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Younghwan Son,Chang-Ki Baek,In-Shik Han,Han-Soo Joo,Tae-Gyu Goo,Ooksang Yoo,Wonho Choi,Hee-Hwan Ji,Hi-Deok Lee,Kim, D.M. IEEE 2009 IEEE TRANSACTIONS ON NANOTECHNOLOGY Vol.8 No.5
<P>This paper presents the depth profile of oxide trap density, extracted from the dual gate processed thermally grown oxide in NO ambient and remote plasma nitrided oxides by using multifrequency and multitemperature charge pumping technique in conjunction with the tunneling model of trapped charges. Nitrided oxide is widely used to improve the reliability of nanoscale MOSFETs because it can decrease the degradation of gate oxide due to the generation of traps therein. Based on the measurement, the optimum nitrogen concentration in such typical nitrided process is discussed in correlation with the gate oxide thickness for nanoscale CMOSFETs.</P>
석지혜(Ji Hae Seok),정성욱(Seong Wook Chung),손성권(Seong Kweon Son),이리라(Ri Ra Lee),이덕희(Deok Hi Lee),강인구(In Koo Kang),김익수(Ik Soo Kim) 대한산부인과학회 1999 Obstetrics & Gynecology Science Vol.42 No.8
Cyclopia is rare congenital craniofacial anomaly, in which the eyes are fused together and located in a single orbit. It is consistently associated with severe holoprosencephaly, which is the failure of cleavage of the prosencephalon with a deficit in the midline facial development. chromosomal study revealed 47, X( ), +13 (Patau syndrome).
이경순,류지아,송인옥,정혜원,안정자,손영수,정은철,우복희 梨花女子大學校 醫科大學 醫科學硏究所 1993 EMJ (Ewha medical journal) Vol.16 No.2
The diagnosis of cervical incompetency Is routinely accomplished by reviewing the clinicalhistory and pelvic examination subjectively. Rescently by using ultrasonography. the objectivemethod in diagnosis of cervical incompetency was developed. Especially, the transvaginal sonog-raphy can provide clear visualization of uterine cervix with an empty bladder without distrosionof cervix which was developed when abdominal sonography with distended bladder. So author performed the study in 46 cases of pregnant women of which menstrual agewas 12 weeks to 36 weeks(normal control group 36 cases, risk group 11 cases) during theperiod of May, 1992 to Febburary, 1993. And these two groups were performed trasvaginal sonog-raphy and measured length and diameter of cervix. And the result were follows ; 1) The mean age was higher in risk group than normal control group. the gestational agewas not significantly different between two groups, and the gravity and parity was higher inrisk group than normal control group. 2) As rneasuring the lengt and diameter of cervical canal by transvaginal sonogram innullipara and multipara in normal control group, each measurements were not significantlydifferent between nullipara and multipara. 3) The mean length of cervix by transvaginal sonography was 3.0±0.97cm in risk group,4.7±0.89cm in normal control group and the cervical length was significantly shorter in riskgroup than normal control group(P<0.01). 4) The mean diameter of cervix by transvaginal sonogram was 2.0±0.37cm in risk group,0.5±0.21cm in normal control group and the diameter of cervix was significantly greater inrisk group than normal control group(P<0.01). Transvaginal sonographic measurement of cervical length and diameter in diagnosis of incompetent internal os of cervix is noninvasive and relatively objective method.
수명예측 방법에 따른 마이크로스위치의 수명분석 및 신뢰도 예측
지정건(Jeoung-Geon Ji),신건영(Kun-Young Shin),이덕규 (Duk-Gyu Lee ),손영진(Young-Jin Son ),이희성 (Hi Sung Lee ) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10
Reliability means that a product maintains its initial quality and performance at certain period of time(time distance cycle etc) under given condition without failure. Given conditions include both environmental condition and operating condition. Environmental condition means common natural environment such as temperature humidity vibration and working condition means artificial environment such as voltage current load install place hours of use which occurs during using the product. In the field of railway vehicles although components of railway vehicles with reliability are the trend of mandatory as persisting period of railway vehicles is extended using components of railway vehicles is insufficient for the practical reliability assessment. but the meaning of the first railway operating agnecy to acquire the parts in the field the data suggest the reliability of products if you can and can show the reliability of modular units and modular units can provide the reliability of if you can present reliability of the entire system is thought to be here In this study lifespan of micro-switch for master controller is analyzed and prediction is performed based on its field data considering the special circumstances of railway vehicles operating agency such as a large number of trains operates on the same line.
'다유들깨'품종의 하배축에서 캘러스를 통한 고효율 식물재분화
서여월,손지희,강홍규,선현진,이효연,Ruyue Xu,Ji-Hi Son,Hong-Gyu Kang,Hyeon-Jin Sun,Hyo-Yeon Lee 한국식물생명공학회 2023 JOURNAL OF PLANT BIOTECHNOLOGY Vol.50 No.1
본 연구는 종유용 들깨 품종인 다유들깨'의 유식물체에서 캘러스 유도를 통한 고효율의 재분화 체계를 구축하기 위해 수행되었고 이미 보고된 바 있는'남천들깨'와 함께 연구를 진행하였다. 캘러스는 잎, 자엽, 하배축 중 0.1 mg/L NAA와 0.5 mg/L BA가 첨가된 배지에서 배양된 다유들깨의 하배축에서 가장 건강한 캘러스가 형성되었다. 암상태와 장일조건에서 각각 캘러스를 유도한 후 신초 재분화를 유도했을 때 모든 조건에서 남천들깨보다 다유들깨가 재분화율이 월등하게 높았다. 또한 0.1 mg/L NAA와 0.5 mg/L BA 배지의 암상태와 장일조건에서 다유들깨 하배축의 신초 재분화율은 각각 86.7%와 84.4%로 두 조건 간 차이는 낮은 것으로 조사되었지만 전체적으로 암조건에 비해 장일조건에서 유도된 캘러스의 재분화 빈도가 높았다. 본 연구에서 다유들깨의 하배축으로부터 고효율의 재분화 조건을 확립하기 위해 다양한 식물생장호르몬 조합실험을 수행한 결과 NAA 없이 0.5 mg/L BA 만 첨가된 배지에서 가장 높은 90%의 재분화율을 보여 주었으며 이 중 정상적인 식물체가 70.5% 와 비정상적인 식물체가 19.3%로 조사되었고 NAA가 첨가되거나 농도가 높아질수록 비정상 식물체의 출현율이 높아졌다. 정상적으로 재분화된 신초는 1/2 MS 배지로 옮긴 후 10~15일 후에 뿌리가 관찰되었고 30일 후에는 완전한 식물체로 성장하였다. 본 연구에서 확립된 다유들깨 하배축을 이용한 재분화체계는 지금까지 보고된 다른 들깨 품종들의 재분화 체계에 비해 재분화 효율이 높았으며 향후 들깨에서 조직배양과 형질전환에 의존하는 유전자편집 등의 분자육종 분야에 유용하게 이용될 수 있을 것으로 기대된다. This study was conducted to establish an efficient plant regeneration system in 'Dayu', a Korean variety of Perilla frutescens developed for seed oil production, in conjunction with the previously studied variety 'Namcheon'. The healthiest callus was formed on the hypocotyl explants cultured on a medium containing 0.1 mg/L NAA and 0.5 mg/L BA, outperforming the leaf and cotyledon samples. In both dark and long-day conditions, Dayu consistently exhibited significantly higher shoot regeneration rates compared with Namcheon. The highest shoot regeneration rates in Dayu were observed from the hypocotyl explants cultured on 0.1 mg/L NAA and 0.5 mg/L BA media, with shoot regeneration rates of 84.4% and 86.7% under dark and long-day conditions, respectively. Various combinations of plant growth regulators were tested to establish the optimal shoot regeneration conditions for Dayu hypocotyl explants. The results demonstrated that the highest shoot regeneration rate (90%) was achieved when 0.5 mg/L of BA was added to the medium without NAA. Among the regenerated shoots, 70.5% were normal plants, while 19.3% were abnormal. The addition of NAA or an increase in its concentration led to a higher occurrence of abnormal plants. After the regenerated shoots were transferred to 1/2 MS medium, roots were observed within 10-15 days. By day 30, they had developed into complete plants. The results obtained from the regeneration experiments with the perilla variety Dayu can valuably inform molecular breeding reliant on transformation techniques such as genome-editing and genetic modification technology.