1,388 research outputs found
T-ray spectroscopy of biomolecules: from chemical recognition toward biochip analysis-horizons and hurdles
No full textBernd M. Fischer, Hanspeter Helm and Peter Uhd Jepse
Microarray Biochips - Thousands of Reactions on a Small Chip (MOBA)
No full textWolfgang Mönch, Johannes Donauer, Bernd M. Fischer, Rüdiger Frank, Günter Gauglitz, Carsten Glasenapp, Hanspeter Helm, Paul Hing, Matthias Hoffmann, Peter Uhd Jepsen, Thomas Kleine-Ostmann, Martin Koch, Holger Krause, Nicolae Leopold, Tina Mutschler, Frank Rutz, Titus Sparna, Hans Zapp
Languages and international virtual exchange
No full textIntroduction to a special edition of the journal. The article briefly reviews new developments in virtual exchange on a policy level, and then provides a short summary of each of the articles in this special edition. The author of this introduction was co-editor of this special edition of the journal
Cwbr Author Interview: This Vast Southern Empire: Slaveholders At The Helm Of American Foreign Policy
No full textInterview with Matthew Karp, author of This Vast Southern Empire: Slaveholders at the Helm of American Foreign Policy Interviewed by Tom Barber Civil War Book Review (CWBR): Today the Civil War Book Review is happy to speak with Matthew Karp, Assistant Professor of History at Princeton Uni...
A Dialogic Model for Telecollaboration
No full textIn language learning contexts, telecollaboration is understood to be internet-based intercultural exchange between people of different cultural/national backgrounds set up in an institutional context with the aim of developing both language skills and intercultural communicative competence. Generally students interact with one another on 'safe' topics and subsequently reflect on and discuss their interactions with teachers and peers. This paper presents a dialogic model of telecollaboration which breaks from this tradition as it entails interaction on topics which are seen as divisive through dialogue in groups led by trained facilitators, the Soliya Connect Program (SCP). The differences between this model of telecollaboration and traditional models are illustrated, and then the author presents the results of a survey study which looks at participants' evaluation of this program, what they perceive to be the role of the facilitators and their personal learning outcomes.Nell'apprendimento linguistico, 'telecollaboration' significa scambio interculturale online tra persone di diverse culture, organizzato a livello istituzionale, con l'obiettivo di sviluppare sia competenze linguistiche che interculturali attraverso attività strutturate. Solitamente, partecipanti discutono su argomenti 'sicuri' e poi riflettono sulle interazioni in classe con il docente. Questo articolo presenta un nuovo modello di telecollaboration, Soliya Connect Program, che si differenzia da questa tradizione in quanto partecipanti discutono argomenti contenziosi sotto la guida di facilitatori esperti. Vengono illustrate le differenze tra questi diversi modelli di telecollaboration e in seguito sono presentati i risultati di uno studio che indaga la valutazione di questo progetto da parte dei partecipanti, il ruolo dei facilitatori e i risultati di apprendimento percepiti dai partecipanti.En contextos de aprendizaje de idiomas, telecolaboración se entiende como el intercambio intercultural, facilitado vía Internet, entre las personas de diferentes orígenes culturales / nacionales. La interacción es construida en un contexto institucional con el objetivo de desarrollar tanto las habilidades lingüísticas como las competencias comunicativas e interculturales. En general, los estudiantes interactúan entre sí sobre temas "seguros" y, posteriormente, reflexionan y discuten sobre sus interacciones con los profesores y compañeros. En este trabajo se presenta un modelo dialógico de telecolaboración que rompe con esta tradición, ya que implica la interacción sobre temas que se consideran de división o conflictivos, a través del diálogo en grupos dirigidos por mediadores capacitados (dentro del Programa Connect Soliya). Se ilustran las diferencias entre este modelo de telecolaboración y los modelos tradicionales. La autora presenta los resultados de un estudio de investigación que analiza la evaluación de los participantes de este programa, como perciben el papel de los mediadores y los resultados personales de aprendizaje
Technology and Language Learning. What the Learners Say
No full textThis paper, based on a plenary talk given at UNAM in Mexico in 2006 gives a brief overview of some recent research reports and surveys on technology and learning, particularly learner attitudes to ICT, including a survey carried out by the author at the University of Padova. It looks at some of the possible implications of research results for the use of technology in language learning, with particular reference to the self access context. Finally, the paper explores some ways in which self access centres can use technology to take into account current social-constructivist approaches to language learning, to foster learner autonomy and meet the needs of students who have to become effective language users in the information and communication society we now live in
New Technologies: the students' perspective
No full textThis paper presents the results of a longitudinal study regarding the experience, use and attitudes of undergraduate students of English language towards technology in language learning. After an explanation of the rationale underlying the project the author carries out a literature review,a description of the survey population, the teaching and learning context and the research tool and finally a description of the results obtained and a discussion of these
Biosensing with T-ray spectroscopy
No full textCopyright © 2007 SPIE - The International Society for Optical Engineering Copyright 2007 Society of Photo-Optical Instrumentation Engineers. This paper was published in Biophotonics 2007: Optics in Life Science, edited by Jürgen Popp, Gert von Bally, Proc. of SPIE-OSA Biomedical Optics, SPIE Vol. 6633, 66331D and is made available as an electronic reprint with permission of SPIE. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.In the recent years, it has been shown that terahertz (or T-ray) spectroscopy is a versatile tool for biosensing and safety applications. This is due to the fact that the THz-spectra of many biomolecules show very characteristic, distinct spectroscopic features. Furthermore, most non-metallic packaging materials are nearly transparent in this frequency range (0.1-6 THz, 3 cm-1-200 cm-1), so that it is possible to non-invasively identify even sealed substances like pharmaceuticals, illicit drugs or explosives by their spectroscopic signatures. This opens a significant potential for a wide range of applications from quality control of pharmaceutical substances via safety applications through to biomedical applications. The individual spectroscopic features below approximately 5 THz that spurred the increased world wide interest in T-ray spectroscopy are mainly due to intermolecular rather than intramolecular vibrations in the polycrystalline samples. The spectra of more complex biomolecules, like proteins and nucleotides, typically show less or even no sharp features, due to the lack of long-range intermolecular order. Furthermore, due to the typically significantly smaller sample amount, the signal to noise ratio is strongly increased. Water shows a strong absorption in this frequency range, which all together makes real biomedical applications of T-ray spectroscopy rather difficult. Yet, by combining a careful sample preparation, novel experimental techniques and an advanced signal processing of the experimental data we can still clearly distinguish between even complex biomolecules and therefore demonstrate the potential the technique holds for biomedical applications. © 2007 SPIE-OSA.Bernd M. Fischer, Hanspeter Helm and Derek Abbot
HELM - new method for the power flow calculation in electric power grids
No full textMetoda HELM (Holomorphic Embedding Load Fload Method) jest całkowicie nową metodą rozwiązywania równań opisujących stany ustalone systemów elektroenergetycznych. Działanie metody oparte jest o wykorzystanie technik analizy zespolonej. Jednak najważniejszą jej cechą jest to, że jeżeli rozwiązanie istnieje, wówczas odpowiada rzeczywistemu stanowi pracy systemu. Natomiast gdy rozwiązanie nie istnieje, wówczas jednoznacznie sygnalizuje że wystąpi lawina napięcia (blackout). Artykuł jest pierwszą prezentacją metody HELM. Pokazuje jej główne założenia i sposób odwzorowania podstawowych elementów modelu systemu elektroenergetycznego. Dokonuje również porównania obliczeń z wykorzystaniem metody HELM z klasycznymi metodami iteracyjnymi.HELM (Holomorphic Embedding Load Flow Method) is a novel method for calculation the power flow equations of power systems. It based on the techniques of Complex Analysis. HELM is non-iterative and deterministic method, yielding the correct solution when it exists and, conversely, unequivocally signaling voltage collapse when it does not. The article is the first presentation of the HELM method. It shows its main assumptions and the way of creation the basic elements of the power system model. Author compares the calculations using the HELM method with classic iterative methods
Converse theorems and the local Langlands correspondence in families
No full textWe prove a descent criterion for certain families of smooth representations of GLn(F) (F a p-adic field) in terms of the γ-factors of pairs constructed in Moss (Int Math Res Not 2016(16):4903–4936, 2016). We then use this descent criterion, together with a theory of γ-factors for families of representations of the Weil group WF (Helm and Moss in Deligne–Langlands gamma factors in families, arXiv:1510.08743v3, 2015), to prove a series of conjectures, due to the first author, that give a complete description of the center of the category of smooth W(k)[GLn(F)]-modules (the so-called “integral Bernstein center”) in terms of Galois theory and the local Langlands correspondence. An immediate consequence is the conjectural “local Langlands correspondence in families” of Emerton and Helm (Ann Sci Éc Norm Supér (4) 47(4):655–722, 2014)
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