Refine
Year of publication
Document Type
- Conference Proceeding (303) (remove)
Conference Type
- Konferenzartikel (212)
- Konferenz-Abstract (61)
- Sonstiges (21)
- Konferenz-Poster (8)
- Konferenzband (1)
Language
- English (303) (remove)
Keywords
- RoboCup (20)
- Kommunikation (7)
- Eingebettetes System (5)
- Applikation (4)
- Brennstoffzelle (4)
- CST (4)
- Energieversorgung (4)
- HF-Ablation (4)
- Herzkrankheit (4)
- Sensortechnik (4)
- Batterie (3)
- Couplings (3)
- Design automation (3)
- Haustechnik (3)
- Katheter (3)
- Leistungselektronik (3)
- Messtechnik (3)
- Messung (3)
- Mobile Learning (3)
- Optik (3)
- Roboter (3)
- Signaltechnik (3)
- 5G mobile communication (2)
- Abtragung (2)
- Access protocols (2)
- Android (2)
- CRT (2)
- Decoding (2)
- Defibrillator (2)
- Elektrofahrzeug (2)
- Elektrokardiogramm (2)
- FETs (2)
- Finite difference methods (2)
- Frequency (2)
- Gehirn (2)
- Herzschrittmacher (2)
- Integrated circuit interconnections (2)
- Internet der Dinge (2)
- Microwave devices (2)
- Multiuser detection (2)
- Netzwerk (2)
- Payloads (2)
- Physical layer (2)
- Radiologie (2)
- Semiconductor device packaging (2)
- Sicherheit (2)
- Transceivers (2)
- access protocols (2)
- content adaptation (2)
- decoding (2)
- device independent learning (2)
- e-learning (2)
- machine learning (2)
- network coding (2)
- standardization (2)
- virtual reality (2)
- 3D User Interface (1)
- 3D displays (1)
- 3D modeling (1)
- 3D printing (1)
- 3D virtual reality (1)
- 6LoWPAN (1)
- Abbreviate Injury Scale (1)
- Absatz (1)
- Accident Analysis (1)
- Advanced Driver Assistance System (1)
- Air Traffic Control (1)
- Aircraft (1)
- Akustik (1)
- Algorithmus (1)
- Analytical Query (1)
- Atrial fibrillation (1)
- Atrioventricular delay (1)
- Attenuation (1)
- Austausch (1)
- Automation (1)
- Automotive engineering (1)
- BLE (1)
- Beschichtung (1)
- Bestrahlung (1)
- Bildverarbeitung (1)
- Biomedizin (1)
- Biventricular pacing (1)
- Blended Learning (1)
- Boiler (1)
- Breitbandkommunikation (1)
- Bussystem (1)
- Car-2-Car communication (1)
- Car-2-X communication (1)
- Car-to-Car-(C2C)-Communication (1)
- Cardiac resynchronization therapy (1)
- Cascading Style Sheets (1)
- Cheer and Challenge (1)
- Closed-form solution (1)
- Cloud computing (1)
- Coatings (1)
- Codierung (1)
- Collaborative learning (1)
- Collision Point (1)
- Communication networks (1)
- Computersicherheit (1)
- Computerunterstützte Kommunikation (1)
- Controlling (1)
- Couplers (1)
- Cyber Physical Systems, (1)
- DDS (1)
- DVB-T (1)
- Data Distribution Service (1)
- Data communications (1)
- Data mining (1)
- Data modeling (1)
- Databases (1)
- Datenbank (1)
- Datenmanagement (1)
- Datensicherung (1)
- Design (1)
- Device independency (1)
- Diesel-Ethanol-Mischkraftstoff (1)
- Differential equations (1)
- Downlink (1)
- Drahtloses lokales Netz (1)
- Durchblutung (1)
- E-Learning (1)
- Electromagnetic compatibility (1)
- Electronic Commerce (1)
- Elektrochemie (1)
- Elektrode (1)
- Elektronik (1)
- Embedded Software (1)
- Emission (1)
- Energieverbrauch (1)
- Energy storage (1)
- Enhanced Security (1)
- Equivalent circuits (1)
- Erweitere Realität (1)
- Eye tracking (1)
- Eöelktrokardiogramm (1)
- FT-Raman-Spektroskopie (1)
- Fahrzeug (1)
- Filter Dimension (1)
- Filters (1)
- Finite-Differenzen-Methode (1)
- Finite-Elemente-Methode (1)
- Flashcards (1)
- Flugregelung (1)
- Flugzeugsteuerwerk (1)
- Fotovoltaik (1)
- Fractionated atrial signals (1)
- Fractionated ventricular signals (1)
- Funktechnik (1)
- GPU computing (1)
- Gefäßverschluß (1)
- Gewebe (1)
- Glasfaserkabel (1)
- Glasfaseroptik (1)
- Gratings (1)
- Gyroskop (1)
- Hash Function (1)
- Hash Table (1)
- Herz (1)
- Herzmuskelkrankheit (1)
- Herzrhythmusstörung (1)
- Hochfrequenztechnik (1)
- Hubschrauber (1)
- Humanoid Robots (1)
- Humanoider Roboter (1)
- Höhensensor (1)
- IEEE802.11p/WAVE (1)
- IVD (1)
- Implementation (1)
- In-flight entertainment (1)
- Industrie 4.0 (1)
- Informatik (1)
- Informationssystem (1)
- Informationsvermittlung (1)
- Ingenieurwissenschaften (1)
- Intelligentes Stromnetz (1)
- Interferometrie (1)
- Internet Overlay networks (1)
- Internet of Things (1)
- Joining processes (1)
- Kabel (1)
- Kalibrieren (1)
- Kalibrierung (1)
- Kamera (1)
- Karbon (1)
- Kardiale Resynchronisationstherapie (1)
- Kernspintomografie (1)
- Kinetik (1)
- Knowledge sharing (1)
- Konferenz (1)
- Kontrolltheorie (1)
- Kraftstoff (1)
- Kraftwerk (1)
- Kryoptologie (1)
- Kupplung (1)
- Language acquisition (1)
- Language learning (1)
- Left atrial ECG (1)
- Left atrial delay (1)
- Left cardiac ECG (1)
- Leistung (1)
- Lichtdispersion (1)
- Lärmschutz (1)
- M-learning (1)
- MEMS (1)
- Machine Learning (1)
- Machine-to- Machine-(M2M)-Communication (1)
- Many-core architectures (1)
- Mechanik (1)
- Medizin (1)
- Medizintechnik (1)
- Membran (1)
- Methanol (1)
- Microelectronics (1)
- Microgrid (1)
- Microwave integrated circuits (1)
- Microwave integrated circuits Equivalent circuits (1)
- Mikrowellentechnik (1)
- Mobile Computing (1)
- Mobile device (1)
- Mobile devices (1)
- Mobilkommunikation (1)
- Modell (1)
- Modellhubschrauber (1)
- Monitoring (1)
- Monomodefaser (1)
- Multi-core architectures (1)
- Nachtsichtgerät (1)
- Network topology (1)
- Nickel (1)
- Niedrige Energie (1)
- Oberfläche (1)
- Online Student Services (1)
- Oxidation (1)
- Partikel (1)
- Peer to peer computing (1)
- Photonik (1)
- Photovoltaik (1)
- Physik (1)
- Planung (1)
- Produktion (1)
- Propagation losses (1)
- Qualitätskontrolle (1)
- Qualitätssicherung (1)
- Rahmen (1)
- Rails (1)
- Raman-Spektroskopie (1)
- Rede (1)
- Robotic Soccer (1)
- Routing (1)
- Schleudertrauma (1)
- Schrittmacher (1)
- Security (1)
- Segmentierung (1)
- Sensortechniik (1)
- Sicherheitstechnik (1)
- Signal averaging ECG (1)
- Simulation (1)
- Smart Grid (1)
- Smart grids (1)
- Software-Engineering (1)
- Software-Qualitätssicherung (1)
- Software-Sicherheit (1)
- Software-Testautomatisierung (1)
- Software-Tool (1)
- Spectral-temporal mapping (1)
- Speiseröhre (1)
- Spektralanalyse (1)
- Spektroskopie (1)
- Steuerung (1)
- Strahl (1)
- Student activities (1)
- Studienanfänger (1)
- Studium (1)
- Subspace clustering (1)
- Synchronisation (1)
- Synchronisierung (1)
- System (1)
- TLS (1)
- TTCN3 (1)
- Target Path (1)
- Target Vehicle (1)
- Technik (1)
- Telemetrie (1)
- Testumgebung (1)
- TinyOS (1)
- Transducers (1)
- Transesophageal electrocardiography (1)
- Transistor (1)
- Trägheit (1)
- Ultraweitband (1)
- Umwelt (1)
- User generated content (1)
- User interface (1)
- VANETs (1)
- VR (1)
- VRU eSafety (1)
- Vehicle safety (1)
- Ventricular tachycardia (1)
- Versorgung (1)
- Verwaltung (1)
- Virtual private networks (1)
- Virtual reality (1)
- Virtuelle Realität (1)
- Wasser (1)
- Wasserstand (1)
- Welle (1)
- Wireless M-Bus (1)
- Wärmepumpe (1)
- Zelle (1)
- accelerometer (1)
- ad hoc networks (1)
- car-to-car communication (1)
- cloud (1)
- cluster (1)
- collaborative learning (1)
- content formatting (1)
- content synchronization (1)
- data replication (1)
- device detection (1)
- device independency (1)
- distributed systems (1)
- e-Mobilität (1)
- eingebettete Datenverarbeitung (1)
- emulation (1)
- energy harvesting (1)
- flashcard (1)
- generalized content (1)
- genetic algorithms (1)
- guided waves (1)
- gyroscope (1)
- high performance (1)
- humanoid robot walking (1)
- inertial measurement unit (1)
- inertiales Navigationssystem (1)
- inter-vehicle communication (1)
- intra-vehicle communication (1)
- kabellos (1)
- kanal (1)
- language learning (1)
- localization (1)
- low power wireless (1)
- m-learning (1)
- middleware (1)
- mikroelektromechanisches System (1)
- mild traumatic brain injury (1)
- mobile learning (1)
- mobile web design guidelines (1)
- model driven design (1)
- multidimensional flashcard (1)
- performance analysis (1)
- performance evaluation (1)
- railways (1)
- real time (1)
- remote laboratory (1)
- secondary surveillance radar (1)
- signal averaging (1)
- smart grid (1)
- smart metering (1)
- subsystem design (1)
- temperature dependency (1)
- vehicular networks (1)
- wavelet transformation (1)
- wireless access networks (1)
- wireless comunication (1)
- wireless sensor (1)
- wireless sensor networks (1)
- wireless vehicular network (1)
- Ökologie (1)
- Überwachung (1)
Institute
- Fakultät Elektrotechnik und Informationstechnik (E+I) (bis 03/2019) (303) (remove)
Open Access
- Closed Access (136)
- Open Access (110)
- Closed (51)
- Bronze (40)
- Diamond (1)
Home Care Applications and Ambient Assisted Living become increasingly attractive. This is caused as well by market pull, as the number of elderly people grows monotonously, as well as by technology push, as technological advances and attractive products pave the way to economically advantageous offerings. However, in real-life applications, a significant number of challenges remain. Those include seamless communication between products from different supplier, due to the lack of sufficiently standardized solutions, energy budgets, and scalability of solutions. This paper presents the experience from the InCASA project (Integrated Network for Completely Assisted Senior Citizen's Autonomy), where architectures for heterogeneous physical and logical communication flows are examined.
A novel approach of a test environment for embedded networking nodes has been conceptualized and implemented. Its basis is the use of virtual nodes in a PC environment, where each node executes the original embedded code. Different nodes run in parallel, connected via so-called virtual channels. The environment allows to modifying the behavior of the virtual channels as well as the overall topology during runtime to virtualize real-life networking scenarios. The presented approach is very efficient and allows a simple description of test cases without the need of a network simulator. Furthermore, it speeds up the process of developing new features as well as it supports the identification of bugs in wireless communication stacks. In combination with powerful test execution systems, it is possible to create a continuous development and integration flow.
Nowadays the processing power of mobile phones, Smart phones and PDA is increasing, as well as the transmission bandwidth. Nevertheless there is still the need to reduce the content and the need of processing the data. Proposals and solutions for dynamic reduction of the transmitted content will be discussed. For that, device specific properties will be taken into account, aiming at reducing the need of processing power at the client side to display the 3D Virtual Reality data. Therefore, well known technologies like data compression are combined with new approaches to achieve the goal of adaptive content transmission. For device dependant reduction of processing power the data has to be pre-processed at the server side or the server itself has to take over functionality of weak mobile devices.
Cardiac resynchronization therapy is an established therapy for heart failure patients with sinus rhythm, reduced left ventricular ejection fraction and prolongation of QRS duration. The aim of the study was to evaluate ventricular desynchronization with electrical interventricular delay (IVD) to left ventricular delay (LVD) ratio in atrial fibrillation heart failure patients. IVD and LVD were measured by transesophageal posterior left ventricular ECG recording. In atrial fibrillation heart failure patients with prolonged QRS duration, the mean IVD-to-LVD-ratio was 0.84 +/- 0.42 with a range from 0.17 to 2.2 IVD-to-LVD-ratio. IVD-to-LVD-ratio correlated with QRS duration. IVD-to-LVD-ratio may be a useful parameter to evaluate electrical ventricular desynchronization in atrial fibrillation heart failure patients.
The application of leaky feeder (radiating) cables is a common solution for the implementation of reliable radio communication in huge industrial buildings, tunnels and mining environment. This paper explores the possibilities of leaky feeders for 1D and 2D localization in wireless systems based on time of flight chirp spread spectrum technologies. The main focus of this paper is to present and analyse the results of time of flight and received signal strength measurements with leaky feeders in indoor and outdoor conditions. The authors carried out experiments to compare ranging accuracy and radio coverage area for a point-like monopole antenna and for a leaky feeder acting as a distributed antenna. In all experiments RealTrac equipment based on nanoLOC radio standard was used. The estimation of the most probable path of a chirp signal going through a leaky feeder was calculated using the ray tracing approach. The typical non-line-of-sight errors profiles are presented. The results show the possibility to use radiating cables in real time location technologies based on time-of-flight method.
Introduction: Cardiac resynchronization therapy (CRT) with biventricular pacing (BV) is an established therapy for heart failure (HF) patients (P) with ventricular desynchronisation, but not all patients improved clinically. Aim of this study was to evaluate electrical intra-left ventricular conduction delay (LVCD) and interventricular conduction delay (IVCD), to better select patients for CRT.
Methods: 65 HF patients (age 63.4 ± 10.6 years; 7 females, 58 males) with New York Heart Association (NYHA) class 3 ± 0.2, 24.4 ± 6.7 % left ventricular (LV) ejection fraction and 167.4 ± 35.6 ms QRSD were included. Esophageal TO Osypka focused hemispherical electrodes catheter was perorally applied in position of maximum LV deflection to measure LVCD between onset and offset of LV deflection and IVCD between earliest onset of QRS in the 12-channel surface ECG and onset of LV deflection in the focused bipolar transesophageal LV electrogram.
Results: There were 50 responders with LVCD of 76.5 ± 20.4 ms, IVCD of 80.5 ± 26.1 ms (P=0.34) and QRSD of 171 ± 37.7 ms. 15 non-responders had longer LVCD of 90 ± 28.5 ms (P = 0.045), shorter IVCD of 50.1 ± 29.1 ms (P < 0.001) and QRSD of 155.3 ± 25 ms (P=0.14). During 21.3 ± 20.3 month BV pacing follow-up, the responder`s NYHA classes improved from 3 ± 0.2 to 2. ± 0.3 (P < 0.001) whereas the non-responders NYHA classes did not improve from 3 ± 0.2 to 2.9 ± 0.3 (P = 0.43) during 15.7 ± 13.9 month BV pacing follow-up (53 Boston, 10 Medtronic and 2 St. Jude CRT devices).
Conclusion: Determination of electrical LVCD and IVCD by focused bipolar transesophageal LV electrogram recording may be an additional useful technique to improve patient selection for CRT.
In this work, we consider a duty-cycled wireless sensor network with the assumption that the on/off schedules are uncoordinated. In such networks, as all nodes may not be awake during the transmission of time synchronization messages, nodes will require to re-transmit the synchronization messages. Ideally a node should re-transmit for the maximum sleep duration to ensure that all nodes are synchronized. However, such a proposition will immensely increase the energy consumption of the nodes. Such a situation demands that there is an upper bound of the number of retransmissions. We refer to the time a node spends in re-transmission of the control message as broadcast duration. We ask the question, what should be the broadcast duration to ensure that a certain percentage of the available nodes are synchronized. The problem to estimate the broadcast duration is formulated so as to capture the probability threshold of the nodes being synchronized. Results show the proposed analytical model can predict the broadcast duration with a given lower error margin under real world conditions, thus demonstrating the efficiency of our solution.
In this paper we propose a motion framework forbipedal robots that decouples motion definitions from stabilizingthe robot. This simplifies motion definitions yet allows dynamicmotion adaptations. Two applications, walking and stopping onone leg, demonstrate the power of the framework. We show thatour framework is able to perform walking and stopping on one legeven under extreme conditions and improves walking benchmarkssignificantly in the RoboCup 3D soccer simulation domain.
Transthoracic impedance cardiography (ICG) is a non-invasive method for determination of hemodynamic parameters. The basic principle of transthoracic ICG is the measurement of electrical conductivity of the thorax over the time. The aim of the study was the analysis of hemodynamic parameters from healthy individuals and the evaluation of various hemodynamic monitoring devices. Fourteen men (mean age 25 ± 4.59 years) and twelve women (mean age 24 ± 3.5 years) were measured during the cardiovascular engineering laboratory at Offenburg University of Applied Sciences, Offenburg, Germany. The ICG recordings were measured with the devices CardioScreen 1000, CardioScreen 2000 and TensoScreen with the corresponding Software Cardiovascular Lab 2.5 (Medis Medizinische Messtechnik GmbH, Illmenau, Germany). In order to create identical frame conditions, all measurements were recorded in the same position and for the same duration. Various positions were simulated from horizontal lying position to vertical standing position. Altogether, more than 30 hemodynamic parameters were measured.
Introduction: Cardiac resynchronization therapy (CRT) with biventricular pacing is an established therapy for heart failure (HF) patients with sinus rhythm and ventricular desynchronisation. The aim of this study was to evaluate interventricular conduction delay (IVCD) and interatrial conduction delay (IACD) before and after premature ventricular contractions (PVC) in HF patients.
Methods: 13 HF patients (age 68 ± 10 years; 2 females, 11 males) with New York Heart Association functional class 2,8 ± 0.5, left ventricular (LV) ejection fraction 28,6 ± 12,6 %, 154 ± 25 ms QRS duration and PVC were analysed with bipolar transesophageal LV and left atrial electrogram recording and National Instruments LabView 2009 software. The level of significance of the t-test is 0,005.
Results: QRS duration increases during PVC (188 ± 32 ms) in comparison to the beat before (154 ± 25 ms, P = ) and after PVC (152 ± 25 ms,). IVCD increases during PVC up to 65 ± 33 ms (51 ± 19 ms in the beat before PVC, P=0.18, 49 ± 19 ms after PVC, P = 0.12). Intra-LV delay of 90 ± 16 ms is not different in the beat before PVC, 90 ± 14 ms during PVC (P = 0.99) and 94 ± 16 ms in the beat after PVC (P = 0.38). IACD is not significantly PVC influenced (67 ± 12 ms before PVC and 65 ± 13 ms after PVC, P = 0.71). Intra-left atrial conduction delay is not significant longer during PVC (57 ± 28 ms) than in the beat before PVC (54 ± 13 ms, P = 0.51) or after PVC (54 ± 8 ms, P = 0.45). PQ duration increases significantly after PVC (224 ± 95 ms) in comparison to the beat before PVC (176± 29 ms, P =...).
Conclusion: Transesophageal left cardiac electrocardiography with LabView 2009 software can improve evaluation of IVCD and IACD before, during and after PVC in HF patient selection for CRT.
The CAN bus still is an important fieldbus in various domains, e.g. for in-car communication or automation applications. To counter security threats and concerns in such scenarios we design, implement, and evaluate the use of an end-to-end security concept based on the Transport Layer Security protocol. It is used to establish authenticated, integrity-checked, and confidential communication channels between field devices connected via CAN. Our performance measurements show that it is possible to use TLS at least for non time-critical applications, as well as for generic embedded networks.
Wireless communication systems more and more become part of our daily live. Especially with the Internet of Things (IoT) the overall connectivity increases rapidly since everyday objects become part of the global network. For this purpose several new wireless protocols have arisen, whereas 6LoWPAN (IPv6 over Low power Wireless Personal Area Networks) can be seen as one of the most important protocols within this sector. Originally designed on top of the IEEE802.15.4 standard it is a subject to various adaptions that will allow to use 6LoWPAN over different technologies; e.g. DECT Ultra Low Energy (ULE). Although this high connectivity offers a lot of new possibilities, there are several requirements and pitfalls coming along with such new systems. With an increasing number of connected devices the interoperability between different providers is one of the biggest challenges, which makes it necessary to verify the functionality and stability of the devices and the network. Therefore testing becomes one of the key components that decides on success or failure of such a system. Although there are several protocol implementations commonly available; e.g., for IoT based systems, there is still a lack of according tools and environments as well as for functional and conformance testing. This article describes the architecture and functioning of the proposed test framework based on Testing and Test Control Notation Version 3 (TTCN-3) for 6LoWPAN over ULE networks.
Temperature regulation is an important component for modern high performance single -core and multi-core processors. Especially high operating frequencies and architectures with an increasing number of monolithically integrated transistors result in a high power dissipation and - since processor chips convert the consumed electrical energy into thermal energy - in high operating temperatures. High operating temperatures of processors can have drastic consequences regarding chip reliability, processor performance, and leakage currents. External components like fans or heat spreaders can help to reduce the processor temperature - with the disadvantage of additional costs and reduced reliability. Therefore, software based algorithms for dynamic temperature management are an attractive alternative and well known as Dynamic Thermal Management (DTM). However, the existing approaches for DTM are not taking into account the requirements of real-time embedded computing, which is the objective in the given project. The first steps are the profiling and the thermal modeling of the system, which is reported in this paper for a Freescale i. MX6Q quad-core microprocessor. An analytical model is developed and verified by an extensive set of measurement runs.
This paper describes the Sweaty II humanoid adult size robot trying to qualify for the RoboCup 2018 adult size humanoid competition. Sweaty came 2nd in RoboCup 2017 adult size league. The main characteristics of Sweaty are described in the Team Description Paper 2017. The improvements that have been made or are planned to be implemented for RoboCup 2018 are described in this paper.
This paper describes the Sweaty II humanoid adult size robot trying to qualify for the RoboCup 2017 adult size humanoid competition. Sweaty came 2nd in RoboCup 2016 adult size league. The paper describes the main characteristics of Sweaty that made this success possible, and improvements that have been made or are planned to be implemented for RoboCup 2017.