TY  - JOUR
A1  - Grum, Marcus
A1  - Bender, Benedict
A1  - Alfa, A. S.
A1  - Gronau, Norbert
T1  - A decision maxim for efficient task realization within analytical network infrastructures
JF  - Decision support systems : DSS ; the international journal
N2  - Faced with the increasing needs of companies, optimal dimensioning of IT hardware is becoming challenging for decision makers. In terms of analytical infrastructures, a highly evolutionary environment causes volatile, time dependent workloads in its components, and intelligent, flexible task distribution between local systems and cloud services is attractive. With the aim of developing a flexible and efficient design for analytical infrastructures, this paper proposes a flexible architecture model, which allocates tasks following a machine-specific decision heuristic. A simulation benchmarks this system with existing strategies and identifies the new decision maxim as superior in a first scenario-based simulation.
KW  - Analytics
KW  - Architecture concepts
KW  - Cyber-physical systems
KW  - Internet of things
KW  - Task realization strategies
KW  - Simulation
Y1  - 2018
U6  - https://doi.org/10.1016/j.dss.2018.06.005
SN  - 0167-9236
SN  - 1873-5797
VL  - 112
SP  - 48
EP  - 59
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Krentz, Konrad-Felix
A1  - Meinel, Christoph
T1  - Denial-of-sleep defenses for IEEE 802.15.4 coordinated sampled listening (CSL)
JF  - Computer Networks
N2  - Coordinated sampled listening (CSL) is a standardized medium access control protocol for IEEE 80215.4 networks. Unfortunately, CSL comes without any protection against so-called denial-of-sleep attacks. Such attacks deprive energy-constrained devices of entering low-power sleep modes, thereby draining their charge. Repercussions of denial-of-sleep attacks include long outages, violated quality-of-service guarantees, and reduced customer satisfaction. However, while CSL has no built-in denial-of-sleep defenses, there already exist denial-of-sleep defenses for a predecessor of CSL, namely ContikiMAC. In this paper, we make two main contributions. First, motivated by the fact that CSL has many advantages over ContikiMAC, we tailor the existing denial-of-sleep defenses for ContikiMAC to CSL. Second, we propose several security enhancements to these existing denial-of-sleep defenses. In effect, our denial-of-sleep defenses for CSL mitigate denial-of-sleep attacks significantly better, as well as protect against a larger range of denial-of-sleep attacks than the existing denial-of-sleep defenses for ContikiMAC. We show the soundness of our denial-of-sleep defenses for CSL both analytically, as well as empirically using a whole new implementation of CSL. (C) 2018 Elsevier B.V. All rights reserved.
KW  - Internet of things
KW  - Link layer security
KW  - MAC security
KW  - Denial of sleep
Y1  - 2018
U6  - https://doi.org/10.1016/j.comnet.2018.10.021
SN  - 1389-1286
SN  - 1872-7069
VL  - 148
SP  - 60
EP  - 71
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - GEN
A1  - Grum, Marcus
A1  - Gronau, Norbert
T1  - Process modeling within augmented reality
BT  - the bidirectional interplay of two worlds
T2  - Business Modeling and Software Design, BMSD 2018
N2  - The collaboration during the modeling process is uncomfortable and characterized by various limitations. Faced with the successful transfer of first process modeling languages to the augmented world, non-transparent processes can be visualized in a more comprehensive way. With the aim to rise comfortability, speed, accuracy and manifoldness of real world process augmentations, a framework for the bidirectional interplay of the common process modeling world and the augmented world has been designed as morphologic box. Its demonstration proves the working of drawn AR integrations. Identified dimensions were derived from (1) a designed knowledge construction axiom, (2) a designed meta-model, (3) designed use cases and (4) designed directional interplay modes. Through a workshop-based survey, the so far best AR modeling configuration is identified, which can serve for benchmarks and implementations.
KW  - Augmented reality
KW  - Process modeling
KW  - Simulation process building
KW  - Generalized knowledge constructin axiom
KW  - Meta-model
KW  - Use cases Morphologic box
KW  - Industry 4.0
KW  - CPS
KW  - CPPS
KW  - Internet of things
Y1  - 2018
SN  - 978-3-319-94214-8
SN  - 978-3-319-94213-1
U6  - https://doi.org/10.1007/978-3-319-94214-8_7
SN  - 1865-1348
VL  - 319
SP  - 99
EP  - 115
PB  - Springer
CY  - Berlin
ER  -