Protocluster Discovery in Tomographic Lyα\alpha Forest Flux Maps

We present a new method of finding protoclusters using tomographic maps of Ly$\alpha$ Forest flux. We review our method of creating tomographic flux maps and discuss our new high performance implementation, which makes large reconstructions computationally feasible. Using a large N-body simulation, we illustrate how protoclusters create large-scale flux decrements, roughly 10 $h^{-1}$Mpc across, and how we can use this signal to find them in flux maps. We test the performance of our protocluster finding method by running it on the ideal, noiseless map and tomographic reconstructions from mock surveys, and comparing to the halo catalog. Using the noiseless map, we find protocluster candidates with about 90% purity, and recover about 75% of the protoclusters that form massive clusters ($> 3 \times 10^{14} \, h^{-1} M_{\odot}$). We construct mock surveys similar to the ongoing COSMOS Lyman-Alpha Mapping And Tomography Observations (CLAMATO) survey. While the existing data has an average sightline separation of 2.3 $h^{-1}$Mpc, we test separations of 2 - 6 $h^{-1}$Mpc to see what can be tolerated for our application. Using reconstructed maps from small separation mock surveys, the protocluster candidate purity and completeness are very close what was found in the noiseless case. As the sightline separation increases, the purity and completeness decrease, although they remain much higher than we initially expected. We extended our test cases to mock surveys with an average separation of 15 $h^{-1}$Mpc, meant to reproduce high source density areas of the BOSS survey. We find that even with such a large sightline separation, the method can still be used to find some of the largest protoclusters.Comment: 18 pages, 12 figure

Beratung mit Wirkung: Die Effekte der Berufsberatung von BerufsInfoZentren (BIZ) des AMS am Beispiel von Burgenland und Tirol

[Einleitung ...] Gegenstand der Untersuchung sind in der vorliegenden Studie die BerufsInfoZentren (BIZ) des AMS Tirol und des AMS Burgenland. Deren Angebot kann von Personen vor der Berufs-/Ausbildungswahl, Personen in Beschäftigung, Arbeitssuchenden und Personen in Ausbildung kostenfrei genutzt werden, wobei die Leistung einen ca. 45-minütigen Termin und maximal einen Folgetermin umfasst. Ziel ist es, "einen Beitrag zur Problemklärung und Entscheidungsfindung bei berufs- und bildungsrelevanten Fragen zu leisten". Die BIZ-Leistungen sind in Bezug auf Qualitätsstandards für anbieterneutrale Information, Beratung und Orientierung für Bildung und Beruf IBOBB-zertifiziert, sodass mit der Erfüllung von bestimmten Qualitätsstandards eine wichtige Voraussetzung für eine gute Berufsberatung gegeben ist. Die Frage danach, welche Wirkungen die BIZ-Beratung tatsächlich hat und ob die Zielsetzungen erreicht werden, wurde bislang nicht systematisch untersucht und stand daher im Mittelpunkt der vorliegenden empirischen Studie. Die Beantwortung dieser Forschungsfrage ist zudem relevant, da die BIZ-Beratung ein wichtiges Element zur Umsetzung der österreichischen Lifelong-Guidance-Strategie darstellt. Neben diesen inhaltlichen Zielsetzungen, werden im Rahmen der Studie auch die methodischen Herangehensweisen der Wirkungsmessung kritisch auf ihre Eignung hin bewertet

Does Supervision in Multiday Travel Surveys Lead to Higher Quality? A Comparison of Two Independent Surveys

The aim of this paper is to analyze whether the level of supervision influences quality of response and results of multi-day surveys. For that reason, we compare a multi-day survey (seven consecutive days) with children and high level of supervision in Austria (UTS) with data of the same age group out of the Mobility Survey in the Greater Stuttgart Region (MOSt). The results show that supervision during the survey process has nearly no influence on fatigue effects. Nevertheless, the quality of answers in supervised surveys is be better in terms of reporting intermodality or trip stages

Does supervision in multi-day travel surveys lead to higher quality? A comparison of two independent surveys

The aim of this paper is to analyze whether the level of supervision influences quality of response and results of multi-day surveys. For that reason, we compare a multi-day survey (seven consecutive days) with children and high level of supervision in Austria (UTS) with data of the same age group out of the Mobility Survey in the Greater Stuttgart Region (MOSt). The results show that supervision during the survey process has nearly no influence on fatigue effects. Nevertheless, the quality of answers in supervised surveys is be better in terms of reporting intermodality or trip stages

Culture, Utility or Social Systems?:Explaining the Cross-National Ties of Emigrants from Borsa, Romania

Emigrants from Borşa, Romania, display two quite distinct patterns of ties with their community of origin: migration to Italy is discernibly transnational, with a strong reliance on migrant networks; while migration to the UK is more individualistic, with emigrants shunning interaction with compatriots and retaining only weak ties to Borşa. We argue that prevalent theories of cross-national ties fail adequately to explain this divergence. Instead, we draw on systems theory to explain the discrepancy in terms of divergent conditions for societal inclusion. In Italy, incorporation into parallel, unofficial structures of work, welfare and accommodation encouraged a reliance on cultural criteria for maintaining social ties. In the UK, migrants were obliged to integrate into state-sponsored systems, encouraging the relinquishing of ethnic ties in favour of more strategic networking to facilitate societal inclusion

VennMaker para historiadores : fuentes, redes sociales y programas informáticos

Este artículo explora la aplicabilidad del programa informático VennMaker para la investigación histórica. El artículo se apoya en dos casos de estudio de investigaciones históricas actuales orientadas a estudiar las redes y que cubren diferentes periodos de tiempo y distintas fuentes. La mayor ventaja de VennMaker es que invierte el proceso de recolección de datos. Mientras que los programas tradicionales utilizan datos pre-codificados para producir el mapa de una red, VennMaker genera los datos mientras que el investigador dibuja los nodos y crea el mapa de una red. Las bases de datos de matrices prefabricadas ya no son necesarias; por lo tanto, el programa puede ser utilizado fácilmente por historiadores que no se han formado en las ciencias sociales. Los dos casos incluyen el análisis de una estructura familiar en la historia antigua y las redes ego-centradas de judíos que se escondían durante el Nacional-Socialismo. Artumentamos que una representación visual de las relaciones sociales ayuda a revelar modelos invisibles y caracerísticas de las redes que ofrecen a los investigadores nuevas perspectivas sobre sus temas de investigación. El programa ofrece una variedad de herramientas para representar las relaciones sociales y su desarrollo a lo largo del tiempo y del espacio.This paper explores the applicability of the software VennMaker to historical research. The paper draws on two case studies from current network-oriented historical research projects, covering different time periods and sources. VennMaker's biggest advantage is that it inverts the process of data collection. While traditional software uses pre-coded data to produce a network map, VennMaker generates data while the researcher draws nodes and creates a network map. Prefabricated data matrices are no longer necessary; therefore, the software can easily be used by historians lacking training in the social sciences. Our two cases include an analysis of a family structure in ancient history and ego-networks of Jews in hiding during National Socialism. We argue that a visual representation of social relations helps to reveal unseen patterns and characteristics of networks therefore offering scholars new perspectives on their research subjects. The software offers a variety of tools to represent social relations and their development over time and space

Meet the challenge in service identification: A ratio-based approach

Business processes in todays German universities possess high reorganization potential through Information Technology (IT). In particular service-oriented architectures (SOA) gain importance and respective development projects are started, distributed with respect to personnel, place and can comprise diverse organizations. We assume that a detailed analysis of company’s business process structure is a prerequisite to define useful services. In the SOA domain, the process landscape is most likely modelled in distributed modelling projects. This leads to variations since distributed models e. g. do not necessarly share the same level of detail. Thus, the model integration is a necessary step that has to be done before core functions can be identified within the documented processes for a planned implementation of services for a SOA. As the process models are documented electronically using a modeling tool, the process of identifying the service candidates can be supported by an automatic analysis of the process models. We introduce an approach to support the identification of services by using ratios generated out of the business process models and demonstrate its applicability within the research program