TY  - JOUR
A1  - El Quardi, A.
A1  - Streckert, J.
A1  - Bitz, Andreas
A1  - Münkner, S.
A1  - Engel, J.
A1  - Hansen, V.
T1  - New fin-line devices for radiofrequency exposure of small biological samples in vitro allowing whole-cell patch clamp recordings
JF  - Bioelectromagnetics
N2  - The development and analysis of three waveguides for the exposure of small biological in vitro samples to mobile communication signals at 900 MHz (GSM, Global System for Mobile Communications), 1.8 GHz (GSM), and 2 GHz (UMTS, Universal Mobile Telecommunications System) is presented. The waveguides were based on a fin-line concept and the chamber containing the samples bathed in extracellular solution was placed onto two fins with a slot in between, where the exposure field concentrates. Measures were taken to allow for patch clamp recordings during radiofrequency (RF) exposure. The necessary power for the achievement of the maximum desired specific absorption rate (SAR) of 20 W/kg (average over the mass of the solution) was approximately Pin = 50 mW, Pin = 19 mW, and Pin = 18 mW for the 900 MHz, 1800 MHz, and 2 GHz devices, respectively. At 20 W/kg, a slight RF-induced temperature elevation in the solution of no more than 0.3 °C was detected, while no thermal offsets due to the electromagnetic exposure could be detected at the lower SAR settings (2, 0.2, and 0.02 W/kg). A deviation of 10% from the intended solution volume yielded a calculated SAR deviation of 8% from the desired value. A maximum ±10% variation in the local SAR could occur when the position of the patch clamp electrode was altered within the area where the cells to be investigated were located.
Y1  - 2011
U6  - http://dx.doi.org/10.1002/bem.20621
SN  - 1521-186X
VL  - 32
IS  - 2
SP  - 102
EP  - 112
PB  - Wiley
CY  - Weinheim
ER  - 
TY  - CHAP
A1  - Czarnecki, Christian
A1  - Winkelmann, Axel
A1  - Spiliopoulou, Myra
ED  - Pokorny, Jaroslav
ED  - Repa, Vaclav
ED  - Richta, Karel
ED  - Wojtkowski, Wita
ED  - Linger, Henry
ED  - Barry, Chris
ED  - Lang, Michael
T1  - Making business systems in the telecommunication industry more customer-oriented
T2  - Information Systems Development : Business Systems and Services: Modeling and Development
N2  - Market changes have forced telecommunication companies to transform their business. Increased competition, short innovation cycles, changed usage patterns, increased customer expectations and cost reduction are the main drivers. Our objective is to analyze to what extend transformation projects have improved the orientation towards the end-customers. Therefore, we selected 38 real-life case studies that are dealing with customer orientation. Our analysis is based on a telecommunication-specific framework that aligns strategy, business processes and information systems. The result of our analysis shows the following: transformation projects that aim to improve the customer orientation are combined with clear goals on costs and revenue of the enterprise. These projects are usually directly linked to the customer touch points, but also to the development and provisioning of products. Furthermore, the analysis shows that customer orientation is not the sole trigger for transformation. There is no one-fits-all solution; rather, improved customer orientation needs aligned changes of business processes as well as information systems related to different parts of the company.
KW  - Business Process
KW  - Customer Orientation
KW  - Enterprise Architecture
KW  - Transformation Project
KW  - Telecommunication Industry
Y1  - 2011
SN  - 978-1-4419-9645-9 (Print)
SN  - 978-1-4419-9790-6 (Online)
U6  - http://dx.doi.org/10.1007/978-1-4419-9790-6_14
N1  - 19th International Conference on Information Systems Development held in Prague, Czech Republic, August 25 - 27, 2010.
SP  - 169
EP  - 180
PB  - Springer
CY  - New York
ER  - 
TY  - CHAP
A1  - Schneckenburger, N.
A1  - Franzen, N.
A1  - Gligorevic, Snjezana
A1  - Schnell, M.
T1  - L-band compatibility of LDACS1
T2  - IEEE/AIAA 30th Digital Avionics Systems Conference (DASC) : 16 - 20 Oct. 2011, Seattle, Wash.
Y1  - 2011
SN  - 978-1-61284-797-9
SN  - 2155-7195
SP  - 4C3-1
EP  - 4C3-11
ER  - 
TY  - CHAP
A1  - Gligorevic, Snjezana
A1  - Schneckenburger, N.
A1  - Franzen, N.
A1  - Schnell, Michael
A1  - Müller, S.
A1  - Günzel, H.
T1  - L-Band compatibility of LDACS1
T2  - 3rd CEAS Air and Space Conference, 24 - 28 October 2011, Venezia, Italy
Y1  - 2011
SP  - 1
EP  - 8
ER  - 
TY  - JOUR
A1  - Engels, Elmar
A1  - Krauskopf, S.
T1  - Innovation in Motion-Logic programming - a versatile interface
JF  - Proceedings to the 12th International Workshop on Research and Education in Mechatronics, REM 2011, Kocaeli, Turkey, 15.09.-16.09.2011
Y1  - 2011
SN  - 978-975-8047-96-3
PB  - -
ER  - 
TY  - JOUR
A1  - Hamm, Laurits
A1  - Hartung, Frank
T1  - High Quality Visual Communication based on IMS
JF  - Mobilkommunikation : Technologien und Anwendungen ; Vorträge der 16. ITG-Fachtagung vom 18. bis 19. Mai 2011 in Osnabrück / Veranst.: Informationstechnische Gesellschaft im VDE (ITG) ... Tagungsleitung: Ralf Tönjes. Programmkomitee/Hrsg.: Peter Roer
Y1  - 2011
SN  - 978-3-8007-3352-1
N1  - ITG-Fachbericht ; 230 ; Fachtagung Mobilkommunikation <16, 2011, Osnabrück>
SP  - 80
EP  - 85
PB  - VDE-Verl.
CY  - Berlin
ER  - 
TY  - CHAP
A1  - Schiffer, Stefan
A1  - Ferrein, Alexander
A1  - Lakemeyer, Gerhard
T1  - Fuzzy representations and control for domestic service robots in Golog
T2  - Intelligent robotics and applications : 4th International conference, ICIRA 2011, Aachen, Germany, December 6-8, 2011, proceedings, part I. (Lecture notes in computer science ; 7102)
Y1  - 2011
SN  - 978-3-642-25486-4
SP  - 241
EP  - 250
ER  - 
TY  - JOUR
A1  - Maus, Stefan
A1  - Höfken, Hans-Wilhelm
A1  - Schuba, Marko
T1  - Forensic Analysis of Geodata in Android Smartphones
Y1  - 2011
N1  - Cyberforensics 2011, Glasgow
SP  - 1
EP  - 11
ER  - 
TY  - CHAP
A1  - Usai, Pierpaolo
A1  - Corucci, Alessandro
A1  - Gligorevic, Snjezana
A1  - Monorchio, Agostino
T1  - Estimation of airport surface propagation channel: ray tracing model and measurements
T2  - Proceedings of the 5th European Conference on Antennas and Propagation (EUCAP) : 11 - 15 April 2011, Rome, Italy
Y1  - 2011
SN  - 978-1-4577-0250-1
SP  - 1634
EP  - 1638
ER  - 
TY  - JOUR
A1  - Prochnow, Nora
A1  - Gebing, Tina
A1  - Ladage, Kerstin
A1  - Krause-Finkeldey, Dorothee
A1  - Ourdi, Abessamad El
A1  - Bitz, Andreas
A1  - Streckert, Joachim
A1  - Hansen, Volkert
A1  - Dermietzel, Rolf
T1  - Electromagnetic field effect or simply stress? Effects of UMTS exposure on hippocampal longterm plasticity in the context of procedure related hormone release
JF  - PLoS one
N2  - Harmful effects of electromagnetic fields (EMF) on cognitive and behavioural features of humans and rodents have been controversially discussed and raised persistent concern about adverse effects of EMF on general brain functions. In the present study we applied radio-frequency (RF) signals of the Universal Mobile Telecommunications System (UMTS) to full brain exposed male Wistar rats in order to elaborate putative influences on stress hormone release (corticosteron; CORT and adrenocorticotropic hormone; ACTH) and on hippocampal derived synaptic long-term plasticity (LTP) and depression (LTD) as electrophysiological hallmarks for memory storage and memory consolidation. Exposure was computer controlled providing blind conditions. Nominal brain-averaged specific absorption rates (SAR) as a measure of applied mass-related dissipated RF power were 0, 2, and 10 W/kg over a period of 120 min. Comparison of cage exposed animals revealed, regardless of EMF exposure, significantly increased CORT and ACTH levels which corresponded with generally decreased field potential slopes and amplitudes in hippocampal LTP and LTD. Animals following SAR exposure of 2 W/kg (averaged over the whole brain of 2.3 g tissue mass) did not differ from the sham-exposed group in LTP and LTD experiments. In contrast, a significant reduction in LTP and LTD was observed at the high power rate of SAR (10 W/kg). The results demonstrate that a rate of 2 W/kg displays no adverse impact on LTP and LTD, while 10 W/kg leads to significant effects on the electrophysiological parameters, which can be clearly distinguished from the stress derived background. Our findings suggest that UMTS exposure with SAR in the range of 2 W/kg is not harmful to critical markers for memory storage and memory consolidation, however, an influence of UMTS at high energy absorption rates (10 W/kg) cannot be excluded.
Y1  - 2011
U6  - http://dx.doi.org/10.1371/journal.pone.0019437
VL  - 6
IS  - 5
PB  - PLOS
CY  - San Francisco
ER  -