TY  - GEN
A1  - Krawietz, Marian
A1  - Goebel, Jan
A1  - Albrecht, Sophia
A1  - Class, Fabian
A1  - Kohler, Ulrich
T1  - Leben in der ehemaligen DDR
BT  - Zusatzfragebogen im Rahmen der Befragung "Leben in Deutschland 2018" / Living in the GDR
Y1  - 2019
U6  - https://doi.org/10.5684/soep.ddr18
PB  - German Institute for Economic Research (DIW Berlin)
CY  - Berlin
ER  - 
TY  - GEN
A1  - Bin Tareaf, Raad
A1  - Berger, Philipp
A1  - Hennig, Patrick
A1  - Meinel, Christoph
T1  - Personality exploration system for online social networks
BT  - Facebook brands as a use case
T2  - 2018 IEEE/WIC/ACM International Conference on Web Intelligence (WI)
N2  - User-generated content on social media platforms is a rich source of latent information about individual variables. Crawling and analyzing this content provides a new approach for enterprises to personalize services and put forward product recommendations. In the past few years, brands made a gradual appearance on social media platforms for advertisement, customers support and public relation purposes and by now it became a necessity throughout all branches. This online identity can be represented as a brand personality that reflects how a brand is perceived by its customers. We exploited recent research in text analysis and personality detection to build an automatic brand personality prediction model on top of the (Five-Factor Model) and (Linguistic Inquiry and Word Count) features extracted from publicly available benchmarks. The proposed model reported significant accuracy in predicting specific personality traits form brands. For evaluating our prediction results on actual brands, we crawled the Facebook API for 100k posts from the most valuable brands' pages in the USA and we visualize exemplars of comparison results and present suggestions for future directions.
KW  - Big Five Model
KW  - Brand Personality
KW  - Personality Prediction
KW  - Machine Learning
KW  - Social Media Analysis
Y1  - 2019
SN  - 978-1-5386-7325-6
U6  - https://doi.org/10.1109/WI.2018.00-76
SP  - 301
EP  - 309
PB  - IEEE
CY  - New York
ER  - 
TY  - GEN
A1  - Andjelkovic, Marko
A1  - Babic, Milan
A1  - Li, Yuanqing
A1  - Schrape, Oliver
A1  - Krstić, Miloš
A1  - Kraemer, Rolf
T1  - Use of decoupling cells for mitigation of SET effects in CMOS combinational gates
T2  - 2018 25th IEEE International Conference on Electronics, Circuits and Systems (ICECS)
N2  - This paper investigates the applicability of CMOS decoupling cells for mitigating the Single Event Transient (SET) effects in standard combinational gates. The concept is based on the insertion of two decoupling cells between the gate's output and the power/ground terminals. To verify the proposed hardening approach, extensive SPICE simulations have been performed with standard combinational cells designed in IHP's 130 nm bulk CMOS technology. Obtained simulation results have shown that the insertion of decoupling cells results in the increase of the gate's critical charge, thus reducing the gate's soft error rate (SER). Moreover, the decoupling cells facilitate the suppression of SET pulses propagating through the gate. It has been shown that the decoupling cells may be a competitive alternative to gate upsizing and gate duplication for hardening the gates with lower critical charge and multiple (3 or 4) inputs, as well as for filtering the short SET pulses induced by low-LET particles.
KW  - decoupling cells
KW  - radiation hardening
KW  - SET effects
KW  - CMOS technology
KW  - combinational logic
Y1  - 2019
SN  - 978-1-5386-9562-3
U6  - https://doi.org/10.1109/ICECS.2018.8617996
SP  - 361
EP  - 364
PB  - IEEE
CY  - New York
ER  - 
TY  - GEN
A1  - Sianipar, Johannes Harungguan
A1  - Willems, Christian
A1  - Meinel, Christoph
T1  - Virtual machine integrity verification in Crowd-Resourcing Virtual Laboratory
T2  - 2018 IEEE 11th Conference on Service-Oriented Computing and Applications (SOCA)
N2  - In cloud computing, users are able to use their own operating system (OS) image to run a virtual machine (VM) on a remote host. The virtual machine OS is started by the user using some interfaces provided by a cloud provider in public or private cloud. In peer to peer cloud, the VM is started by the host admin. After the VM is running, the user could get a remote access to the VM to install, configure, and run services. For the security reasons, the user needs to verify the integrity of the running VM, because a malicious host admin could modify the image or even replace the image with a similar image, to be able to get sensitive data from the VM. We propose an approach to verify the integrity of a running VM on a remote host, without using any specific hardware such as Trusted Platform Module (TPM). Our approach is implemented on a Linux platform where the kernel files (vmlinuz and initrd) could be replaced with new files, while the VM is running. kexec is used to reboot the VM with the new kernel files. The new kernel has secret codes that will be used to verify whether the VM was started using the new kernel files. The new kernel is used to further measuring the integrity of the running VM.
KW  - Virtual Machine
KW  - Integrity Verification
KW  - Crowd-Resourcing
KW  - Cloud Computing
Y1  - 2019
SN  - 978-1-5386-9133-5
U6  - https://doi.org/10.1109/SOCA.2018.00032
SN  - 2163-2871
SP  - 169
EP  - 176
PB  - IEEE
CY  - New York
ER  - 
TY  - GEN
A1  - Brand, Thomas
A1  - Giese, Holger Burkhard
T1  - Towards Generic Adaptive Monitoring
T2  - 2018 IEEE 12th International Conference on Self-Adaptive and Self-Organizing Systems (SASO)
N2  - Monitoring is a key prerequisite for self-adaptive software and many other forms of operating software. Monitoring relevant lower level phenomena like the occurrences of exceptions and diagnosis data requires to carefully examine which detailed information is really necessary and feasible to monitor. Adaptive monitoring permits observing a greater variety of details with less overhead, if most of the time the MAPE-K loop can operate using only a small subset of all those details. However, engineering such an adaptive monitoring is a major engineering effort on its own that further complicates the development of self-adaptive software. The proposed approach overcomes the outlined problems by providing generic adaptive monitoring via runtime models. It reduces the effort to introduce and apply adaptive monitoring by avoiding additional development effort for controlling the monitoring adaptation. Although the generic approach is independent from the monitoring purpose, it still allows for substantial savings regarding the monitoring resource consumption as demonstrated by an example.
Y1  - 2019
SN  - 978-1-5386-5172-8
U6  - https://doi.org/10.1109/SASO.2018.00027
SN  - 1949-3673
SP  - 156
EP  - 161
PB  - IEEE
CY  - New York
ER  - 
TY  - GEN
A1  - Sianipar, Johannes Harungguan
A1  - Sukmana, Muhammad Ihsan Haikal
A1  - Meinel, Christoph
T1  - Moving sensitive data against live memory dumping, spectre and meltdown attacks
T2  - 26th International Conference on Systems Engineering (ICSEng)
N2  - The emergence of cloud computing allows users to easily host their Virtual Machines with no up-front investment and the guarantee of always available anytime anywhere. But with the Virtual Machine (VM) is hosted outside of user's premise, the user loses the physical control of the VM as it could be running on untrusted host machines in the cloud. Malicious host administrator could launch live memory dumping, Spectre, or Meltdown attacks in order to extract sensitive information from the VM's memory, e.g. passwords or cryptographic keys of applications running in the VM. In this paper, inspired by the moving target defense (MTD) scheme, we propose a novel approach to increase the security of application's sensitive data in the VM by continuously moving the sensitive data among several memory allocations (blocks) in Random Access Memory (RAM). A movement function is added into the application source code in order for the function to be running concurrently with the application's main function. Our approach could reduce the possibility of VM's sensitive data in the memory to be leaked into memory dump file by 2 5% and secure the sensitive data from Spectre and Meltdown attacks. Our approach's overhead depends on the number and the size of the sensitive data.
KW  - Virtual Machine
KW  - Memory Dumping
KW  - Security
KW  - Cloud Computing
KW  - Spectre
KW  - Meltdown
Y1  - 2019
SN  - 978-1-5386-7834-3
PB  - IEEE
CY  - New York
ER  - 
TY  - GEN
A1  - Richly, Keven
T1  - Leveraging spatio-temporal soccer data to define a graphical query language for game recordings
T2  - IEEE International Conference on Big Data (Big Data)
N2  - For professional soccer clubs, performance and video analysis are an integral part of the preparation and post-processing of games. Coaches, scouts, and video analysts extract information about strengths and weaknesses of their team as well as opponents by manually analyzing video recordings of past games. Since video recordings are an unstructured data source, it is a complex and time-intensive task to find specific game situations and identify similar patterns. In this paper, we present a novel approach to detect patterns and situations (e.g., playmaking and ball passing of midfielders) based on trajectory data. The application uses the metaphor of a tactic board to offer a graphical query language. With this interactive tactic board, the user can model a game situation or mark a specific situation in the video recording for which all matching occurrences in various games are immediately displayed, and the user can directly jump to the corresponding game scene. Through the additional visualization of key performance indicators (e.g.,the physical load of the players), the user can get a better overall assessment of situations. With the capabilities to find specific game situations and complex patterns in video recordings, the interactive tactic board serves as a useful tool to improve the video analysis process of professional sports teams.
KW  - Spatio-temporal data analysis
KW  - soccer analytics
KW  - graphical query language
Y1  - 2019
SN  - 978-1-5386-5035-6
U6  - https://doi.org/10.1109/BigData.2018.8622159
SN  - 2639-1589
SP  - 3456
EP  - 3463
PB  - IEEE
CY  - New York
ER  - 
TY  - GEN
A1  - Richly, Keven
T1  - A survey on trajectory data management for hybrid transactional and analytical workloads
T2  - IEEE International Conference on Big Data (Big Data)
N2  - Rapid advances in location-acquisition technologies have led to large amounts of trajectory data. This data is the foundation for a broad spectrum of services driven and improved by trajectory data mining. However, for hybrid transactional and analytical workloads, the storing and processing of rapidly accumulated trajectory data is a non-trivial task. In this paper, we present a detailed survey about state-of-the-art trajectory data management systems. To determine the relevant aspects and requirements for such systems, we developed a trajectory data mining framework, which summarizes the different steps in the trajectory data mining process. Based on the derived requirements, we analyze different concepts to store, compress, index, and process spatio-temporal data. There are various trajectory management systems, which are optimized for scalability, data footprint reduction, elasticity, or query performance. To get a comprehensive overview, we describe and compare different exciting systems. Additionally, the observed similarities in the general structure of different systems are consolidated in a general blueprint of trajectory management systems.
KW  - Trajectory Data Management
KW  - Spatio-Temporal Data
KW  - Survey
Y1  - 2019
SN  - 978-1-5386-5035-6
U6  - https://doi.org/10.1109/BigData.2018.8622394
SN  - 2639-1589
SP  - 562
EP  - 569
PB  - IEEE
CY  - New York
ER  - 
TY  - GEN
A1  - Zarriess, Sina
A1  - Schlangen, David
T1  - Objects of Unknown Categories
T2  - The 57th Annual Meeting of the Association for Computational Linguistics
N2  - Zero-shot learning in Language & Vision is the task of correctly labelling (or naming) objects of novel categories. Another strand of work in L&V aims at pragmatically informative rather than "correct" object descriptions, e.g. in reference games. We combine these lines of research and model zero-shot reference games, where a speaker needs to successfully refer to a novel object in an image. Inspired by models of "rational speech acts", we extend a neural generator to become a pragmatic speaker reasoning about uncertain object categories. As a result of this reasoning, the generator produces fewer nouns and names of distractor categories as compared to a literal speaker. We show that this conversational strategy for dealing with novel objects often improves communicative success, in terms of resolution accuracy of an automatic listener.
Y1  - 2019
SN  - 978-1-950737-48-2
SP  - 654
EP  - 659
PB  - Association for Computational Linguistics
CY  - Stroudsburg
ER  - 
TY  - GEN
A1  - Finch, Nicolle L.
A1  - Braker, I. P.
A1  - Reindl, Nicole
A1  - Barstow, Martin A.
A1  - Casewell, Sarah L.
A1  - Burleigh, M.
A1  - Kupfer, Thomas
A1  - Kilkenny, D.
A1  - Geier, Stephan Alfred
A1  - Schaffenroth, Veronika
A1  - Bertolami Miller, Marcelo Miguel
A1  - Taubenberger, Stefan
A1  - Freudenthal, Joseph
T1  - Spectral Analysis of Binary Pre-white Dwarf Systems
T2  - Radiative signatures from the cosmos
N2  - Short period double degenerate white dwarf (WD) binaries with periods of less than similar to 1 day are considered to be one of the likely progenitors of type Ia supernovae. These binaries have undergone a period of common envelope evolution. If the core ignites helium before the envelope is ejected, then a hot subdwarf remains prior to contracting into a WD. Here we present a comparison of two very rare systems that contain two hot subdwarfs in short period orbits. We provide a quantitative spectroscopic analysis of the systems using synthetic spectra from state-of-the-art non-LTE models to constrain the atmospheric parameters of the stars. We also use these models to determine the radial velocities, and thus calculate dynamical masses for the stars in each system.
Y1  - 2019
SN  - 978-1-58381-925-8
SN  - 1050-3390
VL  - 519
SP  - 231
EP  - 238
PB  - Astronomical soc pacific
CY  - San Fransisco
ER  - 
TY  - GEN
A1  - Kubatova, Brankica
A1  - Hamann, Wolf-Rainer
A1  - Kubat, Jiri
A1  - Oskinova, Lida
T1  - 3D Monte Carlo Radiative Transfer in Inhomogeneous Massive Star Winds
BT  - Application to Resonance Line Formation
T2  - Radiative signatures from the cosmos
N2  - Already for decades it has been known that the winds of massive stars are inhomogeneous (i.e. clumped). To properly model observed spectra of massive star winds it is necessary to incorporate the 3-D nature of clumping into radiative transfer calculations. In this paper we present our full 3-D Monte Carlo radiative transfer code for inhomogeneous expanding stellar winds. We use a set of parameters to describe dense as well as the rarefied wind components. At the same time, we account for non-monotonic velocity fields. We show how the 3-D density and velocity wind inhomogeneities strongly affect the resonance line formation. We also show how wind clumping can solve the discrepancy between P v and H alpha mass-loss rate diagnostics.
Y1  - 2019
SN  - 978-1-58381-925-8
SN  - 1050-3390
VL  - 519
SP  - 209
EP  - 212
PB  - Astronomical soc pacific
CY  - San Fransisco
ER  - 
TY  - GEN
A1  - Dolezalova, Barbora
A1  - Kubatova, Brankica
A1  - Kubat, Jiri
A1  - Hamann, Wolf-Rainer
T1  - The Quasi-WR Star HD 45166 Revisited
T2  - Radiative signatures from the cosmos
N2  - We studied the wind of the quasi Wolf-Rayet (qWR) star HD 45166. As a first step we modeled the observed UV spectra of this star by means of the state-of-the-art Potsdam Wolf-Rayet (PoWR) atmosphere code. We inferred the wind parameters and compared them with previous findings.
Y1  - 2019
SN  - 978-1-58381-925-8
SN  - 1050-3390
VL  - 519
SP  - 197
EP  - 200
PB  - Astronomical soc pacific
CY  - San Fransisco
ER  - 
TY  - GEN
A1  - Staubitz, Thomas
A1  - Meinel, Christoph
T1  - Graded Team Assignments in MOOCs
BT  - Effects of Team Composition and Further Factors on Team Dropout Rates and Performance
T2  - SCALE
N2  - The ability to work in teams is an important skill in today's work environments. In MOOCs, however, team work, team tasks, and graded team-based assignments play only a marginal role. To close this gap, we have been exploring ways to integrate graded team-based assignments in MOOCs. Some goals of our work are to determine simple criteria to match teams in a volatile environment and to enable a frictionless online collaboration for the participants within our MOOC platform. The high dropout rates in MOOCs pose particular challenges for team work in this context. By now, we have conducted 15 MOOCs containing graded team-based assignments in a variety of topics. The paper at hand presents a study that aims to establish a solid understanding of the participants in the team tasks. Furthermore, we attempt to determine which team compositions are particularly successful. Finally, we examine how several modifications to our platform's collaborative toolset have affected the dropout rates and performance of the teams.
KW  - Teamwork
KW  - MOOCs
KW  - Team-based Learning
KW  - Team Assessment
KW  - Peer Assessment
KW  - Project-based learning
Y1  - 2019
SN  - 978-1-4503-6804-9
U6  - https://doi.org/10.1145/3330430.3333619
PB  - Association for Computing Machinery
CY  - New York
ER  - 
TY  - GEN
A1  - Bock, Benedikt
A1  - Matysik, Jan-Tobias
A1  - Krentz, Konrad-Felix
A1  - Meinel, Christoph
T1  - Link Layer Key Revocation and Rekeying for the Adaptive Key Establishment Scheme
T2  - 2019 IEEE 5TH World Forum on internet of things (WF-IOT)
N2  - While the IEEE 802.15.4 radio standard has many features that meet the requirements of Internet of things applications, IEEE 802.15.4 leaves the whole issue of key management unstandardized. To address this gap, Krentz et al. proposed the Adaptive Key Establishment Scheme (AKES), which establishes session keys for use in IEEE 802.15.4 security. Yet, AKES does not cover all aspects of key management. In particular, AKES comprises no means for key revocation and rekeying. Moreover, existing protocols for key revocation and rekeying seem limited in various ways. In this paper, we hence propose a key revocation and rekeying protocol, which is designed to overcome various limitations of current protocols for key revocation and rekeying. For example, our protocol seems unique in that it routes around IEEE 802.15.4 nodes whose keys are being revoked. We successfully implemented and evaluated our protocol using the Contiki-NG operating system and aiocoap.
KW  - IEEE 802.15.4
KW  - key management
KW  - key establishment
KW  - key revocation
KW  - rekeying
KW  - link layer security
KW  - MAC security
Y1  - 2019
SN  - 978-1-5386-4980-0
U6  - https://doi.org/10.1109/WF-IoT.2019.8767211
SP  - 374
EP  - 379
PB  - IEEE
CY  - New York
ER  - 
TY  - GEN
A1  - Fischer, Martin H.
A1  - Shaki, Samuel
T1  - How to make talks less boring
T2  - Nature : the international weekly journal of science
Y1  - 2019
U6  - https://doi.org/10.1038/d41586-019-00153-6
SN  - 0028-0836
SN  - 1476-4687
VL  - 565
IS  - 7739
SP  - 294
EP  - 294
PB  - Nature Publ. Group
CY  - London
ER  - 
TY  - GEN
A1  - Nitze, Ingmar
A1  - Grosse, Guido
A1  - Jones, B. M.
A1  - Romanovsky, Vladimir E.
A1  - Boike, Julia
T1  - Author Correction: Nitze, I; Grosse, G; Jones, B.M.; Romanovsky, V.E.; Boike, J.: Remote sensing quantifies widespread abundance of permafrost region disturbances across the Arctic and Subarctic. - Nature Communications. - 9 (2018), 5423
T2  - Nature Communications
Y1  - 2019
U6  - https://doi.org/10.1038/s41467-019-08375-y
SN  - 2041-1723
VL  - 10
PB  - Nature Publ. Group
CY  - London
ER  - 
TY  - GEN
A1  - Ponce, Carol Barahona
A1  - Scherer, Dominique
A1  - Boekstegers, Felix
A1  - Garate-Calderon, Valentina
A1  - Jenab, Mazda
A1  - Aleksandrova, Krasimira
A1  - Katzke, Verena
A1  - Weiderpass, Elisabete
A1  - Bonet, Catalina
A1  - Moradi, Tahereh
A1  - Fischer, Krista
A1  - Bossers, Willem
A1  - Brenner, Hermann
A1  - Schöttker, Ben
A1  - Holleczek, Bernd
A1  - Hveem, Kristian
A1  - Eklund, Niina
A1  - Voelker, Uwe
A1  - Waldenberger, Melanie
A1  - Bermejo, Justo Lorenzo
T1  - Arsenic and gallbladder cancer risk
BT  - Mendelian randomization analysis of European prospective data
T2  - International journal of cancer
KW  - arsenic
KW  - gallbladder cancer
KW  - Mendelian randomization
Y1  - 2019
U6  - https://doi.org/10.1002/ijc.32837
SN  - 0020-7136
SN  - 1097-0215
VL  - 146
IS  - 9
SP  - 2648
EP  - 2650
PB  - Wiley
CY  - Hoboken
ER  - 
TY  - GEN
A1  - Petruk, Oleh
A1  - Kuzyo, T.
A1  - Orlando, S.
A1  - Pohl, Martin
A1  - Miceli, M.
A1  - Bocchino, F.
A1  - Beshley, V.
A1  - Brose, Robert
T1  - Erratum: Post-adiabatic supernova remnants in an interstellar magnetic field: oblique shocks and non-uniform environment. -  (Monthly notices of the Royal Astronomical Society. - 479, (2018), pg. 4253 - 4270)
T2  - Monthly notices of the Royal Astronomical Society
N2  - This is a correction notice for ‘Post-adiabatic supernova remnants in an interstellar magnetic field: oblique shocks and non-uniform environment’ (DOI: https://doi.org/10.1093/mnras/sty1750), which was published in MNRAS 479, 4253–4270 (2018). The publisher regrets to inform that the colour was missing from the colour scales in Figs 8(a)–(d) and Figs 9(a) and (b). This has now been corrected online. The publisher apologizes for this error.
KW  - errata
KW  - addenda
KW  - shock waves
KW  - ISM: magnetic fields
KW  - ISM: supernova remnants
Y1  - 2018
U6  - https://doi.org/10.1093/mnras/sty2861
SN  - 0035-8711
SN  - 1365-2966
VL  - 482
IS  - 2
SP  - 1979
EP  - 1980
PB  - Oxford Univ. Press
CY  - Oxford
ER  - 
TY  - GEN
A1  - Wagner, Dieter
T1  - Editorial
T2  - Journal of East European management studies : JEEMS
Y1  - 2019
U6  - https://doi.org/10.5771/0949-6181-2019-1-3
SN  - 0949-6181
SN  - 1862-0019
VL  - 24
IS  - 1
SP  - 3
EP  - 3
PB  - Nomos
CY  - Baden-Baden
ER  - 
TY  - GEN
A1  - Hickmann, Thomas
A1  - Partzsch, Lena
A1  - Pattberg, Philipp H.
A1  - Weiland, Sabine
T1  - Introduction
BT  - A political science perspective on the Anthropocene
T2  - The Anthropocene Debate and Political Science
N2  - Over the past decades, it has become more and more obvious that ongoing globalisation processes have substantial impacts on the natural environment. Studies reveal that intensified global economic relations have caused or accelerated dramatic changes in the Earth system, defined as the sum of our planet’s interacting physical, chemical, biological and human processes (Schellnhuber et al. 2004). Climate change, biodiversity loss, disrupted biogeochemical cycles, and land degradation are often cited as emblematic problems of global environmental change (Rockström et al. 2009; Steffen et al. 2015). In this context, the term Anthropocene has lately received widespread attention and gained some prominence in the academic literature
Y1  - 2019
SN  - 978-1-351-17412-1
SN  - 978-0-8153-8614-8
U6  - https://doi.org/10.4324/9781351174121
IS  - 1
SP  - 1
EP  - 12
PB  - Routledge
CY  - London
ER  -