5,173 research outputs found
Supplemental material for Ultrasonographic optic nerve sheath diameter to detect increased intracranial pressure in adults: a meta-analysis
No full textSupplemental material for Ultrasonographic optic nerve sheath diameter to detect increased intracranial pressure in adults: a meta-analysis by Sung-Eun Kim, Eun Pyo Hong, Heung Cheol Kim, Si Un Lee and Jin Pyeong Jeon in Acta Radiologica</p
Supplemental Material, supplementary_table_12_19 - Mortality and Prognostic Prediction in Very Elderly Patients With Severe Pneumonia
No full textSupplemental Material, supplementary_table_12_19 for Mortality and Prognostic Prediction in Very Elderly Patients With Severe Pneumonia by Moon Seong Baek, Sojung Park, Jeong-Hee Choi, Cheol-Hong Kim, and In Gyu Hyun in Journal of Intensive Care Medicine</p
Two Opposing Effects of Monovalent Cations on the Stability of i-Motif Structure
No full textAt acidic pH, cytosine-rich single-stranded DNA can be folded into a tetraplex structure called i-motif (iM). In recent studies, the effect of monovalent cations on the stability of iM structure has been addressed, but a consensus about the issue has not been reached yet. Thus, we investigated the effects of various factors on the stability of iM structure using fluorescence resonance energy transfer (FRET)-based analysis for three types of iM derived from human telomere sequences. We confirmed that the protonated cytosine-cytosine (C:C+) base pair is destabilized as the concentration of monovalent cations (Li+, Na+, K+) increases and that Li+ has the greatest tendency of destabilization. Intriguingly, monovalent cations would play an ambivalent role in iM formation by making single-stranded DNA flexible and pliant for an iM structure. In particular, we found that Li+ has a notably greater flexibilizing effect than Na(+ )and K+. All taken together, we conclude that the stability of iM structure is controlled by the subtle balance of the two counteractive effects of monovalent cations: electrostatic screening and disruption of cytosine base pairing. (GRAPHICS)11Nsciescopu
An optimal enforcement system for pollution control: monetary penalties and suspension orders
No full textWe analyzed an optimal enforcement system of monetary penalty and suspension order for social welfare maximization under a constraint of pollution control. We showed that when there is an asymmetrical information problem regarding firms’ pollution control efforts, both enforcement tools are generally needed. Taking as a benchmark a situation where firms voluntarily engage in pollution control activities, we found that when the profit level is high, the suspension order is more effective than the monetary penalty because the firms are eager to stay in business to earn high profit. On the other hand, if the profit level is low, the regulator must resort to a less severe suspension order, thereby lowering the number of firms fined
Recovery of surface plasmon loss in organic light-emitting diodes using a solution-vased scattering layer
No full textUse of spin-coated nanoparticles to enhance out-coupling efficiency of randomly nanostructured organic light-emitting diodes
No full textDesign and Analysis of 239 GHz CMOS Push-Push Transformer-Based VCO With High Efficiency and Wide Tuning Range
No full textA push-push transformer-based voltage-controlled oscillator (VCO) is proposed and analyzed to achieve high efficiency and a wide tuning range at sub-terahertz (THz) frequencies. Analyses show that the coupling factor of the transformer to obtain high output power (P-OUT) has to be carefully chosen by consideration of gate-to-drain voltage gain as well as matching impedances seen from the drain and to the gate of a VCO transistor at the 2nd harmonic frequency (2f(o)). Analysis also shows that the transformer-based resonator allows a wide tuning range. In addition, it has been shown that the introduction of a parallel inductor to a varactor leads to high P-OUT and low phase noise. The proposed 239 GHz VCO with a 65 nm CMOS process demonstrates the high efficiency of 1.45%, the P-OUT of -4.8 dBm, and the wide tuning range of 12.5% with a supply voltage of 1.2 V
A Miniaturized Low-Power Wireless Remote Environmental Monitoring System using Microfabricated Electrochemical Sensing Electrodes
No full textThis work has been supported by the Korea Science and
Engineering Foundation (KOSEF) through the MICROS
center at KAIST. The authors would like to thank
Myungsoo Kim for antenna design
A SiGeBiCMOS transmitter module for IMT2000 applications
No full textThis letter describes a Tx module for IMT2000 applications consisting of an up-conversion mixer and a variable-gain driver amplifier. The up-conversion mixer, based on the Gilbert active topology has a power gain of 4.8 dB and consumes 15-mA current from a 3-V supply. The variable-gain driver amplifier comprises a gain-controlled stage of the current steering structure and a common emitter stage, and has a variable-gain range of over 30 dB with 30.3-mA current consumption. The Tx module achieves a gain error of less than 1.2 dB over a 30-dB gain range, an output IP3 of 25 dBm, and an output P1 dB of 7.4 dBm at the maximum gain of 24.5 dB. It occupies 1.0 x 1.2 mm.This work was
supported in part by KOSEF under the ERC program through the MINT Research
Center, Dongguk University
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