• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2000년도 추계종합학술대회
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• pp.475-479
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• 2000

The box capacitor structure with H5G-Si described here reliably achieves a cell capacitance of 28fF with a cell area of a 0.482f${\mu}{\textrm}{m}$$^2$ for 128Mbit DRAM. An H5G-Si formation technology with seeding method, which employs Si$_2$H$_{6}$ molecule irradiation and annealing, was applied for realizing 64Mbit and larger DRAMS. By using this technique, grain size controlled H5G-Si can be fabricated on in-situ phosphorous doped amorphous silicon electrodes. The HSG-Si fabrication technology achieves twice the storage capacitance with high reliability for the stacked capacitors.s.

• 대한약학회:학술대회논문집
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• 대한약학회 2002년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.2
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• pp.331.3-332
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• 2002

A novel penicillin G acylase (PGA)-producing bacterial strain was isolated from soil by using the Serratia marcescens overlay technique. The isolated strain was identified as Leclercia adecarboxylata based on the analyses of the biochemical characteristics (API 20E). the cellular fatty acid profile. and the 16S rDNA sequences. The gene encoding the PGA (pac gene) was cloned into the pHSG399 vector and the recombinant E. coliHB101 clones harboring the pac gene were isolated on agar plates containing phenylacetyl-L -leucine and penicillin G. (omitted)

• 생명과학회지
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• 제21권4호
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• pp.529-533
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• 2011

라미닌-1에 의해 분화가 유도되는 것으로 알려져 있는 HSG 및 PC-12에서는 라미닌-1에 의해 MT 유전자의 발현이 유도되었지만 반면 분화 역량을 지니지 않은 암세포인 유방암(MDA-231, MDA-435) 세포와 전립선 암인 PC-3 세포에서는 라미닌-1의 처리가 MT 유전자의 변화에 영향을 미치지 못하는 것이 관찰되었다. 라미닌-1에 의해 분화가 유도되는 현상 및 이에 따른 MT 유전자의 발현증가가 암의 전이 능력 및 악성화와 관계가 있는지를 관찰하기 위해 정상에서부터 전이 및 악성 정도가 다른 5가지 종류의 전립선 암을 대상으로 라미닌-1에 의한 MT 유전자의 발현 변화를 관찰한 결과 정상적인 전립선 외피세포인 RWPE-1과 전이 및 악성화가 낮은 WPE1-NA22의 경우 라미닌-1에 의해 MT 유전자의 발현이 증가하였으며, 악성화 정도가 높은 WPE1-NB14, WPE1-NB11, 및 WPE1-NB26에서는 라미닌-1의 처리에도 MT 유전자의 발현이 증가하지 않는 것이 관찰되었다. 이러한 결과를 통해 라미닌-1은 정상 세포의 분화를 유도하며 이에 따라 MT 유전자를 유도하며 분화가 유도되지 않는 악성 암에서는 MT 유전자의 발현이 유도되지 않는 것으로 확인되었다.

• 한국식생활문화학회지
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• 제35권5호
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• pp.483-492
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• 2020

Dietary components can modulate stress, inflammatory indicators, and health risk. This study examined the relationship among diet, metabolic disease risk, and perceived stress in Korean adult females using the 2017-2018 Korea National Health and Nutrition Examination Survey. A total of 4,353 adult women aged 19-64 years were classified into four groups according to perceived stress level: very high stress group (VHSG, n=225), high stress group (HSG, n=1,079), moderate stress group (MSG, n=2,532), and low stress group (LSG, n=517). Data collection included the sociodemographics, anthropometrics, blood profile, and dietary survey. After adjusting for covariates, those in the VHSG had a higher body mass index (p=0.013) and obesity rate (p=0.053) with a shorter sleep time than the LSG group. The VHSG also tended to have a higher plasma LDL-cholesterol, hsC-reactive protein and lower levels of HDL-cholesterol, vitamin A, and vitamin E than the low stress group. High stress subjects demonstrated increased breakfast skipping frequency (p<0.0001), decreased fiber intake (p=0.001), potassium (p=0.041), and vitamin A (p=0.011) than the low stress ones. Therefore the perceived stress level was associated with the inflammatory indicators, obesity, and lack of anti-inflammatory or antioxidant nutrients. The dietary components may be an important mediator of stress and metabolic disease.

• 한국운동역학회지
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• 제20권3호
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• pp.261-266
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• 2010

Human body is hard to be in perfect balance during walking. Most of time the trunk is supported by one leg and the center of mass(COM) falls to the contralateral side. Thus, dynamic variables such as the velocity of the COM should be considered when gait stability is evaluated. The purpose of this study was to investigate whether the extrapolated center of mass(XCom) which utilized the COM position and its velocity, is appropriate to evaluate gait stability. Ten healthy adults participated in this study and performed 3 different types of gaits(normal(NG), hands on waists(HWG), and hands on shoulders(HSG)) onto 4 different types of obstacle(obstacle height: 0%, 30%, 40% and 50% of leg length). Medio-lateral Com-CoP and XCom-CoP inclination angle were calculated during support phase. For all condition, greater M-L XCoM-CoP inclination angles were found(p<.05) compared with those of matched obstacle height CoM-CoP. Especially, M-L XCoM-CoP inclination angle at 50% height revealed the best condition for monitoring dynamic stability. Significantly increased in M-L XCoM-CoP inclination angle was found(p<.05) as obstacle height increased on NG and HWG.

• 전자공학회논문지SC
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• 제40권6호
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• pp.87-94
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• 2003

본 연구에서는 고속 발전기를 고속의 가스 터빈 엔진에 직결 장착한 터보 제너레이터 시스템의 개발 연구결과를 보인다. 고속 발전기를 직결 장착한 터보 제너레이터 시스템은 터보 샤프트 발전 시스템에 비하여 무게, 크기, 윤활 시스템, 시스템의 복잡성 측면에서 많은 장점을 가지고 있다. 그러나 고속 회전체 시스템의 직접 운전에 따른 안정된 고속 제너레이터의 설계, 가스 터빈 엔진의 시동 시의 신뢰성 있는 점화를 위한 고속 모터 구동 알고리즘 구현, 고 주파수의 출력 전력을 상용 교류전력 혹은 필요한 직류 전력을 얻기 위한 전력 변환 장치의 설계를 요구한다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2001년도 추계학술대회 논문집 Vol.14 No.1
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• pp.341-345
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• 2001

In this study, nano-sized powders of $Si0_2-0^{\sim}15mol%B_2O_3$ composition were prepared by sol-gel processing method using TEOS(Tetra ethyl ortho silicate) and $H_3BO_3$ solution. The powders were tape-cast on High silicate glass sheet(HSG) substrate and sintered to form a layer of undercladding for the planar light wave module, During the sol-gel processing, $H_2O/Si$ mole ratio were varied to modify the size of the powders in a range from 600 to 75nm. The dispersion of the powder was modified by changing the pH of the slurry. Sintering temperature of the tape was observed to decrease with the size of the powder and the $B_2O_3$ content in the powder. When the silica powders of 75-125nm in diameter containing 15mol% $B_2O_3$ were used, 98 TD% was obtained at $1250^{\circ}C$, which is approximately $300^{\circ}C$ reduction in sintering temperature compared with micrometer-sized powders.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2001년도 추계학술대회 논문집
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• pp.341-345
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• 2001

In this study, nano-sized powders of SiO$_2$-0∼15mo1%B$_2$O$_3$ composition were prepared by sol-gel processing method using TEOS(Tetra ethyl ortho silicate) and H$_3$BO$_3$ solution. The powders were tape-cast on High silicate glass sheet(HSG) substrate and sintered to form a layer of undercladding for the planar light wave module. During the sol-gel processing, H$_2$O/Si mole ratio were varied to modify the size of the powders in a range from 600 to 75nm. The dispersion of the powder was modified by changing the pH of the slurry. Sintering temperature of the tape was observed to decrease with the size of the powder and the B$_2$O$_3$ content in the powder. When the silica powders of 75∼125nm in diameter containing 15mo1% B$_2$O$_3$ were used, 98 TD% was obtained at 1250$^{\circ}C$, which is approximately 300$^{\circ}C$ reduction in sintering temperature compared with micrometer-sized powders.

• 대한물리의학회지
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• 제5권2호
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• pp.273-280
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• 2010

Purpose : The purpose of this experiment was to evaluate the pre-application effect of low frequency electrical stimulation(LFES) on VEGF expression of atrophic muscle and to determine the optimal pre-application period of LFES for prevent muscle atropy Methods : Twenty-five adult sprague-dawley rats were randomly assigned to weight bearing group, hindlimb suspension for 14 days group, hindlimb suspension with pre-application of LFES for 14 days group, hindlimb suspension with pre-application of LFES for 11 dsys group and, hindlimb suspension with pre-application LFES for 7 dsys group. 16Hz of Biphasic pulse current was applied to gastrocnemius for 15min per days. Results : VEGF were decreased expression in HSG groups, whereas VEGF were significantly increased in HS+ES14G, HS+ES11G, HS+ES7G groups Conclusion : LFES during the hindlimb suspension showed a positive effect in VEGF induction and early application is strongly encourage VEGF induction. This indicated that pre-application of LFES could prevent muscle atrophy.

• 한국기계가공학회지
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• 제20권12호
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• pp.36-43
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• 2021

In this study, the optimal feed system and process conditions that can simultaneously minimize each warpage occurring in the two shape features of the 2P Header HSG, a connector part for automobiles, were determined through injection molding simulation analysis. First, we defined each warping deformation of the two features geometrically and quantified them approximately using the injection molding simulation data. For design optimization, a full factorial experiment was conducted considering the feed system, resin temperature, and packing pressure as design variables, and a follow-up experiment was conducted based on the analysis of the average warpage. In this study, an optimal design was generated considering both the warpage result and resin-saving effect. In the optimal design, the warpages of the two shape features were predicted to be 0.18 and 0.29 mm, and these warpages were found to meet the allowable limit of warpage, which is 0.3 mm, for part assembly.