TY - RPRT A1 - Vomhoff, Viktoria A1 - Geißler, Stefan A1 - Hoßfeld, Tobias T1 - Identification of Signaling Patterns in Mobile IoT Signaling Traffic T2 - Würzburg Workshop on Next-Generation Communication Networks (WueWoWas'22) N2 - We attempt to identify sequences of signaling dialogs, to strengthen our understanding of the signaling behavior of IoT devices by examining a dataset containing over 270.000 distinct IoT devices whose signaling traffic has been observed over a 31-day period in a 2G network [4]. We propose a set of rules that allows the assembly of signaling dialogs into so-called sessions in order to identify common patterns and lay the foundation for future research in the areas of traffic modeling and anomaly detection. KW - Datennetz KW - IoT Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-280819 ER - TY - RPRT A1 - Stepanenko, Oleg T1 - Arbeitsmarktintegration von Geflüchteten in Deutschland – Eine quantitative Analyse des Einflusses institutioneller Maßnahmen auf die Aufnahme einer Erwerbstätigkeit T1 - Labor Market Integration of Refugees in Germany – A Quantitative Analysis of the Influence of Institutional Measures on the Admission to Employment N2 - Die vorliegende Arbeit gibt einen Überblick über die bisher noch kaum evaluierte Wirkung arbeitsmarktzentrierter Integrationsmaßnahmen auf die Arbeitsmarkintegration von Geflüchteten in Deutschland. Dazu wird, mit theoretischer Fundierung durch neoklassische (Humankapital- und Signaling-Theorie) sowie institutionelle (Akteurzentrierter Institutionalismus) Ansätze, eine Sekundärdatenanalyse auf Basis der ersten drei Befragungswellen der IAB-BAMF-SOEP-Befragung von Geflüchteten durchgeführt. Methodische Grundlage der Untersuchung stellt eine Fixed-Effects-Logit-Regression dar, mit welcher durch die Kontrolle unbeobachteter Heterogenität präzise Within-Schätzungen kausaler Zusammenhänge ermöglicht werden. Die Arbeit zeigt, dass sowohl die Wahrnehmung des arbeitsmarktzentrierten Beratungsangebots (Arbeitsmarktberatung der BA) als auch die Teilnahme an dem berufsbezogenen Sprachförderkurs (ESF-BAMF-Kurs) eine kausal positive Wirkung auf die Arbeitsmarktintegration aufweist. Ebenso geht aus den Analysen hervor, dass es die Wirkungsevaluation praxisorientierter Integrationsmaßnahmen (PerF, PerjuF, PerF-W und KompAS) aufgrund einer bis dato unzureichenden Datenlage zu vertagen gilt. Dennoch konnten somit in der Bundesrepublik Deutschland zwei hochwirksame arbeitsmarktzentrierte Maßnahmen identifiziert werden, mit welchen den Geflüchteten eine solide Integrationsbasis für den Arbeitsmarkt und damit auch für die Aufnahmegesellschaft bereitgestellt wird. Ein verstärkter Einsatz der Maß-nahmen sowie eine gezielte Förderung erscheinen insbesondere im Hinblick auf die mannigfaltigen Vorteile gelungener Integration anstrebenswert. N2 - This paper provides an overview of the effects of labor market-centered integration measures on the labor market integration of refugees in Germany, which have hardly been evaluated so far. For this purpose, a secondary data analysis based on the first three waves of the IAB-BAMF-SOEP survey of refugees is conducted, with theoretical foundations in neoclassical (human capital theory and signaling theory) and institutional (actor-centered institutionalism) approaches. The methodological basis of the study is a fixed-effects logit regression, which ensures precise within-estimates of causal relationships by controlling for unobserved heterogeneity. The work shows that both the perception of the labor market-centered counseling offer (labor market counseling of the BA) and the participation in the job-related language support course (ESF-BAMF course) have a causally positive effect on labor market integration. The analyses also show that the impact evaluation of practice-oriented integration measures (PerF, PerjuF, PerF-W and KompAS) should be postponed due to insufficient data. Despite this and overall, two highly effective labor market-centered measures were identified in the Federal Republic of Germany, which provide refugees with a solid basis for integration into the labor market and thus also into the host society. Increased use of these measures and targeted support would appear to be worth striving for, especially in view of the many advantages of successful integration. T3 - Würzburger Arbeitspapiere zur Politikwissenschaft und Soziologie (WAPS) - 13 KW - Migration KW - Berufliche Integration KW - Migrationssoziologie KW - Logit-Modell KW - Arbeitsmarktforschung KW - Integrationsmaßnahme KW - Arbeitsmarktintegration KW - Geflüchtete KW - IAB-BAMF-SOEP KW - Fixed-Effects-Logit Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-255355 ER - TY - RPRT A1 - Sertbas Bülbül, Nurefsan A1 - Ergenc, Doganalp A1 - Fischer, Mathias T1 - Evaluating Dynamic Path Reconfiguration for Time Sensitive Networks T2 - Würzburg Workshop on Next-Generation Communication Networks (WueWoWas'22) N2 - In time-sensitive networks (TSN) based on 802.1Qbv, i.e., the time-aware Shaper (TAS) protocol, precise transmission schedules and, paths are used to ensure end-to-end deterministic communication. Such resource reservations for data flows are usually established at the startup time of an application and remain untouched until the flow ends. There is no way to migrate existing flows easily to alternative paths without inducing additional delay or wasting resources. Therefore, some of the new flows cannot be embedded due to capacity limitations on certain links which leads to sub-optimal flow assignment. As future networks will need to support a large number of lowlatency flows, accommodating new flows at runtime and adapting existing flows accordingly becomes a challenging problem. In this extended abstract we summarize a previously published paper of us [1]. We combine software-defined networking (SDN), which provides better control of network flows, with TSN to be able to seamlessly migrate time-sensitive flows. For that, we formulate an optimization problem and propose different dynamic path configuration strategies under deterministic communication requirements. Our simulation results indicate that regularly reconfiguring the flow assignments can improve the latency of time-sensitive flows and can increase the number of flows embedded in the network around 4% in worst-case scenarios while still satisfying individual flow deadlines. KW - Datennetz KW - SDN KW - dynamic flow migration KW - reconfiguration KW - TSN KW - path computation Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-280743 ER - TY - RPRT A1 - Schmidt, João Pedro T1 - Local Self-Organization and the Third Sector: Between the Philanthropic and the Associative Approaches T1 - Lokale Selbstorganisation und der Dritte Sektor: Zwischen philanthropischen und assoziativen Ansätzen N2 - Civil society organizations only started to be considered a sector in the 1970s in the United States. Amitai Etzioni pioneered the use of the expression third sector, which became common in academic and political literature. However, in the United States, the non-profit sector concept gradually became more robust and was spread internationally based on the studies conducted by Lester Salomon and associated researchers. The theory built on the concept of the non-profit sector is strongly related to the North American cultural context, marked by the tradition of philanthropy and volunteerism, but with little importance given to associative and cooperative organizations. The non-profit sector is implicitly or explicitly conceived as part of the private sphere. In contrast, theoretical currents such as liberal communitarianism, the theories of cooperation, common goods, social capital, European social economy, and the Latin American solidarity economy highlight the primacy of cooperation in solving collective problems. These theories underpin the associative approach of the third sector and link it to the community, not to the market. This paper argues that the associative approach is more appropriate for international studies on the third sector and the relevance of self-organization. The third sector, i.e., the set of organizations created and maintained by civil society, is the inheritor of the millennial associative tradition, including both entities whose values are compatible with the common good and those with particularistic values, authoritarian and contrary to human rights. The third sector is not entirely virtuous, but it is a vital sector for solving great human problems. N2 - Zivilgesellschaftliche Organisationen wurden in den USA erst in den 1970er Jahren als ein eigenständiger Sektor betrachtet. Amitai Etzioni prägte hierbei den Begriff „dritter Sektor“, der in der akademischen und politischen Literatur üblich wurde. In den Ver-einigten Staaten wurde das Konzept des gemeinnützigen Sektors jedoch allmählich gefestigt und auf der Grundlage der von Lester Salomon und anderen Forschern durchgeführten Studien auch international verbreitet. Die Theorie, die auf dem Konzept des Non-Profit-Sektors aufbaut, ist stark mit dem nordamerikanischen kulturellen Kontext verbunden, der durch die Tradition der Philanthropie und des ehrenamtlichen Engagements geprägt ist, während assoziativen und genossenschaftlichen Organisationen wenig Bedeutung beigemessen wird. Der Non-Profit-Sektor wird implizit oder explizit als Teil der privaten Sphäre verstanden. Im Gegensatz dazu betonen theoretische Strömungen wie der liberale Kommunitaris-mus, die Theorien der Kooperation, der Gemeingüter, des Sozialkapitals, der europäischen Sozialwirtschaft und der lateinamerikanischen Solidarökonomie den Vorrang der Kooperation bei der Lösung kollektiver Probleme. Diese Theorien untermauern den assoziativen Ansatz des dritten Sektors und verbinden ihn mit der Gemeinschaft und nicht mit dem Markt. In diesem Papier wird argumentiert, dass der assoziative Ansatz für internationale Studien über den dritten Sektor und die Bedeutung der Selbstorganisation besser geeignet ist. Der dritte Sektor, d. h. die Gesamtheit der von der Zivilgesellschaft geschaffenen und unterhaltenen Organisationen, steht für das Erbe der tausendjährigen assoziativen Tradition, die sowohl Einrichtungen umfasst, deren Werte mit dem Gemeinwohl vereinbar sind, als auch solche mit partikularistischen, autoritären und menschenrechtswidrigen Werten. Der dritte Sektor ist nicht völlig tugendhaft, aber er ist ein wichtiger Bereich für die Lösung großer menschlicher Probleme. T3 - LoSAM Working Papers - 7 KW - Kommunitarismus KW - Nonprofit-Bereich KW - Selbstorganisation KW - Staat KW - Kooperation KW - communitarianism KW - common good KW - associativism KW - third sector Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-282803 ER - TY - RPRT A1 - Savvidis, Dimitrios A1 - Roth, Robert A1 - Tutsch, Dietmar T1 - Static Evaluation of a Wheel-Topology for an SDN-based Network Usecase T2 - Würzburg Workshop on Next-Generation Communication Networks (WueWoWas'22) N2 - The increased occurrence of Software-Defined-Networking (SDN) not only improves the dynamics and maintenance of network architectures, but also opens up new use cases and application possibilities. Based on these observations, we propose a new network topology consisting of a star and a ring topology. This hybrid topology will be called wheel topology in this paper. We have considered the static characteristics of the wheel topology and compare them with known other topologies. KW - Datennetz KW - SDN KW - topology KW - wheel Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-280715 ER - TY - RPRT A1 - Riegler, Clemens A1 - Werner, Lennart A1 - Kayal, Hakan T1 - MAPLE: Marsian Autorotation Probe Lander Experiment N2 - The first step towards aerial planetary exploration has been made. Ingenuity shows extremely promising results, and new missions are already underway. Rotorcraft are capable of flight. This capability could be utilized to support the last stages of Entry, Descent, and Landing. Thus, mass and complexity could be scaled down. Autorotation is one method of descent. It describes unpowered descent and landing, typically performed by helicopters in case of an engine failure. MAPLE is suggested to test these procedures and understand autorotation on other planets. In this series of experiments, the Ingenuity helicopter is utilized. Ingenuity would autorotate a ”mid-air-landing” before continuing with normal flight. Ultimately, the collected data shall help to understand autorotation on Mars and its utilization for interplanetary exploration. T3 - Raumfahrttechnik und Extraterrestrik - 2 KW - autorotation KW - descent KW - Mars KW - rotorcraft KW - landing KW - aerospace Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-282390 ER - TY - RPRT A1 - Riegler, Clemens A1 - Kayal, Hakan T1 - VELEX: Venus Lightning Experiment N2 - Lightning has fascinated humanity since the beginning of our existence. Different types of lightning like sprites and blue jets were discovered, and many more are theorized. However, it is very likely that these phenomena are not exclusive to our home planet. Venus’s dense and active atmosphere is a place where lightning is to be expected. Missions like Venera, Pioneer, and Galileo have carried instruments to measure electromagnetic activity. These measurements have indeed delivered results. However, these results are not clear. They could be explained by other effects like cosmic rays, plasma noise, or spacecraft noise. Furthermore, these lightning seem different from those we know from our home planet. In order to tackle these issues, a different approach to measurement is proposed. When multiple devices in different spacecraft or locations can measure the same atmospheric discharge, most other explanations become increasingly less likely. Thus, the suggested instrument and method of VELEX incorporates multiple spacecraft. With this approach, the question about the existence of lightning on Venus could be settled. T3 - Raumfahrttechnik und Extraterrestrik - 3 KW - Venus KW - Lightning KW - CubeSat KW - Balloon KW - Autorotation Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-282481 ER - TY - RPRT A1 - Raffeck, Simon A1 - Geißler, Stefan A1 - Hoßfeld, Tobias T1 - DBM: Decentralized Burst Mitigation for Self-Organizing LoRa Deployments T2 - Würzburg Workshop on Next-Generation Communication Networks (WueWoWas'22) N2 - This work proposes a novel approach to disperse dense transmission intervals and reduce bursty traffic patterns without the need for centralized control. Furthermore, by keeping the mechanism as close to the Long Range Wide Area Network (LoRaWAN) standard as possible the suggested mechanism can be deployed within existing networks and can even be co-deployed with other devices. KW - Datennetz KW - LoRa Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-280809 ER - TY - RPRT A1 - Odhah, Najib A1 - Grass, Eckhard A1 - Kraemer, Rolf T1 - Effective Rate of URLLC with Short Block-Length Information Theory T2 - Würzburg Workshop on Next-Generation Communication Networks (WueWoWas'22) N2 - Shannon channel capacity estimation, based on large packet length is used in traditional Radio Resource Management (RRM) optimization. This is good for the normal transmission of data in a wired or wireless system. For industrial automation and control, rather short packages are used due to the short-latency requirements. Using Shannon’s formula leads in this case to inaccurate RRM solutions, thus another formula should be used to optimize radio resources in short block-length packet transmission, which is the basic of Ultra-Reliable Low-Latency Communications (URLLCs). The stringent requirement of delay Quality of Service (QoS) for URLLCs requires a link-level channel model rather than a physical level channel model. After finding the basic and accurate formula of the achievable rate of short block-length packet transmission, the RRM optimization problem can be accurately formulated and solved under the new constraints of URLLCs. In this short paper, the current mathematical models, which are used in formulating the effective transmission rate of URLLCs, will be briefly explained. Then, using this rate in RRM for URLLC will be discussed. KW - Datennetz KW - URLLC KW - RRM KW - delay QoS exponent KW - decoding error rate KW - delay bound violation probability KW - short block-length KW - effective Bandwidth Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-280859 ER - TY - RPRT A1 - Loh, Frank A1 - Geißler, Stefan A1 - Hoßfeld, Tobias T1 - LoRaWAN Network Planning in Smart Environments: Towards Reliability, Scalability, and Cost Reduction T2 - Würzburg Workshop on Next-Generation Communication Networks (WueWoWas'22) N2 - The goal in this work is to present a guidance for LoRaWAN planning to improve overall reliability for message transmissions and scalability. At the end, the cost component is discussed. Therefore, a five step approach is presented that helps to plan a LoRaWAN deployment step by step: Based on the device locations, an initial gateway placement is suggested followed by in-depth frequency and channel access planning. After an initial planning phase, updates for channel access and the initial gateway planning is suggested that should also be done periodically during network operation. Since current gateway placement approaches are only studied with random channel access, there is a lot of potential in the cell planning phase. Furthermore, the performance of different channel access approaches is highly related on network load, and thus cell size and sensor density. Last, the influence of different cell planning ideas on expected costs are discussed. KW - Datennetz KW - LoRaWan Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-280829 ER -