TY - GEN A1 - McElvenny, James T1 - Otto Neuraths Isotype and C. K. Ogdens Basic English T2 - Diagrammatic Representation and Inference, Diagrams 2018 KW - Isotype KW - Vienna circle KW - Otto neurath KW - C. K. ogden KW - Basic English KW - Philosophy of language KW - Semiotics KW - International language Y1 - 2018 SN - 978-3-319-91376-6 SN - 978-3-319-91375-9 U6 - https://doi.org/10.1007/978-3-319-91376-6 SN - 0302-9743 SN - 1611-3349 VL - 10871 SP - 800 EP - 802 PB - Springer CY - Cham ER - TY - GEN A1 - Ahlgrimm, Frederik A1 - Westphal, Andrea A1 - Heck, Sebastian T1 - Why students travel abroad (and so many others do not) BT - Exploring predictors and decision-making processes in study-related student travel N2 - Over the past few years, studying abroad and other educational international experiences have become increasingly highly regarded. Nevertheless, research shows that only a minority of students actually take part in academic mobility programs. But what is it that distinguishes those students who take up these international opportunities from those who do not? In this study we reviewed recent quantitative studies on why (primarily German) students choose to travel abroad or not. This revealed a pattern of predictive factors. These indicate the key role played by students’ personal and social background, as well as previous international travel and the course of studies they are enrolled in. The study then focuses on teaching students. Both facilitating and debilitating factors are discussed and included in a model illustrating the decision-making process these students use. Finally, we discuss the practical implications for ways in which international, studyrelated travel might be increased in the future. We suggest that higher education institutions analyze individual student characteristics, offering differentiated programs to better meet the needs of different groups, thus raising the likelihood of disadvantaged students participating in academic international travel. KW - internationalization KW - international academic mobility KW - study-related student travel KW - study abroad KW - teaching students KW - teacher education Y1 - 2018 SN - 978-84-9048-690-0 U6 - https://doi.org/10.4995/HEAd18.2018.8161 SP - 1135 EP - 1142 PB - Universitat Politecnica de Valencia CY - Valencia ER - TY - GEN A1 - Perlich, Anja A1 - Meinel, Christoph T1 - Cooperative Note-Taking in Psychotherapy Sessions BT - an evaluation of the T2 - 2018 IEEE 20th International Conference on e-Health Networking, Applications and Services (Healthcom) N2 - In the course of patient treatments, psychotherapists aim to meet the challenges of being both a trusted, knowledgeable conversation partner and a diligent documentalist. We are developing the digital whiteboard system Tele-Board MED (TBM), which allows the therapist to take digital notes during the session together with the patient. This study investigates what therapists are experiencing when they document with TBM in patient sessions for the first time and whether this documentation saves them time when writing official clinical documents. As the core of this study, we conducted four anamnesis session dialogues with behavior psychotherapists and volunteers acting in the role of patients. Following a mixed-method approach, the data collection and analysis involved self-reported emotion samples, user experience curves and questionnaires. We found that even in the very first patient session with TBM, therapists come to feel comfortable, develop a positive feeling and can concentrate on the patient. Regarding administrative documentation tasks, we found with the TBM report generation feature the therapists save 60% of the time they normally spend on writing case reports to the health insurance. KW - user experience KW - emotion measurement KW - computer-mediated therapy KW - behavior psychotherapy KW - human-computer interaction KW - medical documentation KW - note-taking Y1 - 2018 SN - 978-1-5386-4294-8 PB - IEEE CY - New York ER - TY - GEN A1 - Granacher, Urs A1 - Völler, Heinz T1 - Gait speed is not magic, but is prognostically important in older patients T2 - European journal of preventive cardiology : the official ESC journal for primary & secondary cardiovascular prevention, rehabilitation and sports cardiology Y1 - 2020 U6 - https://doi.org/10.1177/2047487317744053 SN - 2047-4873 SN - 2047-4881 VL - 25 IS - 2 SP - 209 EP - 211 PB - Sage Publ. CY - London ER - TY - GEN A1 - Synodinos, Alexios D. A1 - Eldridge, David A1 - Geißler, Katja A1 - Jeltsch, Florian A1 - Lohmann, Dirk A1 - Midgley, Guy A1 - Blaum, Niels T1 - Remotely sensed canopy height reveals three pantropical ecosystem states BT - a comment T2 - Ecology : a publication of the Ecological Society of America Y1 - 2017 U6 - https://doi.org/10.1002/ecy.1997 SN - 0012-9658 SN - 1939-9170 VL - 99 IS - 1 SP - 231 EP - 234 PB - Wiley CY - Hoboken ER - TY - GEN A1 - Autenrieth, Marijke A1 - Ernst, Anja A1 - Deaville, Rob A1 - Demaret, Fabien A1 - Ijsseldijk, Lonneke L. A1 - Siebert, Ursula A1 - Tiedemann, Ralph T1 - Putative origin and maternal relatedness of male sperm whales (Physeter macrocephalus) recently stranded in the North Sea T2 - Mammalian biology = Zeitschrift für Säugetierkunde N2 - The globally distributed sperm whale (Physeter macrocephalus) has a partly matrilineal social structure with predominant male dispersal. At the beginning of 2016, a total of 30 male sperm whales stranded in five different countries bordering the southern North Sea. It has been postulated that these individuals were on a migration route from the north to warmer temperate and tropical waters where females live in social groups. By including samples from four countries (n = 27), this event provided a unique chance to genetically investigate the maternal relatedness and the putative origin of these temporally and spatially co-occuring male sperm whales. To utilize existing genetic resources, we sequenced 422 bp of the mitochondrial control region, a molecular marker for which sperm whale data are readily available from the entire distribution range. Based on four single nucleotide polymorphisms (SNPs) within the mitochondrial control region, five matrilines could be distinguished within the stranded specimens, four of which matched published haplotypes previously described in the Atlantic. Among these male sperm whales, multiple matrilineal lineages co-occur. We analyzed the population differentiation and could show that the genetic diversity of these male sperm whales is comparable to the genetic diversity in sperm whales from the entire Atlantic Ocean. We confirm that within this stranding event, males do not comprise maternally related individuals and apparently include assemblages of individuals from different geographic regions. (c) 2017 Deutsche Gesellschaft fur Saugetierkunde. Published by Elsevier GmbH. All rights reserved. KW - Mitochondrial DNA KW - Maternal relationships KW - Population genetics KW - Migration KW - Marine mammals Y1 - 2018 U6 - https://doi.org/10.1016/j.mambio.2017.09.003 SN - 1616-5047 SN - 1618-1476 VL - 88 SP - 156 EP - 160 PB - Elsevier CY - München ER - TY - GEN A1 - Barrett, Lindsay A1 - Eckstein, Lars A1 - Hurley, Andrew Wright A1 - Schwarz, Anja T1 - Remembering German-Australian colonial entanglement BT - an introduction T2 - Postcolonial studies : culture, politics, economy Y1 - 2018 U6 - https://doi.org/10.1080/13688790.2018.1443671 SN - 1368-8790 SN - 1466-1888 VL - 21 IS - 1 SP - 1 EP - 5 PB - Routledge, Taylor & Francis Group CY - Abingdon ER - TY - GEN A1 - Neubauer, Kai A1 - Haubelt, Christian A1 - Wanko, Philipp A1 - Schaub, Torsten H. T1 - Utilizing quad-trees for efficient design space exploration with partial assignment evaluation T2 - 2018 23rd Asia and South Pacific Design Automation Conference (ASP-DAC) N2 - Recently, it has been shown that constraint-based symbolic solving techniques offer an efficient way for deciding binding and routing options in order to obtain a feasible system level implementation. In combination with various background theories, a feasibility analysis of the resulting system may already be performed on partial solutions. That is, infeasible subsets of mapping and routing options can be pruned early in the decision process, which fastens the solving accordingly. However, allowing a proper design space exploration including multi-objective optimization also requires an efficient structure for storing and managing non-dominated solutions. In this work, we propose and study the usage of the Quad-Tree data structure in the context of partial assignment evaluation during system synthesis. Out experiments show that unnecessary dominance checks can be avoided, which indicates a preference of Quad-Trees over a commonly used list-based implementation for large combinatorial optimization problems. Y1 - 2018 SN - 978-1-5090-0602-1 U6 - https://doi.org/10.1109/ASPDAC.2018.8297362 SN - 2153-6961 SP - 434 EP - 439 PB - IEEE CY - New York ER - TY - GEN A1 - Wiegmann, Alex A1 - Rutschmann, Ronja A1 - Willemsen, Pascale T1 - Correction to: Empirically Investigating the Concept of Lying (vol 34, pg 591, 2017) T2 - Journal of Indian Council of Philosophical Research Y1 - 2018 U6 - https://doi.org/10.1007/s40961-017-0123-9 SN - 0970-7794 SN - 2363-9962 VL - 35 IS - 1 SP - 223 EP - 223 PB - Springer CY - New Dehli ER - TY - GEN A1 - Bournot, Estefanía T1 - Imaginar la nación BT - voces de la pluralidad en la Bolivia contemporánea. Introducción T2 - Iberoamercana Y1 - 2018 U6 - https://doi.org/10.18441/ibam.18.2018.67.7-10 SN - 1577-3388 SN - 2255-520X VL - 18 IS - 67 SP - 7 EP - 10 PB - Vervuert CY - Frankfurt, Main ER - TY - GEN A1 - Gawron, Marian A1 - Cheng, Feng A1 - Meinel, Christoph T1 - Automatic vulnerability classification using machine learning T2 - Risks and Security of Internet and Systems N2 - The classification of vulnerabilities is a fundamental step to derive formal attributes that allow a deeper analysis. Therefore, it is required that this classification has to be performed timely and accurate. Since the current situation demands a manual interaction in the classification process, the timely processing becomes a serious issue. Thus, we propose an automated alternative to the manual classification, because the amount of identified vulnerabilities per day cannot be processed manually anymore. We implemented two different approaches that are able to automatically classify vulnerabilities based on the vulnerability description. We evaluated our approaches, which use Neural Networks and the Naive Bayes methods respectively, on the base of publicly known vulnerabilities. KW - Vulnerability analysis KW - Security analytics KW - Data mining Machine learning KW - Neural Networks Y1 - 2018 SN - 978-3-319-76687-4 SN - 978-3-319-76686-7 U6 - https://doi.org/10.1007/978-3-319-76687-4_1 SN - 0302-9743 SN - 1611-3349 SP - 3 EP - 17 PB - Springer CY - Cham ER - TY - GEN A1 - Lühr, Hermann A1 - Wicht, Johannes A1 - Gilder, Stuart A. A1 - Holschneider, Matthias T1 - Preface T2 - Magnetic Fields in the Solar System: Planets, Moons and Solar Wind Interactions Y1 - 2018 SN - 978-3-319-64292-5 SN - 978-3-319-64291-8 SN - 0067-0057 VL - 448 SP - V EP - VI PB - Springer CY - Dordrecht ER - TY - GEN A1 - Lühr, Hermann A1 - Wicht, Johannes A1 - Gilder, Stuart A. A1 - Holschneider, Matthias T1 - General Introduction and Scientific Summary of the German Priority Program "PlanetMag" T2 - Magnetic Fields in the Solar System N2 - This book aims at understanding the diversity of planetary and lunar magnetic fields and their interaction with the solar wind. A synergistic interdisciplinary approach combines newly developed tools for data acquisition and analysis, computer simulations of planetary interiors and dynamos, models of solar wind interaction, measurement of terrestrial rocks and meteorites, and laboratory investigations. The following chapters represent a selection of some of the scientific findings derived by the 22 projects within the DFG Priority Program Planetary Magnetism" (PlanetMag). This introductory chapter gives an overview of the individual following chapters, highlighting their role in the overall goals of the PlanetMag framework. The diversity of the different contributions reflects the wide range of magnetic phenomena in our solar system. From the program we have excluded magnetism of the sun, which is an independent broad research discipline, but include the interaction of the solar wind with planets and moons. Within the subsequent 13 chapters of this book, the authors review the field centered on their research topic within PlanetMag. Here we shortly introduce the content of all the subsequent chapters and outline the context in which they should be seen. Y1 - 2018 SN - 978-3-319-64292-5 SN - 978-3-319-64291-8 U6 - https://doi.org/10.1007/978-3-319-64292-5_1 SN - 0067-0057 VL - 448 SP - 1 EP - 6 PB - Springer CY - Dordrecht ER - TY - GEN A1 - Bouckaert, Geert A1 - Kuhlmann, Sabine T1 - Foreword T2 - Sub-Municipal Governance in Europe: Decentralization Beyond the Municipal Tier Y1 - 2018 SN - 978-3-319-64725-8 SN - 978-3-319-64724-1 SP - V EP - VI PB - Palgrave CY - Basingstoke ER - TY - GEN A1 - Hlepas, Nikos A1 - Kersting, Norbert A1 - Kuhlmann, Sabine A1 - Swianiewicz, Pawel A1 - Teles, Filipe T1 - Introduction: Decentralization beyond the municipal tier T2 - Sub-Municipal Governance in Europe N2 - In Europe, different countries developed a rich variety of sub-municipal institutions. Out of the plethora of intra- and sub-municipal decentralization forms (reaching from local outposts of city administration to “quasi-federal” structures), this book focuses on territorial sub-municipal units (SMUs) which combine multipurpose territorial responsibility with democratic legitimacy and can be seen as institutions promoting the articulation and realization of collective choices at a sub-municipal level. Country chapters follow a common pattern that is facilitating systematic comparisons, while at the same time leaving enough space for national peculiarities and priorities chosen and highlighted by the authors, who also take advantage of the eventually existing empirical surveys and case studies. Y1 - 2018 SN - 978-3-319-64725-8 SN - 978-3-319-64724-1 U6 - https://doi.org/10.1007/978-3-319-64725-8_1 SP - 1 EP - 24 PB - Palgrave CY - Basingstoke ER - TY - GEN A1 - Pufahl, Luise A1 - Wong, Tsun Yin A1 - Weske, Mathias T1 - Design of an extensible BPMN process simulator T2 - Business Process Management Workshops (BPM 2017) N2 - Business process simulation is an important means for quantitative analysis of a business process and to compare different process alternatives. With the Business Process Model and Notation (BPMN) being the state-of-the-art language for the graphical representation of business processes, many existing process simulators support already the simulation of BPMN diagrams. However, they do not provide well-defined interfaces to integrate new concepts in the simulation environment. In this work, we present the design and architecture of a proof-of-concept implementation of an open and extensible BPMN process simulator. It also supports the simulation of multiple BPMN processes at a time and relies on the building blocks of the well-founded discrete event simulation. The extensibility is assured by a plug-in concept. Its feasibility is demonstrated by extensions supporting new BPMN concepts, such as the simulation of business rule activities referencing decision models and batch activities. KW - Business process simulation KW - Extensibility KW - BPMN Y1 - 2018 SN - 978-3-319-74030-0 SN - 978-3-319-74029-4 U6 - https://doi.org/10.1007/978-3-319-74030-0_62 SN - 1865-1348 VL - 308 SP - 782 EP - 795 PB - Springer CY - Berlin ER - TY - GEN A1 - Bauer, Matthias A1 - Malchow, Martin A1 - Meinel, Christoph T1 - Improving access to online lecture videos T2 - Proceedings of 2018 IEEE Global Engineering Education Conference (EDUCON) N2 - In university teaching today, it is common practice to record regular lectures and special events such as conferences and speeches. With these recordings, a large fundus of video teaching material can be created quickly and easily. Typically, lectures have a length of about one and a half hours and usually take place once or twice a week based on the credit hours. Depending on the number of lectures and other events recorded, the number of recordings available is increasing rapidly, which means that an appropriate form of provisioning is essential for the students. This is usually done in the form of lecture video platforms. In this work, we have investigated how lecture video platforms and the contained knowledge can be improved and accessed more easily by an increasing number of students. We came up with a multistep process we have applied to our own lecture video web portal that can be applied to other solutions as well. KW - E-Learning KW - Lecture Video Archive KW - E-Lecture KW - Lecture Recording KW - HTML5 KW - HLS KW - Flash Y1 - 2018 SN - 978-1-5386-2957-4 U6 - https://doi.org/10.1109/EDUCON.2018.8363361 SN - 2165-9567 SP - 1161 EP - 1168 PB - IEEE CY - New York ER - TY - GEN A1 - Malchow, Martin A1 - Bauer, Matthias A1 - Meinel, Christoph T1 - Embedded smart home — remote lab MOOC with optional real hardware experience for over 4000 students T2 - Proceedings of 2018 IEEE Global Engineering Education Conference (EDUCON) N2 - MOOCs (Massive Open Online Courses) become more and more popular for learners of all ages to study further or to learn new subjects of interest. The purpose of this paper is to introduce a different MOOC course style. Typically, video content is shown teaching the student new information. After watching a video, self-test questions can be answered. Finally, the student answers weekly exams and final exams like the self test questions. Out of the points that have been scored for weekly and final exams a certificate can be issued. Our approach extends the possibility to receive points for the final score with practical programming exercises on real hardware. It allows the student to do embedded programming by communicating over GPIO pins to control LEDs and measure sensor values. Additionally, they can visualize values on an embedded display using web technologies, which are an essential part of embedded and smart home devices to communicate with common APIs. Students have the opportunity to solve all tasks within the online remote lab and at home on the same kind of hardware. The evaluation of this MOOCs indicates the interesting design for students to learn an engineering technique with new technology approaches in an appropriate, modern, supporting and motivating way of teaching. KW - E-Learning KW - MOOC Remote Lab KW - Distance Learning KW - Embedded Programming KW - Smart Home Education Y1 - 2018 SN - 978-1-5386-2957-4 U6 - https://doi.org/10.1109/EDUCON.2018.8363353 SN - 2165-9567 SP - 1104 EP - 1111 PB - IEEE CY - New York ER - TY - GEN A1 - Malchow, Martin A1 - Bauer, Matthias A1 - Meinel, Christoph T1 - Enhance Learning in a Video Lecture Archive with Annotations T2 - Proceedings of OF 2018 IEEE Global Engineering Education Conference (EDUCON) N2 - When students watch learning videos online, they usually need to watch several hours of video content. In the end, not every minute of a video is relevant for the exam. Additionally, students need to add notes to clarify issues of a lecture. There are several possibilities to enhance the metadata of a video, e.g. a typical way to add user-specific information to an online video is a comment functionality, which allows users to share their thoughts and questions with the public. In contrast to common video material which can be found online, lecture videos are used for exam preparation. Due to this difference, the idea comes up to annotate lecture videos with markers and personal notes for a better understanding of the taught content. Especially, students learning for an exam use their notes to refresh their memories. To ease this learning method with lecture videos, we introduce the annotation feature in our video lecture archive. This functionality supports the students with keeping track of their thoughts by providing an intuitive interface to easily add, modify or remove their ideas. This annotation function is integrated in the video player. Hence, scrolling to a separate annotation area on the website is not necessary. Furthermore, the annotated notes can be exported together with the slide content to a PDF file, which can then be printed easily. Lecture video annotations support and motivate students to learn and watch videos from an E-Learning video archive. KW - E-Learning KW - Lecture Video Archive KW - Video annotations KW - E-Learning exam preparation Y1 - 2018 SN - 978-1-5386-2957-4 SN - 2165-9567 SP - 849 EP - 856 PB - IEEE CY - New York ER - TY - GEN A1 - Neubauer, Kai A1 - Wanko, Philipp A1 - Schaub, Torsten H. A1 - Haubelt, Christian T1 - Exact multi-objective design space exploration using ASPmT T2 - Proceedings of the 2018 Design, Automation & Test in Europe Conference & Exhibition (DATE) N2 - An efficient Design Space Exploration (DSE) is imperative for the design of modern, highly complex embedded systems in order to steer the development towards optimal design points. The early evaluation of design decisions at system-level abstraction layer helps to find promising regions for subsequent development steps in lower abstraction levels by diminishing the complexity of the search problem. In recent works, symbolic techniques, especially Answer Set Programming (ASP) modulo Theories (ASPmT), have been shown to find feasible solutions of highly complex system-level synthesis problems with non-linear constraints very efficiently. In this paper, we present a novel approach to a holistic system-level DSE based on ASPmT. To this end, we include additional background theories that concurrently guarantee compliance with hard constraints and perform the simultaneous optimization of several design objectives. We implement and compare our approach with a state-of-the-art preference handling framework for ASP. Experimental results indicate that our proposed method produces better solutions with respect to both diversity and convergence to the true Pareto front. Y1 - 2018 SN - 978-3-9819-2630-9 U6 - https://doi.org/10.23919/DATE.2018.8342014 SN - 1530-1591 SN - 1558-1101 SP - 257 EP - 260 PB - IEEE CY - New York ER - TY - GEN A1 - Bazhenova, Ekaterina A1 - Zerbato, Francesca A1 - Weske, Mathias T1 - Data-Centric Extraction of DMN Decision Models from BPMN Process Models T2 - Business Process Management Workshops N2 - Operational decisions in business processes can be modeled by using the Decision Model and Notation (DMN). The complementary use of DMN for decision modeling and of the Business Process Model and Notation (BPMN) for process design realizes the separation of concerns principle. For supporting separation of concerns during the design phase, it is crucial to understand which aspects of decision-making enclosed in a process model should be captured by a dedicated decision model. Whereas existing work focuses on the extraction of decision models from process control flow, the connection of process-related data and decision models is still unexplored. In this paper, we investigate how process-related data used for making decisions can be represented in process models and we distinguish a set of BPMN patterns capturing such information. Then, we provide a formal mapping of the identified BPMN patterns to corresponding DMN models and apply our approach to a real-world healthcare process. KW - Business process models KW - Process-related data KW - Decision models Y1 - 2018 SN - 978-3-319-74030-0 SN - 978-3-319-74029-4 U6 - https://doi.org/10.1007/978-3-319-74030-0_43 SN - 1865-1348 VL - 308 SP - 542 EP - 555 PB - Springer CY - Berlin ER - TY - GEN A1 - Poppenhagen, Nicole A1 - Temmen, Jens T1 - Across currents: Connections between Atlantic and (Trans) Pacific studies T2 - Atlantic studies : literary, cultural and historical perspectives KW - Transpacific studies KW - Pacific studies KW - Atlantic studies KW - transoceanic studies KW - archipelagic studies KW - Asian American studies KW - indigenous studies KW - oceanic discourse KW - Black Pacific Y1 - 2018 U6 - https://doi.org/10.1080/14788810.2017.1394131 SN - 1478-8810 SN - 1740-4649 VL - 15 IS - 2 SP - 149 EP - 159 PB - Routledge, Taylor & Francis Group CY - Abingdon ER - TY - GEN A1 - Blanchard, Gilles A1 - Scott, Clayton T1 - Corrigendum to: Classification with asymmetric label noise BT - Consistency and maximal denoising T2 - Electronic journal of statistics N2 - We point out a flaw in Lemma 15 of [1]. We also indicate how the main results of that section are still valid using a modified argument. Y1 - 2018 U6 - https://doi.org/10.1214/18-EJS1422 SN - 1935-7524 VL - 12 IS - 1 SP - 1779 EP - 1781 PB - Institute of Mathematical Statistics CY - Cleveland ER - TY - GEN A1 - Hermanussen, Michael A1 - Scheffler, Christiane A1 - Groth, Detlef A1 - Bogin, Barry T1 - Perceiving stunting - Student research and the "Lieschen Muller effect" in nutrition science T2 - Journal of biological and clinical anthropology : Anthropologischer Anzeiger ; Mitteilungsorgan der Gesellschaft für Anthropologie KW - stunting KW - undernutrition KW - strategic growth adjustments KW - competitive growth KW - community effect on height Y1 - 2018 U6 - https://doi.org/10.1127/anthranz/2018/0858 SN - 0003-5548 VL - 74 IS - 5 SP - 355 EP - 358 PB - Schweizerbart CY - Stuttgart ER - TY - GEN A1 - Boissier, Martin A1 - Kurzynski, Daniel T1 - Workload-Driven Horizontal Partitioning and Pruning for Large HTAP Systems T2 - 2018 IEEE 34th International Conference on Data Engineering Workshops (ICDEW) N2 - Modern server systems with large NUMA architectures necessitate (i) data being distributed over the available computing nodes and (ii) NUMA-aware query processing to enable effective parallel processing in database systems. As these architectures incur significant latency and throughout penalties for accessing non-local data, queries should be executed as close as possible to the data. To further increase both performance and efficiency, data that is not relevant for the query result should be skipped as early as possible. One way to achieve this goal is horizontal partitioning to improve static partition pruning. As part of our ongoing work on workload-driven partitioning, we have implemented a recent approach called aggressive data skipping and extended it to handle both analytical as well as transactional access patterns. In this paper, we evaluate this approach with the workload and data of a production enterprise system of a Global 2000 company. The results show that over 80% of all tuples can be skipped in average while the resulting partitioning schemata are surprisingly stable over time. Y1 - 2018 SN - 978-1-5386-6306-6 U6 - https://doi.org/10.1109/ICDEW.2018.00026 SP - 116 EP - 121 PB - IEEE CY - New York ER - TY - GEN A1 - Jakupec, Viktor T1 - Preface T2 - Development Aid-Populism and the End of the Neoliberal Agenda Y1 - 2018 SN - 978-3-319-72748-6 SN - 978-3-319-72747-9 U6 - https://doi.org/10.1007/978-3-319-72748-6 SN - 2211-4548 SN - 2211-4556 SP - V EP - IX PB - Springer CY - Cham ER - TY - GEN A1 - Chen, Pan A1 - Bornhorst, Julia A1 - Neely, M. Diana A1 - Avila, Daiana Silva T1 - Mechanisms and Disease Pathogenesis Underlying Metal-Induced Oxidative Stress T2 - Oxidative Medicine and Cellular Longevity Y1 - 2018 U6 - https://doi.org/10.1155/2018/7612172 SN - 1942-0900 SN - 1942-0994 PB - Hindawi CY - London ER - TY - GEN A1 - Wang, Jingwen A1 - Rychkov, Dmitry A1 - Gerhard, Reimund T1 - Influence of Charge Density on Charge Decay in Chemically Modified Polypropylene Films T2 - 2018 IEEE 2nd International Conference on Dielectrics (ICD) N2 - Previous work has shown that surface modification with orthophosphoric acid can significantly enhance the charge stability on polypropylene (PP) surface by generating deeper traps. In the present study, thermally stimulated potential-decay measurements revealed that the chemical treatment may also significantly increase the number of available trapping sites on the surface. Thus, as a consequence, the so-called "cross-over" phenomenon, which is observed on as-received and thermally treated PP electrets, may be overcome in a certain range of initial charge densities. Furthermore, the discharge behavior of chemically modified samples indicates that charges can be injected from the treated surface into the bulk, and/or charges of opposite polarity can be pulled from the rear electrode into the bulk at elevated temperatures and at the high electric fields that are caused by the deposited charges. In the bulk, a lack of deep traps causes rapid charge decay already in the temperature range around 95 degrees C. KW - polypropylene KW - surface charge stability KW - thermally stimulated discharge KW - cross-over effect KW - chemical modification Y1 - 2018 SN - 978-1-5386-6389-9 U6 - https://doi.org/10.1109/ICD.2018.8514718 PB - IEEE CY - New York ER - TY - GEN A1 - Raman Venkatesan, Thulasinath A1 - Frübing, Peter A1 - Gerhard, Reimund T1 - Influence of Composition and Preparation on Crystalline Phases and Morphology in Poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) Relaxor-Ferroelectric Terpolymer T2 - 2018 IEEE 2nd International Conference on Dielectrics (ICD) N2 - The influence of chemical composition and crystallisation conditions on the ferroelectric and paraelectric phases and the resulting morphology in Poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) (P(VDF-TrFE-CFE)) terpolymer films with 55.4/37.2/7.3 mol% or with 62.2/29.4/8.4 mol% of VDF/TrFE/CFE was studied. Poly(vinylidene fluoride trifluoroethylene) (P(VDF-TrFE)) with 75/25 mol% VDF/TrFE was employed as reference material. Fourier-Transform Infrared Spectroscopy (FTIR) was used to determine the fractions of the relevant terpolymer phases, and X-Ray Diffraction (XRD) was employed to assess the crystalline morphology. The FTIR results show an increase of the fraction of paraelectric phases after annealing. On the other hand, XRD results indicate a more stable paraelectric phase in the terpolymer with higher CFE content. KW - P(VDF-TrFE-CFE) terpolymer KW - relaxor-ferroelectric polymer KW - ferroelectric and paraelectric phases KW - Curie transition Y1 - 2018 SN - 978-1-5386-6389-9 U6 - https://doi.org/10.1109/ICD.2018.8514758 PB - IEEE CY - New York ER - TY - GEN A1 - Rychkov, Andrey A1 - Stojharov, Valery A1 - Kuznetsov, Alexey A1 - Rychkov, Dmitry T1 - The influence of recrystallization regimes on electret charge stability in low-density polyethylene films T2 - 2018 IEEE 2nd International Conference on Dielectrics (ICD) N2 - The electret state stability in nonpolar semicrystalline polymers is largely determined by the traps located at crystalline/ amorphous phase interfaces. Thus, the thermal history of such polymers should considerably influence their electret properties. In the present work, we investigate how recrystallization influences charge stability in low-density polyethylene corona electrets. It has been found that electret charge stability in quenched samples is higher than in slowly-crystallized ones. Phenomenologicaly, this can be explained by the increased number of deeper traps in samples with smaller crystallite size. KW - electrets KW - low-density polyethylene KW - crystallinity KW - quenching KW - recrystallization Y1 - 2018 SN - 978-1-5386-6389-9 SN - 978-1-5386-6388-2 SN - 978-1-5386-6390-5 U6 - https://doi.org/10.1109/ICD.2018.8514638 PB - IEEE CY - New York ER - TY - GEN A1 - Nguyen, Quyet Doan A1 - Gerhard, Reimund T1 - LDPE/MgO Nanocomposite Dielectrics for Electrical-Insulation and Ferroelectret-Transducer Applications T2 - 2018 IEEE 2nd International Conference on Dielectrics (ICD) N2 - Published results on LDPE/MgO nanocomposites (3wt%) show that they promise to be good electrical-insulation materials. In this work, the nanocomposites are examined as a potential (ferro-)electret material as well. Isothermal surface-potential decay measurements show that charged LDPE/MgO films still exhibit significant surface potentials after heating for 4 hours at 80 degrees C, which suggests good capabilities of LDPE/MgO nanocomposites to hold electric charges of both polarities. Open-tubular-channel ferroelectrets prepared from LDPE/MgO nanocomposite films show significant piezoelectricity with d(33) coefficients of about 20 pC/N after charging and are stable up to temperatures of at least 80 degrees C. Thus LDPE/MgO nanocomposites may become available as a new ferroelectret material. To increase their d(33) coefficients, it is desirable to optimize the charging conditions and the ferroelectret structure. KW - ferroelectrets KW - LDPE nanocomposites KW - electroacoustic probing KW - space-charge and polarization profiles KW - thermally stimulated discharge Y1 - 2018 SN - 978-1-5386-6389-9 SN - 978-1-5386-6388-2 SN - 978-1-5386-6390-5 PB - IEEE CY - New York ER - TY - GEN A1 - Ernst, Marion Eva T1 - Räumliche Metaphern in der Computer- und Internet-Terminologie T1 - Spatial metaphors in computer-related-terms and the internet-terminology T2 - Sprachen verbinden : Beiträge der 24. Linguistik- und Literaturtage, Brno/Tschechien, 2016 N2 - No other means of communication determines through its seemingly unrestricted possibilities our everyday life more than the internet. From the mid-90s onwards, more and more technical advancements in the field of communication appear on the market, which in turn call for new terminology. In the first place, it is the internet (essentially based on the interaction between users and experts), which requires effective nomenclature in order to mediate between lay users and their restricted knowledge on the one, and experts and their sophisticated terminology on the other hand. At the interface between the new and complex realities and the need for simple linguistic access, a huge quantity of metaphoric denominations is used, making abstract innovations more comprehensible. Metaphor in the internet discourse serves to "reduce verticality" (Stenschke 2006) between specialized terminology and common language. The paper deals with metaphors based on spatial concepts. Space and spatiality play a key role in cognitive theories of metaphor as these theories themselves (according to Lakoff/Johnson 1980) are often based on the application of spatial concepts to non-spatial relations. After describing spatial concepts in general (referring to the internet), the paper explores which kind of metaphor takes advantage of the complexity present in the internet and how the medial space is linguistically recaptured in terms of spatial perception. KW - Space and spatiality in the internet terminology KW - Space and metaphor KW - Function of the spatial metaphor Y1 - 2018 SN - 978-3-8300-9698-6 SN - 2364-561X VL - 6 SP - 61 EP - 70 PB - Kovac CY - Hamburg ER - TY - GEN A1 - Schmidt-Wellenburg, Christian A1 - Lebaron, Frederic T1 - There is no such thing as "the Economy" BT - Economic phenomena analysed from a field-theoretical perspective BT - Zur Analyse ökonomischer Phänomene aus feldtheoretischer Perspektive T2 - Historical Social Research N2 - This introductory essay to the HSR Special Issue “Economists, Politics, and Society” argues for a strong field-theoretical programme inspired by Pierre Bourdieu to research economic life as an integral part of different social forms. Its main aim is threefold. First, we spell out the very distinct Durkheimian legacy in Bourdieu’s thinking and the way he applies it in researching economic phenomena. Without this background, much of what is actually part of how Bourdieu analysed economic aspects of social life would be overlooked or reduced to mere economic sociology. Second, we sketch the main theoretical concepts and heuristics used to analyse economic life from a field perspective. Third, we focus on practical methodological issues of field-analytical research into economic phenomena. We conclude with a short summary of the basic characteristics of this approach and discuss the main insights provided by the contributions to this special issue. T2 - 'Die Ökonomie‘ gibt es nicht! KW - Economic sociology KW - field KW - Bourdieu KW - methodology KW - discourse KW - domination KW - state KW - economy Y1 - 2018 U6 - https://doi.org/10.12759/hsr.43.2018.3.7-38 SN - 0172-6404 VL - 43 IS - 3 SP - 7 EP - 38 PB - GESIS, Leibniz Institute for the Social Sciences CY - Cologne ER - TY - GEN A1 - Maier, Philipp A1 - Wolf, Jürgen A1 - Keilig, Thomas A1 - Krabbe, Alfred A1 - Duffard, Rene A1 - Ortiz, Jose-Luis A1 - Klinkner, Sabine A1 - Lengowski, Michael A1 - Müller, Thomas A1 - Lockowandt, Christian A1 - Krockstedt, Christian A1 - Kappelmann, Norbert A1 - Stelzer, Beate A1 - Werner, Klaus A1 - Geier, Stephan Alfred A1 - Kalkuhl, Christoph A1 - Rauch, Thomas A1 - Schanz, Thomas A1 - Barnstedt, Jürgen A1 - Conti, Lauro A1 - Hanke, Lars T1 - Towards a European Stratospheric Balloon Observatory BT - the ESBO design study T2 - Ground-based and Airborne Telescopes VII N2 - This paper presents the concept of a community-accessible stratospheric balloon-based observatory that is currently under preparation by a consortium of European research institutes and industry. We present the technical motivation, science case, instrumentation, and a two-stage image stabilization approach of the 0.5-m UV/visible platform. In addition, we briefly describe the novel mid-sized stabilized balloon gondola under design to carry telescopes in the 0.5 to 0.6 m range as well as the currently considered flight option for this platform. Secondly, we outline the scientific and technical motivation for a large balloon-based FIR telescope and the ESBO DS approach towards such an infrastructure. KW - astronomy KW - balloon telescopes KW - UV KW - far infrared KW - detectors KW - observatory Y1 - 2018 SN - 978-1-5106-1954-8 U6 - https://doi.org/10.1117/12.2319248 SN - 0277-786X SN - 1996-756X VL - 10700 PB - SPIE-INT Soc Optical Engineering CY - Bellingham ER - TY - GEN A1 - Wagner, Kathrin A1 - Oswald, Sascha Eric A1 - Frick, Annett T1 - Multitemporal soil moisture monitoring by use of optical remote sensing data in a dike relocation area T2 - Remote Sensing for Agriculture, Ecosystems, and Hydrology XX N2 - The nature restoration project ‘Lenzener Elbtalaue’, realised from 2002 to 2011 at the river Elbe, included the first large scale dike relocation in Germany (420 ha). Its aim was to initiate the development of endangered natural wetland habitats and processes, accompanied by greater biodiversity in the former grassland dominated area. The monitoring of spatial and temporal variations of soil moisture in this dike relocation area is therefore particularly important for estimating the restoration success. The topsoil moisture monitoring from 1990 to 2017 is based on the Soil Moisture Index (SMI)1 derived with the triangle method2 by use of optical remotely sensed data: land surface temperature and Normalized Differnce Vegetation Index are calculated from Landsat 4/5/7/8 data and atmospheric corrected by use of MODIS data. Spatial and temporal soil moisture variations in the restored area of the dike relocation are compared to the agricultural and pasture area behind the new dike. Ground truth data in the dike relocation area was obtained from field measurements in October 2017 with a FDR device. Additionally, data from a TERENO soil moisture sensor network (SoilNet) and mobile cosmic ray neutron sensing (CRNS) rover measurements are compared to the results of the triangle method for a region in the Harz Mountains (Germany). The SMI time series illustrates, that the dike relocation area has become significantly wetter between 1990 and 2017, due to restructuring measurements. Whereas the SMI of the dike hinterland reflects constant and drier conditions. An influence of climate is unlikely. However, validation of the dimensionless index with ground truth measurements is very difficult, mostly due to large differences in scale. KW - soil moisture KW - time series KW - SMI KW - triangle method KW - Landsat KW - restoration Y1 - 2018 SN - 978-1-5106-2150-3 U6 - https://doi.org/10.1117/12.2325319 SN - 0277-786X SN - 1996-756X VL - 10783 PB - SPIE-INT Soc Optical Engineering CY - Bellingham ER - TY - GEN A1 - Rheinwalt, Aljoscha A1 - Bookhagen, Bodo T1 - Network-based flow accumulation for point clouds BT - Facet-Flow Networks (FFN) T2 - Remote Sensing for Agriculture, Ecosystems, and Hydrology XX N2 - Point clouds provide high-resolution topographic data which is often classified into bare-earth, vegetation, and building points and then filtered and aggregated to gridded Digital Elevation Models (DEMs) or Digital Terrain Models (DTMs). Based on these equally-spaced grids flow-accumulation algorithms are applied to describe the hydrologic and geomorphologic mass transport on the surface. In this contribution, we propose a stochastic point-cloud filtering that, together with a spatial bootstrap sampling, allows for a flow accumulation directly on point clouds using Facet-Flow Networks (FFN). Additionally, this provides a framework for the quantification of uncertainties in point-cloud derived metrics such as Specific Catchment Area (SCA) even though the flow accumulation itself is deterministic. KW - lidar KW - point clouds KW - stochastic filtering KW - flow accumulation KW - drainage networks KW - uncertainty quantification KW - TIN KW - DEM Y1 - 2018 SN - 978-1-5106-2150-3 U6 - https://doi.org/10.1117/12.2318424 SN - 0277-786X SN - 1996-756X VL - 10783 PB - SPIE-INT Society of Photo-Optical Instrumentation Engineers CY - Bellingham ER - TY - GEN A1 - Giebler, Heiko A1 - Ruth, Saskia P. A1 - Tanneberg, Dag T1 - Why choice matters BT - revisiting and comparing measures of democracy T2 - Politics and Governance N2 - Measures of democracy are in high demand. Scientific and public audiences use them to describe political realities and to substantiate causal claims about those realities. This introduction to the thematic issue reviews the history of democracy measurement since the 1950s. It identifies four development phases of the field, which are characterized by three recurrent topics of debate: (1) what is democracy, (2) what is a good measure of democracy, and (3) do our measurements of democracy register real-world developments? As the answers to those questions have been changing over time, the field of democracy measurement has adapted and reached higher levels of theoretical and methodological sophistication. In effect, the challenges facing contemporary social scientists are not only limited to the challenge of constructing a sound index of democracy. Today, they also need a profound understanding of the differences between various measures of democracy and their implications for empirical applications. The introduction outlines how the contributions to this thematic issue help scholars cope with the recurrent issues of conceptualization, measurement, and application, and concludes by identifying avenues for future research. KW - application KW - conceptualization KW - democracy KW - democratic quality KW - measurement Y1 - 2018 U6 - https://doi.org/10.17645/pag.v6i1.1428 SN - 2183-2463 VL - 6 IS - 1 SP - 1 EP - 10 PB - Cogitatio Press CY - Lisbon ER - TY - GEN A1 - Kampmann, Christoph A1 - Brechenmacher, Thomas T1 - Konrad Repgen (1923-2017) T2 - Historisches Jahrbuch Y1 - 2018 SN - 978-3-451-38316-8 SN - 0018-2621 VL - 138 SP - 451 EP - 464 PB - Alber CY - München ER - TY - GEN A1 - Ellis, S. C. A1 - Bauer, S. A1 - Bacigalupo, C. A1 - Bland-Hawthorn, J. A1 - Bryant, J. J. A1 - Case, S. A1 - Content, R. A1 - Fechner, T. A1 - Giannone, D. A1 - Haynes, R. A1 - Hernandez, E. A1 - Horton, A. J. A1 - Klauser, U. A1 - Lawrence, J. S. A1 - Leon-Saval, S. G. A1 - Lindley, E. A1 - Löhmannsröben, Hans-Gerd A1 - Min, S. -S. A1 - Pai, N. A1 - Roth, M. A1 - Shortridge, K. A1 - Waller, L. A1 - Xavier, Pascal A1 - Zhelem, Ross T1 - PRAXIS: an OH suppression optimised near infrared spectrograph T2 - Ground-based and Airborne Instrumentation for Astronomy VII N2 - The problem of atmospheric emission from OH molecules is a long standing problem for near-infrared astronomy. PRAXIS is a unique spectrograph which is fed by fibres that remove the OH background and is optimised specifically to benefit from OH-Suppression. The OH suppression is achieved with fibre Bragg gratings, which were tested successfully on the GNOSIS instrument. PRAXIS uses the same fibre Bragg gratings as GNOSIS in its first implementation, and will exploit new, cheaper and more efficient, multicore fibre Bragg gratings in the second implementation. The OH lines are suppressed by a factor of similar to 1000, and the expected increase in the signal-to-noise in the interline regions compared to GNOSIS is a factor of similar to 9 with the GNOSIS gratings and a factor of similar to 17 with the new gratings. PRAXIS will enable the full exploitation of OH suppression for the first time, which was not achieved by GNOSIS (a retrofit to an existing instrument that was not OH-Suppression optimised) due to high thermal emission, low spectrograph transmission and detector noise. PRAXIS has extremely low thermal emission, through the cooling of all significantly emitting parts, including the fore-optics, the fibre Bragg gratings, a long length of fibre, and the fibre slit, and an optical design that minimises leaks of thermal emission from outside the spectrograph. PRAXIS has low detector noise through the use of a Hawaii-2RG detector, and a high throughput through a efficient VPH based spectrograph. PRAXIS will determine the absolute level of the interline continuum and enable observations of individual objects via an IFU. In this paper we give a status update and report on acceptance tests. KW - Near infrared KW - spectroscopy KW - OH suppression KW - astrophotonics KW - fibre Bragg gratings Y1 - 2018 SN - 978-1-5106-1958-6 U6 - https://doi.org/10.1117/12.2311898 SN - 0277-786X SN - 1996-756X VL - 10702 PB - SPIE-INT Soc Optical Engineering CY - Bellingham ER - TY - GEN A1 - Böckmann, Christine A1 - Ritter, Christoph A1 - Cappelletti, David T1 - Mathematical tool for a closure study of aerosol microphysical property retrieval using lidar and photometer data T2 - IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium N2 - We present a project combining lidar, photometer and particle counter data with a regularization software tool for a closure study of aerosol microphysical property retrieval. In a first step only lidar data are used to retrieve the particle size distribution (PSD). Secondly, photometer data are added, which results in a good consistency of the retrieved PSDs. Finally, those retrieved PSDs may be compared with the measured PSD from a particle counter. The data here were taken in Ny Alesund, Svalbard, as an example. KW - Aerosol KW - Raman lidar KW - photometer KW - inversion KW - regularization KW - particle microphysics Y1 - 2018 SN - 978-1-5386-7150-4 U6 - https://doi.org/10.1109/IGARSS.2018.8518674 SN - 2153-6996 SP - 5575 EP - 5578 PB - IEEE CY - New York ER - TY - GEN A1 - Hesse, Pia T1 - Comment: neither Sunken Vessel nor Blooming Flower! The Lotus Principle and International Humanitarian Law T2 - International Humanitarian Law in Areas of Limited Statehood: Adaptable and Legitimate or Rigid and Unreasonable? Y1 - 2018 SN - 978-3-8452-8955-7 SN - 978-3-8487-4807-5 U6 - https://doi.org/10.5771/9783845289557-80 SP - 80 EP - 85 PB - Nomos CY - Baden-Baden ER - TY - GEN A1 - Razzaq, Misbah A1 - Kaminski, Roland A1 - Romero, Javier A1 - Schaub, Torsten H. A1 - Bourdon, Jeremie A1 - Guziolowski, Carito T1 - Computing diverse boolean networks from phosphoproteomic time series data T2 - Computational Methods in Systems Biology N2 - Logical modeling has been widely used to understand and expand the knowledge about protein interactions among different pathways. Realizing this, the caspo-ts system has been proposed recently to learn logical models from time series data. It uses Answer Set Programming to enumerate Boolean Networks (BNs) given prior knowledge networks and phosphoproteomic time series data. In the resulting sequence of solutions, similar BNs are typically clustered together. This can be problematic for large scale problems where we cannot explore the whole solution space in reasonable time. Our approach extends the caspo-ts system to cope with the important use case of finding diverse solutions of a problem with a large number of solutions. We first present the algorithm for finding diverse solutions and then we demonstrate the results of the proposed approach on two different benchmark scenarios in systems biology: (1) an artificial dataset to model TCR signaling and (2) the HPN-DREAM challenge dataset to model breast cancer cell lines. KW - Diverse solution enumeration KW - Answer set programming KW - Boolean Networks KW - Model checking KW - Time series data Y1 - 2018 SN - 978-3-319-99429-1 SN - 978-3-319-99428-4 U6 - https://doi.org/10.1007/978-3-319-99429-1_4 SN - 0302-9743 SN - 1611-3349 VL - 11095 SP - 59 EP - 74 PB - Springer CY - Berlin ER - TY - GEN A1 - Smith, Taylor A1 - Bookhagen, Bodo T1 - Using passive microwave data to understand spatio-temporal trends and dynamics in snow-water storage in High Mountain Asia T2 - active and passive microwave remote sensing for environmental monitoring II N2 - High Mountain Asia provides water for more than a billion downstream users. Many catchments receive the majority of their yearly water budget in the form of snow - the vast majority of which is not monitored by sparse weather networks. We leverage passive microwave data from the SSMI series of satellites (SSMI, SSMI/S, 1987-2016), reprocessed to 3.125 km resolution, to examine trends in the volume and spatial distribution of snow-water equivalent (SWE) in the Indus Basin. We find that the majority of the Indus has seen an increase in snow-water storage. There exists a strong elevation-trend relationship, where high-elevation zones have more positive SWE trends. Negative trends are confined to the Himalayan foreland and deeply-incised valleys which run into the Upper Indus. This implies a temperature-dependent cutoff below which precipitation increases are not translated into increased SWE. Earlier snowmelt or a higher percentage of liquid precipitation could both explain this cutoff.(1) Earlier work 2 found a negative snow-water storage trend for the entire Indus catchment over the time period 1987-2009 (-4 x 10(-3) mm/yr). In this study based on an additional seven years of data, the average trend reverses to 1.4 x 10(-3). This implies that the decade since the mid-2000s was likely wetter, and positively impacted long-term SWE trends. This conclusion is supported by an analysis of snowmelt onset and end dates which found that while long-term trends are negative, more recent (since 2005) trends are positive (moving later in the year).(3) KW - Passive Microwave KW - Snow KW - Climate Change KW - High Mountain Asia Y1 - 2018 SN - 978-1-5106-2160-2 U6 - https://doi.org/10.1117/12.2323827 SN - 0277-786X SN - 1996-756X VL - 10788 PB - SPIE-INT Soc Optical Engineering CY - Bellingham ER - TY - GEN A1 - Steinberg, Pablo T1 - Only one Component of a holistic Nutrition Policy T1 - Nur ein Baustein einer ganzheitlichen Ernährungspolitik T2 - Fleischwirtschaft Y1 - 2018 SN - 0015-363X VL - 98 IS - 11 SP - 8 EP - 9 PB - Deutscher Fachverlag GmbH CY - Frankfurt am Main ER - TY - GEN A1 - Ion, Alexandra A1 - Baudisch, Patrick Markus T1 - Metamaterial Devices N2 - In our hands-on demonstration, we show several objects, the functionality of which is defined by the objects' internal micro-structure. Such metamaterial machines can (1) be mechanisms based on their microstructures, (2) employ simple mechanical computation, or (3) change their outside to interact with their environment. They are 3D printed from one piece and we support their creating by providing interactive software tools. KW - Metamaterials KW - microstructures KW - fabrication KW - programmable matter Y1 - 2018 SN - 978-1-4503-5819-4 U6 - https://doi.org/10.1145/3214822.3214827 PB - Association for Computing Machinery CY - New York ER - TY - GEN A1 - Torkura, Kennedy A. A1 - Sukmana, Muhammad Ihsan Haikal A1 - Meinig, Michael A1 - Kayem, Anne V. D. M. A1 - Cheng, Feng A1 - Meinel, Christoph A1 - Graupner, Hendrik T1 - Securing cloud storage brokerage systems through threat models T2 - Proceedings IEEE 32nd International Conference on Advanced Information Networking and Applications (AINA) N2 - Cloud storage brokerage is an abstraction aimed at providing value-added services. However, Cloud Service Brokers are challenged by several security issues including enlarged attack surfaces due to integration of disparate components and API interoperability issues. Therefore, appropriate security risk assessment methods are required to identify and evaluate these security issues, and examine the efficiency of countermeasures. A possible approach for satisfying these requirements is employment of threat modeling concepts, which have been successfully applied in traditional paradigms. In this work, we employ threat models including attack trees, attack graphs and Data Flow Diagrams against a Cloud Service Broker (CloudRAID) and analyze these security threats and risks. Furthermore, we propose an innovative technique for combining Common Vulnerability Scoring System (CVSS) and Common Configuration Scoring System (CCSS) base scores in probabilistic attack graphs to cater for configuration-based vulnerabilities which are typically leveraged for attacking cloud storage systems. This approach is necessary since existing schemes do not provide sufficient security metrics, which are imperatives for comprehensive risk assessments. We demonstrate the efficiency of our proposal by devising CCSS base scores for two common attacks against cloud storage: Cloud Storage Enumeration Attack and Cloud Storage Exploitation Attack. These metrics are then used in Attack Graph Metric-based risk assessment. Our experimental evaluation shows that our approach caters for the aforementioned gaps and provides efficient security hardening options. Therefore, our proposals can be employed to improve cloud security. KW - Cloud-Security KW - Threat Models KW - Security Metrics KW - Security Risk Assessment KW - Secure Configuration Y1 - 2018 SN - 978-1-5386-2195-0 U6 - https://doi.org/10.1109/AINA.2018.00114 SN - 1550-445X SP - 759 EP - 768 PB - IEEE CY - New York ER - TY - GEN A1 - Mawass, Mohamad-Assaad A1 - Arora, Ashima A1 - Sandig, Oliver A1 - Luo, Chen A1 - Unal, Ahmet A. A1 - Radu, Florin A1 - Valencia, Sergio A1 - Kronast, Florian T1 - Spatially resolved investigation of all optical magnetization switching in TbFe alloys T2 - 2018 IEEE International Magnetics Conference (INTERMAG) N2 - High storage density magnetic devices rely on the precise, reliable and ultrafast switching times of the magnetic states. Optical control of magnetization using femtosecond laser without applying any external magnetic field offers the advantage of switching magnetic states at ultrashort time scales, which has attracted a significant attention. Recently, it has been reported and demonstrated the,so-called, all-optical helicity-dependent switching (AO-HDS) in which a circularly polarized femtosecond laser pulse switches the magnetization of a ferromagnetic thin film as function of laser helicity [1]. Afterward, in more recent studies, it has been reported that AO-HDS is a general phenomenon existing in magnetic materials ranging from rare earth - transition metals ferrimagnetic (e.g. alloys, multilayers and hetero-structures system) to even ferromagnetic thin films. Among numerous studies in the literature which are discussing the microscopic origin of AO-HDS in ferromagnets or ferrimagnetic alloys, the most renowned concepts are momentum transfer via Inverse Faraday Effect (IFE) [1-3]and the concept of preferential thermal demagnetization for one magnetization direction by heating close to Tc (Curie temperature) in the presence of magnetic circular dichroism (MCD) [4-6]. In this study, we investigate all-optical magnetic switching using a stationary femtosecond laser spot (3-5 μm) in TbFe alloys via photoemission electron microscopy (PEEM) and x-ray magnetic circular dichroism (XMCD) with a spatial resolution of approximately 30 nm. We spatially characterize the effect of laser heating and local temperature profile created across the laser spot on AO-HDS in TbFe thin films. We find that AO-HDS occurs only in a `ring' shaped region surrounding the thermally demagnetized region formed by the laser spot and the formation of switched domains relies further on thermally induced domain wall motion. Our temperature dependent measurements highlight the importance of attainin... Y1 - 2018 SN - 978-1-5386-6425-4 U6 - https://doi.org/10.1109/INTMAG.2018.8508211 PB - IEEE CY - New York ER - TY - GEN A1 - Ehmann, Lisa A1 - Zoller, Michael A1 - Minichmayr, Iris K. A1 - Schmitt, Maximilian V. A1 - Hartung, Niklas A1 - Huisinga, Wilhelm A1 - Zander, Johannes A1 - Kloft, Charlotte T1 - Development of a tool to identify intensive care patients at risk of meropenem therapy failure T2 - International Journal of Clinical Pharmacy Y1 - 2018 SN - 2210-7703 SN - 2210-7711 VL - 40 IS - 1 SP - 317 EP - 317 PB - Springer CY - Dordrecht ER - TY - GEN A1 - Diaz, Sergio A1 - Mendez, Diego A1 - Schölzel, Mario T1 - Dynamic Gallager-Humblet-Spira Algorithm for Wireless Sensor Networks T2 - 2018 IEEE Colombian Conference on Communications and Computing (COLCOM) N2 - The problem of constructing and maintaining a tree topology in a distributed manner is a challenging task in WSNs. This is because the nodes have limited computational and memory resources and the network changes over time. We propose the Dynamic Gallager-Humblet-Spira (D-GHS) algorithm that builds and maintains a minimum spanning tree. To do so, we divide D-GHS into four phases, namely neighbor discovery, tree construction, data collection, and tree maintenance. In the neighbor discovery phase, the nodes collect information about their neighbors and the link quality. In the tree construction, D-GHS finds the minimum spanning tree by executing the Gallager-Humblet-Spira algorithm. In the data collection phase, the sink roots the minimum spanning tree at itself, and each node sends data packets. In the tree maintenance phase, the nodes repair the tree when communication failures occur. The emulation results show that D-GHS reduces the number of control messages and the energy consumption, at the cost of a slight increase in memory size and convergence time. KW - Minimum spanning tree KW - Tree maintenance Y1 - 2018 SN - 978-1-5386-6820-7 PB - IEEE CY - New York ER - TY - GEN A1 - Aranda, Juan A1 - Schölzel, Mario A1 - Mendez, Diego A1 - Carrillo, Henry T1 - An energy consumption model for multiModal wireless sensor networks based on wake-up radio receivers T2 - 2018 IEEE Colombian Conference on Communications and Computing (COLCOM) N2 - Energy consumption is a major concern in Wireless Sensor Networks. A significant waste of energy occurs due to the idle listening and overhearing problems, which are typically avoided by turning off the radio, while no transmission is ongoing. The classical approach for allowing the reception of messages in such situations is to use a low-duty-cycle protocol, and to turn on the radio periodically, which reduces the idle listening problem, but requires timers and usually unnecessary wakeups. A better solution is to turn on the radio only on demand by using a Wake-up Radio Receiver (WuRx). In this paper, an energy model is presented to estimate the energy saving in various multi-hop network topologies under several use cases, when a WuRx is used instead of a classical low-duty-cycling protocol. The presented model also allows for estimating the benefit of various WuRx properties like using addressing or not. KW - Energy efficiency KW - multimodal wireless sensor network KW - low-duty-cycling KW - wake-up radio Y1 - 2018 SN - 978-1-5386-6820-7 U6 - https://doi.org/10.1109/ColComCon.2018.8466728 PB - IEEE CY - New York ER -