대학 계열별 교육수요자의 대학이미지, 대학만족, 전공만족, 학업지속의향의 차이분석

최진호(Jin-Ho Choi) 피터드러커 소사이어티 2023 창조와 혁신 Vol.16 No.4

This study is a secondary study by Choi and Jang(2023), who proved the structural relationship among the factors of academic persistence intentions. Some of the research data were used, and the data were collected through an additional survey. It has been analyzed and identified in an integrated manner. The purpose of this study was to analyze the predictive variables, including academic persistence intentions, such as university image, university satisfaction, and major satisfaction, by major field. As of 2023, university students from freshman to senior or higher enrolled at a women's university in Seoul by the convenience sampling were studied. A total of 527 questionnaires were used for the final statistical analysis, excluding the questionnaires that were not available as analysis data. Excluding major satisfaction, it was found that there were the differences between groups in university image, university satisfaction, and academic persistence intentions by major field. Specifically, it could be interpreted that the subjects of the study were generally highly satisfied with the chosen major, and there was a difference between the arts and sport field and the engineering field for other variables. In order to maintain the continuity of college students' studies to the end, it is necessary to analyze them from the perspective of the university system and structure in terms of specialization of university and majors. Focusing on the university's specialization plan and mid-to long-term development plan, it is necessary to enhance the competitiveness of major, prevent dropout, and support the efforts customized to educational demanders. It would be an important basic data for each university to find the ways to overcome the practical difficulties faced by higher education institutions and devise the customized strategies. 이 연구는 대학 학업지속의향 요인들의 구조적 관계를 증명한 최진호와 장은정(2023)의 2차적 조사이다. 그 연구 자료 일부를 활용하였으며 추가 설문조사를 통해 자료를 수집하여 통합적으로 분석 파악하였다. 연구의 목적은 학업지속의향을포함하여 그 예측변인들인 대학이미지, 대학만족, 전공만족을 대학 계열별로 차이분석하는데 있다. 연구대상은 서울 지역 소재 4년제 여자대학교의 재학생들이였다. 비확률표본추출법(non-probability) 중 편의표본추출법(convenience sampling)을 이용하여 2023학년도에 등록된 1학년에서 5학년 이상을 조사대상으로 하였다. 총 527부의 설문지가 최종 통계분석을 위해 활용되었으며 분석 자료로 이용하기 불가능한 설문지는 제외시켰다. 전공만족을 제외하고는 대학이미지, 대학만족, 학업지속의향은 대학 계열별 집단 간 차이가 있는 것으로 판명되었다. 구체적으로 연구 대상자들은 선택한 전공에 대해서 대체적으로 높게 만족하는 것으로 해석될 수 있으며 그 외의 변인들에 대해서는 예체능계열과 공학계열 간의 차이가 있는 것으로 나타났다. 대학생의 학업지속을 끝까지 유지시키기 위해서는 대학과 전공의 특성화 차원에서 그 대학 제도나 구조 등의 관점에서 분석해야 한다. 그 대학의 특성화 계획과 중장기 발전계획을 중심으로 전공의 경쟁력 제고와 중도탈락 예방 전략, 그리고 교육소비자 맞춤형 지원 노력 등이 필요하다고 할 수 있다. 고등교육기관이 처해있는 현실적 난관을 극복하기 위한 방안을 대학 계열별로 모색하고 맞춤형 전략을 강구하는데 중요한 기초 자료가 될 것이다.

Studies on Anti-aging Action of Garlic, Allium sativum L. (I). Comparative Study of Garlic and Ginseng Components on Anti-aging Action

최진호,변대석,Choi, Jin-Ho,Byun, Dae-Seok 생화학분자생물학회 1986 한국생화학회지 Vol.19 No.2

강장 강정효과가 있는 것으로 구전되고 있는 마늘과 인삼성분의 생체노화억제 작용을 Harman의 유리가설을 중심으로 비교하였다. 마늘의 유효성분인 alliin (S-allyl-L-cysteine sulfoxide)과 ethanol 획분, 그리고 인삼의 중요 약러성분인 사포닌의 효과를 in vitro 및 in vivo 실험을 통하여 조사 비교하였다. 이들 성분들의 항산화활성, 유도기간 및 과산화지질생성억제효과는 각각 EDA (electron donating ability), POV (peroxide value) 및 TBA value로써 비교하였고, 과산화지질생성억제 및 분해작용과 관계가 있는 효소활성은 SOD (superoxide dismutase) 및 peroxidase activity 로써 비교하였다. in vivo 실험에서는 SD rat (male, 200 g) 11마리씩을 1군으로 하여 마늘 및 인삼성분을 매일 1회씩 4주간 경구투여 (p.o.)하여 in vitro와 같은 방법으로 측정하여 생체노화에 미치는 영향을 분석 비교하였다. in vitro에서 마늘의 ethanol 분획과 인삼사포닌은 EDA활성 및 과산화지질 생성초기의 유도기간 등에 의한 항산화활성이 거의 비슷했고, 경시적으로 측정한 TBA value는 초기단계에서는 마늘성분들이 인삼사포닌보다 효과적이였으나 6시간 이후에는 인삼사포닌이 마늘성분들보다 효과적이었다. 따라서 마늘은 속효성인데 반해 안상은 지효성을 나타내고 있었다. in vivo에서 TBA value는 혈액과 뇌에서는 인삼사포닌이, 또 간장에서는 마늘의 alliin이 효과적임을 알 수 있었다. 한편 SOD 및 peroxidase의 활성을 비교하여 보면 간장에서는 마늘성분이 인삼사포닌보다 효과적인 반면 뇌에서는 인삼사포닌이 마늘성분들보다 효과적이었다. This study was designed to compare the inhibitory effects of garlic and ginseng components on lipoperoxide formation in vitro and in vivo, and to correlate with anti-aging effect. To this end, antioxidant activity, induction period and lipoperoxide content were measured by the methods of electron donating ability (EDA), peroxide value (POV) and thiobarbituric acid (TBA) value. Also superoxide dismutase (SOD) and peroxidase activities were measured by the pyrogallol autoxidation (${\Delta}A_{420nm}/min$) and initial velocity (${\Delta}A_{436nm}/min$), respectively. Ethanol fraction and ginseng saponin showed a similar trend to the antioxidant activity and induction period in the initial stage of lipid prooxidation in vitro. From the inhibitory effects on lipoperoxide formation by the TBA value, garlic components such as alliin and ethanol fraction were more effective than ginseng saponin in the initial stage, whereas ginseng saponin was more effective than garlic components after six hours. Therefore, it is believed that garlic components are having a immediate effect, whereas ginseng saponin is having a delayed effect. In superoxide dismutase activity of in vivo, garlic components such as alliin and ethanol fraction were more effective than ginseng saponin in liver, whereas ginseng saponin was more effective than garlic components in brain. The peroxidase activity in liver was also 10 times higher than that in brain as superoxide dismutase activity. Accordingly, it is believed that the function of liver also plays an important role in anti-aging action. Also in peroxidase activity of in vivo, saponin was known as major component of ginseng was higher than garlic components in both of liver and brain, suggesting that ginseng saponin is possible to be related to psychopharmacological action. In the inhibitory effects on lipoperoxide formation of in vivo, garlic component was more effective than ginseng saponin in liver, whereas ginseng saponin was more effective than garlic component in blood.

설하선에 발생한 다발성 타석증 : 증례보고

최진호,김일규,오성섭,오남식,윤승환,Choi, Jin-Ho,Kim, Il-Kyu,Oh, Seong-Seob,Oh, Nam-Sik,Yoon, Seung-Hwan 대한악안면성형재건외과학회 1999 Maxillofacial Plastic Reconstructive Surgery Vol.21 No.2

Sialolithiasis is relatively common disease of the salivary gland in the field of Oral & Maxillofacial surgery. Obstruction of salivary secretion by a sialolith can result in swelling and pain, as well as infection of the gland. The swelling is usually correlated to meals, when salivary secretion is enhanced. Sialolithiasis occurs mainly in the submandibular gland(92%) and to a lesser degree in the parotid gland(6%). The sublingual gland and the minor salivary gland are rarely affected(2%). This is a report of rare case, the authors have experienced, within the left sublingual gland and the minor salivary glands. It is multiple sialolithiasis(about 22 silaoliths) in the sublingual and the minor salivary glands which has very low incidence of sialolithiasis. The pathosis were removed using transoral sialolithotomy with sublingual sialadenectomy.

생체 흡수성 고정판을 이용한 하악골 골절치료의 예후

최진호,김주록,하태진,유장배,김일규,Choi, Jin-Ho,Kim, Ju-Rok,Ha, Tae-Jin,Yu, Jang-Bae,Kim, Il-Kyu 대한악안면성형재건외과학회 2005 Maxillofacial Plastic Reconstructive Surgery Vol.27 No.1

The efficacy of bioresorbable fixation has recently been described in the osseosynthesis of the oral & maxillofacial region. However, a liitle data exist regarding the use of biodegradable plates and screws for the internal fixation of human mandible fractures. The purpose of this study is to analyze and compare the treatment of mandibular fractures by using a bioresorbable fixation system with conventional titanium system in human mandible fractures. eighteen patients constituted the bioresorbable fixation group and twenty-five patients constituted the titanium fixation group. Both groups underwent open reduction and internal fixation by use of a bioresorbable system or a titanium fixation system. Panoramic radiograph were obtained preoperatively, immediately postoperatively after reduction, at 6 months and at 12 months postoperatively. In the bioresorbable fixation group, complication(infection) occurred in 1 patient(5.6%) and was resolved by incision & drainage, plate removal and antibiotics without untoward sequelae. 2 patients(8.0%) experienced complications in the titanium fixation group and were treated using conservative treatment. There was no statistical difference in complication rates between two groups. Our data supported the use of bioresorbale plate fixation in mandibular fractures as a means of avoiding the potential and well documented problems with rigid titanium fixation systems. In conclusion, the bioresorbable fixation system provide a reliable and sufficient alternative to conventional titanium plate system.

동작온도에 무관한 Frequency-to-Voltage 변환 회로

최진호,유영중,Choi, Jin-Ho,Yu, Young-Jung 한국정보통신학회 2007 한국정보통신학회논문지 Vol.11 No.5

본 논문에서는 CMOS 공정을 이용하여 동작온도에 무관한 FVC(Frequency-to-Voltage Convener) 회로를 제안한다. FVC는 FLL(Frequency Locked Loop)의 핵심 회로로서 주파수 신호를 전압신호로 변환하는 회로이다. FLL 회로는 PLL(Phase-Locked Loop) 회로 같이 고정된 주파수 신호를 생성하는 회로지만, PLL과는 달리 위상비교기, charge pump, 저역 필터 등이 필요치 않아 간단히 회로를 구성할 수 있다. FVC 회로의 설계는 $0.25{\mu}m$ CMOS 공정을 이용하였다. 설계되어진 회로의 입력 주파수는 70MHz에서 140MHz를 사용하였다. 회로의 시뮬레이션 결과 동작 온도가 $0^{\circ}C$에서 $75^{\circ}C$까지 변화할 때 변환된 출력 전압의 변화는 상온에 비하여 ${\pm}2%$이내였다. In this work, temperature stable frequency-to-voltage converter is proposed. In FVC circuit input frequency is converted into output voltage signal. A FLL is similar to PLL in the way that it generates an output signal which tracks an input reference signal. A PLL is built on a phase detector, a charge pump, and a low pass filter. However, FLL does not require the use of the phase detector, the charge pump and low pass filter. The FVC is designed by using $0.25{\mu}m$ CMOS process technology. From simulation results, the variation of output voltage is less than ${\pm}2%$ in the temperature range $0^{\circ}C\;to\;75^{\circ}C$ when the input frequency is from 70MHz to 140MHz.

View Factor를 고려한 마이크로그리드 적용용 고효율 P-Type Si 양면형 태양광 모듈의 출력량 예측

최진호,김광순,차혜림,김규광,방병관,박소영,안형근,Choi, Jin Ho,Kim, David Kwangsoon,Cha, Hae Lim,Kim, Gyu Gwang,Bhang, Byeong Gwan,Park, So Young,Ahn, Hyung Keun 한국전기전자재료학회 2018 전기전자재료학회논문지 Vol.31 No.3

In this study, 20.8% of a p-type Si bifacial solar cell was used to develop a photovoltaic (PV) module to obtain the maximum power under a limited installation area. The transparent back sheet material was replaced during fabrication with a white one, which is opaque in commercial products. This is very beneficial for the generation of more electricity, owing to the additional power generation via absorption of light from the rear side. A new model is suggested herein to predict the power of the bifacial PV module by considering the backside reflections from the roof and/or environment. This model considers not only the frontside reflection, but also the nonuniformity of the backside light sources. Theoretical predictions were compared to experimental data to prove the validity of this model, the error range for which ranged from 0.32% to 8.49%. Especially, under $700W/m^2$, the error rate was as low as 2.25%. This work could provide theoretical and experimental bases for application to a distributed and microgrid network.

정상인의 비우성 상지를 이용한 교차훈련의 효과

최진호,이미영,Choi, Jin-Ho,Lee, Mi-Young 대한물리치료학회 2011 대한물리치료학회지 Vol.23 No.2

Purpose: We investigated the effects of physical practice, mental practice, and cross education using serial reaction time (SRT) in the non-dominant left arm of right-handed individuals. Methods: Subjects were divided into three groups; physical practice (n=8), mental practice (n=8) and controls (n=8). They did, respectively, physical training or mental training, or had no intervention for three weeks. Super lab 4.0 displayed four symbols on the monitor and subjects were asked to push the matching button. Reaction time was assessed pre- and post-intervention. Results: Reaction time was significantly lower after physical practice (p<0.05), but mental practice did not significantly lower reaction time? in the left hand. Also, reaction time was not significantly lower after physical practice or mental practice in the right hand. Conclusion: Physical practice can improve motor learning, but mental practice is not sufficient. Also, neither physical practice nor mental practice is sufficient for cross education from the nondominant to the dominant arm.

동시경화법으로 제조된 복합재료 조인트의 강도 및 파괴모드 연구

최진호,이대길,Choi, Jin-Ho,Lee, Dae-Gil 대한기계학회 1997 大韓機械學會論文集A Vol.21 No.3

The joint design and manufacture of the composite structure have become an important research area because the structural efficiency of the composite structure is often determined by its joint not by its basic structure. The co-cured joint is an efficient joint technique because both curing and jointing for composite structures are achieved simultaneously. In this paper, the torque capacities of the co-cured tubular lap joint with and without knurling of the pyamid type were experimentally measure. From the experimental resuts, it was found that the excess resin played a role as an adhesive in the co-cured tubular lap joint whose steel adherends were not knurled. Also, it was found that the torque capacity of the co-cured joint was increased as the knurling size of the pyramid type on the surface of the steel adherend was increased.

CMOS 공정을 이용한 온도 센서 회로의 설계

최진호,Choi, Jin-Ho 한국정보통신학회 2009 한국정보통신학회논문지 Vol.13 No.6

본 논문에서는 온도 센서 및 온도 측정을 위한 제어회로를 설계하였다. 설계된 회로는 기존의 방법들과는 달리 일반적인 CMOS(Complementary Metal Oxide Semiconductor) 공정에서 추가 공정없이 제작 가능하도록 설계하였으며, 온도는 디지털 값으로 출력 되도록 구성하였다. 설계되어진 회로는 5volts 공급전압을 사용하였으며, 0.5${\mu}m$ CMOS 공정을 사용하였다. 온도 측정을 위한 회로는 PWM(Pulse Width Modulation) 제어회로, VCO(Voltage controlled oscillator), 카운터 그리고 레지스터로 구성되어 있다. PWM 제어회로의 동작 주파수는 23kHz 이며, VCO의 동작 주파수는 416kHz, 1MHz, 2MHz를 사용하였다. 회로의 동작은 SPICE(Simulation Program with Integrated Circuit Emphasis)를 사용하여 확인 하였다. In this work, temperature sensor and control circuit for measuring temperature are proposed. The proposed circuit can be fabricated without additional CMOS fabrication process and the output of proposed circuit is digital value. The supply voltage is 5volts and the circuit is designed by using 0.5${\mu}m$ CMOS process. The circuit for measuring temperature consists of PWM control circuit, VCO, counter and register. consisted The frequency of PWM control circuit is 23kHz and the frequency of VCO is 416kHz, 1MHz and 2MHz, respectively. The circuit operation is analyzed by using SPICE.

손상 없이 영구 접착 보철물을 제거할 수 있는 cementation type 임플랜트 지대주 개발에 관한 연구

최진호,이재봉,Choi Jin-Ho,Lee Jai-Bong 대한치과보철학회 2004 대한치과보철학회지 Vol.42 No.5

Purpose: This study was peformed to investigate the retrievability of the cemented crown from the cementation type implant abutment. Material and method: The cementation type implant abutments (NEOBIOTECH implant abutment regular, 3 degree taper, 10mm length, 4mm diameter, Ti grade III, machined surface. Hwasung, Kyunggi-do) and cemented crowns were divided into 3 groups, depending on their hole angles formed in the crowns for their retrievability. The abutments and crowns were luted with 4 kinds of cements and separation test using metal wedge was executed with Instron 4465 Universal Testing Machine and the maximum impact force of the modified crown ejector was measured. Results and conclusion : 1. All of the cementation type implant abutments and cemented crowns were separated with relatively small force by metal wedge. 2. The retrieving force was minimum when the metal wedge was applied perpendicular to the axis of abutment. 3. The force for retrieving crowns from abutments was maximum in resin cement group, and reduced in orders of zinc phosphate cement, glass ionomer cement and zinc oxide eugenol cement. 4. The maximum force obtained by the crown ejector was higher than the retrieval force in ZOE and GI cement and lower than that in ZPC and resin cement. 5. If it has similar conditions clinically, the cemented crowns luted with 2 types of cements (ZOE, GI cement) can be safely retrieved from the cementation type implant abutments by the modified crown ejector.