Mathematikern, eine Vorreiterrolle dabei übernehmen, mehr Mathematik in der Medizin zu wagen. Dies wäre zweifellos ein wichtiger Schritt in Richtung auf eine individuelle quantitative Medizin, bei dem Deutschland die besten Voraussetzungen hätte, die Rolle des "Schrittmachers“ zu übernehmen.

  9. Muttersprache im Fremdsprachenunterricht - mehr als ein Ausweichmanöver?

    OpenAIRE

    Ciepielewska, Luiza

    2008-01-01

    The article deals with the role of the native language in a foreign language class. The practical aspects of moderate native language usage are discussed. Using concrete examples, the author discusses the positive influence of a native language on communication during foreign language class.

  10. Hashimoto-Thyreoiditis: Mehr als nur Schilddrüsenhormonmangel?

    Directory of Open Access Journals (Sweden)

    Führer D

    2010-01-01

    Full Text Available Eine Autoimmunthyreoiditis wird häufig mit einer Vielzahl von Beschwerden in Verbindung gebracht. Die Gründe hierfür sind vielgestaltig. Neue Erkenntnisse zum Wirkmechanismus von Schilddrüsenhormonen im zentralen Nervensystem stellen erstmals eine mögliche molekulare Erklärung für individuell unterschiedliche neurokognitive Manifestationen von Schilddrüsenfunktionsstörungen dar und könnten deshalb auch ein unterschiedliches Ansprechen auf eine Schilddrüsenhormonsubstitutionstherapie "trotz Euthyreose" bei Patienten mit Hashimoto- Thyreoiditis und anderen Ursachen einer Hypothyreose erklären.

  11. Headaches. More than just sinusitis; Kopfschmerzen. Mehr als nur Sinusitis

    Energy Technology Data Exchange (ETDEWEB)

    Knauth, Michael [Universitaetsklinikum Goettingen (Germany). Abt. Neuroradiologie

    2011-09-15

    Headaches are among the commonest somatic complaints seen in clinical practice. The International Headache Society differentiates about 190 types of headaches. This article focuses on the variety of secondary headaches with a radiologically identifiable cause. (orig.)

  12. Presseinformationen im Informationsdienst Wissenschaft "idw" nicht mehr über die AWMF?

    OpenAIRE

    Müller, W

    2007-01-01

    Der Informationsdienst Wissenschaft idw - eine Gemeinschaftseinrichtung vieler Hochschulen und wissenschaftlicher Einrichtungen, darunter auch die AWMF - erlaubt es nicht mehr, dass (Dach-)Verbände Meldungen von rechtlich selbständigen Mitgliedern in den idw einspeisen. Diese sollen selbst Mitglied im idw werden.

  13. Linnamaastike kaitse on osa arengust / Jukka Jokilehto, Mehr Azar Soheil ; intervjueerinud Liisa Pakosta

    Index Scriptorium Estoniae

    Jokilehto, Jukka

    2010-01-01

    Vestlus soome arhitekti, Nova Gorica ülikooli professori, UNESCO ja ICOMOSi konsultandi Jukka Jokilehto ja tema abikaasa, pärslannast arhitekti Mehr Azar Soheiliga. Ka Tallinna vanalinnast maailmapärandi komitees valmivate linnamaastike kaitseks mõeldud soovituste valguses, linna arengust sadama suunas. Eestikeelsena ilmus J. Jokilehto raamat "Arhitektuuri konserveerimise ajalugu" (Tallinn : Eesti Kunstiakadeemia, 2010)

  14. Neue Welle an IFRS: Wechseln schon bald mehr Firmen zu Swiss GAAP FER?

    OpenAIRE

    Sager, Marc; Vial, Jérôme

    2016-01-01

    Seit 2008 wechseln an der SIX kotierte Firmen vermehrt den Rechnungslegungsstandard von den IFRS zu Swiss GAAP FER (FER). Mit IFRS 9 (Finanzinstrumente), IFRS 15 (Erlöse aus Verträgen mit Kunden) und IFRS 16 (Leasingverhältnisse) werden die Anwender einmal mehr mit weitreichenden Änderungen konfrontiert.

  15. Investigating the Relationship between Purposeful Organizational Forgetting and Organizational Agility in MehrEghtesad Bank of Mazandaran Province

    OpenAIRE

    Seyed Vahid Hashemi; Reza Shahverdi

    2016-01-01

    Today's organizations consider knowledge management as an essential factor for the stability and their success and to complete organizational learning, forgetting is an important tool that managers apply it, to form an organizational knowledge. The aim of this study was to investigating the relationship between purposeful organizational forgetting and organizational agility in Mehr Eghtesad bank of Mazandaran province. The population of this study was 150 people of staff and managers of Mehr ...

  16. Use of fuel cells in multi-MW-thermal power plants; Brennstoffzelleneinsatz im Mehr-MW-Heizkraftwerk

    Energy Technology Data Exchange (ETDEWEB)

    Lezuo, A. [Siemens AG, Erlangen (Germany); Knappstein, H. [Thyssengas GmbH, Duisburg (Germany); Langnickel, U. [Gas-, Elektrizitaets- und Wasserwerke Koeln AG (GEW) (Germany); Nymoen, H. [Ruhrgas AG, Essen (Germany)

    1995-09-01

    Natural gas fuel cells with phosphoric acid electrolyte today are already used in small series of compact units ranging up to 500 kW electric capacity. They thus represent a successful contribution to decentralised power production through cogeneration. Their use in multi-MW thermal power stations is technically possible and, in view of their low emissions and great efficiency, a very attractive alternative. This technology merits intensive development work in order to acquire through practical experience the know-how for bringing costs down to an acceptable level. Manufacturers and operators will need to prepare themselves for modifications regarding the operation and maintenance of these larger plants. The results of a feasibility study for a 1.5 MW thermal power plant presented in this article could come in useful here. (orig.) [Deutsch] Erdgasbetriebene Brennstoffzellen mit Phosphorsaeure-Elektrolyt werden heute bereits in Kleinserien als kompakte Einheiten mit einer elektrischen Leistung von bis zu 500 kW gebaut und mit Erfolg in der dezentralen Energieerzeugung auf Basis der Kraft-Waerme-Kopplung betrieben. Der Einsatz in Mehr-MW-Heizkraftwerken ist ebenfalls moeglich und sollte unter dem Aspekt einer schadstoffarmen und effizienten Energieerzeugung intensiv weiter verfolgt werden, um ueber die gewonnenen Erfahrungen die angestrebten Kostenziele zu erreichen. Technologiebedingt muessen sich Hersteller und Betreiber auf die veraenderten Anforderungen bezueglich Betrieb und Wartung rechtzeitig einstellen. Die nachfolgend vorgestellten Ergebnisse einer Machbarkeitsstudie fuer ein 1,5-MW-Heizkraftwerk koennen dabei hilfreich sein. (orig.)

  17. More than 85 per cent. A practice report; Mehr als 85 Prozent. Ein Praxisreport

    Energy Technology Data Exchange (ETDEWEB)

    Jakobi, Manuela [Centrosolar AG, Muenchen (Germany)

    2013-11-01

    The Electric House Brenner in Herrenberg achieved with a lithium battery storage facility on sunny days 100 % self-sufficiency. [German] Das Elektrohaus Brenner in Herrenberg erreicht mit einer Lithiumbatterie-Speicheranlage an sonnigen Tagen 100 % Autarkie.

  18. More than only heat protection. Heat insulation composite systems; Mehr als nur Waermeschutz. Waermedaemmverbundsysteme

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    2012-07-01

    Thermal energy composite systems are used in order to protect the outer walls of buildings against heat losses. The contribution under consideration reports on the advantages of such composite systems. Such a thermal energy composite system should be utilized only if it is certificated by the Centre of Competence in Civil Engineering (Berlin, Federal Republic of Germany). The single components of the thermal energy composite system as well as their processing are regulated in this certification.

  19. Mehr als eine politische Lehrstunde : V. Baltische Studenten-Seminar in Darmstadt

    Index Scriptorium Estoniae

    2010-01-01

    16.-21. novembrini 2010 toimunud viienda balti üliõpilasseminari keskpunktis oli teemadekompleks demokraatiast Baltimaades. Arutleti ka demokraatiakogemuse üle kahel viimasel sajandil Saksamaal. Jugendherberges alanud seminar jätkus Darmstadtis ja lõppes Saksa-Balti Seltsi 60nda juubeli tähistamisega. Viie päeva temaatika haaras Baltimaade ja Euroopa kultuuri, poliitikat ja ajalugu

  20. A review on weaknesses and strengths of delivering Mehr housing project in terms of achieving economical goals

    Directory of Open Access Journals (Sweden)

    Ali Karshenasan

    2013-09-01

    Full Text Available Housing is one of the most important sections of development in a country and its economic importance has put it in the center of attention. It can cause rise and depression of habitation by its extended economic aspects. Mehr Housing plan is a state run housing project in most cities started 2007 in Iran to protect and provide cheap housing for poor people and young couples. Mehr housing project by its large scale and wide dimensions can affect the society’s economy. Therefore, to investigate weaknesses and strengths of this project in terms of economic and applying necessary reformation can increase the success probability of this project. For this purpose, this study assess the weaknesses and strengths of Mehr housing of province of Khorram Abad in Iran for achieving economic goals and also presents solutions to better access to these goals. Time scope of the present study is 6 months of 2011 and the second 3 months of 2012. The methodology is applicable in terms of goal and is descriptive survey in terms of nature. In this study, a combined method of interviewing to experts and distributing a questionnaire among the applicants of Mehr housing has been used for data collecting. Among strengths of Khorram Abad in economic section, employment and urban landfill pattern reformation can be implied. In addition, among weaknesses of this project are lack of proper first design and technical justification of the project and use of only 2 shabby fabrics.

  1. Investigating the Relationship between Purposeful Organizational Forgetting and Organizational Agility in MehrEghtesad Bank of Mazandaran Province

    Directory of Open Access Journals (Sweden)

    Seyed Vahid Hashemi

    2016-06-01

    Full Text Available Today's organizations consider knowledge management as an essential factor for the stability and their success and to complete organizational learning, forgetting is an important tool that managers apply it, to form an organizational knowledge. The aim of this study was to investigating the relationship between purposeful organizational forgetting and organizational agility in Mehr Eghtesad bank of Mazandaran province. The population of this study was 150 people of staff and managers of Mehr Eghtesad bank of Mazandaran province, which among these were selected the number of 108 people for sample by using the Krejcie Morgan tables and simple random sampling. To collect the data has been using field and library study. The present study in terms of the purpose is the application and in terms of data collection are a descriptive study and correlation type, and use of two standard questionnaires, which questionnaire had adequate reliability, because the Cronbach's alpha coefficient is obtained 0.84. For data analysis has been used descriptive and inferential statistics. Also, to test the hypothesis, we used linear regression method and Pearson correlation coefficient at the 0.95 confidence level, which results of these studies indicate that there is a relationship between purposeful organizational forgetting and organizational agility, and dimensions of organizational forgetting can predict agility in bank Mehr Eghtesad bank of Mazandaran province.

  2. Ganzheitliche Produktionssysteme

    Science.gov (United States)

    Korge, Axel; Lentes, Hans-Peter; Wengler, Michael; Hartmann, Thorsten; Röhrle, Josef; Kammüller, Mathias

    Erfolgreiche Unternehmer machen es vor: Mit einem Ganzheitlichen Produktionssystem (GPS) haben sie ihre Produktivität mehr als verdoppelt, die Durchlaufzeit bei verbesserter Termintreue halbiert und die Fehlerquote in den Promille-Bereich gedrückt [1]. Der Ansatz ist: Innovative Organisationsmethoden, die sich als Best-practice-Lösungen bewährt haben, werden zu einem in sich abgestimmten Gesamtsystem konfiguriert. Durch eine geeignete Auswahl und die gezielte Abstimmung geeigneter Methoden aufeinander können die drei Erfolgsfaktoren Qualität, Zeit und Kosten gleichzeitig erfüllt werden. Ein Ganzheitliches Produktionssystem versetzt die Produktionsmitarbeiter und Führungskräfte in die Lage, bessere Leistungsergebnisse mit weniger Stress zu erbringen. "Das ist nicht wirklich schwierig“, betont Josef Röhrle, der Werkleiter von Siemens Erlangen, Preisträger der Besten Fabrik 2004 und 2006, "denn alle Methoden sind bekannt und beschrieben.“

  3. EU ecodesign regulation. More as only a light bulb ban; EU-Oekodesign-Richtlinie. Mehr als ein Gluehbirnenverbot

    Energy Technology Data Exchange (ETDEWEB)

    Fischer, Corinna [Oeko-Institut e.V., Freiburg (Germany)

    2011-10-15

    Within a broader public, the EU Ecodesign Directive (Directive 2009/125/EC) was known and notoriously as a 'light bulb ban'. This resulted in strong emotions. But it has shown an impact in many other areas - usually unnoticed and often for the financial and practical benefits of the consumers. Now, the EU Commission wants to go one step further.

  4. Heat recovery gain more than doubled. Heat recovery system controller; Rueckwaermezahl mehr als verdoppelt. WRG-Controller

    Energy Technology Data Exchange (ETDEWEB)

    Voit, Christian [Kulle und Hofstetter, TGA Consulting, Muenchen (Germany); Niederer, Martin [Konvekta AG, St. Gallen (Switzerland)

    2009-03-15

    The hospital at Munich-Bogenhausen, which is a top level hospital with more than 1000 beds, modernised its heat recovery system first installed in the eighties of last century. A modern high-efficiency integrated recirculation system was installed instead. The system has a novel heat recovery controller which not only detects deviations from optimal operation but also identifies the causes. The system supplier, Konvekta AG of St.Gallen, Switzerland, is able to guarantee a heat recovery rate of 87 percent on a long-term basis. The energy cost for preheating of the ambient air was reduced by 78 percent as compared to the original system. (orig.)

  5. CCSVI - Ein Erfahrungsbericht: Mehr Fragen als Antworten - mit einem Kommentar aus neurologischer Sicht von W. Lang, Wien

    Directory of Open Access Journals (Sweden)

    Peloschek P

    2011-01-01

    Full Text Available Obwohl schon seit über 100 Jahren bekannt ist, dass durch nahezu jeden demyelinisierten Herd (Plaque bei Multipler Sklerose (MS ein Blutgefäß läuft, konnte bisher kein kausaler Zusammenhang zwischen einer Erkrankung der zerebralen Venen und MS dargestellt werden. Nach der Beschreibung des Syndroms der chronischen zerebrospinalen venösen Insuffizienz (CCSVI im Jahr 2008 entwickelte sich ein, durch neuen Medien (Google, Facebook, Blogs etc. potenzierter, außergewöhnlich hoher Druck vonseiten zahlreicher Patientengruppen auf Ärzteschaft und Industrie, der hoffnungsgebenden Hypothese einer durch CCSVI bedingten „venösen MS“ nachzugehen. Dieser Bericht soll einen nüchternen Überblick über die fraglich ursächliche Beteiligung der Venen geben, um dem Leser die Möglichkeit zu geben, sich ein eigenes Bild zu machen.

  6. No rival for Thomas Alva Edison. Light deflection systems are gaining ground in Germany; (Keine) Konkurrenz fuer Thomas Alva Edison. Lichtleitsysteme gewinnen auch in Deutschland immer mehr Liebhaber

    Energy Technology Data Exchange (ETDEWEB)

    Horbelt, A.

    2002-02-01

    Increasingly, German builder-owners are getting interested in light deflection systems that ensure daylighting in all parts of buildings. [German] Immer mehr Hausbesitzer interessieren sich fuer Lichtleitsysteme, um auch in die entlegensten Ecken des Gebaeudes noch Tageslicht zu bekommen. (orig.)

  7. Analysis the opportunities and threats of Mehr Housing in Mashhad Metropolis (A case of Golbahar New Town

    Directory of Open Access Journals (Sweden)

    Hadi Ivani

    2014-12-01

    Full Text Available In recent years, the construction industry has been thriving due to an increase in national and international investment to the extent that it is now the largest in the Middle East region. In order to, the aim of current research is analysis the opportunities and threats of Mehr Housing in Mashhad Metropolis with point on Golbahar New Town housing project. Applied methodology is based on libraries, documents and field study. In the case of library, data were collected by studying books, articles and internet. In continuous it was used of interview and questionnaire for complete the data’s. Results show that 70 percent of the Iranians own homes, with huge amounts of idle money entering the housing market and the annual turnover in the construction industry amounts to 38.4 billion US$

  8. Computed tomography guidance. Fluoroscopy and more; CT-Steuerung. Fluoroskopie und mehr

    Energy Technology Data Exchange (ETDEWEB)

    Paprottka, P.M.; Reiser, M.F.; Trumm, C.G. [Klinikum der Ludwig-Maximilians-Universitaet Muenchen, Campus Grosshadern, Angiographie und Interventionelle Radiologie, Institut fuer Klinische Radiologie, Muenchen (Germany); Helmberger, T. [Staedt. Klinikum Muenchen, Klinikum Bogenhausen, Institut fuer Diagnostische und Interventionelle Radiologie, Neuroradiologie und Nuklearmedizin, Muenchen (Germany)

    2013-11-15

    Although ultrasound and magnetic resonance imaging are competitive imaging modalities for the guidance of needle-based interventions, computed tomography (CT) is the only modality suitable for image-guided interventions in all regions of the body, including the lungs and bone. The ongoing technical development of CT involves accelerated image acquisition, significantly improved spatial resolution, CT scanners with an extended gantry diameter, acceleration of the procedure through joystick control of relevant functions of interventional CT by the interventional radiologist and tube current modulation to protect the hands of the examiner and radiosensitive organs of the patient. CT fluoroscopy can be used as a real-time method (the intervention is monitored under continuous CT fluoroscopy) or as a quick check method (repeated acquisitions of individual CT fluoroscopic images after each change of needle or table position). For the two approaches, multislice CT fluoroscopy (MSCTF) technique with wide detectors is particularly useful because even in the case of needle deviation from the center slice the needle tip is simultaneously visualised in the neighboring slices. With the aid of this technique a precise placement of interventional devices is possible even in angled access routes and in the presence of pronounced respiratory organ movements. As the reduction of CT fluoroscopy time significantly reduces radiation exposure for the patient and staff, the combination of a quick check technique and a low milliampere technique with multislice CT fluoroscopy devices is advantageous. (orig.) [German] Obwohl sonographisch und magnetresonanztomographisch gesteuerte Interventionen ernstzunehmende Konkurrenzverfahren sind, kann die Computertomographie als einzige bildgebende Modalitaet zur Steuerung von Interventionen in allen Koerperregionen (einschliesslich Lunge und Knochen) eingesetzt werden. Die technischen Weiterentwicklungen der Computertomographie beinhalten eine

  9. Gratis Online Lernen – 100 Empfehlungen und mehr von Lehrenden für Lehrendea

    Directory of Open Access Journals (Sweden)

    Angelika Güttl-Strahlhofer

    2015-09-01

    Full Text Available Im Rahmen der Lehrveranstaltungs­reihe "Open Air" lud die Arbeitsgemeinschaft Güttl/Krisper/Röthler im WS 14/15 LehrerInnen zum Besuch des MOOCs "Gratis Online Lernen" der steirischen Plattform iMooX ein. Elf TeilnehmerInnen waren bereit, im Anschluss an die Teilnahme am Kurs ihre Erkenntnisse in ein Gemeinschaftswerk einfließen zu lassen, dessen Entstehung in der digitalen Werkstatt koordiniert wurde (Adobe Connect und Moodle. Aus der Überzeugung heraus, dass das gemeinsame Besuchen eines solchen Online-Kurses nur ein Teil eines Lernerlebnisses sein kann und das gemeinsame Erarbeiten für die Teilnehmerinnen und Teilnehmer ein zusätzlicher Schritt zum Überblicken der schier unendlichen Angebotslandschaft darstellt. Diese diskutierten, entwickelten, verwarfen und evaluierten interessante Lernangebote. Vorbild war sowohl für den Entstehungsprozess als auch für das Ergebnis der Schummelzettel "Urheberrecht und OER". http://www.virtuelle-ph.at/mod/page/view.php?id=32645.

  10. Instandhaltungsmanagement als Gestaltungsfeld Ganzheitlicher Produktionssysteme

    Science.gov (United States)

    Dombrowski, Uwe; Schulze, Sven; Otano, Isabel Crespo

    Sich kontinuierlich verändernde Rahmenbedingungen, wie beispielsweise eine steigende Variantenvielfalt, verkürzte Produktlebenszyklen sowie Kundenforderungen nach höherer Qualität, kürzeren Lieferzeiten und geringeren Kosten, fordern von produzierenden Unternehmen eine stetige Anpassung der Prozesse, der Organisation und der Strukturen. Seit den 90er Jahren versuchen immer mehr deutsche Unternehmen diesen veränderten Anforderungen mit der Einführung eines Ganzheitlichen Produktionssystems (GPS) zu begegnen. Ganzheitliche Produktionssysteme sind dabei in ihren Grundlagen an das Toyota Produktionssystem angelehnt, vereinigen aber auch weitere Methoden zu einem unternehmensspezifischen Regelwerk. Im Rahmen des langfristigen Trends zu unternehmensindividuellen Produktionssystemen wird sowohl in der Industrie als auch in der Forschung intensiv über das Toyota Produktionssystem, Lean Production, Lean Management und Ganzheitliche Produktionssysteme diskutiert, werden Konzepte zu Implementierung und Betrieb erstellt und die Wirtschaftlichkeit untersucht.

  11. Simultaneous whole-body PET-MRI in pediatric oncology. More than just reducing radiation?; Simultane Ganzkoerper-PET-MRT in der paediatrischen Onkologie. Mehr als nur Strahlenersparnis

    Energy Technology Data Exchange (ETDEWEB)

    Gatidis, S.; Gueckel, B.; Schaefer, J.F. [Universitaet Tuebingen, Radiologische Klinik, Diagnostische und Interventionelle Radiologie, Tuebingen (Germany); Fougere, C. la [Universitaet Tuebingen, Radiologische Klinik, Nuklearmedizin, Tuebingen (Germany); Schmitt, J. [Universitaet Tuebingen, Abteilung fuer Praeklinische Bildgebung und Radiopharmazie, Werner Siemens Imaging Center, Tuebingen (Germany)

    2016-07-15

    Diagnostic imaging plays an essential role in pediatric oncology with regard to diagnosis, therapy-planning, and the follow-up of solid tumors. The current imaging standard in pediatric oncology includes a variety of radiological and nuclear medicine imaging modalities depending on the specific tumor entity. The introduction of combined simultaneous positron emission tomography (PET) and magnetic resonance imaging (MRI) has opened up new diagnostic options in pediatric oncology. This novel modality combines the excellent anatomical accuracy of MRI with the metabolic information of PET. In initial clinical studies, the technical feasibility and possible diagnostic advantages of combined PET-MRI have been in comparison with alternative imaging techniques. It was shown that a reduction in radiation exposure of up to 70 % is achievable compared with PET-CT. Furthermore, it has been shown that the number of imaging studies necessary can be markedly reduced using combined PET-MRI. Owing to its limited availability, combined PET-MRI is currently not used as a routine procedure. However, this new modality has the potential to become the imaging reference standard in pediatric oncology in the future. This review article summarizes the central aspects of pediatric oncological PET-MRI based on existing literature. Typical pediatric oncological PET-MRI cases are also presented. (orig.) [German] Die bildgebende Diagnostik spielt in der paediatrischen Onkologie eine zentrale Rolle fuer die Diagnose, die Therapieplanung und die Nachsorge solider Tumoren. Der aktuell bildgebende Standard in der paediatrischen Onkologie sieht - abhaengig von der vorliegenden Tumorentitaet - eine Kombination mehrerer radiologischer und nuklearmedizinischer Verfahren vor. Die Einfuehrung der simultanen Positronenemissionstomographie(PET)-Magnetresonanztomographie (MRT) hat neuartige Moeglichkeiten der Diagnostik in der paediatrischen Onkologie eroeffnet. Dabei kombiniert dieses neue Verfahren die exzellente anatomische Genauigkeit der MRT mit metabolischen Informationen der PET. In ersten klinischen Studien wurden die technische Durchfuehrbarkeit sowie moegliche diagnostische Vorteile der kombinierten PET-MRT gegenueber alternativen Methoden aufgezeigt. So kann die Anwendung der kombinierten PET-MRT zu einer Reduktion der Strahlenexposition im Vergleich zur PET-Computertomographie um bis zu 70 % gesenkt werden. Zudem wurde gezeigt, dass die Anwendung der PET-MRT zu einer Reduktion der Anzahl notwendiger Untersuchungen fuehren kann. Aufgrund der geringen Verfuegbarkeit stellt die kombinierte PET-MRT aktuell kein Routineverfahren dar. Dennoch hat diese neuartige Modalitaet das Potenzial, sich zum bildgebenden Referenzstandard in der paediatrischen Onkologie zu entwickeln. Im vorliegenden Uebersichtsbeitrag werden anhand der verfuegbaren Literatur zentrale Aspekte der paediatrisch onkologischen PET-MRT-Bildgebung dargestellt. Zusaetzlich werden typische Anwendungsfaelle der paediatrischen PET-MRT praesentiert. (orig.)

  12. More questions than answers. The repowering according to the EEG novella 2009; Mehr Fragen als Antworten. Das Repowering nach dem EEG 2009

    Energy Technology Data Exchange (ETDEWEB)

    Schomerus, Thomas [Leuphana Univ., Lueneburg (Germany). Umwelt- und Energierecht; Southampton Solent Univ. (United Kingdom); Stecher, Michaela [Leuphana Univ., Lueneburg (Germany). Umwelt- und Energierecht

    2009-09-15

    The repowering is the substitution of already existing old facilities by new wind power systems. An own paragraph was dedicated to the repowering in the EEG novella 2009. With the amendment of the law, the remuneration for the electricity which is produced at onshore wind power systems, repowering systems and offshore plants is regulated in their own standard in each case. The legal supplements and new regulations partly have getting straight functions. However, they also result in a number of new legal questions. The authors of the contribution under consideration report on these legal questions and present solutions. After short remarks to the legal questions of the repowering, the requirements of paragraph 30 at repowering plants and the defaults for old facilities are presented.

  13. Employability ("Beschäftigungsfähigkeit") als Herausforderung für den Arbeitsmarkt : auf dem Weg zur flexiblen Erwerbsgesellschaft ; eine Konzept- und Literaturstudie

    OpenAIRE

    Blancke, Susanne; Roth, Christian; Schmid, Josef

    2000-01-01

    Das vorliegende Arbeitspapier diskutiert das Konzept der "Beschäftigungsfähigkeit" als dynamische Arbeitsmarktstrategie. Das zentrale Argument ist, dass Strategien zur Schaffung von mehr Beschäftigung in Deutschland auf eine Dynamisierung und Flexibilisierung der Arbeitsmärkte zielen müssen. Um diese Prozesse anzuregen und gleichzeitig den Erwerbspersonen neue Sicherheit zu bieten, ist es notwendig, die erwerbsstrukturierenden Institutionen zu reorganisieren. Der Einzelne muss durch (lebensla...

  14. Lebensgeschichten aus der Fremde. Autobiografien deutschsprachiger emigrierter SchriftstellerInnen als Beispiele literarischer Akkulturation nach 1933

    Directory of Open Access Journals (Sweden)

    Robert Krause

    2010-12-01

    Full Text Available Mit der Massenauswanderung aus Deutschland und Europa zwischen 1933 und 1941 nahmen Flucht- und Lebenswege ihren Ausgang, die in zahlreichen Fällen nie mehr zurück in die verlassene Heimat, sondern vielmehr zu einer neuen persönlichen, gesellschaftlichen und kulturellen Existenz führten. Etliche solcher Lebensgeschichten aus der Fremde werden durch autobiografische Texte bezeugt und tragen als Erinnerungen bis heute zum kulturellen Gedächtnis und zur kollektiven Identität der Nachkriegsgesell...

  15. Higher power - BMW uses PowerVIZ for interactive visualization of CFD data; Sichtlich mehr Leistung - BMW visualisiert CFD-Daten interaktiv mit PowerVIZ

    Energy Technology Data Exchange (ETDEWEB)

    Kobras, D.

    2002-11-01

    The Aerodynamics and Thermal Engineering Department of BMW AG uses the Power VIZ post processor as a standard tool for visualization of flow calculations. The program was developed by science + computing ag (s+C) for the CFD software PowerFLOW of the EXA company. Apart from perfect co-ordination with the solver, the software has the advantage of real time operation. [German] Die Hauptabteilung 'Aerodynamik und Waermetechnik' der BMW AG setzt den Postprozessor PowerVIZ als Standardtool zur Visualisierung von Stroemungsberechnungen ein. Das Programm kommt vom IT-Dienstleistungs- und Softwarehaus science + computing ag (s+c) und ist massgeschneidert fuer die CFD-Software PowerFLOW der Firma EXA. Perfektes Zusammenspiel mit dem Solver ist nur ein Vorteil, den die BMW-Ingenieure schaetzen. Denn vor allem erlaubt PowerVIZ das Arbeiten in Echtzeit. (orig.)

  16. Regionalökonomische Effekte des Emscherumbaus: Mit einem Investitionsvolumen von mehr als 4,5 Mrd. € ist der Emscherumbau eines der größten Infrastrukturprojekte Europas

    OpenAIRE

    Neumann, Uwe

    2014-01-01

    Das Entwicklungskonzept „Masterplan Emscher-Zukunft“ bildet die Leitlinie für den Emscherumbau und die damit zusammenhängende Revitalisierung der Region. Das RWI wurde mit einer Untersuchung beauftragt, die für den Gesamtzeitraum 1991-2020 die regionalwirtschaftlichen Auswirkungen der wasserwirtschaftlichen Infrastrukturmaßnahmen aufzeigt und darüber hinaus am Beispiel des Immobilienmarkts einen ersten Schritt zur Evaluation der weiter gehenden Auswirkungen unternimmt.

  17. What do we know more than 2012 on the accident progression in Fukushima? What is the actual state of the plant?; Was wissen wir heute mehr als 2012 ueber den Unfallablauf in Fukushima? Wie ist der heutige Zustand der Anlage?

    Energy Technology Data Exchange (ETDEWEB)

    Maqua, Michael [Gesellschaft fuer Anlagen- und Reaktorsicherheit (GRS) mbH, Koeln (Germany)

    2015-06-01

    The contribution includes the official statistics on the accident following the earthquake and tsunami on March 11, 2011 on the Japanese island Honshu and the nuclear power plant Fukushima Daiichi. The plant was automatically shutdown as consequence of the earthquake. New calculations allow the reconstruction of the accident progress and the meltdown. Estimations of the released radioactivity, esp. the radionuclides I-131 and Cs-137 into the atmosphere and the ocean are summarized. The construction of water cleaning facilities for the contaminated waste water in the leaking tanks, water-tight barriers and the planning for the enclosure for the destroyed reactor buildings are described.

  18. The year of the tiger. In 2010, China produced more solar cells than in the four years before taken together; Das Jahr des Tigers. 2010 wurden mehr Solarzellen produziert als in den vier vorherigen Jahren zusammen

    Energy Technology Data Exchange (ETDEWEB)

    Hering, Garrett

    2011-04-15

    In 2010, solar cells with a total capacity of 27 gigawatt were produced world-wide, i.e. more than twice as much as in 2009. The world's biggest producer is the Chinese Suntech group. The runner-up, JA Solar, is another Chinese company. In all, the country managed to expand its dominant position; in 2010, China supplied nearly half of all solar cells produced world-wide. Taiwan came in second, Germany had third place, and Japan fourth place.

  19. Culture and Healthcare in Medical Education: Migrants' Health and Beyond [Medizin und ethnisch-kulturelle Vielfalt in der medizinischen Ausbildung: "Migrantenmedizin" und mehr

    Directory of Open Access Journals (Sweden)

    Soydan, Nedim

    2010-05-01

    Full Text Available [english] One of the main challenges for teaching programs on immigration, ethnic diversity and health is to transform the commonplace notion of “culture” into a helpful tool for medical training and practice. This paper presents the teaching approach of an interdisciplinary course on “migrants’ health” established at the University of Giessen since 2004, which has recently been complemented by a thematically related collaboration with two universities in Latin America (Ecuador, Peru. The overall goal is to translate the abstract philosophy of into medical practice, and to provide students with the insights, attitudes and skills needed for a fruitful use of concepts like “culture”, “ethnicity” and “migration background”. A key feature of the course is the strong commitment to ethnography as an important means for looking under the surface of superficial attributions to culture, and for grasping the interplay of medicine and health with cultural, social, religious, economic and legal aspects in its particular local and/or individual shape. Three elements of the course are presented to illustrate this approach: First, a unit on Islam and Medicine, as important parts of the local immigrant community are Muslims. The second one deals with psychosomatic aspects, because in case of immigrants, complex symptoms and disease representations like somatisation are easily misinterpreted as “cultural”. The third element consists of a unit with specialized social workers form outside the university, who provide direct insights into the living conditions and health problems of local immigrant communities. [german] Eine der zentralen Herausforderungen für Lehrprojekte zum Thema Medizin und ethnisch-kulturelle Vielfalt besteht in der Vermittlung eines angemessenen Konzepts von „Kultur“. Vor allem gilt es, den exklusiven Fokus auf als „fremd“ wahrgenommene Bevölkerungsgruppen und die Gefahr oberflächlicher kulturelle

  20. Wie kommt mehr "Familie" in die "Work-Life-Balance"? – Familienorientierung in der medizinischen Aus-, Weiterbildung und Berufstätigkeit [How to add more "Family" to the Work-Life-Balance? – Family Friendliness in Medical Under- and Postgraduate Studies and the Workplace

    Directory of Open Access Journals (Sweden)

    De Ridder, Daniela

    2012-04-01

    Full Text Available [english] Today universities have to compete for the best brains more than ever before. The issues of reconciliation of work/study and family and the work-life balance have become increasingly important recently in higher education policy development as higher education institutions in the competition for the best minds are already forced to tackle these issues, some of which are still novel to them, as they are faced with demographic change. High dropout rates among students with children, increasing shortages of physicians and high sector emigration and high levels of childlessness among graduates serve as indicators for urgent action towards more family-oriented university and faculty strategies.But how can medical schools, hospitals and (teaching hospitals achieve a family-oriented profile? Which key players, which areas of higher education management are relevant to management and decision-making structures? What exemplary measures for designing family-friendly medical studies and work places offer success?The underrepresentation of women in the next generation of scientists also poses an additional challenge to the development of an innovative higher education policy if it is to be sustainable. Thus strategies promoting the next generation and family orientation are key factors for a future-oriented higher education policy. These factors should therefore be seen as leadership strategies which will introduce measures that will make (redesign the university’s profile. To this end, a holistic approach which will lead to fundamental reforms of higher education structures which are outlined below and illustrated with examples are a prerequisite for successful implementation.[german] Hochschulen stehen mehr denn je im Wettbewerb um kluge Köpfe. Die Themen „Vereinbarkeit von Beruf/Studium und Familie“ und „Work-Life-Balance“ haben daher in der jüngsten hochschulpolitischen Entwicklung an Dynamik und Triebkraft gewonnen: Hochschulen im

  1. More out of less; Mehr aus weniger

    Energy Technology Data Exchange (ETDEWEB)

    Wiedemann, Karsten

    2012-06-15

    Biogas is a flexible energy source which may make an important contribution to the German energy turnaround. However, the increasing land use is criticized by many. The industry is now looking for higher efficiency.

  2. Vom Kreisverkehr zum Karussell: Nicht-Orte als komische Spielräume bei Jacques Tati

    Directory of Open Access Journals (Sweden)

    Wolfram Nitsch

    2016-03-01

    Full Text Available Marc Augés Begriff der ‹Nicht-Orte› hat in verschiedenen Disziplinen Karriere gemacht und dabei eine weitreichende Schattierung erfahren, teils durch den Autor selbst, teils durch kritische Leser. Nuanciert wurde er vor allem in zeitlicher, historischer und perspektivischer Hinsicht: zeitlich durch die Unterscheidung zwischen ‹heißen› und ‹kalten› Orten, die durch Zufuhr oder Verlust von Energie ineinander übergehen; histo­risch durch Fallstudien zu Orten wie der Pariser Metro, die sich immer mehr von einem ‹Erinne­rungs­ort› zu einem ‹Nicht-Ort› wandelt; perspektivisch dadurch, dass man verschiedene Blicke auf denselben Transitraum und verschiedene Praktiken seiner Nutzung einander gegenüberstellt. Solche Schattierungen treten besonders hervor, wo ‹Nicht-Orte› als filmische Schauplätze fungieren. Dies ist vielfach im neueren französi­schen Kino, aber auch schon bei Jacques Tati der Fall, besonders in seinem visionären Film Playtime (1967. Dort, so meine These, werden hyperbolisch zugespitzte ‹Nicht-Orte› nicht mehr wie noch in Mon oncle persönlicheren ‹Gegenorten› gegenübergestellt, sondern ihrerseits in komische Spielräume verwandelt. Ein schlagendes Beispiel dafür bietet der am Filmende gezeigte Kreisverkehr, eigentlich ein urbaner Durchgangsraum par excellence, der hier jedoch Züge eines Karussells annimmt und somit auf die Herkunft des Kinos aus der populären Heterotopie des Jahrmarkts zurückverweist.

  3. Der Glaube als Erkenntnisquelle Belief as the source of knowledge

    Directory of Open Access Journals (Sweden)

    Andrea Hartwig

    2004-03-01

    Full Text Available Seit ihrer Kanonisation 1998 und Ernennung zur Mit-Patronin Europas 1999 steht die 1942 in Auschwitz ermordete Phänomenologin Edith Stein, 1922 vom jüdischen zum christlichen Glauben konvertiert und 1933 als Benedicta vom Kreuz in den Kölner Karmel eingetreten, mehr denn je im Blickfeld der Öffentlichkeit. Die Bedeutung ihrer wissenschaftlichen Arbeit u. a. als Assistentin von Edmund Husserl in Freiburg und als Dozentin am Deutschen Institut für wissenschaftliche Pädagogik in Münster, aber auch in privaten Studien wurden im Juli 2000 im Rahmen eines Symposiums des Internationalen Edith Stein Instituts in Würzburg diskutiert. Die Beiträge der vorliegenden Publikation beleuchten breit gefächert Aspekte des Werks und seiner Interpretation mit dem Ziel, die Philosophin neu zu entdecken und die bisherige Forschung zu intensivieren.Since her canonisation and her appointment as Martyr and Co-Patroness of Europe in 1999, Edith Stein has, more than ever, been in the public eye. Murdered in Auschwitz in 1942, the phenomenologist converted from Judaism to Catholicism in 1922 and entered the Carmel of Cologne in 1933 as Teresa Benedicta of the Cross. In July 2000, at a symposium of the International Edith Stein Institute in Wurzburg, the significance of her academic work (among other things as an assistant to Edmund Husserl in Freiburg and as a lecturer at the German Institute for Pedagogy in Munster was discussed. The wide-ranging contributions in this publication highlight aspects of this work and its interpretation with the aim of rediscovering the philosopher and of intensifying research conducted to date.

  4. AL Amyloidosis

    Directory of Open Access Journals (Sweden)

    Desport Estelle

    2012-08-01

    Full Text Available Abstract Definition of the disease AL amyloidosis results from extra-cellular deposition of fibril-forming monoclonal immunoglobulin (Ig light chains (LC (most commonly of lambda isotype usually secreted by a small plasma cell clone. Most patients have evidence of isolated monoclonal gammopathy or smoldering myeloma, and the occurrence of AL amyloidosis in patients with symptomatic multiple myeloma or other B-cell lymphoproliferative disorders is unusual. The key event in the development of AL amyloidosis is the change in the secondary or tertiary structure of an abnormal monoclonal LC, which results in instable conformation. This conformational change is responsible for abnormal folding of the LC, rich in β leaves, which assemble into monomers that stack together to form amyloid fibrils. Epidemiology AL amyloidosis is the most common type of systemic amyloidois in developed countries with an estimated incidence of 9 cases/million inhabitant/year. The average age of diagnosed patients is 65 years and less than 10% of patients are under 50. Clinical description The clinical presentation is protean, because of the wide number of tissues or organs that may be affected. The most common presenting symptoms are asthenia and dyspnoea, which are poorly specific and may account for delayed diagnosis. Renal manifestations are the most frequent, affecting two thirds of patients at presentation. They are characterized by heavy proteinuria, with nephrotic syndrome and impaired renal function in half of the patients. Heart involvement, which is present at diagnosis in more than 50% of patients, leading to restrictive cardiopathy, is the most serious complication and engages prognosis. Diagnostic methods The diagnosis relies on pathological examination of an involved site showing Congo red-positive amyloid deposits, with typical apple-green birefringence under polarized light, that stain positive with an anti-LC antibody by immunohistochemistry and

  5. The transjugular portosystemic stent shunt (TIPSS) as an intervention in clinical complication of portal hypertension; Der transjugulaere portosystemische Stentshunt (TIPSS) als Intervention bei klinischen Komplikationen der portalen Hypertonie

    Energy Technology Data Exchange (ETDEWEB)

    Thalhammer, A.; Jacobi, V.; Schwarz, W.; Balzer, J.; Abolmaali, N.; Vogl, T.J. [Frankfurt Univ. (Germany). Zentrum der Radiologie

    2001-10-01

    Most frequent complications in patients with liver cirrhosis are due to portal hypertension. Beside ascites circumvent vessles formate with vasodilatation. Due to counterregulation a secondary hyperaldosteronism develops with release of vasocontrictive agents. If conservative and endoscopic methods fail, indication for building a portosystemic shunt is given. The TIPSS procedure is less invasive than the surgical method of Warren-Shunt, so the radiological intervention has replaced surgery. Reducing the portal pressure by the shunt, the clinical complications change for the better. Still problems are defined as hepatic encephalopathy and right ventricular heart failure. Regular follow up investigations have to be performed to detect complications in the shunt. Using regular clinical and radiological check up TIPSS is of clinical benefit with good long term results. (orig.) [German] Die haeufigsten Komplikationen bei Patienten mit einer Leberzirrhose lassen sich auf das Vorliegen einer portalen Hypertension zurueckfuehren. Neben einer Aszitesbildung kommt es zur Vasodilatation mit Ausbildung portaler Umgehungskreislaeufe, gegenregulatorisch zu einem sekundaeren Hyperaldosteronismus und Ausschuettung vasokonstriktiver Substanzen. Sind mittels konservativer und endoskopischer Methoden die Komplikationen nicht mehr zu beherrschen, ist die Indikation zur Shuntanlage gegeben. Wegen der geringeren Invasivitaet einer TIPSS-Anlage gegenueber der operativen Methode eines Warren-Shunts hat sich die interventionell radiologische Methodik in den letzten Jahren immer mehr durchgesetzt. Durch den mittels Shuntanlage reduzierten Pfortaderdruck kommt es zu einer deutlichen klinischen Besserung der unterschiedlichen Komplikationen. Als klinisch problematische Symptome bei der Shuntanlage sind die hepatische Enzephalopathie und eine Zunahme der Rechtsherzbelastung zu werten. Um Komplikationen im Bereich des Shunts frueh zu erkennen, muss dieser engmaschig kontrolliert werden. Unter

  6. Soziales Lernen als Baustein des Schulprogramms. Gymnasium Horn-Bad Meinberg, Nordrhein-Westfalen

    OpenAIRE

    Müller, Rolf

    2006-01-01

    Im Mittelpunkt des Konzeptes "Soziales Lernen" am Gymnasium Horn-Bad Meinberg stehen der Ausbau der sozialen Kompetenzen der Schüler/-innen, die Stärkung ihrer Selbstwahrnehmung und die Förderung ihrer Fähigkeiten in den Bereichen Kommunikation und Konfliktlösung. Die Schüler/-innen sollen mehr und mehr in der Lage sein, eigenverantwortlich zu handeln und die Bedürfnisse anderer zu berücksichtigen und zu respektieren.

  7. Abu al-Layth al-Libi

    Science.gov (United States)

    2015-02-01

    He has described at length the various methods to which the prisoners were subjected, including sleep depravation, nudity and the use of electrodes...suspects of the Riyadh bombing acknowledge their involvement on television , he was under the impression that they too had been subjugated to this... sleeping , al-Libi, al-Zawi and `Abd al-Karim managed to escape by jumping from the six-meter-tall wall of al-Ruways.38 Their breakout led to a

  8. Kurokawa's secret. Or: Why you need lemonade to feed more than 10 kW of solar power into the public grid; Kurokawas Geheimnis. Oder: Warum man in Japan Brause braucht, um mehr als zehn Kilowatt Solarstrom ans Netz zu bringen

    Energy Technology Data Exchange (ETDEWEB)

    Krause, Matthias B.

    2011-05-15

    Japan was among the first countries to think about solar power in gigawatt dimensions, but then the country opted increasingly for nuclear power. Now, after the earthquake and tsunami in March and with the ongoing nuclear catastrophe, there appears to be a renaissance of renewable energy sources and especially photovoltaic conversion. To make it happen, the government must take steps and permit competition in the energy market.

  9. More dynamics for the electrical network; Mehr Dynamik fuers Netz

    Energy Technology Data Exchange (ETDEWEB)

    Janzing, Bernward

    2013-06-15

    The available regulating energy in the power grid should in future be exactly matched to the demand. Researchers are working on analysis models in order to optimize the required amounts corresponding to the current weather situation and to save costs. [German] Die vorzuhaltende Regelleistung im Stromnetz soll kuenftig exakt auf den Bedarf abgestimmt sein. Forscher arbeiten an Analysemodellen, um die erforderlichen Mengen der aktuellen Wetterlage entsprechend taeglich neu zu optimieren und so Kosten zu sparen.

  10. 20 percent more yield; 20 Prozent mehr Ertrag

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    2013-06-15

    Interview with Tino Weber, director of Schmack Biogas GmbH, about the opportunities and prospects of bioenergy use by new concepts. [German] Interview mit Tino Weber, Geschaeftsfuehrer der Schmack Biogas GmbH, ueber Chancen und Perspektiven der Bioenergie durch neue Nutzungskonzepte.

  11. No way around green tariffs; Oekotarife sind nicht mehr wegzudenken

    Energy Technology Data Exchange (ETDEWEB)

    Briese, Dirk [trend:research GmbH, Stuttgart (Germany)

    2011-05-15

    Just like green electricity, meanwhile a classic, so too now does newcomer ''green gas'' offer energy suppliers with an appropriate marketing mix far-reaching opportunities for improving their corporate image, securing customer loyalty and increasing turnover. However the only beneficiaries of this trend to date have been green-only suppliers which specialise in this market. Although most traditional suppliers have now added green tariffs to their product portfolio, this has given them little commercial success, since eco-minded consumers often consider green-only suppliers to be more credible. A recent study shows that the market volume of green electricity and green gas tariffs will grow markedly over the next five years. Energy suppliers should therefore turn their attention to the question of how they can best exploit this potential.

  12. Mit Mathematik zu Mehr Intelligenz in der Logistik

    Science.gov (United States)

    Möhring, Rolf H.; Schenk, Michael

    Die Lösung logistischer Probleme ist ein wichtiger Aspekt menschlichen Handelns seit Menschen gemeinsam zielgerichtet tätig wurden. Die Grundlagen dessen, was wir heute Logistik nennen, entstammen dem militärischen Bereich. So basierte z. B. das römische Imperium in starkem Maße auf militärisch-logistischen Glanzleistungen. Ob damals bereits mathematische Überlegungen eine Rolle spielten, wissen wir heute nicht. Jedoch versuchte z. B. Napoleon, der mit den bedeutendsten Mathematikern seiner Zeit befreundet war, den Transport seiner Truppen und die Verbreitung von Informationen zu optimieren und strategisch einzusetzen.1,2

  13. Taugt der übersetzte Pamuk literarisch mehr?

    Directory of Open Access Journals (Sweden)

    Hikmet Tan

    2009-12-01

    Full Text Available Do Pamuk Translations Preserve Their Literariness – Orhan Pamuk, the frontrunner of his literature, is a writer who has been talked about his booms on various topics and political attitudes rather than what he has written. The discussions about the literal value and aesthetic quality of what he has written continue in a restricted frame and evaluations are being done about this topic according to the receptions taken from the translations in other languages. This situation –necessarily- bears this very fundamental question in mind: Is the literal-aesthetic quality of a writer understood better either in the original language in which the work is written or a in the languages to which it is translated? This short study looks for an answer to this very question in the German-translated version of the novel “Kar” (Snow.

  14. /Cu-Al System

    Science.gov (United States)

    Kish, Orel; Froumin, Natalya; Aizenshtein, Michael; Frage, Nachum

    2014-05-01

    Wettability and interfacial interaction of the Ta2O5/Cu-Al system were studied. Pure Cu does not wet the Ta2O5 substrate, and improved spreading is achieved when relatively a high fraction of the active element (~40 at.% Al) was added. The Al2O3 and AlTaO4 phases were observed at the Ta2O5/Cu-Al interface. A thermodynamic evaluation allowed us to suggest that the lack of wetting bellow 40 at.% Al is due to the presence of a native oxide, which covers the drop. The conditions of the native oxide decomposition and the formation of the volatile Al2O suboxide strongly depend on the vacuum level during sessile drop experiments and the composition of the Cu-Al alloy. In our case, Al contents greater than 40% provides thermodynamic conditions for the formation of Al2O (as a result of Al reaction with Al2O3) and the drop spreading. It was suggested that the final contact angle in the Ta2O5/Cu-Al system (50°) is determined by Ta adsorption on the newly formed alumina interlayer.

  15. Aussprache als motorische Fertigkeit

    DEFF Research Database (Denmark)

    Bonner, Maria

    2013-01-01

    Authentische Aussprache gilt im Fremdsprachenunterricht als schwer erreichbares Ziel, fremdsprachlicher Akzent wird als nahezu unvermeidbar gesehen. Weder die Hypothese einer kritischen Periode für den Erwerb einer authentischen Aussprache noch das Konzept der Fossilierung im Sprachlernprozess...

  16. Amyotrophic Lateral Sclerosis (ALS)

    Science.gov (United States)

    ... ALS Neurons' broken machinery piles up in ALS Esclerosis Lateral Amiotrófica Dormant viral genes may awaken to ... Dementia Information Page Multifocal Motor Neuropathy Information Page Multiple Sclerosis Information Page Muscular Dystrophy Information Page Myasthenia ...

  17. Underground- and surface technologies for joint flooding of gas caves; Unter- und Uebertagetechnik als Einheit zur Flutung von Gaskavernen

    Energy Technology Data Exchange (ETDEWEB)

    Raudonus, K.; Miersch, D. [UGS GmbH, Mittenwalde (Germany); Haensler, G. [Verbundnetz Gas AG, Leipzig (Germany)

    1998-12-31

    After 20 years of operation the oldes caves in the Bernburg storage VNG AG had to repair the facilities. This required flooding of the caves from the start. At the same time geomechanical reserves which were reevaluated on the basis of redimensioning could be used by deepening. Flooding and relocation of the displaced gas should not disturb gas storage and brine extraction. As one of the caves was filled with gas for the first time it was possible to use the brine. Flooding and gas filling were coupled. [Deutsch] Nach mehr als 20jaehriger Betriebszeit der aeltesten Kavernen auf dem Speicher Bernburg stand fuer die VNG AG die Aufgabe der Reparatur. Der Umfang der Arbeiten machte von Anfang an das vollstaendige Fluten der Kavernen erforderlich. Gleicheitig ergab sich dabei die Moeglichkeit, seinerzeit verbliebene geomechanische Reserven, die auf Basis einer auf aktuelle Erkenntnisse beruhenden Neudimensionierung bewertet wurden, durch Nachsolung auszuschoepfen. Die Heranfuehrung des Flutmediums und die Umlagerung des verdraengten Gases sollten ohne nachteilige Rueckwirkung auf den Gasspeicher- und Solegewinnungsbetrieb erfolgen. Da zu diesem Zeitpunkt eine Kaverne in der Phase der Gaserstbefuellung stand, konnte die ausgetragene Sole genutzt werden. Flutprozess und Gaserstbefuellung wurden somit im direkt gekoppelten Betrieb durchgefuehrt. (orig./MSK)

  18. Four-dimensional data assimilation as a method for coupling two meteorological model systems of different scales; Vierdimensionale Datenassimilation als Methode zur Kopplung zweier verschiedenskaliger meteorologischer Modellsysteme

    Energy Technology Data Exchange (ETDEWEB)

    Wilms-Grabe, W.

    2001-10-01

    A method of coupling two meteorological models of different scales must meet certain requirements: First, even a big difference in resolution between the two models must not produce disturbances in the smaller-scale model. This means that most nesting approaches are unfit for the purpose. The method presented here is not limited to meteorological models. It can be enhanced without much difficulty to dispersion models taking account of chemical atmospheric reactions, as e.g. in the CTM of the EURAD model or in DRAIS as an enhancement of the KAMM version. [German] Das Ziel dieser Arbeit bestand in der Entwicklung eines geeigneten Kopplungsverfahrens zweier verschiedenskaliger meteorologischer Modelle, das in einem Ein-Weg-Nesting dem kleinerskaligen Modell ermoeglicht, sowohl instationaere superskalige Verhaeltnisse als auch modellinterne kleinraeumige Prozesse miteinander zu verbinden. Im Rahmen des Projektes TFS mussten hierbei entscheidende Bedingungen an das Kopplungsverfahren gestellt werden. Allen voran darf vor allem ein auch grosser Unterschied in der Aufloesung der beiden verschiedenskaligen Modelle keine kuenstlichen Stoerungen im kleinerskaligen Modell produzieren. Somit scheiden die sonst ueblichen Nestingansaetze fuer diesen Fall aus. Das Verfahren ist derart konzipiert, dass es sich nicht auf rein meteorologische Modelle beschraenkt. Eine Ausweitung auf Ausbreitungsmodelle unter Beruecksichtigung chemischer Reaktionen in der Atmosphaere, wie sie etwa im CTM des EURAD-Modells oder im DRAIS als Erweiterung der KAMM-Version zur Verfuegung stehen, stellt keinen allzu grossen Schritt mehr dar. (orig.)

  19. Volver al desarrollo

    Directory of Open Access Journals (Sweden)

    Jaime Ornelas Delgado

    2012-01-01

    Full Text Available El desarrollo, categoría empleada para expresar el crecimiento económico, surge durante la "guerra fría" y si bien fue propuesta por teóricos metropolitanos, se asumió en Latinoamérica como parte de los instrumentos disponibles para lograr el crecimiento y alternativa al socialismo. El desarrollo mantuvo su vigencia entre 1945 y 1975, cuando al advenimiento del neoliberalismo fue paulatinamente retirado de la agenda de las preocupaciones nacionales e internacionales. Al iniciarse el siglo xxi, el fracaso del mercado autorregulado trajo de nueva cuenta al debate los problemas del desarrollo, lo que obliga a revisarlo críticamente, tanto como al concepto mismo para mostrar su carácter colonial, si se quiere construir caminos ajenos al neoliberal y superar los problemas que han hecho de Latinoamérica una de las regiones más desiguales del mundo.

  20. Alles is al uitgevonden

    NARCIS (Netherlands)

    J.G.M. van Marrewijk (Charles)

    1996-01-01

    textabstractDe voordelen van vrijhandel zijn zeer beperkt, al-thans als we de empirische schattingen van vooraanstaande economen en internationale organisaties mogen geloven. Zo worden de voordelen van liberalisatie voor de Europese Unie geraamd op ongeveer 0,5% van het bnp 1. De door het IMF gescha

  1. Gezondheid als marketinginstrument

    NARCIS (Netherlands)

    Vijver, van de L.P.L.; Berg, van den I.

    2008-01-01

    Is biologisch voedsel beter dan gangbaar? Hoe hard zijn de bewijzen daarvoor? En hoe sterk moet het bewijs zijn voordat je het als claim op een product mag zetten? In dit Biokennis bericht een overzicht van de wetenschappelijke conclusies en de mogelijkheden om biologisch te promoten als beter, neer

  2. Initial Symptoms of ALS

    Science.gov (United States)

    ... Research In Your Community Advocate Get Involved Donate Symptoms and Diagnosis En español Symptoms The initial symptoms of ALS can be quite ... the eyes and bladder are generally not affected. Diagnosis ALS is a difficult disease to diagnose. There ...

  3. Volver al desarrollo

    OpenAIRE

    Jaime Ornelas Delgado

    2012-01-01

    El desarrollo, categoría empleada para expresar el crecimiento económico, surge durante la "guerra fría" y si bien fue propuesta por teóricos metropolitanos, se asumió en Latinoamérica como parte de los instrumentos disponibles para lograr el crecimiento y alternativa al socialismo. El desarrollo mantuvo su vigencia entre 1945 y 1975, cuando al advenimiento del neoliberalismo fue paulatinamente retirado de la agenda de las preocupaciones nacionales e internacionales. Al iniciarse el siglo xxi...

  4. Systemintegration 'Upside Down'; Systemkommunikation 'Upside Down' - das Leitsystem als Kommunikationsclient innerhalb heterogener Systemlandschaften

    Energy Technology Data Exchange (ETDEWEB)

    Enste, U. [LeiKon GmbH, Herzogenrath (Germany)

    2003-10-01

    Vertical Integration of DCS-Systems with systems of the management level like ERP or MES as well as a horizontal Integration of different DCS-Systems becomes more and more important for industry. Depending on the current hierarchical system architecture, DCS-Systems are seen as information server and superior systems of the management level as information clients. Therefore superior systems are in general the active part for communication and the DCS-Systems are just servers, which have to deal with incoming requests. This architecture seems to be taken for granted - accepting a lot of deficien-cies and disadvantages. At this point a generic framework for client interfaces to com-municate in heterogeneous system environments was designed. Based on this frame-work a specific client interface for the I/A-Series has been developed to use external in-formation without additional gateways. (orig.) [German] Die vertikale Integration von Systemen der Betriebs- und Unternehmensleitebene mit den Systemen der Prozessleitebene, aber auch die horizontale, anlagenuebergreifende Integration von Prozessleitsystemen untereinander, gewinnen in der betrieblichen Praxis immer mehr an Bedeutung. Bedingt durch die vorherrschende hierarchische Ordnung der Systeme werden die Prozessleitsysteme bisher als passiver Informationserbringer und die Systeme der Betriebsleitebene als die aktiven Kommunikationspartner realisiert. Umsetzungstechnisch gesehen, sind bei den fuer die Prozessleittechnik relevanten standardisierten Client-Server Kommunikationssystemen wie OPC, rate at aGlance oder ACPLT/KS die Prozessleitsysteme mit einer Server-Schnittstelle ausgestattet und die ueberlagerten Systeme als Kommunikationsklienten umgesetzt. Diese Konstellation wird selten hinterfragt, begruendet auch dadurch, dass die Systemhersteller fuer eine umgekehrte Systemintegrationsrichtung bisher keine Loesungen anbieten. An dieser Stelle wurde ein generisches Rahmenwerk geschaffen, das eine

  5. Tussentijds Toetsen als Leerstrategie

    NARCIS (Netherlands)

    Dirkx, Kim; Kester, Liesbeth; Kirschner, Paul A.

    2013-01-01

    Dirkx, K. J. H., Kester, L., & Kirschner, P. A. (2013, April). Tussentijds toetsen als Leerstrategie [Testing as Learning Strategy]. Presentation at the Miniconference on Assessment from the Mastersprogram Educational Sciences, Heerlen, The Netherlands.

  6. Analyzing Al Qaedaism

    Institute of Scientific and Technical Information of China (English)

    Yuan Hua

    2008-01-01

    Three major events are responsible for the rampancy today of Al Qaedaism, the doctrine of Al Qaeda, an Islam extremist organization. They are: the Anti-Soviet Afghanistan War for the birth of the group; the September 11 terrorist attacks for the spread of its extremist demagogy and the war on terror for its branches networking into alliances worldwide.Al Qaedaism aims at driving away Western forces on the Moslem lands, overthrowing local Pro-West regimes, destroying Israel and setting up a Caliphate empire. Its rampancy has resulted from a combination of diverse factors at work under specific historical conditions rather an inevitable outcome of the growth of the Islam religion.As an ideological weapon for launching Jihad to oust Western influence and topple local regimes, Al Qaedaism reflects an extremist portrayal of modern Islam society, politics, economy and culture.

  7. Lou Gehrig's Disease (ALS)

    Science.gov (United States)

    ... to speak and write. Hawking, who has a wife and three children, once said, "The prospect of ... and arm movement. With patience, the families of patients with ALS can learn to communicate effectively with ...

  8. Sociale media als leermiddel

    NARCIS (Netherlands)

    Rubens, Wilfred

    2012-01-01

    Rubens, W. (2012, 5 juni). Sociale media als leermiddel. Presentatie over het gebruik van sociale media binnen het onderwijs, verzorgd tijdens een ouderraadbijeenkomst van de Katholieke Scholengemeenschap Etten-Leur, Etten-Leur, Nederland.

  9. Amyotrophic lateral sclerosis (ALS)

    Science.gov (United States)

    Lou Gehrig disease; ALS; Upper and lower motor neuron disease; Motor neuron disease ... 98. Shaw PJ. Amyotrophic lateral sclerosis and other motor neuron diseases. In: Goldman L, Schafer AI, eds. Goldman's Cecil ...

  10. Advanced Light Source (ALS)

    Data.gov (United States)

    Federal Laboratory Consortium — The Advanced Light Source (ALS), a world leader in soft x-ray science, generates light in the wavelengths needed for examining the atomic and electronic structure of...

  11. Trauer als Biografiegenerator

    OpenAIRE

    Winkel, Heidemarie

    2008-01-01

    Der Tod eines Alter Ego erweist sich für Trauernde als gravierende Kontingenzerfahrung. Sie vermag das individuelle Selbstverständnis in umfassender Weise zu erschüttern, wobei sich Trauer als Schmerz von unvergleichlicher Intensität und Tiefe konstituiert. Die emotionale Erfahrung wird hierbei – nach Maßgabe psychologischer und therapeutischer Vorstellungen – zum Ausgangspunkt und zum Maßstab individueller Selbstvergewisserung. Diese Auffassung von Trauer korrespondiert mit einer allgemeinen...

  12. Der Preis als Kaufbarriere?

    DEFF Research Database (Denmark)

    Mueller Loose, Simone

    2012-01-01

    Die Preispolitik hat eine herausragende Stellung im Marketing. Der Preis eines Produktes ist für Verbraucher ein direkter Kostenfaktor und für Unternehmen die Stellgröße im Mar-ketingmix, die den Umsatz am stärksten beeinflusst (vgl. Nieschlag et al. 2002). Wenn die Akzeptanz und der regelmäßige...... Verzehr gesunder Lebensmittel erhöht werden soll, ist es sowohl für die Verbraucherpolitik als auch für Lebensmittelproduzenten wichtig, den Ein-fluss des Preises auf die Kaufentscheidung zu verstehen. Aus Verbrauchersicht ist der Preis neben dem Geschmack die wichtigste Produkteigen-schaft beim Kauf von...... Lebensmitteln (vgl. Brunsø/Grunert 1998) und stellt eine Kaufbarrie-re für Lebensmittel mit gesundheitsfördernden Eigenschaften dar. Studien in den USA (vgl. Cassady et al. 2007), Frankreich (vgl. Drewnowski et al. 2004; Andrieu et al. 2005) und Deutschland (vgl. Karg et al. 2008) kommen übereinstimmend zu dem...

  13. Leakage current behaviors of Al/ZrO2/Al and Al/YSZ/Al devices

    Science.gov (United States)

    Yeh, Tsung-Her; Lin, Ruei-De; Cherng, Bo-Ruei; Cherng, Jyh-Shiarn

    2015-01-01

    The leakage current behaviors of Al/ZrO2/Al and Al/yttria stabilized zirconia (YSZ)/Al devices are investigated for resistive random access memory (RRAM) applications. A silicon oxide layer (450 nm) is first formed on a Si wafer by thermal oxidation. Onto it an Al bottom electrode (270 nm), a ZrO2 or YSZ nano-film (75 nm), and an Al top electrode (270 nm) are sequentially deposited by sputtering. These RRAM devices exhibit ohmic behaviors in the low-field region, while Schottky and Poole-Frenkel emissions take over in the high-field regions. Both the Schottky and trap barrier levels are decreased when monoclinic ZrO2 is replaced by cubic YSZ in the metal/oxide/metal structure. This is attributed not only to the higher symmetry crystal structure and lower binding energy of YSZ, but also to the formation of more oxygen vacancies and their re-distribution associated with yttria doping.

  14. Spondyloarthritis oder Morbus Bechterew: Neue Klassifikation der axialen Spondyloarthritis mit Morbus Bechterew als Endstadium

    Directory of Open Access Journals (Sweden)

    Schirmer M

    2011-01-01

    Full Text Available Mit einer Prävalenz von 0,6–1,9 % ist die axiale Spondyloarthritis (SpA der Sammelbegriff für eine Gruppe von entzündlichen rheumatischen Krankheiten, die vor allem das axiale Skelett und die Insertionsstellen der Sehnen am Knochen (Enthesen betreffen. Je nach Subtyp der SpA besteht eine unterschiedlich starke Assoziation mit dem MHC-I-Antigen HLA-B27. Entsprechend der „Assessment of Spondyloarthritis International Society“ (ASAS wird die SpA anhand der prädominant betroffenen Region in die periphere und die axiale Form unterteilt. Die aktuelle Klassifikation der axialen SpA erfolgt mittels der 2009 veröffentlichten ASAS-Kriterien. Bei Sakroiliitis in der Bildgebung müssen ≥ 1 SpAParameter, bei positivem HLA-B27-Befund ≥ 2 andere SpA-Parameter für die Klassifikation als SpA vorhanden sein. SpA-Parameter sind entzündlicher Rückenschmerz, Arthritis, Familienanamnese, Uveitis anterior, entzündliche Darmerkrankung, Psoriasis, Daktylitis, Enthesitis, gutes Ansprechen auf NSAR und HLA-B27-Positivität. Die Sensitivität dieser Kriterien liegt bei 82,9 %, die Spezifität bei 84,4 %. Für die axiale Beteiligung der Psoriasis arthropathica werden auch die ähnlichen CASPAR-Kriterien verwendet. Für die Klassifikation des Morbus Bechterew werden die 1984 modifizierten New York-Kriterien verwendet, bei denen neben spezifischen klinischen Kriterien radiologisch eine Sacroiliitis Grad 2 oder mehr bilateral oder Grad 3–4 unilateral vorhanden sein muss. Bei schwerem Verlauf kann prinzipiell jede Form der SpA mit einer axialen Beteiligung in einen Morbus Bechterew übergehen. Somit ist der Morbus Bechterew sowohl ein Subtyp der SpA, als auch eine mögliche Spätform anderer Subtypen. Zur Verlaufs- bzw. Therapiekontrolle werden sowohl bei axialer SpA als auch bei Morbus Bechterew spezifische Scores verwendet, um Krankheitsaktivität und Funktionsveränderungen zu dokumentieren (BASFI, BASDAI, ASDAS.

  15. Cuidando al adulto y al anciano

    Directory of Open Access Journals (Sweden)

    Alba Lucero López Díaz

    2003-01-01

    Full Text Available El propósito del artículo es describir, desde el ámbito universitario, la experiencia en la aplicación de la Teoría del Déficit de Autocuidado (TDAC con la población adulta y anciana. Se explican los procesos y resultados desde la preparación docente, la conformación de la asignatura, hasta el desarrollo de la experiencia práctica en el ámbito hospitalario y de la vida cotidiana. La experiencia muestra la adecuación de la TDAC para abordar el cuidado de esta población y la necesidad de desarrollar otros estudios al respecto.

  16. Fortschritt als Fortschrittsdiskurs

    Directory of Open Access Journals (Sweden)

    Rainer Schmid-Zartner

    2014-12-01

    Full Text Available Zur Erzielung gesellschaftlichen Fortschritts in demokratisch verfassten Gesellschaften soll die Möglichkeit am Fortschrittsdiskurs teilnehmen zu können für alle Mitglieder der Gesellschaft als selbstverständliche Prämisse gelten. Fortschritt wird also als Bewusstseinsbildung dem Fortschritt selbst gegenüber und als Entscheidungs- und Handlungsfähigkeit auf individueller und gesellschaftlicher Ebene definiert. Dies setzt entsprechende Maßnahmen zur Befähigung dazu voraus, die alle Mitglieder der Gesellschaft erfassen. Dabei ist der Bildungsbereich angesprochen, insbesondere der Schulunterricht. Neben dem in der aktuellen blidungspolitischen Debatte forcierten Fokus auf den Aspekt der Kompetenzorientierung, der hier nicht infrage gestellt wird, ist als notwendige Ergänzung ein reflexionsorientierter Schulunterricht in allen Bildungsfächern einzufordern und umzusetzen. Im Weiteren beschreibt der Text den Weg von der Brauchbarkeit zur Bedeutsamkeit von schulischem Wissen durch Relevanzreflexionsprovokationen im Schulunterricht, um Sinn und Bedeutung der vermittelten Bildungsinhalte zu verhandeln. Am Beispiel von Mathematik als Bildungsfach wird der Inhalt von reflexionsorientertem Unterricht verdeutlicht. Darüber hinaus beschreibt der Text eine Reihe von konkreten Fallbeispielen aus der aktuell versuchsweise durchgeführten Unterrichtspraxis in Mathematik.

  17. Modification of residual stress in Al-[AlBO]w/Al compound plate

    Institute of Scientific and Technical Information of China (English)

    姜传海; 吴建生; 王德尊

    2001-01-01

    The application of compound parts of Al-[AlBO]w/Al not only reduces the cost of the parts but also improves its properties. However, there is a large thermal residual stress between Al and [AlBO]w/Al, and it is harmful for practical application. From the theoretical analyses and experimental results, it was found that by the compressive pre-plastic deformation perpendicular to the interface between Al and [AlBO]w/Al, the interlayer residual stress of compound parts can be reduced, while the mechanical properties of compound parts can be improved.

  18. Pornographie als Metapher

    Directory of Open Access Journals (Sweden)

    Caroline Schubarth

    2010-03-01

    Full Text Available In diesem Artikel werden unterschiedliche metaphorische Verwendungen des Pornografiebegriffs und deren Implikationen untersucht. Während die Existenz von Pornografie der feministischen Anti-Porno-Bewegung als Erklärung für die anhaltende Diskriminierung von Frauen in westlichen Gesellschaften dient, nutzen rechtskonservative Kräfte den Pornografievorwurf als Rechtfertigung für die Zensur von als deviant empfundenen Identitäten und sexuellen Praktiken.This article examines different metaphorical uses of the term pornography and the resulting implications. While the existence of pornography for the feminist anti-porno movement serves as factor in the continuing discrimination of women in western societies, conservative powers on the right use the allegation of pornography as a justification for censorship of those identities and sexual practices deemed deviant.

  19. Altern als Widerstand

    Directory of Open Access Journals (Sweden)

    Roberta Maierhofer

    2005-07-01

    Full Text Available Gullettes kulturwissenschaftliche Untersuchung Aged by Culture ist wie bereits ihre zwei vorangehenden Werke, die sich mit Altern beschäftigen – Safe at Last in the Middle Years: The Invention of the Midlife Progress Novel (1988 und Declining to Decline. Cultural Combat and the Politics of the Middle (1997 –, von großem persönlichen Engagement und durch ein politisches Anliegen motiviert. Sowohl die Dringlichkeit als auch der Widerstand, den Gullette, die sich als „age critic“ definiert, als moralische und politische Notwendigkeit postuliert, werden in der Zweiteilung der Abhandlung angesprochen: „Cultural Urgencies“ und „Theorizing Age Resistantly“. Während Gullette den Begriff „aged by culture“ bereits in Declining to Decline einführt, stellt sie ihn nun in den Mittelpunkt ihrer Untersuchung. Das Buch ist einerseits einer gesellschaftspolitischen Analyse der USA gewidmet, andererseits wird eine Theorie des Widerstands gegenüber Altersdiskriminierung entwickelt.

  20. Carta al Editor

    Directory of Open Access Journals (Sweden)

    José Andrés Burgos Zuleta

    2010-06-01

    Full Text Available La medicina al basarse generalmente en la clínica, correlacionaexámenes complementarios y organiza un diagnóstico y tratamiento, es una disciplina donde es imprescindible saber recolectar, analizar, interpretar y concretar una respuesta adecuada, es así que la información que se recibe es esencial para el desempeño médico.La certeza es una realidad que se da en algunas situaciones y enotras las probabilidades establecen conclusiones. Lo normal muchas veces se define sobre la base de criterios estadísticos, basados en riesgos poblacionales que no necesariamente se aplican al caso boliviano.

  1. Ongelijkheid als beleidsvraagstuk

    NARCIS (Netherlands)

    Wilterdink, N.

    2014-01-01

    Op het hoogtepunt van de hype rond het ongelijkheidsonder­zoek van Piketty presenteerde de WRR zijn verkenningHoe ongelijk is Nederland? Voor de onafhankelijke denktank is stelling nemen in een politiek vraagstuk als dat van ongelijkheid best ingewikkeld.

  2. MEMORE AL AMIKO

    Institute of Scientific and Technical Information of China (English)

    Osmo; BULLER

    1999-01-01

    Skuis min la novajo, ke mia amiko kajkolego Dai Song’en forlais nin por iam. Lakruela fatalo foriris lin, kiam li ankoraǚ estismeze de sia laboro, plena de planoj kaj tiel ju-ha. Kun muta senpovo ni devas subii al lasenkompata trudo de la sorto, kvankam la men-so ribelas kaj rifuzas kredi ke ipovas esti vero.

  3. Abraham Kuyper als theoloog

    Directory of Open Access Journals (Sweden)

    W. H. Velema

    1989-06-01

    Full Text Available Men zou in Nederland de herdenking van Kuypers honderdvijftigste geboortedag hebben kunnen aangrijpen als een gelegenheid om diens theologie en diens levenswerk in kerk en samenleving te evalueren. Niemand kan ontkennen dat er in genoemde publicaties iets van een evaluatie is te vinden.

  4. Kulturmorphologie als Zivilisationskritik

    DEFF Research Database (Denmark)

    Peters, Rikke Alberg

    2010-01-01

    Der Untergang des Abendlandes wird oft als dasjenige Werk betrachtet, das am tiefsten die national gefärbte Gegenüberstellung von Kultur und Zivilisation in der Zwischenkriegszeit geprägt und propagiert hat. Wie auch bei anderen Autoren der Konservativen Revolution, vor allem bei Thomas Mann und...

  5. Comentarios al Salto Social

    Directory of Open Access Journals (Sweden)

    Facultad de Ciencias Económicas

    1995-06-01

    Full Text Available 1. El Plan considera que la política social es un componente central de la estrategia macroeconómica. A diferencia de la administración Gaviria, lo social ha dejado de ser un asunto marginal, es consustancial al desarrollo y, por tanto, se le confiere una dimensión cualitativamente diferente.

  6. Calculation of interaction of AlCl, AlCl2 and AlCl3 on Al4C3 (001) Al4CO4 (001) and Al2CO (001) planes

    Institute of Scientific and Technical Information of China (English)

    段少飞; 陈秀敏; 杨斌; 郁青春; 徐宝强; 刘大春

    2015-01-01

    To make sure the intermediate products of the carbothermic reduction of Al2O3 process, such as Al4CO4, Al2CO and Al4C3, and the interaction of AlCl, AlCl2, AlCl3 with Al4CO4, Al2CO and Al4C3, respectively, thermodynamic analyses were used to study the chloride reaction production of them under the vacuum situation. The stable structures and electronic properties of AlCl, AlCl2 and AlCl3 adsorbed on Al4CO4, Al2CO and Al4C3 were calculated by first-principles calculations by the CASTEP module in the Materials Studio program. The results show that the AlCl3 and AlCl2 molecules have decomposed on the plane of Al4C3 (001), while there are no obvious decomposition of AlCl3 and AlCl2 on Al4CO4 (001) and Al2CO (001) planes. The adsorption of AlCl on the Al4CO4 (001) and Al2CO (001) planes is stronger than that on the Al4C3(001) plane. The interaction strength of AlCl3, as well as AlCl2, with Al4CO4, Al2CO and Al4C3 is in the sequence of Al4CO4Al2CO>Al4C3.

  7. De GPS al mapa

    Directory of Open Access Journals (Sweden)

    Esteban Dörries

    2016-03-01

    Full Text Available Las coordenadas Lambert obtenidas a partir de mediciones con equipos GPS de mano, llamados a veces navegadores, en ciertos casos confunden al usuario, por diferir claramente de su posición real al ser graficadas en un mapa del Instituto Geográfico Nacional (IGN: Esto puede resolverse con suficiente exactitud mediante una transformación de Molodensky, seguida de la correspondiente proyección cartográfica. Sin embargo, los tres parámetros necesarios para la transformación, supuestamente válidos para Costa Rica, se encuentran en muchas variantes y producen obviamente resultados diferentes. En este trabajo se analizan los fundamentos del problema y sus posibles soluciones, culminando con un estudio comparativo de ocho casos, que permite seleccionar los valores más adecuados para los parámetros.

  8. Derecho al desarrollo y globalidad

    OpenAIRE

    Álvarez Vita, Juan

    2014-01-01

    La presente disertación, que he intitulado Derecho al Desarrollo y Globalidad, consta de cuatropuntos principales:I. El derecho al desarrollo en el contexto de los derechos humanosII. La noción del derecho al desarrolloIII. El derecho al desarrollo en el marco de las llamadas generaciones de derechos humanosIV. El derecho al desarrollo y la aldea globalPalabras clave: derechos humanos, Derecho Natural, Derecho Positivo, sociedad global.

  9. Augmented Reality als Bildungsenhancement?

    OpenAIRE

    Damberger, Thomas

    2015-01-01

    Die Realität, die sich mithilfe von Datenbrillen und Smartphone Applikationen in die virtuelle Welt hinein ausdehnt, erfährt eine Form des Enhancements. Ein solches Enhancement kann unter bestimmten Voraussetzungen als Bildungsenhancement verstanden werden. Der Text befasst sich mit Formen der erweiterten Realität, ferner mit dem, um was es wesentlich bei der Bildung geht und zuletzt mit den Bedingungen, die erforderlich sind, um diesem Wesentlichen mit Hilfe von augmented reality besser zum ...

  10. Carta al editor

    Directory of Open Access Journals (Sweden)

    Harry Pachajoa

    2012-02-01

    Full Text Available Recently, Valencia et al., published a very interesting article called «Lipid profile in a group of patients with Turner’s syndrome at Clínica Universitaria Bolivariana in the city of Medellín between 2000 and 2009". An article which evaluated lipid levels in patients withTurner syndrome in a Colombian clinic, the study associated results of lipid profile with karyotype and other risk factors for coronary heart disease.

  11. Religion als soziale Deutungspraxis

    Directory of Open Access Journals (Sweden)

    Ulrike Lingen-Ali

    2016-12-01

    Full Text Available ENGLISH: During the last decades, the topos religion transformed into a powerful category of difference, which is also relevant for educationsystems and settings. Religion as a tool to differentiate between subjects is linked with power and dominance and, thus,with ideas about the constructed identities of “the other”. With this respects, religion functions as a code to define in- andexclusions and mark “the other”, e.g. “the Muslim” in predominantly Christian societies in Europe. Critical theories on racismenable to recognize, describe and define these practices and their effects. They can provide a useful tool to question and challengeintercultural and interreligious educational approaches which potentially reproduce and, thus, strengthen cultural/religiousdifferentiations. DEUTSCH: Die Differenz- und Heterogenitätskategorie Religion hat sich in den letzten Jahren im europäischen und auch deutschsprachigenDiskursraum zu einer medial, wissenschaftlich und politisch wirkmächtigen Kategorie entwickelt. Dabei zeigt sich Religion sowohlals soziale Unterscheidungspraxis (auch in pädagogischen Arrangements, als auch als Mittel zur Identifikation und Charakterisierungbestimmter Gruppen und Individuen als religiöse Subjekte. Religion stellt in diesem Zusammenhang einen Zugehörigkeitscodedar, mit dem Personen als natio-ethno-kulturell Andere markiert werden, wie die Markierung von MuslimInnen durchAngehörige der mehrheitlich christlichen Dominanzgesellschaft zeigt. Rassismuskritische Ansätze ermöglichen es zumeist eherimplizit an Rassekonstruktionen anschließende Unterscheidungen zu erkennen und zu beschreiben, den Bedingungen ihres Wirksamwerdensnachzugehen sowie ihre Konsequenzen zu bestimmen. Eine rassismuskritische und migrationspädagogisch informierteReligionspädagogik ermöglicht AkteurInnen, weniger auf gewaltvolle Unterscheidungspraxen angewiesen zu sein undalternative Veränderungs- und Handlungsmöglichkeiten zu

  12. Teatro al aire libre

    Directory of Open Access Journals (Sweden)

    Philippe Canac

    2016-11-01

    Full Text Available Siendo cada vez más frecuentes y numerosas las peregrinaciones a la basílica de Notre Dame, de Laus (Altos Alpes, su capacidad resultaba hace tiempo insuficiente para acoger a sus peregrinos. Este fue el motivo de crear, en un terreno situado ante el atrio de la basílica, un conjunto, que permitiese celebrar misas al aire libre, ceremonias litúrgicas o representaciones de teatro religioso y que dispusiese de todas las posibilidades para conseguir la libertad del juego escénico.

  13. Rheocasting Al matrix composites

    Energy Technology Data Exchange (ETDEWEB)

    Girot, F.A.; Albingre, L.; Quenisset, J.M.; Naslain, R.

    1987-11-01

    A development status account is given for the rheocasting method of Al-alloy matrix/SiC-whisker composites, which involves the incorporation and homogeneous distribution of 8-15 vol pct of whiskers through the stirring of the semisolid matrix melt while retaining sufficient fluidity for casting. Both 1-, 3-, and 6-mm fibers of Nicalon SiC and and SiC whisker reinforcements have been experimentally investigated, with attention to the characterization of the resulting microstructures and the effects of fiber-matrix interactions. A thin silica layer is found at the whisker surface. 7 references.

  14. Frequently Asked Questions about ALS and the ALS Registry

    Science.gov (United States)

    ... Muscular Dystrophy Association (www.mda.org) The Les Turner ALS Foundation (www.lesturnerals.org) Back to Top ... als. Back to Top Why was incidence (new cases of ALS) not provided in the report? Date of diagnosis is needed to calculate incidence. ...

  15. Derivados vinculados al seguro.

    Directory of Open Access Journals (Sweden)

    De Paz Cobo, Sonia

    2003-01-01

    Full Text Available El presente trabajo tiene como objetivo la presentación de los derivados financieros como instrumentos de cobertura de los riesgos del seguro, así como de los principales proyectos que se desarrollan a través de los mismos, como por ejemplo los derivados sobre el clima. Hay que tener presente las pérdidas multimillonarias ocasionadas en casos como el de la banca Baring’s, o el de Orange County, por citar algunas, que si bien ciertos autores afirman que están en relación directa con el uso de estos productos, no podemos olvidar que los instrumentos derivados se desarrollaron con el objetivo principal de proteger al usuario de la posible volatilidad del activo subyacente. Ya en la industria aseguradora los derivados vinculados a tal actividad son instrumentos donde el pago se condiciona a la ocurrencia de su suceso de siniestro, o serie de sucesos múltiples que disparen las pérdidas. Tras el repaso efectuado y la descripción que este tipo de instrumentos puede tener en la gestión del riesgo por parte de la industria aseguradora, concluiremos con la exposición de las relaciones con el reaseguro tradicional así como una breve referencia al futuro de este tipo de instrumentos

  16. Gliricidia sepium al establecimiento

    Directory of Open Access Journals (Sweden)

    J. L. Valle

    2004-01-01

    Full Text Available Se asoció Cenchrus ciliaris (Cc y Gliricidia sepium (Gs para evaluar la producción de biomasa y la composición química de los forrajes en la fase de establecimiento, en el estado de Morelos, México, en condiciones de trópico seco. Se empleó un análisis de varianza con diseño en bloques al azar, en donde T1 fue pasto solo, T2 Cc más Gs con 5,000 plantas ha-1 y el T3 Cs más Gs con 14,285 plantas ha-1. Se midió la producción de forraje individual y asociado con materia seca (t MS/Ha, la altura (A en cm, la proteína cruda (PC%, las fracciones de fibra (FDN% y FDA% y la digestibilidad in vitro de la materia seca (DIVMS%. El T3 tuvo una mejor producción de biomasa (P0.05. La asociación de 14,285 plantas ha-1 de G. sepium con pasto Cenchrus ciliaris mejoró la producción de biomasa y la disponibilidad total de nutrientes por superficie cultivada al establecimiento

  17. AL-SIYAQ FI TARJAMAH KITAB AL-LUGHAH AL-'ARABIYAH ILA AL-LUGHAH AL-INDUNISIYAH

    Directory of Open Access Journals (Sweden)

    Devita Zuliati

    2016-06-01

    Full Text Available This study aimed at analyzing the translation of 53 poems in Tata Bahasa Arab book written by Chatibul Umam, et al. in view of the context theory. This study was based on a contextual translation theory that the understanding the right and proper context of Arabic texts translated into Indonesian plays an important role in determining the quality of a translation that is easily understood, contextual and functional. The qualitative data were read using the linguistic approach and critical translation. This study concluded that the translation work of Chatibul Umam, et al. tended to be literal not based on the complete understanding of the context, internal context (linguistic context and socio-cultural context of the texts. The role of the external context of the texts is less utilized in the translation process of poetry (nazham, so that the translation of the book is neither communicative nor functional.

  18. Modeling neuronal vulnerability in ALS.

    Science.gov (United States)

    Roselli, Francesco; Caroni, Pico

    2014-08-20

    Using computational models of motor neuron ion fluxes, firing properties, and energy requirements, Le Masson et al. (2014) reveal how local imbalances in energy homeostasis may self-amplify and contribute to neurodegeneration in ALS.

  19. AL-USRCRN Station Information

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Documentation of United States Alabama Regional Climate Reference Network (AL-USRCRN) installations in 2006. Installations documented are for AL-USRCRN pilot project...

  20. COMENTARIO AL CASO PINOCHET

    Directory of Open Access Journals (Sweden)

    Alberto Contreras Clunes

    2002-01-01

    Full Text Available El fallo en el caso Pinochet tiene distintas formas de ser analizado. De partida, desde un punto de vista político, también constitucional, del derecho penal. Sin embargo, nos abocaremos al estudio desde el punto de vista procesal, en especial a lo referido al Debido Proceso. Para ello se analizará los presupuestos, la solución dada por la Excma. Corte Suprema y las consecuencias del mismo. Además, se criticará la solución dada, desde la óptica de las garantías procesales del imputado, contenidas en el nuevo proceso penal y lo dispuesto en la Constitución y la Convención Americana de Derechos Humanos. Finalmente, se argumentará en favor de una interpretación finalista y armónica de la Constitución y los tratados internacionales de derechos humanos.The verdict of the Pinochet Case has different ways of being analyzed: from the political, the constitutional, and the penal law points of view. However, we will approach this study from the legal point of view, especially to that referred to as the Proper Process. To do this, the budgets, the solution given by the Most Excellent Supreme Court, and its consequences will be analyzed. Furthermore, the given solution will be criticized from the point of view of the legal guarantees of the accused contained in the new penal process and what is contained in the Constitution and in the American Convention of Human Rights. In conclusion, we will argue in favor of a final and harmonious interpretation of the Constitution and the international agreement of human rights.

  1. Carta al Editor

    Directory of Open Access Journals (Sweden)

    Darío Maldonado Romero

    1991-03-01

    Full Text Available

    Bogotá, 01 de Agosto de 1990
    Señores
    Miembros del Consejo Editorial
    Academia Nacional de Medicina
    E.S.D.

    Señores doctores:

    Con toda consideración y respeto me permito agregar algunas anotaciones al escrito del Académico Alberto Cárdenas Escobar, aparecido en el No. 22 de Medicina, para destacar algunos aspectos de la personalidad del doctor Alberto Schweitzer galardonado con el Premio Nobel de la Paz.

    A los 30 años de edad tomó una decisión dramática: Estudiar Medicina para trabajaren el África Ecuatorial. Cuando terminó sus investigaciones sobre enfermedades tropicales y sus prácticas hospitaLarias, partió para el Gabon al pequeño pueblo de Lambarené. La tarea era desconsoladora; La atención médica había que prestarla al aire libre; iba con su esposa, como enfermera y amanuense, y no se encontraba ni un intérprete, ni un ayudante. Cuando le llegaron la medicina y el equipaje hubo que acomodarlos en un viejo gallinero abandonado; el calor era insoportable y le venían enfermos de varias millas a la redonda, a pie o en Canoas.

    Las enfermedades más difundidas eran Malaria, Disentería, estreptococias y la más mortífera, la Tripanosomiasis Gambiense, para la que empezaban a llegar medicinas nuevas eficaces y las medidas preventivas como el suministro de agua potable y enmallado de ventanas impedían muchas contaminaciones.

    Pero la que causaba mayores dificultades y trabajo era la Mycobacteriasis Anestesiante, incurable, de difícil diagnóstico, afectando a varios miembros de la misma familia, de aspecto horripilante, con complicaciones neuríticas muy dolorosas, frecuente ceguera, e invalideces y procesos erisepelatososacrotéricos, que exigían acompañante para el cambio y lavado de vendas y suministro de alimentos.

    A menos de un año de

  2. Konsep Hati Menurut al-Hakim al-Tirmidzi

    Directory of Open Access Journals (Sweden)

    Ryandi Ryandi

    2014-03-01

    Full Text Available Dalam khazanah sufi, hati atau qalb adalah salah satu term sentral yang dibahas secara mendalam. Karena bagi sufi, hati adalah entitas metafisik (latifah rabbaniyyah ruhaniyyah yang dengannya manusia dapat mencapai ma’arifatullah dan mengetahui rahasia-rahasia-Nya. Salah satu sufi klasik yang mengkaji hati secara mendalam adalah Abu ‘Abdullah ibn ‘Ali ibn al-Hasan ibn Basyar al-Hakim al-Tirmidzi (w 320 H. Ia mengkonsepsikan hati sebagai entitas metafisik universal yang terkandung di dalamnya tingkatan-tingkatan batin (maqamat al-qalb, yaitu: sadr, qalb, fu’ad, dan lubb. Pemetaan ini dimunculkan sesuai dengan fungsi linguistiknya dan penggunaannya dalam al-Qur’an dan Hadis Nabi SAW. Tiap-tiap tingkatan batin tersebut berkaitan dengan tingkatan pengetahuan, keilmuan, spiritual, dan jiwa manusia. Kaitan tersebut menunjukan bahwa qalb merupakan eksistensi ruhani manusia (al-kainunah al-ruhiyyah, yang berfungsi sebagai instrumen penyempurna bagi manusia (al-jihaz al-mutakamil li al-insan yang meliputi seluruh kekuatan dan potensi manusia: ruhani, ‘aqliyah, dan kehendak, di mana manusia dengannya dapat merasa, berpikir, mengetahui, bahkan dapat mencapai ma’rifatullah dan dekat dengan-Nya.

  3. „Vertrieben 1938“ – Sonder-Blogserie im Van Swieten Blog der Medizinischen Universität Wien: Work in Progress über die mehr als 143 an der Medizinischen Fakultät der Universität Wien entlassenen Professoren und Dozenten / "Displaced 1938" – a special run in the Van Swieten Blog at the Medical University Vienna: Work in progress about 143+ professors and university teachers displaced from the Medical Faculty at the University Vienna

    Directory of Open Access Journals (Sweden)

    Bauer, Bruno

    2008-06-01

    Full Text Available Since 11th March 2008 the university library at the Medical University Vienna runs the special blog series "Displaced 1938" as part of its regular Van Swieten Blog (http://ub.meduniwien.ac.at/blog/. Each day one out of 143 displaced professors and university teachers is introduced in a seperate weblog posting. Biographies from a dissertation in the library's repositoy were scanned for this particular purpose. Moreover the corresponding publications from and about the displaced persons in stock of the branch library of the history of medicine were electronically catalogued in the library's OPAC. The postings also refer to pictures and documents in the picture archives and manuscript collection at the Medical University Vienna. Links to appropriate free internet web sites are offered in the postings to further inform on the displaced professors and university teachers.

  4. Editorial: Cartas al Editor

    Directory of Open Access Journals (Sweden)

    Guillermo Llanos

    2006-06-01

    Full Text Available En todas las revistas biomédicas del mundo existe una sección habitual denominada como el título de este editorial y que en Colombia Médica la llamamos correspondencia. Este espacio tiene como objetivo fundamental que los lectores escriban a los autores (investigadores comentando los artículos que se han publicado en números anteriores de la revista. Las cartas son, entonces, breves comentarios de desacuerdo o acuerdo (conceptual, metodológico, interpretativo sobre falencias ubicadas por un lector alerta al tema debatido en cualquiera de las secciones como en los artículos originales, editoriales, revisiones, presentación de casos, etc. publicados previamente en la revista. Las cartas deben permitir el intercambio de opiniones y formas de pensar y analizar los problemas planteados entre los autores y los lectores. En ocasiones una serie de cartas motivadas por un artículo original puede ser tan o más interesante como el artículo que generó la correspondencia. Las cartas son también un formato adecuado para comunicar un hecho novedoso de una observación clínica juiciosa no descrita antes. Un ejemplo de ello es la carta de un gineco-obstetra australiano cuando informó a Lancet los primeros efectos adversos informados de la talidomida. Colombia Médica, a pesar de mantener vigente esta sección, no ha sido muy afortunada en establecer una buena cultura del envío de cartas al editor. Pero últimamente han llegado juiciosas observaciones a las cuales se les ha dado prioridad en su publicación. Toda carta que comenta los hallazgos de un artículo es enviada a los autores para su respuesta, porque ello genera el debate académico buscado, y luego se publican, tanto la carta como su respuesta. El Estilo Vancouver recomienda que la carta y su respuesta deban ser breve, no pasar de dos o tres párrafos y contener sólo cuatro o cinco referencias. En lo posible (a menos que sea indispensable no presentar ni cuadros ni gráficos. El t

  5. Schizophrenia as a disconnection syndrome. Studies with functional magnetic resonance imaging and structural equation modeling; Schizophrenie als Diskonnektionssyndrom. Studien mit funktioneller Magnetresonanztomographie und Strukturgleichungsmodellen

    Energy Technology Data Exchange (ETDEWEB)

    Schloesser, R. [Universitaet Jena, Psychiatrische Klinik (Germany); Universitaet Jena, Psychiatrische Klinik, Jena (Germany); Wagner, G.; Koehler, S.; Sauer, H. [Universitaet Jena, Psychiatrische Klinik (Germany)

    2005-02-01

    zeichneten sich zudem durch eine reduzierte interhemisphaerische kortikokortikale Konnektivitaet aus. Dieser Unterschied zu den Gesunden war bei den Patienten unter atypischen Antipsychotika nicht mehr in dieser Auspraegung zu beobachten, was als Ausdruck einer moeglichen positiven Beeinflussung der Informationsverarbeitung bei Patienten unter Atypika interpretiert werden koennte. Die erhaltenen Ergebnisse sind konsistent mit dem Modell der Schizophrenie als einem Diskonnektionssyndrom und frueheren Konzeptionen einer ''kognitiven Dysmetrie'' als Grundlage kognitiver Defizite bei dieser Erkrankung. (orig.)

  6. Malamih al-Ashwat al-'Arabiyyah wa Makharijaha

    Directory of Open Access Journals (Sweden)

    Amrah Muhammad Kasim

    2015-12-01

    Full Text Available This writing discusses on al-ashwat al-‘arabiyyah that is known with “phonetic” term. It talks and interprets makharij al-huruf or place for producing sounds and also processing production of sounds by parts of mouth in Arabic language. The problems of sounds and its systems in Arabic language have been conducted by the scholars of al-ashwat al-‘arabiyyah attractively, neatly, and detail and gotten ahead the phonetic western scholars. Part of their analysis results formulate the study about al-ashwat al-sakinah (al-Shamit is known with vocal and consonant sounds in research questions shawait – shawamit. Ibnu Jinni has formulated “harakat”(wowel in Arabic language and dimension of letter  mad and liyn on alif  letter - waw - ya’ (ا و ي, from these letters create  harakat fathah, dammah, and kasrah. Moreover, in this writing also exist the description of hija’i letters and its makhraj that are correct from parts of mouth and the unity of coordinative sounds that produce sounds in morphemes arrangement, in one word that produces meaning. The result of phonological study has divided al-ashwat to be kinds of sound like the pronounced sounds, produced sounds from mouth, and heard sound.

  7. "Mediman" – Smartphone als Plattform zum Lernen? ["Mediman" – The smartphone as a learning platform?

    Directory of Open Access Journals (Sweden)

    Boeder, Niklas

    2013-02-01

    Full Text Available [english] Mobile devices with a connection to the internet – smartphones – are seen all over the place since the popular introduction of the Apple iPhone. Similar products existed but no company managed to combine simplicity and functionality so seamlesly. Their market share increases constantly and web sites get optimised for the small display sizes (often referred to as „responsive webdesign“ otherwise the usability lacks. Students seem to like smartphones aswell and a good question is if and to what extend those devices can play a role in e-learning.„Mediman“, an adaptation of the common game Hangman has been developed for smartphones. Test users asked to complete an online questionnaire. So far, only few e-learning applications for smartphones seem to exist. This is reflected in the low usage frequency. Especially the fact that most of the test users wear a smartphone with them all the time makes it an ideal learning plattform. Short learning sessions were rated more important than continuous text. The majority of the 11 test users rated Mediman as well developed. The foremost question whether a smartphone e-learning application is feasible must be answered positive – acceptance in the test user group was shown. E-learning applications on smartphones will be an important topic in the future as market shares increase constantly. Further studies are required due to the small number of partitipants in our survey. [german] Mobile Endgeräte mit Internetzugang (Smartphones sind seit Apples revolutionärer iPhone-Markteinführung nicht mehr aus dem Alltag wegzudenken und erfreuen sich ausgesprochener Beliebtheit. Ihr Marktanteil wächst stetig und Webseitenbetreiber kommen nicht umher, ihre Webseiten an die neuen kleinen Displaygrößen und Bedienungstechniken anzupassen – häufig als „Responsive Webdesign“ beschrieben. Anwendungen, die nicht für die Anzeige auf kleinen Bildschirmen optimiert sind, schränken den Bedienkomfort

  8. Porosity of porous Al alloys

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    Two porosity models of porous Al alloys with different pore types (ball and polygon shape) were established. The experimental results coincide well with theoretical computations. The porosity of Al alloys (Prc) consists of three parts, porosity caused by preform particles (Prp), additional porosity (Pra), and porosity caused by solidification shrinkage (Prs). Prp is the main part of Prc while Pra is the key for fabricating porous Al alloys successfully in spite of its little contribution to Prc.

  9. Al versus Si competition in FeSiAl alloys

    Energy Technology Data Exchange (ETDEWEB)

    Legarra, E. [Dpto. Electricidad y Electronica, Facultad de Ciencia y Tecnologia, Universidad del Pais Vasco (UPV/EHU), CP 644, 48080 Bilbao (Spain)], E-mail: estibaliz.legarra@ehu.es; Apinaniz, E. [Dpto. Fisica Aplicada I, Escuela de Ingenieria Tecnica Superior, Universidad del Pais Vasco, Alameda de Urquijo s/n 48013 Bilbao (Spain); Plazaola, F. [Dpto. Electricidad y Electronica, Facultad de Ciencia y Tecnologia, Universidad del Pais Vasco (UPV/EHU), CP 644, 48080 Bilbao (Spain); Jimenez, J.A. [Centro Nacional de Investigaciones Metalurgicas (CENIM), Avda. Gregorio del amo 8, 28040 Madrid (Spain); Pierna, A.R. [Chemical Engineering and Environmental Department, UPV/EHU, Box 1379, 20008 San Sebastian (Spain)

    2008-10-15

    In FeSiAl alloys, when Si substitutes for Al, important changes take place in the magnetism as well as in the structural properties. Alloys in the two composition series Fe{sub 75}Al{sub 25-x}Si{sub x} (x=0, 7.5, 12.5, 17.5, 25) and Fe{sub 70}Al{sub 30-x}Si{sub x} (x=0, 9, 15, 21, 30) were prepared by induction melting; afterwards they were crushed and then annealed in order to recover the DO{sub 3} stable phase. The deformed FeAl samples show larger lattice parameters than the ordered ones; however, this difference ({delta}a) decreases when Si substitutes for Al until it becomes zero (i.e. until the ordered samples and the deformed ones have the same lattice parameters). This trend is the same for both sample series and does not depend on the Fe content of the alloy. However, the magnetization has a different behaviour depending on the Fe content. For deformed Fe{sub 75}Al{sub 25-x}Si{sub x} alloys the saturation magnetization decreases with increasing Si content while for Fe{sub 70}Al{sub 30-x}Si{sub x} deformed alloys the saturation magnetization has a plateau in which the saturation magnetization values do not vary.

  10. Können die Parameter Dauerkatheter-Liegezeit, postoperatives Miktionsvolumen und Prostatagewicht als Parameter zur Vorhersage der Kontinenzwahrscheinlichkeit nach endoskopischer, extraperitonealer radikaler Prostatektomie dienen?

    Directory of Open Access Journals (Sweden)

    Sehovic M

    2010-01-01

    Full Text Available Die Kontinenzergebnisse nach den verschiedenen Verfahren der radikalen Prostatektomie zeigen bei entsprechender Erfahrung der Operateure keine Unterschiede und erreichen je nach Definition Raten bis zu 90 %. Es sollen deshalb unabhängige Parameter auf ihre Wertigkeit zur Abschätzung der Kontinenzwahrscheinlichkeit nach EERPE untersucht werden, um die Kontinenzraten verfahrensunabhängig optimieren zu können. Zur Erfassung der Kontinenzraten wird den Patienten jeweils 3, 6 und 12 Monate nach EERPE ein in der eigenen Abteilung entwickelter Fragebogen zugesandt. Das postoperative Miktionsvolumen wird mittels Uroflowmetrie ermittelt. Der Einfluss der zu untersuchenden Parameter wurde in Abhängigkeit der Ergebnisse der Fragebögen nach den entsprechenden Zeitintervallen analysiert. So zeigte sich, dass Patienten, welche 12 Monate nach radikaler Prostatektomie max. 1 Vorlage pro Tag benötigten, eine mittlere Dauerkatheter-Liegezeit von 10,2 Tagen hatten. Männer, die nach demselben Zeitraum 3 Vorlagen über 24 h benötigten, wurden im Mittel 19,5 Tage dauerhaft abgeleitet. Das mittlere Miktionsvolumen in der postoperativen Uroflowmetrie zeigte zu keinem Zeitpunkt einen signifikanten Unterschied zwischen den verschiedenen Gruppen. Ein höheres Prostatagewicht zeigte einen negativen Einfluss auf die Kontinenzergebnisse 3 Monate nach der Operation. Sechs und 12 Monate nach der EERPE ließen sich keine Auswirkungen des Organgewichtes auf das Kontinenzergebnis mehr darstellen. Als Konsequenz ergibt sich deshalb die Forderung nach einer Vermeidung verlängerter Katheter-Liegezeiten. Dies kann bereits intraoperativ durch eine sorgfältige Naht der vesiko-urethralen Anastomose erreicht werden. Voraussetzung dafür ist die sichere Beherrschung des angewandten Operationsverfahrens.

  11. Thermal Modeling of Al-Al and Al-Steel Friction Stir Spot Welding

    Science.gov (United States)

    Jedrasiak, P.; Shercliff, H. R.; Reilly, A.; McShane, G. J.; Chen, Y. C.; Wang, L.; Robson, J.; Prangnell, P.

    2016-09-01

    This paper presents a finite element thermal model for similar and dissimilar alloy friction stir spot welding (FSSW). The model is calibrated and validated using instrumented lap joints in Al-Al and Al-Fe automotive sheet alloys. The model successfully predicts the thermal histories for a range of process conditions. The resulting temperature histories are used to predict the growth of intermetallic phases at the interface in Al-Fe welds. Temperature predictions were used to study the evolution of hardness of a precipitation-hardened aluminum alloy during post-weld aging after FSSW.

  12. Philosophieren als Unterrichtsprinzip im Mathematikunterricht

    Science.gov (United States)

    Meerwaldt, Diana

    Philosophieren und Mathematik scheinen zunächst gegensätzliche Bereiche zu sein, die sich kaum vereinbaren lassen. Dies trifft für eine Auffassung zu, die Philosophieren als "Gerede" disqualifiziert und Mathematik als eine reine "Formelwissenschaft" begreift. Beide Auffassungen werden den Gegenständen nicht gerecht.

  13. Die Königlich Zoologische Gesellschaft „Natura Artis Magistra” und die Tierpsychologie

    NARCIS (Netherlands)

    Bierens de Haan, J.A.

    1939-01-01

    Die Königlich Zoologische Gesellschaft „Natura Artis Magistra”, deren Hundertjahrfeier wir diesen Sommer feiern, hat sich von Anfang an die Aufgabe gestellt, mehr als die Eigentümerin eines Gartens zu sein, in welchem mehr oder weniger seltene und kuriose Tiere für das Publikum zur Schau gestellt si

  14. El miedo al rey

    Directory of Open Access Journals (Sweden)

    François FORONDA

    2007-01-01

    Full Text Available La peur du roi. Sources et premières réflexions à propos d’une émotion aristocratique dans la Castille du XIVe siècleFace à un roi qui à présent pousse les effets de son ire jusqu’au meurtre pour faire le vide autour de lui et imposer sa différence souveraine, ses parents et les riches hommes, soit les principaux visés par cette politique de l’arbitraire qui enfreint les règles du jeu autant qu’elle contribue à les redéfinir, disent la peur (metus qu’ils ressentent, qu’ils utilisent aussi afin de donner à leur stratégie de pouvoir un fondement légitime. Et l’expression de cette émotion politique, qui tend à se muer en un stéréotype d’un discours aristocratique d’opposition, surtout présente dans les chroniques, mises ici en relation ici avec d’autres sources, notamment des correspondances, marque profondément l’histoire des relations souvent conflictuelles au sein de cette compagnie en définitive très étroite pendant un siècle, de la fin du XIIIe siècle à la fin du XIVe siècle. Cet article se propose d’ébaucher une première réflexion sur le sujet et d’en présenter les principales sources.El miedo al rey. Fuentes y primeras reflexiones acerca de una emoción aristocrática en la Castilla del siglo XIVFrente a un rey que ahora lleva hasta la muerte los efectos de su ira para hacer el vacío entorno a su persona e imponer su soberana, sus parientes y ricos hombres, o sea los principales afectados por esta política de la arbitrariedad que rompe las reglas del juego a la vez que contribuye a redefinirlas, dicen el miedo (metus que sienten, que utilizan también para darle a su estrategia de poder un fundamento legítimo. Y la expresión de esta emoción política, que tiende a convertirse en un estereotipo de un discurso aristocrático de oposición, sobre todo presente en la crónicas, aquí puestas en relación con otras fuentes, en particular cartas, marca profundamente la historia de

  15. Quantum dots formed in InSb/AlAs and AlSb/AlAs heterostructures

    Science.gov (United States)

    Abramkin, D. S.; Rumynin, K. M.; Bakarov, A. K.; Kolotovkina, D. A.; Gutakovskii, A. K.; Shamirzaev, T. S.

    2016-06-01

    The crystal structure of new self-assembled InSb/AlAs and AlSb/AlAs quantum dots grown by molecularbeam epitaxy has been investigated by transmission electron microscopy. The theoretical calculations of the energy spectrum of the quantum dots have been supplemented by the experimental data on the steady-state and time-resolved photoluminescence spectroscopy. Deposition of 1.5 ML of InSb or AlSb on the AlAs surface carried out in the regime of atomic-layer epitaxy leads to the formation of pseudomorphically strained quantum dots composed of InAlSbAs and AlSbAs alloys, respectively. The quantum dots can have the type-I and type-II energy spectra depending on the composition of the alloy. The ground hole state in the quantum dot belongs to the heavy-hole band and the localization energy of holes is much higher than that of electrons. The ground electron state in the type-I quantum dots belongs to the indirect X XY valley of the conduction band of the alloy. The ground electron state in the type-II quantum dots belongs to the indirect X valley of the conduction band of the AlAs matrix.

  16. Mehr Nähe durch mehr Partikeln? Zur verwendung der Abtönungspartikeln in persönlichen Briefen / Janika Kärk

    Index Scriptorium Estoniae

    Kärk, Janika

    2008-01-01

    Partiklite esinemissagedusest isiklikes kirjades ja selle muutumisest 18., 19. ja 20. sajandi vältel ning võimalikest partiklikasutust mõjutanud teguritest. Ülevaade ka värvingupartiklite morfoloogilistest, süntaktilistest ja pragmaatilistest omadustest

  17. EKSKURSO AL CANGYAN-MONTO

    Institute of Scientific and Technical Information of China (English)

    Verkita; de; Li; Shijun

    1999-01-01

    La Pekina Esperanto-Asocio preskaǚ sta-rigis tradicion organizi ekskurson printempe kajaǚtune. En la pasinta jaro, ni ekskursis al In-terna Mongolio kaj habis agrablajn renkontiojnkun geesperantistoj en Huhehot kaj Baotou. i-

  18. Al clamor de les vuvuzeles

    Directory of Open Access Journals (Sweden)

    Javier Olivera Betrán

    2010-09-01

    Full Text Available El Mundial de Futbol de Sud-àfrica ha situat l’Àfrica al mapa mundial i ha mostrat al món el triomf de l’estil de futbol d’Espanya basat en la col·lectivitat, l’esperit d’equip, la humilitat, la cohesió interna i el joc bonic. L’organització africana, seriosa i eficaç, ha sabut mobilitzar i il·lusionar la població del país que ha participat en el mundial des de l’orgull de ser africà, amb l’esperit alegre, festiu i també reivindicatiu de la gent de l’Àfrica. Aquest esdeveniment suposa el llançament de la marca “Sud-àfrica” al món amb un avís clar d’optar a l’organització d’uns primers Jocs Olímpics a Àfrica (potser els de 2020. S’obre una finestra d’esperança al segle xxi per al continent perdut de la mà de l’esport espectacle tan universal, massiu, emocional i mercantil que també es juga a la canxa de la política i de l’economia.

  19. 27Al, 47,49Ti, 31P, and 13C MAS NMR Study of VX, GD, and HD Reactions with Nanosize Al2O3, Conventional Al2O3 and TiO2, and Aluminum and Titanium Metal

    Science.gov (United States)

    2007-01-01

    pH ,3 compared to that of 1 which is insoluble at neutral pH . Thus, the sharpness of the peak for 2 is attributed to increased motion as a result of...O’Connor, R. J.; Munavalli, S.; Carnes , C. L.; Kapoor, P. N.; Klabunde, K. J. J. Am. Chem. Soc. 2001, 123, 1636-1644. (4) (a) Mehring, M.; Guerrero, G

  20. Al Zubarah - eine vergessene Legende

    DEFF Research Database (Denmark)

    Kinzel, Moritz

    2014-01-01

    Die im 18. Jahnhundert an der Nordwestküste Katars entstandene Handelsstadt Al Zubarah bildet den Forschungsschwerpunkt des Qatar Islamic Archaeology and Heritage Projects (QIAH), das die Universität Kopenhagen in Zusammenarbeit mit der Katarischen Museumsbehörde (QMA) seit 2009 durchführt. Neben...... der archäologischen Erforschung der Stadtanlage und ihrer Elemente, stehen die Erhaltung und Präsentation des Fundortes und seiner Bauten von Anfang an ebenfalls im Fokus der Arbeiten. Auf Grundlage der Projektarbeit wurde 2011 der Antrag auf Aufnahme von Al Zubarah in die Weltkulturerbe eingereicht....... Die Stadtanlage ist ein einzigartiges Beispiel für eine planmäßig angelegte Stadt mit allen typischen Elementen einer orientalischen Stadt: Souq, Moschee, Hofhausquartiere und turmbewehrter Stadtmauer. Die Blütezeit von Al Zubarah währte nur gut 50 Jahre. 1811 wurde sie bereits wieder zerstört. Einige...

  1. Conjuntivitis alérgica

    Directory of Open Access Journals (Sweden)

    Alejandro Tello Hernández

    2008-07-01

    Full Text Available La conjuntivitis alérgica es una de las causas más comunesde consulta externa en oftalmología y tiene una muy altarelación con las reacciones alérgicas sistémicas. Lafisiopatología de las reacciones de hipersensibilidad noshace entender los cuadros clínicos característicos de estapatología y sus diferentes grados de severidad. Eldiagnostico diferencial es amplio, sin embargo hay clavesdiagnosticas que nos orientan rápidamente al diagnosticocorrecto. El tratamiento se enfoca en las medidasfarmacológicas y no farmacológicas, utilizándolas enconjunto para disminuir la recurrencia del cuadro y prevenirsecuelas visuales.

  2. Superconductivity in Al/Al2O3 interface

    Science.gov (United States)

    Palnichenko, A. V.; Vyaselev, O. M.; Mazilkin, A. A.; Khasanov, S. S.

    2016-06-01

    Metastable superconductivity at Tc ≈ 65 K has been observed in Al foil subjected to special oxidation process, according to the ac magnetic susceptibility and electrical resistance measurements. Comparison of the ac susceptibility and the dc magnetization measurements infers that the superconductivity arises within the interfacial granular layer formed during the oxidation process between metallic aluminum and its oxide.

  3. FTD and ALS: genetic ties that bind.

    Science.gov (United States)

    Orr, Harry T

    2011-10-20

    Curiously, amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD), seemingly disparate neurodegenerative disorders, can be inherited together. Two groups (DeJesus-Hernandez et al. and Renton et al.) show that the long sought after ALS/FTD mutation on chromosomal region 9p is a hexanucleotide expansion in C90RF72. These studies, plus a study on X-linked ALS/FTD, provide molecular starting points for identifying pathways that link ALS and FTD pathogenesis.

  4. Drogodependencia y derecho al honor

    OpenAIRE

    Moliner Navarro, Rosa María

    2014-01-01

    Resulta frecuente hoy la divulgación de la drogodependencia de algunos personajes públicos en los medios que se dedican a la información social. Acudiendo a la jurisprudencia más reciente en la materia, el artículo analiza el habitual conflicto entre el derecho al honor y el derecho a la libertad de información; identifica los criterios actualmente vigentes en la protección del derecho al honor y señala el límite que la libertad de información nunca puede traspasar en la revela...

  5. Al-Qaeda Since 911

    OpenAIRE

    Brahimi, Alia

    2012-01-01

    Seconds after smiling at her local MP and shaking his hand, Roshonara Choudhry plunged a knife into his stomach. The attack on Stephen Timms in May 2010 was not the most high profile assault inspired by al- Qaeda, nor was it fatal. It did, however, offer a commentary on the changing nature of the terrorist threat since 9/11, al-Qaeda’s major impact on international relations as well as its major failure, and the intimate, perhaps inevitable, connection between the two.

  6. La neuroplasticidad aplicada al deporte

    OpenAIRE

    Fernández, Hernán

    2015-01-01

    Me decidí a realizar la siguiente ponencia, para analizar y reconocer la importancia que implica el trabajo cognitivo en el entrenamiento deportivo. El abordaje que efectuaré, está enfocado en el desarrollo del entrenamiento cognitivo, su fundamento y el desarrollo de la neuroplasticidad. Analizaré el concepto de neuroplasticidad y neurogénesis como base al sustento teórico de la neurociencia aplicada al deporte. También remarcaré diversas metodologías prácticas, con su fundamento teóri...

  7. ¿COLOMBIA DEBE APOSTARLE AL SOFTWARE LIBRE, AL DE FUENTE ABIERTA O AL PROPIETARIO?

    Directory of Open Access Journals (Sweden)

    Luis Alberto Girón Murillo

    2014-06-01

    Full Text Available Es complejo para gestores y administradores conocer las implicaciones que la adopción de modelos de desarrollo de software tendría para una región. Este artículo ofrece una evaluación de las implicaciones dinámicas que para el desarrollo de software de una región tendría el apostar de forma excluyente al software libre, al software de fuente abierta y al software propietario. Se desarrolló un modelo de simulación en Vensim de la dinámica de sistemas en donde se evaluaron 3 escenarios: uno en donde se adopta de forma excluyente el software libre, uno en donde se adopta el software propietario y uno en donde se adopta el software de fuente abierta. Se ofrecen descripciones y explicaciones de los resultados que sugieren las potencialidades de cada uno de los modelos de desarrollo evaluados.

  8. Un controesempio al Modus Ponens

    Directory of Open Access Journals (Sweden)

    Vann McGee

    2011-11-01

    Full Text Available La traduzione dell’articolo è stata resa possibile grazie al consenso dell’autore e del Journal of Philosophy. Riferimenti originali: Vann McGee (1985: “A Counterexample to Modus Ponens”, Journal of Philosophy, Vol. 82, No. 9 (Sep. 1985, pp. 462-47. [N.d.T.

  9. Der Nutzer als besserer Fachreferent?

    Directory of Open Access Journals (Sweden)

    Robert Scheuble

    2014-12-01

    Full Text Available Am 9. Juli 2014 veranstaltete der VDB-Regionalverband Südwest in Kooperation mit der Deutschen Nationalbibliothek in Frankfurt am Main eine Fortbildungsveranstaltung zum Thema „Der Nutzer als besserer Fachreferent?”, die sich mit Formen von und Erfahrungen mit nutzergesteuerter Erwerbung (PDA in wissenschaftlichen Bibliotheken beschäftigte.

  10. Kringloop als basis van bedrijfsvoering

    NARCIS (Netherlands)

    Linde, van der A.

    2007-01-01

    Gerard Keurentjes bekijkt zijn bedrijf als kringloop waarin grond en koeien de spil zijn. Het gebruik van microbiotica in plaats van antibiotica past daarin perfect. Een microbioticum bestaat uit een mengsel van acht kruiden opgelost in alcohol. Onderzoek toont aan dat het de productie van witte blo

  11. Al Zubarah - eine vergessene Legende

    DEFF Research Database (Denmark)

    Kinzel, Moritz

    2014-01-01

    Jahre später auf einem Sechstel der ursprünglichen Siedlungsfläche wiedererrichtet und dann im ausgehenden 19. Jahrhundert / beginnenden 20. Jahrhundert endgültig aufgeben. Die Stadt lebt als Legende im Bewusstsein der katarischen Bevölkerung, doch der Name wird heute nicht mit der Stadtanlage sondern...

  12. MOOCs; vanwaar al die ophef?

    NARCIS (Netherlands)

    Henderikx, Maartje; Kreijns, Karel

    2016-01-01

    MOOCs; vanwaar die ophef? Het nog maar zeer recente fenomeen MOOCs (massive open online courses) heeft zich in korte tijd al een onwrikbare positie weten in te nemen in het open online onderwijs. De hype rondom deze nieuwe manier van onderwijs geven bereikte zijn hoogtepunt in 2012, dat prompt werd

  13. First principles calculation of ac conductance for Al-BDT-Al and Al-Cn-Al systems

    Directory of Open Access Journals (Sweden)

    Jia-Ning Zhuang

    2011-12-01

    Full Text Available We perform first-principles calculation to investigate the dynamic conductance of atomic wires of the benzenedithiol (BDT as well as carbon chains with different length in contact with two Al(100 electrodes (Al-Cn-Al. Our calculation is based on the combination of the non-equilibrium Green's function and the density functional theory. For ac conductance, there are two theories that ensures the current conservation: (1. the global formula which is a phenomenological theory that partitions the total displacement current into each leads so that the current is conserved.(2. the local formula which is a microscopic theory that includes Coulomb interaction explicitly so that the current is conserved automatically. In this work, we use the local formula to calculate the dynamic conductance, especially the emittance. We give a detailed comparison and analysis for the results obtained from two theories. Our numerical results show that the global formula overestimates the emittance by two orders of magnitude. We also obtain an inequality showing that the emittance from global formula is greater than that from local formula for real atomic structures. For Al-Cn-Al structures, the oscillatory behavior as the number of carbon chain N varies from even to odd remains unchanged when local formula is used. However, the prediction of local formula gives rise to opposite response when N is odd (inductive-like as compared with that of global formula. Therefore, one should use the local formula for an accurate description of ac transport in nanoscale structures. In addition, the ‘size effect’ of the ac emittance is analyzed and can be understood by the kinetic inductance. Since numerical calculation using the global formula can be performed in orbital space while the local formula can only be used in real space, our numerical results indicate that the calculation using the local formula is extremely computational demanding.

  14. Personalidad y tolerancia al dolor

    Directory of Open Access Journals (Sweden)

    JESÚS M.ª CARRILLO

    2005-01-01

    Full Text Available Se examina la relación de algunas variables de personalidad -EPQ-A (Eysenck y Eysenck, 1975, NEO-PI (McCrae y Costa, 1988 y STA -personalidad esquizotípica- y STB -personalidad límite-, de Claridge y Broks (1984, con la tolerancia al dolor experimental inducido mediante agua fría (cold pressor test, según el procedimiento de Staats, Heckmat y Staats (1998 en una muestra filtrada mediante un cuestionario sobre dolor crónico, dolores de cabeza, de espalda, artritis, síndrome de Raynaud, y personas bajo medicación. La tolerancia al dolor experimental se evaluó mediante el Umbral del dolor (tiempo en segundos desde la introducción de la mano en el agua hasta el primer informe de dolor, Mantenimiento del dolor (duración en segundos de la inmersión de la mano desde la aparición del umbral hasta su retirada y Tolerancia al dolor (duración total en segundos de la inmersión de la mano desde su introducción hasta su retirada. Un análisis correlacional, factorial y de regresión por pasos mostraron un efecto cruzado entre medidas de ansiedad (tolerancia negativa al dolor y psicoticismo, siendo psicoticismo junto con control emocional predictores de tolerancia positiva al dolor. En cuanto a psicoticismo, parece que son sus elementos de naturaleza paranoide y de "dureza" los que afectan a una percepción atenuada del dolor.

  15. Large rectification magnetoresistance in nonmagnetic Al/Ge/Al heterojunctions.

    Science.gov (United States)

    Zhang, Kun; Li, Huan-Huan; Grünberg, Peter; Li, Qiang; Ye, Sheng-Tao; Tian, Yu-Feng; Yan, Shi-Shen; Lin, Zhao-Jun; Kang, Shi-Shou; Chen, Yan-Xue; Liu, Guo-Lei; Mei, Liang-Mo

    2015-09-21

    Magnetoresistance and rectification are two fundamental physical properties of heterojunctions and respectively have wide applications in spintronics devices. Being different from the well known various magnetoresistance effects, here we report a brand new large magnetoresistance that can be regarded as rectification magnetoresistance: the application of a pure small sinusoidal alternating-current to the nonmagnetic Al/Ge Schottky heterojunctions can generate a significant direct-current voltage, and this rectification voltage strongly varies with the external magnetic field. We find that the rectification magnetoresistance in Al/Ge Schottky heterojunctions is as large as 250% at room temperature, which is greatly enhanced as compared with the conventional magnetoresistance of 70%. The findings of rectification magnetoresistance open the way to the new nonmagnetic Ge-based spintronics devices of large rectification magnetoresistance at ambient temperature under the alternating-current due to the simultaneous implementation of the rectification and magnetoresistance in the same devices.

  16. Effect of interface geometry on electron tunnelling in Al/Al2O3/Al junctions

    Science.gov (United States)

    Koberidze, M.; Feshchenko, A. V.; Puska, M. J.; Nieminen, R. M.; Pekola, J. P.

    2016-04-01

    We investigate how different interface geometries of an Al/Al2O3 junction, a common component of modern tunnel devices, affect electron transport through the tunnel barrier. We study six distinct Al/Al2O3 interfaces which differ in stacking sequences of the metal and the oxide surface atoms and the oxide termination. To construct model potential barrier profiles for each examined geometry, we rely on first-principles density-functional theory (DFT) calculations for the barrier heights and the shapes of the interface regions as well as on experimental data for the barrier widths. We show that even tiny variations in the atomic arrangement at the interface cause significant changes in the tunnel barrier parameters and, consequently, in electron transport properties. Especially, we find that variations in the crucial barrier heights and widths can be as large as 2 eV and 5 Å, respectively. Finally, to gain information about the average properties of the measured junction, we fit the conductance calculated within the Wentzel-Kramers-Brillouin approximation to the experimental data and interpret the fit parameters with the help of the DFT results.

  17. ATSAR THARIQAH AL-QIRA'AH AL-MUTAKARRIRAH FI MAHARAH AL-KITABAH

    Directory of Open Access Journals (Sweden)

    Rihlah

    2016-06-01

    Full Text Available This study aimed to reveal the students' writing skill, namely dictation (Imlâ’ and to analyze the use of the repeated reading technique in learning Qirâ'ah Jahriyyah, as well as to determine the effect of the use of al-Qirâ'ah al-Mutakarrirah technique on the students' skills in writing dictation. This method was used to improve students’ reading fluency at the beginners’ level, which was popularized by Samuel in 1979. This research used the experimental method through pretest and posttest control group design. The samples of the research were 44 students consisted of 22 students the experimental class and 22 students of the control class. The analysis of the data applied t-test. The results showed that the use of was significant on the students' writing skill in dictation. It was based on the tcount, 2.64, and ttable, 2.02, at the significance level of 5%. The al-Qirâ'ah al-Mutakarrirah technique was thus effectively used to develop the beginner-leveled students’ writing skill, especially dictation.

  18. Al-Ḥaqīqah al-Muwāfaqah li al-Sharī‘ah: al-Taṣāluḥ bayn al-Taṣawuf wa al-Sharī‘ah bi Nusantara fi al-Qarn al-Sādis ‘Ashr al-Mīlādī

    OpenAIRE

    Iin Suryaningsih

    2013-01-01

    This article discusses the reinterpretation of waḥdat al-wujūd doctrine among Muslims of the archipelago, using the sharī‘ah approach in Sufism as suggested by Al-Būrhanpūrī (d.1620) in his work al-Haqīqah al-Muwāfaqah li al-Sharī‘ah. This work is one of the commentaries (sharḥ) from al-Tuḥfah al-Mursalah ila rūḥ al-Nabī SAW, that invited much debate among Muslims of the archipelago. Al-Būrhanpūrī’s detailed interpretation of waḥdat al-wujūd doctrine proved that the essence of the concep...

  19. Al-Anon and recovery.

    Science.gov (United States)

    Cermak, T L

    1989-01-01

    The history of Al-Anon and its current demographics are reviewed. In order to understand 12-step recovery and psychotherapy for family members of alcoholics, the concept of codependence is defined with a set of diagnostic criteria consistent with the DSM-III-R definition of personality traits and disorders. At the core of codependence are denial and an unrealistic relationship to willpower. The therapeutic implications of considering codependence as a personality disorder are explored, as are the characteristics that make codependence unique among personality disorders: the central role of denial and the existence of a self-help organization to facilitate recovery. The dynamics of working the 12 steps on codependent characteristics are outlined. A synergistic relationship between psychotherapy and the 12 steps is described. Special attention is given the emergence of Al-Anon adult children of alcoholic meetings, and the future of codependence is discussed.

  20. Relativity and Al^+ Optical Clocks

    Science.gov (United States)

    Chou, Chin-Wen; Hume, David B.; Wineland, David J.; Rosenband, Till

    2010-03-01

    We have constructed an optical clock based on quantum logic spectroscopy of an Al+ ion that has a fractional frequency inaccuracy of 8.6x10-18. The frequency of the ^1S0^3P0 clock transition is compared to that of a previously constructed Al^+ optical clock with a statistical measurement uncertainty of 7.0x10-18. The two clocks exhibit a relative stability of 2.8x10-15&-1/2circ;, and a fractional frequency difference of -1.8x10-17, consistent with the accuracy limit of the older clock. By comparing the frequencies of the clocks, we have observed relativistic effects, such as time dilation due to velocities less than 10 m/s and the gravitational red shift from a 0.33 m height change of one of the clocks.

  1. Wear behaviour of Al 261

    Directory of Open Access Journals (Sweden)

    N. Mathan Kumar

    2016-03-01

    Full Text Available Al 2618 matrix material was mixed with the Silicon Nitride (Si3N4, Aluminium Nitride (AlN and Zirconium Boride (ZrB2 reinforced particles. AMC was synthesized successfully by the stir casting method with the various X-wt.% of reinforcements (X = 0,2,4,6,8. Tribological behaviour was studied in this composite with various temperature conditions. The working conditions were Temperature (°C, Load (N, Velocity (m/s and Sliding Distances (m. Before wear testing the mechanical behaviour has been analysed. EDAX was confirmed by the matrix material composition. The Al 2618 alloy and the reinforcement mixers were confirmed by the X-ray Diffraction analysis. Wear rate (mm3/m, Wear resistance (m/mm3, Specific Wear rate (m/Nm and Co-efficient of friction (μ were analysed with various conditions. The worn surfaces were analysed before and after wear testing by Scanning Electron Microscope (SEM. Influence of process parameters and Percentage of contribution were analysed by Taguchi and Analysis of Variance (ANOVA methods. Genetic Algorithm (GA was adopted for optimizing the best and mean of the wear rate and to identify the exact influence of input parameters.

  2. Vormundschaftsrecht als Grundlage politischer Herrschaft

    Directory of Open Access Journals (Sweden)

    Arne Duncker

    2006-07-01

    Full Text Available In ihrer beachtlichen und sehr gewissenhaft dokumentierten Arbeit über vormundschaftliche Regentschaften im 16. und 17. Jahrhundert beschreibt Pauline Puppel unter ausführlichem Bezug auf zeitgenössische Literatur und Archivalien sowohl die allgemeine Rechtslage im damaligen Reich als auch die Anwendungsfälle in Hessen, wo zwischen 1500 und 1700 insgesamt viermal eine Landgräfin als Vormünderin des Fürsten zur Regentin ihres Landes wurde. Dies steht exemplarisch für eine bereits in der Frühen Neuzeit mögliche und nicht einmal ganz seltene Form politischer Frauenherrschaft, die bisher oft nicht hinreichend gewürdigt wurde. Puppels Untersuchung ist in zwei Hauptteile gegliedert. Der erste Teil (Das juristische Regelwerk“, S. 34-143 behandelt die zeitgenössischen Rahmenbedingungen der durch Frauen ausgeübten Vormundschaft und Regentschaft. Der zweite Abschnitt („Die Landgräfinnen von Hessen als Regentinnen“, S. 144-307 befasst sich mit der Ausfüllung dieser Regeln durch konkrete Fallbeispiele in Gestalt von Leben und Regentschaft der regierenden Landgräfinnen von Hessen.

  3. Al Margen de las Cooperativas

    Directory of Open Access Journals (Sweden)

    Gutiérrez Estrada Julio

    1941-04-01

    Full Text Available El sistema Cooperativista, propiamente hablando, no viene a constituir una doctrina económica, es más bien una práctica, un modo de proceder en provecho de determinada agrupación de individuos que se asocian para defenderse de la usura del comercio y del intermediarismo parasitario. "El movimiento cooperativo es tan viejo como la revolución industrial, y ha crecido paralelamente a ella, podría decirse como una protesta en contra del sistema capitalista industrial. Generalmente se considera que tres principios fundamentales determinan su carácter distintivo. 1-Se esfuerza por dar "servido al costo" a sus miembros antes que beneficiarse del negocio con el público en general. El servicio de un grupo organizado se considera como un medio para obtener el máximum de eficacia con mínimo de desperdicio. 2-Insiste en que los beneficios pecuniarios se distribuyan al miembro como productor, después de deducir solamente el interés del capital al tipo que compite, y los salarios y jornales de los trabajadores. 3-Mantiene el control democrático del negocio por todos los participantes en él".

  4. Namadhij Min al-Fikr al-Mali fi al-Islam: Waraqah Ma’lumat Asasiyyah

    Directory of Open Access Journals (Sweden)

    Mustafa Dasuki Kasabah

    2009-03-01

    Full Text Available The renaissance of Islam in various countries has become new phenomenon in the global economy. At the same time it also become the challenge for the Western capitalism and Eastern socialism. This resurrection together with revised ideology and economic system is considered as the strategic solution. Frankly, Islam is the religion which has brought back the core of economy to its position proportionally. In order to get concrete and clear idea on Islamic economy, here the writer presents five books written by Muslim scholars, classic as well as contemporary. The first is Kitab al-Amwal written by Abu Ubaid bin Salam, according to Khalil Harras this book is considered as the best and the most comprehensive book of Islamic economy. The second is Kitab Al-Ahkam al-Sultaniyyah written by Imam Mawardi. The third is Al-Fikr al-Mali written by Ibnu Khaldun, which has high scientific authority from other books, it is systematic as well as contextual. The fourth is al-Iradat al-‘Ammah li al-Daulah al-Islamiyyah fi Sadr al-Islam wa Tatbiqatuha al-Mu’asirah written by Monzer Kahf. The fifth is Al-Nafaqat al-‘Ammah fi Al-Islam: Dirasah Muqaranah written by Yusuf Ibrahim Yusuf. The first three authors are classics and the rest are contemporary.

  5. 77 FR 73732 - In the Matter of Amendment of the Designation of al-Qa'ida in Iraq, aka Jam'at al Tawhid wa'al...

    Science.gov (United States)

    2012-12-11

    ... Designation of al-Qa'ida in Iraq, aka Jam'at al Tawhid wa'al-Jihad, aka The Monotheism and Jihad Group, aka The al-Zarqawi Network, aka al-Tawhid, aka Tanzim Qa`idat al-Jihad fi Bilad al-Rafidayn, aka The Organization of al-Jihad's Base of Operations in Iraq, aka al-Qaida of Jihad in Iraq, aka al-Qaida in Iraq,...

  6. Armaflex in Burj al Arab; Armaflex im Burj al Arab

    Energy Technology Data Exchange (ETDEWEB)

    Steiner, B.

    2003-07-01

    This article describes the Burj al Arab in Dubai, the unique seven-star high-rise hotel. The construction of the hotel, that is built on 250 piles driven into the sand of an artificial island in the Persian Gulf, is described. In particular, various special materials used in the building are described, as are the luxurious fittings and furnishings of the hotel. The cooling and air-conditioning installations that are necessary as a result of the desert climate of Dubai are described and the use of 'Armaflex' elastomer insulating material for the insulation of refrigeration machines and cold-water piping is discussed.

  7. Neues und Bekanntes zur Cellulite. Je mehr Muskulatur, desto weniger Cellulite

    OpenAIRE

    Rümmelein, B; Zindel, C

    2012-01-01

    Fragen zu den Möglichkeiten der Cellulitetherapie gehören in einer dermatologischen Praxis mit Schwerpunkt Ästhetik und Lasermedizin zum Alltag. Die Mehrheit unserer Lehrbücher schweigt jedoch zu diesem Thema.

  8. More effectivity in the gas supply through network codes; Mehr Effektivitaet bei der Gasversorgung durch Netzkodizes

    Energy Technology Data Exchange (ETDEWEB)

    Kremer, Andreas [EVB Energy Solutions GmbH, Velbert (Germany). EVB Akademie

    2013-02-15

    Already in the year 2003, the European Commission has regulated the complete opening of the market by means of the regulation 2003/55/EG in order to develop the European Single Market positively. Practically, in Germany industrial customers can freely choose their gas suppliers since 1st July, 2004, while private customers can choose their gas suppliers since 1st July, 2007. The regulation 2003/55/EG is valid for the gas market inclusive natural gas, liquefied natural gas (LNG), biogas, gas from biomass and any other types of gas which can be transported through the natural gas distribution system.

  9. Greater efficiency for man and machine; Mehr Effizienz fuer Mensch und Maschine

    Energy Technology Data Exchange (ETDEWEB)

    Ramcke, Bernd; Hildebrandt, Tim [Vossloh Locomotives GmbH, Kiel (Germany)

    2010-09-15

    With its new family of shunting locomotives, Vossloh Locomotives sets new standards in technology, safeguarding of investment and consultancy. Alongside three diesel-hydraulic models, the standard portfolio now also includes two diesel-electric models with power output of up to 1,800 kilowatts. The latter models have been designed such that Vossloh will be able to supply spare parts at short notice over a service life of up to 30 years. All locomotives are based on a modular architecture that can be adapted to individual and country-specific requirements depending on the application. In addition, Vossloh has developed innovative tools for the new loco family that enable operators to analyse their locomotives' fuel consumption and optimise it according to their use. (orig.)

  10. Many strategies for enhanced self-consumption; Viele Wege zu mehr Eigenverbrauch

    Energy Technology Data Exchange (ETDEWEB)

    Bruhns, Birthe

    2011-07-01

    Pioneering manufacturers are now launching accumulator systems for solar power plants. They compete to have the most efficient and most reliable system with the best cost-profit ratio. What they have in common is that all of them still demand idealism from their customers.

  11. Bio, Transfair und mehr: Die Kaffeewelt seit den 1950er Jahren bis heute

    OpenAIRE

    2011-01-01

    Der Text wurde – mit kleineren Änderungen – im Anhang der Neuauflage des Buches "Kaffee – Die Biographie eines weltwirtschaftlichen Stoffes" von Heinrich Eduard Jacob (Bd. 2 der WZU-Buchreihe Stoffgeschichten, München, oekom Verlag 2006) abgedruckt. In Ergänzung zu Heinrich Eduard Jacobs Buch wird die Geschichte des Kaffees fortgeführt und die Kaffeewelt bis zur Gegenwart präsentiert.

  12. Energy conservation potentials of up to 35% and more; Einsparpotenziale von 35 % und mehr

    Energy Technology Data Exchange (ETDEWEB)

    Heimberg, Thorsten; Knetsch, Joerg; Martin, Lars; Wagner, Steffen [Rittal GmbH und Co. KG, Herborn (Germany)

    2013-04-01

    The automobile industry sets standards in many areas such as in the topic energy efficiency. Thus, the innovation alliance 'Green Carbody Technologies' aims to realizes a car body manufacturing with 50% lower energy consumption. One of the subprojects within the research project concerned itself with an energy efficient air conditioning of switch control boxes. The company Rittal GmbH and Co. KG (Herborn, Federal Republic of Germany) is involved in this subproject. First results of this subproject are described now.

  13. Open Source, Open Access, Open Review, Open Data. Initiativen zu mehr Offenheit in der digitalen Welt

    OpenAIRE

    Herb, Ulrich

    2011-01-01

    The article discusses the principles of openess, open access and open availability of information based on the examples of open access to scientific information, open government data, open geographical data and open source software.

  14. Microstructure of interaction interface between Al-Si, Zn-Al alloys and Al2O3p/6061Al composite

    Institute of Scientific and Technical Information of China (English)

    许志武; 闫久春; 吕世雄; 杨士勤

    2004-01-01

    Interaction behaviors between Al-Si, Zn-AI alloys and Al2O3p/6061AI composite at different heating temperatures were investigated. It is found that Al2O3p/6061Al composite can be wetted well by AlSi-1, AlSi-4 and Zn-Al alloys and an interaction layer forms between the alloy and composite during interaction. Little Al-Si alloys remain on the surface when they fully wet the composite and Si element in Al-Si alloy diffuses into composite entirely and assembles in the composite near the interface of Al-Si alloy/composite to form a Si-rich zone. The microstructure in interaction layer with Si penetration is still dense. Much more residual Zn-Al alloy exists on the surface of composite when it wets the composite, and porosities appear at the interface of Zn-Al alloy/composite. The penetration of elements Zn, Cu of Zn-Al alloy into composite leads to the generation of shrinkage cavities in the interaction layer and makes the microstructure of Al2 O3p/6061A1 composite loose.

  15. Investigations of Al-Dalang and Al-Hawashat meteorites

    Science.gov (United States)

    Gismelseed, A. M.; Abdallah, S. B.; Al-Rawas, A. D.; Al-Mabsali, F. N.; Widatallah, H. M.; Elzain, M. E.; Yousif, A. A.; Ericsson, T.; Annersten, H.

    2016-12-01

    Mössbauer spectroscopy, X-ray diffraction (XRD) measurements, and electron microprobe analysis (EMPA) have been performed on two meteorites named Al-Dalang and Al-Hawashat after identifying their falling sites in the Western region of Sudan. These two meteorites are ordinary chondrites with similar mineralogy. XRD and EMPA show that the two specimens consist of primary olivine, ortho-pyroxene and later crystallising clino-pyroxene as reaction rims against plagioclase. Fe-metal phases are dominated by kamacite (≈6 wt.% Ni) and minor amounts of tetrataenite (≈52 wt.% Ni). Troilite (FeS) and alabandite (MnS) are optically observed as sulphide phases. The Mössbauer measurements at 295 and 78 K are in agreement with the above characterizations, showing at least two paramagnetic doublets which are assigned to olivine and pyroxene and magnetic sextets assigned to kamacite (hyperfine field ≈33.5 T) and troilite FeS (hyperfine field ≈31 T).

  16. Electrical conductivity of (Na3AlF6-40%K3AlF6)-AlF3-Al2O3 melts

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    The effects of contents of AlF3 and Al2O3,and temperature on electrical conductivity of (Na3AlF6-40%K3AlF6)-AlF3-Al2O3 were studied by continuously varying cell constant (CVCC) technique.The results show that the conductivities of melts increase with the increase of temperature,but by different extents.Every increasing 10 ℃ results in an increase of 1.85×10-2,1.86×10-2,1.89×10-2 and 2.20×10-2 S/cm in conductivity for the (Na3AlF6-40%K3AlF6)-AlF3 melts containing 0%,20%,24%,and 30% AlF3,respectively.An increase of every 10 ℃ in temperature results an increase about 1.89×10-2,1.94×10-2,1.95×10-2,1.99×10-2 and 2.10×10-2 S/cm for (Na3AlF6-40%K3AlF6)-AlF3-Al2O3 melts containing 0%,1%,2%,3% and 4% A12O3,respectively.The activation energy of conductance was calculated based on Arrhenius equation.Every increasing 1% of AlF3 results in a decrease of 0.019 and 0.020 S/cm in conductivity for (Na3AlF6-40%K3AlF6)-AIF3 melts at 900 and 1 000 ℃,respectively.Every increase of 1% Al2O3 results in a decrease of 0.07 S/cm in conductivity for (Na3AlF6-40%K3AlF6)-AlF3-Al2O3 melts.The activation energy of conductance increases with the increase in content of AlF3 and Al2O3.

  17. United modification of Al-24Si alloy by Al-P and Al-Ti-C master alloys

    Institute of Scientific and Technical Information of China (English)

    韩延峰; 刘相法; 王海梅; 王振卿; 边秀房; 张均艳

    2003-01-01

    The modification effect of a new type of Al-P master alloy on Al-24Si alloys was investigated. It is foundthat excellent modification effect can be obtained by the addition of this new type of A1-P master alloy into Al-24Simelt and the average primary Si grain size is decreased below 47 μm from original 225 μm. It is also found that theTiC particles in the melt coming from Al8Ti2C can improve the modification effect of the Al-P master alloy. Whenthe content of TiC particles in the Al-24Si melt is 0.03 %, the improvement reaches the maximum and keeps steadywith increasing content of TiC particles. Modification effect occurs at 50 min after the addition of the Al-P master al-loy and TiC particles, and keeps stable with prolonging holding time.

  18. Kurzwortbildungen als Merkmal der Deutschenrechtssprache

    Directory of Open Access Journals (Sweden)

    Ljubica Kordić

    2013-12-01

    Full Text Available In deutscher Rechtssprache kommen häufig die Nominalkomposita vor, die auf eineim Vergleich mit der Gemeinsprache ungewöhnliche Weise gebildet werden. Diese Wortbildungsform wird in deutschen Grammatiken unterschiedlich bestimmt: als Reduktion, Kurzwortbildung, Kontraktion bzw. Klammerform. Dieser Wortbildungstypkann mit dem Kompositum Mietblock illustriert werden, das durch Verkürzung aus Miet(wohnungsblock entstanden ist. Im Kroatischen, wo Komposition als Wortbildungstyp relativ schwach vertreten ist, ist die Bildung solcher Komposita theoretisch nur angedeutet. Da die Komposita dieses Bildungstyps in deutschen Rechtstexten stark vertreten sind, ist das Ziel dieses Beitrags, auf ihre Gebräuchlichkeit als ein für deutsche Rechtstexte charakteristisches Merkmal hinzuweisen. In der Einleitung befasstsich die Autorin mit der Begriffsbestimmung, der theoretischen Determinierung undder Abgrenzung dieser Kompositionsart von anderen Sonderfällen. Den Hauptteil der Arbeit bildet die Untersuchung der Kurzwortbildungen (Klammerformen, Reduktionen, Verschmelzungen, die dem geltenden deutschen Strafgesetzbuch von 2009 entnommensind, und ihrer kroatischen Entsprechungen. Der Beitrag hat die Aufgabe, auf Grund der gesammelten Belege die Häufigkeit und die Bildungsmuster der Komposita dieses Typs in deutscher Rechtssprache zu bestimmen und durch semantische Transformationsmuster ihren Informationswert in Bezug auf die Konstituenten festzustellen, aus denen sie gebildet wurden. Es wird auch untersucht, welche Bildungstypen ihrekroatischen Äquivalente aufweisen und ob es irgendwelche Unterschiede in ihrem informativen Wert gibt. Die Autorin bedient sich der Methode der Datensammlung, der qualitativen semantischen Analyse der Belege nach den Transformationsmodellen von Fleischer und Barz und der Synthese der Resultate. Die Resultate dieser Untersuchung sollten einen Beitrag zur Erforschung der der Rechtslinguistik im allgemeinen leisten, inbesondere im

  19. Reply to Pachai et al.

    Science.gov (United States)

    Harrison, William J; Bex, Peter J

    2016-05-01

    Peripheral vision is fundamentally limited by the spacing between objects. When asked to report a target's identity, observers make erroneous reports that sometimes match the identity of a nearby distractor and sometimes match a combination of target and distractor features. The classification of these errors has previously been used to support competing 'substitution' [1] or 'averaging' [2] models of the phenomenon known as 'visual crowding'. We recently proposed a single model in which both classes of error occur because observers make their reports by sampling from a biologically-plausible population of weighted responses within a region of space around the target [3]. It is critical to note that there is no probabilistic substitution or averaging process in our model; instead, we argue that neither substitution nor averaging occur, but that these are misclassifications of the distribution of reports that emerge when a population response distribution is sampled. This is a fundamentally different way of thinking about crowding, and on this basis we claim to have provided a mechanism unifying categorically distinct perceptual errors. Our goal was not to model all crowding phenomena, such as the release from crowding when target and flanks differ in color or depth [4]. Pachai et al.[5] have suggested that our model is not unifying because it inaccurately predicts perceptual performance for a particular stimulus. Although we agree that our model does not predict their data, this specific demonstration overlooks the critical aspect of the model: perceptual reports are drawn from a weighted population code. We show that Pachai et al.'s [5] own data actually provide evidence for the population code we have described [3], and we suggest a biologically-plausible analysis of their stimuli that provides a computational basis for their 'grouping' account of crowding.

  20. A melancolia em Al Berto

    OpenAIRE

    Camila Emanuele Martins de Souza

    2015-01-01

    Este trabalho objetiva estudar, sob a perspectiva da melancolia, os livros Salsugem (1984) e Horto de Incêndio (1997), de Al Berto. O autor português produz escritos em que a temática da melancolia atravessa a palavra, o que justifica o debruçar-se sobre as construções textuais da poética albertiana, a fim de traçar-lhe novas possibilidades de leitura por esse ângulo. Para isso, com o intuito de compreender o discurso melancólico segue-se o embasamento teórico: de Klibansky, Panosfsky e Saxl ...

  1. Alí Caro, alarife

    OpenAIRE

    2009-01-01

    Quizá el más sobresaliente sea el de Alí Caro, un alarife que a finales del siglo xv proyectó y dirigió la construcción del castillo de Coca, la obra más insigne de la arquitectura militar mudéjar del siglo xv castellano. Efectivamente, encontramos que hacia 1486 fue reclamado por don Alonso FonsecaAvellaneda, señor de las villas de Coca y Alaejos, para levantar un impresionante castillo -que, a la vez, cumpliría las funciones de palacio nobiliar- en Coca, con la ayuda de sus hermanos Yuc;...

  2. La heredad junto al llanto

    Directory of Open Access Journals (Sweden)

    Javier Arias Ramírez

    1962-11-01

    Full Text Available En "La heredad junto al llanto", Carlos Palacio La verde canta todo lo elemental y simple con sobriedad y elegancia que dan mérito a su poesía. Por eso consideramos un acierto de sus editores el divulgar la obra de este joven poeta, que como dice en su introducción René Uribe Ferrer, no es conocido porque ha rehuido casi sistemáticamente la publicidad, lo cual me asegura que en este proceder hay una grande honestidad intelectual, una verdadera personalidad poética.

  3. Personalidad y tolerancia al dolor

    OpenAIRE

    JESÚS M.ª CARRILLO; SUSANA COLLADO; NIEVES ROJO

    2005-01-01

    Se examina la relación de algunas variables de personalidad -EPQ-A (Eysenck y Eysenck, 1975), NEO-PI (McCrae y Costa, 1988) y STA -personalidad esquizotípica- y STB -personalidad límite-, de Claridge y Broks (1984), con la tolerancia al dolor experimental inducido mediante agua fría (cold pressor test), según el procedimiento de Staats, Heckmat y Staats (1998) en una muestra filtrada mediante un cuestionario sobre dolor crónico, dolores de cabeza, de espalda, artritis, síndrome de Raynaud, y ...

  4. Gettysburg: Monumento al mundo libre

    Directory of Open Access Journals (Sweden)

    Neutra, Richard J.

    1961-12-01

    Full Text Available En el verano del año 1958 fui invitado, por las autoridades de la Universidad de Arizona, en Tucson, a la colocación de la primera piedra de su futuro taller, construido para favorecer el desarrollo técnico del Estado. Varios alcaldes y ministros presenciaron la ceremonia, que fue muy interesante, y uno de los periodistas presentes, John Riddick, del "Tucson Daily Citizen", invitó cordialmente, a mi esposa y a mí, a atravesar, al día siguiente, la frontera mejicana, que cruzaba un vasto desierto.

  5. Al-Ḥaqīqah al-Muwāfaqah li al-Sharī‘ah: al-Taṣāluḥ bayn al-Taṣawuf wa al-Sharī‘ah bi Nusantara fi al-Qarn al-Sādis ‘Ashr al-Mīlādī

    Directory of Open Access Journals (Sweden)

    Iin Suryaningsih

    2013-04-01

    Full Text Available This article discusses the reinterpretation of waḥdat al-wujūd doctrine among Muslims of the archipelago, using the sharī‘ah approach in Sufism as suggested by Al-Būrhanpūrī (d.1620 in his work al-Haqīqah al-Muwāfaqah li al-Sharī‘ah. This work is one of the commentaries (sharḥ from al-Tuḥfah al-Mursalah ila rūḥ al-Nabī SAW, that invited much debate among Muslims of the archipelago. Al-Būrhanpūrī’s detailed interpretation of waḥdat al-wujūd doctrine proved that the essence of the concept did not contradict the basic principles of Islam as contained in the Quran and Hadith. Al-Būrhanpūrī  interpreted the concept through explanations that adjusted to the audience’s competence, utilizing oral language carefully in revealing spiritual experience not easily explained, as well as employing the bases of sharī‘ah. Al-Haqīqah al-Muwāfaqah has provided the information about the explanations of interpretation tradition among the archipelago sufis.Copyright (c 2014 by SDI. All right reserved.DOI: 10.15408/sdi.v20i1.350 

  6. Betaalde arbeid als verdringer van vrijwilligerswerk? Overbelasting als mogelijke verklaring

    Directory of Open Access Journals (Sweden)

    Angela Kok-Van Meer

    2014-06-01

    Full Text Available Do paid work activities displace volunteering? A potential explanation from role overload theoryRecent changes in Dutch society might lead to a shortage of volunteers. On the one hand, the demand for volunteers is increasing: in the social welfare domain because of governmental austerity policies and in other domains such as sports because of the higher supervision intensity of activities. On the other hand, the supply of volunteers is likely to decrease as more and more women and older workers are active in the labor market, which reduces the time that is available for volunteering. Role overload theory would suggest that the increasing labor participation rate of certain categories of workers goes along with a decline of participation in voluntary work. The secondary data analysis shows that various role loads (work, care for children living at home are associated with differences in participation in voluntary work. However, while a higher number of contractual work hours and hours spent on work-related training are negatively associated with volunteer work, care for children living at home is positively associated with volunteering. These results provide only limited support for role overload theory.Betaalde arbeid als verdringer van vrijwilligerswerk? Overbelasting als mogelijke verklaringDe afgelopen jaren hebben zich enkele maatschappelijke veranderingen voorgedaan, die wellicht tot schaarste op de Nederlandse vrijwilligersmarkt zouden kunnen leiden. Enerzijds neemt de vraag naar vrijwilligers toe doordat subsidieregelingen versoberen (bijvoorbeeld in zorg en welzijn en de begeleidingsintensiteit in bepaalde organisaties stijgt (bijvoorbeeld in sport. Anderzijds neemt het aanbod van vrijwilligers af doordat vrouwen en ouderen meer en langer op de arbeidsmarkt actief zijn, waardoor minder tijd beschikbaar is voor vrijwilligerswerk. In dit artikel wordt aan de hand van de role overload theorie nagegaan of het al dan niet deelnemen aan

  7. Vom Gewohnheitstier zur reflektierten Nutzung – Ein Diskussionsanstoß über Betriebssysteme und Programmnutzung nachzudenken

    Directory of Open Access Journals (Sweden)

    Christian Berger

    2010-06-01

    Full Text Available Das Nutzungsverhalten bei digitalen Medien entspringt mehr der Gewohnheit als dem vorhandenen Angebot. Ein kleiner Einblick in die Philosophie und Möglichkeiten der Nutzung von Freier Software.

  8. Facts zur Qualität der Biomilch

    OpenAIRE

    2005-01-01

    Die Qualität von Biomilch ist mehr als Zellzahlen und Keimzahlen. Sie kann nur durch eine ganzheitliche Betrachtung erfasst werden. Dazu gibt es auch interessante Erkenntnisse aus einer Reihe von Studien.

  9. Ti_3AlC_2-Al_2O_3-TiAl_3 composite fabricated by reactive melt infiltration

    Institute of Scientific and Technical Information of China (English)

    HE Shan-shan; YIN Xiao-wei; ZHANG Li-tong; LI Xiang-ming; CHENG Lai-fei

    2009-01-01

    Porous preforms were fabricated by cold-pressing process using powder mixture of TiC, TiO_2 and dextrin. After pyrolysis and sintering, Al melt was infiltrated into the porous preforms, leading to the formation of Ti_3AlC_2-Al_2O_3-TiAl_3 composite. Effects of cold-pressing pressure of preforms on microstructures and mechanical properties of the composites were studied. Synthesis mechanism and toughening mechanism of composite were also analyzed. The results shows that TiO_2 is reduced into Ti_2O_3 by carbon, the decomposition product of dextrin, which causes the spontaneous infiltration of Al melt into TiC/Ti_2O_3 preform. Then, Ti_3AlC_2-Al_2O_3-TiAl_3 composite is in-situ formed from the simultaneous reaction of Al melt with TiC and Ti_2O_3. With the increase of cold-pressing pressure from 10 MPa to 40 MPa, the pore size distribution of the preforms becomes increasingly uniform after pre-sintering, which results in the reduction of defects, and the decrease of property discrepancy of composites. Nano-laminated Ti_3AlC_2 grains and Al_2O_3 particles make the fracture toughness of TiAl_3 increase remarkably by various toughening mechanisms including stress-induced microcrack, crack deflection and crack bridging.

  10. Ce对Al-Si-Cu合金中α(Al)-Al2Cu共晶形貌的影响%Effect of Ce on morphology ofα(Al)-Al2Cu eutectic in Al-Si-Cu alloy

    Institute of Scientific and Technical Information of China (English)

    Maja VONINA; Joef MEDVED; Tonica BONINA; Franc ZUPANI

    2014-01-01

    The effect of Ce addition on the morphology of the α(Al)-Al2Cu eutectic in Al-Si-Cu alloy was investigated using thermal analysis, light microscopy, scanning electron microscopy, focused ion beam and energy dispersive analysis. The results show that the eutectic α(Al)-Al2Cu forms within small space between dendrites, silicon and AlSiFeMn plates. Eutectic Al2Cu is not lamellar but degenerated. However, Al2Cu in Ce-modified alloys is more compact. Ce partially dissolves in Al2Cu, which is a viable reason for the formation of coarser Al2Cu. The addition of Ce also increases the microhardness of theα(Al)-Al2Cu eutectic by almost 10%compared with the basic Al-Si-Cu alloy.%采用热分析、光学显微镜技术、扫描电镜技术、聚焦离子束和能量色散谱分析方法研究Ce对Al-Si-Cu合金中α(Al)-Al2Cu共晶形貌的影响。结果表明,在枝晶、硅和AlSiFeMn之间较小空间内形成了α(Al)-Al2Cu共晶。Al2Cu为非层状的不规则共晶组织。Al2Cu在经Ce改性的合金中更加致密。部分Ce溶解于Al2Cu中,这是粗晶Al2Cu形成的原因。与基体Al-Si-Cu合金相比,Ce的加入能使α(Al)-Al2Cu共晶合金的显微硬度提高约10%。

  11. con bajo peso al nacer

    Directory of Open Access Journals (Sweden)

    Adriana Mora Antó

    2005-01-01

    Full Text Available Esta investigación dio cuenta de la relación entre el estilo de funcionamiento familiar, los patrones de crianza y las edades de desarrollo evolutivo en niños, nacidos con bajo peso. El estudio descriptivo correlacional se realizó con 41 niños y sus madres, aplicándose cuestionarios sobre funcionamiento familiar, prácticas de crianza y desarrollo infantil. Los resultados señalaron la existencia de un funcionamiento familiar caracterizado por una cohesión amalgamada y una adaptabilidad caótica, una disciplina complaciente, falta de control y de límites claros en la díada madre-hijo. Se trataba de familias monoparentales, donde la temprana edad de concepción, el madresolterismo y el apoyo de la familia extensa eran constantes. Las edades evolutivas registradas indicaron un desarrollo inferior a la edad cronológica, en la mayor parte de los casos; sin embargo, éstas tendieron a ser superiores al compararlas con la edades reales de los infantes. No se encontró una correlación estadísticamente significativa entre la edad de desarrollo y los diferentes factores del funcionamiento familiar para algunos de los rangos de edad considerados; sin embargo, no se lo descartó por completo, especialmente en lo referente al optimismo familiar

  12. Everyday Life with ALS: A Practical Guide

    Science.gov (United States)

    ... the wheelchair plus its user, and more. Van shoppers can buy from a mobility dealer or directly ... Life with ALS: A Practical Guide 65 Connect Online with the ALS Community! MDA’s free online community — ...

  13. Formaline of alternatieven als ontsmettingsmiddel voor broedeieren

    NARCIS (Netherlands)

    Meijerhof, R.; Dijk, D.

    1997-01-01

    Formaline wordt algemeen gezien als een goed middel om broedeieren te ontsmetten. Toch geeft ontsmetting met middelen als ozon en waterstofperoxyde vaak een iets beter broedresultaat. Een eventuele verklaring hiervoor is momenteel nog niet te geven.

  14. Cenomanian-Turonian biostratigraphy of the Jardas Al Abid area, Al Jabal Al Akhdar, northeast Libya

    Science.gov (United States)

    El Qot, Gamal M.; Abdulsamad, Esam O.

    2016-09-01

    The Upper Cenomanian-Turonian succession exposed at Jardas al'Abid area consists mainly of carbonates with siliciclastic intercalations. This succession is subdivided lithostratigraphically into: Qasr al'Abid (Late Cenomanian) and Al Baniyah (Late Cenomanian-Coniacian) formations. This sequence is relatively rich in macrofossil assemblages especially bivalves, gastropods, and echinoids with rare ammonites. Based on the first occurrence (FO) and last occurrence (LO) of some index species of these macrofossil groups, an integrated biostratigraphic framework has been constructed. The studied Cenomanian-Turonian sequence is subdivided biostratigraphically into three ammonite biozones; Pseudaspidoceras pseudonodosoides Total Range Zone, Choffaticeras segne Total Range Zone, and Coilopoceras requienianum Total Range Zone. Based on the rest of macrofossil assemblages other than the ammonites, eight biozones were recognized; Mecaster batnensis Total Range Zone, Ceratostreon flabellatum-Neithea dutrugei Acme Zone, Costagyra olisiponensis Acme Zone, Pycnodonte (Phygraea) vesicularis vesiculosa Acme Zone, Mytiloides labiatus Total Range Zone = Mecaster turonensis Acme Zone, Rachiosoma rectilineatum-Curvostrea rouvillei-Tylostoma (T.) globosum Assemblage Zone, Radiolites sp.-Apricardia? matheroni Total Range Zone, and Nerinea requieniana Total Range Zone. Most of the proposed biozones are recorded for the first time from Libya. The integration among these biozones as well as local and inter-regional correlation of the biozones have been discussed. The stage boundaries of the studied stratigraphic intervals are discussed, where the Cenomanian/Turonian boundary is delineated at the last occurrence (LO) of Pseudaspidoceras pseudonodosoides (Choffat), while the Turonian/Coniacian boundary is delineated arbitrary being agree with the LO of the Turonian fauna.

  15. Grainreifnementlimit of commercialpureAl inoculatedbyAl-Ti-C(B)masteralloys

    Institute of Scientific and Technical Information of China (English)

    En-zhao Wang; Xiang-fa Liu

    2015-01-01

    The grain reifnement limits of commercial pure Al inoculated by Al-5Ti-1B, Al-5Ti-0.25C and Al-5Ti-0.3C-0.2B master al oys were studied, and the inlfuence of melting temperature on the grain reifning performance of these three master al oys was investigated using a high scope video microscope (HSVM), a ifeld-emission scanning electron microscope (FESEM), an electron probe micro-analyzer (EPMA) and X–ray diffraction (XRD) method. Results show that there is a grain reifnement limit of commercial pure Al reifned by these three master al oys; with the same addition level of 1.5% under the present experimental conditions, the grain reifnement limits (smal est average grain size) of commercial pure Al reifned by Al-5Ti-1B, Al-5Ti-0.25C and Al-5Ti-0.3C-0.2B master al oys are 50 µm, 80 µm and 80 µm, respectively. In addition, with an increase in the melting temperature of the pure Al, the grain reifning performance of Al-5Ti-1B and Al-5Ti-0.25C master al oys decreases, but the grain reifning performance of Al-5Ti-0.3C-0.2B changes little.

  16. Framework Al zoning in zeolite ECR-1.

    Science.gov (United States)

    Shin, Jiho; Ahn, Nak Ho; Cho, Sung June; Ren, Limin; Xiao, Feng-Shou; Hong, Suk Bong

    2014-02-25

    Rietveld analyses of the synchrotron X-ray diffraction data for various cation forms of zeolite ECR-1 have demonstrated framework Al zoning, which parallels the alternation of Al-rich maz and Al-poor mor layers. This can be further supported by notable differences in the average bond valence of its 10 crystallographically distinct tetrahedral sites.

  17. Electroplating Zn-Al Alloy Technology

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    The method of controlling separating anode and separating power source was used to perform orthogonal optimization for the parameters in electroplating Zn-Al alloy.The electroplating Zn-Al alloy technology was decided, in which the content of Al is about 12%-15%.

  18. Transport Properties of the Tunnel Junctions Al1-xCox/{Al1-xCox-oxide}/Al

    Institute of Scientific and Technical Information of China (English)

    X.F.Han; J. Murai; H.Kubota; Y.Ando; Q.Y.Wang; N.Tezuka; T.Miyazaki

    2000-01-01

    The oxides of Al1-xCox (x=0,0.25,0.5,0.75, and 1.0) alloys were chosen as barrier materials in this work. The tunnel junction consists of the bottom electrode Al1-xCox and the top electrode Al with an insulating layer { Al1-xCox-oxide} which was formed by natural oxidation in a baking-box at 333K. The oxidation time for forming an Al1-xCox-oxide layer on the surface of the bottom Al1-xCox layers were optimized.The resistance of Al1-xCox/{ Al1-xCox-oxide}/Al tunnel junctions varied between 101 and 106 Ω measured at 1 my and 4.2 K. The effective barrier height and width of insulating layers Al1-xCox-oxide ( x=0.25, 0.5, and 0.75 )varied between 0.6 and 2.7 eV and between 1.3 and 2.1 nm. It is shown that the thin oxide layer of Al1-xCox alloys can be chosen as barrier materials.

  19. Oxidation protection of NiCoCrAlY coatings on γ-TiAl

    Institute of Scientific and Technical Information of China (English)

    WANG Qi-min; GUO Ming-hu; KE Pei-ling; GONG Jun; SUN Chao; WEN Li-shi

    2005-01-01

    The effect of NiCoCrAlY overlay coatings on the oxidation resistance of γ-TiAl was studied at 900 ℃ in static air. To hinder the interdiffusion of the elements, the Al/Al2O3 layer was added between the coating and the alloy. The results show that the TiAl alloy exhibits poor oxidation resistance. NiCoCrAlY coating can not effectively protect the γ-TiAl substrate from high temperature oxidation because of the serious interdiffusion between the coating and the substrates. With Al/Al2O3 diffusion barrier, the NiCoCrAlY coating exhibits excellent oxidation protection on γ-TiAl alloy.

  20. Trato verbal paterno al adolescente

    Directory of Open Access Journals (Sweden)

    Rodríguez Juan Carlos

    1995-06-01

    Full Text Available

    En alguna ocasión se ha escuchado una palabra, que causa un sentimiento y a la vez un recuerdo, que lleva a evocar la adolescencia o la infancia, se recuerda quien la pronunciaba y en que ocasión la decía. Este es el poder que tiene una palabra y más aún si es dicha por el padre, puesto que este es la figura significativa que se lleva en la memoria. De aquí nace el interés de realizar un estudio, en donde se describe y analice la percepción y el sentimiento del adolescente, quien en esta etapa es vulnerable al cambio, ya que está buscando su propia identidad; que con el trato verbal paterno la encontrara sin ninguna dificultad o por el contrario nunca la encontrará.

     

  1. Entscheidung als Häresie

    Directory of Open Access Journals (Sweden)

    Jaanus Sooväli

    2014-06-01

    Full Text Available Man könnte sagen, dass Aristoteles so etwas wie eine traditionelle und dominierende Auffassung der Entscheidung in der westlichen Philosophie gründet. Das Ziel dieses Aufsatzes ist es, diese Auffassung von Aristoteles zu entwerfen, einige ihrer wichtigsten Probleme anzusprechen, und sie damit zu kontrastieren, was ich Jacques Derridas häretische „Konzeptualisierung“ der Entscheidung nennen würde. Es wird gezeigt, dass diese häretische Thematisierung von Derrida nicht nur und einfach mit dem traditionellen aristotelischen Begriff bricht, sondern vielmehr auch zu Recht einige seiner wichtigsten Züge auf solcher Weise schärft, dass von diesem radikalisierten Standpunkt die Behandlung von Aristoteles als die Annullierung der Entscheidung zum Vorschein kommt. Es wird zudem impliziert, wie Derridas häretische Auffassung die Erneuerung der Ethik und Politik mit sich bringt.

  2. Online-Dienstleistung als Herausforderung für AnbieterInnen unter besonderer Berücksichtigung der Situation in Österreich

    Directory of Open Access Journals (Sweden)

    Birgit Kollek

    2006-03-01

    Full Text Available Online-Beratung findet zunehmend auch im Dienstleistungssektor statt und damit nicht mehr nur im psychosozialen Beratungskontext. Gerade die Interaktivität des Mediums Internet macht dabei den Reiz für AnbieterInnen aus, die Dienstleistungsangebote auch im virtuellen Raum den KundInnen anzubieten. Der Artikel beleuchtet die notwendigen Schritte und Sichtweisen für eine professionelle Projektplanung solcher Angebote im Internet unter besonderer Berücksichtigung der Situation in Österreich.

  3. Friction Stir Welding of Al 5052 with Al 6061 Alloys

    Directory of Open Access Journals (Sweden)

    N. T. Kumbhar

    2012-01-01

    Full Text Available Friction stir welding (FSW, a solid-state joining technique, is being extensively used in similar as well as dissimilar joining of Al, Mg, Cu, Ti, and their alloys. In the present study, friction stir welding of two aluminium alloys—AA6061 and AA5052—was carried out at various combinations of tool rotation speeds and tool traverse speeds. The transverse cross-section of the weld was used for optical as well as electron microscopy observations. The microstructural studies were used to get an indication of the extent of material mixing both at the macro- and microscales. It was observed that, at the interface region, both materials exhibited similar texture despite the nonrigorous mixing of the materials in the nugget. The extent of interdiffusion of alloying elements at the interface was studied using electron probe microanalysis. The tensile testing evaluation of these specimens showed good mechanical properties. The interdiffusion of alloying elements and development of similar orientations in the nugget could have contributed to the better tensile properties of the friction-stir-welded AA5052-AA6061 specimens.

  4. Al-Fe-Si、Al-Mn-Si与Al-Fe-Mn-Si体系热力学描述的更新%Update of Al-Fe-Si, Al-Mn-Si and Al-Fe-Mn-Si thermodynamic descriptions

    Institute of Scientific and Technical Information of China (English)

    陈海林; 陈清; 杜勇; Johan BRATBERG; Anders ENGSTR(O)M

    2014-01-01

    采用Calphad方法对Al-Fe-Mn-Si四元系及其子体系进行热力学评估.首先,通过考虑文献中最新的实验研究结果以及对部分三元化合物应用新的热力学模型,修正Al-Fe-Si三系的热力学描述,显著地改善了整个成分范围内、尤其是富Al角的液相面投影图.随后,对三元化合物α-AlMnSi和β-AlMnSi采用新的模型,精修Al-Mn-Si体系富Al角的热力学描述.然后,通过模拟α-AlMnSi相在Al-Fe-Mn-Si体系中的固溶度,优化Al-Fe-Mn-Si四元系富Al角的热力学描述.在优化时,对α-AlMnSi作特殊考虑并加入限制条件,以确保其不会在Al-Fe-Si三元系中变得稳定.最后,将所获得的热力学描述加入TCAL数据库,通过一系列的相平衡计算与凝固模拟、以及与商业铝合金的实验数据的比较,对所获得的热力学描述进行全面的验证.更新后的TCAL数据库能够可靠地预测Al-Fe-Si基与Al-Fe-Mn-Si基合金中的相形成.

  5. Preparation and Characterization of Highly Flexible Al2O3/Al/Al2O3 Hybrid Composite

    Directory of Open Access Journals (Sweden)

    Zhijiang Wang

    2015-01-01

    Full Text Available The natural brittleness of oxide ceramics heavily inhibits their more extensive applications. In present research, a highly flexible Al2O3/Al/Al2O3 hybrid composite was fabricated by employing plasma electrolysis oxidation to in situ grow alumina layers on Al foil, in which an outside layer of nanostructured polycrystalline oxide ceramic was composed of nanosized grains with the size of around 17 nm. Due to shear band formation, nanosized circle bubbles prolonging the crack path, grain rotation, and deformation, the fabricated Al2O3/Al/Al2O3 hybrid composite contains no observable cracks even after being bent on a cylindrical bar with a curvature of 1.5 mm. The composite exhibits alumina stiffness at the elastic stage and aluminum ductility during plastic deformation, which provides high flexibility with the well-integrated properties of the components. In a synergistic interaction, the alumina on the outside exhibited a strain of 0.33% at room temperature, which was higher than optimum value of 0.25% presented by reported most flexible oxide ceramics. With the unique characteristics and properties, the Al2O3/Al/Al2O3 composite demonstrates a great potential for various engineering applications.

  6. Cryptanalysis of Lin et al.'s Efficient Block-Cipher-Based Hash Function

    NARCIS (Netherlands)

    Liu, Bozhong; Gong, Zheng; Chen, Xiaohong; Qiu, Weidong; Zheng, Dong

    2010-01-01

    Hash functions are widely used in authentication. In this paper, the security of Lin et al.'s efficient block-cipher-based hash function is reviewed. By using Joux's multicollisions and Kelsey et al.'s expandable message techniques, we find the scheme is vulnerable to collision, preimage and second

  7. Magnetism of Al-substituted magnetite reduced from Al-hematite

    Science.gov (United States)

    Jiang, Zhaoxia; Liu, Qingsong; Zhao, Xiang; Roberts, Andrew P.; Heslop, David; Barrón, Vidal; Torrent, José

    2016-06-01

    Aluminum-substituted magnetite (Al-magnetite) reduced from Al-substituted hematite or goethite (Al-hematite or Al-goethite) is an environmentally important constituent of magnetically enhanced soils. In order to characterize the magnetic properties of Al-magnetite, two series of Al-magnetite samples were synthesized through reduction of Al-hematite by a mixed gas (80% CO2 and 20% CO) at 395°C for 72 h in a quartz tube furnace. Al-magnetite samples inherited the morphology of their parent Al-hematite samples, but only those transformed from Al-hematite synthesized at low temperature possessed surficial micropores, which originated from the release of structural water during heating. Surface micropores could thus serve as a practical fingerprint of fire or other high-temperature mineralogical alteration processes in natural environments, e.g., shear friction in seismic zones. In addition, Al substitution greatly affects the magnetic properties of Al-magnetite. For example, coercivity (Bc) increases with increasing Al content and then decreases slightly, while the saturation magnetization (Ms), Curie temperature (Tc), and Verwey transition temperature (Tv) all decrease with increasing Al content due to crystal defect formation and dilution of magnetic ions caused by Al incorporation. Moreover, different trends in the correlation between Tc and Bc can be used to discriminate titanomagnetite from Al-magnetite, which is likely to be important in environmental and paleomagnetic studies, particularly in soil.

  8. MARTENSITIC TRANSFORMATION AND THERMAL STABILITY IN Cu-Al-Co AND Cu-Al-Zr ALLOYS

    Institute of Scientific and Technical Information of China (English)

    Y. Q. Ma; C.B. Jiang; H.B. Xu

    2003-01-01

    Cu-Al-Co and Cu-Al-Zr alloys were explored with Co or Zr additions in Cu-Al alloys for high temperature shape memory alloys. Samples were quenched after homogenized at 850℃ for 48h. It was found that both Cu-Al-Co and Cu-Al-Zr show AlCu3 martensitic phase at room temperature and exhibit martensitic transformation temperatures higher than 200℃, showing the potentials for developing as high temperature shape memory alloys. Thermal cycles were performed by DSC instrument on both Cu-Al-Co and Cu-Al-Zr alloys. The results show that Cu-Al-Co loses its martensitic transformation after five thermal cycles, and Cu-Al-Zr exhibits no martensitic transformation in the second thermal cycle.

  9. STUDY ON THE THERMODYNAMICS OF CuO/Al IN SITU Al2O3 REINFORCED Al MATRIX COMPOSITES

    Institute of Scientific and Technical Information of China (English)

    Y.Ma; Y.Hao; S.Z.Kou; X.N.Lu

    2004-01-01

    Based on the experiment and the thermodynamics analysis for CuO/Al system, it is founded that the compounding reaction of CuO/Al under low temperature is available. The general equation of adiabatic temperature of the system is set up, and the influence of resultant concentration and temperature on adiabatic temperature is theoretically analyzed. The values of heat effect of CuO/Al system under different temperature are also caculated.

  10. Entrevista al narrador Tommaso Pincio

    Directory of Open Access Journals (Sweden)

    Franco Zangrilli

    2016-07-01

    Full Text Available El autor Tommaso Pincio, seudónimo di Marco Colapietro (Roma, 1963, es sin lugar a dudas uno de los narradores de mayor proyección en el panorama literario de los últimos tiempos. Iniciada su carrera en 1999 con M., ha publicado títulos como Lo spazio sfinito (2000 y Un amore dell'altro mondo (2002, en el que narra la vida de Kurt Cobain, líder del grupo Nirvana, a través de la visión de un amigo imaginario. A estas dos novelas siguieron La ragazza che non era lei (2005, Gli alieni (2006 o Cinacittà. Memorie del mio delitto efferato (2008, ambientada en una Roma colonizada por los chinos y abandonada por los mismos romanos a causa de problemas medioambientales. Títulos como L'hotel a zero stelle (2011, un ensayo autobiográfico en el que plantea diálogos ficticios con algunos de los grandes nombres de la literatura o la más reciente Panorama (2015, le han hecho valerse un hueco provilegiado entre los nuevos narradores surgidos en estas primeras décadas de siglo. Justamente la publicación de esta última novela, Panorama, ha servido de excusa al profesor Franco Zangrilli, gran conocedor de su obra, a plantearle algunas preguntas sobre temas clave de su producción.

  11. Al-Si/Al2O3 in situ composite prepared by displacement reaction of CuO/Al system

    Directory of Open Access Journals (Sweden)

    Zhang Jing

    2010-02-01

    Full Text Available Al2O3 particle-reinforced ZL109 composite was prepared by in situ reaction between CuO and Al. The microstructure was observed by means of OM, SEM and TEM. The Al2O3 particles in sub-micron sizes distribute uniformly in the matrix, and the Cu displaced from the in situ reaction forms net-like alloy phases with other alloy elements. The hardness and the tensile strength of the composites at room temperature have a slight increase as compared to that of the matrix. However, the tensile strength at 350 ℃ has reached 90.23 MPa, or 16.92 MPa higher than that of the matrix. The mechanism of the reaction in the CuO/Al system was studied by using of differential scanning calorimetry(DSC and thermodynamic calculation. The reaction between CuO and Al involves two steps. First, CuO reacts with Al to form Cu2O and Al2O3 at the melting temperature of the matrix alloy, and second, Cu2O reacts with Al to form Cu and Al2O3 at a higher temperature. At ZL109 casting temperature of 750–780 ℃, the second step can also take place because of the effect of exothermic reaction of the first step.

  12. Derecho civil : aproximaciones al derecho de personas

    OpenAIRE

    2005-01-01

    Las universidades de hoy, siguiendo las últimas tendencias de docencia universitaria que proponen minimizar la participación del profesor en la tarea del aprendizaje, han trasladado al estudiante al esfuerzo de apropiarse de la información necesaria para el conocimiento de las ciencias; Sin embargo, los libros y documentos que se entregan al estudiante para que se empape de los conceptos fundamentales siguen siendo textos fríos y desapacibles cuya utilidad estaba ligada a las explicaciones pr...

  13. Fabrication of AlN-TiC/Al composites by gas injection processing

    Institute of Scientific and Technical Information of China (English)

    YU Huashun; CHEN Hongmei; MA Rendian; MIN Guanghui

    2006-01-01

    The fabrication of AlN-TiC/Al composites by carbon-and nitrogen-containing gas injection into Al-Mg-Ti melts was studied. It was shown that AlN and TiC particles could be formed by the in situ reaction of mixture gas (N2+C2H2+NH3) with Al-Mg-Ti melts. The condition for the formation of AlN was that the treatment temperature must be higher than 1373 K, and the amounts of AlN and TiC increased with the increase of the treatment temperature and the gas injection time.It was considered that AlN was formed by the direct reaction of Al with nitrogen-containing gas at the interface of the gas bubble and the melt. However, the mechanism of TiC formation is a combination mechanism of solution-precipitation and solid-liquid reaction.

  14. Casting fabrication of in situ Al3Ti-Al composites and their wear behaviors

    Institute of Scientific and Technical Information of China (English)

    Chen Tijun; Li Jian; Hao Yuan

    2009-01-01

    The Al3li intermetallic reinforced pure Al, Al-13Si and Al-17Cu matrix composites were prepared by casting method. Their microstructures and dry sliding wear behaviors at room temperature and 100℃ were particularly investigated. The results indicated that the Al3Ti phases in these composites were all in flaky form. But the aspect ratio of the Al3Ti platelets decreased with the increase of Ti content in the pure AI, Al-Cu and Al-Si matrix composites, in order of effectiveness. The effect of Si on the Al3Ti morphology seemed to be greater than that of Cu. The distributions of the Al3Ti platelets were different in the different matrix composites, leading to different grain refining effects. Except for the sub-wear regime of adhesive wear, the plastic deformation induced wear was a dominant wear mechanism for all of the composites at room temperature and 100℃. Increasing the testing temperature, decreasing the Al3Ti content or the hardness of materials could enhance these two wear mechanisms, and thus increase the wear rate. The Al-Cu matrix composite had the best wear resistance, while the pure Al matrix composite showed the worst for the same Ti content. These differences or changes were attributed to the differences in materials' hardness or the strengthening effects of the Al3Ti platelets.

  15. First-principles study of the Al(001)-Al3Nb(001) interfacial properties

    Science.gov (United States)

    Ding, Yanhong; Xu, Rui

    2017-03-01

    The adhesion, interfacial energy and bonding on fcc-Al(001)/D022-Al3Nb(001) interface were investigated using density functional calculations. Considering different terminations of Al3Nb(001) (Al+Nb-terminated and Al-terminated) and stacking sites (top-, bridge- and center-sites), six Al(001)/Al3Nb(001) models were calculated. For the models with same stacking site, Al+Nb-terminated model has larger work of adhesion (Wad) than the Al-terminated one. For the models with same termination, the work of adhesion increases, and the interface energy decreases as the order of center-sited, bridge-sited and top-sited. Al+Nb-terminated-center-sited and Al-terminated-center-sited models are more stable among six models. The interfacial bonding was discussed with analysis of valence electron density distribution and partial density of states (PDOS). The bonding is mainly contributed from Al-Nb covalent bonds and Al-Al metallic interactions.

  16. Electrodeposition of Al from a 1-butylpyrrolidine-AlCl3 ionic liquid

    Directory of Open Access Journals (Sweden)

    Giridhar Pulletikurthi

    2015-12-01

    Full Text Available The addition of 1-butylpyrrolidine to AlCl3 results in the formation of an electrolyte that is suited to Al deposition. The feasibility of electrodepositing Al from the synthesized electrolyte was investigated. Several compositions of AlCl3 and 1-butylpyrrolidine were prepared for this purpose. These mixtures show a different phase behavior at various compositions of AlCl3 and 1-butylpyrrolidine. IR, Raman and NMR spectroscopy were employed to characterize the synthesized liquids. Among the prepared compositions, 1:1.2 mol ratio of 1-butylpyrrolidine:AlCl3 and the upper phase of 1:1.3 mol ratio of 1-butylpyrrolidine:AlCl3 were found to be suitable for Al electrodeposition at room temperature (RT. Uniform and thick (~µm thick layers of Al were obtained on copper at RT. Al deposition occured from the cationic species of AlCl3−xLy+ (where x≤2, y=1–2, and L=1-butylpyrrolidine in this electrolyte. This behavior is contrary to the well investigated classic AlCl3 based ionic liquids, where the deposition of Al occurs mainly from anionic Al2Cl7− ions.

  17. Groente- en fruitafvallen als veevoer : inventarisatie

    NARCIS (Netherlands)

    Vries, de A.

    1982-01-01

    Een onderzoek wat betreft hoeveelheden, bewaring, samenstelling, verteerbaarheid en eventueel aanwezige ongewenste stoffen van de bij- en afvalprodukten van groenten en fruit als veevoer voor herkauwers

  18. Effect of Excess Al in TiO2-Al Powder Mixture and Susceptor Material on Microwave Synthesis of TiAl/Al2O3 Composite

    Directory of Open Access Journals (Sweden)

    P. Radmehr

    2016-03-01

    Full Text Available In this research, TiAl/Al2O3 composite was synthesized from mechanically activated TiO2-Al powder mixtures using microwave heating.The initial powder mixtures were mechanically activated and pressed into cylindrical tablets and then heated in a microwave oven. The effect of different amounts of excess Al and microwave susceptor material (SiC or graphite on the ignition time and the resultant reaction products were evaluated. X-ray diffraction (XRD and scanning electron microscopy (SEM analysis were used for characterization of the synthesized samples. XRD patterns revealed that when there was no excess Al in the initial powder mixture, the main resulting intermetallic phase would be Ti3Al with negligible amounts of TiAl, while with 10 wt% excess Al, TiAl phase could be formed in the composite product.The results also showed that microwave synthesis took place faster and more reproducible when samples were packed in the graphite powder than when placed between two SiC blocks.

  19. Genetics of Familial and Sporadic ALS

    Science.gov (United States)

    2016-03-21

    Amyotrophic Lateral Sclerosis (ALS); Familial Amyotrophic Lateral Sclerosis; Amyotrophic Lateral Sclerosis With Frontotemporal Dementia; Lou Gehrig's Disease; Motor Neuron Disease; Primary Lateral Sclerosis

  20. Interfacial Phenomena in Al/Al, Al/Cu, and Cu/Cu Joints Soldered Using an Al-Zn Alloy with Ag or Cu Additions

    Science.gov (United States)

    Pstruś, Janusz; Gancarz, Tomasz

    2014-05-01

    The studies of soldered joints were carried out in systems: Al/solder/Al, Al/solder/Cu, Cu/solder/Cu, where the solder was (Al-Zn)EUT, (Al-Zn)EUT with 0.5, 1.0, and 1.5 at.% of Ag and (Al-Zn)EUT with 0.5, 1.0, and 1.5 at.% of Cu addition. Brazing was performed at 500 °C for 3 min. The EDS analysis indicated that the composition of the layers starting from the Cu pad was CuZn, Cu5Zn8, and CuZn4, respectively. Wetting tests were performed at 500 °C for 3, 8, 15, and 30 min, respectively. Thickness of the layers and their kinetics of growth were measured based on the SEM micrographs. The formation of interlayers was not observed from the side of Al pads. On the contrary, dissolution of the Al substrate and migration of Al-rich particles into the bulk of the solder were observed.

  1. Das Fähnchentestat als neue Prüfungsform im Fach Anatomie an der Ludwig-Maximilians-Universität München [Tag test as a particular kind of examination in the dissection course

    Directory of Open Access Journals (Sweden)

    Adamczyk, Christopher

    2007-08-01

    Full Text Available [english] Background: In view of the continuously increasing number of beginners of medical students at the Ludwig-Maximilians-University (LMU, the traditional kind of the practically oral tests on the cadaver for the assessment in tests of anatomy has become no longer reliably and practically realisable. Material and Methods: As an alternative was an exam-course established, where the students have to pass in turn different stations with preparations and to work on relating tasks. We investigated the practicability, reliability and the students' acceptance of this form of testing. Results: In 7 parallel prepaired exam-courses, 930 students can be testet within 155 minutes with time and effort of 2 academic teachers and 32 student co-workers. The results show an adequate selectivity high reliability and apropriate difficulty. Results of a written evaluation of 442 students (49% show a high acceptance of this kind of testing. Summary: This kind of test represents an alternative, which has to be taken seriously, to the traditional form of anatomical tests. [german] Hintergrund: Angesichts der stetig steigenden Zahl (WS 06/07 n=930 an Studienanfängern der Medizin in München ist im Fach Anatomie die traditionelle Prüfungsform der praktischen, mündlichen Prüfung am Präparat für die Bewertung in den Testaten nicht mehr zuverlässig und praktikabel durchführbar. Material & Methoden: Als Alternative wurde ein Prüfungsparcours etabliert, in dem die Studierenden der Reihe nach unterschiedliche Stationen mit ausgelegten Präparaten durchlaufen und entsprechende Aufgaben bearbeiten. Wir untersuchten die Praktikabilität, Zuverlässigkeit und studentische Akzeptanz des Prüfungsformates. Ergebnisse: Durch sieben parallel aufgebaute Prüfungsparcours können 930 Studierende in 155 Minuten mit einem Betreuungsaufwand von zwei akademischen und 32 studentischen Mitarbeitern geprüft werden. Die Ergebnisse zeigen eine adäquate Trennschärfe, hohe Zuverl

  2. Atomic structure and oxygen deficiency of the ultrathin aluminium oxide barrier in Al/AlOx/Al Josephson junctions.

    Science.gov (United States)

    Zeng, Lunjie; Tran, Dung Trung; Tai, Cheuk-Wai; Svensson, Gunnar; Olsson, Eva

    2016-07-12

    Al/AlOx/Al Josephson junctions are the building blocks of a wide range of superconducting quantum devices that are key elements for quantum computers, extremely sensitive magnetometers and radiation detectors. The properties of the junctions and the superconducting quantum devices are determined by the atomic structure of the tunnel barrier. The nanoscale dimension and disordered nature of the barrier oxide have been challenges for the direct experimental investigation of the atomic structure of the tunnel barrier. Here we show that the miniaturized dimension of the barrier and the interfacial interaction between crystalline Al and amorphous AlOx give rise to oxygen deficiency at the metal/oxide interfaces. In the interior of the barrier, the oxide resembles the atomic structure of bulk aluminium oxide. Atomic defects such as oxygen vacancies at the interfaces can be the origin of the two-level systems and contribute to decoherence and noise in superconducting quantum circuits.

  3. Atomic structure and oxygen deficiency of the ultrathin aluminium oxide barrier in Al/AlOx/Al Josephson junctions

    Science.gov (United States)

    Zeng, Lunjie; Tran, Dung Trung; Tai, Cheuk-Wai; Svensson, Gunnar; Olsson, Eva

    2016-07-01

    Al/AlOx/Al Josephson junctions are the building blocks of a wide range of superconducting quantum devices that are key elements for quantum computers, extremely sensitive magnetometers and radiation detectors. The properties of the junctions and the superconducting quantum devices are determined by the atomic structure of the tunnel barrier. The nanoscale dimension and disordered nature of the barrier oxide have been challenges for the direct experimental investigation of the atomic structure of the tunnel barrier. Here we show that the miniaturized dimension of the barrier and the interfacial interaction between crystalline Al and amorphous AlOx give rise to oxygen deficiency at the metal/oxide interfaces. In the interior of the barrier, the oxide resembles the atomic structure of bulk aluminium oxide. Atomic defects such as oxygen vacancies at the interfaces can be the origin of the two-level systems and contribute to decoherence and noise in superconducting quantum circuits.

  4. Respuesta inmune adaptativa al rotavirus

    Directory of Open Access Journals (Sweden)

    Manuel A. Franco

    2004-03-01

    Full Text Available

    El rotavirus (RV es un importante patógeno humano y el estudio de la respuesta inmune específica de éste en humanos, es un buen modelo para caracterizar la respuesta inmune de la mucosa intestinal (1. Nuestros estudios han tenido como objetivo la caracterización fenotípica y funcional de las células T y B específicas de RV con énfasis importante en la expresión de marcadores de migración intestinal. Estas células son estudiadas en muestras de sangre periférica de niños y adultos recientemente infectados con RV. Los análisis se hicieron por citometría de flujo y ELISPOT. Estudio de células T: los adultos sanos presentan bajas frecuencias circulantes tanto de LT CD4+, como de LT CD8+ específicos de RV que secretan INF_ .

    Significativamente mayores porcentajes de éstas células se detectaron en adultos sintomáticos infectados por RV. Sin embargo, las frecuencias de LT específicos de RV en todos los grupos de estudio fueron muy bajas comparadas con las observadas para otros patógenos.

    Sorprendentemente, en niños sintomáticos infectados por RV se detectaron bajas frecuencias de LT CD8+ circulantes específicos de RV secretando INF-g y muy pocos o ningún LT CD4+ secretando INF-g o LT CD4+ y CD8+ al secretar IL-13 o IL4 (2,3. Esto sugiere que el RV es un inductor relativamente pobre de células T de memoria secretando estas citoquinas. Los LT circulantes CD4+ , INF-g.+ específicos de RV presentes en adultos

  5. Influence of AlN thickness on AlGaN epilayer grown by MOCVD

    Science.gov (United States)

    Jayasakthi, M.; Juillaguet, S.; Peyre, H.; Konczewicz, L.; Baskar, K.; Contreras, S.

    2016-10-01

    AlGaN/AlN layers were grown by metalorganic chemical vapor deposition (MOCVD) on sapphire substrates. The AlN buffer thickness was varied from 400 nm to 800 nm. The AlGaN layer thickness was 1000 nm. The crystalline quality, thickness and composition of AlGaN were determined using high resolution X-ray diffraction (HRXRD). The threading dislocation density (TDD) was found to decrease with increase of AlN layer thickness. Reciprocal space mapping (RSM) was used to estimate the strain and relaxation between AlGaN and AlN. The optical properties of AlGaN layers were investigated by temperature dependent photoluminescence (PL). PL intensities of AlGaN layers increases with increasing the AlN thickness. The surface morphology of AlGaN was studied by atomic force microscopy (AFM). Root mean square (RMS) roughness values were found to be decreased while increase of AlN thickness.

  6. Kus on al-Zarqawi? / Aadu Hiietamm

    Index Scriptorium Estoniae

    Hiietamm, Aadu, 1954-

    2005-01-01

    Suurbritannia nädalalehe Sunday Times andmetel on Iraagi tagaotsituim mässaja, terrorivõrgustiku al Qaeda liitlane Abu-Musab al-Zarqawi pärast USA raketirünnakus haavatasaamist riigist põgenenud

  7. Al-Farabi dan Filsafat Kenabian

    Directory of Open Access Journals (Sweden)

    Qosim Nursheha Dzulhadi

    2014-03-01

    Full Text Available Artikel ini mengulas pemikiran al-Farabi tentang konsep kenabian dalam Islam. Masalah berawal dari adanya pemikiran yang menolak konsep kenabian pada umumnya dan kenabian Nabi Muhammad SAW khususnya. Sebagaimana yang dilontarkan oleh Muhammad Ahmad ibn al-Ruwandi. Ia mengatakan bahwa nabi sebenarnya tidak diperlukan manusia karena Tuhan telah mengaruniakan akal kepada manusia tanpa terkecuali. Dengan akal ini, manusia dapat mengetahui Tuhan beserta segala nikmat Nya dan dapat pula mengetahui perbuatan baik dan buruk, menerima suruhan dan larangan-Nya. Dengan demikian, nabi dengan segala fungsinya tidak diperlukan lagi. Bahkan, kitab suci pun tidak berguna untuk dibaca. Lebih berguna membaca buku filsafat Epicurus, Plato, Aristoteles, dan buku astronomi, logika, serta obat-obatan. Hal ini tentunya bertolak belakang dengan yang diajarkan dalam Islam. Beriman kepada nabi nabi merupakan hal inti dalam ajaran agama ini. Atas dasar itu al-Farabi bereaksi keras. Baginya, pandangan Ibn al-Ruwandi di atas tidak dapat dibenarkan, khususnya dari sisi akidah Islam. Sebagai al-Mu‘allim al-Tsani (Guru Kedua, karena prestasinya dalam menjelaskan dan mengulas-ulang filsafat Aristoteles, al-Farabi mengkritik secara sistematik pandangan menyimpang al-Ruwandi di atas.

  8. Diana Al-Hadid: Identity and Heritage

    Science.gov (United States)

    Jungerberg, Tom; Smith, Anna; Borsh, Colleen

    2012-01-01

    Diana Al-Hadid's sculptures reflect the many locations, cultures, histories, and mythologies that have shaped her as an artist. In large-scale works which have the appearance of architectural ruins, Al-Hadid employs imagery drawn from many diverse interests including science and technology, history, and literature. She also incorporates images and…

  9. The role of inclusions in ALS pathogenesis

    NARCIS (Netherlands)

    V. van Dis (Vera)

    2012-01-01

    textabstractAmyotrophic lateral sclerosis (ALS) is a devastating neurodegenerative disease that primarily afflicts motor neurons, leading to paralysis and death within 3 to 5 years after diagnosis. Genetic studies have uncovered multiple genetic defects causing familial forms of ALS and mutations oc

  10. Ceramic foams for Al-recycling

    Energy Technology Data Exchange (ETDEWEB)

    Luyten, J.; Vandermeulen, W.; Schutter, F. de [VITO, Materials Technology, Mol (Belgium); Simensen, C. [Sintef, Materials Technology, Blindern, Oslo (Norway); Ryckeboer, M. [Remi Claeys Aluminium, Lichtervelde (Belgium)

    2006-08-15

    The recycling of Al scrap requires an efficient purification step. In this investigation a filter technique is used to remove intermetallic compounds containing Fe, Mn and Si out of the molten Al. The paper describes the synthesis of the filters, the construction of the filter installation, and the results of the different filter tests. (Abstract Copyright [2006], Wiley Periodicals, Inc.)

  11. Konsepsi Ibnu Jarir Al-Tabari Tentang Al-Qur’an, Tafsir Dan Ta’wil

    Directory of Open Access Journals (Sweden)

    A.M Ismatulloh

    2012-12-01

    Full Text Available The objective of this research is to describe the concept of Ibnu Jarir al-Tabari about al-Qur’an, tafsir and ta’wil. Ibn Jarir al-Tabari is an outstanding expert in the classic Islamic tradition. His knowledge in hadits, fiqh, lughah, history, and tafseer is unquestionable. This study uses an analytical descriptive design. The findings show that: Firstly, in defining al-Qur’an, al-Tabari focused on the al-Qur’an as an Arabic language text, not in other language. Secondly, al-Qur’an is written in sab’ah ahruf. It means that there are 7 different kinds of language with the same meaning. Thirdly, al-Qur’an comes from seven heaven’s door. Fourthly, there is no different word between tafseer and ta’wil. They have same meaning. These concepts are different to other concepts proposed by other ulama.

  12. Kinetic Monte Carlo of transport processes in Al/AlOx/Au-layers: Impact of defects

    Directory of Open Access Journals (Sweden)

    Benedikt Weiler

    2016-09-01

    Full Text Available Ultrathin films of alumina were investigated by a compact kMC-model. Experimental jV-curves from Al/AlOx/Au-junctions with plasma- and thermal-grown AlOx were fitted by simulated ones. We found dominant defects at 2.3-2.5 eV below CBM for AlOx with an effective mass mox∗=0.35 m0 and a barrier EB,Al/AlOx≈2.8 eV in agreement with literature. The parameterization is extended to varying defect levels, defect densities, injection barriers, effective masses and the thickness of AlOx. Thus, dominant charge transport processes and implications on the relevance of defects are derived and AlOx parameters are specified which are detrimental for the operation of devices.

  13. Data supporting Al-Abed et al., Environ. Sci.: Nano, 2016,

    Data.gov (United States)

    U.S. Environmental Protection Agency — Data files representing each of the Figures and Tables published in Al-Abed et al., Environ. Sci.: Nano, 2016, 3, 593. The data file names identify the Figure or...

  14. Effect of Al coating conditions on laser weldability of Al coated steel sheet

    Institute of Scientific and Technical Information of China (English)

    Jung-Han LEE; Jong-Do KIM; Jin-Seok OH; Seo-Jeong PARK

    2009-01-01

    Al coated steel sheets with excellent heat resistance, thermal reflection, and corrosion resistance are widely used in various applications. The laser weldability of the Al coated steel sheet for full penetration welding was reported. The phenomenon caused by intermixed aluminum and behavior of aluminum in the weld were investigated. Al coated steel sheets that have various thickness and coating mass were prepared for laser welding. The effects of parameters such as welding conditions and Al coating conditions were investigated. Al content mixed in the weld after laser welding was evaluated, and then a correlation between the mixed Al and mechanical properties was investigated. The results show that the Al-rich zones which have Fe-Al intermetallic compounds are found in the weld. The intermetallic compounds cause the decreased strength of the weld.

  15. Wallada Bint al Mustakfi entre dos culturas

    OpenAIRE

    shreen Mahmoud Al Refai

    2013-01-01

    La princesa cordobesa Wallada Bint al Mustakfi bil-lah, hija del califa al Mustakfi Muhammad Ibn Abdel Rahman Ibn Obaidil-lah Ibn Al Nasir lidin Al-lah era una poetisa estimable, a quien los grandes poetas no podían superar. Era una mujer única, guapa y decente. Mantenía una relación sentimental con el  poeta y visir Ibn Zaydún. Dicha pasión, narrada por los poemas escritos por ambos amantes, se terminó por la separación debida a los celos, también de ambos;  al poeta le gustó la voz de una e...

  16. Thermoluminescence properties of AlN ceramics

    DEFF Research Database (Denmark)

    Trinkler, L.; Christensen, P.; Agersnap Larsen, N.

    1998-01-01

    The paper describes thermoluminescence (TL) properties of AlN:Y2O3 ceramics irradiated with ionising radiation. A high TL sensitivity of AlN:Y2O3 ceramics to radiation encouraged a study of the AlN ceramics for application as a dosimetric material. The paper presents experimental data on: glow...... curve, emission spectrum, dose response, energy dependence, influence of heating rate and fading rate. The measured TL characteristics were compared with those of well-known, widely used TLDs, i.e. LiF:Mg,Ti, LiF:Mg,Cu,P and Al2O3:C. It is concluded that AlN:Y2O3 ceramics showing a radiation sensitivity...

  17. The neuropathology of FTD associated With ALS.

    Science.gov (United States)

    Mackenzie, Ian R A

    2007-01-01

    There is increasing recognition of a clinical overlap between frontotemporal dementia (FTD) and amyotrophic lateral sclerosis (ALS). Recent advances in our understanding of the neuropathologic, biochemical, and genetic basis of these conditions provides evidence for a common underlying pathogenesis. The neuropathology in most cases of FTD with ALS is a subtype of frontotemporal lobar degeneration, characterized by neuronal inclusions that are immunoreactive for ubiquitin but not tau (frontotemporal lobar degeneration with ubiquitinated inclusions). These cases show significant pathologic overlap with clinically pure FTD and those with classic ALS. Moreover, the ubiquitinated pathologic protein in all these conditions has recently been identified as TDP-43. A number of families have been reported with autosomal dominant FTD-ALS linked to chromosome 9p and these also have TDP-43-positive frontotemporal lobar degeneration with ubiquitinated inclusions pathology. Together, these findings suggest that FTD-ALS is part of a clinicopathologic spectrum of disease, now identified as TDP-43 proteinopathies.

  18. NiAl alloys for structural uses

    Science.gov (United States)

    Koss, D. A.

    1991-01-01

    Alloys based on the intermetallic compound NiAl are of technological interest as high temperature structural alloys. These alloys possess a relatively low density, high melting temperature, good thermal conductivity, and (usually) good oxidation resistance. However, NiAl and NiAl-base alloys suffer from poor fracture resistance at low temperatures as well as inadequate creep strength at elevated temperatures. This research program explored macroalloying additions to NiAl-base alloys in order to identify possible alloying and processing routes which promote both low temperature fracture toughness and high temperature strength. Initial results from the study examined the additions of Fe, Co, and Hf on the microstructure, deformation, and fracture resistance of NiAl-based alloys. Of significance were the observations that the presence of the gamma-prime phase, based on Ni3Al, could enhance the fracture resistance if the gamma-prime were present as a continuous grain boundary film or 'necklace'; and the Ni-35Al-20Fe alloy was ductile in ribbon form despite a microstructure consisting solely of the B2 beta phase based on NiAl. The ductility inherent in the Ni-35Al-20Fe alloy was explored further in subsequent studies. Those results confirm the presence of ductility in the Ni-35Al-20Fe alloy after rapid cooling from 750 - 1000 C. However exposure at 550 C caused embrittlement; this was associated with an age-hardening reaction caused by the formation of Fe-rich precipitates. In contrast, to the Ni-35Al-20Fe alloy, exploratory research indicated that compositions in the range of Ni-35Al-12Fe retain the ordered B2 structure of NiAl, are ductile, and do not age-harden or embrittle after thermal exposure. Thus, our recent efforts have focused on the behavior of the Ni-35Al-12Fe alloy. A second parallel effort initiated in this program was to use an alternate processing technique, mechanical alloying, to improve the properties of NiAl-alloys. Mechanical alloying in the

  19. Stabilization of itinerant (band) magnetism in FeAl by Ga substitution for Al

    Energy Technology Data Exchange (ETDEWEB)

    Papaconstantopoulos, D. A.; Mazin, I. I.; Hathaway, K. B.

    2001-06-01

    Band structure calculations of FeGa{sub 1{minus}x}Al{sub x} have been performed, to further investigate the stability of ferromagnetism in FeAl. The Stoner parameter increases by about 20% at the FeGa end. This is also confirmed by our spin-polarized calculations. We conclude that Ga substitution for Al is likely to stabilize the elusive (or illusive) ferromagnetic state in FeAl. {copyright} 2001 American Institute of Physics.

  20. XAFS Study of the Al K-Edge in NaAlH4

    NARCIS (Netherlands)

    Balde, C.P.; Mijovilovich, A.E.; Koningsberger, D.C.; van der Eerden, A.M.J.; Smith, A.D.; de Jong, K.P.; Bitter, J.H.

    2007-01-01

    Al K-edge (1561.1 eV) XANES and EXAFS spectra of unoxidized NaAlH4, a hydrogen storage material, have been recorded in He atmosphere in a special in situ low-energy cell. The XANES spectrum of NaAlH4 is reported and compared to that of oxidized NaAlH4, thus illustrating the power of XANES spectrosco

  1. Memes als moderne Bildungsmedien: Humor als Medium pädagogischer Interaktion zur Wissenskonstruktion im Physikunterricht

    OpenAIRE

    Prescher, Thomas; Thees, Michael

    2015-01-01

    Memes stellen ein modernes Bildmedium dar. Im Beitrag wird die Frage verfolgt, ob Memes mit ihrem inhärenten Humor innerhalb des Unterrichts auch als Bildungsmedium dienen und didaktisch genutzt werden können. Dazu wird Humor als generalisiertes Kommunikationsmedium pädagogischer Interaktion beschrieben, um Memes als moderne Bildmedien - in ihrer Wirkung als humorvolle Form der affektiven und kognitiven Inkongruenzstiftung - zur Entwicklung von Fachkonzepten im Physikunterricht fassen zu könn...

  2. Corrosion Studies of 2195 Al-Li Alloy and 2219 Al Alloy with Differing Surface Treatments

    Science.gov (United States)

    Danford, M. D.; Mendrek, M. J.

    1998-01-01

    Corrosion studies of 2195 Al-Li and 2219 Al alloys have been conducted using the scanning reference electrode technique (SRET) and the polarization resistance (PR) technique. The SRET was used to study corrosion mechanisms, while corrosion rate measurements were studied with the PR technique. Plates of Al203 blasted, soda blasted and conversion coated 2219 Al were coated with Deft primer and the corrosion rates studied with the EIS technique. Results from all of these studies are presented.

  3. High temperature creep behaviour of Al-rich Ti-Al alloys

    Science.gov (United States)

    Sturm, D.; Heilmaier, M.; Saage, H.; Aguilar, J.; Schmitz, G. J.; Drevermann, A.; Palm, M.; Stein, F.; Engberding, N.; Kelm, K.; Irsen, S.

    2010-07-01

    Compared to Ti-rich γ-TiAl-based alloys Al-rich Ti-Al alloys offer an additional reduction of in density and a better oxidation resistance which are both due to the increased Al content. Polycrystalline material was manufactured by centrifugal casting. Microstructural characterization was carried out employing light-optical, scanning and transmission electron microscopy and XRD analyses. The high temperature creep of two binary alloys, namely Al60Ti40 and Al62Ti38 was comparatively assessed with compression tests at constant true stress in a temperature range between 1173 and 1323 K in air. The alloys were tested in the cast condition (containing various amounts of the metastable phases Al5Ti3 and h-Al2Ti) and after annealing at 1223 K for 200 h which produced (thermodynamically stable) lamellar γ-TiAl + r-Al2Ti microstructures. In general, already the as-cast alloys exhibit a reasonable creep resistance at 1173 K. Compared with Al60Ti40, both, the as-cast and the annealed Al62Ti38 alloy exhibit better creep resistance up to 1323 K which can be rationalized by the reduced lamella spacing. The assessment of creep tests conducted at identical stress levels and varying temperatures yielded apparent activation energies for creep of Q = 430 kJ/mol for the annealed Al60Ti40 alloy and of Q = 383 kJ/mol for the annealed Al62Ti38 material. The latter coincides well with that of Al diffusion in γ-TiAl, whereas the former can be rationalized by the instability of the microstructure containing metastable phases.

  4. Dakwah Kultural Bayt al-Qur’an al-Akbar Ukiran Kayu Khas Melayu Palembang

    Directory of Open Access Journals (Sweden)

    Reza Pahlevi

    2016-07-01

    Full Text Available Penelitian ini berusaha mengungkap berbagai fenomena yang menggambarkan serangkaian kegiatan dakwah kultural Bayt al-Qur’an al-Akbar Ukiran Khas Melayu Palembang. Sehingga dapat diperoleh sejumlah informasi mengenai berbagai upaya penerapan program yang dimaksud. Penelitian ini dapat disimpulkan, pertama kontribusi Bayt al-Qur’an al-Akbar Ukiran Khas Melayu Palembang terhadap perkembangan metode dakwah kultural adalah dakwah melalui seni. Kedua, Bayt al-Qur’an al-Akbar Ukiran Khas Melayu Palembang sebagai tempat Wisata Religi yang sangat signifikan.   This research tries to reveal the various phenomenon that describe a series of cultural propaganda activities Bayt al-Qur’an al-Akbar Ukiran Khas Melayu Palembang. In order to obtain some informations about the efforts of the implementation of the program in question. It can be concluded, the first contribution of Bayt al-Qur’an al-Akbar Ukiran Khas Melayu Palembang on the development of methods of cultural propaganda is propaganda through art. Second Bayt al-Qur’an al-Akbar Ukiran Khas Melayu Palembang as a very significant Religious Tourism.

  5. Interne Kommunikation in der Wahrnehmung von Mitarbeitern : Ergebnisse einer Befragung

    OpenAIRE

    2009-01-01

    Die interne Kommunikation ist eines der zentralen Felder der Organisations- oder Unternehmenskommunikation. In der Praxis professionalisiert sie sich zusehends: Was früher von PR-Fachleuten als Allroundern der Organisationskommunikation mit abgedeckt wurde, ist heute in immer mehr Organisationen eine eigenständige Teilfunktion der Kommunikation. Abteilungen für interne Kommunikation existieren nicht mehr länger nur in Großunternehmen, sondern zunehmend auch in mittelständischen Unternehmen, ...

  6. Japanese version of the ALS-FTD-Questionnaire (ALS-FTD-Q-J).

    Science.gov (United States)

    Watanabe, Yasuhiro; Beeldman, Emma; Raaphorst, Joost; Izumi, Yuishin; Yoshino, Hiide; Masuda, Michihito; Atsuta, Naoki; Ito, Satoru; Adachi, Tadashi; Adachi, Yoshiki; Yokota, Osamu; Oda, Masaya; Hanashima, Ritsuko; Ogino, Mieko; Ichikawa, Hiroo; Hasegawa, Kazuko; Kimura, Hideki; Shimizu, Toshio; Aiba, Ikuko; Yabe, Hayato; Kanba, Makoto; Kusumi, Kimiyoshi; Aoki, Tetsuya; Hiroe, Yu; Watanabe, Hirohisa; Nishiyama, Kazutoshi; Nomoto, Masahiro; Sobue, Gen; Nakashima, Kenji

    2016-08-15

    Amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD) share common clinical, genetic and neuropathological features. Some ALS patients have behavioral/personality changes, which could result in significant obstacles in the care provided by family members and caregivers. An easy screening tool would contribute greatly to the evaluation of these symptoms. We translated the ALS-FTD-Questionnaire, developed in the Netherlands, into Japanese (ALS-FTD-Q-J) and examined the clinimetric properties (internal consistency, construct and clinical validity). Patients with ALS and/or behavioral variant FTD (bvFTD) were evaluated alongside healthy controls in this multicenter study. All ALS patients, regardless of bvFTD status, were further evaluated by the frontal behavioral inventory (FBI) and for frontal/executive function, cognition, anxiety/depression, and motor functions. Data from 146 subjects were analyzed: ALS (92), ALS-bvFTD (6), bvFTD (16), and healthy controls (32). The internal consistency of the ALS-FTD-Q-J was good (Cronbach α=0.92). The ALS-FTD-Q-J showed construct validity as it exhibited a high correlation with the FBI (r=0.79). However, correlations were moderate with anxiety/depression and low with cognitive scales, in contrast to the original report, i.e. a moderate correlation with cognition and a low correlation with anxiety/depression. The ALS-FTD-Q-J discriminated ALS patients from (ALS-)bvFTD patients and controls. Thus, the ALS-FTD-Q-J is useful for evaluating Japanese ALS/FTD patients.

  7. WAHDAT AL WUJUD DALAM PEMIKIRAN IBNU ARABI

    Directory of Open Access Journals (Sweden)

    Abd Halim Rofi'ie

    2013-09-01

    Full Text Available Ibnu Arabi, the Grand Master of Islam, is a great thinker whose controversial thought, wahdat al-wujud, has significantly influenced the mystiques of Islam. The meaning of wahdat al-wujud is basically two folds, i.e. that Being is the only One which exists and that the universe is merely a manifestation of the One. The One Being here refers to Allah SWT. The One covers up all the existing phenomena and functions as a resource which emanates the entire universe. In this context, He is referred to as al-Haqiqat al-Muhammadiyah. He might also be viewed as both the Universal Soul for His being the source of cosmos that governs the universe and the Universal Body for His reflecting any actions on every single micro existence that forms the universe. Furthermore, when His existence is deemed as a jauhar (jewel that face-up any occurrences, He is typically known as al-haba’. The concept of wahdat al-wujud can actually be simplified into the principle of laa maujuda illa wujud al-wahid (no existence except the Existing One, the Being. The One might reveal His own existence into different martabat or levels: Martabat Ahadiyah, Martabat Wahidiyah, and Martabat Tajalli Syuhudi. Those standing points trigger Ibnu Arabi to believe that any kinds of realities or existences are nothing but a true reflection of the One.

  8. Thermal diffusion in Ni/Al multilayer

    Energy Technology Data Exchange (ETDEWEB)

    Swain, M.; Bhattacharya, D.; Singh, S.; Basu, S. [Solid State Physics Division, Bhabha Atomic Research Center, Mumbai 400085 (India); Gupta, M. [UGC-DAE-Consortium for Scientific Research, University Campus, Khandwa Road, Indore 452017 (India)

    2013-02-05

    Two Ni/Al multilayers deposited by ion beam sputtering of nominal design [Ni(200A)/Al(100A)] Multiplication-Sign 5 and [Ni(50A)/Al(227A)] Multiplication-Sign 5 on Si substrates were annealed at 200 Degree-Sign C. As-deposited and annealed samples were characterized by x-ray diffraction (XRD) and x-ray reflectometry (XRR). The effort was to study the path of alloying in the above two multilayers of same elements but of opposite stoichiometric ratio. We find distinct differences in alloying of these samples.

  9. Juan Goytisolo en al aule de ELE

    OpenAIRE

    Zubia Fernandez, Daniel

    2004-01-01

    Al integrar en el aula de ELE artículos periodísticos sobre un determinado escritor como una práctica de expresión oral y escrita, se aproxima al alumno principiante de ELE al universo literario del autor escogido con el propósito de entrelazar la enseñanza de la lengua y la de la(s) literatura(s) en lengua española. Con este enfoque se estimula la capacidad lectora del alumno en la lengua meta ya que los textos periodísticos constituyen modelos ejemplares para este propósito d...

  10. Characterization of different-Al-content AlGaN/GaN heterostructures on sapphire

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    Al x Ga 1-x N/GaN high-electron-mobility transistor (HEMT) structures with Al composition ranging from x = 0.13 to 0.36 are grown on sapphire substrates by low-pressure metalorganic chemical vapor deposition (LP-MOCVD). The effects of Al content on crystal quality, surface morphology, optical and electrical characteristics of the AlGaN/GaN heterostructures have been analyzed. Although high Al-content (36%) heterostructure exhibits a distinguished photoluminescence peak related to recombination between the two-dimensional electron gas and photoexcited holes (2DEG-h), its crystal quality and rough surface morphology are poor. 2DEG mobility increases with the Al content up to 26% and then it apparently decreases for high Al-content (36%) AlGaN/GaN heterostructure. The increase of sheet carrier density with the increase of Al content has been observed. A high mobility at room temperature of 2105 cm 2 /V s with a sheet carrier density of n s = 1.10 × 10 13 cm -2 , for a 26% Al-content AlGaN/GaN heterostructure has been obtained, which is approaching state-of-the-art for HEMT grown on SiC. Sheet resistance as low as 274 Ω/□ has also been achieved.

  11. Tracing Al Shabaab’s Decision to Cooperate with Al Qaeda in Somalia (2008

    Directory of Open Access Journals (Sweden)

    Adlini Ilma Ghaisany Sjah

    2014-02-01

    Full Text Available 'Al Shabaab, a Somali insurgent with predominantly nationalistic causes (alongside transnational [global Jihad] and Islamic goals made the choice to fight on behalf of Al Qaeda in 2008. The decision to do so contrasted with Al Shabaab’s previous behaviour of actively denying cooperation and distancing itself from Al Qaeda. This study aims to uncover factors that contributed to Al Shabaab’s decision through the use of process-tracing. The results show that Al Shabaab’s declaration of cooperation with Al Qaeda in August 2008 was brought about by a series of events that traced back to four factors: public reactions to the implementation of a Salafi ideology, the shift to a radical leadership, Al Shabaab’s inability to maintain stability in areas under its control and its increasing attacks by Al Shabaab on the Somali public. Al Shabaab pursued cooperation with Al Qaeda after realizing that their nationalistic preference was no longer achievable in the near future.' ' '

  12. InAlN/AlN/GaN heterostructures for high electron mobility transistors

    Science.gov (United States)

    Usov, S. O.; Sakharov, A. V.; Tsatsulnikov, A. F.; Lundin, V. W.; Zavarin, E. E.; Nikolaev, A. E.; Yagovkina, M. A.; Zemlyakov, V. E.; Egorkin, V. I.; Ustinov, V. M.

    2016-08-01

    The results of development of InAlN/AlN/GaN heterostructures, grown on sapphire substrates by metal-organic chemical vapour deposition, and high electron mobility transistors (HEMTs) based on them are presented. The dependencies of the InAlN/AlN/GaN heterostructure properties on epitaxial growth conditions were investigated. The optimal indium content and InAlN barrier layer thicknesses of the heterostructures for HEMT s were determined. The possibility to improve the characteristics of HEMTs by in-situ passivation by Si3N4 thin protective layer deposited in the same epitaxial process was demonstrated. The InAlN/AlN/GaN heterostructure grown on sapphire substrate with diameter of 100 mm were obtained with sufficiently uniform distribution of sheet resistance. The HEMTs with saturation current of 1600 mA/mm and transconductance of 230 mS/mm are demonstrated.

  13. Preparation and Mechanical Properties of Al2O3/Al Laminated Ceramic Matrix Composites

    Institute of Scientific and Technical Information of China (English)

    HUANG Kangming; LI Weixin; XIE Binhuan; RAO Pinggen; PENG Cheng; CHEN Dabo; WU Jianqing

    2011-01-01

    Three series of Al2O3/Al laminated ceramic matrix composites,named SPA,SPV and HP,were fabricated by different methods.SPA and SPV were prepared using Al2O3 slices and Al slurry via screen printing and subsequent heat treatment in air or vacuum.HP samples were made by hot pressing the layered stack of Al foils and Al2O3 slices.SEM and XRD were applied to analyze the microstructure and the interlayer crystal phase.The bending strength,fracture toughness and fracture work of the samples made by the three methods were measured and compared.The results show that the composites have much better toughness and higher fracture work than the Al2O3 slice.Among the samples made by the three methods,the samples made by hot pressing have the optimum mechanical performance.The displacement-load curves and fracture mechanism were analyzed.

  14. The Y-Ag-Al system

    Energy Technology Data Exchange (ETDEWEB)

    Gumenyuk, T.M.; Kuz' ma, Yu.B.; Stel' makhovych, B.M. [L' vov State Univ. (Ukraine). Dept. of Anal. Chem.

    2000-03-14

    The interaction between the components in the Y-Ag-Al system at 870 K has been studied using X-ray analysis. The phase diagram in the region up to 50 at.% of yttrium has been constructed. The limits of the solid solution regions of the binary compounds and the homogeneity ranges of the ternary ones have been determined. The crystal structures of the ternary aluminides Y{sub 3}Ag{sub 2}Al{sub 7} (Ca{sub 3}Cu{sub 2}Al--type structure, space group R anti 3m, a=0.55422(2), c=2.6259(1) nm) and YAg{sub 0.6}Al{sub 1.4} (KHg{sub 2}-type structure, space group Imma, a=0.45399(2), b=0.71551(3), c=0.78712(4) nm) have been studied for the first time. (orig.)

  15. Calcium platinum aluminium, CaPtAl

    Directory of Open Access Journals (Sweden)

    Charles Fon Abi

    2011-10-01

    Full Text Available A preliminary X-ray study of CaPtAl has been reported previously by Hulliger [J. Alloys Compd (1993, 196, 225–228] based on X-ray powder diffraction data without structure refinement. With the present single-crystal X-ray study, we confirm the assignment of the TiNiSi type for CaPtAl, in a fully ordered inverse structure. All three atoms of the asymmetric unit have .m. site symmetry. The structure features a ∞3[AlPt] open framework with a fourfold coordination of Pt by Al atoms and vice versa. The Ca atoms are located in the large channels of the structure.

  16. 78 FR 4967 - Alabama Disaster #AL-00046

    Science.gov (United States)

    2013-01-23

    ... From the Federal Register Online via the Government Publishing Office SMALL BUSINESS ADMINISTRATION Alabama Disaster AL-00046 AGENCY: U.S. Small Business Administration. ACTION: Notice. SUMMARY... adversely affected by the disaster: Primary Counties: Mobile; Pike. Contiguous Counties: Alabama:...

  17. Smoking Tied to Shorter Survival with ALS

    Science.gov (United States)

    ... page: https://medlineplus.gov/news/fullstory_161094.html Smoking Tied to Shorter Survival With ALS Tobacco use ... 22, 2016 WEDNESDAY, Sept. 21, 2016 (HealthDay News) -- Smoking may speed progression of Lou Gehrig's disease and ...

  18. Thermal Conductivity of Al-Salt Composites

    Science.gov (United States)

    Li, Peng; Zhang, Mei; Wang, Lijun; Seetharaman, Seshadri

    2015-11-01

    With a view to examine the possibility of estimating the content of entrapped metallic aluminium in the salt cake from aluminium remelting, the thermal diffusivity of reference composites of KCl-NaCl-Al was measured as a function of aluminium metal content at room temperature. The thermal conductivity of the reference composites was found to increase with the metallic Al content. The lumped parameter model approach was carried out to discuss the influence of different geometry arrangements of each phase, viz. air, salts and metallic aluminium on the thermal conductivity. Application of the present results to industrial samples indicates that factors such as the interfacial condition of metallic Al particles have to be considered in order to estimate the amount of entrapped Al in the salt cake.

  19. Are RENiAl hydrides metallic?

    Energy Technology Data Exchange (ETDEWEB)

    Eichinger, Karl; Havela, Ladislav; Prokleska, Jan; Stelmakhovych, Olha; Danis, Stanislav [Faculty of Mathematics and Physics, Charles Univ., Prague (Czech Republic); Santava, Eva [Inst. of Physics ASCR, Prague (Czech Republic); Miliyanchuk, Khrystyna [Dept. of Inorganic Chemistry, Ivan Franko National Univ. of Lviv (Ukraine)

    2009-09-15

    Due to hydrogenation, the crystal structure of GdNiAl distorts from hexagonal to orthorhombic. The magnetic ordering temperature decreases dramatically and the magnetic entropy of this phase transition is in good agreement with theory. LuNiAl does not change its structure type, but it was found that the electronic contribution to specific heat decreases dramatically. None of the two phases loses its metallic character. (orig.)

  20. L’impegno al tempo della globalizzazione

    DEFF Research Database (Denmark)

    Cecchini, Leonardo

    al dibattito sui rapporti (di reciproca esclusione? complementarità?) tra postmoderno e impegno e sul carattere di quest’ultimo oggi (politico? sociale? etico? ecologico? altro?). Prendendo le mosse dalle discussioni suscitate dalla presa di posizione teorica dei Wu Ming, nel mio intervento vorrei...... Romanistica», 8/2011, pgg. 129-143. Wu Ming, New Italian Epic. Letteratura, sguardo oblique, ritorno al futuro, Torino, Einaudi, 2009....

  1. Del latín al rumano

    Directory of Open Access Journals (Sweden)

    Montes Giraldo José Joaquín

    2003-06-01

    Full Text Available

    Marius Sala, Del latín al rumano. Versión española de Valeria Neagu, París, Unión Latina - Bucarest, Univers enciclopedic, 2002. El texto se dirige al lector corriente, no especialista, y por eso el aparato técnico-bibliográfico no se presenta en el curso de la exposición.

  2. Hypermetabolism as a Risk Factor for ALS

    Science.gov (United States)

    2012-07-01

    hypermetabolism related to loss of TDP-43, an essential RNA binding protein implicated in ALS and Frontotemporal dementia ( FTD ), may contribute to disease...with Paget’s disease of bone and FTD (IBMPFD), it will also be interesting to test whether hypermetabolism may also be a risk factor in these...mouse strain confers leanness and protects from diet-induced obesity. Nat Genet 40(11):1354-1359, 2008. 3. Stone S, et al: TBC1D1 is a candidate

  3. Line shape diagnostics of Galactic 26Al

    CERN Document Server

    Kretschmer, K; Hartmann, D H

    2003-01-01

    The shape of the gamma-ray line from radioactive 26Al, at 1808.7 keV energy in the frame of the decaying isotope, is determined by its kinematics when it decays, typically 10^6 y after its ejection into the interstellar medium from its nucleosynthesis source. Three measurements of the line width exist: HEAO-C's 1982 value of (0+3) keV FWHM, the GRIS 1996 value of (5.4 +/- 1.3) keV FWHM, and the recent RHESSI value of (2.0 +/- 0.8) keV FWHM, suggesting either "cold", "hot", or "warm" 26Al in the ISM. We model the line width as expected from Galactic rotation, expanding supernova ejecta, and/or Wolf-Rayet winds, and predict a value below 1 keV (FWHM) with plausible assumptions about 26Al initial velocities and expansion history. Even though the recent RHESSI measurement reduces the need to explain a broad line corresponding to 540 km/s mean 26Al velocity through extreme assumptions about grain transport of 26Al or huge interstellar cavities, our results suggest that standard 26Al ejection models produce a line ...

  4. In Situ Fabrication of AlN Coating by Reactive Plasma Spraying of Al/AlN Powder

    Directory of Open Access Journals (Sweden)

    Mohammed Shahien

    2011-10-01

    Full Text Available Reactive plasma spraying is a promising technology for the in situ formation of aluminum nitride (AlN coatings. Recently, it became possible to fabricate cubic-AlN-(c-AlN based coatings through reactive plasma spraying of Al powder in an ambient atmosphere. However, it was difficult to fabricate a coating with high AlN content and suitable thickness due to the coalescence of the Al particles. In this study, the influence of using AlN additive (h-AlN to increase the AlN content of the coating and improve the reaction process was investigated. The simple mixing of Al and AlN powders was not suitable for fabricating AlN coatings through reactive plasma spraying. However, it was possible to prepare a homogenously mixed, agglomerated and dispersed Al/AlN mixture (which enabled in-flight interaction between the powder and the surrounding plasma by wet-mixing in a planetary mill. Increasing the AlN content in the mixture prevented coalescence and increased the nitride content gradually. Using 30 to 40 wt% AlN was sufficient to fabricate a thick (more than 200 µm AlN coating with high hardness (approximately 1000 Hv. The AlN additive prevented the coalescence of Al metal and enhanced post-deposition nitriding through N2 plasma irradiation by allowing the nitriding species in the plasma to impinge on a larger Al surface area. Using AlN as a feedstock additive was found to be a suitable method for fabricating AlN coatings by reactive plasma spraying. Moreover, the fabricated coatings consist of hexagonal (h-AlN, c-AlN (rock-salt and zinc-blend phases and certain oxides: aluminum oxynitride (Al5O6N, cubic sphalerite Al23O27N5 (ALON and Al2O3. The zinc-blend c-AlN and ALON phases were attributed to the transformation of the h-AlN feedstock during the reactive plasma spraying. Thus, the zinc-blend c-Al

  5. Corrosion behavior of solid solution (Ti,Al)N as a function of Al concentration

    Energy Technology Data Exchange (ETDEWEB)

    Larijani, M.M.; Seyedi, H. [Nuclear Science and Technology Research Institute, P. O. Box 31485-498, Karaj (Iran, Islamic Republic of); Manouchehrian, M. [Department of Physics, Science Faculty, South Tehran Branch, Islamic Azad University, Tehran (Iran, Islamic Republic of); Yari, M. [Engineering Department Materials, Science and Research Branch, Islamic Azad University, Tehran (Iran, Islamic Republic of)

    2012-08-15

    In this work, a series of (Ti, Al) N coatings with different Al contents were deposited on 304 stainless steel substrates by Hollow Cathode Discharge (HCD) method. The coatings were grown on 304 stainless steel substrates at 400 C. The coatings were characterized using energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), atomic force microscopy (AFM), and microhardness test. The XRD confirmed the transition from TiN phase to (Ti, Al) N phase and then to AlN phase with increasing Al concentration in the solid solution. It was found that with increasing Al concentration the hardness of the coatings initially increased up to a maximum value of about 30 GPa at around 32 at.% of Al and then the coating hardness decreased rapidly with further increase of Al content (Al > 32 at.%). The potentiodynamic polarization analysis was carried out in 3.5 wt.% NaCl solutions to study the corrosion resistance of the coatings. From the corrosion test it can be inferred that the amount of Al atoms in the coatings plays an important role for reducing the corrosion. (Copyright copyright 2012 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

  6. Thermodynamics and surface properties of liquid Al-Ga and Al-Ge alloys

    Energy Technology Data Exchange (ETDEWEB)

    Anusionwu, B.C. [Abdus Salam Int. Centre for Theoretical Physics, Trieste (Italy); Federal University of Technology, Department of Physics, Owerri (Nigeria); Adebayo, G.A. [Abdus Salam Int. Centre for Theoretical Physics, Trieste (Italy); University of Agriculture, Department of Physics, Abeokuta (Nigeria); Madu, C.A. [Federal University of Technology, Department of Physics, Owerri (Nigeria)

    2009-11-15

    The surface properties of Al-Ga and Al-Ge liquid alloys have been theoretically investigated at a temperature of 1100 K and 1220 K respectively. For the Al-Ga system, the quasi chemical model for regular alloy and a model for phase segregating alloy systems were applied, while for the Al-Ge system the quasi chemical model for regular and compound forming binary alloys were applied. In the case of Al-Ga, the models for the regular alloys and that for the phase segregating alloys produced the same value of order energy and same values of thermodynamic and surface properties, while for the Al-Ge system, the model for the regular alloy reproduced better the thermodynamic properties of the alloy. The model for the compound forming systems showed a qualitative trend with the measured values of the thermodynamic properties of the Al-Ge alloy and suggests the presence of a weak complex of the form Al{sub 2}Ge{sub 3}. The surface concentrations for the alloys show that Ga manifests some level of surface segregation in Al-Ga liquid alloy while the surface concentration of Ge in Al-Ge liquid alloy showed a near Roultian behavior below 0.8 atomic fraction of Ge. (orig.)

  7. Thermodynamics and surface properties of liquid Al-Ga and Al-Ge alloys

    Science.gov (United States)

    Anusionwu, B. C.; Adebayo, G. A.; Madu, C. A.

    2009-11-01

    The surface properties of Al-Ga and Al-Ge liquid alloys have been theoretically investigated at a temperature of 1100 K and 1220 K respectively. For the Al-Ga system, the quasi chemical model for regular alloy and a model for phase segregating alloy systems were applied, while for the Al-Ge system the quasi chemical model for regular and compound forming binary alloys were applied. In the case of Al-Ga, the models for the regular alloys and that for the phase segregating alloys produced the same value of order energy and same values of thermodynamic and surface properties, while for the Al-Ge system, the model for the regular alloy reproduced better the thermodynamic properties of the alloy. The model for the compound forming systems showed a qualitative trend with the measured values of the thermodynamic properties of the Al-Ge alloy and suggests the presence of a weak complex of the form Al2Ge3. The surface concentrations for the alloys show that Ga manifests some level of surface segregation in Al-Ga liquid alloy while the surface concentration of Ge in Al-Ge liquid alloy showed a near Roultian behavior below 0.8 atomic fraction of Ge.

  8. Heterogeneous nucleation of solid Al from the melt by Al 3 Ti : Molecular dynamics simulations

    KAUST Repository

    Wang, Junsheng

    2010-10-27

    It has been known experimentally for some time that Al3 Ti is a powerful nucleant for the solidification of aluminum from the melt; however, a full microscopic understanding is still lacking. To develop this understanding, we have performed molecular dynamics simulations of the nucleation and early stages of growth using published embedded atom method potentials for Al-Ti, but modified by us to stabilize the D 022 structure. We discover that Al3 Ti can indeed be very effective in promoting the growth of solid Al but the manner in which growth takes place depends sensitively on the surface on which the Al nucleates. In particular, complete growth of solid Al from the liquid on the (001) and (110) surfaces of Al3 Ti occurs at a lower temperature than on the (112) surface. This anisotropy agrees with observations in previous experiments. We explain this observation in terms of interfacial energies. On the preferential (111) surface of Al the solid-liquid interfacial energy is highest while the solid-vacuum energy is lowest. Our simulations also show that the extent of ordering taking place in liquid Al close to the Al 3 Ti substrate above the melting point correlates well with the effectiveness of the substrate as a nucleant below the melting temperature: this could provide a computationally efficient scheme to identify good nucleants. © 2010 The American Physical Society.

  9. Al4C3 Hydration Thermochemical Analysis for Burned Carbon-containing Refractories with Al

    Institute of Scientific and Technical Information of China (English)

    YANG Ding'ao; YU Zhiming; FAN Liuwu

    2003-01-01

    In this paper, X-ray diffractogram analysis and SEM observation of Al4 C3 formed at high temperature from carbon-containing refractories with Al have been carried out.Aluminum added to carbon-containing refractories reacts with C(s)to form Al4 C3(s) gradually during heating from 600 ℃ to 1200℃.It is considered that the interlocked structure of Al4 C3 plate crystals promotes the outstanding increase of hot modulus of rupture of carbon-containing refractories with Al. The HMOR of carbon-containing refractories added with Al additive from 0 to 5wt% increases by 2.8 times being from 6.5MPa to 18.2MPa.After a thermochemical calculation for hydration reaction processes of Al4 C3 and H2O(g), the equilibrium partial pressure chart of H2O(g)in H2O-Al4C3-Al(OH)3 system vs various temperatures has been attained . The H2O (g) partial pressure in the air needed for the Al4 C3 hydration reaction is no more than 10~18 atm at the temperature below 120℃.It is considered that the burned carbon-containing refractories with Al is extremely easy to hydrate and the cracking of burned carbon-containing refractories is generated because that the hydration expansion is 2.11 times during transforming from Al4 C3 to Al(OH)3.The fundamental measure against hydration of the refractories is to insulate the refractories from H2O(g)by various means such as pitch impregnation or other sealing materials.

  10. Prinsip Pendidikan Karakter dalam Islam: Studi Komparasi Pemikiran Al-Ghazali dan Burhanuddin Al-Zarnuji

    Directory of Open Access Journals (Sweden)

    Agus Setiawan

    2014-06-01

    Full Text Available The impelemtantion of character education that is done by the Indonesian government recently has been provoked by al-Ghazali and Burhanuddin al-Zarnuji long ago. It was proven by some written thoughts of al-Ghazali and Burhanuddin al-Zarnuji. They were very famous scientists in their era and widely welknown as educational experts who produced some phenomenal thoughts many people use today. Al-Ghazali and Burhanuddin al-Zarnuji lived in the era of Bani Abbasiyah monarchy, but Both of them lived in different era. Al-Ghazali was born first, then Burhanuddin al-Zarnuji. They had different mazhab, al-Ghazali went to the traditional principle of mazhab Syafi’I and Burhanuddin al-Zarnuji went to the modern principle of mazhab Hanafi. The differences, of course, would create a different thought. Still, they might have a similar principle of Islamic character education. The thoughts of character education of al-Ghazali have been poured in the “Ayyuha Walad” focusing to the students’ character building characterized by religiously obedient, skillfull of general and religious knowledge, socially helpful, affectionate, generous, good citizen, and coloring the society. Some applicable thoughts of character education of Ayyuha al-Walad of al-Gazhali to the contemporary education are: the balance of the happiness purposes of the recent life and the life after death, qana’ah and tawakal, affectionate, caring other, patience, honesty, philanthrophy, social works, generousity, democratic, peace makers, and patriotic. Those characters are also directed in the islamic character education nowdays. So that, the thoughts of al-Ghazali positively and responsively are absorbed by the Indonesian government to build the national character widely implementing in the national curriculum based on the local wisdom and the Islamic values. In the end, the students are able to live happily based on the Islamic rules by implementing the good behavior. Similar to the al

  11. Microscopic Properties of Long-Period Ordering in Al-Rich TiAl Alloys

    Science.gov (United States)

    Hata, S.; Nakano, T.; Kuwano, N.; Itakura, M.; Matsumura, S.; Umakoshi, Y.

    2008-07-01

    The ordering mechanism of long-period superstructures (LPSs) in Al-rich TiAl alloys has been investigated by high-resolution transmission electron microscopy (HRTEM). The LPSs are classified in terms of arrangements of base clusters with different shapes and compositions formed in Ti-rich (002) layers of L10-TiAl matrix: square Ti4Al, fat rhombus Ti3Al, and lean rhombus Ti2Al type clusters. The HRTEM observations revealed that antiphase boundaries of long-range-ordered LPS domains and short-range-ordered microdomains are constructed by various space-filling arrangements of the base clusters. Such a microscopic property characterized by the base clusters and their arrangements is markedly analogous to that of the {left< {{text{1,1/2,0}}} rightrangle } * special-point ordering alloys such as Ni-Mo.

  12. Mechanochemical Synthesis and Rapid Consolidation of Nanocrystalline 3NiAl-Al2O3 Composites

    Directory of Open Access Journals (Sweden)

    In-Jin Shon

    2011-01-01

    Full Text Available Nanopowders of 3NiAl and Al2O3 were synthesized from 3NiO and 5Al powders by high-energy ball milling. Nanocrystalline Al2O3 reinforced composite was consolidated by high-frequency induction-heated sintering within 3 minutes from mechanochemically synthesized powders of Al2O3 and 3NiAl. The advantage of this process is that it allows very quick densification to near theoretical density and inhibition grain growth. Nanocrystalline materials have received much attention as advanced engineering materials with improved physical and mechanical properties. The relative density of the composite was 97%. The average Vickers hardness and fracture toughness values obtained were 804 kg/mm2 and 7.5 MPa⋅m1/2, respectively.

  13. Effects of Al(III) and nano-Al13 species on malate dehydrogenase activity.

    Science.gov (United States)

    Yang, Xiaodi; Cai, Ling; Peng, Yu; Li, Huihui; Chen, Rong Fu; Shen, Ren Fang

    2011-01-01

    The effects of different aluminum species on malate dehydrogenase (MDH) activity were investigated by monitoring amperometric i-t curves for the oxidation of NADH at low overpotential using a functionalized multi-wall nanotube (MWNT) modified glass carbon electrode (GCE). The results showed that Al(III) and Al(13) can activate the enzymatic activity of MDH, and the activation reaches maximum levels as the Al(III) and Al(13) concentration increase. Our study also found that the effects of Al(III) and Al(13) on the activity of MDH depended on the pH value and aluminum speciation. Electrochemical and circular dichroism spectra methods were applied to study the effects of nano-sized aluminum compounds on biomolecules.

  14. Comparison of Al electromigration in conventional Al alloy and W-plug contacts to silicon

    Science.gov (United States)

    Oates, A. S.; Martin, E. P.; Alugbin, D.; Nkansah, F.

    1993-06-01

    We examine the impact of the presence of a W plug on electromigration-induced voiding of the Al alloy layer of contacts to silicon. By comparing conventional Al alloy and W-plug contacts we show that the presence of the plug does not significantly improve the intrinsic susceptibility of contacts to Al voiding despite the elimination of the Al step coverage problem. Both the conventional Al alloy and W-plug contacts degrade by drift of the Al layer with a velocity that is not influenced by the contact structure. The sheet resistance of the underlayer material of multilayer conductors plays an important role in influencing failure times since it determines the rate of resistance increase due to electromigration.

  15. Kinetic Monte Carlo of transport processes in Al/AlOx/Au-layers: Impact of defects

    Science.gov (United States)

    Weiler, Benedikt; Haeberle, Tobias; Gagliardi, Alessio; Lugli, Paolo

    2016-09-01

    Ultrathin films of alumina were investigated by a compact kMC-model. Experimental jV-curves from Al/AlOx/Au-junctions with plasma- and thermal-grown AlOx were fitted by simulated ones. We found dominant defects at 2.3-2.5 eV below CBM for AlOx with an effective mass mox ∗= 0.35 m0 and a barrier EB ,A l /A l O x≈2.8 eV in agreement with literature. The parameterization is extended to varying defect levels, defect densities, injection barriers, effective masses and the thickness of AlOx. Thus, dominant charge transport processes and implications on the relevance of defects are derived and AlOx parameters are specified which are detrimental for the operation of devices.

  16. Effects of Al(III and Nano-Al13 Species on Malate Dehydrogenase Activity

    Directory of Open Access Journals (Sweden)

    Rong Fu Chen

    2011-05-01

    Full Text Available The effects of different aluminum species on malate dehydrogenase (MDH activity were investigated by monitoring amperometric i-t curves for the oxidation of NADH at low overpotential using a functionalized multi-wall nanotube (MWNT modified glass carbon electrode (GCE. The results showed that Al(III and Al13 can activate the enzymatic activity of MDH, and the activation reaches maximum levels as the Al(III and Al13 concentration increase. Our study also found that the effects of Al(III and Al13 on the activity of MDH depended on the pH value and aluminum speciation. Electrochemical and circular dichroism spectra methods were applied to study the effects of nano-sized aluminum compounds on biomolecules.

  17. Superconductivity in Al/Al{sub 2}O{sub 3} interface

    Energy Technology Data Exchange (ETDEWEB)

    Palnichenko, A.V., E-mail: paln@issp.ac.ru; Vyaselev, O.M.; Mazilkin, A.A.; Khasanov, S.S.

    2016-06-15

    Highlights: • Al/Al{sub 2}O{sub 3} interface was formed by surface oxidation of Al foil. • Magnetic susceptibility and electrical resistance of the interface was studied. • Superconductivity at ∼ 65 K of the Al/Al{sub 2}O{sub 3} interface was observed. • The superconducting interface is instable under normal conditions. - Abstract: Metastable superconductivity at T{sub c} ≈ 65 K has been observed in Al foil subjected to special oxidation process, according to the ac magnetic susceptibility and electrical resistance measurements. Comparison of the ac susceptibility and the dc magnetization measurements infers that the superconductivity arises within the interfacial granular layer formed during the oxidation process between metallic aluminum and its oxide.

  18. Protective Al2O3 scale formation on NbAl3-base alloys

    Science.gov (United States)

    Doychak, J.; Hebsur, M. G.

    1991-01-01

    The oxidation of NbAl3 with additions of Cr and Y was studied to determine the mechanisms of the beneficial effects of these elements upon oxidation. Cr additions to the binary NbAl3 alloy of up to 6.8 at. percent reduced the scale growth rates and promoted alpha-Al2O3 formation over much longer times relative to binary NbAl3. A major effect of Cr is to form a layer of AlNbCr at the metal/scale interface, which is inherently more oxidation-resistant than the matrix alloy in the long term. Yttrium additions to a Cr-containing alloy improved the scale growth rate and adherence and changed the scale microstructure to mimic that of a typical protective Al2O3 scale.

  19. {sup 27}Al NMR studies of NpPd{sub 5}Al{sub 2}

    Energy Technology Data Exchange (ETDEWEB)

    Chudo, H., E-mail: chudo.hiroyuki@jaea.go.j [Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195 (Japan); Sakai, H.; Tokunaga, Y.; Kambe, S. [Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195 (Japan); Aoki, D.; Homma, Y.; Shiokawa, Y. [Institute for Materials Research, Tohoku University, Oarai, Ibaraki 311-1313 (Japan); Haga, Y.; Ikeda, S.; Matsuda, T.D. [Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195 (Japan); Onuki, Y. [Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195 (Japan); Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043 (Japan); Yasuoka, H. [Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195 (Japan)

    2009-10-15

    We present {sup 27}Al NMR studies for a single crystal of the Np-based superconductor NpPd{sub 5}Al{sub 2}(T{sub c}=4.9K). We have observed a five-line {sup 27}Al NMR spectrum with a center line and four satellite lines separated by first-order nuclear quadrupole splittings. The Knight shift clearly drops below T{sub c}. The temperature dependence of the {sup 27}Al nuclear spin-lattice relaxation rate shows no coherence peak below T{sub c}, indicating that NpPd{sub 5}Al{sub 2} is an unconventional superconductor with an anisotropic gap. The analysis of the present NMR data provides evidence for strong-coupling d-wave superconductivity in NpPd{sub 5}Al{sub 2}.

  20. Preparation of TiAl3-Al composite coating by cold spraying

    Institute of Scientific and Technical Information of China (English)

    SHEN Li; KONG Ling-yan; XIONG Tian-ying; DU Hao; LI Tie-fan

    2009-01-01

    TiAl3-Al coating was deposited on orthorhombic Ti2AlNb alloy substrate by cold spraying with the mixture of pure Al and Ti as the feedstock powder at a fixed molar ratio of 3-1 when the spraying distance, gas temperature and gas pressure for the process were 10 mm, 250 ℃ and 1.8 MPa, respectively. The as-sprayed coating was then subjected to heat treatment at 630 ℃ in argon atmosphere for 5 h at a heating rate of 3 ℃/min and an argon gas flow rate of 40 mL/min. The obtained TiAl3-Al composite coating is about 212 μm with a density of 3.16 g/cm3 and a porosity of 14.69% in general. The microhardness and bonding strength for the composite coating are HV525 and 27.12 MPa.

  1. TEM characterization of oxidized AlGaAs/AlAs nonlinear optical waveguides

    Energy Technology Data Exchange (ETDEWEB)

    Guillotel, E; Langlois, C; Ghiglieno, F; Leo, G; Ricolleau, C, E-mail: cyril.langlois@univ-paris-diderot.f [Laboratoire Materiaux et Phenomenes Quantiques, CNRS-UMR 7162 Universite Paris Diderot - Paris 7 Case courrier 7021, 75205 Paris Cedex 13 (France)

    2010-09-29

    The internal interfaces of multilayer Al{sub x}Ga{sub 1-x}As/AlAs nonlinear optical waveguides are investigated by high-angle annular-dark-field and energy-filtered scanning transmission electron microscopy, before and after partial wet oxidation of AlAs layers. Via a simple phenomenological model, the corresponding roughness parameters allow prediction of the scattering-induced waveguide optical losses, which are in reasonable agreement with the experimental value of 0.5 cm{sup -1}. We also find that Al{sub x}Ga{sub 1-x}As layers adjacent to oxidized AlAs tend to be oxidized through the interfaces, even for low Al fraction, with typical oxidation depths of 9 nm for x = 0.7 and 2 nm for x = 0.

  2. 60Co gamma radiation effect on AlGaN/AlN/GaN HEMT devices

    Institute of Scientific and Technical Information of China (English)

    WANG Yan-Ping; LUO Yin-Hong; WANG Wei; ZHANG Ke-Ying; GUO Hong-Xia; GUO Xiao-Qiang; WANG Yuan-Ming

    2013-01-01

    The testing techniques and experimental methods of the 60Co gamma irradiation effect on AlGaN/AlN/GaN high electron mobility transistors (HEMTs) are established.The degradation of the electrical properties of the device under the actual radiation environment are analyzed theoretically,and studies of the total dose effects of gamma radiation on AlGaN/AlN/GaN HEMTs at three different radiation bias conditions are carried out.The degradation patterns of the main parameters of the AlGaN/AlN/GaN HEMTs at different doses are then investigated,and the device parameters that were sensitive to the gamma radiation induced damage and the total dose level induced device damage are obtained.

  3. Determination of Al Composition in Strained AlGaN Layers

    Institute of Scientific and Technical Information of China (English)

    ZHOU Sheng-Qiang; WU Ming-Fang; YAO Shu-De

    2005-01-01

    @@ Alx Ga1-x N/GaN heterostructures are grown on c-sapphire with the Al composition x from 0.2 to 0.4 and thicknesses from 20nm to 30nm. The lattice parameters a and c are determined from 2θ/ω scan. The AlGaN layers are found to be under tensile strain by using x-ray diffraction. Vegard's law induces a large deviation in Al composition determination by only considering the linear relationship between one lattice parameter (a or c) and Al composition. The accurate determination of Al composition is only possible with consideration of both the lattice parameters a and c, by assuming the tetragonal distortion in the AlGaN layer. Additionally, the results obtained from x-ray diffraction are verified by Rutherford backscattering.

  4. Cryptanalysis of Xinyu et al.'s NTRU-Lattice Based Key Exchange Protocol

    OpenAIRE

    Valluri, Maheswara Rao

    2016-01-01

    Xinyu et al. proposed a public key exchange protocol, which is based on the NTRU-lattice based cryptography. In this paper, we show how Xinyu et al.'s NTRU-KE: A lattice based key exchange protocol can be broken, under the assumption that a man-in-the middle attack is used for extracting private keys of users who participate in the key exchange protocol.

  5. Modified Mechanism of Eutectic Silicon in Al2O3/Al-Si Alloy

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    Al2O3/Al-Si alloy composite was manufactured by squeeze casting. The morphology of the eutectic silicon in the composite was observed by scanning electronic microscope (SEM), and the modified mechanism of eutectic silicon in the composite was approached. The alumina fiber in the composite can trigger twin during the growth of Al-Si eutectic and lead to the modification of eutectic silicon near the fiber.

  6. Two-Phase (TiAl+TiCrAl) Coating Alloys for Titanium Aluminides

    Science.gov (United States)

    Brady, Michael P. (Inventor); Smialek, James L. (Inventor); Brindley, William J. (Inventor)

    1998-01-01

    A coating for protecting titanium aluminide alloys, including the TiAl gamma + Ti3Al (alpha(sub 2)) class, from oxidative attack and interstitial embrittlement at temperatures up to at least 1000 C. is disclosed. This protective coating consists essentially of titanium, aluminum. and chromium in the following approximate atomic ratio: Ti(41.5-34.5)Al(49-53)Cr(9.5-12.5)

  7. Another Security Improvement over the Lin et al.'s E-voting Scheme

    Science.gov (United States)

    Asaar, Maryam Rajabzadeh; Mohajeri, Javad; Salmasizadeh, Mahmoud

    In 2003, Lin et al. have proposed an electronic voting scheme which can be utilized in large-scale elections, and claimed it detects double voting. But in this paper, by presenting an attack, we show that voters can successfully vote more than once without being detected. Hence, we propose a new modified scheme based on the Lin et al.'s scheme with the same efficiency to solve this weakness and analyze its security.

  8. Compressive properties of a reaction milled NiAl-AlN composite

    OpenAIRE

    Whittenberger, J. Daniel; Arzt, Eduard; Luton, Michael J.

    1990-01-01

    Cryomilling (high intensity mechanical ball milling in a liquid nitrogen bath) of the B2 crystal structure nickel aluminide leads to a NiAl composite containing about 10 vol. % of AlN particles. This is the result of a reaction milling process, where nitrogen incorporated into the matrix during cryomilling reacts with Al during subsequent thermomechanical processing to form the composite. Compressive testing at 1300 K of such materials densified by 1505 K extrusion or isostatic pressing at 13...

  9. Generation and evolution of nanoscale AlP and Al{sub 13}Fe{sub 4} particles in Al-Fe-P system

    Energy Technology Data Exchange (ETDEWEB)

    Qiao, Huan; Gao, Tong; Zhu, Xiangzhen; Wu, Yuying; Qian, Zhao; Liu, Xiangfa, E-mail: xfliu@sdu.edu.cn

    2015-02-15

    Highlights: • Diffusion and gradual solid reactions between Al and Fe{sub x}P phases in Al-Fe-P alloy were investigated. • Nanoscale AlP clusters are in-situ generated and evolve during the whole process. • This novel Al-Fe-P alloy has an excellent low-temperature refining performance on hypereutectic Al-Si alloy. - Abstract: In this paper, the gradual solid reactions between Al and Fe{sub x}P phases in Al-Fe-P alloy were investigated. The results show that the whole reaction process undergoes four main stages: the diffusion of Al atom, the generation of (Al, Fe, P) intermediate compound, the precipitation of nano AlP and Al{sub 13}Fe{sub 4} clusters and their growth to submicron particles. The microstructure of Fe-P particles evolves from the “egg-type”, the “sponge-type” to the “sesame-cake” structure. AlP and Al{sub 13}Fe{sub 4} nano phases have in-situ generated and evolved during the whole process. The gradual reaction mechanism has been discussed. Furthermore, a novel Al-Fe-P alloy which contains (Al, Fe, P) intermediate compounds and nano AlP particles has been synthesized and its low-temperature refining performance on A390 alloy has also been investigated.

  10. Microstructure and thermal stability of mechanically alloyed Al3Ti/Al alloy

    Institute of Scientific and Technical Information of China (English)

    林建国; 魏浩岩; 黄正

    2001-01-01

    The microstructure stability of Al3Ti/Al alloy prepared by mechanical alloying (MA) was investigated in the simulating environment in which they may be used. The results show that the MA alloy possesses fine microstructure (the grain size is about 0.5  μm). After cycling loaded followed by heat exposure at 350  ℃ for 24  h, no microstructure coarsening of the alloy occurred, which means that the Al3Ti/Al alloy behaves good microstructure stability at high temperature. The compression yield strength of the alloy reaches up to 247  MPa at 350  ℃.

  11. Hydrolyzed Al(III) clusters: speciation stability of nano-Al13.

    Science.gov (United States)

    Wang, Dongsheng; Wang, Shuifeng; Huang, Chihpin; Chow, Christopher W K

    2011-01-01

    Pure nano-Al13 and aggregates at various concentrations were prepared to examine the particle size effect of coagulation with inorganic polymer flocculant. The property and stability of various species formed were characterized using Infrared, 27Al-NMR, photo correlation spectroscopy (PCS), and Ferron assay. Results showed that concentration and temperature exhibited different roles on the stability of Al13. The quantity of Alb species analyzed by ferron assay in the initial aging period corresponded well with that of Al13, which has been confirmed in a dimension range of 1-2 nm by PCS. Al13 solutions at high concentrations (0.5-2.11 mol/L) were observed to undergo further aggregation with aging. The aggregates with a wide particle size distribution would contribute to the disappeared/decreased Al13 basis on the 27Al-NMR spectrum, whereas a part of Al13 would still remain as Alb. At low concentrations, Al13 solution was quite stable at normal temperature, but lost its stability quickly when heating to 90 degrees C.

  12. Synthesis of core-shell AlOOH hollow nanospheres by reacting Al nanoparticles with water

    Science.gov (United States)

    Lozhkomoev, A. S.; Glazkova, E. A.; Bakina, O. V.; Lerner, M. I.; Gotman, I.; Gutmanas, E. Y.; Kazantsev, S. O.; Psakhie, S. G.

    2016-05-01

    A novel route for the synthesis of boehmite nanospheres with a hollow core and the shell composed of highly crumpled AlOOH nanosheets by oxidizing Al nanopowder in pure water under mild processing conditions is described. The stepwise events of Al transformation into boehmite are followed by monitoring the pH in the reaction medium. A mechanism of formation of hollow AlOOH nanospheres with a well-defined shape and crystallinity is proposed which includes the hydration of the Al oxide passivation layer, local corrosion of metallic Al accompanied by hydrogen evolution, the rupture of the protective layer, the dissolution of Al from the particle interior and the deposition of AlOOH nanosheets on the outer surface. In contrast to previously reported methods of boehmite nanoparticle synthesis, the proposed method is simple, and environmentally friendly and allows the generation of hydrogen gas as a by-product. Due to their high surface area and high, slit-shaped nanoporosity, the synthesized AlOOH nanostructures hold promise for the development of more effective catalysts, adsorbents, vaccines and drug carriers.

  13. Hydrolyzed Al(Ⅲ) clusters: Speciation stability of nano-Al13

    Institute of Scientific and Technical Information of China (English)

    Dongsheng Wang; Shuifeng Wang; Chihpin Huang; Christopher W K. Chow

    2011-01-01

    Pure nano-Al13 and aggregates at various concentrations were prepared to examine the particle size effect of coagulation with inorganic polymer flocculant.The property and stability of various species formed were characterized using Infrared, 27Al-NMR,photo correlation spectroscopy (PCS), and Ferron assay.Results showed that concentration and temperature exhibited different roles on the stability of Al13.The quantity of Alb species analyzed by ferron assay in the initial aging period corresponded well with that of Al13, which has been confirmed in a dimension range of 1-2 nm by PCS.Al13 solutions at high concentrations (0.5-2.11 mol/L) were observed to undergo further aggregation with aging.The aggregates with a wide particle size distribution would contribute to the disappeared/decreased Al13 basis on the 27Al-NMR spectrum, whereas a part of Al13 would still remain as Alb.At low concentrations,Al13 solution was quite stable at normal temperature, but lost its stability quickly when heating to 90℃.

  14. CASTABILITY OF Al-Li-Mg AND Al-Li-Cu-Mg ALLOYS

    OpenAIRE

    1987-01-01

    The objective of the present work is to study the casting characteristics of various Al-Li alloys, which include fluidity and strengths of the alloys and their interaction with cast molds. Materials investigated are Al-Li-Mg and Al-Li-Cu-Mg alloys with Li content of 2.5 wt%. The results show that sand molds with resin binders are good for Al-Li casting. Ceramic coatings can further reduce the metal-mold interactions. However, the permeability is also reduced by coating. The fluidity of Li-bea...

  15. Growth of CdTe: Al films; Crecimiento de peliculas de CdTe: Al

    Energy Technology Data Exchange (ETDEWEB)

    Gonzalez A, M.; Zapata T, M. [CICATA-IPN, 89600 Altamira, Tamaulipas (Mexico); Melendez L, M. [CINVESTAV-IPN, A.P. 14-740, 07000 Mexico D.F. (Mexico); Pena, J.L. [CINVESTAV-IPN, A.P. 73 Cordemex, 97310 Merida, Yucatan (Mexico)

    2006-07-01

    CdTe: AI films were grown by the close space vapor transport technique combined with free evaporation (CSVT-FE). The Aluminum (Al) evaporation was made by two kinds of sources: one made of graphite and the other of tantalum. The films were deposited on glass substrates. The Al source temperature was varied maintaining the CdTe source temperature fixed as well as the substrate temperature. The films were characterized by x-ray energy dispersive analysis (EDAX), x-ray diffraction and optical transmission. The results showed for the films grown with the graphite source for Al evaporation, the Al did not incorporate in the CdTe matrix, at least to the level of EDAX sensitivity; they maintained the same crystal structure and band gap. For the samples grown with the tantalum source, we were able to incorporate the Al. The x-ray diffraction patterns show that the films have a crystal structure that depends on Al concentration. They were cubic up to 2.16 at. % Al concentration; for 19.65 at. % we found a mixed phase; for Al concentration higher than 21 at. % the films were amorphous. For samples with cubic structure it was found that the lattice parameter decreases and the band gap increases with Al concentration. (Author)

  16. Study on Mg/Al Weld Seam Based on Zn–Mg–Al Ternary Alloy

    Directory of Open Access Journals (Sweden)

    Liming Liu

    2014-02-01

    Full Text Available Based on the idea of alloying welding seams, a series of Zn–xAl filler metals was calculated and designed for joining Mg/Al dissimilar metals by gas tungsten arc (GTA welding. An infrared thermography system was used to measure the temperature of the welding pool during the welding process to investigate the solidification process. It was found that the mechanical properties of the welded joints were improved with the increasing of the Al content in the Zn–xAl filler metals, and when Zn–30Al was used as the filler metal, the ultimate tensile strength could reach a maximum of 120 MPa. The reason for the average tensile strength of the joint increasing was that the weak zone of the joint using Zn–30Al filler metal was generated primarily by α-Al instead of MgZn2. When Zn–40Al was used as the filler metal, a new transition zone, about 20 μm-wide, appeared in the edge of the fusion zone near the Mg base metal. Due to the transition zones consisting of MgZn2- and Al-based solid solution, the mechanical property of the joints was deteriorated.

  17. Direct laser cooling Al+ ions optical clocks

    CERN Document Server

    Zhang, J; Luo, J; Lu, Z H

    2016-01-01

    Al$^+$ ions optical clock is a very promising optical frequency standard candidate due to its extremely small blackbody radiation shift. It has been successfully demonstrated with indirect cooled, quantum-logic-based spectroscopy technique. Its accuracy is limited by second-order Doppler shift, and its stability is limited by the number of ions that can be probed in quantum logic processing. We propose a direct laser cooling scheme of Al$^+$ ions optical clocks where both the stability and accuracy of the clocks are greatly improved. In the proposed scheme, two Al$^+$ ions traps are utilized. The first trap is used to trap a large number of Al$^+$ ions to improve the stability of the clock laser, while the second trap is used to trap a single Al$^+$ ions to provide the ultimate accuracy. Both traps are cooled with a continuous wave 167 nm laser. The expected clock laser stability can reach $9.0\\times10^{-17}/\\sqrt{\\tau}$. For the second trap, in addition to 167 nm laser Doppler cooling, a second stage pulsed ...

  18. MOSQUE ARCHITECTURE AS A SUSTAINABLE BUILDING IN URBAN (Case Study: Al Markas Al Islamic Mosque Makassar

    Directory of Open Access Journals (Sweden)

    Imriyanti Imriyanti

    2014-02-01

    Full Text Available Abstract Mosque Architecture is a part of Islamic architecture. Mosque should be fused with elements of nature because its function as a place to pray to God who created the universe. Al Markas Al Islamic Makassar mosque is used as a center of Islamic aspirations of the people and the government to accommodate all the activities of moslems in Makassar. Through this function, the provision of Al Markas Al Islamic mosque began from the desire of Islamic societies in Makassar, which wants the Islamic center to be equipped with facilities and infrastructure as well as architectural, monumental buildings and structures that can be last for hundreds of years (continuous, blend with the environment, and also can be used by the public. Having regard to the function of a mosque especially at the Al Markas Al Islamic Makassar mosque, then the problem that arise is how the Al Markas Al Islamic mosque can be survived/sustainable  in order  to function  as a place  of worship  and  as a center  of Islam.  This research  is a descriptive qualitative research that is trying to generate data in the form of systematic and accurate picture of the object of study. The sustaiprophetlity  of Al Markas AL Islamic mosque can be known through the concept of Islam  in accordance with the view of Islam as well as the sustaiprophetlity of the buildings that seen in the spatial pattern of the mosque, appearance, natural lighting, natural ventilation, and user behavior of the mosque. Keywords: mosque architecture, sustaiprophetlity, view of Islam     Abstrak Arsitektur masjid merupakan bagian dari arsitektur Islam. Bangunan masjid sebaiknya dapat menyatu dengan unsur alam karena masjid difungsikan sebagai wadah dalam bersujud/sembahyang  kepada Allah SWT yang menciptakan alam semesta ini. Masjid Al Markas Al Islamic Makassar merupakan kompleks kegiatan Islam yang digunakan sebagai pusat aspirasi masyarakat  dan pemerintahan  yang dapat menampung

  19. ‘Uluww al-Isnad dalam Periwayatan Hadis Abu Muhammad al-Husain bin Mas‘ud al-Baghawi

    Directory of Open Access Journals (Sweden)

    Romlah Abubakar Askar

    2016-05-01

    Full Text Available Abu Muhammad al-Husayn Ibnu Mas’ud al-Baghawi (450-516H was one of the leading scholars in Tafsir (Quran exegesis, hadith (prophetic tradition, and fiqh (Islamic legal jurisprudence in his era. He was categorized as muta’akhirūn (scholars who came later on and was instrumental in the development of these three disciplines. In the field of exegesis, he was among the scholars who used al-Ma’tsūr, (commentary stylist, relying on the verses of the Qur’an, hadith, and the statements from the followers of the tabi’īn (the followers of the followers. This can be found in his recorded work Ma’ālim al Tanzīl. In the field of hadith, he preserved the narration method and presenting a new approach by merging some patterns of hadith narration from several books of hadith in his work known as ṭarīqah al-Jam’u (combination [amalgamation] method. This pattern will not occur unless there is the existence of other transmission lines as a second chain of narration used to produce ‘uluww al-Isnād (the noble sanad or nuzūl al-Isnād (descent sanad. It is recorded in his works: al-Jam’u baina al-Ṣaḥīḥain, Sharḥ al-Sunnah and Maṣābiḥ al-Sunnah. In the field of Jurisprudence, he was amongst those mujtahidin from the Shafiee school of thought, recorded in his Majmū’ ‘al-Fatāwā, al-Kifāyah fī al-Furū’ and Kitāb al-Tahdzīb. This paper aims to examine one of al-Baghawi’s skills in sanad collection which is the uluww al-isnād and nuzūl al-isnād, recorded from his two works Ma’ālim al-Tanzīl and Syarḥ al-Sunnah. The quantitative, qualitative and comparative approach has been used in this study to give an authentic description of the terms ‘uluww al-isnād, nuzūl al-isnād from al-Baghawi. Studies have found there are many examples of uluww al-Isnād and nuzūl al-isnāds contained in the patterns of al-Baghawi’s chain of narration towards the Ṣaḥīḥayn of al-Bukhari and Muslim as the mustakhrij

  20. Autologous Stem Cell Transplant for AL Amyloidosis

    Directory of Open Access Journals (Sweden)

    Vivek Roy

    2012-01-01

    Full Text Available AL amyloidosis is caused by clonal plasma cells that produce immunoglobulin light chains which misfold and get deposited as amyloid fibrils. Therapy directed against the plasma cell clone leads to clinical benefit. Melphalan and corticosteroids have been the mainstay of treatment for a number of years and the recent availability of other effective agents (IMiDs and proteasome inhibitors has increased treatment options. Autologous stem cell transplant (ASCT has been used in the treatment of AL amyloidosis for many years. It is associated with high rates of hematologic response and improvement in organ function. However, transplant carries considerable risks. Careful patient selection is important to minimize transplant related morbidity and mortality and ensure optimal patient outcomes. As newer more affective therapies become available the role and timing of ASCT in the overall treatment strategy of AL amyloidosis will need to be continually reassessed.

  1. Analyse de Viaje al pasado: los aztecas

    OpenAIRE

    Denis Lucchinacci

    2005-01-01

    1. Présentation du logiciel Viaje al pasado: los aztecas (el perfecto simple y el imperfecto en la narración y la descripción) a été conçu par Annie Desnoyers, linguiste à l'université de Montréal et Matilde Asencio, enseignante au Cégep du Vieux Montréal (Collège d'enseignement général et professionnel []), pour un public d'étudiants d'Espagnol Langue Étrangère (ELE). Disponible en deux versions - en ligne et sous forme de cédérom -, il s'agit d'un exerciseur destiné à la pratique du passé e...

  2. Analyse de Viaje al pasado: los aztecas

    Directory of Open Access Journals (Sweden)

    Denis Lucchinacci

    2005-11-01

    Full Text Available 1. Présentation du logiciel Viaje al pasado: los aztecas (el perfecto simple y el imperfecto en la narración y la descripción a été conçu par Annie Desnoyers, linguiste à l'université de Montréal et Matilde Asencio, enseignante au Cégep du Vieux Montréal (Collège d'enseignement général et professionnel [], pour un public d'étudiants d'Espagnol Langue Étrangère (ELE. Disponible en deux versions - en ligne et sous forme de cédérom -, il s'agit d'un exerciseur destiné à la pratique du passé e...

  3. Thermal Properties of Al-50%Si Alloys

    Institute of Scientific and Technical Information of China (English)

    Akio Nishimoto; Katsuya Akamatsu; Kazuyoshi Nakao; Kazuo Ichii

    2004-01-01

    In order to prepare a hypereutectic Al-Si alloy with low coefficients of thermal expansion (CTE), Al-50was produced by powder metallurgy (P/M) and ingot metallurgy (I/M). P/M specimen was prepared by mechanical alloying(MA) and pulsed electric-current sintering (PECS). The microstructures of specimens were characterized by optical microscopy and scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectroscopy (EDS). Vickers microhardness and CTE measurements were performed. The grains in the P/M specimen were refined with increasing MA time. Primary Si and eutectic Si in the I/M specimen were remarkably refined by adding minute amounts of Sr. The CTE of P/M and I/M specimens were estimated as 7.8×10-6 and 10.7×10-6, respectively. These values were as same as a CTE of Al2O3 ceramics.

  4. [Al-Biruni--a universal scientist].

    Science.gov (United States)

    Kujundzić, E; Masić, I

    1999-01-01

    Al-Biruni's was of Persian descent. He was born in Horesmiya and had studied mathematics, history and medicine. Acquiring knowledge from these sciences, he wrote an outstanding work on chronology of several nations and devoted it to Ziyarit ruler Kabus. He made a chronological overview of calendars from many nations, including Persians, Greeks, Egyptians, Jews, Melkitian and Nestorian Christians, Sabeyaans as well as the old Arabs. Data presented in the work, according to the later authors, were taken from very reliable sources. He was contemporary of Ibn-Sina, and thanks to their friendship, they have discussed very much miscellaneous topics. He belonged to the group of scholars, taken by Gaznevian Soultan Mahmud to a long journey to India. Afterwards Al-Biruni wrote and published detailed work "Description of India"--a work on cultural history of India. Due to excellent abilities of Al-Biruni as a philosopher and scholar, there are still significant and reliable notes about buddhistic philosophy, structure of castes and Brahmans' life style. In this Al-Biruni's masterpiece, there are many comparative analysis of Suffism and certain Indian philosophical methods. Al-Biruni's most important work is "Pharmacopoeia"--"Kitab al-saydala", which brilliantly describes all medicaments. This work has been published in many languages. He also wrote few works on astronomy and astrology. In those works he has explained some astrological events through scientific approach in a such peculiar way that nobody has ever explained before. He was also interested in sciences like geology, mineralology, geography, mathematics, psychology and many others.

  5. Kritik Terhadap Pemikiran Tasawuf Al-Raniri

    Directory of Open Access Journals (Sweden)

    Syaifan Nur

    2013-12-01

    Full Text Available Abstract : Al-Raniri is often positioned by some scholars as “superior” figure, which is contrasted to Hamzah Fansuri and Syamsuddin Sumaterani, and that is why they predicate him as one of pioneer of Islamic reformer in Malay- Indonesian archipelago. Anti-wujūdiyyah Sufism campaign by al-Raniri quite successful to some extent to amputate the rate of development of philosophical Sufism was brought by Fansuri and Sumaterani in the one hand, and strike off the nature of moral Sufism in the other, redeemed by bloodshed. This article discussed the “superiority” of al-Raniri’s thought of Sufism, viewed from a broader spectrum, either in relation to problems of faith or theology and politics surrounding the circumstance of his time.Keywords : Philosophical tasawuf, neo-sufism, panteism, tajalli, God’s attributeAbstrak : Al-Raniri oleh banyak kalangan seringkali diposisikan sebagai tokoh “superior” yang diperlawankan dengan Hamzah Fansuri dan Syamsuddin Sumaterani, dan itu sebabnya para ahli memberinya predikat sebagai seorang pelopor pembaru (mujaddid Islam di Nusantara. Anti tasawuf wujūdiyyah yang dikampanyekan oleh al-Raniri cukup berhasil mengamputasi laju perkembangan tasawuf falsafi yang dibawa oleh Fansuri dan Sumaterani di satu sisi, dan melancarkan laju corak tasawuf akhlaki di sisi lain, yang ditebus dengan cara pertumpahan darah. Tulisan ini mendiskusikan “superioritas” pemikiran tasawuf al-Raniri tersebut, dilihat dari spektrum yang lebih luas, baik menyangkut persoalan keyakinan atau teologi maupun politik yang mengitari situasi zamannya.Kata kunci : Tasawuf falsafi , neo-sufisme, panteisme, tajalli, sifat Tuhan

  6. Fabrication of Al-Al3Ti/Ti3Al Functionally Graded Materials under a Centrifugal Force

    Directory of Open Access Journals (Sweden)

    Yoshimi Watanabe

    2010-09-01

    Full Text Available Fabrication of Al-Al3Ti functionally graded materials (FGMs under the centrifugal force has recently attracted some attention. The controlled compositional gradient of the fabricated FGMs, the low cost of the process, and the good mold filling, are the main advantages of the centrifugal method (CM. Using the conventional CM techniques such as the centrifugal solid-particle method and centrifugal in-situ method, FGMs rings with gradually distributed properties could be achieved. As a more practical choice, the centrifugal mixed-powder method (CMPM was recently proposed to obtain FGMs containing nano-particles selectively dispersed in the outer surface of the fabricated parts. However, if a control of the particles morphology, compound formulas or sizes, is desired, another CM technique is favored. As a development of CMPM, our novel reaction centrifugal mixed-powder method (RCMPM has been presented. Using RCMPM, Al‑Al3Ti/Ti3Al FGMs with good surface properties and temperature controlled compositional gradient could be achieved. In this short review, this novel method will be discussed in detail and the effect of RCMPM processing temperature on the reinforcement particles morphology, size and distribution through the fabricated samples, will be reviewed.

  7. Total energy, equation of state and bulk modulus of AlP, AlAs and AlSb semiconductors

    Indian Academy of Sciences (India)

    A R Jivani; H J Trivedi; P J Gajjar; A R Jani

    2005-01-01

    Recently proposed model potential which combines both linear and quadratic types of interactions is employed for the investigation of some properties like the total energy, equation of state and bulk modulus of AlP, AlAs and AlSb semiconductor compounds using higher-order perturbation theory. The model potential parameter is determined using zero pressure condition. The ratio of the covalent bonding term E cov to the second-order term 2 is 6.77% to 11.85% which shows that contribution from higher order terms are important for zinc-blende-type crystals. The calculated numerical results of the total energy, energy band gap at Jones-zone face and bulk modulus of these compounds are in good agreement with the experimental data and found much better than other such theoretical findings. We have also studied pressure–volume relations of these compounds. The present study is carried out using six different screening functions along with latest screening function proposed by Sarkar et al. It is found from the present study that effect of exchange and correlation is clearly distinguishable.

  8. Semantische Merkmale als Mittel der Textkonstitution

    Directory of Open Access Journals (Sweden)

    Stojan Bračič

    2008-12-01

    Full Text Available Im folgenden Beitrag sollen semantische Relationen unter die Lupe genommen werden, die im text dazu beitragen, dass einzelne Textkomponenten miteinander verknüpft werden. Dabei geht es hauptsächlich um Relationen, die nicht satzthematisch sind - diese sind nämlich als textuelle Koreferenzketten ausreichend untersucht worden (vgl. u.a. Bračič/Fix/Greule 2007 - sondern um jene Relationen, die als Prädikationen einzelner textgrammatischer Einheiten (Sätze vorkommen und ebenfalls gewisse geordnete Strukturierungen aufweisen.

  9. Aspectos biopsicosociales asociados al embarazo adolescente

    OpenAIRE

    2012-01-01

    Introducción: El embarazo en la adolescencia, es un evento inesperado, sorpresivo. Este artículo establece la importancia de identificar los aspectos biopsicosociales asociados al embarazo adolescente en las embarazadas asistentes al programa de Control Prenatal de una Empresa Social del Estado de nivel 1 en Montería en 2009, para comprender las actitudes y los comportamientos asociados a esta etapa tan temprana. Materiales y Métodos: Es un estudio descriptivo, cuantitativo, de corte transver...

  10. The wobbler mouse, an ALS animal model

    DEFF Research Database (Denmark)

    Moser, Jakob Maximilian; Bigini, Paolo; Schmitt-John, Thomas

    2013-01-01

    This review article is focused on the research progress made utilizing the wobbler mouse as animal model for human motor neuron diseases, especially the amyotrophic lateral sclerosis (ALS). The wobbler mouse develops progressive degeneration of upper and lower motor neurons and shows striking...... the disease mechanism and testing various therapeutic approaches and discuss the relevance of these advances for human ALS. The identification of the causative mutation linking the wobbler mutation to a vesicle transport factor and the research focussed on the cellular basis and the therapeutic treatment...

  11. Simulations of the premelting of Al(110)

    DEFF Research Database (Denmark)

    Stoltze, Per

    1990-01-01

    The premelting of Al(110) is studied by molecular dynamics simulations using the potential for Al derived from effective medium theory. We find a progressive disordering of the surface region as the bulk melting point is approached. This disorder is mediated by the formation of adatom–vacancy pairs....... Based on the calculated radial distribution function and the analytical expression for the energy, it is demonstrated that the thermodynamics of disorder and melting is reflected in the single particle properties by a decrease in the number of nearest neighbors. The Debye temperature for the surface...

  12. Del Derecho laboral al Derecho del trabajo

    OpenAIRE

    Jaramillo Jassir, Ivan Daniel

    2011-01-01

    El Derecho Laboral hijo de la revolución industrial, calificado como el acontecimiento jurídico del siglo XX, reduce su ámbito de estudio al trabajo subordinado. Los cambios del sistema de producción superan la centralidad del contrato de trabajo subordinado a tiempo indeterminado, situación que demanda ampliación del ámbito de aplicación subjetivo y objetivo de la materia, dando paso al Derecho del Trabajo que se ocupa del trabajo en todas sus modalidades como fuente de ingreso para satisfac...

  13. Nuestra labor de mirar al otro

    OpenAIRE

    Campos Saborío, Natalia

    2016-01-01

    El estudio etnográfico que dio origen al libro que hoy presentamos, se tituló la "Etnografía del cambio educativo en el ámbito de la investigación social". Una de sus misiones fue buscar al otro, entendiéndose el otro, de aquí en adelante como director, directora, docentes, niños y niñas y padres de familia de la escuela #1, como la llamamos en la investigación antes citada.

  14. Magnetic Properties of NdAl2

    DEFF Research Database (Denmark)

    Bak, P.

    1974-01-01

    The magnetic properties of NdAl2 are calculated using a Hamiltonian including crystal-field and isotropic exchange interaction terms. A two-dimensional mean-field theory is evaluated to calculate single-crystal magnetization curves. It is shown that the magnetic properties can be understood using...... the crystal-field parameters derived from the magnetic exciton spectrum measured by Houmann et al. by means of inelastic neutron scattering. The combined lambda -Schottky anomaly in the heat capacity is explained. No additional parameters are introduced....

  15. Vibrations on Al surfaces covered by sodium

    Science.gov (United States)

    Rusina, G. G.; Eremeev, S. V.; Borisova, S. D.; Sklyadneva, I. Yu.; Chulkov, E. V.

    2006-09-01

    In this paper we present the results of a comparative study of vibrational and structural properties of the ordered (√{3}×√{3})R30∘ and c(2 × 2) phases formed by Na adatoms at room temperature on the Al(1 1 1) and Al(1 0 0) surfaces, respectively. The surface relaxation, surface phonon dispersion, and polarization of vibrational modes are calculated using the embedded-atom method. Our calculated structural parameters are in agreement with experimental and ab initio results. The obtained vibrational frequencies compare fairly well with available experimental data.

  16. Metamagnetism in Ce(Ga,Al)2

    Indian Academy of Sciences (India)

    K G Suresh; S Radha; A K Nigam

    2002-05-01

    Effect of Al substitution on the magnetic properties of Ce(Ga1-Al)2 ( = 0, 0.1 and 0.5) system has been studied. The magnetic state of CeGa2 is found to be FM with a C of 8 K, whereas the compounds with =0.1 and 0.5 are AFM and possess N of about 9 K. These two compounds undergo metamagnetic transition and the critical fields are about 1.2 T and 0.5 T, respectively at 2 K. These variations are explained on the basis of helical spin structure in these compounds.

  17. Instability of TiC and TiAl3 compounds in Al-10Mg and Al-5Cu alloys by addition of Al-Ti-C master alloy

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    The performance of Al-Ti-C master alloy in refining Al-10Mg and A1-5Cu alloys was studied by using electron probe micro-analyzer (EPMA) and X-ray diffractometer (XRD) analysis.The results indicate that there are obvious fading phenomena in both Al-10Mg and Al-5Cu alloys with the addition of Al-5Ti-0.4C refiner which contains TiC and TiAl3 compounds.Mg element has no influence on the stability of TiC and TiAl3, while TiC particles in Al-10Mg alloy react with Al to form Al4C3 particles, resulting in the refinement fading.However, TiC particles are relatively stable in Al-5Cu alloy, while TiAl3 phase reacts with Al2Cu to produce a new phase Ti(Al, Cu)2, which is responsible for the refinement fading in Al-5Cu alloy.These indicate that the refinement fading will not occur only when both the TiC particles and TiAl3 compound of Al-Ti-C refiner are stable in Al alloys.

  18. Directional Solidification and Mechanical Properties of NiAl-NiAlTa Alloys

    Science.gov (United States)

    Johnson, D. R.; Chen, X. F.; Oliver, B. F.; Noebe, R. D.; Whittenberger, J. D.

    1995-01-01

    Directional solidification of eutectic alloys is a promising technique for producing in-situ composite materials exhibiting a balance of properties. Consequently, the microstructure, creep strength and fracture toughness of directionally solidified NiAl-NiAlTa alloys were investigated. Directional solidification was performed by containerless processing techniques to minimize alloy contamination. The eutectic composition was found to be NiAl-15.5 at% Ta and well-aligned microstructures were produced at this composition. A near-eutectic alloy of NiAl-14.5Ta was also investigated. Directional solidification of the near-eutectic composition resulted in microstructures consisting of NiAl dendrites surrounded by aligned eutectic regions. The off-eutectic alloy exhibited promising compressive creep strengths compared to other NiAl-based intermetallics, while preliminary testing indicated that the eutectic alloy was competitive with Ni-base single crystal superalloys. The room temperature toughness of these two-phase alloys was similar to that of polycrystalline NiAl even with the presence of the brittle Laves phase NiAlTa.

  19. Electronic states and spin-forbidden cooling transitions of AlH and AlF.

    Science.gov (United States)

    Wells, Nathan; Lane, Ian C

    2011-11-14

    The feasibility of laser cooling AlH and AlF is investigated using ab initio quantum chemistry. All the electronic states corresponding to the ground and lowest two excited states of the Al atom are calculated using multi-reference configuration interaction (MRCI) and the large AV6Z basis set for AlH. The smaller AVQZ basis set is used to calculate the valence electronic states of AlF. Theoretical Franck-Condon factors are determined for the A(1)Π→ X(1)Σ(+) transitions in both radicals and found to agree with the highly diagonal factors found experimentally, suggesting computational chemistry is an effective method for screening suitable laser cooling candidates. AlH does not appear to have a transition quite as diagonal as that in SrF (which has been laser cooled) but the A(1)Π→ X(1)Σ(+) transition transition of AlF is a strong candidate for cooling with just a single laser, though the cooling frequency is deep in the UV. Furthermore, the a(3)Π→ X(1)Σ(+) transitions are also strongly diagonal and in AlF is a practical method for obtaining very low final temperatures around 3 μK.

  20. Electronic circuits having NiAl and Ni.sub.3 Al substrates

    Energy Technology Data Exchange (ETDEWEB)

    Deevi, Seetharama C. (Midlothian, VA); Sikka, Vinod K. (Oak Ridge, TN)

    1999-01-01

    An electronic circuit component having improved mechanical properties and thermal conductivity comprises NiAl and/or Ni.sub.3 Al, upon which an alumina layer is formed prior to applying the conductive elements. Additional layers of copper-aluminum alloy or copper further improve mechanical strength and thermal conductivity.

  1. Electronic circuits having NiAl and Ni{sub 3}Al substrates

    Energy Technology Data Exchange (ETDEWEB)

    Deevi, S.C.; Sikka, V.K.

    1999-10-12

    An electronic circuit component having improved mechanical properties and thermal conductivity comprises NiAl and/or Ni{sub 3}Al, upon which an alumina layer is formed prior to applying the conductive elements. Additional layers of copper-aluminum alloy or copper further improve mechanical strength and thermal conductivity.

  2. Muslih b. `Abd al-Rahman al-Maraqî : Muslikh of Mranggen

    NARCIS (Netherlands)

    Bruinessen, M.M. van

    2007-01-01

    MUSLIH b. `ABD AL-RAHMAN AL-MARAQÎ (KH. Muslikh of Mranggen) [Indonesia; 1917-1981] [Dictionnaire biographique des savants et grandes figures du monde musulman périphérique, du XIXe siècle à nos jours, Fasc. no 2. Paris: CNRS-EHESS, 1998, p. 23-24] One of the most influential Javanese teachers of t

  3. Fabrication and Characterization of AL-AL4C3 Nanocomposite by Mechanical Alloying

    Science.gov (United States)

    Mohammad Sharifi, E.; Enayati, M. H.; Karimzadeh, F.

    Aluminum carbide (Al4C3) seems to be an ideal reinforcement for producing aluminum matrix composites. Al4C3 has high hardness and shear strength as well as a high melting point. The dispersion of Al4C3 particles in the matrix produces a pinning effect that reduces aluminum grain growth, which improves the mechanical properties. In this study, aluminum powders were mixed with 4.5 wt.% graphite and mechanically alloyed using a high-energy ball mill in order to produce Al-Al4C3 nanocomposite. The structural evaluation of powder particles after different milling times was studied by X-ray diffractometry, scanning electron microscopy and microhardness measurements. The aluminum crystallite size estimated with broadening of XRD peaks by Williamson-Hall formula. XRD results suggested that the grain size of aluminum decreased to nanometer range (30 nm) during ball milling. No Al4C3 formed during the mechanical alloying process. Milled powders were then annealed at 300-600 °C for 1 h under argon atmosphere. Annealing at temperatures higher than 300 °C led to formation of Al4C3 phase which increased as annealing temperature increased. Aluminum grain size remained in nanometer range after annealing process. The microhardness of powder particles increased after annealing. Both effects are due to the formation of nanosized Al4C3 particles.

  4. Sintering Behavior of CNT Reinforced Al6061 and Al2124 Nanocomposites

    Directory of Open Access Journals (Sweden)

    Nouari Saheb

    2014-01-01

    Full Text Available Ball milling and spark plasma sintering were successfully used to produce carbon nanotube reinforced Al6061 and Al2124 nanocomposites which have potential applications in the fields of aerospace, automotive, electronics, and high precision instrumentation. Al2124 and Al6061 nanocomposite powders containing 0.5 to 2 wt.% CNTs prepared through sonication and wet ball milling were spark plasma sintered at 400, 450, and 500°C for 20 minutes under a pressure of 35 MPa. CNTs were better dispersed, and less agglomerated and had good adhesion to the matrix in composites containing 1 wt.% CNTs. The increase of CNT content to 2 wt.% led to the formation of CNT clusters which resulted in less uniform and homogenous composite powders. Almost full densification of Al6061 reinforced with CNTs was achieved at 500°C. Also, CNTs reinforced Al2124 nanocomposites reached very high densities at 500°C. Composites reinforced with 1 wt.% CNTs displayed better densification compared to composites containing 2 wt.% CNTs. The increase of CNTs content from 0.5 to 1 wt.% increased the hardness of the Al6061 and Al2124 alloys to maximum values. Further increase of CNTs content to 2 wt.% decreased the hardness to values lower than that of the monolithic alloys.

  5. Thermodynamic Assessments of Al-In-Sb and Al-In-As Systems

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    The experimental thermodynamic and phase diagram data of the Al-In-Sb and Al-In-As ternary systems were critically assessed.A set of self-consistent thermodynamic model parameters were obtained to describe the phase equilibria and the thermodynamic properties of two systems.In most cases,the calculated values agree very well with the experimental data.

  6. Synthesis of TiAl-Ti2AlN composites by in-situ crystallization

    Institute of Scientific and Technical Information of China (English)

    ZHU Jian-feng; GAO Ji-qiang; WANG Fen

    2006-01-01

    The amorphization process during mechanical alloying (MA) was investigated for the Ti-50%/Al (mole fraction) powder mixtures with no special protection conditions. During the milling process, with the milling time prolonging, the metallic powder Ti and Al were finely mixed, gradually, aluminum completely dissolved into titanium to form an Ti(Al) hcp supersaturated solid solution, and finally, transformed to the amorphous phase after milled for about 39 h. As a result of heat treatment in hot press sintering processing for the mechanically alloyed amorphous powders in vacuum, a submicrostructure intermetallics of TiAl/Ti2AlN composite can be produced by in-situ crystallization. Furthermore, the structure evolution, phase formation and transformation during the heat treatment were also investigated by X-ray diffractometry and differential thermal analysis. The results show that the reaction involves many transitional stages, including formation of TiAl3 and transformation into TiAl and Ti3Al. The examination show that the composite materials fabricated by this in-situ crystallization from amorphization have good mechanical properties due to fine grain size and uniform microstructure.

  7. MgAl2O4–-Al2O3 solid solution interaction: mathematical framework and phase separation of -Al2O3 at high temperature

    Indian Academy of Sciences (India)

    Soumen Pal; A K Bandyopadhyay; S Mukherjee; B N Samaddar; P G Pal

    2011-07-01

    Although existence of MgAl2O4–-Al2O3 solid solution has been reported in the past, the detailed interactions have not been explored completely. For the first time, we report here a mathematical framework for the detailed solid solution interactions of -Al2O3 in MgAl2O4 (spinel). To investigate the solid solubility of -Al2O3 in MgAl2O4, Mg–Al spinel (MgO–Al2O3; = 1, 1.5, 3, 4.5 and an arbitrary high value 30) precursors have been heat treated at 1000°C. Presence of only non-stoichiometric MgAl2O4 phase up to = 4.5 at 1000°C indicates that alumina (as -Al2O3) present beyond stoichiometry gets completely accommodated in MgAl2O4 in the form of solid solution. → alumina phase transformation and its subsequent separation from MgAl2O4 has been observed in the Mg–Al spinel powders ( > 1) when the 1000°C heat treated materials are calcined at 1200°C. In the mathematical framework, unit cell of MgAl2O4 (Mg8Al16O32) has been considered for the solid solution interactions (substitution of Mg2+ ions by Al3+ ions) with -Al2O3. It is suggested that combination of unit cells of MgAl2O4 takes part in the interactions when > 5 (MgO–Al2O3).

  8. FABRICATION OF Al/Al2O3 FGM ROTATING DISC

    Directory of Open Access Journals (Sweden)

    A. B. Sanuddin

    2012-06-01

    Full Text Available This study presents a method of fabricating a disc made of Al/Al2O3 functionally graded materials (FGM, using a powder metallurgy manufacturing process. The aim is to develop a processing method for a rotating disc made of FGM, by stacking the slurry, layer by layer in a radial direction. A three-layer functionally graded material of Al/Al2O3 is fabricated with compositions of 10, 20, 30 vol.% Al2O3. The ceramic composition increases from the discs inner (centre to the outer. The combination of these materials can offer the ability to withstand high temperature conditions whilst maintaining strength in extreme environments.

  9. The anodic and cathodic dissolution of Al and Al-Cu-Mg alloy

    Energy Technology Data Exchange (ETDEWEB)

    Mokaddem, M.; Volovitch, P. [Laboratoire de physicochimie des surfaces, UMR7045, Ecole Nationale Superieure de Chimie de Paris, ParisTech, 11, rue Pierre et Marie Curie, Paris (France); Rechou, F.; Oltra, R. [Institut CARNOT de Bourgogne, Electrochimie Interfaciale-Corrosion, UMR5209, Universite de Bourgogne, Dijon (France); Ogle, K., E-mail: kevin-ogle@enscp.f [Laboratoire de physicochimie des surfaces, UMR7045, Ecole Nationale Superieure de Chimie de Paris, ParisTech, 11, rue Pierre et Marie Curie, Paris (France)

    2010-04-15

    Atomic emission spectroelectrochemistry (AESEC) was used to monitor the release of Al from 99.99% aluminum (1199 alloy) and Al, Mg, and Cu from 2024 Al alloy in 30 g/l NaCl electrolyte as a function of pH. The cathodic dissolution of Al was demonstrated and attributed to an increase in the pH at the interface due to the water reduction reaction. The dissolution of Mg was also observed but was a more complex function of current probably depending on the interfacial pH and the Al dissolution rate. The detachment of copper-rich particles was observed as very rapid spectroscopic emission transients (peak width < 10 ms).

  10. Hydrogenation properties of Mg-Al alloys

    DEFF Research Database (Denmark)

    Andreasen, Anders

    2008-01-01

    to disproportionation with the formation of magnesium hydride and metallic aluminum as the final product. Experimental evidence renders this process reversible. It is observed that the enthalpy of hydride formation of magnesium is lowered upon alloying with Al due to a slightly endothermic disproportionation reaction...

  11. The Science of al-Biruni

    CERN Document Server

    Sparavigna, Amelia Carolina

    2013-01-01

    Al-Biruni (973-1048) was one of the greatest scientists of all times. He was an astronomer, mathematician and philosopher, and studied physics and natural sciences. In this paper, we will discuss some of his experimental methods and some instruments he used.

  12. Control al doping Compromiso de Colombia

    Directory of Open Access Journals (Sweden)

    Claudia Prieto

    2015-06-01

    Full Text Available Este documento da a conocer la importante noticia de la aprobación, por parte del Comité Olímpico Internacional (COl, de un laboratorio colombiano, para el control al doping, a la vez que aprovecha la oportunidad para ampliar alguna información sobre este tema.

  13. Niedermolekulare Verbindungen aus Spinnen als chemische Sensoren

    DEFF Research Database (Denmark)

    Olsen, Christian Adam; Kristensen, Anders S.; Strømgaard, Kristian

    2011-01-01

    sie als Leitstrukturen für die Entwicklung, Synthese und biologische Untersuchung synthetischer Analoga verwendet. Weit weniger erforscht sind hingegen Verbindungen, die der Kommunikation von Spinnen dienen. Vor kurzem wurden jedoch auf dem Gebiet der Pheromone und Allomone aus Spinnen neue...

  14. CALCULUL CINETOSTATIC AL MECANISMELOR PLANETARE CILINDRICE

    Directory of Open Access Journals (Sweden)

    Păun ANTONESCU

    2012-05-01

    Full Text Available În lucrare se prezintă o metodă analitică pentru calculul cinetostatic al mecanismului planetarmonomobil cu două roţi dinţate centrale. Se consideră mai întâi cazul general al schemelor cinematice cu douăroţi dinţate solidare tip satelit, în două variante practice (multiplicator şi reductor de turaţie. Este menţionatcazul particular al mecanismelor planetare cu o singură roată satelit cu angrenare dublă (exterioară şiinterioară. Pe baza modelului de analiză cinetostatică a mecanismului planetar monomobil cu două roţi dinţatecentrale, în finalul lucrării se abordează o problemă practică de calcul cinetostatic al unui mecanism planetarcilindric simplu folosit la capul de frezat pentru prelucrarea roţilor dinţate cilindrice cu dinţi curbi înhipocicloidă.

  15. Management of respiratory symptoms in ALS.

    LENUS (Irish Health Repository)

    Hardiman, Orla

    2011-03-01

    Respiratory insufficiency is a frequent feature of ALS and is present in almost all cases at some stage of the illness. It is the commonest cause of death in ALS. FVC is used as important endpoint in many clinical trials, and in decision-making events for patients with ALS, although there are limitations to its predictive utility. There are multiple causes of respiratory muscle failure, all of which act to produce a progressive decline in pulmonary function. Diaphragmatic fatigue and weakness, coupled with respiratory muscle weakness, lead to reduced lung compliance and atelectasis. Increased secretions increase the risk of aspiration pneumonia, which further compromises respiratory function. Bulbar dysfunction can lead to nutritional deficiency, which in turn increases the fatigue of respiratory muscles. Early recognition of respiratory decline and symptomatic intervention, including non-invasive ventilation can significantly enhance both quality of life and life expectancy in ALS. Patients with respiratory failure should be advised to consider an advance directive to avoid emergency mechanical ventilation.

  16. Management of respiratory symptoms in ALS.

    LENUS (Irish Health Repository)

    Hardiman, Orla

    2012-02-01

    Respiratory insufficiency is a frequent feature of ALS and is present in almost all cases at some stage of the illness. It is the commonest cause of death in ALS. FVC is used as important endpoint in many clinical trials, and in decision-making events for patients with ALS, although there are limitations to its predictive utility. There are multiple causes of respiratory muscle failure, all of which act to produce a progressive decline in pulmonary function. Diaphragmatic fatigue and weakness, coupled with respiratory muscle weakness, lead to reduced lung compliance and atelectasis. Increased secretions increase the risk of aspiration pneumonia, which further compromises respiratory function. Bulbar dysfunction can lead to nutritional deficiency, which in turn increases the fatigue of respiratory muscles. Early recognition of respiratory decline and symptomatic intervention, including non-invasive ventilation can significantly enhance both quality of life and life expectancy in ALS. Patients with respiratory failure should be advised to consider an advance directive to avoid emergency mechanical ventilation.

  17. Quantum Criticality in YFe2Al10

    Science.gov (United States)

    Gannon, William; Wu, Liusuo; Zaliznyak, Igor; Qiu, Yiming; Rodriguez-Rivera, Jose; Aronson, Meigan

    Quantum criticality has been studied in many systems, but there are few systems where observed scaling can be unified with a critical free energy F, or where the critical exponents form the basis for QC universality classes. We have identified a new layered material YFe2Al10 that shows remarkably strong QC behavior, where the scaling properties of the magnetic susceptibility and specific heat are consistent with the same F. Recent neutron scattering results paint a remarkable picture of the QC fluctuations in YFe2Al10. In contrast to classical transitions, where fluctuations are relatively long ranged and inelastic scattering is observed at a magnetic zone center, in YFe2Al10 the scattering is independent of wave vector in the critical plane, indicating that the fluctuations are spatially localized, while out of plane scattering indicates that the interplaner interactions are restricted to nearest neighbors. The dynamical susceptibility χ'' ~=E-2 , and is wholly temperature independent, indicating that E/T scaling is present, the signature of QC fluctuations. These results hint that the the criticality in YFe2Al10 is local, which until now has only been found in a few f-electron based compounds.

  18. Colombia frente al manejo del Presupuesto Nacional

    Directory of Open Access Journals (Sweden)

    Germán Enrique Reyes Forero

    2009-07-01

    Colombia pasa de 38 puntos en el 2007 a 46 puntos en el 2009, mejoría que no se corresponde con los múltiples escándalos de corrupción; ésta mejoría responde al manejo de tecnicismos como se intentará aclarar en el presente articulo.

  19. Creative Commons : Erfgoedinstelling als digitaal curator.

    NARCIS (Netherlands)

    Hoorn, Esther

    2008-01-01

    Zijn Creative Commons-licenties een ver-van-mijn-bed-show voor erfgoedinstellingen? Integendeel, betoogt Esther Hoorn. De instellingen kunnen ze gebruiken als ze rechthebbende zijn. Maar belangrijker nog: door het gebruik van deze licenties te stimuleren kunnen ze een spin in het web van netwerken r

  20. Silicon Strengthened CrAlVN Coatings

    Institute of Scientific and Technical Information of China (English)

    Qiang LI; Yue-xiu QIU; Bo LI; Dong-liang ZHAO; De-en SUN; De-hui LI

    2015-01-01

    CrAlVN coatings are of good intrinsic mechanical and tribological properties but lack of strength.Silicon can provide nitride coating high strength and excellent oxidation resistance.Logically,the combination of CrAlVN and Si should provide a good candidate for dry machining.The effect of silicon content on CrAlSiVN coating′s me-chanical,tribological properties and oxidation resistance was investigated.The coatings were deposited on cemented tungsten carbide and Si wafer (100)substrates in an in-line magnetron sputtering system.Grazing incidence X-ray diffractometer,scanning electron microscopy,atomic force microscopy,transmission electron microscopy,electron probe micro-analyzer,X-ray photoelectron spectroscopy and Auger electron spectroscopy were employed to charac-terize the microstructure and chemistry.Nanoindentation and ball-on-disc tribo-tester were used in characterization of the mechanical and tribological properties.Incorporating with silicon,the CrAlVN coating was strengthened (hard-ness:21.2 GPa up to 38.7 GPa);even after 2 h exposure to 700 ℃ in air,the hardness still maintains at 11.0 GPa.

  1. U-ALS: A Ubiquitous Learning Environment

    Science.gov (United States)

    Piovesan, Sandra Dutra; Passerino, Liliana Maria; Medina, Roseclea Duarte

    2012-01-01

    The diffusion of the use of the learning virtual environments presents a great potential for the development of an application which meet the necessities in the education area. In view of the importance of a more dynamic application and that can adapt itself continuously to the students' necessities, the "U-ALS" (Ubiquitous Adapted Learning…

  2. Bulk nanocrystalline Al prepared by cryomilling

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    Bulk nanocrystalline Al was fabricated by mechanically milling at cryogenic temperature (cryomilling) and then by hot pressing in vacuum. By using X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM), the microstructure evolution of the material during cryomilling and consolidation was investigated. With increasing the milling time, the grain size decreased sharply and reduced to 42 nm when cryomilled for 12 h. The grains had grown up, and the columnar grain was formed under the hot pressing and extrusion compared with the cryomilled powders. The grain size of as-extruded specimen was approximately 300-500 nm. The reason of high thermal stability of this bulk was attributed primarily to the Zener pinning from the grain boundary of the AlN arising from cryomilling and the solute drag of the impurity. Tensile tests show that the strength of nanocrystalline Al is enhanced with decreasing grain size. The ultimate tensile strength and tensile elongation were 173 MPa and 17.5%, respectively. It appears that the measured high strength in the cryomilled Al is related to a grain-size effect, dispersion strengthening, and dislocation strengthening.

  3. Production of Al nanocomposite reinforced by Fe-Al intermetallic, Al{sub 4}C{sub 3} and nano-Al{sub 2}O{sub 3} particles using wet milling in toluene

    Energy Technology Data Exchange (ETDEWEB)

    Razavi-Tousi, S.S., E-mail: ser105@mail.usask.ca [Islamic Azad University, Shahrood Branch, Shahrood (Iran, Islamic Republic of); Yazdani-Rad, R. [Materials and Energy Research Center, P.O. Box 31787/316, Karaj (Iran, Islamic Republic of); Manafi, S.A. [Islamic Azad University, Shahrood Branch, Shahrood (Iran, Islamic Republic of)

    2011-06-02

    Highlights: > Production of Al nanocomposite reinforced by Fe-Al intermetallic, Al{sub 4}C{sub 3} and nano-Al{sub 2}O{sub 3} particles using wet milling in toluene. > Production of Al{sub 4}C{sub 3} particles from mechanochemical reaction of Al with PCA. > Effect of second phase particles on sintering. - Abstract: Al matrix nanocomposites were produced by wet milling of Al and nano-alumina powders in a toluene media. X-ray diffraction patterns, inductively coupled plasma, carbon measurement analysis and scanning electron microscopy show that impurities introduced by decomposition of toluene and abrasion of balls and vials are uniformly dispersed in the Al matrix as Al{sub 4}C{sub 3} and Fe-Al intermetallic particles. Though producing homogenous nanocomposites, these second phase particles seem to have a retarding effect on densification of nanocomposite powders.

  4. The origin of Al(OH)(3)-rich and Al(13)-aggregate flocs composition in PACl coagulation.

    Science.gov (United States)

    Lin, Jr-Lin; Huang, Chihpin; Chin, Ching-Ju M; Pan, Jill R

    2009-09-01

    The composition of hydrolyzed Al species is essential for the understanding of coagulation with Al-based coagulants. Surface characteristics of flocs formed by coagulation with two distinct polyaluminum chloride (PACl) coagulants were identified. One commercial coagulant (PACl-C) with voluminous monomeric Al and colloidal Al(OH)(3) and a custom-made PACl (PACl-Al(13)) containing high Al(13) content were applied to destabilize kaolin particles. The flocs formed by PACl-C and PACl-Al(13) at neutral and alkaline pH ranges, respectively, were observed by FE-SEM and HR-TEM. In addition, the Al composition of these flocs was characterized by XPS and HR-XRD, and the imaging of Al(OH)(3) precipitates and Al(13) aggregates were conducted by SEM as well as tapping mode AFM in liquid system. The observations of flocs indicate that the morphology of Al(OH)(3)-rich flocs are fluffy and porous around the edge of flocs, while the Al(13)-aggregate flocs have a glossy contour and irregular structure. Both Al(OH)(3)-rich and Al(13)-aggregate flocs do not possess well-formed crystalline structure except for the Al(13)-like crystal exists in the Al(13)-aggregate flocs. Among Al(OH)(3) precipitates, colloidal Al(OH)(3) is micro-scale in size, while amorphous Al(OH)(3) is nano-scale. During the formation of Al(13) aggregates, some coiled and clustered Al(13) aggregates with smoother surface were observed. The XPS study on floc surface showed that tetrahedral (Al(IV)) /octahedral (Al(VI)) Al ratio on the surfaces of PACl-C and PACl-Al(13) flocs is 1:1.6 and 1:9.9, respectively. Of the in situ formed Al(13), almost half of Al-hydroxide precipitates on the surface of Al(OH)(3)-rich flocs possess the Al(IV) center. It also found that the irregularly aggregated Al(13) with a similar Al(13) crystalline structure subsists on the surface of Al(13)-aggregate flocs.

  5. Microscopic phase field study of the antisite defect of Ni3 Al in binary Ni-Al alloys

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    The temporal evolution feature of a microscopic phase field model is utilized to study the antisite defects of L1 2-Ni 3 Al;this is quite different from other physicist’ interests.There are mainly two points in brief.Firstly,antisite defects Ni Al and Al Ni ,which are caused by the deviation from the stoichiometric Ni 3 Al,coexist in the Ni 3 Al phase.The surplus Ni atom in the Ni-rich side is prone to substitute Al thus producing the antisite defect Ni Al that maintains the stability of the L1 2 structure.In other case,the surplus Al atom in the Al-rich side is accommodated by a Ni sublattice consequently giving rise to antisite defect Al Ni .The calculated equilibrium occupancy probability of Ni Al is much higher than that of Al Ni .This point is generally in line with other theoretical and experimental works.Additionally,both Ni Al and Al Ni have a strong negative correlation to time step during the disorder-order transformation.Since the initial value of Ni Al and Al Ni on each site of the matrix is right at the concentration that we set,we can observe the decrease process of Ni Al and Al Ni from the initial disordered high anti-structure state to their respective equilibrium state,i.e.to the result of the ordering process further coarsening.

  6. Wallada Bint al Mustakfi entre dos culturas

    Directory of Open Access Journals (Sweden)

    shreen Mahmoud Al Refai

    2013-10-01

    Full Text Available La princesa cordobesa Wallada Bint al Mustakfi bil-lah, hija del califa al Mustakfi Muhammad Ibn Abdel Rahman Ibn Obaidil-lah Ibn Al Nasir lidin Al-lah era una poetisa estimable, a quien los grandes poetas no podían superar. Era una mujer única, guapa y decente. Mantenía una relación sentimental con el  poeta y visir Ibn Zaydún. Dicha pasión, narrada por los poemas escritos por ambos amantes, se terminó por la separación debida a los celos, también de ambos;  al poeta le gustó la voz de una esclava de la princesa. Eso dio rabia a la última. Movido también por los celos, Ibn Zaydún dedicó una epístola satírica al visir Ibn Abdús, que estaba enamorado de Wallada. Tal hecho también irritó a la princesa. A pesar de tener amantes y admiradores, Wallada murió sin casarse al  día 2 de safar de 480 (o 484 de la Híjira pasando los ochenta años Me han llamado la atención el carácter tan culto, independiente y liberal de aquella mujer, su relación amorosa con Ibn Zaydún que no acabó felizmente y los muchos años que vivió sin casasre. Parece que la vida de la princesa hispano-musulmana llamó también la atención de muchos escritores árabes y españoles. Prueba de ello son varias obras literarias escritas en árabe y en español sobre Wallada e Ibn Zaydún. Por consiguiente, me resulta muy interesante realizar un estudio comparativo sobre este tema averiguando si, o no, la diferencia de culturas influiría en las opiniones  de los autores sobre la vida sentimental de aquella poetisa cordobesa.

  7. Una ventana al mundo de Kafka.

    Directory of Open Access Journals (Sweden)

    Guillermo Sánchez Medina

    2003-03-01

    Full Text Available

    COMENTARIO AL LIBRO " EL MUNDO PSICOLÓGICO DE KAFKA" POR EL ACADÉMICO ADOLFO DE FRANCISCO ZEA.

     

    Fui invitado en forma comedida, por el doctor Adolfo De Francisco, para comentar su obra: "El Mundo Psicológico de Kafka". Respondí que no era literato y menos crítico de Kafka. Sin embargo, acepté
    hacerlo siendo consciente de las limitaciones que me acompañan y para las que pido de todos ustedes su consideración. Tenía sí el deseo al reto de lo incógnito.
    Además sus argumentos fueron contundentes, pues se referían al compromiso con la Academia y, sin decírmelo, era también con él en nuestra historia compartida. Mis motivaciones y expectativas personales conscientes eran múltiples para sumergirme en sus ideas que mueven el espíritu desde la piel a lo trascendente, de lo interno a lo externo y viceversa, y en que cada palabra puede ser objeto de análisis profundo, pues esa es su esencia. Por ejemplo cuando el doctor De Francisco se refiere a la sublimación y a la estética, a la política, a la religiosidad, a la burguesía, al campesinado, a la nobleza, al absolutismo, al arte o a la historia, a la cosmovisión sociológica y literaria, al psicoanálisis para afrontar la realidad interna y externa, entonces el autor penetra en el mundo de la fantasía y del psiquismo, para entender el simbolismo implícito de Kafka.
    Las motivaciones personales inconscientes, pertenecen a las tendencias irracionales de hundirme en espacios complejos para luego intentar'ordenarlos; en medio está
    la contratransferencia que me une con el autor Adolfo De Francisco y otra la que se refiere a la temática kafkiana...

  8. ELECTROLYSIS OF SWINE MANURE EFFLUENTS USING THREE DIFFERENT ELECTRODES Fe-Fe, Al-Al AND Fe-Al

    Directory of Open Access Journals (Sweden)

    S. Rahman

    2014-01-01

    Full Text Available Swine effluent with high organic strength need to be treated to make it suitable for applying to crop/pasture fields, or discharging to any waterways. Electrocoagulation is a relatively simpler and cheaper technique over biological and chemical treatment methods currently used to treat high-strength industrial and municipal wastewater. The performance of an electrocoagulation system mainly depends on the pH, Electrical Conductivity (EC of the medium, Chemical Oxygen Demand (COD loading rates and catalytic activity of the electrodes used. In this research, a study was conducted to compare the pollutant removal efficiencies of three electrodes (Fe-Fe, Al-Al and Fe-Al with three electric current levels (500, 1000 and 2000 mA while treating swine manure effluents. The electrochemical cell consisted of two parallel rectangular plates (90×25×1.5 mm of Iron (Fe-Fe, Aluminum (Al-Al and Iron-Aluminum (Fe-Al, later on described as hybrid electrodes; immersed in a beaker with 550 mL swine effluents and powered by a Direct Current (DC supply. All studies were conducted in batches at room temperature. In general, removal efficiencies were increased with increasing current densities and electrolysis times for electrodes evaluated. Aluminum electrodes outperformed iron and hybrid (iron-aluminum electrodes in removing Total Phosphorus (TP at all current density levels tested. Overall, use of hybrid electrodes resulted in better COD removal. For the same treatment times (1200 s at higher current density (21 mA cm-2, hybrid electrodes removed about 100% COD, which are about 1.9 and 1.3 times higher than those of aluminum and iron electrodes, respectively. Iron electrodes showed the highest removal efficiency (85% for Total Organic Carbon (TOC at 21 mA cm-2 current density and 1200 s treatment time. Overall, lower Specific Electrical Energy Consumptions (SEECs per kg of Pollutants (TP, COD and TOC were estimated for the aluminum

  9. Medien als Lernform und die Trimediale Redaktion

    Directory of Open Access Journals (Sweden)

    Wolf Hilzensauer

    2015-01-01

    Full Text Available Der vorliegende Artikel beschreibt ein Konzept für eine handlungsorientierte Medienpädagogik im Bildungsbereich. Im Mittelpunkt steht dabei die SO!-Campusredaktion, die als Methode für expansives Lernen die Möglichkeit bietet, unabhängig von Thema oder Medium die Verantwortung für den Lernprozess in die Hände der Lernenden zu legen. Der Dokumentation von Reflexion über den Lernprozess wird dabei eine besondere Bedeutung zugesprochen. Gleichzeitig werden unterschiedliche mediale Gestaltungsmöglichkeiten (Audio/Radio, Video/Fernsehen und Zeitung – sowohl als Print- als auch als Onlinemedium vorgestellt, die durch das Konzept BYOD – bring your own device – auch einfach und niederschwellig im Bildungskontext umsetzbar sind. Dadurch ergeben sich innovative Möglichkeiten, einen Lernprozess sichtbar zu machen und gleichzeitig eine Grundlage für eine alternative Leistungsbeurteilung anzubieten. Die SO!-Campusredaktion wird derzeit an der Pädagogischen Hochschule Salzburg in Kooperation mit dem Communitysender FS1 und der Radiofabrik entwickelt und erprobt. Community Medien nehmen als MedienpartnerInnen eine bedeutende Stellung ein: Durch ihren offenen Zugang zu Know How und Equipment sowie durch die Möglichkeit, Medienproduktionen über die verfügbaren Distibutionskanäle (Radiofrequenz oder Sendeplatz einer breiten Bevölkerung zugänglich zu machen, gewinnt die Medienpädagogik einen wichtigen Mehrwert in ihrer schulischen und außerschulischen Arbeit. (Dieser Artikel knüpft an den Artikel "BYOD, Smartphonefilme und webbasierte Videoschnittprogramme" der Medienimpulse, Ausgabe 2/2014, an.

  10. Some TEM observations of Al2O3 scales formed on NiCrAl alloys

    Science.gov (United States)

    Smialek, J.; Gibala, R.

    1979-01-01

    The microstructural development of Al2O3 scales on NiCrAl alloys has been examined by transmission electron microscopy. Voids have been observed within grains in scales formed on a pure NiCrAl alloy. Both voids and oxide grains grew measurably with oxidation time at 1100 C. The size and amount of porosity decreased towards the oxide-metal growth interface. It was postulated that the voids resulted from an excess number of oxygen vacancies near the oxide-metal interface. Short-circuit diffusion paths were discussed in reference to current growth stress models for oxide scales. Transient oxidations of pure, Y-doped, and Zr-doped NiCrAl was also examined. Oriented alpha-(Al,Cr)2O3 and Ni(Al,Cr)2O4 scales often coexisted in layered structures on all three alloys. Close-packed oxygen planes and directions in the corundum and spinel layers were parallel. The close relationships between oxide layers provided a gradual transition from initial transient scales to steady state Al2O3 growth.

  11. PRECIPITATION HARDENING IN B2-ORDERED NiAl BY Ni2AlTiCOMPOUND

    Institute of Scientific and Technical Information of China (English)

    W.H. Tian; K. Ohishi; M. Nemoto

    2001-01-01

    Microstructural variations and correlated hardness changes in B2-ordered NiAl containing fine precipitation of Ni2AlTi have been investigated by means of transmission electron microscopy (TEM) and hardness tests. The amount of age hardening is not large as compared to the large microstructural variations during aging. TEM observations have revealed that the L21-type Ni2AlTi precipitates keep a lattice coherency with the NiAl matrix at the beginning of aging. By longer periods of aging Ni2AlTi precipitates lose their coherency and change their morphology to the globular ones surrounded by misfit dislocations. The temperature dependence of the yield strength of precipitate-containing B2-ordered NiAl was investigated by compression tests over the temperature range of 873-1273K. The fine precipitation of Ni2AlTi was found to enhance greatly the yield strength and the high-temperature strength is comparison with that of superalloy Mar-M200.``

  12. Wetting of polycrystalline SiC by molten Al and Al-Si alloys

    Science.gov (United States)

    Cong, Xiao-Shuang; Shen, Ping; Wang, Yi; Jiang, Qichuan

    2014-10-01

    The wetting of α-SiC by molten Al and Al-Si alloys was investigated using a dispensed sessile drop method in a high vacuum. In the Al-SiC system, representative wetting stages were identified. The liquid spreading was initially controlled by the deoxidation of the SiC surface and then by the formation of Al4C3 at the interface. The intrinsic contact angle for molten Al on the polycrystalline α-SiC surface was suggested to be lower than 90̊ provided that the oxide films covering the Al and SiC surfaces were removed, i.e., the system is partial wetting in nature. An increase in the Si concentration in liquid Al weakened the interfacial reaction but improved the final wettability. The role of the Si addition on the wetting was presumably attributed to its segregation at the interface and the formation of strong chemical bonds with the SiC surface.

  13. Formation and stability of Al-Nd and Al-Nd-Fe metallic glasses

    Energy Technology Data Exchange (ETDEWEB)

    Battezzati, Livio (Dipartimento di Chimica Inorganica, Chimica Fisica e Chimica dei Materiali, Universita di Torino, Via Pietro Giuria 9, 10125 Turin (Italy)); Baricco, Marcello (Dipartimento di Chimica Inorganica, Chimica Fisica e Chimica dei Materiali, Universita di Torino, Via Pietro Giuria 9, 10125 Turin (Italy)); Antonione, Carlo (Dipartimento di Chimica Inorganica, Chimica Fisica e Chimica dei Materiali, Universita di Torino, Via Pietro Giuria 9, 10125 Turin (Italy))

    1994-07-01

    Partially amorphous Al[sub 91]Nd[sub 9] and Al[sub 86]Nd[sub 9]Fe[sub 5] ribbons were prepared by melt spinning. Metastable crystalline phases were found in both alloys. Complete amorphization of Al[sub 86]Nd[sub 9]Fe[sub 5] was also achieved. Crystallization was monitored by differential scanning calorimetry (DSC). It occurs in two stages at 440 and 510 K for Al[sub 91]Nd[sub 9]. Al[sub 86]Nd[sub 9]Fe[sub 5] presented a eutectic crystallization at 550 K. Microscopy observations, combined with Johnson-Mehl-Avrami (JMA) analyses performed in isothermal DSC traces, showed that Al[sub 91]Nd[sub 9] transforms via growth on pre-existing crystals. Al[sub 86]Nd[sub 9]Fe[sub 5] transformed via heterogeneous nucleation on sites unevenly distributed through the ribbon. The fitting of isothermal peaks by means of the JMA equation was less satisfactory. The limits of this approach are discussed. ((orig.))

  14. Two medieval Maghreb chronicles: Al-Ḏajira Al-Saniyya y el Rawd al-Qirtas

    Directory of Open Access Journals (Sweden)

    Lidia Fernández Fonfría

    2010-03-01

    Full Text Available In the present communication I intend to expose my conclusions on asmall comparative study between two of the earliest Maghreb chronicles throwing information about the North African tribe of Banu Mar÷n arrival to the throne in the thirteenth century Maghreb. With these common features, allowing a more complete picture of anera, which is undoubtedly the least known of the merinid period, their beginning. The similarities and influences between them are such that there are different theories about a possiblecommon authorship. After concluding the study and subsequent analysis of these works, can be extracted that there are substantial differences on a structural and stylistic level that hinder the possible absolute identification of author of the Dhakh÷ra al-Saniyyawith the author of RawÅ al-QirÐās.

  15. Investigation Of Water Assisted Phase Transformation Process From AlPO4-5 to AlPO4-tridymite

    Energy Technology Data Exchange (ETDEWEB)

    Xu, Suochang; Zhao, Zhenchao; Hu, Mary Y.; Han, Xiuwen; Hu, Jian Z.; Bao, Xinhe

    2016-03-15

    Water assisted phase transformation process from crystalized AlPO4-5 to AlPO4-tridymite was studied by the combination of X-ray diffraction (XRD), Scanning Electron Microscopy (SEM) and in situ multinuclear MAS NMR. It is found that water first activates the residue amorphous aluminophosphate in crystalized AlPO4-5 sample through hydrolysis and condensation reactions. Then the activated aluminophosphate species reassemble into AlPO4-tridymite crystalline. Meanwhile, AlPO4-5 transforms into orthorhombic phase during heating process. With further crystallization of AlPO4-tridymite, the amorphous phase is gradually consumed, and mass transportation between AlPO4-5 and AlPO4-tridymite is established through gradually amorphization of AlPO4-5. Finally, most of the AlPO4-5 transforms into the thermodynamically stable dense phase AlPO4-tridymite.

  16. An epidemiological study of cutaneous leishmaniasis in Al-jabal Al-gharbi, Libya.

    Science.gov (United States)

    Abdellatif, Manal Z M; El-Mabrouk, Khamis; Ewis, Ashraf A

    2013-02-01

    Cutaneous leishmaniasis (CL) is an endemic parasitic infection in the Mediterranean region, including Libya and its Al-jabal Al-gharbi province. We aimed at studying the occupational relevance as well as other epidemiological aspects of CL. We investigated 140 CL cases who attended at Gharyan outpatient polyclinic during a period of 6 months in 2009. CL infection was clinically diagnosed and confirmed by demonstration of Leishmania parasites on smears from lesions. Our findings showed that males were more affected than females (P=0.04), and people above 10-years were more affected than younger ones (P=0.0001). A significant percent of CL cases belonged to Al-Kawasem subprovince (P=0.0001). Farm-related activities were the most frequent occupations among CL cases (P=0.04). In addition to farm workers, housewives and students are at risk groups since they are engaged at farm activities. Moreover, those who have occupations that require staying outdoors for a part of night, e.g., policemen, are also at risk. Compared to children, adult CL patients had multiple lesions (P=0.001) that were more prevalent in their upper and lower extremities than the face (P=0.0001). We conclude that CL is a major health problem in Al-jabal Al-gharbi province of Libya. The presence of rodents and sandflies makes it a suitable environment for Leishmania to spread in an endemic epidemiological pattern. Being engaged in farming activities or outdoor occupations increases the risk of infection. Various clinical patterns of CL suggest the presence of more than 1 species of Leishmania at Al-jabal Al-gharbi province. We propose that the 2 species responsible for CL in this area are L. major and L. tropica. Further investigations to identify the leishmanial species responsible for CL at Al-jabal Al-gharbi together with adoption of preventive and control programs are needed.

  17. Pemikiran Politik al-Shawkânî dalam Fath al-Qadîr

    Directory of Open Access Journals (Sweden)

    Yusuf Hanafi

    2015-09-01

    Full Text Available Muhammad b. ‘Alî Muhammad b. ‘Abd Allâh al-Shawkânî al-San‘ânî. He was born in the Hijrah in Shawkân village, Yemen on Monday 28 Dhû al-Qa‘dah 1172 H and died on Tuesday, 27 Jumâd al-Akhîr 1250 H at the age about 78 years. Al-Shawkânî grew up in the San‘a city, it is the capital of the republic of Yemen now. He study first time about religion from his father, then from renowed scholars in San‘a and its surrounding, he was known as a scolar who mastered the various branches of religious sciences. Such as tafsîr, h}adîth, fiqh, us}ûl al-fiqh, history, science of kalâm, philosophy, balâghah, mant}iq etc. the main issue in this article is how political thought in the book of tafsir Fath al-Qadîr is the work of Shawkânî. At the end of article, the authors found that the intended political thinking in the study of Fath al-Qadîr is about constitutional ideas. These ideas about the constitution is limited to the concept of leadership and deliberation, the concept of the right of citizen to obtain justice, and the concept pf the right of citizens to live association and assembly

  18. Al-C/Al-N/Al涂层膜基结合强度工艺试验研究%Study on Bond Strength of Al-C/Al-N/Al Coating Film

    Institute of Scientific and Technical Information of China (English)

    陈梅; 王刚

    2012-01-01

    通过对Al-C/Al-N/Al太阳能选择性吸收涂层沉积工艺的研究,分析了该涂层膜基结合强度较差的原因,进行了不同沉积工艺条件下的涂层膜基结合强度、吸收率和热损试验,对试验结果进行了仔细的分析,优化确认在Al-C/Al-N/Al太阳能选择性吸收涂层沉积工艺基础上实施第N层充N2气体工艺,可以较好的提高涂层的膜基结合强度,同时保证涂层的吸收率和集热管的热损不发生明显的下降.%Through the study of sedimentary technology on the Al-C/Al-N/Al solar energy selective absorption coating,the authors analyzed the reason why the film-basis bond strength is weak,and took experiments on film-basis bond strength of coating,absorptivity and thermal loss under different sedimentary conditions.After analyzing the trial results,it is confirmed that practicing the N layer and N2 air technology based on sedimentary technology on the Al-C/Al-N/Al solar energy selective absorption coating can improve the film-basis bond strength of coating,and ensure the nonoccurrence of apparent decline in coating absorptivity and thermal loss of heat collecting cubes.

  19. Spectroscopic analysis of the open 3d subshell transition metal aluminides: AlV, AlCr, and AlCo

    Science.gov (United States)

    Behm, Jane M.; Brugh, Dale J.; Morse, Michael D.

    1994-10-01

    Three open 3d subshell transition metal aluminides, AlV, AlCr, and AlCo, have been investigated by resonant two-photon ionization spectroscopy to elucidate the chemical bonding in these diatomic molecules. The open nature of the 3d subshell results in a vast number of excited electronic states in these species, allowing bond strengths to be measured by the observation of abrupt predissociation thresholds in a congested optical spectrum, giving D00(AlV)=1.489±0.010 eV, D00(AlCr)=2.272±0.009 eV, and D00(AlCo)=1.844±0.002 eV. At lower excitation energies the presence of discrete transitions has permitted determinations of the ground state symmetries and bond lengths of AlV and AlCo through rotationally resolved studies, giving r0` (AlV, Ω`=0)=2.620±0.004 Å and r0` (AlCo, Ω`=3)=2.3833±0.0005 Å. Ionization energies were also measured for all three species, yielding IE(AlV)=6.01±0.10 eV, IE(AlCr)=5.96±0.04 eV, and IE(AlCo)=6.99±0.17 eV. A discussion of these results is presented in the context of previous work on AlCu, AlNi, AlCa, and AlZn.

  20. In-situ synthesized (Al3Zr+Al2O3)p/A356 composites by direct melt reaction in Al-Zr-O system

    Institute of Scientific and Technical Information of China (English)

    赵玉涛; 李忠华; 程晓农; 戴起勋; 蔡兰

    2003-01-01

    A novel in-situ reaction system Al-Zr-O was developed. In situ Al3Zr and Al2O3 particulate reinforced A356 alloy matrix composites have been fabricated by direct melt reaction method. The results show that the maximum sizes of Al3Zr and Al2O3 particulates synthesized in the system ZrOCl2-A356 are 1 μm and 3 μm respectively, and they are well distributed in the matrix. The investigation shows that the Al3Zr crystal is in the shape of polyhedron and rectangle. There is a faceted growth phenomenon on Al3Zr crystal surface. It is firstly found that the Al3Zr crystal grows in the mechanism of twinning. The twinning plane is (1 1 4), and the twinning direction is [2 2 1]. The crystal morphology of in-situ α-Al2O3 particulate is rectangle or sphere. Furthermore, (Al3Zr+Al2O3)p/A356 composites have not only higher tensile strength at room temperature (376.2 MPa) but also higher yield strength (319.4 MPa) and higher tensile strength at elevated temperature (200 ℃) than those of the A356 alloy. The dry sliding wear test shows that the wear resistance of the (Al3Zr+Al2O3)p/A356 composites is greatly enhanced with increasing particulate volume fraction.

  1. Effect of Applied Pressure on the Joining of Combustion Synthesized Ni3Al Intermetallics with Al Alloy

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    We focused on the surface reinforcement of ligth weight casting alloys with Ni-Al intermetallic compounds by in-situ combustion reaction to improve the surface properties of non-ferrous casting components. In our previous works, green compact of elemental Ni and Al powders were reacted to form Ni3Al intermetallic compound by SHS (Self-propagating high temperature synthesis) reaction with the heat of molten Al alloy and simultaneously bonded with Al casting alloy. But some defects such as tiny cracks and porosities were remained in the reacted compact. So we applied pressure to prevent thermal cracks and fill up the pores with liquid Al alloy by squeeze casting process. The compressed Al alloy bonded with the Ni3Al intermetallic compound was sectioned and observed by optical microscopy and scanning electron microscopy (SEM). The stoichiometric compositions of the intermetallics formed around the bonded interface and in the reacted compact were identified by energy dispersive spectroscopy (EDS) and electron probe micro analysis (EPMA).Si rich layer was formed on the Al alloy side near the bonded interface by the sequential solidification of Al alloy. The porosities observed in the reacted Ni3Al compact were filled up with the liquid Al alloy. The Si particles from the molten Al alloy were detected in the pores of reacted Ni3Al intermetallic compact. The Al casting alloy and Ni3Al intermetallic compound were joined very soundly by applying pressure to the liquid Al alloy.

  2. Hardness Measurement of (TiB2-TiAl)/TiAl Symmetrically Function Gradient Materials

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    (TiB2-TiAl)/TiAl symmetrically function gradient materials (FGM) were prepared by spark plasma sintering (SPS). Owing to the difference of the thermal expansion coefficients between TiB2 and TiAl, a compressive surface stress was introduced to the FGM by the thermal expansion mismatch. The hardness values of the uniform materials and the FGM were tested, respectively. For the FGM with a compressive surface stress, hardness is obviously superior to that of the uniform material.When the FGM was subjected to heat treatment,the hardness decreased due to a partial relaxation of the compressive surface stress.

  3. Structure of 26Al studied by one - nucleon transfer reaction 27Al(d,t

    Directory of Open Access Journals (Sweden)

    Srivastava Vishal

    2015-01-01

    Full Text Available The excited states of 26Al have been produced and studied using 27Al(d,t reaction with 25 MeV deuteron as projectile. Optical model potential parameters were extracted from the measured elastic scattering angular distribution. Zero range distorted wave Born approximation analysis for the ground and 0.223 MeV states of 26Al have been done. The spectroscopic factors calculated for these states are found to be in good agreement with the previously reported values.

  4. Adherent Al2O3 scales formed on undoped NiCrAl alloys

    Science.gov (United States)

    Smialek, James L.

    1987-01-01

    Changes in the spalling behavior of Al2O3 scales formed on an undoped NiCrAl alloy are described. Two samples of Ni-15Cr-13Al (wt pct), one a control and the other sanded, were subjected to 25 oxidation cycles. It is observed that adherent scales formed on the sanded sample; however, the control sample had speckled, spalled scales. The data reveal that the adherent scales are caused by repeated removal of surface layers after each oxidation cycle. It is determined that interfacial segregation of sulfur influences spallation and sulfur removal increases bonding. The effect of moisture on scale adhesions is investigated.

  5. Punishment on Stage: Application of Islamic Criminal Law by Harakat al-Shabaab al-Mujahideen

    OpenAIRE

    Skjelderup, Michael

    2011-01-01

    Harakat al-Shabaab al-Mujahideen, usually referred to as al-Shabaab (“the youth”), is mostly known as a Somali terrorist group. But since the end of 2008 it has functioned as a state power in large parts of Southern and Central Somalia. In this study I sketch out the structure and function of the legal system of the group. Over the last three years they have developed an administrative structure and a legal system which is unprecedented in the Somali conflict, which has lasted for more than 2...

  6. InAlGaAs/AlGaAs quantum wells: line widths, transition energies and segregation

    DEFF Research Database (Denmark)

    Jensen, Jacob Riis; Hvam, Jørn Märcher; Langbein, Wolfgang

    2000-01-01

    We investigate the optical properties of InAlCaAs/AlGaAs quantum wells pseudomorphically grown on GaAs using molecular beam epitaxy (MBE). The transition energies, measured with photoluminescence (PL), are modelled solving the Schrodinger equation, and taking into account segregation in the group...... III sublattice. From a fit to the transition energies, an empirical band gap relation for InAlGaAs is found, in the composition range relevant for growth on GaAs. The PL lines at low temperature (T = 10 K) are broadened due to random alloy fluctuations and an interface roughness of 1.1 monolayers...

  7. Hot Corrosion Behavior of Stainless Steel with Al-Si/Al-Si-Cr Coating

    Science.gov (United States)

    Fu, Guangyan; Wu, Yongzhao; Liu, Qun; Li, Rongguang; Su, Yong

    2017-03-01

    The 1Cr18Ni9Ti stainless steel with Al-Si/Al-Si-Cr coatings is prepared by slurry process and vacuum diffusion, and the hot corrosion behavior of the stainless steel with/without the coatings is studied under the condition of Na2SO4 film at 950 °C in air. Results show that the corrosion kinetics of stainless steel, the stainless steel with Al-Si coating and the stainless steel with Al-Si-Cr coating follow parabolic laws in several segments. After 24 h corrosion, the sequence of the mass gain for the three alloys is the stainless steel with Al-Si-Cr coating steel with Al-Si coating steel without any coating. The corrosion products of the three alloys are layered. Thereinto, the corrosion products of stainless steel without coating are divided into two layers, where the outside layer contains a composite of Fe2O3 and FeO, and the inner layer is Cr2O3. The corrosion products of the stainless steel with Al-Si coating are also divided into two layers, of which the outside layer mainly consists of Cr2O3, and the inner layer is mainly SiO2. The corrosion film of the stainless steel with Al-Si-Cr coating is thin and dense, which combines well with substrate. Thereinto, the outside layer is mainly Cr2O3, and the inside layer is Al2O3. In the matrix of all of the three alloys, there exist small amount of sulfides. Continuous and protective films of Cr2O3, SiO2 and Al2O3 form on the surface of the stainless steel with Al-Si and Al-Si-Cr coatings, which prevent further oxidation or sulfide corrosion of matrix metals, and this is the main reason for the much smaller mass gain of the two alloys than that of the stainless steel without any coatings in the 24 h hot corrosion process.

  8. Mechanical properties and electronic structures of Fe-Al intermetallic

    Science.gov (United States)

    Liu, YaHui; Chong, XiaoYu; Jiang, YeHua; Zhou, Rong; Feng, Jing

    2017-02-01

    Using the first-principles calculations, the elastic properties, anisotropy properties, electronic structures, Debye temperature and stability of Fe-Al (Fe3Al, FeAl, FeAl2, Fe2Al5 and FeAl3) binary compounds were calculated. The formation enthalpy and cohesive energy of these Fe-Al compounds are negative, and show they are thermodynamically stable structures. Fe2Al5 has the lowest formation enthalpy, which shows the Fe2Al5 is the most stable of Fe-Al binary compounds. These Fe-Al compounds display disparate anisotropy due to the calculated different shape of the 3D curved surface of the Young's modulus and anisotropic index. Fe3Al has the biggest bulk modulus with the value 233.2 GPa. FeAl has the biggest Yong's modulus and shear modulus with the value 296.2 GPa and 119.8 GPa, respectively. The partial density of states, total density of states and electron density distribution maps of the binary Fe-Al binary compounds are analyzed. The bonding characteristics of these Fe-Al binary compounds are mainly combination by covalent bond and metallic bonds. Meanwhile, also exist anti-bond effect. Moreover, the Debye temperatures and sound velocity of these Fe-Al compounds are explored.

  9. Microstructure of Ni-Al powder and Ni-Al composite coatings prepared by twin-wire arc spraying

    Institute of Scientific and Technical Information of China (English)

    Ji-xiao Wang; Gui-xian Wang; Jing-shun Liu; Lun-yong Zhang; Wei Wang; Ze Li; Qi-xiang Wang; Jian-fei Sun

    2016-01-01

    Ni–Al powder and Ni–Al composite coatings were fabricated by twin-wire arc spraying (TWAS). The microstructures of Ni-5wt%Al powder and Ni-20wt%Al powder were characterized by scanning electronic microscopy (SEM) and energy dispersive spec-troscopy (EDS). The results showed that the obtained particle size ranged from 5 to 50μm. The morphology of the Ni–Al powder showed that molten particles were composed of Ni solid solution, NiAl, Ni3Al, Al2O3, and NiO. The Ni–Al phase and a small amount of Al2O3 parti-cles changed the composition of the coating. The microstructures of the twin-wire-arc-sprayed Ni–Al composite coatings were characterized by SEM, EDS, X-ray diffraction (XRD), and transmission electron microscopy (TEM). The results showed that the main phase of the Ni-5wt%Al coating consisted of Ni solid solution and NiAl in addition to a small amount of Al2O3. The main phase of the Ni-20wt%Al coating mainly consisted of Ni solid solution, NiAl, and Ni3Al in addition to a small amount of Al and Al2O3, and NiAl and Ni3Al intermet-allic compounds effectively further improved the final wear property of the coatings. TEM analysis indicated that fine spherical NiAl3 pre-cipitates and a Ni–Al–O amorphous phase formed in the matrix of the Ni solid solution in the original state.

  10. Gate length scaling effect on high-electron mobility transistors devices using AlGaN/GaN and AlInN/AlN/GaN heterostructures.

    Science.gov (United States)

    Liao, S Y; Lu, C C; Chang, T; Huang, C F; Cheng, C H; Chang, L B

    2014-08-01

    Compared to AlGaN/GaN HEMT with 0.15 μm T-gate length, the AlInN/AlN/GaN one exhibits much higher current density and transconductance of 1558 mA/mm at Vd = 2 V and 330 mS/mm, respectively. The high extrinsic ft and fmax of 82 GHz and 70 GHz are extracted from AlInN/AlN/GaN HEMT. Besides, we find that the transconductance roll-off is significant in AlGaN/GaN, but largely improved in AlInN/AlN/GaN HEMT, suggesting that the high carrier density and lattice-matched epitaxial heterostructure is important to reach both large RF output power and high operation frequency, especially for an aggressively gate length scaling.

  11. The Formation of γ—AlON Spinel in the Reaction of Al2O3—AlN—MgO System

    Institute of Scientific and Technical Information of China (English)

    LIYawei; YUANRunzhang; 等

    1997-01-01

    The stabilization of γ-aluminium oxyni-tride spinel(γ-AlON) has been investigated by addition of MgO,MgAl2O4,etc.,in reaction process.The results indicated that there are wider solid solution areas near ,Al2O3-rich side in AlN-Al2O3-MgO ternary systems,The content of stabilized AlON phase in samples is related to heating temperatures,additives,etc.The lattice parameters of their AlON phases could be well describedby the equation: a0=0.7900+0.0375[MgO]+0.015[AlN](nm)

  12. Oxidation Behaviour of Sputtered Ni-3Cr-20Al Alloy

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    The oxidation behavior of sputtered Ni-3Cr-20Al coating at 900°C in air was investigated. A dense Al2O3 layer was formed on the sputtered Ni-3Cr-20Al coating after 200 h oxidation.However, owing to the segregation of Ni3Al during oxidation Focess at high temperature, the spinel NiAl2O4 was also formed in the Al2O3 layer. It was found that the formation of NiAl2O4had no detrimental effect on the oxidation resistance of the sputtered Ni-3Cr-20Al coating due to the excellent adhesion shown by the Al2O3 and NiAl2O4 complex oxide scale.

  13. Environmental embrittlement of intermetallic compounds in Fe-Al alloys

    Institute of Scientific and Technical Information of China (English)

    张建民; 张瑞林; S.H.YU; 余瑞璜

    1996-01-01

    First,it is proposed that hydrogen atoms occupy the interstitial sites in Fe3Al and FeAl.Then the environmental embrittlement of intermetallic compounds in Fe-Al alloys is studied in the light of calculated valence electron structures and bond energy of Fe3Al and FeAl containing hydrogen atoms.From the analyses it is found that the states of metal atoms will change,in which more lattice electrons will become covalent electrons to bond with hydrogen atoms when the atomic hydrogen diffuses into the intermetallic compounds in Fe-Al alloys,which will result in the decrease of local metallicity in Fe3Al and FeAl.Meanwhile,it is found that the crystal will easily cleave since solute hydrogen bonds with metal atoms and severely anisotropic bonds form.As a conclusion,these factors result in the environmental embrittlement of Fe3Al and FeAl.

  14. Electrochemical corrosion behavior of arc sprayed Zn-Al coatings

    Institute of Scientific and Technical Information of China (English)

    LIU Yan; ZHU Zi-xin; CHEN Yong-xiong; XU Bin-shi; MA Shi-ning; LI Zhuo-xin

    2004-01-01

    Cored wires and high velocity arc spraying (HVAS) technique were applied to produce high Al content Zn-Al alloy coatings on low carbon steel substrates. The electrochemical corrosion behaviors of Zn, Al and Zn-Al coatings were studied with potentiodynamic measurement in 5 % NaCl solution. Compared with pure Zn, pure Al and Zn-15Al coatings, Zn-26Al coatings show a higher corrosion resistance in salt solution. The potentiodynamic polarization tests show that the corrosion resistance of Zn-Al coatings increases as Al content is raised. Pure Al coating exhibits different electrochemical behaviors with other coatings. The corrosion initiated at the micro-pores of the coating and the underlying corrosion mechanism is very similar to that of the pitting corrosion.

  15. Properties of porous FeAlO/FeAl ceramic matrix composite influenced by mechanical activation of FeAl powder

    Indian Academy of Sciences (India)

    V Usoltsev; S Tikhov; A Salanov; V Sadykov; G Golubkova; O Lomovskii

    2013-12-01

    Porous ceramic matrix composites FeAlO/FeAl with incorporated metal inclusions (cermets) were synthesized by pressureless method, which includes hydrothermal treatment of mechanically alloyed FeAl powder followed by calcination. Their main structural, textural and mechanical features are described. Variation of FeAl powder alloying time results in non-monotonous changes of the porosity and mechanical strength. Details of the cermet microstructure and its relation to the mechanical properties are discussed.

  16. Observable Proxies For 26 Al Enhancement

    Energy Technology Data Exchange (ETDEWEB)

    Fryer, Christopher L [Los Alamos National Laboratory; Young, Patrick A [Los Alamos National Laboratory; Ellinger, Carola I [ASU; Arnett, William D [UNIV ARIZONA

    2008-01-01

    We consider the cospatial production of elements in supernova explosions to find observationally detectable proxies for enhancement of {sup 26}Al in supernova ejecta and stellar systems. Using four progenitors we explore a range of 1D explosions at different energies and an asymmetric 3D explosion. We find that the most reliable indicator of the presence of {sup 26}Al in unmixed ejecta is a very low S/Si ratio ({approx} 0.05). Production of N in O/S/Si-rich regions is also indicative. The biologically important element P is produced at its highest abundance in the same regions. Proxies should be detectable in supernova ejecta with high spatial resolution multi wavelength observations, but the small absolute abundance of material injected into a proto-planetary disk makes detection unlikely in existing or forming stellar/planetary systems.

  17. Forging of FeAl intermetallic compounds

    Energy Technology Data Exchange (ETDEWEB)

    Flores, O.; Juarez, J.; Campillo, B.; Martinez, L. [UNAM, Cuernavaca (Mexico). Lab. de Cuernavaca; Schneibel, J.H. [Oak Ridge National Lab., TN (United States)

    1994-09-01

    Much activity has been concentrated on the development of intermetallic compounds with the aim of improving tensile ductility, fracture toughness and high notch sensitivity in order to develop an attractive combination of properties for high and low temperature applications. This paper reports experience in processing and forging of FeAl intermetallic of B2 type. During the experiments two different temperatures were employed, and the specimens were forged after annealing in air, 10{sup {minus}2} torr vacuum and argon. From the results it was learned that annealing FeAl in argon atmosphere prior to forging resulted in better deformation behavior than for the other two environments. For the higher forging temperature used in the experiments (700C), the as-cast microstructure becomes partially recrystallized.

  18. Ni{sub 3}Al technology transfer

    Energy Technology Data Exchange (ETDEWEB)

    Sikka, V.K.; Santella, M.L.; Alexander, D.J. [Oak Ridge National Laboratory, TN (United States)] [and others

    1995-05-01

    Ductile Ni{sub 3}Al and Ni{sub 3}Al-based alloys have been identified for a range of applications. These applications require the use of material in a variety of product forms such as sheet, plate, bar, tubing, piping, and castings. Although significant progress has been made in the melting, casting, and near-net-shape forming of nickel aluminides, some issues still remain. These include the need for (1)high-strength castable composition for turbochargers, furnace furniture, and hot-die applications; (2) castability (fluidity, hot-shortness, porosity, etc.); (3) weld reparability of castings; and (4) hot fabricability of cast ingots. All of the issues listed above can be {open_quotes}show stoppers{close_quotes} for the commercial application of nickel aluminides. This report describes work completed to address some of these issues during the fourth quarter of FY 1994.

  19. Ni{sub 3}Al technology transfer

    Energy Technology Data Exchange (ETDEWEB)

    Sikka, V.K.; Viswanathan, S.; Santella, M.L. [Oak Ridge National Lab., TN (United States)] [and others

    1997-04-01

    Ductile Ni{sub 3}Al and Ni{sub 3}Al-based alloys have been identified for a range of applications. These applications require the use of material in a variety of product forms such as sheet, plate, bar, wire, tubing, piping, and castings. Although significant progress has been made in the melting, casting, and near-net-shape forming of nickel aluminides, some issues still remain. These include the need for: (1) high-strength castable composition for many applications that have been identified; (2) castability (mold type, fluidity, hot-shortness, porosity, etc.); (3) weld reparability of castings; and (4) workability of cast or powder metallurgy product to sheet, bar, and wire. The four issues listed above can be {open_quotes}show stoppers{close_quotes} for the commercial application of nickel aluminides. This report describes the work completed to address some of these issues during FY 1996.

  20. Communication Support for People with ALS

    Directory of Open Access Journals (Sweden)

    David Beukelman

    2011-01-01

    Full Text Available Almost all people with amyotrophic lateral sclerosis (ALS experience a motor speech disorder, such as dysarthria, as the disease progresses. At some point, 80 to 95% of people with ALS are unable to meet their daily communication needs using natural speech. Unfortunately, once intelligibility begins to decrease, speech performance often deteriorates so rapidly that there is little time to implement an appropriate augmentative and alternative communication (AAC intervention; therefore, appropriate timing of referral for AAC assessment and intervention continues to be a most important clinical decision-making issue. AAC acceptance and use have increased considerably during the past decade. Many people use AAC until within a few weeks of their deaths.

  1. Hydrogen diffusion in Al-Li alloys

    Science.gov (United States)

    Anyalebechi, P. N.

    1990-08-01

    The diffusion coefficients of hydrogen in binary Al-Li alloys containing 1,2, and 3 wt pct Li have been determined from desorption curves of samples saturated with hydrogen at 473 to 873 K. Within this temperature range, the diffusivity of hydrogen in the binary Al-Li alloys investigated has an Arrhenius-type temperature dependence and follows the equation of the general form D = DT) where D 0exp(-Q/R is the diffusion coefficient (m2/s), D 0 is the preexponential or frequency factor (m2/s), R is the gas constant (J/K mol), Q is the activation energy (J/mol), and T is absolute temperature (K). The rate of diffusion of hydrogen in aluminum decreases with increase in lithium additions. This is provisionally attributed to the stronger local binding energy between hydrogen and lithium atoms in the aluminum metal lattice.

  2. Spherical foam growth in Al alloy melt

    Institute of Scientific and Technical Information of China (English)

    SHANG; Jintang; HE; Deping

    2005-01-01

    Due to the demand of high-tech Al alloy foam with spherical pores, high strength and high energy-absorption capacity has become one of the research foci. The aim of this study is to ascertain the growth regularity of spherical foam in Al alloy melt. Three-dimensional packing model such as face-centered cubic is established to study the spherical foam growth. Theoretical results are compared with experimental ones, and the face-centered cubic model corresponds well with the experiment. It is reasonable to assume that the pores have the same radius, the total pore number keeps unchanged and spherical foam grows with face-centered cubic packing mode. This study presents a useful help to control the average pore radius and film thickness.

  3. [Communication with ALS patients: neurosurgical approach].

    Science.gov (United States)

    Yoshimine, Toshiki; Yanagisawa, Takufumi; Sawada, Jin-Ichi; Hazama, Takanori; Mochizuki, Hideki; Hirata, Masayuki

    2013-01-01

    By progression of the disease, motor neurons degenerate in patients with amyotrophic lateral sclerosis (ALS) eventually lose nearly all voluntary muscles in the body. They are awake and aware but cannot move or communicate (locked-in state). Since the function of the brain is preserved, one possible measure to support their communication is to interpret their motor intention by decoding (deciphering) brain signals and present it with external devices. This technology called "brain-machine interface (BMI)" is now close to clinical use in Japan and USA.In our system, we record electrocorticogram (ECoG) obtained with subudural electrodes during their motor imagery, decode it and determine the movement they intended. So far, one patient of ALS with severe paralysis, implanted with this electrodes, successfully operated the PC communication tool only by thinking.

  4. Status of the AlCap experiment

    CERN Document Server

    Litchfield, R Phillip

    2015-01-01

    The AlCap experiment is a joint project between the COMET and Mu2e collaborations. Both experiments intend to look for the lepton-flavour violating conversion $\\mu + A \\rightarrow e + A$, using tertiary muons from high-power pulsed proton beams. In these experiments the products of ordinary muon capture in the muon stopping target are an important concern, both in terms of hit rates in tracking detectors and radiation damage to equipment. The goal of the AlCap experiment is to provide precision measurements of the products of nuclear capture on Aluminium, which is the favoured target material for both COMET and Mu2e. The results will be used for optimising the design of both conversion experiments, and as input to their simulations. Data was taken in December 2013 and is currently being analysed.

  5. The Byzantines in Medieval Arabic Poetry: Abu Firas’ "Al-Rumiyyat" and the Poetic Responses of al-Qaffal and Ibn Hazm to Nicephore Phocas’ "Al-Qasida al-Arminiyya al-Malʿuna" (The Armenian Cursed Ode

    Directory of Open Access Journals (Sweden)

    Nizar F. HERMES

    2009-10-01

    Full Text Available Up until the Crusades, it was al-Rūm who were universally seen by Arab writers and Arab poets in particular as the Other par excellence. Nowhere is this more conspicuous than in the sub-genre of Al-Rūmiyyat (poems about the Byzantines, namely as found in the Rūmiyyat of Abu Firas al-Hamdani(d.968, and in the poetic responses of al-Qaffal(d. 946 and Ibn Hazm(d. 1064 to what was described by several medieval Muslim chronicles as Al-Qasida al-Arminiyya al-Malʿuna (The Armenian Cursed Ode. By exploring the forgotten views of the Byzantines in medieval Arabic poetry, this article purports to demonstrate that contrary to the impression left after reading Edward Said’s groundbreaking Orientalism: Western Conceptions of the Orient (1978 and other postcolonial studies, Orientals have not existed solely to be ‘orientalized’. Perhaps even before this came to be so, they too had ‘occidentalized’ their Euro-Christian Other(s in a way that mirrored in reverse the subject/object relationship described as Orientalism.

  6. KISAH DZULQARNAIN DALAM AL-QUR’AN SURAT AL-KAHFI: 83-101 (Pendekatan Hermeneutik

    Directory of Open Access Journals (Sweden)

    Rukimin Rukimin

    2016-06-01

    ingkar hendaknya diajak bertobat dan kembali kepada keimanan dengan diperingatkan akan kekufurannya bahwa Allah akan mengazab orang-orang yang ingkar. Kata Kunci: Dzhulqarnai; al-Qu’an; hermeneutika

  7. Fabrication and properties of functionally graded NiAl/Al2O3 composites

    Science.gov (United States)

    Miller, D. P.; Lannutti, J. J.; Noebe, R. D.

    1993-01-01

    A modified sedimentation process was used in the production of a functionally gradient material (FGM), NiAl/Al2O3. A simple finite element model was used to guide our design and fabrication efforts by estimating residual stress states as a function of composite structure. This approach could lead to tailored designs that enhance or avoid specific residual stress states. Thermal cycling tests were factored into the model to predict time dependent or steady-state internal temperature and stress profiles. Four-point bend tests were conducted to establish the mechanical load-displacement behavior of a single interlayer FGM at room temperature, 800 and 1000 K. Room temperature bend strength of the FGM was 3-4 times that of the base NiAl. At elevated temperatures, composite fracture occurred in a gradual, noncatastrophic mode involving NiAl retardation of a succession of cracks originating in the alumina face.

  8. Fabrication of high-quality submicron Nb/Al-AlOx/Nb tunnel junctions

    Institute of Scientific and Technical Information of China (English)

    Yu Hai-Feng; Cao Wen-Hui; Zhu Xiao-Bo; Yang Hai-Fang; Yu Hong-Wei; Ren Yu-Feng; Gu Chang-Zhi; Chen Geng-Hua; Zhao Shi-Ping

    2008-01-01

    Nb/Al-AlOx/Nb tunnel junctions are often used in the studies of macroscopic quantum phenomena and supercon-ducting qubit applications of the Josepheon devices. In this work, we describe a convenient and reliable process using electron beam lithography for the fabrication of high-quality, submicron-sized Nb/Al-AlOx/Nb Josephson junctions.The technique follows the well-known selective Nb etching process and produces high-quality junctions with Vm=100 mV at 2.3 K for the typical critical current density of 2.2 kA/cm2, which can be adjusted by controlling the oxygen pressure and oxidation time during the formation of the tunnelling barrier. We present the results of the temperature depen-dence of the sub-gap current and in-plane magnetic-field dependence of the critical current, and compare them with the theoretical predictions.

  9. Effect of partial melting on superplasticity ofAlNp/6061Al composite

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    AlN particulate reinforced 6061 aluminum alloy composite was fabricated by powder metallurgy method and hot-rolled after extrusion. Tensile strength and elongation at elevated temperature were measured by tensile test at initial strain rates between 10-2 s-1 and 100 s-1. The AlNp/6061Al composite exhibits an m-value of 0.42 and a maximum elongation of 450% at 863?K. Differential scanning calorimeter was used to ascertain the possibility of any partial melting in the vicinity of optimum superplastic temperature. Partial melting resulting from solute segregation at interfaces has much influence on superplasticity of the composite. It is postulated that AlNp/matrix interface sliding occurs along with grain boundary in superplastic deformation.

  10. Adherent Al2O3 scales produced on undoped NiCrAl alloys

    Science.gov (United States)

    Smialek, James L.

    1986-01-01

    Repeated oxidation and polishing of high purity Ni-15Cr-13Al has dramatically changed its cyclic oxidation behavior from nonadherent to adherent. No apparent change in scale phase, morphology or interface structure occurred during this transition, dismissing any mechanism based on pegging, vacancy sink, or growth stress. The principle change that did occur was a reduction in the sulfur content from 10 ppmw to 3 ppmw after 25 cycles at 1120 C. These observations are used to support the model of Al2O3 scale adherence put forth by Smeggil et al. which claims that Al2O3 scale spallation occurs due to sulfur segregation and bond deterioration at the oxide-metal interface.

  11. Fabrication Of Al 2024/SiC Nanocomposite with Al and Cu Pure Coatings

    Directory of Open Access Journals (Sweden)

    P. Melali

    2015-06-01

    Full Text Available Composites find an important place as new advanced materials in last decades; those especially produced with nanoparticles reinforcements, attracts researchers and a number of researches were executed on this topic. In this study, Al-base 2024 alloy composites reinforced with SiC nanoparticles were fabricated and the effects of two different coating materials were investigated. Coatings were pure Al and Cu powder with constant grain particle size. The results show that the Al coating has impacts on grain size and the interface layer between reinforcement and matrix. The mechanism of formation of interface layer between SiC nanoparticles and the Al-base 2024 matrix with reinforced with Cu coated SiC particles is quite different.

  12. Die Welt als Puppenhaus. Die verzauberten Filme des Wes Anderson als Retrospektive im Kino Xenix

    OpenAIRE

    Binotto, Johannes

    2012-01-01

    Nur gerade sieben Filme hat der Regisseur und Autor Wes Anderson bisher gemacht, damit aber ein einzigartiges Œuvre geschaffen. Das Xenix zeigt diese melancholischen und verspielten Kunstwerke, zusammen mit Filmen, die als Inspiration dienten.

  13. 77 FR 73732 - In the Matter of the Amendment of the Designation of al-Qa'ida in Iraq, aka Jam'at al Tawhid wa...

    Science.gov (United States)

    2012-12-11

    ... Designation of al-Qa'ida in Iraq, aka Jam'at al Tawhid wa'al-Jihad, aka The Monotheism and Jihad Group, aka The al-Zarqawi Network, aka al-Tawhid, aka Tanzim Qa`idat al-Jihad fi Bilad al-Rafidayn, aka The Organization of al-Jihad's Base of Operations in Iraq, aka al-Qaida of Jihad in Iraq, aka al-Qaida in Iraq,...

  14. 77 FR 4083 - Amendment of the Designation of al-Qa'ida in Iraq, et al. as a Specially Designated Global...

    Science.gov (United States)

    2012-01-26

    ..., aka Jam'at al Tawhid wa'al-Jihad, aka The Monotheism and Jihad Group, aka The al-Zarqawi Network, aka al-Tawhid, aka Tanzim Qa`idat al-Jihad fi Bilad al-Rafidayn, aka The Organization of al- Jihad's Base of Operations in Iraq, aka al-Qaida of Jihad in Iraq, aka al-Qaida in Iraq, aka al-Qaida...

  15. Entspannung als Wirkfaktor in der manuellen Stimmbehandlung

    OpenAIRE

    Lehnert, B.; Schlasze, H; Siebertz, S; Neuschaefer-Rube, C

    2010-01-01

    Hintergrund: Verschiedene Studien sprechen für eine Wirksamkeit der Manuellen Therapien (z. B. Osteopathie) nicht nur bei der sog. "Zervikogenen Dysphonie", sondern auch bei hyperfunktionellen Dysphonien. Unsere klinische Erfahrung zeigt, dass Patienten eine manuelle Behandlung der HWS als sehr entspannend empfinden. Uns sind keine Arbeiten bekannt, die den Anteil dieser allgemeinen Entspannung am Behandlungserfolg der Manuellen Therapien untersuchen. Wir stellen eine erste Studie zum Vergle...

  16. Psychosocial adjustment to ALS: a longitudinal study

    Directory of Open Access Journals (Sweden)

    Tamara eMatuz

    2015-09-01

    Full Text Available For the current study the Lazarian stress-coping theory and the appendant model of psychosocial adjustment to chronic illness and disabilities (Pakenham 1999 has shaped the foundation for identifying determinants of adjustment to ALS. We aimed to investigate the evolution of psychosocial adjustment to ALS and to determine its long-term predictors. A longitudinal study design with four measurement time points was therefore, used to assess patients’ quality of life, depression, and stress-coping model related aspects, such as illness characteristics, social support, cognitive appraisals and coping strategies during a period of two years. Regression analyses revealed that 55% of the variance of severity of depressive symptoms and 47% of the variance in quality of life at T2 was accounted for by all the T1 predictor variables taken together. On the level of individual contributions, protective buffering and appraisal of own coping potential accounted for a significant percentage in the variance in severity of depressive symptoms, whereas problem management coping strategies explained variance in quality of life scores. Illness characteristics at T2 did not explain any variance of both adjustment outcomes. Overall, the pattern of the longitudinal results indicated stable depressive symptoms and quality of life indices reflecting a successful adjustment to the disease across four measurement time points during a period of about two years.Empirical evidence is provided for the predictive value of social support, cognitive appraisals, and coping strategies, but not illness parameters such as severity and duration for adaptation to ALS. The current study contributes to a better conceptualization of adjustment, allowing us to provide evidence-based support beyond medical and physical intervention for people with ALS.

  17. The beta-decay of Al-22

    NARCIS (Netherlands)

    Achouri, NL; Santos, FDO; Lewitowicz, M; Blank, B; Aysto, J; Canchel, G; Czajkowski, S; Dendooven, P; Emsallem, A; Giovinazzo, J; Guillet, N; Jokinen, A; Larid, AM; Longour, C; Perajarvi, K; Smirnova, N; Stanoiu, M

    2006-01-01

    In an experiment performed at the LISE3 facility of GANIL, we studied the decay of Al-22 produced by the fragmentation of a Ar-36 primary beam. A beta-decay half-life of T-1/2 = 91.1 +/- 0.5ms was measured. The beta-delayed one- and two-proton emission as well as beta-alpha and beta-delayed gamma-de

  18. Response to de la Iglesia et al.

    Science.gov (United States)

    Yetish, Gandhi; Kaplan, Hillard; Gurven, Michael; Wood, Brian; Pontzer, Herman; Manger, Paul R; Wilson, Charles; McGregor, Ronald; Siegel, Jerome M

    2016-04-01

    We wish to respond to the commentary of de la Iglesia et al. [1]. Studies comparing sleep in different communities have different goals. One frequent goal has been to determine how sleep is affected by manipulating specific 'modern' conditions. Many studies have investigated the effect of artificial light and electronic entertainment. Such studies have clearly shown that light, particularly blue light, delays sleep onset [2]. Studying the effect of artificial light on sleep was not a goal of our study.

  19. Thermodynamic characterization of NiAl

    Energy Technology Data Exchange (ETDEWEB)

    Alexander, C.A. [Battelle, 505 King Avenue, Columbus, OH 43201 (United States)], E-mail: alexandc@Battelle.org; Ogden, J.S.; Risser, S.M.; Wood, Van E. [Battelle, 505 King Avenue, Columbus, OH 43201 (United States)

    2009-05-15

    Thermodynamic properties of the high-stability intermetallic compound nickel aluminide, NiAl, have been determined from mass-spectrometric, weight-loss effusion, and calorimetric measurements, using samples from a single preparation with a composition determined to be Ni{sub 0.986}Al{sub 1.014}. Per mole of NiAl molecules, the specific heat capacity at room temperature of 298 K is 48.54 J . K{sup -1} . mol{sup -1}, with a linear temperature dependence of +0.0104 J . K{sup -2} . mol{sup -1}. At the same temperature, the enthalpy of formation is -133.7 kJ . mol{sup -1}, the entropy is about 53.8 J . K{sup -1} . mol{sup -1} and the enthalpy difference between room temperature and absolute zero is 7.97 kJ . mol{sup -1}. The Gibbs free-energy is -130.2 kJ . mol{sup -1} at T = 298 K, with a linear temperature dependence of +5.04 J . K{sup -1} . mol{sup -1}. The Debye temperature is 452 K, while the electronic density-of-states at the Fermi-level is about 0.29 states per eV-atom. The NiAl{sup +} ions were observed in the high-temperature mass spectra. Pressures for the gas at these temperatures were estimated and used with the results of quantum-mechanical calculations of total energy, specific heat, and entropy to calculate free-energy functions for the gas. These and additional results are compared with other measurements and discussed in terms of current theories of the electronic and structural properties of the compound.

  20. Crítica al funcionalismo normativista

    OpenAIRE

    2010-01-01

    El artículo gira en torno al modelo de pensamiento del funcionalismo «normativista» formulado por Günther Jakobs y de las bases metodológicas que han hecho desembocar su teoría de la pena en el ambiguo concepto del llamado «derecho penal del enemigo» como teoría de la excepción penal.

  1. Globale Entwikclung als Lernbereich in den Naturwissenschaften

    OpenAIRE

    Härtig, Hendrik; Bernholt, Sascha; Schroeter, Burkhard

    2014-01-01

    Mit dem Orientierungsrahmen für den Lernbereich Globale Entwicklung wurden Anregungen gegeben, die Themen nachhaltige Entwicklung und globale Entwicklung im Unterricht in allen Schulfächern aufzugreifen. Die drei naturwissenschaftlichen Schulfächer Biologie, Chemie und Physik haben sich bislang sehr unterschiedlich auf das Thema eingelassen. In der Biologiedidaktik finden sich sowohl Forschungsarbeiten als auch Unterrichtsvorschläge; für Chemie und insbesondere Physik existieren hingegen nur ...

  2. Influence of AlF3 and hydrothermal conditions on morphologies of α-Al2O3

    Institute of Scientific and Technical Information of China (English)

    FU Gao-feng; WANG Jing; KANG Jian

    2008-01-01

    Homogeneous α-Al2O3 platelets were synthesized by introducing AlF3 to alumina precursor.The effects of AlF3 additive on the phase transformation and morphology of the prepared α-Al2O3 platelets were investigated.The results show that a single phase of α-Al2O3 with an average particle size of 8μm can be obtained at 900℃ with 2% AlF3 additive.The transformation temperature decreasing IS attributed to introduction of Al3+ vacancy and to the formation of intermediate compound of AlOF,which is considered to accelerate the mass transportation from transitional Al2O3 to α-Al2O3.AlF3 concentration and hydrothermal temperature can also affect the morphology of α-Al2O3.When hydrothermal temperature is 120℃,the morphology of α-Al2O3 transforms from irregular to flat hexangular platelet with increasing AlF3 concentration.As hydrothermal temperature increases,the morphology of α-Al2O3 with 2% AlF3 additive changes from polyhedron to hexangular platelet and then to vermicular.

  3. ALS1 and ALS3 gene expression and biofilm formation in Candida albicans isolated from vulvovaginal candidiasis

    Directory of Open Access Journals (Sweden)

    Shahla Roudbarmohammadi

    2016-01-01

    Conclusion: The results attained indicated that there is an association between the expression of ALS1 and ALS3 genes and fluconazole resistance in C. albicans. A considerable percent of the isolates expressing the ALS1 and ALS3 genes may have contributed to their adherence to vagina and biofilm formation.

  4. Fracture toughness of Al-4%Mg/Al{sub 2}O{sub 3}p composites

    Energy Technology Data Exchange (ETDEWEB)

    Pestes, R.H. [Hewlett-Packard, Camus, WA 98607 (United States); Kamat, S.V. [Mechanical and Materials Engineering Department, Washington State University, Pullman, WA 99164-2920 (United States); Hirth, J.P. [Mechanical and Materials Engineering Department, Washington State University, Pullman, WA 99164-2920 (United States)

    1994-12-20

    Fracture toughness tests were carried out on Al-4%Mg/Al{sub 2}O{sub 3}p composites containing different sizes and volume fractions of alumina particulates. The results indicated that the fracture toughness was dependent on the interparticle spacing provided the particulate size was below a critical size. The critical particle size corresponds to the situation wherein the energy release rate on particulate cracking is sufficient to trigger dynamic unstable crack extension. ((orig.))

  5. „Der Islam begann als Fremder, und als Fremder wird er wiederkehren“

    DEFF Research Database (Denmark)

    Riexinger, Martin Thomas

    2015-01-01

    Muḥammad b. ʿAbd al-Wahhāb embeds in his Mukhtaṣar sīrat al-rasūl the biography of Muḥammad in an overarching vision of history that begins with Adam and ends in the Mongol period. In this cyclical concept the promulgation of Islam is followed by a relapse into shirk due to misdirected piety...

  6. Magnetism of UPtAl and UIrAl; LDA+U calculations

    Energy Technology Data Exchange (ETDEWEB)

    Rusz, Jan [Department of Electronic Structures, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, 121 16 Prague 2 (Czech Republic)]. E-mail: rusz@mag.mff.cuni.cz; Divis, Martin [Department of Electronic Structures, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, 121 16 Prague 2 (Czech Republic)

    2005-04-15

    We report on electronic structure calculations of UPtAl and UIrAl ternary uranium based intermetallic compounds. Calculations were performed in the framework of density functional theory using LDA+U exchange correlation potential. Full relaxation of U and J parameters was performed with the aim of obtaining correct total magnetic moments on uranium site. These parameters are then used in subsequent analysis of magnetic moments (including spin and orbital components) and hybridization effects.

  7. Liquidus Temperatures of System Na3AlF6-K3AlF6-AlF3 for Aluminum Electrolysis at Lower Temperature

    Institute of Scientific and Technical Information of China (English)

    WEI Chen-juan; LAI Yan-qing; LI Jie; TIAN Zhong-liang; WANG Jia-wei; ZOU Zhong; LIU Ye-xiang

    2011-01-01

    Liquidus temperatures in the molten salt system Na3AlF6-K3AlF6-AlF3 of interest for aluminum electrolysis were determined by thermal analysis method.The results were presented and an empirical equation describing liquidus temperatures for primary crystallization was derived t=1003.5-0.081 ×A2.3159-5.87×B0.657-0.024×A2.22×B1.14+0.035×A2.17×B1.084,where t is the liquidus temperature in degree Celsius,A denotes the mass fraction of AlF3 in system Na3AlF6-K3AlF6-AlF3,and B denotes K3A1F6/(Na3AlF6+K3AlF6)in mass(%,the value was defined as KR in this paper).The composition limitations are 0<w(AlF3)<30%,and 0<KR<50%.The isothermal diagram of molten salt system Na3AlF6-K3A1F6-AlF3 was obtained in this composition limitation.

  8. In-situ Synthesis of Ti3AlC2/TiC-Al2O3 Composite from TiO2-Al-C System

    Institute of Scientific and Technical Information of China (English)

    Jixin CHEN; Jialin LI; Yanchun ZHOU

    2006-01-01

    Ti3AlC2/TiC-Al2O3 composite was synthesized by a combustion reaction in TiO2-Al-C system. The effect of the compositions in raw materials on the products was investigated. Ti3AlC2/TiC-Al2O3 composite was obtained at the molar ratio of TiO2:Al:C=3.0:5.0~5.1:1.8~2.0. The reaction path for the 3TiO2-5Al-2C system was proposed. Al3Ti, Ti2O3, TiO, and δ-Al2O3 are found to be transitional phases. Finally,Ti3AlC2/TiC-Al2O3 composite forms at ~900℃ of furnace temperature. The measured Vickers hardness,fracture toughness, and flexural strength of the nearly dense sample from 3TiO2-5Al-2C are 13.3±1.1 GPa,5.8±0.3 MPa.m1/2, and 466±39 MPa, respectively.

  9. L'Hemisferic: Una ventana al mundo

    Directory of Open Access Journals (Sweden)

    Calatrava Valls, Santiago

    2000-12-01

    Full Text Available The "Hemisféric-Planetario" building is located in the center line East-West of the "Ciudad de las Artes y las Ciencias" complex, flanked by two rectangular lakes, in the north and in the south, respectively. In the East side we can find a promenade between the Museum and its south lake. Nevertheless its West side is virtual. and located in the area of the "Hermanos Marista 's" viaducto The building is visited, daily, by about 3.000 people, distributed between its 8 duties. The showing room holds 321 seats, four of those for wheel-chairs. The building has a possible room of 999 people (at the same time.El edificio Hemisféric-Planetarío está situado sobre el eje Este-Oeste del complejo de la Ciudad de las Artes y las Ciencias; está flanqueado por dos estanques rectangulares, al Norte y al Sur, respectivamente. Por el Este, un paseo limita la parcela con el Museo y su estanque Sur. El limite Oeste, sin embargo. es virtual y se encuentra en la proyección del viaducto de Hermanos Maristas. Este edificio es visitado diariamente por unos 3.000 personas, distribuyéndose en 8 funciones. La sala de proyección dispone de 321 butacas, con posibilidad de alojar 4 sillas de ruedas. La capacidad de acogida del edificio (al mismo tiempo es de 999 personas.

  10. Diet and dietetics in al-Andalus.

    Science.gov (United States)

    Salas-Salvadó, Jordi; Huetos-Solano, Maria D; García-Lorda, Pilar; Bulló, Mònica

    2006-08-01

    Al-Andalus society (711-1492) based its idea of health on the wisdom of Classical Greece, the Hippocratic-Galenic theories, as well as the Persian and Hindu cultures. The twelfth century in al-Andalus is considered to be the most prolific period for works of a scientific and technical nature. At the time, the main treatises on dietetics were written and this science reached its widest expression with such leading figures as Ibn Wāfīd, Avenzoar, Averroes and Maimonides, whose works revealed the first scientific knowledge on the nutritional processes of the human body. Diet was regarded as being essential for health and the prevention of disease. Dietary guidelines were written for different age groups, different body types and different seasons of the year. The amount of food to be ingested, the number of meals recommended and the order in which the food should be consumed were all issues that were discussed. A variety of foods were thought to have medicinal properties, some of which are known today. The diet in al-Andalus was varied and very probably made a substantial contribution to the origin of the present-day Mediterranean diet, rich in olive oil, wholemeal cereals, fruit and vegetables, fish, lamb, poultry, nuts and spices. We also find that many of the terms in current use in diet and agriculture are a living testimony to the Arabic influence, as are many of the dishes of our varied Mediterranean gastronomy.

  11. Keanekaragaman dalam al-Qur’an

    Directory of Open Access Journals (Sweden)

    Muhammad Chirzin

    2011-04-01

    Full Text Available The diversity of race, language, class, and culture is a wealth; basically, it is a beautiful gift in this life. However, the reality is precesely the social conflict among the society. This article explores the issue of diversity contained in al Qur’an. Some of the key themes included: diversity as sunnatullah, diversity in unity, religious and ethnic diversity, and diversity of professions. Al Qur’an has mentioned several groups of religious believers and provided guidance association order among religious believers. Religious diversity certainly makes Muslim necessitates acknowledging and respecting other religion save Islam. Al Qur’an has mentioned also a variety of occupations based on interests, talents, expertise, and particular skills. The fragmentation and understanding diversity have caused by egoism and truth claiming of each group and individual, but no one has knowledge covering everything from different sides or corners. Above all knowledge is the Almighty owner off all knowledge. With feeling most true someone or group tends to feel the best and have the right to insult any others. That is the base of the dispute and spiritual decline. Mukmin has to preserve the noble character in association, and keep away from bad manner. Among mukmin must love each other and maintain good manners. Finally, this study is intended to promote the establishment of harmony, peace and happiness of living together.

  12. Resistencia al esfuerzo cortante en rellenos sanitarios

    Directory of Open Access Journals (Sweden)

    Eimar Andrés Sandoval-Vallejo

    2015-01-01

    Full Text Available Los rellenos sanitarios son obras ingenieriles conformadas con un material específico, cuyas propiedades de resistencia al cor te pueden determinarse de manera similar a la de un material geotécnico. Este artículo presenta resultado s de un programa experimental r ealizado con el fin de obtener los paráme tros de resistencia al corte de l relleno sanitario Presidente en el Valle del Cauca (Colombia . El programa experimental involucró ensayos d e corte directo no consolidado no drenado (UU sobre muestras reconstituidas en laboratorio. L a variación del ángulo de fricción interna y de la cohesión, como una funci ón del peso específico, profundidad, y tiempo de descomposición del relleno fue evaluada. También se compararon los resu ltados con valores internacionales usados para diseñ o. Los resultados mostraron un a marcada influencia del tiempo de descom posición en la resistencia al co rte. También se encontró ciert a dependencia con la profundidad. Los parámetros de resistencia obtenidos se encuentran dentro de ran gos internacionales recomendados para diseño.

  13. Thermodynamic properties and mixing thermodynamic parameters of Ba-Al, Mg-Al, Sr-Al and Cu-Al metallic melts

    Institute of Scientific and Technical Information of China (English)

    张鉴

    2004-01-01

    Application of equations of mixing thermodynamic parameters formulated on the basis of the coexistence theory of metallic melts in Ba-Al, Mg-Al, Sr-A1 and Cu-Al melts leads to fruitful results that not only the evaluated mass action concentrations agree well with the measured activities, but also the calculated mixing thermodynamic parameters are quite coincident with the experimental values. Moreover, the calculated mass action concentrations strictly obey the mass action law. The evaluated mixing thermodynamic parameters have very fine regularity: the mixing free energy is composed of standard free formation energies of all compounds and chemical potentials of all structural units at equilibrium; the mixing enthalpy consists of standard formation enthalpies of all compounds; the mixing entropy is composed of standard entropies of all compounds and configuration entropies of all structural units at equilibrium. As the equations of mixing thermodynamic parameters formulated are widely applicable to metallic melts involving compound formation, they can be used as the second practical criterion to determine whether thermodynamic models of metallic melts are correctly formulated.

  14. Studies on Al Kidirate and Kapoeta meteorites

    Energy Technology Data Exchange (ETDEWEB)

    Gismelseed, A.M. [Sudan Atomic Energy Commission, Khartoum (Sudan); Khangi, F. [Sudan Atomic Energy Commission, Khartoum (Sudan); Ibrahim, A. [Sudan Atomic Energy Commission, Khartoum (Sudan); Yousif, A.A. [Coll. of Science, Sultan Qaboos Univ., Alkhoud (Oman); Worthing, M.A. [Coll. of Science, Sultan Qaboos Univ., Alkhoud (Oman); Rais, A. [Coll. of Science, Sultan Qaboos Univ., Alkhoud (Oman); Elzain, M.E. [Coll. of Science, Sultan Qaboos Univ., Alkhoud (Oman); Brooks, C.K. [Coll. of Science, Sultan Qaboos Univ., Alkhoud (Oman); Sutherland, H.H. [Coll. of Science, Sultan Qaboos Univ., Alkhoud (Oman)

    1994-11-01

    Moessbauer spectroscopy (20-300 K), magnetic susceptibility measurements (77-350 K), scanning electron microscopy and X-ray diffraction experiments have been performed on two meteorite samples: one from an old fall (Kapoeta) and another from a very recent fall (Al Kidirate). The two specimens differ in their mineralogy. Chondrules appear to be absent in Kapoeta and it is probably a pyroxene-plagioclase achondrite with ferrohypersthene as the most abundant mineral. On the other hand, the Al Kidirate meteorite is an ordinary chondrite and the specimen consists of olivine, orthopyroxene, troilite and kamacite. The Moessbauer measurements confirm the above characterization, showing a paramagnetic doublet for the Kapoeta sample and at least two paramagnetic doublets and magnetic sextets for the Al Kidirate specimens. The former were assigned to Fe in pyroxene sites, while the latter was assigned to Fe in pyroxene, olivine, Fe-S and Fe-Ni alloys. The difference in the mineralogy of the two meteorites has also been reflected in the temperature-dependent magnetic susceptibility. The magnetization and the hyperfine interaction parameters will be discussed in relation to the mineralogy. (orig.)

  15. De la vigilancia convencional al monitoreo participativo

    Directory of Open Access Journals (Sweden)

    Jaime Breilh

    Full Text Available La necesidad de transformar el monitoreo de la salud de un instrumento funcional al sistema dominante de poder en una herramienta del poder colectivo, y de negociación del desarrollo de la salud laboral y el bienestar, implica la urgente transformación de la vieja vigilancia epidemiológica en un monitoreo participativo. Debe superarse el sistema convencional de información en salud, que observa fundamentalmente los "factores de enfermedad" y sus efectos mórbidos aislados, invisibilizando los procesos de determinación integrales. Este trabajo analiza el proceso de derrota de los derechos sociales y laborales, lo cual sitúa el desafío planteado en un escenario de profundo retroceso social y asalto a los derechos conquistados por los/as trabajadores/as en años de lucha. Con el propósito de esclarecer dicho argumento, al autor comienza contrastando los modelos de vigilancia clásicos, algunas propuestas transicionales, hasta arribar al monitoreo participativo. La aplicación de la categoría "perfil epidemiológico" permite sistematizar los dominios y dimensiones del monitoreo y establecer los sujetos sociales de esa mirada crítica e intercultural del pueblo sobre su salud, mediante la construcción de una matriz de procesos críticos.

  16. Evaluation of aerial microbial pollutants in Al-Haram Al-Nabawi during pilgrimage of 2013.

    Science.gov (United States)

    Alananbeh, Kholoud M; Boquellah, Nahla; Kaff, Nadia Al; Ahmadi, Majid Al

    2017-01-01

    Al-Madinah Al-Munawwarah is the second holiest site in Islam. The possibility of new emerging microbes is valid due to the increased number of pilgrims. The objectives of the current study were to estimate the numbers of fungi and bacteria inside and outside Al-Haram Al-Nabawi and to find whether new bacterial and fungal species have emerged compared to previous studies. Air samples were collected twice a day from 12 spots and four directions during the pilgrim year of 2013 for four consecutive weeks by using the sedimentation method. Thirty five genera and fifty eight species were identified. The most recovered bacterial genera were Staphylococcus, Micrococcus, Bacillus, and Dermacoccus with 32.47%, 18.18%, 12.85%, and 11.23%, respectively. Fifty nine isolates of fungi were molecularly identified. Aspergillus species had the highest percentage (78%). The other fungal genera identified (Alternaria triticina, Emericella nidulans, Emericella striata, Mucor circinelloides, Penicillium chrysogenum, Penicillium minioluteum, Rhizopus arrhizus, Rhizopus oryzae, and Syncephalastrum racemosum) had less than 5% frequency. In places such as Al-Haram Al-Nabawi, a large and crowded public (millions) exist especially during pilgrimages and Ramadan, thus, exposure to microorganisms is high. On the other hand, microorganism infectivity depends on many factors including their virulence, landing site, and person's immunity. For those reasons, many aspects should be considered to avoid aerosol contaminants.

  17. Fabrication and Characterization of Al/p-CuInAlSe2 Thin Film Schottky Diodes

    Directory of Open Access Journals (Sweden)

    Usha Parihar

    2013-05-01

    Full Text Available Al/p-CuInAlSe2 polycrystalline schottky diodes fabricated by flash evaporation method were undertaken for their electrical analysis at room temperature. Diode parameters of the undertaken diodes were then derived from the current-voltage (I-V as well as capacitance-voltage (C-V characteristics. It has been observed that the schottky barrier height deduced from the room temperature I-V is lower to that obtained from the C-V characteristics and is attributed to the fact that I-V analysis includes both the image force and dipole lowering effects and is also reduced by the tunneling and leakage currents. The slope variation of the frequency dependent C – 2-V characteristics for the Al/p-CuInAlSe2 Schottky diode at varying frequency values from 50 kHz to 1 MHz suggests a large density of slow traps or interface states at the M-S junction. As emerging from the parameters values energy band diagram of Al and P-CuInAlSe2 has been reconstructed.

  18. Preparation of Al- AlN Bonded Corundum Based Refractories by in-situ Reaction

    Institute of Scientific and Technical Information of China (English)

    ZHU Boquan; FANG Binxiang; ZHANG Wenjie

    2008-01-01

    The Al-AlN bonded corundum based refractories was synthesized with the starting materials of fused alu-mina and metallic aluminium in nitrogen atmosphere through in-situ reaction. The study indicated that with the addition of 14% metallic aluminium (13% of Al powder and 1% of Al fiber) , the material nitridized at 1 100 ℃ for 3 h has excellent physical properties. It is found that a massive quantity of AlN in the forms of both whiskers" and hexagon pellet particles is formed, and a large quantity of Al remained in the matrix. This multiple bonding system resulted in the excellent me-chanical properties of the material. It is also found that the hydration tendency of the prepared material is inhib-ited, and the material exhibited excellent thermal shock resistance. The nature of protective oxidation of the bonding system is characterized. Thus, this material may become a new candidate of carbon-free sliding plate material for continuous casting.

  19. A comparative wear study on Al-Li and Al-Li/SiC composite

    Science.gov (United States)

    Okumus, S. Cem; Karslioglu, Ramazan; Akbulut, Hatem

    2013-12-01

    Aluminum-lithium based unreinforced (Al-8090) alloy and Al-8090/SiCp/17 vol.% metal matrix composite produced by extrusion after spray co-deposition. A dry ball-on disk wear test was carried out for both alloy and composite. The tests were performed against an Al2O3 ball, 10 mm in diameter, at room temperature and in laboratory air conditions with a relative humidity of 40-60%. Sliding speed was chosen as 1.0 ms-1 and normal loads of 1.0, 3.0 and 5.0 N were employed at a constant sliding distance of 1000 m. The wear damage on the specimens was evaluated via measurement of wear depth and diameter. Microstructural and wear characterization was carried out via scanning electron microscopy (SEM). The results showed that wear loss of the Al-8090/SiC composite was less than that of the Al-8090 matrix alloy. Plastic deformation observed on the wear surface of the composite and the matrix alloy, and the higher the applied load the greater the plastic deformation. Scanning electron microscopy examinations of wear tracks also reveal that delamination fracture was the dominant wear mechanism during the wear progression. Friction coefficient was maximum at the low applied load in the case of the Al-8090/SiC composite while a gradual increase was observed with applied load for the matrix alloy.

  20. Nanoindentation studies of ex situ AlN/Al metal matrix nanocomposites

    Energy Technology Data Exchange (ETDEWEB)

    Fale, Sandeep; Likhite, Ajay; Bhatt, Jatin, E-mail: jatinbhatt@mme.vnit.ac.in

    2014-12-05

    Highlights: • Formation of in-situ phases nucleated on AlN particles strengthens the matrix. • Formation of in-situ phases increases with AlN content in nanocomposites. • Stronger in-situ phases results in increased hardness and modulus of elasticity. - Abstract: Nanocrystalline Aluminium nitride (AlN) powder is dispersed in different weight ratio in Aluminum matrix to fabricate metal matrix nanocomposite (MMNC) using ex situ melt metallurgy process. The synthesized Al–AlN nanocomposites are studied for phase analysis using high resolution scanning electron microscopy (FEG-SEM) and for hardness behavior using microindentation and nanoindentation tests. Quantitative analysis of the oxide phases is calculated from thermodynamic data and mass balance equation using elemental data obtained from energy dispersive spectroscopy (EDS) results. Role of oxide phases in association with AlN particles is investigated to understand the mechanical behavior of composites using nanoindentation tester. Load–displacement profile obtained from nanoindentation test reveals distribution of oxide phases along with AlN particle and their effect on indent penetration.

  1. Evaluation of aerial microbial pollutants in Al-Haram Al-Nabawi during pilgrimage of 2013

    Directory of Open Access Journals (Sweden)

    Kholoud M. Alananbeh

    2017-01-01

    Full Text Available Al-Madinah Al-Munawwarah is the second holiest site in Islam. The possibility of new emerging microbes is valid due to the increased number of pilgrims. The objectives of the current study were to estimate the numbers of fungi and bacteria inside and outside Al-Haram Al-Nabawi and to find whether new bacterial and fungal species have emerged compared to previous studies. Air samples were collected twice a day from 12 spots and four directions during the pilgrim year of 2013 for four consecutive weeks by using the sedimentation method. Thirty five genera and fifty eight species were identified. The most recovered bacterial genera were Staphylococcus, Micrococcus, Bacillus, and Dermacoccus with 32.47%, 18.18%, 12.85%, and 11.23%, respectively. Fifty nine isolates of fungi were molecularly identified. Aspergillus species had the highest percentage (78%. The other fungal genera identified (Alternaria triticina, Emericella nidulans, Emericella striata, Mucor circinelloides, Penicillium chrysogenum, Penicillium minioluteum, Rhizopus arrhizus, Rhizopus oryzae, and Syncephalastrum racemosum had less than 5% frequency. In places such as Al-Haram Al-Nabawi, a large and crowded public (millions exist especially during pilgrimages and Ramadan, thus, exposure to microorganisms is high. On the other hand, microorganism infectivity depends on many factors including their virulence, landing site, and person’s immunity. For those reasons, many aspects should be considered to avoid aerosol contaminants.

  2. TEM characterization of Al-C-Cu-Al{sub 2}O{sub 3} composites produced by mechanical milling

    Energy Technology Data Exchange (ETDEWEB)

    Santos-Beltran, A. [Centro de Investigacion en Materiales Avanzados (CIMAV), Miguel de Cervantes No. 120, C.P. 31109, Chihuahua, Chih. (Mexico); Gallegos-Orozco, V. [Centro de Investigacion en Materiales Avanzados (CIMAV), Miguel de Cervantes No. 120, C.P. 31109, Chihuahua, Chih. (Mexico); Estrada-Guel, I. [Centro de Investigacion en Materiales Avanzados (CIMAV), Miguel de Cervantes No. 120, C.P. 31109, Chihuahua, Chih. (Mexico); Bejar-Gomez, L. [Universidad Mich. de San Nicolas de Hidalgo, Edif. ' W' , C.U., C.P. 58000, Morelia, Mich. (Mexico); Espinosa-Magana, F. [Centro de Investigacion en Materiales Avanzados (CIMAV), Miguel de Cervantes No. 120, C.P. 31109, Chihuahua, Chih. (Mexico); Miki-Yoshida, M. [Centro de Investigacion en Materiales Avanzados (CIMAV), Miguel de Cervantes No. 120, C.P. 31109, Chihuahua, Chih. (Mexico); Martinez-Sanchez, R. [Centro de Investigacion en Materiales Avanzados (CIMAV), Miguel de Cervantes No. 120, C.P. 31109, Chihuahua, Chih. (Mexico)]. E-mail: roberto.martinez@cimav.edu.mx

    2007-05-31

    Novel Al-based composites (Al-C-Cu-Al{sub 2}O{sub 3}) obtained by mechanical milling (MM), were characterized by transmission electron microscopy (TEM) and electron energy loss spectroscopy (EELS). Analyses of composites were carried out in both, the as-milled and the as-sintered conditions. C nanoparticles were found in the as-milled condition and Al{sub 2}O{sub 3} nanofibers were found in as-sintered products, as determined by EELS. C and Cu react with Al to crystallize in Al{sub 3}C{sub 4} and Al{sub 2}Cu structures, respectively.

  3. Billing of over-consumption and under-consumption in the gas sector; Mehr-/Mindermengenabrechnung im Gasbereich

    Energy Technology Data Exchange (ETDEWEB)

    Kolo, Andreas; Neidert, Andy; Rabe, Alessandro [BTU EVU Betriebswirtschaftlich-Technische Unternehmensberatung fuer Energieversorger GmbH, Duesseldorf (Germany)

    2010-11-15

    Operators of gas grids are under increasing pressure for correct and timely billing of over-consumption and under-consumption. This is reflected by the decision BK7-10-128 of the BNetzA (Bundesnetzagentur, German Federal Network Agency) of July 2010, in which the gas grid operator of E.ON Hanse is obliged to bill two customers for the period through 31 December 2008, as requested by them, within two months. In case of non-compliance, a fine of 1 million Euros is to be paid per customer that raised a complaint. Against this background, a recent study illustrates the current situation of billing for over-consumption and under-consumption. (orig.)

  4. More momentum instead of mass. Network control by municipal public utilities; Mehr Schwung statt Masse. Netzsteuerung durch Stadtwerke

    Energy Technology Data Exchange (ETDEWEB)

    Schwarzburger, Heiko

    2013-10-01

    Inverters can simulate the inertia of the turbine and generator from conventional power plants. Therefore the fossil power power plants blocks are unnecessary. From 2017 solar farms have to enable this function. [German] Wechselrichter koennen die Traegheit der Turbinen und Generatoren aus herkoemmlichen Kraftwerken nachbilden. Damit werden die fossilen Bloecke ueberfluessig. Ab 2017 muessen Solarparks diese Funktion ermoeglichen.

  5. MEGA. Higher energy-efficiency through systematic user information - Final report; MEGA. Mehr Energieeffizienz durch gezielte Anwenderinformationen - Schlussbericht

    Energy Technology Data Exchange (ETDEWEB)

    Fercu, M.; Kistler, R. [Hochschule Luzern Technik und Architektur, CEESAR - iHomeLab, Horw (Switzerland); Egli, A. [Hochschule Luzern Technik und Architektur, ISIS, Horw (Switzerland); Gallati, J. [Hochschule Luzern Technik und Architektur, Wirtschaft, Horw (Switzerland)

    2010-09-15

    Individuals are empowered to conserve energy and natural resources when provided with motivational and personalized information on its use. By presenting information about the energy consumption from the home's energy meters along with recommended actions, the residential customer becomes aware of how in/efficiently energy is consumed within his home and can decide on how to act to conserve. This information can provide an accurate metric of how effective a conservation action is even to inhabitants that are not yet knowledgeable about or self-motivated by the monetary and ecologic rewards of conserving. This project was designed to build knowledge on technically and economically feasible ways to create an awareness of energy (especially electricity) for the sake of conservation. Specifically, it implements an exemplar prototype of a highly effective energy feedback system that is an interactive, real-time, in-home display. Toward this goal, four system architecture configuration proposals, a set of system requirements, and ideal system features are synthesized; they are based on the results of the research that evaluates effectiveness of existing energy-efficiency and -conservation methods and studies related technologies. Three of the four systems proposed represent energy technologies expected to be available within the next decade. The fourth system proposal is a demonstration prototype designed for implementation in the iHomeLab. This prototype is an open, modular, robust, cross-platform software framework that collects data, processes, and presents it interactively and visually on hardware available in most households. The results of this project both indicate that the creation of such energy feedback systems appear beneficial and also provide guidelines for their design. However, further development of infrastructure and elaboration of design is foreseen as necessary for this system to be suitable for mass deployment. (author)

  6. „wäre er nicht mehr Staat“: Schelling and Rosenzweig on the state and beyond the state

    Directory of Open Access Journals (Sweden)

    Bojanić Petar

    2012-01-01

    Full Text Available The surprising thing about “Das älteste Systemprogramm des deutschen Idealismus. Ein handshriftliher Fund,” one of Rosenzweig’s best supported and most carefully detailed texts, is that he almost completely ignores one of the most stunning and mysterious fragments of this brief, two-page manuscript that he discovers in 1914 at the Prussian State Library in Berlin. Not only that: while discussing and justifying in detail every part of this manuscript, attempting to prove that just because it is in Hegel’s handwriting, does not necessarily mean that Hegel is its author, Rosenzweig completely sidelines the famous, completely anarchistic, and radical fragment about the state. My question then is, why does Rosenzweig leave out any argument about Schelling’s understanding of the state? Or more precisely, how have Schelling’s positions on the state been incorporated and transformed in Rosenzweig’s texts? How does Rosenzweig use these fragments? Why does he nowhere thematize Schelling’s thoughts on the state, or what in eine revolutionäre Staatslehre Rosenzweig calls Schelling’s revolutionary teachings on the matter?

  7. Nature's powerhouse. Innovative technologies for a more sustainable future; Kraftwerk Natur. Innovative Technologien fuer mehr Nachhaltigkeit

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    2013-09-01

    Across the globe, our hunger for energy continues to grow. Yet climate change and dwindling fossil fuel supplies are forcing us to rethink our energy policy and turn increasingly to renewable resources. Achieving a sustainable energy mix and eco-friendly mobility options demands innovative technologies. And that is where Linde's gas and plant engineering specialists come in, developing efficient processes and providing crucial momentum for a greener future. (orig.)

  8. Energy cards create transparency for energy efficiency-oriented planning and control processes; Energiekarten schaffen mehr Transparenz

    Energy Technology Data Exchange (ETDEWEB)

    Mueller, Egon; Hopf, Hendrik; Arndt, Romina; Krones, Manuela [Technische Univ. Chemnitz (Germany). Professur Fabrikplanung und Fabrikbetrieb

    2012-10-15

    Detailed energy information is required for energy efficiency improvements. This leads to the need to illustrate the issue ''energy'' in a tangible and visible form. The presented tool enables the transfer of energy information and knowledge in the factory environment in a structured and clear manner.

  9. Aspectos biopsicosociales asociados al embarazo adolescente

    Directory of Open Access Journals (Sweden)

    Regina Cogollo Jiménez

    2012-12-01

    Full Text Available Introducción: El embarazo en la adolescencia, es un evento inesperado, sorpresivo. Este artículo establece la importancia de identificar los aspectos biopsicosociales asociados al embarazo adolescente en las embarazadas asistentes al programa de Control Prenatal de una Empresa Social del Estado de nivel 1 en Montería en 2009, para comprender las actitudes y los comportamientos asociados a esta etapa tan temprana. Materiales y Métodos: Es un estudio descriptivo, cuantitativo, de corte transversal. Población y muestra: 30 adolescentes embarazadas asistentes al Programa, el muestreo por conveniencia. Se utilizó la encuesta y la observación directa, previa autorización del Director de la empresa. Resultados: Caracterización de la población: predominó la edad de 15 a 19 años (adolescencia tardía, uniones libres, baja escolaridad debido a la deserción escolar, ingreso económico menor al salario mínimo legal vigente. Aspectos Biológicos: la menarquía a temprana edad (9 a 14 años, y en ella la mitad de los embarazos. La mayoría de los segundos embarazos terminaron en parto, la minoría en cesárea y aborto. La captación para los controles prenatales fue tardía, algunas no cumplieron con las citas programadas. Aspectos Psicológicos: inestabilidad con la pareja al enterarse del embarazo, tuvieron soporte familiar moral y económico, abandonaron sus estudios y presentaron malestares como estrés, depresión y tristeza. Aspectos Sociales: predominó la convivencia con la familia extensa. Hubo aceptación en el colegio y en los amigos. Discusión y Conclusiones: Se plantean estrategias para disminuir estos aspectos: elaboración de una cartilla sobre “Cuidado de la adolescente embarazada”, creación de espacios de reflexión, jornadas lúdicas educativas, entre otros. (Rev Cuid 2012; 3(3:385-93.Palabras clave: Embarazo en Adolescencia, Bienestar Materno, Atención Prenatal. (Fuente: De

  10. Study on Interface between Sub-micron Particles and Matrix n Al2O3p/Al Composites

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    The microstructural characteristic of 1070Al matrix composites reinforced by 0.15 μm Al2O3 particles whose volume fraction was 40% was investigated by TEM and HREM. The results showed that the interface between the matrix and reinforcements was clean and bonded well, without any interfacial reaction products. There were some preferential crystallographic orientation relationships between Al matrix and Al2O3 particle because of the lattice imperfection on the surface of Al2O3 particles.

  11. Motivasi Berpikir Menurut al-Qur’an

    Directory of Open Access Journals (Sweden)

    Dwi Andriyani

    2016-07-01

    Full Text Available Kitab Suci Al-Qur’an merupakan kitab Allah yang diturunkan kepada umat manusia sebagai petunjuk bagi kita semua, yang mana diturunkan kepada umat Nabi Muhammad Saw mulai dari berabad-abad yang lalu, hingga sampai sekarang ini. Al-Qur’an di dalamnya banyak sekali mengandung isyarat ilmiah yang berguna bagi umat manusia. Oleh karena itu, sebagai makhluk Allah yang dikarunia akal pikiran, sudah seharusnya menjadi tugas kita untuk mengungkap apa yang ada di dalam al-Qur’an yang menjadi isyarat ilmiah bagi kemajuan ilmu pengetahuan. Al-Qur’an banyak memberikan motivasi bagi umat manusia, terutama motivasi berpikir. Berpikir adalah olah kerja otak yang yang berfungsi mencari hakekat dari sesuatu. Namun, dalam al-Qur’an berpikir juga tidak semuanya dilakukan oleh akal pikiran, melainkan juga dapat dilakukan dengan hati. Ketika mengkaji lebih dalam mengenai berpikir, maka akan didapatkan beberapa lafadz yang mempunyai pengertian yang sama, yaitu berpikir. Seperti lafadz nazara, tadabbara atau tadabbur, tafakkara atau tafakkur, faqiha atau fiqh atau tafaqquh, tazakkara, dan faham. Semua yang disebutkan di atas adalah mempunyai pengertian yang hampir sama. Membangkitkan motivasi berpikir dalam mengkaji ayat-ayat al-Qur’an sangatlah bermanfaat dalam menambah wawasan, dan juga dapat menambah keimanan kita kepada Allah Swt. Beberapa penemuan yang ada pada saat sekarang ini merupakan bukti dari kebenaran al-Qur’an, isyarat ilmiahnya dapat dibuktikan dengan beberapa penemuan di bidang ilmu pengetahuan.   The Holy Qur'an is a book of God revealed to mankind as a guide for all of us, which was revealed to the Prophet Muhammad's people from many centuries ago until now. The Qur'an contains a lot of useful scientific cue for mankind. Therefore, as a creature of Allah endowed with a mind, it should be our duty to reveal what is in the Qur’an becomes the scientific cue to the advancement of knowledge. The Holy Qur'an has provided motivation for

  12. Deutsch als "leicht zu erlernende Fremdsprache"

    Directory of Open Access Journals (Sweden)

    Kurtz, Gunde

    2005-01-01

    Full Text Available The goal of this paper is to encourage the search for accessible language features and teaching and learning facilitators which can ease the way into German as a Foreign Language (DaF.The paper begins with a terminological discussion, followed by a first model of the most important factors concerning the initial entry into FL territory. After a short review on previous work in this area, I consider methods for utilising knowledge of accessible language features and teaching and learning facilitators. Finally, suspected facilitating features - which have come to light through research as well as classroom observations – are exemplified. These, however, are to be understood as working hypotheses and thus still 'under construction'.Through this paper, I would like to invite other researchers to consider a new perspective on DaF with the intention of changing the status quo:"Applied linguistics is not simply a matter of matching up findings about language with pre-existing problems but of using findings to explore how the perception of problems might be changed. It may be that when problems are reformulated from a different point of view they become more amenable to solution. This changed perception may then, in turn, have implications for linguistics." (Cook : 2003: 10My goal will have been achieved when the focus of this paper becomes a motivation for improving DaF teaching ("problems [...] become more amenable to solution" - and, should it lead to "implications for linguistics", so much the better.Ziel dieses Beitrages ist, eine umfassende Suche nach leichten Stellen und Erleichterungen beim Zugang zum Deutschen als fremder Sprache anzuregen.Nach Begriffsklärung und einem ersten Vorschlag zu den für die Zugänglichkeit einer Sprache ausschlaggebenden Faktoren (1 sowie einem kurzen Überblick über Fundstücke zum Thema (2 steht die Rolle der praktischen Umsetzung von Erkenntnissen als Hauptinstrument für den Bereich der Erleichterungen und

  13. Erlebten Frauen den Holocaust anders als Männer? Did Men and Women Experience the Holocaust in Different Ways?

    Directory of Open Access Journals (Sweden)

    Angela Schwarz

    2000-11-01

    Full Text Available Der vorliegende Sammelband basiert auf Vorträgen einer Konferenz aus dem Jahr 1995, auf der nach dem spezifischen Erleben des Holocaust durch Frauen gefragt wurde. In der Regel waren es Zeugnisse von Überlebenden, die die Grundlage für die Analyse von Verhalten und Reaktionen von Frauen bildeten. Diskutiert wurde aber nicht nur über die einzelnen Erfahrungsbereiche jüdischer Frauen in West- und Osteuropa in Zwischenkriegs- und Kriegszeit, sondern ebenso über die Anwendbarkeit der „Gender-Frage“ auf den Holocaust generell. Entstanden ist so ein interessanter Überblick über den aktuellen Stand der Diskussion, der die Grenzen und mehr noch die Chancen eines solchen Zugangs hervortreten läßt.h the limits of the gender approach in this field of research are obvious, the gains promised by a further look into this matter outweigh them by far.

  14. Studies of Al metabolism in animal by accelerator mass spectrometry

    Institute of Scientific and Technical Information of China (English)

    WangNa-Xiu; ZhuHan-Min; 等

    1997-01-01

    The correlation between Al metabolism and senile dementia in animal has been studied by AMS(accelerator mass spectrometry).Three groups of laboratory rats were fed with normal food.food with high Al content,and with enriched Ca and Mg together with high Al,respectively for six to eight months.Mapping test was made to recored th degree of wisdom degeneration.Half of the rats were sacrificed and Al contents in various organs were measured by atomic absorption spectroscopy.The rest were injected with 26Al,killed after 5,10,15,25,and 35d and 26Al contents measured by AMS.The distribution of Al as well as the correlation among the accumulation of 26Al,and the existed Al content and dementia was studied.

  15. Effect of the composition of Al-Li alloys on the quantitative relation between the δ'(Al3Li), S1(Al2MgLi), and T1(Al2CuLi) phases

    Science.gov (United States)

    Betsofen, S. Ya.; Antipov, V. V.; Grushin, I. A.; Knyazev, M. I.; Khokhlatova, L. B.; Alekseev, A. A.

    2015-01-01

    Al-Li alloys are considered. A quantitative approach to the determination of the ratio of the fractions of the binary and ternary intermetallic phases in Al-Mg(Cu)-Li alloys is developed on the basis of chemical and phase composition balance equations and the experimentally measured lattice parameter of the α solid solution. The ratio of the fractions of the δ'(Al3Li) and S1(T1) phases in Al-Mg(Cu)-Li alloys is shown to be determined by the ratio of the mole fractions of Li and Mg(Cu). Equations are proposed for calculating the weight fractions of the S1(Al2MgLi), T1(Al2CuLi) and δ'(Al3Li) phases in domestic and foreign Al-Mg-Li alloys 1420, 1424, 5090 and Al-Cu-Li alloys 1440, 1460, 1461, 1441, 1469, 2090, 2095, 8090, and Weldalite 049.

  16. High-efficiency of AlInGaN/Al(In)GaN-delta AlGaN quantum wells for deep-ultraviolet emission

    Science.gov (United States)

    Saidi, Hosni; Ridene, Said

    2016-10-01

    Band structure and optical gain properties of AlInGaN/AlInGaN-delta-AlGaN quantum wells for deep-ultraviolet light emitting and lasers diodes with wavelength λ ∼229 nm and TE-polarized optical gain peak intensity ∼1.7 times larger than the conventional AlInN-delta-GaN was proposed and investigated in this work. The active region is made up of 20 Å staggered Al0.89In0.03Ga0.08N/Al0.8In 0.01Ga0.19N layers with a 3 Å Al0.46Ga0.54N delta layer. The use of the quaternary AlInGaN well layer permits the independent control of the band gap and the lattice parameter, so that the internal electric field induced by polarizations can be reduced and interband transition energy increases. Therefore, we can predict that the optical performance of the AlInGaN-delta-AlGaN is more convenient for an emission in the deep-ultraviolet than that of the conventional AlInN-delta-GaN-based quantum wells.

  17. Gaussian density-functional study for small neutral (Al n ), positive (Al{/n +}) and negative (Al{/n -}) aluminium clusters ( n=2 5)

    Science.gov (United States)

    Calaminici, Patrizia; Russo, Nino; Toscano, Marirosa

    1995-12-01

    The structures and properties of Al n , Al{/n +}, Al{/n -} ( n=1,5) clusters have been investigated by using the Linear Combination of Gaussian Type Orbitals (LCGTO) method, considering Local (LSD) and Non Local (NLSD) Spin Density Approximations and employing a Model Core Potential (MCP) that allows the explicit treatment of 3 s 2 3 p 1 valence electrons. For each system different geometrical structures and electronic states have been considered. For Al3, Al{3/+}, Al{3/-} the most stable geometry proved to be the equilateral triangle ( D 3 h ). Al4 and Al{4/+} prefer the rhombus ( D 2 h ) structure, while the corresponding anion prefers the square ( D 4 h ) one. The trapezoidal form ( C 2 v ) is the most stable isomer for Al5, Al{5/+} and Al{5/-} clusters. The analysis of vibrational frequencies shows that these structures are minima in the potential energy surface. The binding energies ( D e), the adiabatic ionization potentials (IP) and electron affinities (EA), the chemical potentials or absolute hardnesses (η) and electronegativities (χ) have been computed. Results are in good agreement with the available experimental data and the previous high level theoretical computations.

  18. Effect of nitrogen incorporation into Al-based gate insulators in AlON/AlGaN/GaN metal-oxide-semiconductor structures

    Science.gov (United States)

    Asahara, Ryohei; Nozaki, Mikito; Yamada, Takahiro; Ito, Joyo; Nakazawa, Satoshi; Ishida, Masahiro; Ueda, Tetsuzo; Yoshigoe, Akitaka; Hosoi, Takuji; Shimura, Takayoshi; Watanabe, Heiji

    2016-10-01

    The superior physical and electrical properties of aluminum oxynitride (AlON) gate dielectrics on AlGaN/GaN substrates in terms of thermal stability, reliability, and interface quality were demonstrated by direct AlON deposition and subsequent annealing. Nitrogen incorporation into alumina was proven to be beneficial both for suppressing intermixing at the insulator/AlGaN interface and reducing the number of electrical defects in Al2O3 films. Consequently, we achieved high-quality AlON/AlGaN/GaN metal-oxide-semiconductor capacitors with improved stability against charge injection and a reduced interface state density as low as 1.2 × 1011 cm-2 eV-1. The impact of nitrogen incorporation into the insulator will be discussed on the basis of experimental findings.

  19. AlGaN nanocolumns and AlGaN/GaN/AlGaN nanostructures grown by molecular beam epitaxy

    Energy Technology Data Exchange (ETDEWEB)

    Ristic, J.; Sanchez-Garcia, M.A.; Ulloa, J.M.; Calleja, E. [Departamento de Ingenieria Electronica, ETSI Telecomunicacion, Universidad Politecnica de Madrid, Ciudad Universitaria, 28040 Madrid (Spain); Sanchez-Paramo, J.; Calleja, J.M. [Departamento de Fisica de Materiales, Universidad Autonoma de Madrid, Cantoblanco, 28049 Madrid (Spain); Jahn, U.; Trampert, A.; Ploog, K.H. [Paul-Drude-Institut fuer Festkoerperelektronik, Hausvogteiplatz 5-7, 10117 Berlin (Germany)

    2002-12-01

    This work reports on the characterization of hexagonal, single crystal AlGaN nanocolumns with diameters in the range of 30 to 100 nm grown by molecular beam epitaxy on Si(111) substrates. The change of the flux ratio between the Al and the total III-element controls the alloy composition. The Al composition trend versus the Al flux is consistent both with the E{sub 2} phonon energy values measured by inelastic light scattering and the luminescence emission peaks position. High quality low dimensional AlGaN/GaN/AlGaN heterostructures with five GaN quantum discs, 2 and 4 nm thick, embedded into the AlGaN columns, were designed in order to study the quantum confinement effects. (Abstract Copyright [2002], Wiley Periodicals, Inc.)

  20. Al-Ca and Al-Fe metal-metal composite strength, conductivity, and microstructure relationships

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Hyong June [Iowa State Univ., Ames, IA (United States)

    2011-01-01

    Deformation processed metal-metal composites (DMMC’s) are composites formed by mechanical working (i.e., rolling, swaging, or wire drawing) of two-phase, ductile metal mixtures. Since both the matrix and reinforcing phase are ductile metals, the composites can be heavily deformed to reduce the thickness and spacing of the two phases. Recent studies have shown that heavily drawn DMMCs can achieve anomalously high strength and outstanding combinations of strength and conductivity. In this study, Al-Fe wire composite with 0.07, 0.1, and 0.2 volume fractions of Fe filaments and Al-Ca wire composite with 0.03, 0.06, and 0.09 volume fractions of Ca filaments were produced in situ, and their mechanical properties were measured as a function of deformation true strain. The Al-Fe composites displayed limited deformation of the Fe phase even at high true strains, resulting in little strengthening effect in those composites. Al-9vol%Ca wire was deformed to a deformation true strain of 13.76. The resulting Ca second-phase filaments were deformed to thicknesses on the order of one micrometer. The ultimate tensile strength increased exponentially with increasing deformation true strain, reaching a value of 197 MPa at a true strain of 13.76. This value is 2.5 times higher than the value predicted by the rule of mixtures. A quantitative relationship between UTS and deformation true strain was determined. X-ray diffraction data on transformation of Al + Ca microstructures to Al + various Al-Ca intermetallic compounds were obtained at the Advanced Photon Source at Argonne National Laboratory. Electrical conductivity was measured over a range of true strains and post-deformation heat treatment schedules.

  1. RESEARCH ON ELECTROCHROMIC PROPERTIES OF Al2O3/ B-Al-NiO-BASED FILM%Al2O3/B-Al-Nio薄膜电致变色性能的研究

    Institute of Scientific and Technical Information of China (English)

    楼贤春; 周学东; 曾涛

    2009-01-01

    采用溶胶-凝胶法制备了B-Al-Nio和Al2O3/B-Al-NiO复合薄膜.采用扫描电镜,电化学测试和透过率测试分析Al2O3薄膜并对B-Al-NiO的变色性能和稳定性进行分析和表征.结果表明Al2O3薄膜对NiO基薄膜的变色效果影响不大,同时有效提高NiO基薄膜的稳定性.

  2. Mechanism and kinetics analysis of AlN combustion synthesis

    Institute of Scientific and Technical Information of China (English)

    郑永挺; 张宇民; 赫晓东; 刘长青

    2004-01-01

    Mechanism of AlN combustion synthesis was studied by DSC analysis and "quenching" experiment of combustion wave. In preheating region, Al powder melted at 660 ℃ and became spherical because of surface tension. In reaction region, Al volatilized rapidly at 1 000 ℃ and Al vapor reacted with N2 to form AlN, which nucleated and grew on the surface of AlN formed precedently as a diluent. Based on the experiment analysis,kinetics equations and modeling were established. Analysis showed the dramatic effect of temperature, aluminum particle size and nitrogen pressure on the reaction speed.

  3. Tolerancia al co en celdas de combustible

    Directory of Open Access Journals (Sweden)

    BIBIAN HOYOS

    2008-01-01

    Full Text Available El entendimiento completo del proceso de adsorción y posterior oxidación de moléculas de CO en platino es de fundamental importancia para el desarrollo de celdas de combustible poliméricas que operan a baja temperatura. En este trabajo se presenta una revisión de las cinco estrategias experimentales más importantes en la búsqueda de mejorar la tolerancia al CO: disminución del potencial de inicio de la reacción de oxidación, reducción de la cantidad de CO adsorbido, utilización de pequeñas cantidades de oxígeno en la corriente de alimentación al ánodo, aumento de la temperatura de operación y limpieza del CO a la entrada. Aunque se han desarrollado catalizadores bastante promisorios (PtMo y PdAu, todavía se sigue considerando a la mezcla Pt-Ru como el catalizador anódico más eficiente para combustibles que contienen 10 ppm de CO o más. La estrategia de inyectar oxígeno al ánodo parece promisoria pero requiere el desarrollo de nuevas membranas más resistentes y de la implementación de condiciones más seguras de operación de la celda. El diseño estructural de ánodos especiales con múltiples capas soportando catalizadores específicos para cada tipo de combustible puede ser una estrategia muy atractiva.

  4. Altern als Widerstand Aging as Resistance

    Directory of Open Access Journals (Sweden)

    Roberta Maierhofer

    2005-07-01

    Full Text Available Gullettes kulturwissenschaftliche Untersuchung Aged by Culture ist wie bereits ihre zwei vorangehenden Werke, die sich mit Altern beschäftigen – Safe at Last in the Middle Years: The Invention of the Midlife Progress Novel (1988 und Declining to Decline. Cultural Combat and the Politics of the Middle (1997 –, von großem persönlichen Engagement und durch ein politisches Anliegen motiviert. Sowohl die Dringlichkeit als auch der Widerstand, den Gullette, die sich als „age critic“ definiert, als moralische und politische Notwendigkeit postuliert, werden in der Zweiteilung der Abhandlung angesprochen: „Cultural Urgencies“ und „Theorizing Age Resistantly“. Während Gullette den Begriff „aged by culture“ bereits in Declining to Decline einführt, stellt sie ihn nun in den Mittelpunkt ihrer Untersuchung. Das Buch ist einerseits einer gesellschaftspolitischen Analyse der USA gewidmet, andererseits wird eine Theorie des Widerstands gegenüber Altersdiskriminierung entwickelt.Gullette’s cultural studies based analysis Aged by Culture is marked by great personal engagement and motivated by political goals, as are her two previous texts that deal with aging: Safe at Last in the Middle Years: The Invention of the Midlife Progress Novel (1988 and Declining to Decline. Cultural Combat and the Politics of the Middle (1997. Both the urgency as well as the resistance that Gullette, who defines herself as an “age critic,” postulates as a moral and political necessity are addressed in the two parts of the text: “Cultural Urgencies” and “Theorizing Age Resistantly.” Whereas Gullette had already introduced the concept “aged by culture” in Declining to Decline, now she has placed it at the center of her examination. On the one hand, the book is devoted to a sociopolitical analysis of the USA; on the other hand, it develops a theory of resistance to age discrimination.

  5. 76 FR 78717 - In the Matter of the Designation of Saleh al-Qarawi also known as Saleh Al Qarawi also known as...

    Science.gov (United States)

    2011-12-19

    ... Matter of the Designation of Saleh al-Qarawi also known as Saleh Al Qarawi also known as Saleh Abudullah Saleh Al Qarawi also known as Saleh bin Abdullah al-Qarawi also known as Akhuk al Saghir also known as Fawakeh also known as Mootasem also known as Abu Yahya Al Qarawi also known as Najm Al-Kheir as...

  6. Del mito creacionista al mito futurista

    Directory of Open Access Journals (Sweden)

    Fernando Uhía

    2011-12-01

    Full Text Available La primera foto tomada a la Tierra desde el espacio, en 1946, es uno de los signos de la reprogramación mitológica que está afectando la percepción actual de las ciencias y las artes. Esta reprogramación opone a Dios como artífice y al artista como dios creador: un superhumano tecnólogo y un artista administrador de la Tierra. Se repasa en esta reprogramación el papel de las academias de arte, de las revoluciones científicas, del arte de vanguardia y del arte pop.

  7. Derecho humano al agua en el Ecuador

    OpenAIRE

    Buitrón Cisneros, Ricardo

    2010-01-01

    En el Ecuador existe un proceso histórico de concentración y acaparamiento del agua. La política de ajuste estructural llevó a que empresas de servicios de agua potable sean privatizadas. La constitución del 2008 modificó el marco normativo para el agua en el país, se reconoce el derecho humano al agua, los derechos de la naturaleza, el manejo exclusivo público y comunitario y su no privatización. El proceso de reorganización institucional y de construcción de la nueva propuesta de ley de ...

  8. Hot Deformation Behavior of 2124 Al Alloy

    Institute of Scientific and Technical Information of China (English)

    S.Ramanathan; R.Karthikeyan; V.Deepak Kumar; G.Ganesan

    2006-01-01

    The mechanical behavior of 2124 Al alloy produced by powder metallurgy was investigated with compression test at different temperatures and strain rates. The tests were performed in the temperature range of 300℃~500℃ and at strain rates from 0.001 s-1 to 1.0 s-1. The compression flow curves exhibited an initial sharp increase with strain, followed by monotonous hardening. The maximum stress decreased with decreasing strain rate and increasing temperature. The hot deformation characteristics of the material were studied using processing maps. The domain of safety and unsafe regime were identified and validated through microstructural examination.

  9. Konsep Alam Semesta Menurut Al-Quran

    Directory of Open Access Journals (Sweden)

    Ade Jamarudin

    2010-11-01

    Full Text Available Penciptaan alam merupakan bukti kekuasaan dan kebesaran Allah Swt. Kenyataan tersebut membuktikan kemahaluasan ilmu Allah dibandingkan pengetahuan yang kita miliki. Tidak ada kesulitan bagi Allah untuk mencipta juga menghancurkan alam semesta ini. Ungkapan kesyukuran atas segala nikmat alam semesta ini dibuktikan dengan sikap bersahabat dengan alam yang lebih baik. Ayat-ayat kosmologis dalam Al-Qur’an merupakan petanda lain dari fakta alam semesta. Keduanya saling menjelaskan satu sama lain. Makro-kosmos dan mikrokosmos merupakan bukti nyata akan belas kasih-Nya terhadap manusia di muka bumi.

  10. 1950 En torno al Museo Louisiana 1970

    OpenAIRE

    2016-01-01

    La tesis “1950 En torno al Museo Louisiana 1970” analiza varias obras relacionadas con el espacio doméstico, que se realizaron entre 1950 y 1970 en Dinamarca, un periodo de esplendor de la Arquitectura Moderna. Tras el aislamiento y restricciones del conflicto bélico que asoló Europa, los jóvenes arquitectos daneses, estaban deseosos por experimentar nuevas ideas de procedencia internacional, favorecidos por diferentes circunstancias, encuentran el mejor campo de ensayo en el espacio doméstic...

  11. Aproximación al pensamiento quevediano

    Directory of Open Access Journals (Sweden)

    Bernardo Parra Restrepo

    1999-06-01

    Full Text Available Este artículo hace una aproximación al pensamiento filosófico de Manuel Quevedo. Examina de manera breve sus dos aportes más importantes a saber, la filosofía de los complementarios y la teoría coligatorial. Introduce la filosofía de los complementarios como una nueva concepción de la dialéctica desarrollada por Quevedo, y explica las razones que lo condujeron a elaborar la teoría coligatorial como instrumento de tipo matemático que permite trabajar con la filosofía de las relaciones.

  12. Deleuze y Heidegger… en torno al signo

    OpenAIRE

    Ricardo Espinoza Lolas; Patricio Landaeta

    2007-01-01

    En este texto se intenta articular entre Deleuze y Heidegger sus ideas relativas al signo para ver tanto su unidad como diferencias. Para ello se desarrolla las nociones de Wink y de Destruktion del filósofo alemán y las ideas de “semiótica” o “regímenes de signos” del pensador francés. Ambos coinciden en la preponderancia del signo, su potencia destructora como índice de toda creación posible de significaciones; aunque ambos difieren radicalmente en la concepción misma de filosofía que abre ...

  13. Introducción al entorno R

    OpenAIRE

    2010-01-01

    R puede entenderse como un lenguaje de programación, como un potente software de análisis estadísticos o incluso como un generador de gráficos. Cualquiera de las tres acepciones es compatible con una definición de R. Estas páginas ofrecen al lector interesado y no iniciado en programación, los conceptos básicos y necesarios de la sintaxis de R que le permitirán trabajar en un entorno pensado para su uso con interfaces de códigos. Si bien es cierto que existen interfaces gráficas (R Commander)...

  14. Aproximaciones al concepto de interactividad educativa

    OpenAIRE

    Zangara, Alejandra; Sanz, Cecilia Verónica

    2012-01-01

    Este trabajo presenta una reflexión sobre el concepto de interactividad, y en particular, sobre interactividad educativa. Hoy en día se escucha hablar de software interactivo, televisión digital interactiva, interacción/interactividad, y se asume el concepto de interactividad sin una reflexión sobre éste. Se proponen aquí algunos puntos de análisis al respecto, una diferenciación entre interacción e interactividad, y una vinculación entre interactividad educativa y el concepto de distancia tr...

  15. Ibn al-Haytham and geometry

    CERN Document Server

    Rashed, Roshdi

    2013-01-01

    Theory of Conics, Geometrical Constructions and Practical Geometry: A History of Arabic Sciences and Mathematics Volume 3, provides a unique primary source on the history and philosophy of mathematics and science from the mediaeval Arab world. The present text is complemented by two preceding volumes of A History of Arabic Sciences and Mathematics, which focused on founding figures and commentators in the ninth and tenth centuries, and the historical and epistemological development of 'infinitesimal mathematics' as it became clearly articulated in the oeuvre of Ibn al-Haytham.

  16. Role of Al2O3 fiber in eutectic Al-Si alloy composites

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    The effects of Al2O3 fiber on wear characteristics of eutectic Al-Si alloy composites were studied using a pin-on-disk tester under dry sliding condition. The results show that the Al2O3 fiber can make matrix grain be fine, specially the eutectic Si be finer and prevent the plastic flow of matrix and prohibit the crack propagation in the wear layer, thereby it can remarkably improve the mechanical property and the wear resistance of the MMCs. Since Al2O3 fiber plays a role of certain framework in protecting the matrix against crash, it can eliminate the severe wear of MMCs with higher φf of fiber from the beginning of test. At mild stage, when φf is in the range of 8%~10%, the wear rates are the lowest. With increasing φf of Al2O3 fiber, the wear mechanism of MMCs can be transformed from adhesive delamination to brittle breakaway.

  17. Tailoring ultrafine grained and dispersion-strengthened Ti$_2$AlC/TiAl composite via a new fabrication route

    Indian Academy of Sciences (India)

    TAOTAO AI; QI YU; WENHU LI; XIANGYU ZOU; ZHIFENG DENG; XINQIANG YUAN

    2016-09-01

    In situ Ti$_2$AlC/TiAl composite was fabricated by hot-pressing method via the reaction system of Ti$_3$AlC$_2$ and Ti-Al pre-alloyed powders at low temperature of 1150$^{\\circ}$C. The composite mainly consisted of TiAl, Ti$_3$Al and Ti$_2$AlC phases. Fine Ti$_2$AlC particles were homogeneously distributed and dispersed in the matrix. Ti$_2$AlC played the significant role of deflecting and blunting the cracks and contributed to improve the mechanical properties of the composite. The Vickers hardness, flexural strength and fracture toughness were 6.2 GPa, $993.9\\pm 50.8$ MPa and $6.7\\pm 0.3$ MPa m$^{1/2}$, respectively.

  18. The improvement of Al2O3/AlGaN/GaN MISHEMT performance by N2 plasma pretreatment

    Institute of Scientific and Technical Information of China (English)

    Feng Qian; Tian Yuan; Bi Zhi-Wei; Yue Yuan-Zheng; Ni Jin-Yu; Zhang Jin-Cheng; Hao Yue; Yang Lin-An

    2009-01-01

    This paper discusses the effect of N2 plasma treatment before dielectric deposition on the electrical performance of a Al2O3/AlGaN/GaN metal-insulator-semiconductor high electron mobility transistor (MISHEMT), with Al2O3deposited by atomic layer deposition. The results indicated that the gate leakage was decreased two orders of magnitude after the Al2O3/AlGaN interface was pretreated by N2 plasma. Furthermore, effects of N2 plasma pretreatment on the electrical properties of the AlGaN/Al2O3 interface were investigated by x-ray photoelectron spectroscopy measurements and the interface quality between Al2O3 and AlGaN film was improved.

  19. As-cast microstructure of Al-Zn-Mg and Al-Zn-Mg-Cu alloys added erbium

    Institute of Scientific and Technical Information of China (English)

    MAO Jian-wei; JIN Tou-nan; XU Guo-fu; NIE Zuo-ren

    2005-01-01

    The effects of different contents of rare earth element, and erbium, on the as-cast microstructures of Al-6Zn-2Mg and Al-6Zn-2Mg-1.8Cu alloys were studied by optical microscopy, scanning electron microscopy, X-ray diffractometry, transmission electron microscopy and EDS analysis. The results show that the netlike structure of as-cast alloys can be remarkably refined, and the distance of dendritic structure decreases, with Er addition. However, the improvement results on Al-Zn-Mg-Cu are not better than that of Al-Zn-Mg. Er and Al can interact to form Al3Er phase, which is coherent with α(Al) matrix, with trace Er addition to the Al-Zn-Mg alloy. The refinement effect of Al-Zn-Mg alloys is familiar with the formation and precipitation of coherent Al3Er phases. The ternary compound AlCuEr, similar with AlCuSc phase, will form when Er is added to Al-Zn-Mg-Cu alloy, which suppresses the formation of Al3Er phase and doesn't solve in the following heat treatment.

  20. Fabrication of Al/Al3Ti Functionally Graded Materials by Reaction Centrifugal Mixed-Powder Method

    Science.gov (United States)

    El-Hadad, Shimaa; Sato, Hisashi; Miura-Fujiwara, Eri; Watanabe, Yoshimi

    2011-01-01

    Formation of compositional gradient in Al/Al3Ti Functionally graded materials (FGMs) fabricated by the centrifugal method (CM) depends mainly on the centrifugal force and the processing temperature. In this study, a novel centrifugal method, reaction centrifugal mixed-powder method (RCMPM), was proposed to fabricate Al/Al3Ti FGMs under fixed centrifugal force (G=80). The effects of RCMPM processing temperature on the formation of Al3Ti intermetallics, its morphology and its distribution in the fabricated Al/Al3Ti FGMs have been investigated. Fine granular Al3Ti were observed at relatively lower processing temperature while the known coarse platelet-like particles of Al3Ti could be achieved at higher casting temperatures. Moreover, Ti3Al intermetallics compound and unreacted Ti phases are also observed along with Al3Ti particles. In addition, distribution of Al3Ti intermetallics size and their volume fraction showed a significant change when the Al/Al3Ti FGMs processed at different temperatures relative to the liquidus temperature of the master alloy.

  1. Effect of silicon on oxidation of Ni-15Al alloy

    Institute of Scientific and Technical Information of China (English)

    WU Ying; NIU Yan; WU Wei-tao

    2005-01-01

    The oxidation of binary Ni-Al alloy containing 15% (mole fraction, the same below if not mentioned)Al (Ni-15Al), and of a ternary alloy with the same Al content but also containing 4% Si (Ni-4Si-15Al) has been studied at 1 000 ℃ under 1.0× 105Pa O2 to examine the effect of the addition of Si on the oxidation of Ni-15Al. Oxidation of Ni-15Al produces a duplex scale composed of an outer NiO layer and an inner layer riched in Al2O3. On the contrary, Ni-4Si-15Al forms an external alumina layer directly in contact with the alloy presenting only trace of NiO and the Ni-Al spinel. As a result, the kinetics of Ni-15Al shows a fast initial stage followed by two subsequent parabolic stages with decreasing rate constants, while Ni-4Si-15Al presents essentially a single nearly-parabolic behavior with a rate constant similar to that of the final stage of Ni-15Al. Therefore, the addition of 4% Si significantly reduces the oxidation rate during the initial stage by preventing the formation of Ni-riched scales and promoting an earlier development of an exclusive external alumina layer on the alloy surface.

  2. Refining Effect of Boron on Hypoeutectic Al-Si Alloys

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    @@Several concepts of the grain refinement mechanism of B on hypoeutectic Al-Si alloys have been adopted: the refining effect of B on the α-Al and eutectic Si with the different additions of Al-B master alloys made at 850℃ was investigated; and the Al-B master alloys formed under different temperature conditions have been studied to explore the morphologies of AlB2 particles;slowly cooled sample with addition of Al-B was made to explore the refinement mechanism. AlB master alloy can refine not only α-Al, but eutectic Si. Theoretical analysis indicates that,although AlB2 does not take part directly in the nucleation process in pure Al in the presence of Si, it provides a substrate for precipitation of a small content of Si from which α-Al will grow without any undercooling. When the temperature decreases to eutectic line, AlB2 subsequently nucleates eutectic Si; AlB2 particles appear in two different morphologies, namely, hexagonal platelet and tetradehedron morphology which depend on the processing temperature conditions.

  3. Hot Corrosion Performance of AlO-CrO/NiCoCrAlYTa and AlO/NiCoCrAlYTa Coatings Deposited by Atmospheric Plasma Spraying

    Science.gov (United States)

    Tao, Chong; Wang, Lei; Cheng, Nailiang; Hu, Hengfa; Liu, Yang; Song, Xiu

    2016-04-01

    AlO-CrO/NiCoCrAlYTa and AlO/NiCoCrAlYTa coatings were deposited on 316L stainless steel substrate using atmospheric plasma spraying, respectively, in order to improve the oxidation and corrosion resistance. The hot corrosion performance of the coatings at 700 and 900 °C were studied, and the detailed microstructures and phase composition of the coatings were analyzed using x-ray diffraction, scanning electron microscope with energy dispersive spectrometer, and transmission electron microscope. The results show that both coatings are structurally featured by slatted layers, consisting of amorphous phase, Cr2O3, Ni3Al, and Al2O3. The hot corrosion resistance of AlO-CrO/NiCoCrAlYTa coating is better than that of AlO/NiCoCrAlYTa coating. This improvement is attributed to lower porosity and more compact Cr2O3 in AlO-CrO/NiCoCrAlYTa coating which performs better than Al2O3 in blocking further inward progress of corrosion and oxidization.

  4. Micro-structural evaluation of Ti/Al/Ni/Au ohmic contacts with different Ti/Al thicknesses in AlGaN/GaN HEMTs

    Energy Technology Data Exchange (ETDEWEB)

    Mahajan, Somna S., E-mail: somnamahajan@gmail.com; Dhaul, Anuradha; Laishram, Robert; Kapoor, Sonalee; Vinayak, Seema; Sehgal, B.K.

    2014-04-01

    Highlights: • Ohmic contacts with four different Ti/Al metal thickness ratios were fabricated on undoped Al{sub .28}Ga{sub .72}N/GaN HEMT under various annealing cycles using Rapid thermal processor. • Ohmic contact with Ti/Al metal thickness ratio, 1/5 showed superior quality in terms of R{sub c} and surface morphology. • Ni–Al alloy segregation on the surface as analyzed by EDAX seems to be related to bumpy surface morphology. • Ohmic contact with Ti/Al metal ratio 1/5 showed the presence of TiN by X-ray diffraction analysis. This was further confirmed by SIMS analysis. • The lower level of elemental Ti and Al at the surface of the contact with Ti/Al metal thickness ratio 1/5 compared to the other contacts indicated lower oxidation possibility and therefore superior quality ohmic contacts with the metal ratio 1/5. - Abstract: In this work, ohmic contacts were formed by varying the Ti/Al thickness ratio in the metal stack of Ti/Al/Ni/Au on Al{sub .28}Ga{sub .72}N/GaN HEMT epistructure followed by annealing in the temperature range 740–860 °C by rapid thermal processor (RTP). The contacts were electrically characterized for contact resistance (R{sub c}) and the sheet resistance (R{sub s}) of AlGaN/GaN epistructure. The ohmic contacts formed by Ti/Al metal thickness ratio of 1/5 exhibited lowest R{sub c} values and better surface morphology compared to the contacts formed by other Ti/Al metal thickness ratios. The difference observed in the electrical characterization of these contacts was correlated with their X-ray diffraction (XRD) and secondary ion mass spectroscopy (SIMS) analyses. The surface morphology of the ohmic metal post annealing showed two distinct regions in scanning electron microscope (SEM) images. The energy dispersive X-ray analysis (EDAX) identified these regions as Ni–Al and Au–Al rich. Ni–Al rich region is believed to be responsible for rough morphology. Further, the contact formed with Ti/Al metal thickness ratio 1

  5. Penafsiran Sufistik Surat Al-Fatihah dalam Tafsir Tāj Al-Muslimîn dan Tafsir Al-Iklîl Karya KH Misbah Musthofa

    Directory of Open Access Journals (Sweden)

    Iskandar Iskandar

    2015-12-01

    Full Text Available The article explains the sufism tafsir of Surah Al-Fatihah in the tafsir of Tâj Al- Muslimîn and al-Iklîl written by KH. Misbah Musthofa by using tahlili method. The findings shows that 7 verses of Al-fâtihah have Sufism nuances, especially in verse 5, dealing with worship to Allah which consists of 3 levels; low, middle, and high worship. The tafsir of Tâj Al- Muslimîn and al-Iklîl, written by KH. Misbah Musthofa, have some strengths and flaws. The tafsir of Surah Al-Fatihah in Tâj Al- Muslimîn and al-Iklîl are still relevant in this modern era. It is proven by the explanation of the importance model of multi-dimension and multi-function of the human services. Still, from the aspect of the language, it needs some adjustment and modification. So that, to understand Al-Qur’an, as proposed by Muhammed Arkoun by using mystical analysis, such as: reading “ar-rahman ar-rahim”, we do not say or do the action, but we also create the action; hope, forgiveness, confession, or request.

  6. Electrochemical Formation of Al-Li Alloys by Codeposition of Al and Li from LiCl-KCl-AlF3 Melts at 853 K

    Institute of Scientific and Technical Information of China (English)

    SUN Yi; ZHANG Mi-lin; HAN Wei; LI Mei; YANG Yu-sheng

    2013-01-01

    The electrochemical behavior of Al(Ⅲ) ions was studied in molten LiCl-KCl melts on a molybdenum electrode.Cyclic voltammetry,chronopotentiometry and chronoamperometry were used to explore the deposition mechanism of Al and Li.Cyclic voltammetry expriment indicates that under potential deposition(UPD) of lithium on pre-deposited aluminium led to the formation of liquid Al-Li alloys at 853 K.The diffusion coefficient of Al(Ⅲ) ions at 853 K in LiCl-KCl-AlF3(1%,mass fraction) melts was determined to be (2.79±0.05)× 10-5 cm2/s.Chronopotentiograms and chronoamperograms demonstrate that the codeposition of Al(Ⅲ) and Li(Ⅰ) ions formed Al-Li alloys at cathodic current densities higher than-0.28 A/cm2 or cathodic potentials more negative than-2.20 V.X-Ray diffraction(XRD) pattern indicates that Al-Li alloys with different phases formed via galvanostatic electrolysis.Inductively coupled plasma(ICP) analyses of the samples obtained by electrolysis show that lithium and aluminium contents of Al-Li alloys could be controlled by AlF3 concentration and current intensity.

  7. NAZHARIYAH AL-'AMIL WA TADLAFUR AL-QARA'IN INDA TAMMAM HASAN

    Directory of Open Access Journals (Sweden)

    Taufik Luthfi

    2016-06-01

    Full Text Available The researcher attempts to identify the thoughts of Tamman Hassan concerning Tadhafur Al-Qarain and Amil theories in Arabic language grammar. This research is qualitative descriptive research. The data of this reseach based on Tamman Hassan’s legacy concerning the subject of tadhafur al-qarain. This study is based upon two main subjects, namely analysis of the content of the book and compares with the thoughts of other scholars. The study concluded that the new concept devised by Tammam Hassan called tadhafur al-qarain theory. This theory rejects the concept of ‘amil from classic grammar experts in grammatical analysis and understanding of Arabic texts. Tammam Hassan then replaces the concept of ‘amil, by analysis of the link between ma’na and mabna.DOI : 10.15408/a.v3i1.2911

  8. Luminescence dynamics in AlGaN with AlN content of 20%

    KAUST Repository

    Soltani, Sonia

    2016-12-15

    Optical properties and carrier dynamics of an AlGaN layer with an AlN content of 20% have been studied using time-resolved photoluminescence (TR-PL). Despite the high density of defects due to the relatively high AlN content, an intense PL emission from the sample has been detected. Low-temperature PL spectra exhibit several features, accompanied by a strong emission-wavelength dependence of the PL decay time. A significant red-shift of more than 200 meV from the band edge is recorded for the PL emission from localized states. Temperature-dependent PL spectra of the sample are dominated by the emission from localized states and, furthermore, show a relatively slight decrease by almost an order of magnitude with increasing temperature from 45 to 300 K. Our observations indicate strong, spatial localization effects of carriers, resulting in an increase in the radiative recombination rate.

  9. Critical and Impeding Pressures of Al Evaporation during ISM Processing of NiAl

    Institute of Scientific and Technical Information of China (English)

    Guizhong LIU; Jingjie GUO; Yanqing SU; Jingzhe GUO; Jun JIA; Hengzhi FU

    2003-01-01

    In this paper, the critical pressure Pcrit and impeding pressure Pirnpe of the elemental evaporation were defined and studied based on the calculation of the relationship between the evaporation loss rate Nm and the chamber pressure p during melting of NiAl alloys. When the chamber pressure is lower than Perit or higher than Pimpe, Nm tends to be the maximum or minimum value and remains almost unchanged. However, declines sharply with the increase of the chamber pressure when Pcrit<P<Pimpe. A method has been put forward to calculate the Pcrit and Pimpe of Al evaporation in a Ni-XAl (X=25~50 at. pct) melt. The calculation result shows that the pcrit or Pimpe is a second-order function of the molar percentage of Al and the melting temperature.

  10. Reaction diffusion in the NiCrAl and CoCrAl systems

    Science.gov (United States)

    Levine, S. R.

    1978-01-01

    The paper assesses the effect of overlay coating and substrate composition on the kinetics of coating depletion by interdiffusion. This is accomplished by examining the constitution, kinetics and activation energies for a series of diffusion couples primarily of the NiCrAl/Ni-10Cr or CoCrAl/Ni-10Cr type annealed at temperatures in the range 1000-1205 C for times up to 500 hr. A general procedure is developed for analyzing diffusion in multicomponent multiphase systems. It is shown that by introducing the concept of beta-source strength, which can be determined from appropriate phase diagrams, the Wagner solution for consumption of a second phase in a semiinfinite couple is successfully applied to the analysis of MCrAl couples. Thus, correlation of beta-recession rate constants with couple composition, total and diffusional activation energies, and interdiffusion coefficients are determined.

  11. [sup 27]Al nuclear magnetic resonance spectra in CeAl[sub 3] at low temperatures

    Energy Technology Data Exchange (ETDEWEB)

    Hunziker, J. (Lab. fuer Festkoerperphysik, ETH-Hoenggerberg, Zuerich (Switzerland)); Gavilano, J.L. (Lab. fuer Festkoerperphysik, ETH-Hoenggerberg, Zuerich (Switzerland)); Buechi, S. (Lab. fuer Festkoerperphysik, ETH-Hoenggerberg, Zuerich (Switzerland)); Ott, H.R. (Lab. fuer Festkoerperphysik, ETH-Hoenggerberg, Zuerich (Switzerland))

    1994-02-01

    We have measured the nuclear magnetic resonance, NMR, spectra of CeAl[sub 3] at 3.964 MHz, 2.095 MHz and 0.937 MHz in the temperature range between 0.04 K and 20 K. The complicated NMR absorption line of CeAl[sub 3] powder is shown to have more than one component, corresponding to at least two inequivalent Al sites. Below 0.9 K the relative intensity of a broad asymmetric structure increases, and the width of the NMR spectrum shows a rapid increase. At fields of the order of two kilogauss the asymmetry is strongly supressed. The temperature dependence of the asymmetry and width of the spectrum below 0.9 K, can neither be explained in terms of a temperature dependent Knight shift nor in terms of conventional magnetic ordering. (orig.)

  12. Bonding strength of Al/Mg/Al alloy tri-metallic laminates fabricated by hot rolling

    Indian Academy of Sciences (India)

    X P Zhang; M J Tan; T H Yang; X J Xu; J T Wang

    2011-07-01

    One of major drawbacks of magnesium alloy is its low corrosion resistance, which can be improved by using an aluminized coating. In this paper, 7075 Al/Mg–12Gd–3Y–0.5Zr/7075 Al laminated composites were produced by a hot roll bonding method. The rolling temperature was determined based on the flow stresses of Mg–12Gd–3Y–0.5Zr magnesium alloy and 7075 Al alloy at elevated temperature. The bonding strength of the laminate composites and their mechanism were studied. The effects of the reduction ratio (single pass), the rolling temperature, and the subsequent annealing on the bonding strength were also investigated. It was observed that the bonding strength increased rapidly with the reduction ratio and slightly with the rolling temperature. The bonding strength increases with the annealing time until the annealing time reaches 2 h and then decreases. The mechanical bond plays a major role in the bonding strength.

  13. NAZHARIYAH AL-'AMIL WA TADLAFUR AL-QARA'IN INDA TAMMAM HASSAN

    Directory of Open Access Journals (Sweden)

    Taufik Luthfi

    2016-06-01

    Full Text Available The researcher attempts to identify the thoughts of Tamman Hassan concerning Tadhâfur al-Qarâ'in and 'Amil theories in Arabic language grammar. This research is qualitative descriptive research. The data of this reseach based on Tamman Hassan’s legacy concerning the subject of tadhafur al-qarain. This study is based upon two main subjects, namely analysis of the content of the book and compares with the thoughts of other scholars. The study concluded that the new concept devised by Tammam Hassan called tadhafur al-qarain theory. This theory rejects the concept of ‘amil from classic grammar experts in grammatical analysis and understanding of Arabic texts. Tammam Hassan then replaces the concept of ‘amil, by analysis of the link between ma’na and mabna.

  14. Control of Defects in Aluminum Gallium Nitride ((Al)GaN) Films on Grown Aluminum Nitride (AlN) Substrates

    Science.gov (United States)

    2013-02-01

    like HEMTs . A nanolayer of AlGaN over GaN provides extra 2DEG charge density because of the piezoelectric effect of the AlGaN layer. The higher...Control of Defects in Aluminum Gallium Nitride ((Al) GaN ) Films on Grown Aluminum Nitride (AlN) Substrates by Iskander G. Batyrev, Chi-Chin Wu...Aluminum Gallium Nitride ((Al) GaN ) Films on Grown Aluminum Nitride (AlN) Substrates Iskander G. Batyrev and N. Scott Weingarten Weapons and

  15. The extraordinary role of the AlN interlayer in growth of AlN sputtered on Ti electrodes

    Science.gov (United States)

    Tran, A. T.; Pandraud, G.; Tichelaar, F. D.; Nguyen, M. D.; Schellevis, H.; Sarro, P. M.

    2013-11-01

    The structure of AlN layers grown on Ti with and without an AlN interlayer between the Si substrate and the Ti layer is investigated. The AlN grains take over the orientation of the Ti columnar grains in both cases. Surprisingly, the Ti grains do not take over completely the orientations of the AlN grains of the interlayer, and show the same columnar grain structure as the sample without interlayer. Hence, the structure of the AlN top layer is independent of the presence of an AlN interlayer below the Ti layer and is mainly determined by the Ti layer microstructure.

  16. Growth of AlGaN Epitaxial Film with High Al Content by Metalorganic Chemical Vapour Deposition

    Institute of Scientific and Technical Information of China (English)

    WANG Xiao-Lan; ZHAO De-Gang; YANG Hui; LIANG Jun-Wu

    2007-01-01

    A high-Al-content AlCaN epilayer is grown on a low-temperature-deposited AlN buffer on (0001) sapphire bylow pressure metalorganic chemical vapour deposition. The dependence of surface roughness, tilted mosaicity,and twisted mosaicity on the conditions of the AlCaN epilayer deposition is evaluated. An AlCaN epilayer withfavourable surface morphology and crystal quality is deposited on a 20nm low-temperature-deposited AlN buffer at a low Ⅴ/Ⅲ flow ratio of 783 and at a low reactor pressure of 100 Torr, and the adduct reaction between trimethylaluminium and NH3 is considered.

  17. Nikah Sirri Menurut Perspektif Al-Quran

    Directory of Open Access Journals (Sweden)

    Ali Akbar

    2014-12-01

    Full Text Available Nikah sirri atau lazim juga disebut nikah bawah tangan dalam konteks masyarakat Indonesia adalah pernikahan yang dilakukan oleh wali atau wakil wali dan disaksikan oleh para saksi, tetapi tidak dilakukan di hadapan Petugas Pencatat Nikah (PPN sebagai aparat resmi pemerintah atau perkawinan yang tidak dicatatkan di Kantor Urusan Agama (KUA, sehingga dengan sendirinya tidak mempunyai Akta Nikah yang dikeluarkan oleh pejabat yang berwenang. Terjadinya nikah sirri, antara lain disebabkan karena hamil di luar nikah, faktor tekanan ekonomi, ingin melakukan poligami secara diam-diam karena takut terjerumus dalam pergaulan bebas, atau karena ingin menghindar dari peraturan yang berlaku. Meskipun nikah tersebut dinilai sah, namun Rasul menyuruh masyarakat yang menikah untuk mengumumkan pernikahannya dengan walimah (kenduri/ syukuran, guna untuk menghindari dari fitnah. Selain dapat menimbukkan dampak negatif, nikah sirri dapat pula menimbulkan/dosa bagi pelakupelakunya, karena melanggar ketentuan yang ditetapkan oleh pemerintah (ulul amri. Sementara al-Quran memerintahkan setiap muslim untuk menta’ati ulul amri selama tidak bertentangan dengan hukum Allah. Dalam hal pencatatan tersebut, ia bukan saja tidak bertentangan, tetapi justru sangat sejalan dengan semangat al-Quran.

  18. Berkeley Lab's ALS generates femtosecond synchrotron radiation

    CERN Document Server

    Robinson, A L

    2000-01-01

    A team at Berkeley's Advanced Light Source has shown how a laser time-slicing technique provides a path to experiments with ultrafast time resolution. A Lawrence Berkeley National Laboratory team has succeeded in generating 300 fs pulses of synchrotron radiation at the ALS synchrotron radiation machine. The team's members come from the Materials Sciences Division (MSD), the Center for Beam Physics in the Accelerator and Fusion Research Division and the Advanced Light Source (ALS). Although this proof-of principle experiment made use of visible light on a borrowed beamline, the laser "time-slicing" technique at the heart of the demonstration will soon be applied in a new bend magnet beamline that was designed specially for the production of femtosecond pulses of X-rays to study long-range and local order in condensed matter with ultrafast time resolution. An undulator beamline based on the same technique has been proposed that will dramatically increase the flux and brightness. The use of X-rays to study the c...

  19. Arte, derecho y derecho al arte

    Directory of Open Access Journals (Sweden)

    Rubén Martínez Dalmau

    2014-07-01

    Full Text Available El artículo defiende que existe un derecho subjetivo al arte fundamentado en la autonomía del arte, que lo diferencia de otras formas expresivas; en la capacidad de apropiación subjetiva del arte exclusivamente por parte de los seres humanos; en las posibilidades del arte para la construcción de formas de expresión varias; y en el potencial uso del arte en políticas públicas propias de los sistemas democráticos, que ayudaría al derecho a la paz y a la reconciliación, así como formas alternativas de reparación y rehabilitación en sociedad. La exclusividad de la relación del hombre con el arte fundamentaría su objetivación y, por ello, lo convertiría en un derecho jurídicamente exigible.

  20. CarbAl Heat Transfer Material

    Science.gov (United States)

    Fink, Richard

    2015-01-01

    The increasing use of power electronics, such as high-current semiconductor devices and modules, within space vehicles is driving the need to develop specialty thermal management materials in both the packaging of these discrete devices and the packaging of modules consisting of these device arrays. Developed by Applied Nanotech, Inc. (ANI), CarbAl heat transfer material is uniquely characterized by its low density, high thermal diffusivity, and high thermal conductivity. Its coefficient of thermal expansion (CTE) is similar to most power electronic materials, making it an effective base plate substrate for state-of-the-art silicon carbide (SiC) super junction transistors. The material currently is being used to optimize hybrid vehicle inverter packaging. Adapting CarbAl-based substrates to space applications was a major focus of the SBIR project work. In Phase I, ANI completed modeling and experimentation to validate its deployment in a space environment. Key parameters related to cryogenic temperature scaling of CTE, thermal conductivity, and mechanical strength. In Phase II, the company concentrated on improving heat sinks and thermally conductive circuit boards for power electronic applications.

  1. Cysteine Modifications in the Pathogenesis of ALS

    Science.gov (United States)

    Valle, Cristiana; Carrì, Maria Teresa

    2017-01-01

    Several proteins are found misfolded and aggregated in sporadic and genetic forms of amyotrophic lateral sclerosis (ALS). These include superoxide dismutase (SOD1), transactive response DNA-binding protein (TDP-43), fused in sarcoma/translocated in liposarcoma protein (FUS/TLS), p62, vasolin-containing protein (VCP), Ubiquilin-2 and dipeptide repeats produced by unconventional RAN-translation of the GGGGCC expansion in C9ORF72. Up to date, functional studies have not yet revealed a common mechanism for the formation of such diverse protein inclusions. Consolidated studies have demonstrated a fundamental role of cysteine residues in the aggregation process of SOD1 and TDP43, but disturbance of protein thiols homeostatic factors such as protein disulfide isomerases (PDI), glutathione, cysteine oxidation or palmitoylation might contribute to a general aberration of cysteine residues proteostasis in ALS. In this article we review the evidence that cysteine modifications may have a central role in many, if not all, forms of this disease. PMID:28167899

  2. Mujeres musulmanas situadas en torno al poder

    Directory of Open Access Journals (Sweden)

    Paulina López Pita

    2002-01-01

    Full Text Available Aunque sabemos que en el Islam la mujer, en términos generales, estaba excluida del poder, encontramos haciendo un breve repaso en el Islam medieval que muchas mujeres desempeñaron un papel político de cierta importancia, de manera especial, entre las dinastías nacidas en Asia Central. Asimismo, fueron también numerosas las mujeres que ejercieron una notable influencia en el gobierno tanto a través de sus maridos como actuando como regentes de sus hijos en al-Andalus y en el norte de África. Es por tanto a estas mujeres que ejercieron el poder entre los musulmanes a las que dedicamos estas líneas.Although it is known that in the Islamic worid, women in general, couldn't access to power, we find that looking back at the middie age period, women didn't only particípate in military campaigns, but as well they played their role of certain importance in politics, specially among dynasties coming from Central Asia. At the same time, there were a number of women who had influence in the political power, both acting through their husbands, and as regents of their children in Al - Andalus, and in North África. Therefore, we dedícate the following text to these women with political power among the Muslims.

  3. TBK1 is associated with ALS and ALS-FTD in Sardinian patients.

    Science.gov (United States)

    Borghero, Giuseppe; Pugliatti, Maura; Marrosu, Francesco; Marrosu, Maria Giovanna; Murru, Maria Rita; Floris, Gianluca; Cannas, Antonino; Occhineri, Patrizia; Cau, Tea B; Loi, Daniela; Ticca, Anna; Traccis, Sebastiano; Manera, Umberto; Canosa, Antonio; Moglia, Cristina; Calvo, Andrea; Barberis, Marco; Brunetti, Maura; Gibbs, J Raphael; Renton, Alan E; Errichiello, Edoardo; Zoledziewska, Magdalena; Mulas, Antonella; Qian, Yong; Din, Jun; Pliner, Hannah A; Traynor, Bryan J; Chiò, Adriano

    2016-07-01

    Recently, mutations in the TANK-binding kinase 1 (TBK1) gene were identified as a cause for amyotrophic lateral sclerosis (ALS) with or without comorbid frontotemporal dementia. We have assessed the frequency and clinical characteristics of TBK1 mutations in a cohort of ALS patients of Sardinian ancestry. Whole-exome sequencing was performed on Hiseq2000 platform (Illumina). Genome analysis Toolkit was used to align and to code variants according to Human Genome (UCSC hg19). Mutation was confirmed with Sanger sequence. In our screening of 186 Sardinian ALS cases, we found 3 (1.6%) patients carrying 3 distinct novel genetic variants: a nonsynonymous SNV c.1150C>T leading to a p.Arg384Thr change in exon 9; a nonsynonymous SNV c.1331G>A causes a p.Arg444Gln change in exon 11; and a frameshift deletion c.2070delG (p.Met690fs) at the exon 20 of the gene leading to a stop at 693 codon. The latter patients also carried missense mutation c.98C>T of the SQSTM1 gene causing a substitution of an arginine with a valine at the position 33 (p.Arg33Val). All variants were found to be deleterious according to in silico predictions. All cases were apparently sporadic and one of them showed frontotemporal dementia associated to ALS. These mutations were not found in 2 cohorts of 6780 ethnic-matched controls. We have found that TBK1 mutations account for 1.6% of Sardinian ALS cases. Our data support the notion that TBK1 is a novel ALS gene, providing important evidence complementary to the first descriptions.

  4. PEMIKIRAN POLITIK HASAN AL-BANNA

    Directory of Open Access Journals (Sweden)

    Rusmala Dewi

    2015-09-01

    Full Text Available Abstract: Hasan al Banna, one of Islamic prominent figures,was born at the end of 20 tahun century. His ideas andmovement together with ikhwanul Muslimin had arousedfighting spirit of Islamic society in order not be left behind.Returning to the life inspired by al-quran and as sunnah is themission of the movement led by Hasan al Banna. Although thisIslamic renewal figure had passed away, his thoughts still existin Islamic society’s life. Therefore, Hasan al-Banna’s thoughtswill be discussed in this article especially his political ideas .ملخص: ولد حسن البنا، واحدة من الشخصیات البارزة الإسلامیة ، في نھایة القرن20 . قد أفكاره و الحركة جنبا إلى جنب مع" الإخوان والمسلمین" أثار الروح القتالیةللمجتمع الإسلامي لكي لا أن تترك وراءھا. وبالعودة إلى الحیاة مستوحاة من آل القرآنو السنة كما ھي مھمة الحركة التي یقودھا حسن البنا. على الرغم من أن ھذا الرقمالتجدید الإسلامي قد وافتھ المنیة، أفكاره لا تزال موجودة في الحیاة المجتمع الإسلامي.لذلك، سیتم مناقشة الأفكار حسن البنا في ھذه المقالة خاصة أفكاره السیاسیةKata Kunci: Hasan al-Banna, Islam dan Politik.

  5. Al-Jazeera... varsti BBC asemel / Merle Krigul

    Index Scriptorium Estoniae

    Krigul, Merle

    2005-01-01

    Ülemaailmne televisiooni-impeerium, mille üks osa on ka uudistekanal Al-Jazeera, kavatseb laieneda. Tulemas on uus Al-Jazeera lastekanal ja spordikanal, rahvusvaheline inglisekeelse uudistekanal. Lisa: BBC püüab araabiakeelset turgu

  6. Microstructure and properties of Mg-Al binary alloys

    Directory of Open Access Journals (Sweden)

    ZHENG Wei-chao

    2006-11-01

    Full Text Available The effects of different amounts of added Al, ranging from 1 % to 9 %, on the microstructure and properties of Mg-Al binary alloys were investigated. The results showed that when the amount of added Al is less than 5%, the grain size of the Mg-Al binary alloys decreases dramatically from 3 097 μm to 151 μm with increasing addition of Al. Further addition of Al up to 9% makes the grain size decrease slowly to 111 μm. The α-Mg dendrite arms are also refined. Increasing the amount of added Al decreases the hot cracking susceptibility of the Mg-Al binary alloys remarkably, and enhances the micro-hardness of the α-Mg matrix.

  7. Identiteit als opgave: over techniek, zelfvorming en idealen

    NARCIS (Netherlands)

    Aydin, Ö.

    2012-01-01

    De analytische filosofie begrijpt ‘persoonlijke identiteit’ als in beginsel onafhankelijk van externe invloeden. Poststructuralisten als Michel Foucault, Jacques Derrida en Judith Butler verdedigen de stelling dat relaties en interacties de menselijke identiteit vormen. Identiteit is voor deze auteu

  8. The Refining Effect of Al-Ti-B-Sr Master Alloy on the Al- Si - Mg Alloy%Al-Ti-B-Sr对Al-Si-Mg合金的变质细化作用

    Institute of Scientific and Technical Information of China (English)

    亓效刚; 王玉厚; 边秀房

    2000-01-01

    用快速凝固和热变形处理的Al-Ti-B-Sr中间合金.对Al-Si-Mg铝轮毂材料进行处理.试验结果表明:Al-Ti-B-Sr中间合金可以对Al-7Si-0.35Mg合金有效地细化与变质;改善Al-Ti-B-Sr的细化与变质效果,Al-Si-Mg合金的抗拉强度和延伸率较Al-Ti-B、Al-Sr两种中间合金分别加入时提高了约10%和25%.

  9. Microstructure and properties of Mg-Al binary alloys

    Institute of Scientific and Technical Information of China (English)

    ZHENG Wei-chao; LI Shuang-shou; TANG Bin; ZENG Da-ben

    2006-01-01

    The effects of different amounts of added Al, ranging from 1% to 9%, on the microstructure and properties of Mg-Al binary alloys were investigated. The results showed that when the amount of added Al is less than 5%, the grain size of the Mg-Al binary alloys decreases dramatically from 3 097 μm to 151 μm with increasing addition of Al. Further addition of Al up to 9% makes the grain size decrease slowly to 111 μm. The α-Mg dendrite arms are also refined. Increasing the amount of added Al decreases the hot cracking susceptibility of the Mg-Al binary alloys remarkably, and enhances the micro-hardness of the α-Mg matrix.

  10. Additional force field in cooling process of cellular Al alloy

    Institute of Scientific and Technical Information of China (English)

    郑明军; 何德坪; 戴戈

    2002-01-01

    The foaming process of Al alloy is similar to that of Al, but there is a solid-liquid state zone in the solidification process of cellular Al alloy which does not exist in the case of Al. In the unidirectional solidification of cellular Al alloy, the proportion of the solid phase gradually reduces from the solid front to the liquid front. This will introduce a force and result in a serious quick shrinkage. By the mathematic and physical mode, the solidification of the cellular Al alloy is studied. The data measured by experiment are close to the result calculated by the mode. This kind of shrinkage can be solved by suitable cooling method in appropriate growth stage. The compressive strength of the cellular Al alloy made by this way is 40% higher than that of cellular Al.

  11. Effect of al content on reaction laser sintering of Ni-Al powder

    Directory of Open Access Journals (Sweden)

    Qin L.

    2008-01-01

    Full Text Available Laser reactive sintering, i.e., laser-induced self-propagating reaction sintering synthesis was used for the preparation of nickel aluminide intermetallic compounds. The experimental parameters controlling the ignition step such as ignition time and adiabatic temperature were calculated as a function of initial stoichiometry. Al mole ratio in initial powder mixture was varied from 25% to 50% for controlling adiabatic temperature. The increase in Al powder content resulted in the rise in adiabatic temperature and the morphology change of nickel aluminide compounds from needle-like to blocky.

  12. Numerical modelling of microstructure forming process for Al-Al3Fe eutectic alloy

    Institute of Scientific and Technical Information of China (English)

    李荣德; 周振平

    2003-01-01

    A self-adjusting model was presented on the basis of the effect of temperature gradient on eutectic growth and a curved solid/liquid interface. Finite differential method was adopted to solve the model. The average lamellar spacing of the Al-Al3Fe eutectic alloy and the content fields ahead of the solidifying interface under different growth rates were calculated. Directional solidification experiments were carried out in order to prove the modification of the modeling. The experimental results are in relatively good agreement with the calculations.

  13. Analysis of energy autocorrelation functionsin dissipative heavy ion collision of 27Al+27Al

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    The excitation functions were measured in the reaction of27Al+27Al at incidentenergies from 114 MeV to 127 MeV in steps of 200 keV. Thedetection angles were continuouslycovered from 10 to 57 in the laboratory system. Theenergy autocorrelation functions of the dissipativefragmentswere analyzed by using different approaches. The nonself-averaging oscillations in theexcitation functions were considered due to the angular momentum coherence and damping ofthe coherent nuclear rotation. The damping results from a quantum chaotic motion.

  14. Disorder in Al-li-cu and Al-mn-si icosahedral alloys.

    Science.gov (United States)

    Heiney, P A; Bancel, P A; Horn, P M; Jordan, J L; Laplaca, S; Angilello, J; Gayle, F W

    1987-10-30

    Faceted dendrites of icosahedral AL(6)Li(3)Cu have been studied by high-resolution x-ray scattering. The samples display long-range icosahedral symmetry both in their diffraction patterns and in their macroscopic morphology. Despite the appearance of well-defined facets, the samples have a high degree of atomic disorder. The Bragg peaks have symmetry-dependent shapes and widths that scale linearly with G perpendicular (phason momentum). The peak widths are surprisingly similar to those found in icosahedral Al-Mn-Si alloys in both their absolute magnitude and their dependence on G perpendicular. The origin of these features in models for the icosahedral phase is discussed.

  15. Kisah Cinta Platonik Jalâl al-Dîn al-Rûmî

    Directory of Open Access Journals (Sweden)

    Zayyin Alfi Jihad

    2015-10-01

    Full Text Available The research attempts to discover and find the very roots of love concept by Jalâl al-Dîn Rûmî to develop Sufism method, which connects human’s hearts with their God. This study employs philosophical qualitative method, which tends to be descriptive and interpretative. Using the basis of love, Jalâl al-Dîn Rûmî built sufistic epistemological foundation in the form of mystical poems. Poems are means of spiritual pilgrimage, which is performed in order to find the culmination of fusion ectacy between human and their God, i.e. Allah The Almighty.

  16. Preparation of SiCp/Al2O3-Al Composites by Directed Metal Oxidation

    Institute of Scientific and Technical Information of China (English)

    LIN Ying; YANG Hai-bo; WANG Fen; ZHU Jian-feng

    2006-01-01

    SiCp/Al2O3-Al composites were synthesized by means of direct metal oxidation method. The composition and microstructures of the composites were investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM) and metallurgical microscope. The effects of technical parameters on the properties of the product were analyzed. The results indicate that the composite possesses a dense microstructure, composed of three interpenetrated phases. Of them, SiO2 layer prohibits the powdering of the composites; Mg promotes the wetting and infiltration of the system and Si restricts the interfacial reaction while improving the wetting ability between reinforcement and matrix.

  17. REFLEXIONES ASOCIADAS AL ROL DOCENTE Y AL APRENDIZAJE SIGNIFICATIVO EN LA UNIVERSIDAD DEL SIGLO XXI

    OpenAIRE

    Galvis Arcila, Sebastián; Universidad Antonio Nariño

    2015-01-01

    En este ensayo se realiza una aproximación reflexiva en torno al nuevo rol docente y al aprendizaje significativo en el contexto universitario del siglo XXI. Para ello se parte de una premisa humanizadora de la educación que se articula con nodos de interés tales como la discusión actual sobre la crisis educativa y sus connotaciones socioculturales particulares, la crítica a la transformación pedagógica carente de insinuaciones prácticas, la descripción de la relación docente –estudiante desd...

  18. Conocer y comprender al otro: la comunicación intercultural de Al-Qaeda

    OpenAIRE

    Evelyn Norma Castro Méndez

    2013-01-01

    La red islamista Al-Qaeda es una de las organizaciones más conocidas en el mundo occidental. En este artículo se presentan los resultados de un análisis discursivo realizado a los mensajes emitidos por la red en el marco de los atentados contra Estados Unidos (2001), Madrid (2004) y Londres (2005), con el fin de responder a las siguientes preguntas: ¿cuál fue el propósito de estos mensajes y qué nos dicen de sus emisores? Al estudiar estos procesos de comunicación intercultural se obtendrán e...

  19. Derechos emergentes en regiones emergentes: el derecho al agua potable y al saneamiento en Asia Central

    OpenAIRE

    Saura Estapà, Jaume

    2011-01-01

    El derecho humano al agua potable y al saneamiento viene afirmándose de manera cada vez más rotunda en el plano internacional. Supone la capacidad de cada ser humano de acceder a agua limpia y segura de manera asequible, y la obligación correlativa de los Estados de garantizar y proteger este derecho. Los Estados de Asia Central disponen de agua suficiente para garantizar este derecho a todos sus ciudadanos, pero la mala gestión y el despilfarro hace que algunas zonas, sobre todo rurales, ten...

  20. Growth of Al on a W(110) surface

    Energy Technology Data Exchange (ETDEWEB)

    Choi, D.S., E-mail: dschoi@kangwon.ac.kr; Kim, D.H.

    2012-07-01

    Using low energy electron diffraction and low energy ion scattering spectroscopy, we investigated the growth mode of Al on a W(110) surface at room temperature and at 1000 K. We found that Al grew on the W(110) surface in the Frank-van der Merwe mode when the W substrate was kept at room temperature during Al deposition. It was found that at a coverage higher than 2 monolayer (ML) in Al grown at room temperature, Al atoms had a well-ordered face centered cubic (fcc) (111) surface. The [11{sup Macron }0] direction of the Al grown at room temperature on the (111) surface was parallel to the [001] direction of the W(110) substrate surface. When the temperature of the W substrate was kept at 1000 K, the adsorbed Al atoms grew in the Volmer-Weber mode. The 1.5 ML Al/W(110) surface prepared at 1000 K shows two domains of the fcc Al(111) surfaces along with a W(110) surface. We also found that the early stage of Al film growth shows W(110) structure. However as the film becomes thicker (above 3.5-4 layers) the Al face is turned into fcc (111) face. - Highlights: Black-Right-Pointing-Pointer We investigated the growth behavior of Al on the W(110) surface. Black-Right-Pointing-Pointer Al grew in the Frank-van der Merwe mode when the W was kept at room temperature. Black-Right-Pointing-Pointer Al grew in the Volmer-Weber mode when the W was kept at 1000 K. Black-Right-Pointing-Pointer The Al film grown at room temperature has the (111) surface. Black-Right-Pointing-Pointer [11{sup Macron }0] direction on the Al(111) was the same as [001] on the W(110) substrate.

  1. Characteristics of 8-junction Al single-electron trap

    CERN Document Server

    So, H M; Park, J W; Yoo, K H; Lee, J O; Kim, J J

    2000-01-01

    Single-electron trap, consisting of 8 Al/Al sub 2 O sub 3 /Al tunnel junctions, was fabricated and characterized in normal and superconducting states of Al. The output current of the single-electron transistor exhibited plateaus and hysteresis with varying trap voltage, which was attributed to trapping and releasing of electrons. The activation energy obtained from the voltage interval between current plateaus was consistent with the estimated value.

  2. ELECTRONIC STRUCTURE OF CLUSTER ASSEMBLED Al12C (Si) SOLID

    Institute of Scientific and Technical Information of China (English)

    QUAN HONG-JUN; GONG XIN-GAO

    2000-01-01

    The electronic structures of the cluster-assembled solid Al12C (Si) are studied by the ab initio method. We find that Al12C (Si) can solidify into a van der Waals solid. The electronic band structures show very weak dispersion. The main features in the electronic structure of cluster are retained in the solid, and an energy gap up to about 1.5 eV is observed for Al12C and Al12Si solids.

  3. MEMBEDAH MUSNAD AL-HUMAYDÎ: SALAH SATU MUSNAD HADITS TERTUA

    Directory of Open Access Journals (Sweden)

    Syukron Affani

    2015-07-01

    Full Text Available Al-Humaydî is one of the figures of hadist from Mecca area. He belongs to the main generation as the follower of tâbi`în who lived and gathered with one of the chiefs of fiqh Madzhab, which is Muhammad bin Idris al-Syâfi’î. Thus, al-Humaydî belongs to the earliest ulama of madzhab Syâfi’î. In the knowledge of Hadist, al-Humaydî and his Musnad book becomes the part of the early musnad kitab even earlier than the most popular musnad book by Ahmad bin Hanbal. Although musnad book of al-Humaydî is not the most popular book but this book belongs to the most important musnad Hadist book. Al-Bukhârî as a popular Mukharrij takes Hadist from al-Humaydî with least corrections. Al-Humaydî is the teacher of al-Bukhârî in Hadist and also for fiqh. This proves that the figure of al-Humaydî as the reader of hadist is believable. But, not all the Hadist in the musnad al-Humaydî is shahîh/true. Some of the munqathi’ Hadist which is told by al-Humaydî and al-Bukhârî knew this. This writing is trying to partly introduce and give some notes of al-Humaydî and his musnad. Therefore we will know one of the ancient Hadist books and know the figures of the one who arrange and understand the musnad Hadist book. Kata Kunci:Al-Humaydî , Musnad, Hadits, al-Bukhârî

  4. Mechanisms of elevated-temperature deformation in the B2 aluminides NiAl and CoAl

    Science.gov (United States)

    Yaney, D. L.; Nix, W. D.

    1988-01-01

    A strain rate change technique, developed previously for distinguishing between pure-metal and alloy-type creep behavior, was used to study the elevated-temperature deformation behavior of the intermetallic compounds NiAl and CoAl. Tests on NiAl were conducted at temperatures between 1100 and 1300 K while tests on CoAl were performed at temperatures ranging from 1200 to 1400 K. NiAl exhibits pure-metal type behavior over the entire temperature range studied. CoAl, however, undergoes a transition from pure-metal to alloy-type deformation behavior as the temperature is decreased from 1400 to 1200 K. Slip appears to be inherently more difficult in CoAl than in NiAl, with lattice friction effects limiting the mobility of dislocations at a much higher tmeperature in CoAl than in NiAl. The superior strength of CoAl at elevated temperatures may, therefore, be related to a greater lattice friction strengthening effect in CoAl than in NiAl.

  5. Simulation Study of Al-1Mn/Al-10Si Circular Clad Ingots Prepared by Direct Chill Casting

    Science.gov (United States)

    Wu, Li; Kang, Huijun; Chen, Zongning; Fu, Ying; Wang, Tongmin

    2016-02-01

    A modified direct chill casting process based on Novelis FusionTM Technology co-casting process was used recently to prepare Al-1Mn/Al-10Si circular clad ingots. In the current study, a comprehensive simulation model was developed to investigate the direct chill casting process for preparing the Al-1Mn/Al-10Si circular clad ingots, and a parametric study and experimental research of the direct chill casting process was conducted to explore potential success and failure casting conditions. The simulation results revealed the bonding mechanism of the Al-1Mn/Al-10Si interface in the direct chill casting process and identified the effect of certain parameters on casting performance. The results indicated that the effect of casting speed and Al-1Mn casting temperature on the variations of the minimum solid fraction of Al-1Mn at the interface is stronger than that of cooling water flow rate in inner mold, while Al-10Si casting temperature is the weakest of the four casting parameters. The corresponding experimental results verified that Al-1Mn/Al-10Si circular clad ingot with acceptable metallurgical bonding can be successfully prepared by direct chill casting process under the proper casting parameters. The thickness of diffusion zone is about 40 μm, and the fractured position in tensile test was located in the Al-1Mn alloy side which indicated the strength of the interfacial region is higher than that of Al-1Mn alloy.

  6. Comparison on the interaction of Al3+/nano-Al13 with calf thymus DNA /salmon sperm DNA

    Science.gov (United States)

    Ma, Fei; Ma, Yue; Du, Changwen; Yang, Xiaodi; Shen, Renfang

    2015-11-01

    The conformation change, binding mode and binding site between Al3+/nano-Al13 and calf thymus DNA/salmon sperm DNA were investigated by UV-vis absorption, FTIR spectra, Raman spectroscopy and CD spectra, as well as melting curves measurement. The UV-vis spectra and circular dichroism spectra results suggested that the phosphate group structure was changed when Al3+ interacted with DNA, while the double-helix was distorted when nano-Al13 interacted with DNA. The FTIR and Raman spectroscopy revealed that the binding sites were Al3+ … PO2, Al3+ … N7/guanine PO2 … Al13 … N7-C8/guanine with calf thymus DNA, and Al3+ … N3-O2/cytosine, Al3+ … N7-C8/guanine, PO2 … Al13 … N7-C8/guanine, PO2 … Al13 … N1/adenine with salmon sperm DNA, respectively. The electrostatic binding was existed between Al3+ and DNA, and the electrostatic binding and complexing were found between nano-Al13 and DNA.

  7. Effect of Al on the Wetting Behavior Between TiC x and Molten Ti-Al Alloys

    Science.gov (United States)

    Liu, Xuyang; Lv, Xuewei; Dong, Hongbiao; Li, Chunxin; Bai, Chenguang

    2015-10-01

    The wetting behavior and the interfacial reactions between TiC x substrate and molten Ti-Al alloys with different Al contents were studied using the Sessile Drop method at 1758 K (1485 °C) in argon atmosphere. It is found that the wettability and interface reaction products depend on Al content in the molten alloy. The initial contact angles between the molten Ti-Al alloy and TiC0.78 surface reduces from 110 to 80 deg when Al content in the alloy changes from 40 to 80 wt pct. The reduction in the initial contact angle is due to the decrease of surface tension of the molten Ti-Al alloys with increasing Al contents. The segregation of Al atoms to the surface occurred at all bulk concentrations of Ti-Al alloys. Al with lower surface tension tends to segregate on the surface of liquid Ti-Al alloy. In the spreading stage, the interfacial reaction led to the decrease in the contact angle. The adhesion in Ti-Al/TiC x system can be interpreted in terms of strong chemical interactions, which is greatly affected by the diffusion of C. The equilibrium contact angle was measured less than 10 deg. Finally, the reaction sequence at the Ti-Al melt and TiC x substrate interface is proposed.

  8. Effect of Al Doping on Optical Band Gap Energy of Al-TiO2 Thin Films.

    Science.gov (United States)

    Song, Yo-Seung; Kim, Bae-Yeon; Cho, Nam-Ihn; Lee, Deuk Yong

    2015-07-01

    Al-TiO2 thin films were prepared using a sol-gel derived spin coating by varying the Al/Ti molar ratio from 0 to 0.73 to investigate the effect of Al doping on the optical band gap energy (Eg) of the films. GAXRD results indicated that Al-TiO2 is composed of anatase and FTO phases when the Al/Ti molar ratio was less than 0.18. Above 0.38, no other peaks except FTO were found and transparency of the films was severely deteriorated. Eg of Al-TiO2 decreased from 3.20 eV to 2.07 eV when the Al/Ti ratio was raised from 0 to 0.38. Eg of 2.59 eV was found for the anatase Al-TiO2 films having the Al/Ti ratio of 0.18. The absorption band of Al-TiO2 coatings shifted dramatically from the UV region to the visible region with increasing the amount of Al dopant. The Al doping was mainly attributed to the optical band gap energy of Al-TiO2.

  9. Fabrication of Al/AlOx/Al Josephson junctions and superconducting quantum circuits by shadow evaporation and a dynamic oxidation process

    Institute of Scientific and Technical Information of China (English)

    Wu Yu-Lin; Deng Hui; Yu Hai-Feng; Xue Guang-Ming; Tian Ye; Li Jie; Chen Ying-Fei

    2013-01-01

    Besides serving as promising candidates for realizing quantum computing,superconducting quantum circuits are one of a few macroscopic physical systems in which fundamental quantum phenomena can be directly demonstrated and tested,giving rise to a vast field of intensive research work both theoretically and experimentally.In this paper we report our work on the fabrication of superconducting quantum circuits,starting from its building blocks:Al/AlOx/Al Josephson junctions.By using electron beam lithography patterning and shadow evaporation,we have fabricated aluminum Josephson junctions with a controllable critical current density (jc) and wide range of junction sizes from 0.01 μm2 up to 1 μm2.We have carried out systematical studies on the oxidation process in fabricating Al/AlOx/Al Josephson junctions suitable for superconducting flux qubits.Furthermore,we have also fabricated superconducting quantum circuits such as superconducting flux qubits and charge-flux qubits.

  10. Laser clad AlSiCuNi functionally graded coatings

    NARCIS (Netherlands)

    Pei, Yutao; de Hosson, J.T.M.; Brebbia, CA

    2001-01-01

    This paper presents an exploration of laser clad AlSiCuNi-alloy FGCs on cast Al-alloy substrates. SEM microstructure observations indicate that, besides Si primary particles, hard Al3Ni2 compounds also exhibits a continuous increase in both particle sizes and volume fractions from the bottom to the

  11. Motor neuron death in ALS – programmed by astrocytes?

    Science.gov (United States)

    Pirooznia, Sheila K.; Dawson, Valina L.; Dawson, Ted M.

    2014-01-01

    Motor neurons in ALS die via cell-autonomous and non-cell autonomous mechanisms. Using adult human astrocytes and motor neurons, Re et al (2014) discover that familial and sporadic ALS derived human adult astrocytes secrete neurotoxic factors that selectively kill motor neurons through necroptosis, suggesting a new therapeutic avenue. PMID:24607221

  12. Al-Zarqawi - terrorist või kangelane? / Kalev Kask

    Index Scriptorium Estoniae

    Kask, Kalev

    2005-01-01

    Ilmunud ka: Meie Maa 29. juuni lk. 5. Jordaanias sündinud palestiinlane Abu Musab al-Zarqawi, õige nimega Ahmed Fadel al-Khalaylah, on rühmituse Jama'at al-Tawhid wal Jihad juht ja hetkel kuulsaim sõjapealik Iraagis, kes on pühendanud oma elu võitlusele USA vastu

  13. Rapid solidification of undercooled Al-Cu-Si eutectic alloys

    Institute of Scientific and Technical Information of China (English)

    RUAN Ying; WEI BingBo

    2009-01-01

    Under the conventional solidification condition,a liquid aluminium alloy can be hardly undercooled because of oxidation.In this work,rapid solidification of an undercooled liquid Al,80.4Cu,13.6Si,6 ternary eutectic alloy was realized by the glass fluxing method combined with recycled superheating.The re-lationship between superheating and undercooling was investigated at a certain cooling rate of the alloy melt.The maximum undercooling is 147 K (0.18 TE).The undercooled ternary eutectic is composed of α(Al) solid solution,(Si) semiconductor and β(CuAl,2) intermetallic compound.In the (Al+Si+θ) ternary eutectic,(Si) faceted phase grows independently,while (Al) and θ non-faceted phases grow coopera-tively in the lamellar mode.When undercooling is small,only (Al) solid solution forms as the leading phase.Once undercooling exceeds 73 K,(Si) phase nucleates firstly and grows as the primary phase.The alloy microstructure consists of primary (Al) dendrite,(Al+9) pseudobinary eutectic and (Al+Si+θ) ternary eutectic at small undercooling,while at large undercooling primary (Si) block,(Al+θ) pseudo-binary eutectic and (Al+Si+θ) ternary eutectic coexist.As undercooling increases,the volume fraction of primary (Al) dendrite decreases and that of primary (Si) block increases.

  14. Laser ablation of Al-Ni alloys and multilayers

    Science.gov (United States)

    Roth, Johannes; Trebin, Hans-Rainer; Kiselev, Alexander; Rapp, Dennis-Michael

    2016-05-01

    Laser ablation of Al-Ni alloys and multilayers has been studied by molecular dynamics simulations. The method was combined with a two-temperature model to describe the interaction between the laser beam, the electrons, and the atoms. As a first step, electronic parameters for the alloys had to be found and the model developed originally for pure metals had to be generalized to multilayers. The modifications were verified by computing melting depths and ablation thresholds for pure Al and Ni. Here known data could be reproduced. The improved model was applied to the alloys Al_3Ni, AlNi and AlNi_3. While melting depths and ablation thresholds for AlNi behave unspectacular, sharp drops at high fluences are observed for Al_3Ni and AlNi_3. In both cases, the reason is a change in ablation mechanism from phase explosion to vaporization. Furthermore, a phase transition occurs in Al_3Ni. Finally, Al layers of various thicknesses on a Ni substrate have been simulated. Above threshold, 8 nm Al films are ablated as a whole while 24 nm Al films are only partially removed. Below threshold, alloying with a mixture gradient has been observed in the thin layer system.

  15. Spectroscopic factor strengths in $^{27}$Al(d,$^{3}$He)$^{26}$Mg and $^{27}$Al(d,$t$)$^{26}$Al reactions

    CERN Document Server

    Srivastava, P C

    2016-01-01

    In the present work we calculated spectroscopic factor strengths for recently measured experimental data for $1p$ and $1n$ pick-up reactions $^{27}$Al(d,$^{3}$He)$^{26}$Mg [Phys. Rev. C {\\bf 93}, 044601 (2016)] and $^{27}$Al( d,$t$)$^{26}$Al [Phys. Rev. C {\\bf 91}, 054611 (2015)] within the framework of the shell-model. We performed calculations with USDA and USDB effective interactions, results are in a good agreement with the experimental data.

  16. Comparison of CrAlN layers obtained with one (CrAl) or two targets (Cr and Al) by magnetron sputtering

    Energy Technology Data Exchange (ETDEWEB)

    Nouveau, C., E-mail: nouveau@cluny.ensam.fr [Laboratoire Bourguignon des Materiaux et Procedes, LaBoMaP, Centre Arts et Metiers ParisTech, Rue Porte de Paris, F-71250, Cluny (France); Tlili, B., E-mail: tlilii_brahim@yahoo.fr [UR. Mecanique Appliquee, Ingenierie et Industrialisation (M.A2I), ENIT, BP 37, Le Belvedere, 1002, Tunis (Tunisia); Aknouche, H., E-mail: h.aknouche@yahoo.fr [URMPE, F.S.I. Universite M' Hamed Bougara, 35000, Boumerdes Algeria (Algeria); Benlatreche, Y., E-mail: benlatrechey@yahoo.fr [Laboratoire de Mecanique de Lille, LML CNRS UMR 8107, Centre Arts et Metiers ParisTech, 8 Boulevard Louis XIV, F-59046, Lille cedex (France); Patel, B., E-mail: Bhavesh.PATEL-7@etudiants.ensam.eu [Laboratoire Bourguignon des Materiaux et Procedes, LaBoMaP, Centre Arts et Metiers ParisTech, Rue Porte de Paris, F-71250, Cluny (France)

    2012-01-31

    The aim of this study is to compare the properties of CrAlN coatings obtained by magnetron sputtering with one (CrAl) or two targets (Cr and Al). The influence of parameters such as the target bias voltage, the working pressure, the deposition time and the bias voltage applied on the Cr or Al targets on the properties of the layers was studied. We characterized the films by X-ray Diffraction, Scanning Electron Microscopy, coupled with Energy Dispersive Spectroscopy, nanoindentation and their residual stresses were also determined. The optimal films obtained with both methods are well crystallized, well-adherent to the substrate, and contained similar amounts of Al (20-30 at.%). The optimal coatings synthesized with one target presented properties not as good as those realized with two targets. Nevertheless, films made with one target showed a lower frictional coefficient probably due to composition control. The lack of compositional control with the use of one target limits the optimization process. With two targets, we have greater control over the film composition. This leads to higher hardness, lower stresses, and improved Young's modulus over films produced with a single CrAl target. Additionally, the morphologies are different (columnar with CrAl and dense with Cr and Al). To conclude, it seems more justified to work if possible with two independent targets. - Highlights: Black-Right-Pointing-Pointer CrAlN layers obtained with a (Cr75Al25) target or Cr and Al independent targets. Black-Right-Pointing-Pointer Lower friction coefficient and better crystallinity obtained with a sintered target. Black-Right-Pointing-Pointer Al content of layers obtained with a sintered target limited and fixed. Black-Right-Pointing-Pointer Better tribological properties of layers obtained with two targets. Black-Right-Pointing-Pointer No economical, practical and scientific interest to work with a sintered target.

  17. Screw dislocation-induced growth spirals as emissive exciton localization centers in Al-rich AlGaN/AlN quantum wells

    Energy Technology Data Exchange (ETDEWEB)

    Funato, Mitsuru, E-mail: funato@kuee.kyoto-u.ac.jp; Banal, Ryan G.; Kawakami, Yoichi [Department of Electronic Science and Engineering, Kyoto University, Kyoto 615-8510 (Japan)

    2015-11-15

    Screw dislocations in Al-rich AlGaN/AlN quantum wells cause growth spirals with an enhanced Ga incorporation, which create potential minima. Although screw dislocations and their surrounding potential minima suggest non-radiative recombination processes within growth spirals, in reality, screw dislocations are not major non-radiative sinks for carriers. Consequently, carriers localized within growth spirals recombine radiatively without being captured by non-radiative recombination centers, resulting in intense emissions from growth spirals.

  18. Mechatronics - a discipline with a future in automotive development; Die Mechatronik als Zukunftsdisziplin der Automobilentwicklung

    Energy Technology Data Exchange (ETDEWEB)

    Runge, W. [ZF Friedrichshafen AG (Germany)

    2000-12-01

    Modern motor vehicles are increasingly determined by electrical and electronic systems. Experts have estimated that, in future, 90% of all innovations in automotive engineering would not be possible without the use of electronic components and the corresponding software. But, when it comes to integrating all of these new electric components and drives, the developers come up against a natural boundary - the space available in the vehicle itself. Future developments in automotive engineering will therefore be largely determined by the spatial integration of electrical and electronic systems in the vehicle. This - besides other factors - is the main reason for the major importance of mechatronics in automotive engineering. (orig.) [German] Moderne Kraftfahrzeuge werden immer mehr von der Elektrik und Elektronik gepraegt. Nach Einschaetzung von Experten werden kuenftig 90% aller fahrzeugtechnischen Innovationen durch die Verwendung elektronischer Komponenten und entsprechender Software erst moeglich werden. Bei der Integration aller neuen elektrischen Komponenten und Antriebe stossen die Entwickler aber auf eine natuerliche Grenze - den im Automobil vorhandenen Bauraum. Die kuenftige Entwicklung im Automobil wird daher massgeblich durch die raeumliche Integration der Elektrik und Elektronik im Kfz bestimmt. Dies ist - neben anderen Faktoren - der wesentliche Treiber fuer die zunehmende Bedeutung der Mechatronik im Automobilbau. (orig.)

  19. Preparation and mechanical properties of Fe3Al/Al2O3 nano-/micro-composite

    Institute of Scientific and Technical Information of China (English)

    尹衍升; 龚红宇; 范润华; 王昕; 谭训彦

    2003-01-01

    Al2O3 matrix composites reinforced with Fe3 Al nano-particles were fabricated by hot processing at 1 450-1 600℃.The effect of Fe3Al content on the densification,mechanical properties and microstructure of the composites was investigated.The results show that some elongated Al2 O3 grains are observed.Fe3 Al particles are mainly situated at grain boundaries of the matrix while smaller particles are trapped within the alumina grains.The addition of Fe3 Al nanoparticles improves the mechanical properties of alumina.The maximum strength and toughness of the Fe3Al/Al2O3 nanocomposites are 832 Mpa and 7.96 Mpa·m1/2,respectively.

  20. Lubrication performance and mechanisms of Mg/Al-, Zn/Al-, and Zn/Mg/Al-layered double hydroxide nanoparticles as lubricant additives

    Energy Technology Data Exchange (ETDEWEB)

    Li, Shuo [School of Materials Science and Technology, China University of Geosciences (Beijing), 29 Xueyuan Road, Haidian Distract, Beijing 100083 (China); Nanoprobe Laboratory for Bio- & Nanotechnology and Biomimetics (NLBB), The Ohio State University, 201 W. 19th Avenue Columbus, OH 43210-1142 (United States); Bhushan, Bharat, E-mail: bhushan.2@osu.edu [Nanoprobe Laboratory for Bio- & Nanotechnology and Biomimetics (NLBB), The Ohio State University, 201 W. 19th Avenue Columbus, OH 43210-1142 (United States)

    2016-08-15

    Highlights: • Mg/Al-, Zn/Al- and Zn/Mg/Al-layered double hydroxide were synthesized. • Mg/Al-LDH had superior tribological performance compared to other LDHs. • The best thermal stability of Mg/Al-LDH was responsible for its friction property. - Abstract: Solid lubricant particles are commonly used as oil additives for low friction and wear. Mg/Al-, Zn/Al-, and Zn/Mg/Al-layered double hydroxides (LDH) were synthesized by coprecipitation method. The benefits of LDH nanoparticles are that they can be synthesized using chemical methods where size and shape can be controlled, and can be modified organically to allow dispersal in fluids. The LDH nanoparticles were characterized by X-ray diffraction, scanning electron microscope, thermogravimetry, and differential scanning calorimetry. A pin-on-disk friction and wear tester was used for evaluating the friction and wear properties of LDH nanoparticles as lubricant additives. LDH nanoparticles have friction-reducing and anti-wear properties compared to oil without LDHs. Mg/Al-LDH has the best lubrication, possibly due to better thermal stability in severe conditions.