• Industry Promotion Research
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• v.9 no.1
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• pp.249-257
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• 2024

This study aims to confirm the conditional direct effect of career development pressure on the effect of career continuous learning on career success through a sense of professional mission among Chinese young teachers in a university. Data were collected through a survey targeting 354 Chinese young teachers purposively sampled at a university in Guangdong, China. The collected data was analyzed using SPSS PC+ Win ver. 25.0 and SPSS PROCESS macro ver. 4.2. The applied statistical methods were frequency analysis, reliability analysis, correlation analysis, and conditional direct effect analysis. The conclusion of the study is as follows. First, a sense of professional mission had a significant positive correlation with career success but was found to have no significant correlation with career development pressure. Career development pressure showed a significant negative correlation with career success. Second, the conditional direct effect of career development pressure was confirmed in the effect of career continuous learning on career success through a sense of professional mission. Based on these results, this study proposed a plan to simultaneously utilize not only career continuous learning but also a sense of professional mission and career development pressure for young teachers' career success.

• Journal of the Korean Home Economics Association
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• v.48 no.5
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• pp.49-60
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• 2010

The present study explored effects of significance of study, pressure for study, and pressure for success on life satisfaction of adolescents, and moderating effect of parent-adolescent communication. Participants were 1,384 adolescents in elementary, middle, and high school, and they responded all the questionnaires by themselves. Results were as follows. Firstly, there were significant differences in extent of significance of study, pressure for study and success, parent-adolescent communication, and life satisfaction of adolescents according to their demographic variables. Secondly, the more they got significance on study, and the more their parents emphasized study and success, the lower their life satisfaction was. Finally, there was a moderating effect of parent-adolescent communication. As adolescents had a positive communication with their parents, the negative effects for the significance of study and pressure for study and success on their life satisfaction were lessened.

• Journal of Biomedical Engineering Research
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• v.24 no.1
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• pp.9-13
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• 2003

An assist device was developed to identify the epidural space by continously monitoring the air-filled catheter pressure. The pressure signal appropriately amplified and filtered enabled to alarm the needle introduction into the epidural space by thresholding detection. Ten LEDs provided a visual change of catheter pressure before alarming for user convenience. Clinical trials were performed in 30 patients with 83% success rate at the first trial. When failed, the second trial was enough for successful anesthesia. The air volume introduced during each anesthesia was less than 1ml, causing side effects. Air filling of the catheter could also minimize infection possibility. Therefore, the present device guarantees safe anesthesia with user convenience.

• The Korean Journal of Rheology
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• v.3 no.2
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• pp.124-134
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• 1991

세라믹 재료들을 성공적으로 사출성형하기 위한 적절한 사출조건을 얻기 위하여 그 동안 많은 실험을 하여 왔으나 게이트 크기가 미치는 영향에 대한 연구는 미진하였다. 본 연구에선 압출기를 사용하여 미세한 질화규소분말과 결합제시스템을 혼합하였으며 이러한 세라믹혼합물을 이용하여 사출압력, 보압시간, 보압, 배럴온도, 게이트의 형태와 크기 등을 변화시키면서 사출성형 실험을 수행하였다. 55%의 세라믹혼합물을 사출실험한 결과 적절한 게이트의 크기와 형태를 선택하고 105 MPa의 사출압력과 10초의 보압시간, 24$0^{\circ}C$의 배럴온 도와 같은 사출조건하에서 성형한다면 불완전 충전 체적수축과 젯팅현상을 최소화시킬수 있 어 성공적으로 인장시편과 굽힘시편을 성형할 수 있음을 알수있었다. 상용프로그램인 C-MOLD를 이용하여 사출조건과 게이트의 크기를 변화시키면서 혼합물의 유동특성을 해석 하였다. 유동해석 결과. 세라믹혼합물은 순수고분자보다 열전도도가 크고 비열이 작아서 고 화가 빨리 되므로 게이트의 크기는 사출압력, 배럴온도와 같은 사출조건과 더불어 중요한 사풀변수임을 예측할 수 있었다.

• 유체기계공업학회:학술대회논문집
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• 2000.12a
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• pp.318-324
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• 2000

액체로켓인 KSR-III는 점화시 및 연소실 압력의 이상 저하시 추진제가 지나치게 많이 공급되는 것을 막기 위하여 케비테이션 벤튜리를 사용한다. 본 연구에서는 Fluent가 제공하는 케비테이션 모형을 사용하여 케비테이션 벤튜리 내부의 공동 발생과 이에 따른 유량제어 현상을 해석하였다. 케비테이션 모형은 공동의 붕괴를 효과적으로 예측하지 못하는 단점이 있지만 벤튜리를 통과하는 유량은 공동이 발생하는 위치에서 유효 유로 감소에 의하여 제한되므로 유량제어 현상을 성공적으로 관찰할 수 있었다. 결과로서 벤튜리 상류의 압력이 일정하게 유지될 때 하류의 압력 변동에 대하여 유량이 변화하지 않음을 확인하였다. 상류의 압력이 24.1bar로 일정하게 유지되고 벤튜리에서 압력차이가 3bar 이하일 때 공동은 발생하지 않았다. 압력차가 6bar 이상일 때 공동이 발생하며 (압력차 6bar인 경우와 비교하여) 9bar, 12bar의 압력차에 대한 유량 증가는 각각 $5\%,\;7\%$에 그쳐 주어진 작동조건에서 벤튜리로 유량제어가 가능하였다.

• Journal of Biomedical Engineering Research
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• v.20 no.5
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• pp.587-592
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• 1999

압력측정시스템은 입각기동안 동적압력분포를 성공적으로 측정할 수 있으나 하중수용기-중간입각기, 말기입각기-전유각기의 전환기들에 대해서는 운동분석시스템을 사용하지않고는 정확한 정의가 불가능하다. 따라서 저자들은 수평자유보행 시 압력중심의 이동을 이해하기 위해서 정상적인 발을 가진 20-30대 성인남자 78명을 대상으로 동작분석과발바닥 압력측정을 동시에 수행하였다. 결과로 하중반응기-중간입각기 전환시기의 발바닥 압력중심점은 후족부와 중족부의 경계선에서 앞쪽으로 1.9$\pm$1.5frame(32$\pm$24msec)에 위치하였으며 말기입각기-전유각기 전환시기에는 중족골두 최대 압력점의 앞쪽으로 2.3$\pm$2.0 frame(38$\pm$33msec)에 위치하였다. 정상수평보행에 있어서 최초접지 순간 압력중심은 전방으로 빠르게 이동하다가 바로 급속히 감소하여 하중반응기-중간입각기의 전환시기에는 작은 속도로 이동하였다. 압력중심의 이동속도는 그 후 다시 서서히 증가하다가 전체 보행주기의 25% 전후에서 서서히 감소하여 비교적 일정하다가 말기입각기-전유각기의 전환시점에서 다시 급격한 증가를 보였다. 족부질환과 보행특성을 판단하는데 있어서 압력중심의 이동궤적은 매우 유용한 인자가 될 것으로 기대된다. 본 연구를 통해서 압력측정시스템만으로는 정의할 수 없었던 두 전환기인 하중반응기-중간입각기, 말기입각기-전유각기를 결정할 수있게 되었다.

• Tuberculosis and Respiratory Diseases
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• v.45 no.4
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• pp.813-822
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• 1998

Background: Extubation is recommended to be performed at minimum pressure support (PSmin) during the pressure support ventilation (PSV). In field, physicians sometimes perform additional 1 hr T-piece trial to the patient at PSmin to reduce re-intubation risk. Although it provides confirmation of patient's breathing reserve, weaning could be delayed due to increased airway resistance by endotracheal tube. Methods: To investigate the effect of additional 1 hr T-piece trial on weaning outcome, a prospective study was done in consecutive 44 patients who had received mechanical ventilation more than 3 days. Respiratory mechanics, hemodymic, and gas exchange measurements were done and the level of PSmin was calculated using the equation (PSmin=peak inspiratory flow rate $\times$ total ventilatory system resistance) at the 15cm $H_2O$ of pressure support. At PSmin, the patients were randomized into intervention (additional 1 hr T-piece trial) and control (extubation at PSmin). The measurements were repeated at PSmm, during weaning process (in cases of intervention), and after extubation. The weaning success was defined as spontaneous breathing more than 48hr after extubation. In intervention group, failure to continue weaning process was also considered as weaning failure. Results: Thirty-six patients with 42 times weaning trial were satisfied to the protocol. Mean PSmin level was 7.6 (${\pm}1.9$)cm $H_2O$. There were no differences in total ventilation times (TVT), APACHE III score, nutritional indices, and respiratory mechanics at PSmin between 2 groups. The weaning success rate and re-intubation rate were not different between intervention group (55% and 18% in each) and control group (70% and 20% in each) at first weaning trial. Work of breathing, pressure time product, and tidal volume were aggravated during 1 hr T-piece trial compared to those of PSmin in intervention group ($10.4{\pm}1.25$ and $1.66{\pm}1.08$ J/L in work of breathing) ($191{\pm}232$ and $287{\pm}217$cm $H_2O$ s/m in pressure time product) ($0.33{\pm}0.09$ and $0.29{\pm}0.09$ L in tidal volume) (P<0.05 in each). As in whole, TVT, and tidal volume at PSmin were significantly different between the patients with weaning success ($246{\pm}195$ hr, $0.43{\pm}0.11$ L) and the those with weaning failure ($407{\pm}248$ hr, $0.35{\pm}0.10$L) (P<0.05 in each). Conclusion : There were no advantage to weaning outcome by addition of 1 hr T-piece trial compared to prompt extubation to the patient at PS min.

• Journal of Information Technology Applications and Management
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• v.13 no.3
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• pp.29-57
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• 2006

Small and medium-sized companies (SMEs) face a number of different kinds of barriers to adopt information technology, including the lack of information, limited financial and technical resources, and absence of the well-trained work force in the realm of information technology. But application service provider (ASP)enables these SMEs to informatize. This paper is focused on studying the cases of the adoption and use of the ASP-based ERP systems that 7 SME shad adopted. The factors that influence the adoption and use of SMEs' ASP-based ERP systems are divided into the user companies that adopted the systems, the systems vendors, and environment. From the viewpoint of the user company, the successful adoption and use of the systems is significantly influenced by the clear motive of adopting the systems, the financial readiness, and the strong intention of CEO for pushing ahead with e-Business. From the systems vendor, it is influenced by the technical expertise of the vendor, the knowledge of the user company, and the experience of the systems development. From the perspective of environment, it is influenced by the push from the players in the value chains. The companies that had adopted the ASP-based ERP systems and that had extended the level of systems use had the benefits through reducing the cost, improving the internal business process, and achieving the learning and growth of the organization.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2004.04a
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• pp.35-38
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• 2004

부틸알데히드로 오염된 대상 부지에 Biosparging 공법의 현장 적용을 위해 적정 공기 주입 압력 조건을 도출한 결과, 주 오염층인 자갈질 모래층에 공기주입 가능 파괴압력(Pe)는 약 300mmAq로 측정되었으며 4,500mmAq 압력 조건에서는 용존 산소농도의 영향 반경이 약 3 m로 나타났다. 위의 조건을 적용하여 약 150일간 운전한 결과, 영양물질을 투입하지 않은 초기 90일 동안 최고농도 대비 약 90%가 저감되었으며 그 이후에 영양물질을 투입하여 초기 최고 농도 대비 96%가 저감되어 복원목표치인 50ppm을 모든 지역에서 만족시켰다. 또한 생분해 반응속도가 k=0.03/day로 나타나 휘발성이 낮고 생분 해도가 뛰어난 부틸알데히드로 오염된 자갈질 모래층에 Biosparging공법이 성공적으로 적용된 사례이다.

• Journal of the Korean Vacuum Society
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• v.10 no.1
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• pp.9-15
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• 2001

The total pressure and partial pressure of small cavity for flat panel display have been successfully measured by using an ultra-high vacuum chamber with mass spectrometer. The total pressure in the panel was in the range of $10^{-6}$ Torr and the major partial pressure affecting increase in total pressure were those of Ar, $CH_4$and He. The baking temperature during evacuation process was very important for high-vacuum package, the total pressure and partial pressure of $CH_4$ were decreased as the increase of baking temperature.