• 한국의류산업학회지
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• 제19권5호
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• pp.579-588
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• 2017

This study investigates the wearing behavior and athleisure wear design preferences of women in their twenties as related to the design development of athleisure wear. A questionnaire survey was conducted on 185 women in their 20s. The survey was conducted from September to October 2016. Questionnaire items consisted of respondents' general items, athleisure wear and preference related items, and athleisure wear purchase related items. We collected 185 questionnaires from participants; subsequently, 169 were used as analytical data (except for incomplete questionnaires). The results of the study are as follows. Fit and wear comfort was the most important factor in the selection of athleisure wear. As a result of investigating the popularity of the athletic wear brand, the preference for the total sportswear brand was higher than the professional athletic wear brand. When the preferred colors were examined, the achromatic colors were ranked higher than chromatic colors. An examination of the preferred designs according to items indicated that the bra top preferred the 'U' shaped front plate and the 'Y' base basic type; in addition, T-shirts with the round neckline and the 1/4 length sleeves were preferred as tops. Leggings preferred long length type. It is necessary to develop a brand that matches the preference of the twenties' consumers by adjusting the aged target that can avoid the overheated competition and develop a niche market.

• 대한기계학회논문집B
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• 제40권9호
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• pp.613-620
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• 2016

유체의 전도율(conductivity)이 전자기유량계의 특성에 미치는 영향을 평가하기 위해 소형 전자기 유량계를 설계 제작하였다. 유량계의 측정관(measuring tube)은 $4mm{\times}3mm$의 직사각형 단면을 가지며 길이는 9 mm이다. 전극은 직경이 1.5 mm인 점전극과 단면이 $2mm{\times}3mm$인 면전극으로 설계하였다. 코일의 열 발생에 영향을 미치는 자화주파수, 회전수 및 굵기를 변화시키면서 최적값을 찾았다. 최적화된 측정관은 자속밀도(magnetic flux density) 0.04 T (400 gauss)를 발생시키며 안정되고, 선형적인 유량신호를 얻을 수 있었다. 유량계를 특성을 평가하기 위해 중량식 유량계 교정 장치를 제작하였다. 유동율 범위는 최대 $1.17{\times}10^{-5}m^3/s$(700 cc/min)이며 ISO규격에 따라 유동량 결정의 불확도를 평가하였으며 크기는 0.06 % 이내이었다. 유체의 전도율은 $3-11{\mu}S/cm$ 사이에서 조절하였다.

• 대한물리의학회지
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• 제7권1호
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• pp.59-67
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• 2012

Purpose : This study was somatosensory less in patients with idiopathic scoliosis somatosensory input to the lumbar stabilization exercises carried out to determine the most effective treatment method to be stable and unstable in terms of supporting the lumbar stabilization exercises the patient's torso length and postural sway by comparing the distance from a standing position and looked for differences in effect on the balance. Methods : The subjects of the study were 18 patients who showed the symptom of scoliosis. The study classified the patients into two experimental groups, one using an unstable surface and one a fixed surface, and the patients were required to do a lumbar stabilization exercise a total of 12 times for 60 minutes per session, three times a week for four weeks. The study carried out a paired comparison t-test so as to compare differences between measurement values in each experimental group before and after the exercise. Results : Superior iliac spine on the left, there was a significant reduction in the group doing the lumbar stabilization exercise on an unstable surface (p<0.05). Regarding change in sway distance to the left and right directions in the group doing the lumbar stabilization exercise on the unstable surface, there was a significant decrease in both the condition of closed eyes or open eyes (p<0.05). As for change in sway distance in forward-and-backward direction, there was a significant reduction in the condition of either closed eyes or open eyes (p<0.05). Conclusion : The lumbar stabilization exercise on an unstable surface improved the trunk posture of patients with scoliosis symmetrically, and the static balance ability in a standing posture was discovered to be improved. In the future, the lumbar stabilization exercise on an unstable surface may be used as a posture correction and balance increase exercise for patients with scoliosis.

• Journal of Microbiology and Biotechnology
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• 제11권2호
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• pp.186-192
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• 2001

A primary culture of human fetal hepatocytes was obtained through a therapeutic abortion process at 26 weeks of gestation period. More than $10^8$ cells were seeded on a plastic plate. These hepatocytes were infected with hepatitis B virus (HBV). The HBV was purified from serum of one chronic HBV carrier. Transformed hepatocytes were subcultured in a 10% FBS-supplemented medium. The morphology of the transformed cell was epithelial-like. The cells from the first pass showed signs of early proliferation and had a latent period of more than 3 months after 6-7 passages. After the rest period, the transformed cell proliferated actively and they were subcultured every three days. Transformed hepatocytes were characterized by detection of the HBV transcript by RT-PCR. The secretion of virions from transformed cells was investigated by PCR with the cell medium. Two types of virions secreted into the culture medium were examined by using the transmission electron microscope. Another approach to study the secretion of virions in to culture medium was carried out with HBV antibody. HBsAg was detected in the culture medium of transformed cells using ELISA and Western blot analyses. These data suggested that the human fetal hepatocyte cell line has been established by infection of HBV, in which this cell line secreted viral particles into the culture medium.

• The Korean Journal of Physiology and Pharmacology
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• 제16권2호
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• pp.119-123
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• 2012

In the present study, the antinociceptive profiles of $Agrimonia$ $pilosa$ $Ledeb$ extract were examined in ICR mice. $Agrimonia$ $pilosa$ $Ledeb$ extract administered orally (200 mg/kg) showed an antinociceptive effect as measured by the tail-flick and hot-plate tests. In addition, $Agrimonia$ $pilosa$ $Ledeb$ extract attenuated the writhing numbers in the acetic acid-induced writhing test. Furthermore, the cumulative nociceptive response time for intrathecal (i.t.) injection of substance P (0.7 ${\mu}g$) was diminished by $Agrimonia$ $pilosa$ $Ledeb$ extract. Intraperitoneal (i.p.) pretreatment with yohimbine (${\alpha}_2$-adrenergic receptor antagonist) attenuated antinociceptive effect induced by $Agrimonia$ $pilosa$ $Ledeb$ extract in the writhing test. However, naloxone (opioid receptor antagonist) or methysergide (5-HT serotonergic receptor antagonist) did not affect antinociception induced by $Agrimonia$ $pilosa$ $Ledeb$ extract in the writhing test. Our results suggest that $Agrimonia$ $pilosa$ $Ledeb$ extract shows an antinociceptive property in various pain models. Furthermore, this antinociceptive effect of $Agrimonia$ $pilosa$ $Ledeb$ extract may be mediated by ${\alpha}_2$-adrenergic receptor, but not opioidergic and serotonergic receptors.

• 한국산학기술학회논문지
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• 제11권6호
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• pp.2124-2128
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• 2010

본 연구에서는 MAPK 저해제인 U0126이 난자성숙과정에서 특히 감수분열, 미세소관 형성 그리고 액틴 필 라먼트 형성에 미치는 영향을 조사하였다. 그 결과 MAPK 단백질은 12시간째에 인산화되기 시작하여, 24시간째에 대부분 인산화 되었고 metaphase II에 이르기 까지 유지되었다. 배포단계(GV)에 있는 난자를 U0126의 $20{\mu}M$ 농도로 처리하였을 때 MAPK의 인산화가 완전히 억제되었으나 배포의 파열 단계(GVBD)로의 성숙에는 진행하였으나, metaphase I까지는 발달하지 못하였다. 또한 MAPK 저해제로 인해 비정상적인 방추사의 형성을 초래하였다. 난자를 배포의 파열단계(GVBD) 이후에 U0126을 처리하였을 때 극체의 방출은 정상 이였으나 중기 판의 배열과 염색체의 분열은 비정상적 이였다. 결론적으로, 유사분열 활성화 효소단백질인 MAPK의 활성은 돼지 난자의 체외성숙과정에서 배포단계(GV)의 염색체의 배열과 감수분열의 완성에 중요한 조절 인자임을 이번 연구를 통해 알 수 있었다.

• 한국미생물·생명공학회지
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• 제45권4호
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• pp.343-353
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• 2017

In the present study, the isolation of selenium (Se)-enriched bacteria from rumen fluid and hot spring water was carried out. Rumen fluid samples were taken from cannulated goats fed a basal diet and the water samples were collected from Selayang hot spring, Selangor-Malaysia. A total number of 140 Se-tolerant isolates were obtained aerobically using an Se-enriched medium and spread plate technique. All the isolates were initially screened for the ability to transform the Se-containing medium to a red-orange culture using a spectrophotometer. Twenty isolates of dark red-orange medium were selected for a screening of the highest Se-containing protein accumulating strains using the dialysis technique and icp.ms to measure the Se content. Four isolates, identified as Enterobacter cloacae (ADS1, ADS7, and ADS11), and Klebsiella pneumoniae (ADS2) from rumen fluid origin, as well as, one isolate from hot spring water (Stenotrophomonas maltophilia (ADS18)), were associated with the highest biomass organic Se-containing protein when grown in a medium enriched with $10{\mu}g/ml$ sodium selenite. In addition, around $50{\mu}g/100{\mu}g$ of the absorbed inorganic Se was accumulated as an organic form. Organic Se-containing protein in all the selected strains showed antioxidant properties in the range of 0.306 to 0.353 Trolox equivalent antioxidant capacity (TEAC) mg/ml. Therefore, these strains may offer a potential source of organic Se due to their Se-tolerant nature and higher biomass organic to inorganic Se ratio.

• Korean Chemical Engineering Research
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• 제47권6호
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• pp.688-694
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• 2009

PCB의 먼지 제거용 세정제로 사용되는 스프레이형 세정제를 선정하여 이에 대한 청정도를 평가하였다. 친환경적인 대체 세정제를 채택하기 위해서는 세정제의 세정성, 환경성, 경제성을 평가하여 체계적인 선정절차에 의거하여 도입 및 적용하여야 한다. 객관적이고 효율적인 세정성 평가방법의 정립이 현시점에서 매우 중요하다. 본 연구에서는 여러 세정성 평가 방법들 중 표면관찰평가법인 SEM-EDX(Scanning Electron Microscopy/Energy-Dispersive X-ray) 분석과 적외선열화상카메라(THERMOVISION A20 model)를 이용하여 청정도를 평가하였다. CT-2770 모델의 사운드카드를 $2{\times}2cm$로 잘라내어 스프레이 세정 전과 후의 청정도를 SEM의 이미지 분석을 통해 관찰할 수 있었고 EDX의 성분분석을 통해 먼지의 제거율을 정량화할 수 있었다. 컴퓨터의 P4T-E 모델의 마더보드와 IPC-A-36 모델의 기판을 사용, 오염물로 먼지와 철가루를 사용하여 열화상카메라로 세정 전, 후의 상온과 $50^{\circ}C$ Oven에 방치된 시간의 차이에 따른 온도의 변화를 비교하였다.

• 한국태양에너지학회 논문집
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• 제36권4호
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• pp.57-65
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• 2016

Domestic photovoltaic system for roof-top is installed towards the south at an angle of 20 to 35 degrees and the shape of PV array is divided into two kinds; a plane shape and a curved shape. This paper aims to understand an actual condition of PV facility and strengths and weaknesses of support structure production and installation and to consider the best PV surface shape by analyzing theoretical logics of these two surface shapes and architectural perspective-based realistic case studies. This study targeted 98 facilities including common houses, public institutions and education institutions. In common houses, all of 59 PV facilities have a plane surface. In public institutions, 7 of 15 PV facilities have a curved array surface and 8 PV facilities have a plane surface. In education institutions, also, 14 of 24 PV facilities have a plane array surface and 10 PV facilities have a curved surface. Most of 98 facilities have a flat roof supporting shape. However, it was found that the curved shape wasn't positive for PV generation due to the change of radial density and it was at least 10 % more expensive to produce its structure. Also, domestic general large single-plate PV facilities have problems of harmony with buildings and wind load. Therefore, it is considered that for fixed-type roof-top PV, a plane PV array shape is good for optimum generation and economic efficiency and a parallel array structure on the roof surface is favorable to wind load and snow load without being a hindrance to the building facade.

• 대한용접접합학회:학술대회논문집
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• 대한용접접합학회 2002년도 Proceedings of the International Welding/Joining Conference-Korea
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• pp.561-569
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• 2002

Laser has been called a "Quantum Machine" because of its mechanism of generation since the development on July 7,1960.by T.H.Maiman. We can now use this machine as a tool for manufacturing in industries. At present, 45kW CO2 laser, 10kW Nd:YAG laser, 6kW LD pumped YAG laser and 4kW direct diode laser facilities are available for welding a heavy steel plate of 40mm in thickness and for cutting metals at high speed of 140m/min. Laser Materials Processing is no longer a scientific curiosity but a modern tool in industries. Lasers in manufacturing sector are currently used in welding, cutting, drilling, cladding, marking, cleaning, micro-machining and forming. Recently, high power laser diode, 10kW LD pumped YAG laser, 700W fiber laser and excimer laser have been developed in the industrialized countries. As a result of large numbers of research and developments, the modem laser materials processing has been realized and used in all kinds of industries now. In the present paper, metallurgical studies on laser materials processing such as porosity formation, hot cracking and the joint performances of steels and aluminum alloys and dissimilar joint are discussed after the introduction of laser facilities and laser applications in industries such as automotive industry, electronics industry, and steel making industry. The wave towards the use of laser materials processing and its penetration into many industries has started in many countries now. Especially, development of high power/quality diode laser will be accelerate the introduction of this magnificent tool, because of the high efficiency of about 50%, long life time and compact.