TY - JOUR AU - Irion, Thomas AU - Eickelmann, Birgit ID - 28724 IS - 7 JF - Zeitschrift Grundschule TI - Digitale Bildung in der Grundschule: 7 Handlungsansätze. Basisartikel ER - TY - JOUR AU - Eickelmann, Birgit ID - 28725 IS - 4 JF - SchulVerwaltung Spezial TI - Digitalisierung an Schulen. Eine Bestandsaufnahme VL - 20 ER - TY - JOUR AU - Eickelmann, Birgit ID - 28726 IS - 2 JF - Zeitschrift für Bildungsverwaltung TI - Schulen und Lehrerbildung in der digitalen Welt – Thesen zwischen Hype und Zukunftsfähigkeit VL - 29 ER - TY - BOOK AU - Cress, Ulrike AU - Diethelm, Ira AU - Eickelmann, Birgit AU - Köller, Olaf AU - Nickolaus, Reinhold AU - Pant, Hans Anand AU - Reiss, Kristina ID - 28727 TI - Schule in der digitalen Transformation. Perspektiven der Bildungswissenschaften ER - TY - BOOK AU - Gerick, Julia AU - Vennemann, Mario AU - Eickelmann, Birgit AU - Bos, Wilfried AU - Mews, Sina ID - 28729 TI - ICILS 2013 – Dokumentation der Erhebungsinstrumente der International Computer and Information Literacy Study ER - TY - JOUR AU - Eickelmann, Birgit AU - Drossel, Kerstin ID - 28730 JF - SchulVerwaltung NRW TI - Digitale Medien in TIMSS 2015 und IGLU 2016. Ergebnisse zur Nutzung und zum Stellenwert von Lehrerfortbildungen für Grundschulen in Deutschland im internationalen Vergleich ER - TY - JOUR AU - Eickelmann, Birgit ID - 28731 IS - 5 JF - SchulVerwaltung Spezial TI - Schulisches Lernen und Lehren in der digitalen Gesellschaft. Schule und Unterricht zukunftsfähig gestalten VL - 20 ER - TY - CONF AU - Urbanek, Stefan AU - Ponick, Bernd AU - Taube, Alexander AU - Hoyer, Kay-Peter AU - Schaper, Mirko AU - Lammers, Stefan AU - Lieneke, Tobias AU - Zimmer, Detmar ID - 24105 T2 - 2018 IEEE Transportation Electrification Conference and Expo (ITEC) TI - Additive Manufacturing of a Soft Magnetic Rotor Active Part and Shaft for a Permanent Magnet Synchronous Machine ER - TY - GEN ED - Eiber, Marion ED - Richard, Hans Albert ID - 24115 TI - Einfluss unterschiedlicher Pulvereigenschaften beim selektiven Laserstrahlschmelzen von TiAl6V4 auf die Werkstoffeigenschaften ER - TY - GEN ED - Eiber, Marion ED - Richard, Hans Albert ID - 24116 TI - Metallische Legierungssysteme für die additive Fertigung belastungsangepasster Implantate ER - TY - JOUR AU - Inguva, Venkatesh AU - Kathuria, Sagar V. AU - Bilsel, Osman AU - Perot, Blair James ED - Dao, Ming ID - 24121 JF - PLOS ONE SN - 1932-6203 TI - Computer design of microfluidic mixers for protein/RNA folding studies ER - TY - JOUR AU - Bader, Shujaut H. AU - Inguva, Venkatesh AU - Perot, J. B. ID - 24123 JF - Wind Energy SN - 1095-4244 TI - Improving the efficiency of wind farms via wake manipulation ER - TY - JOUR AU - Inguva, Venkatesh AU - Rothstein, Jonathan P. AU - Bilsel, Osman AU - Perot, Blair J. ID - 24124 JF - Experiments in Fluids SN - 0723-4864 TI - High-speed velocimetry in microfluidic protein mixers using confocal fluorescence decay microscopy ER - TY - JOUR AU - Ramaswamy, Arunselvan AU - Bhatnagar, Shalabh ID - 24150 IS - 6 JF - IEEE Transactions on Automatic Control TI - Stability of stochastic approximations with “controlled markov” noise and temporal difference learning VL - 64 ER - TY - JOUR AU - Demirel, Burak AU - Ramaswamy, Arunselvan AU - Quevedo, Daniel E AU - Karl, Holger ID - 24151 IS - 4 JF - IEEE Control Systems Letters TI - Deepcas: A deep reinforcement learning algorithm for control-aware scheduling VL - 2 ER - TY - CONF AB - In this poster, we present the first experimental results of our OFDM-based Vehicular VLC (V-VLC) prototype. Our Bit Error Rate (BER) measurements show that for lower Modulation and Coding Schemes (MCS), the performance of our hardware-setup roughly behaves the same as it does in simulation for AWGN channel. However, for higher order MCS with high PAPR, the BER performance gets degraded due to non-linear behavior of LEDs, and deviates further from AWGN performance as the MCS order is increased. The obtained results suggest that unlike RF-Communications, where the focus is usually towards linearity of the amplifiers, for V-VLC, linearity within the whole system is required to achieve optimal performance. AU - Koepe, Jörn AU - Kaltschmidt, Christian AU - Illian, Marvin AU - Puknat, Robert AU - Kneuper, Pascal AU - Wittemeier, Steffen AU - Memedi, Agon AU - Tebruegge, Claas AU - Amjad, Muhammad Sohaib AU - Kruse, Stephan AU - Kress, Christian AU - Scheytt, Christoph AU - Dressler, Falko ID - 24185 T2 - 2018 IEEE Vehicular Networking Conference (VNC) TI - First Performance Insights on Our Noval OFDM-based Vehicular VLC Prototype ER - TY - CONF AB - A 2nd transconductance subharmonic receiver for 245 GHz spectroscopy sensor applications has been proposed. The receiver consists of a 245 GHz on-chip folded dipole antenna, a CB (common base) LNA, a 2nd transconductance SHM (subharmonic mixer), and a 120 GHz push-push VCO with 1/64 divider. The receiver is fabricated in fT/fmax = 300/500 GHz SiGe:C BiCMOS technology. The receiver dissipates a low power of 288 mW. Integrated with the on-chip antenna, the receiver is measured on-chip with a conversion gain of 15 dB, a bandwidth of 15 GHz, and the chip will be utilized in PCB board design for gas spectroscopy sensor application. AU - Mao, Yanfei AU - Shiju, E. AU - Schmalz, Klaus AU - Scheytt, Christoph ID - 24186 T2 - Journal of Semiconductors TI - 245 GHz Subharmonic Receiver With Onchip Antenna for Gas Spectroscopy Application ER - TY - CONF AB - We present a transmitter circuit to drive a commercial Light Emitting Diode (LED)-based headlight for automotive Visible Light Communication (VLC). Based on the design of the presented transmitter (TX), we provide a design methodology for VLC TXs and make it available as Open Hardware. Furthermore, a complete wireless VLC link is built using the GNU Radio signal processing tool chain and demonstrated on an Universal Software Radio Peripheral (USRP). The Total Harmonic Distortion (THD) of the system is below 5% for a wide input voltage range and the 1 dB compression point (P1dB) is at 1.02V, which makes the circuit attractive for more advanced modulation formates like Orthogonal Frequency Division Multiplexing (OFDM) or Pulse-Amplitude Modulation (PAM). AU - Kruse, Stephan AU - Kress, Christian AU - Memedi, Agon AU - Tebruegge, Claas AU - Amjad, Muhammad Sohaib AU - Scheytt, Christoph AU - Dressler, Falko ID - 24190 T2 - ANALOG 2018 16. GMM/ITG-Fachtagung TI - Design of an Automotive Visible Light Communications Link using a Off-The-Shelf LED Headlight ER - TY - CONF AB - The terahertz frequency range provides abundant bandwidth (25GHz ~ 50 GHz) to achieve ultra-high-speed wireless communication and enables data rates up to and above 100 Gbps. We choose Parallel Sequence Spread Spectrum (PSSS) as an analog friendly modulation and coding scheme that allows for an efficient mixed-signal implementation of a 100 Gbps wireless communication system. In our system design, we require a DAC (Digital to Analog converters) running at 1.67 G symbols/sec. The optimization of the bit resolution of this DAC will considerably reduce the hardware implementation efforts. In this work, we presented the analytical model for PSSS modulation and deduced a mathematical formula to calculate the number of discrete level amplitudes along with their probability distribution appearing at the output of the PSSS modulated signal. The analytical analysis assists in predicting the number of the quantization level of the DAC needed at the PSSS transmitter. The theoretical analysis shows that there are in total 225 discrete levels at the output of the PSSS encoder which leads to an 8-bit resolution of DAC. In this paper, we analyzed the variation of BER (Bit Error Rate) to the clipping of low probability amplitude levels and found that there is an only slight increase of the BER when we clip off the low probability amplitude levels. Thus, there is a tradeoff involved in a minor growth of BER concerning the reduction of the DAC bit resolution. Finally, we can reduce the DAC bit resolution from 8 bits to 7 bits and thus simplify the hardware implementation efforts of DAC operating at 1.67 Gbps. AU - Karthik, KrishneGowda AU - Wimmer, Lara AU - Javed, Abdul Rehman AU - Wolf, Andreas AU - Scheytt, Christoph AU - Kraemer, Rolf ID - 24192 T2 - 15th International Symposium on Wireless Communication Systems (ISWCS) TI - Analysis of PSSS modulation for optimization of DAC bit resolution for 100 Gbps systems ER - TY - CONF AB - A complete system analysis for an integrated passive RFID transponder designed at 5.8 GHz range is presented, and a comprehensive set of design concerns for the rectifier circuit as the core of the harvesting block is also discussed. The system analysis is complemented by transistor-level design and simulation of harvesting circuits in a commercial 65 nm CMOS technology. A differential drive rectifier (DDR) has been selected as the most efficient harvesting topology for microwave frequency applications, which works at very low input power levels. The circuit was designed and simulated including chip layout parasitics and antenna matching circuitry. Considering the power budget of the tag chip, a power conversion efficiency of roughly 68.4% is achieved in simulation for an input RF power of around -11.26dBm. AU - Haddadian, Sanaz AU - Scheytt, Christoph ID - 24193 T2 - Electromagnetics Research Symposium TI - Wireless Energy Harvesting in RFID Applications at 5.8 GHz ISM Band, a System Analysis VL - 40th ER -