Daeyoung Kim

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—RF modulated backscatter (RFMB), also known as modulated radar cross section or sigma modulation, is a RF transmission technique useful for short-range, low-data-rate applications, such as nonstop toll collection, electronic shelf tags, freight container identification and chassis identification in automobile manufacturing, that are constrained to have(More)
A new multi-antenna or multiple-input-multiple-output (MIMO) configuration is introduced for RF modulated backscatter in a multipath environment. RF modulated backscatter is used by semipassive RF tags to transmit without a power amplifier, and is therefore appropriate for applications with extreme power constraints such as sensor communications, electronic(More)
Absrract-Modulated backscatter is a RF transmission technique useful for short-range, low-data-rate applications constrained to have extremely low power requirements, such as electronic shelf tags, RF tags, and some sensor applications. The small-scale fading observed on the backscattered signal has deeper fades than a signal from a traditional one-way link(More)
TolC and its homologous family of proteins are outer membrane factors that are essential for exporting small molecules and toxins across the outer membrane in Gram-negative bacteria. Two open reading frames in the Vibrio vulnificus genome that encode proteins homologous to Escherichia coli TolC, designated TolCV1 and TolCV2, have 51.3% and 29.6% amino acid(More)
  • Kuo-Hui Li, N I bullet A I G, E bullet, O F bullet T E C H N O L O G, Y bullet, P R O G R Ess S E R V I C E +20 others
  • 2004
Date approved by Chairman To my parents Acknowledgments I would like to beginby extending my most sincere thanks to my advisor Professor Mary Ann Ingram for her invaluable guidance, inspiration, suggestions, support, and patience throughout this work. Also, I would like to thank those who served on my dissertation defense committee: and other Taiwanese(More)
RNase E plays an important role in the degradation and processing of RNA in Escherichia coli. The enzymatic activity of RNase E is controlled by the protein inhibitors RraA and RraB. The marine pathogenic bacterium Vibrio vulnificus also contains homologs of RNase E and RraA, designated as RNase EV, RraAV1, and RraAV2. Here, we report that RraAV1 actively(More)
While identifying genes regulated by ribonuclease III (RNase III) in Escherichia coli, we observed that steady-state levels of betT mRNA, which encodes a transporter mediating the influx of choline, are dependent on cellular concentrations of RNase III. In the present study, we also observed that steady-state levels of betT mRNA are dependent on RNase III(More)
RraA is a protein inhibitor of RNase E (Rne), which catalyzes the endoribonucleolytic cleavage of a large proportion of RNAs in Escherichia coli. The antibiotic-producing bacterium Streptomyces coelicolor also contains homologs of RNase E and RraA, designated as RNase ES (Rns), RraAS1, and RraAS2, respectively. Here, we report that RraAS2 requires both(More)
In the title compound, C19H19NO5, the amide carbonyl O atom is positioned anti to the other two carbonyl O atoms. The 4-hy-droxy-hydro-cinnamate fragment is disordered over two positions with an occupancy ratio of 0.729 (12):0.271 (12). The N-(C=O)-C plane of the acetamide group and the acetate O-(C=O)-C plane are almost co-planar; the acetamide plane makes(More)
In the title complex, {[Ag(C13H13N5)]NO3} n , the Ag(I) atom is coordinated by three N atoms from two bidentate/monodentate pyrazolylpyridyl ligands to form a distorted trigonal-planar geometry [range of angles: 83.34 (6) (chelate ring) to 139.15 (7) °]. The chelate ring has a distorted boat conformation. The dihedral angle between the pyridyl ring and the(More)