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Novel Method for Accurate Extraction of fMAX for Nano-Scale MOSFETs
안정호,Dae-Byung Kim,임수,이희덕,박성형,이희승,강영석,김대병,이성헌 한국물리학회 2004 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.45 No.2
In this paper, a new method is proposed to extract accurately the fMAX (Maximum Frequency of Oscillation) for nano-scale CMOSFETs. In the method, we focus on the property that stability factor (K) and jS21 j/jS12 j (dB) can be simply expressed as a function of frequency. Then, the proposed method is applied to extract fMAX of nano-scale MOSFETs down to 80-nm gate length. Although the S-parameters are measured for the 30-GHz range, the fMAX at about 80 GHz is accurately extracted by using the proposed method. The advantage of the proposed method is that fMAX can be extracted accurately by using the S-parameter, which is measured in a much lower frequency range than fMAX.
Ethanol이 Allyl alcohol 독성에 미치는 영향
이주영,김대병,문창규,정진호,Lee, Joo-Young,Kim, Dae-Byung,Moon, Chang-Kiu,Chung, Jin-Ho 대한약학회 1994 약학회지 Vol.38 No.2
Ally alcohol is metabolized in the liver through two steps, first to reactive acrolein by alcohol dehydrogenase(ADH), subsequently to acrylic acid by aldehyde dehydrogenase(ALDH). Since ethanol could compete the same enzymes to be metabolized in the liver, we have studied the interaction between allyl alcohol and ethanol on liver toxicity. Simultaneous treatment of 2 g/kg ethanol by ip administration with 40 mg/kg allyl alcohol to rats increased the lethality significantly, accompanied by potentiation of the loss of hepatic glutathione. Collectively, these findings suggested that ethanol potentiated the hepatotoxicity and lethality induced by allyl alcohol probably through competing two metabolizing enzymes, ADH and ALDH.
이온교환체로서 금속-페난드롤린-메페남산 3원 착물을 이용한 메페남산의 정량
허문회(Moon Hye Hur),김대병(Dae Byung Kim),남수자(Soo Ja Nam),문현숙(Hyun Sook Moon),이미나(Mi Na Lee),정문모(Moon Mo Jung),안문규(Moon Kyu Ahn) 대한약학회 2001 약학회지 Vol.45 No.1
A method for the determination of anionic drug, mefenamate with ion-selective electrode using Fe(II)-1,10-phenanthroline chelate as a counter ion was developed. Benzyl nitrophenyl ether (BNPE) plasticized membrane was more selective and sensitive than the other tested membranes. This membrane electrode exhibits a linear response for 10-2 M~5 ×10-5 M of mefenamic acid with a slope of - 61.4mV/dec. in borate buffer sloutions (Ph 9.0). Potentiometric selectivity measurements revealed negligible interferences from various organic and ionorganic anions. Direct potentiometry and potentiometric titration method of mefenamic acid in capsule preparations are presented and compared.
MK-801 투여에 의한 몰핀의존성랫드 뇌선조체중 도파민신경전달물질의 변화
이선희(Sun Hee Lee),신대섭(Dae Sup Shin),이덕주(Duck Joo Rhie),유영아(Young A Yoo),류승렬(Seung Rel Ryu),김대병(Dai Byung Kim),이종권(Jong Kwon Lee),김부영(Pu Young Kim) 한국응용약물학회 1998 Biomolecules & Therapeutics(구 응용약물학회지) Vol.6 No.1
The roles of dopamine(DA) and N-methyl-D-aspartate(NMDA) system in the development and expression of morphine dependence were investigated by monitoring the concentrations of extracellular DA and its metabolites by in vivo microdialysis and simultaneous observation of behavioral changes in morphinedependent rats. Extracellular DA level in caudate putamen of morphine-dependent rat was decreased and the concentrations of its metabolites, dihydroxy phenylacetic acid(DOPAC) and homovanillic acid(HVA), were increased during naloxone-precipitated withdrawal. DA contents were recovered to normal levels by pretreatment of MK-801, a noncompetitive NMDA receptor antagonist, which may explain the mechanism of diminishing effect of MK-801 on withdrawal symptoms in morphine-dependent rats. MK-801(0.3 mg/kg, i.p.) induced the untoward harmful neurological signs such as ataxia and severe rotations, which may be produced by hyperactivation of dopaminergic system. These results suggest that MK-801 may inhibit the expression of morphine dependence by altering the dopamine release.
안문규(Moon Kyu Ahn),문현숙(Hyun Sook Moon),허문희(Moon Hye Hur),김대병(Dae Byung Kim),박승희(Sung Hee Park) 대한약학회 2001 약학회지 Vol.45 No.4
A simple and rapid determination of total retinol from various pharmaceuticals containing retinol derivatives was described. Retinol derivatives were hydrolyzed with alcoholic KOH to alcoholic retinol, which was determined by HPLC. Pretreatments and HPLC conditions depend on the kind of retinols and preparation forms. The total amount of alcoholic retinol could be determined with this method from many pharmaceutical preparation of retinol derivatives. Treating time of KOH, acidic reagents and HPLC conditions were investigated.
Nano-scale PMOSFET에서 Plasma Nitrided Oixde에 대한 소자 특성의 의존성
한인식,지희환,구태규,유욱상,최원호,박성형,이희승,강영석,김대병,이희덕,Han, In-Shik,Ji, Hee-Hwan,Goo, Tae-Gyu,You, Ook-Sang,Choi, Won-Ho,Park, Sung-Hyung,Lee, Heui-Seung,Kang, Young-Seok,Kim, Dae-Byung,Lee, Hi-Deok 한국전기전자재료학회 2007 전기전자재료학회논문지 Vol.20 No.7
In this paper, the reliability (NBTI degradation: ${\Delta}V_{th}$) and device characteristic of nano-scale PMOSFET with plasma nitrided oxide (PNO) is characterized in depth by comparing those with thermally nitrided oxide (TNO). PNO case shows the reduction of gate leakage current and interface state density compared to TNO with no change of the $I_{D.sat}\;vs.\;I_{OFF}$ characteristics. Gate oxide capacitance (Cox) of PNO is larger than TNO and it increases as the N concentration increases in PNO. PNO also shows the improvement of NBTI characteristics because the nitrogen peak layer is located near the $Poly/SiO_2$ interface. However, if the nitrogen concentration in PNO oxide increases, threshold voltage degradation $({\Delta}V_{th})$ becomes more degraded by NBT stress due to the enhanced generation of the fixed oxide charges.