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See detailCrystallization mechanism in melts of short n-alkane chains
Anwar, Muhammad UL; Turci, Francesco UL; Schilling, Tanja UL

in Journal of Chemical Physics (2013), 139(21),

We study crystallization in a model system for eicosane (C20) by means of molecular dynamics simulation and identify the microscopic mechanisms of homogeneous crystal nucleation and growth. For the ... [more ▼]

We study crystallization in a model system for eicosane (C20) by means of molecular dynamics simulation and identify the microscopic mechanisms of homogeneous crystal nucleation and growth. For the nucleation process, we observe that chains first align and then straighten. Then the local density increases and finally the monomer units become ordered positionally. The subsequent crystal growth process is characterized by a sliding-in motion of the chains. Chains preferably attach to the crystalline cluster with one end and then move along the stems of already crystallized chains towards their final position. This process is cooperative, i.e., neighboring chains tend to get attached in clusters rather than independently. [less ▲]

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See detailAdjustment costs in a variant of Uzawa's steady-state growth theorem
Irmen, Andreas UL

in Economics Bulletin (2013)

Uzawa's theorem (Uzawa (1961)) is extended to allow for adjustment costs in the process of capital accumulation. A new steady-state growth theorem with adjustment costs establishes that capital-augmenting ... [more ▼]

Uzawa's theorem (Uzawa (1961)) is extended to allow for adjustment costs in the process of capital accumulation. A new steady-state growth theorem with adjustment costs establishes that capital-augmenting technical change may arise in steady state. This is in sharp contrast to Uzawa's original finding. In a growing economy this possibility arises since diminishing returns in the production of capital cause a gap between the growth of gross capital investments and the growth of capital. In steady state, capital-augmenting technical change has the role to fill this gap. The discussion of the new theorem characterizes the conditions under which a steady-state path with capital-augmenting technical change exists. [less ▲]

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See detailEurope's better self? Literary reflections on national identity and political neutrality in Switzerland
Wiegmann, Eva UL

Scientific Conference (2013, December 03)

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See detailInformation Dependencies in MCS: Conviviality-Based Model and Metrics
Caire, Patrice UL; Bikakis, Antonis; Le Traon, Yves UL

in 16th INTERNATIONAL CONFERENCE ON PRINCIPLES AND PRACTICE OF MULTI-AGENT SYSTEMS (PRIMA 2013) (2013, December 01)

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See detailGenomic Sequence Diversity and Population Structure of Saccharomyces cerevisiae Assessed by RAD-seq
Cromie, Gareth A.; Hyma, Katie E.; Ludlow, Catherine L. et al

in Genes, Genomes and Genomics (2013), 3(12), 2163-2171

The budding yeast Saccharomyces cerevisiae is important for human food production and as a model organism for biological research. The genetic diversity contained in the global population of yeast strains ... [more ▼]

The budding yeast Saccharomyces cerevisiae is important for human food production and as a model organism for biological research. The genetic diversity contained in the global population of yeast strains represents a valuable resource for a number of fields, including genetics, bioengineering, and studies of evolution and population structure. Here, we apply a multiplexed, reduced genome sequencing strategy (known as RAD-seq) to genotype a large collection of S. cerevisiae strains, isolated from a wide range of geographical locations and environmental niches. The method permits the sequencing of the same 1% of all genomes, producing a multiple sequence alignment of 116,880 bases across 262 strains. We find diversity among these strains is principally organized by geography, with European, North American, Asian and African/S. E. Asian populations defining the major axes of genetic variation. At a finer scale, small groups of strains from cacao, olives and sake are defined by unique variants not present in other strains. One population, containing strains from a variety of fermentations, exhibits high levels of heterozygosity and mixtures of alleles from European and Asian populations, indicating an admixed origin for this group. In the context of this global diversity, we demonstrate that a collection of seven strains commonly used in the laboratory encompasses only one quarter of the genetic diversity present in the full collection of strains, underscoring the relatively limited genetic diversity captured by the current set of lab strains. We propose a model of geographic differentiation followed by human-associated admixture, primarily between European and Asian populations and more recently between European and North American populations. The large collection of genotyped yeast strains characterized here will provide a useful resource for the broad community of yeast researchers. [less ▲]

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See detailLe plein office du juge et le rôle des parties
Menetrey, Séverine UL

in JurisNews – Arbitrage et procédure civile (2013)

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See detail56. Aktualisierungslieferung - §§ 14, 43, 52b, 62, 64 RStV
Cole, Mark UL; Hartstein; Ring et al

Book published by Jehle-Rehm (2013)

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See detailTheorie und Genealogie des Techno-Imaginären : Social Media zwischen ›Digital Nation‹ und kosmopolitischem Pluralismus
Doll, Martin UL

in Doll, Martin; Kohns, Oliver (Eds.) Die imaginäre Dimension der Politik (2013)

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See detailFaster Print on Demand for Prêt à Voter
Culnane, Chris; Heather, James; Joaquim, Rui UL et al

in Journal of Election Technology and Systems (2013), 2(1),

Printing Prêt à Voter ballots on demand is desirable both for convenience and security. It allows a polling station to serve numerous different ballots, and it avoids many problems associated with the ... [more ▼]

Printing Prêt à Voter ballots on demand is desirable both for convenience and security. It allows a polling station to serve numerous different ballots, and it avoids many problems associated with the custody of the printouts. This paper describes a new proposal for printing Prêt à Voter ballots on demand. The emphasis is on computational efficiency suitable for real elections, and on very general ballot types. [less ▲]

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See detailQuantification of Financial News for Economic Surveys
Minev, Mihail UL

in International Conference on Data Mining Workshops (2013, December)

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See detailSingular spectrum analysis for modeling seasonal signals from GPS time series
Chen, Qiang; van Dam, Tonie UL; Sneeuw, Nico et al

in Journal of Geodynamics (2013), 72

Seasonal signals in GPS time series are of great importance for understanding the evolution of regional mass fluctuations, i.e., ice, hydrology, and ocean mass. Conventionally these signals quasi-annual ... [more ▼]

Seasonal signals in GPS time series are of great importance for understanding the evolution of regional mass fluctuations, i.e., ice, hydrology, and ocean mass. Conventionally these signals quasi-annual and semi-annual signals are modeled by least-squares fitting harmonic terms with a constant amplitude and phase. In reality, however, such seasonal signals are modulated, i.e., they will have a time-variable amplitude and phase. Recently, Davis et al.(2012) proposed a Kalman filter based approach to capture the stochastic seasonal behavior of geodetic time series. Singular Spectrum Analysis (SSA) is a non-parametric method, which uses time domain data to extract information from short and noisy time series without a priori knowledge of the dynamics affecting the time series. A prominent benefit is that trends obtained in this way are not necessarily linear. Further, true oscillations can be amplitude and phase modulated. In this work, we will assess the value of SSA for extracting time-variable seasonal signals from GPS time series. We compare our SSA-based results to those obtained using 1) least-squares analysis and 2) Kalman filtering. Our results demonstrate that SSA is a viable and complementary tool for extracting modulated oscillations from GPS time series. [less ▲]

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See detailSeeing oneself through the eyes of others
Hofmann, Frank UL; Pöhlmann, Ferdinand

in Philosophia Naturalis (2013), 50

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See detailVeins filled with the dilluted sap of rationality. A critical reply to Rens Bod
Fickers, Andreas UL

in BMGN - Low Countries Historical Review (2013), 128(4), 155-163

This article argues – in contradiction to the thesis developed by Rens Bod – that the hermeneutic tradition of humanities is not obsolete, especially when trying to understand the opportunities and ... [more ▼]

This article argues – in contradiction to the thesis developed by Rens Bod – that the hermeneutic tradition of humanities is not obsolete, especially when trying to understand the opportunities and challenges of using digital technologies for future research. The practice of digital history will have to be based on the critical analysis of the creation, enrichment, editing and retrieval of digital data as much as on the application of classical source criticism and historical contextualisation. If 'content' or rather 'data' is king in digital humanities, as imagined by Bod, context is its crown – at least for digital historians. [less ▲]

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See detailInégalités de formation lors de l’accès à l’enseignement supérieur selon le sexe et le contexte migratoire: résultats de l’analyse des situations suisse, allemande et française
Griga, Dorit; Hadjar, Andreas UL

in Schweizerische Zeitschrift fur Bildungswissenschaften = Rivista Svizzera di Scienze dell'Educazione = Revue Suisse des Sciences de l'Education (2013), 35(3), 493-513

The paper deals with the transition to Higher Education focusing on educational inequalities at the intersection of gender and migrant background. At the core of the analyses, theorized referring to ... [more ▼]

The paper deals with the transition to Higher Education focusing on educational inequalities at the intersection of gender and migrant background. At the core of the analyses, theorized referring to decision theory, is a comparison of Switzerland (TREE), Germany (HIS-Studienberechtigte 2002) and France (Panel d’élèves du second degré 1995). Results indicate increased transition rates to Higher Education for second-generation males from some socially disadvantaged migrant groups for Switzerland and Germany, if controlled for social origin. Evidence confirming a female disadvantage for second generation females originating from countries characterised by a rather patriarchal culture were not found in any of the countries under consideration. [less ▲]

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See detailOn the capability to derive mass estimates from high-low satellite-to-satellite tracking data
Weigelt, Matthias UL; van Dam, Tonie UL; Tourian, M. J. et al

Poster (2013, December)

Recently it has been shown that it is possible to derive time-variable gravity signals from high-low satellite-to-satellite tracking (hl-SST) missions (Weigelt et al. 2013, JGR:Solid Earth, doi:10.1002 ... [more ▼]

Recently it has been shown that it is possible to derive time-variable gravity signals from high-low satellite-to-satellite tracking (hl-SST) missions (Weigelt et al. 2013, JGR:Solid Earth, doi:10.1002/jgrb.50283). Based on the GPS information only, we will present results derived from the dedicated gravity field missions CHAMP, GRACE and GOCE which allow us to determine mass estimates for various applications. Hydrologically induced mass changes on land cause the strongest mass variations in the gravity field and can be easily identified in the hl-SST data, especially in areas with strong signals such as the Amazon basin. Ice melt in Greenland can be derived from the data and mass estimates compare well to corresponding GRACE estimates. Also, loading time series based on these gravity field solutions agree well with GPS observations for various stations around the globe. We also discuss the limitations of the data, e.g. in detecting signals related to glacial isostatic adjustment or earthquake-induced gravity field changes. Overall, we will demonstrate that the quality of the GPS data is sufficient nowadays and with a proper processing strategy it is possible to derive reasonable mass estimates. As such, this type of observations may allow to bridge a possible gap between GRACE and its successor GRACE Follow-On scheduled for launch in 2017. [less ▲]

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