Implementing antisemitism studies in German teacher education

The integration of antisemitism as a topic for teacher education is urgent, especially in the social sciences Education regarding contemporary antisemitism must be combined with an analysis of racism and historical-political perspectives on the Shoah to succeed in post-migrant society Slight changes of the curricula are a reliable base for further development A nexus between schools, universities and actors of civil society is needed in order to target antisemitism International summer schools, German-Israeli study groups or collaborative workshops are exemplary pilot projects in order to establish competence regarding education critical of antisemitism   Purpose: Following the current rise of antisemitism globally and in Germany, this paper examines the current situation regarding Antisemitism in teacher education. The paper aims to make a contribution for the demand of an implementation of education critical of Antisemitism in teacher education. Approach: Combining experience from university teacher training and the field of extracurricular political education we appoint perspectives for a sustainable implementation of education critical of antisemitism in teacher training via best practice examples. We evaluate the potentials of field trips, international study groups and networks between university and agents located in civil society. Findings: The revised curricula for Social Sciences in the state of North-Rhine-Westphalia (and formerly Berlin) name current antisemitism for the first time, indicating an urgent need for professionalization in Social Science teacher education where the facets of antisemitism only play a minor role. Hence, expertise and existing resource must be stabilized, a structural implementation and funding is needed in order to target the challenging topic of antisemitism. Research limitations/implications: This paper functions as a preliminary research in order to examine the given shape of Social Science teacher education and Antisemitism in Germany. A comprehensive, structured analyses of all teacher training facilities as well as extracurricular agents working in the field of education critical of antisemitism could be useful in order to pool expertise. Nonetheless this paper encourages local collaborations between university and civiliety actors

Foundations of SPARQL Query Optimization

The SPARQL query language is a recent W3C standard for processing RDF data, a format that has been developed to encode information in a machine-readable way. We investigate the foundations of SPARQL query optimization and (a) provide novel complexity results for the SPARQL evaluation problem, showing that the main source of complexity is operator OPTIONAL alone; (b) propose a comprehensive set of algebraic query rewriting rules; (c) present a framework for constraint-based SPARQL optimization based upon the well-known chase procedure for Conjunctive Query minimization. In this line, we develop two novel termination conditions for the chase. They subsume the strongest conditions known so far and do not increase the complexity of the recognition problem, thus making a larger class of both Conjunctive and SPARQL queries amenable to constraint-based optimization. Our results are of immediate practical interest and might empower any SPARQL query optimizer

On Chase Termination Beyond Stratification

We study the termination problem of the chase algorithm, a central tool in various database problems such as the constraint implication problem, Conjunctive Query optimization, rewriting queries using views, data exchange, and data integration. The basic idea of the chase is, given a database instance and a set of constraints as input, to fix constraint violations in the database instance. It is well-known that, for an arbitrary set of constraints, the chase does not necessarily terminate (in general, it is even undecidable if it does or not). Addressing this issue, we review the limitations of existing sufficient termination conditions for the chase and develop new techniques that allow us to establish weaker sufficient conditions. In particular, we introduce two novel termination conditions called safety and inductive restriction, and use them to define the so-called T-hierarchy of termination conditions. We then study the interrelations of our termination conditions with previous conditions and the complexity of checking our conditions. This analysis leads to an algorithm that checks membership in a level of the T-hierarchy and accounts for the complexity of termination conditions. As another contribution, we study the problem of data-dependent chase termination and present sufficient termination conditions w.r.t. fixed instances. They might guarantee termination although the chase does not terminate in the general case. As an application of our techniques beyond those already mentioned, we transfer our results into the field of query answering over knowledge bases where the chase on the underlying database may not terminate, making existing algorithms applicable to broader classes of constraints.Comment: Technical Report of VLDB 2009 conference versio

Электромеханический исполнительный орган на базе бесконтактного электродвигателя постоянного тока с печатной обмоткой на статоре для малого космического аппарата

Создание нового электромеханического исполнительного органа на базе управляемого по скорости двигателя-маховика для системы ориентации космического аппарата с улучшенными массогабаритными характеристиками позволит экономить потребителям деньги при запуске космических аппаратов. Требование минимальной массы является одним из главных, предъявляемых к электромеханическим исполнительным органам. Целью исследования является расчет параметров и разработка конструкции электромеханического исполнительного органа на базе бесконтактного двигателя постоянного тока с улучшенными массогабаритными характеристиками. Это достигается за счет применения плоского статора, выполненного в виде печатного монтажа, при длине статора цилиндрической формы десятки миллиметров сокращаются до 1,5-2,0 мм, что влечет уменьшение размеров силовой части корпуса исполнительного органа, а соответственно, и массы всего двигателя-маховика. Результатом выполненной работы является разработанная конструкция двигателя-маховика на базе бесконтактного двигателя постоянного тока с печатной обмоткой на дисковом статоре

Implications of atmospheric conditions for analysis of surface temperature variability derived from landscape-scale thermography

Thermal infrared (TIR) cameras perfectly bridge the gap between (i) on-site measurements of land surface temperature (LST) providing high temporal resolution at the cost of low spatial coverage and (ii) remotely sensed data from satellites that provide high spatial coverage at relatively low spatio-temporal resolution. While LST data from satellite (LSTsat) and airborne platforms are routinely corrected for atmospheric effects, such corrections are barely applied for LST from ground-based TIR imagery (using TIR cameras; LSTcam). We show the consequences of neglecting atmospheric effects on LSTcamof different vegetated surfaces at landscape scale. We compare LST measured from different platforms, focusing on the comparison of LST data from on-site radiometry (LSTosr) and LSTcamusing a commercially available TIR camera in the region of Bozen/Bolzano (Italy). Given a digital elevation model and measured vertical air temperature profiles, we developed a multiple linear regression model to correct LSTcamdata for atmospheric influences. We could show the distinct effect of atmospheric conditions and related radiative processes along the measurement path on LSTcam, proving the necessity to correct LSTcamdata on landscape scale, despite their relatively low measurement distances compared to remotely sensed data. Corrected LSTcamdata revealed the dampening effect of the atmosphere, especially at high temperature differences between the atmosphere and the vegetated surface. Not correcting for these effects leads to erroneous LST estimates, in particular to an underestimation of the heterogeneity in LST, both in time and space. In the most pronounced case, we found a temperature range extension of almost 10 K

Käsikirjaline tekst:Gedanken von der patriotischen Liebe des Vaterlandes

http://tartu.ester.ee/record=b1862717~S1*es