댄스스포츠 선수들을 통한 자기관리, 파트너십, 참여만족의 관계

최진호(Choi, Jin-Ho),박채희(HoㆍPark, Chae-Hee) 한국웰니스학회 2015 한국웰니스학회지 Vol.10 No.3

이 연구는 댄스스포츠 선수의 자기관리, 파트너십, 참여만족 사이의 상호작용을 조사하는 데 목적이 있다. 대한댄스스포츠경기연맹에 등록된 244명 선수들을 연구대상으로 하였으며, Amos를 이용하여 제안된 연구모형을 위해 구조방정식과 브트스트랩핑을분석하였다. 종합적인 결론으로, 댄스스포츠 선수의 몸관리, 대인관리, 훈련관리는 선수 간의 파트너십에 긍정적인 영향을 미쳤다. 선수의 참여만족에는 몸관리, 대인관리, 훈련관리 모두 영향을 미치지 않는 것으로 나타났다. 선수 간의 파트너십은 댄스스포츠참여만족에 긍정적인 영향을 미치는 것으로 나타났다. 마지막으로, 선수 간의 파트너십은 선수의 몸관리, 대인관리, 훈련관리와 참여만족 사이에서 완전매개의 역할을 하였다. The purpose of this study was to examine the influence of self-management and partnership on satisfaction of participating. Data were collected from 274 dancesport players registered in Korean Federation of Dancesport(KFD). Structural equation modeling indicated that while physical management, training management, and interpersonal management of self-management had a positive effect on partnership, all they didn't have an impact on satisfaction of participating. Furthermore, partnership positively affected satisfaction of participating. All estimated paths for the indirect effect were statistically significant, while the estimates of the direct effect from physical management, training management, and interpersonal management to satisfaction of participating were not significant. Therefore, potentially, partnership fully mediated the paths between physical management, training management, and interpersonal management and satisfaction of participating.

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.

텅스텐 할로겐 램프를 사용하는 ZMR공정의 매개변수 최적화에 관한 연구

최진호,송호준,이호준,김충기,Choi, Jin-Ho,Song, Ho-Jun,Lee, Ho-Jun,Kim, Choong-Ki 한국재료학회 1992 한국재료학회지 Vol.2 No.3

Some solutions to several major problems in ZMR such as agglomeration of polysilicon, slips and local substrate melting are described. Experiments are performed with varying polysilicon thickness and capping oxide thickness. The aggmeration can be eliminated when nitrogen is introduced at the capping oxide layer-to-polysilicon interface and polysilicon-to-buried oxide layer interface by annealing the SOI samples at $1100^{\circ}$ in $NH_3$ ambient for three hours. The slips and local substrate melting are removed when the back surface of silicon substrate is sandblasted to produce the back surface roughness of about $20{\mu}m$. The subboundary spacing increases with increasing polysilicon thickness and the uniformity of recrystallized SOI film thickness improves with increasing capping oxide thickness, improving the quality of recrystallized SOI film. When the polysilicon thickness is about $1.0{\mu}m$ and the capping oxide thickness is $2.5{\mu}m$, the thickness variation of the recrystallized SOI film is about ${\pm}200{\AA}$ and the subboundary spacing is about $70-120{\mu}m$.

담수어의 지질에 관한 연구 8. 천연 및 양식 잉어와 이스라엘 잉어의 지질성분 비교

최진호,임채환,배태진,윤태헌,이강호,CHOI Jin-Ho,RHIM Chae-Hwan,BAE Tae-Jin,YOON Tai-Heon,LEE Kang-Ho 한국수산과학회 1985 한국수산과학회지 Vol.18 No.5

양식 잉어의 품질을 지질성분면에서 평가하기 위하여 천연 및 양식 잉어의 지질 조성 및 이들 지질의 구성지방산을 분석${\cdot}$비교하였고, 이스라엘 잉어의 지질성분과도 비교하였다. 또 양식 잉어 및 이스라엘 잉어의 지방산과 사료 지방산을 분석${\cdot}$비교한 결과는 다음과 같다. 1. 총지질 함량은 양식 잉어가 천연 잉어보다는 약간 낮은 반면 이스라엘 잉어와는 거의 비슷하였다. 부위별로는 천연 및 양식 잉어는 내장부가 가식부보다 총지질이 2배 이상 높았으나, 이스라엘 잉어는 가식부와 내장부가 거의 비슷하였다. 2. 천연 및 양식 잉어와 이스라엘 잉어의 지질 조성은 거의 비슷한 경향을 나타내고 있었다. 즉 중성지질이 대부분을 차지하고 당지질과 인지질은 아주 적었다. 또 부위별 지질 조성을 비교해 보면 중성지질의 함량은 천연 잉어의 경우는 내장부가 가식부보다 많은 반면 양식 잉어와 이스라엘 잉어는 그 반대였다. 가식부의 당지질과 인지질 함량은 양식 잉어의 경우는 당지질이 인지질보다 많은 반면 이스라엘 잉어는 인지질이 당지질보다 많았다. 또 중성지질은 TG의 함량이 가장 많았으며 인지질은 PC와 PE가 가장 많았다. 3. 가식부의 중성지질의 중요 구성지방산 함량은 $C_{18:1},\;C_{18:2},\;C_{18:3},\;C_{22:5},\;C_{22:6}$산은 양식 잉어가 천연 잉어보다 높은 반면, $C_{16:0},\;C_{18:0},\;C_{16:1},\;C_{20:4},\;C_{20:5}$산은 천연 잉어가 양식 잉어보다 높았다. 이스라엘잉어의 경우에는 $C_{18:2}$산의 함량이 천연 및 양식 잉어에 비해 상당히 높게 나타났다. 인지질의 경우는 $C_{18:0},\;C_{18:1},\;C_{18:2},\;C_{18:3},\;_C{22:6}$산은 양식산이 천연산보다 많은 반면 $C_{16:0},\;C_{16:1},\;C_{20:4},\;C_{20:5},\;C_{22:5}$산은 천연산이 양식산보다 높았다. 4. 중성지질의 불포화도(TUFA/TSFA)는 양식산이 천연산보다 약간 높았으며, 또 이스라엘 잉어는 양식 잉어보다도 약간 더 높았다. 인지질의 경우도 이스라엘 잉어>양식 잉어>천연 잉어의 순이었다. 필수지방산 함량(TEFA)은 중성지질의 경우 가식부는 양식 잉어가 천연 잉어보다 높은 반면 내장부는 천연 잉어가 양식 잉어보다 높았다. 인지질의 경우는 가식부에서 이스라엘 잉어가 천연 및 양식 잉어보다 약간 더 높고, 또 천연 잉어가 양식 잉어보다 높았다. 5. w3고도불포화지방산 함량 (w3 HUFA)은 중성지질의 경우는 필수지방산 함량의 경향과 거의 비슷하였고 인지질의 경우는 이스라엘 잉어가 가장 높고, 양식 잉어, 천연 잉어의 순이었다. 6. 사료 지방산(C)에 대한 양식 잉어의 지방산(A)의 비(A/C) 및 이스라엘 잉어의 지방산(B)의 비(B/C)를 비교하여 보면 양식 잉어는 $C_{20:5}\;w3(0.12),\;C_{22:5}\;w6(0.53),\;C_{22:5}\;w3(0.68),\;C_{22:6}\;w3(0.26)$산이 아주 낮았고, 이스라엘 잉어는 $C_{18:3}\;w3(0.61),\;C_{20:5}\;w3(0.11),\;C_{22:4}\;w6(0.16),\;C_{22:5}\;w6(0.07),\;C_{22:6}\;w3(1.53)$산이 아주 낮게 나타났다. 따라서 주로 이들 w3고도불포화지방산들이 polyene산의 생합성 및 성장률에 깊이 관계할 가능성이 있다고 판단되었다. As a part of serial study for comparing lipid components in freshwater fishes, this work was undertaken to compare the lipid components among wild and cultured carp, Cyprinus carpio, and Israeli carp, Cyprinus carpio nudus. The lipid components of cultured carp were analyzed and compared with those of wild and Israeli carp. In the content of total lipid, the lipid content in cultured carp was slightly lower than that in wild one, but similar to that in Israeli carp. The lipid contents in viscera of wild and cultured carp were 2 times higher than those in edible portion, but the lipid content in viscera of Israeli carp showed a similar trend to that in edible portion. In the fatty acid composition of neutral lipid in edible portion, percentages of $C_{18:1},\;C_{18:2},\;C_{18:3},\;C_{22:5}\;and\;C_{22:6}$ in cultured carp wire higher than those in wild one, while percentages of $C_{16:0},\;C_{18:0},\;C_{16:1},\;C_{20:4}\;and\;C_{20:5}$ lower, and percentage of $C_{18:2}$ in Israeli carp was noticeably higher than that in wild and cultured carp. In the case of phospholipid in edible portion, percentages of $C_{18:0},\;C_{18:1},\;C_{18:2},\;C_{18:3}\;and\;_C{22:6}$ in cultured carp were higher than those in wild one, while percentages of $C_{16:0},\;C_{16:1},\;C_{20:4},\;C_{20:5}\;and\;C_{22:5}$ lower. The unsaturation (TUFA/TSFA) of neutral lipid in cultured carp was slightly higher than that in wild one, but slightly lower than that in Israeli carp. In the case of phospholipid, the unsaturation showed a similar trend to that of neutral lipid. The essential fatty acid content(TEFA) of neutral lipid in edible portion of cultured carp was higher than that of wild one, but that in viscera lower. In the case of phospholipid in edible portion, the essential fatty acid content in Israeli carp was slightly higher than that in wild and cultured carp, and that in wild one was higher than that in cultured one. The w3 highly unsaturated fatty acid contents(w3 HUFA) of neutral lipid almost showed a similar trend to the essential fatty acid contents in wild and cultured carp, and Israeli carp. In the case of phospholipid, the w3 HUFA in Israeli carp was considerably higher than those in cultured and wild carp. In the ratio (A/C) of fatty acid content(A) in cultured carp to that(C) in diet, the A/C ratios of $C_{20:5}\;w3(0.12),\;C_{22:5}\;w6(0.53),\;C_{22:5}\;w3(0.68)\;and\;C_{22:6}\;w3(0.26)$ were much lower and in the ratio (B/C) of fatty acid content (B) in Israeli carp, the B/C ratios of $C_{18:3}\;w3(0.61),\;C_{20:5}\;w3(0.11),\;C_{22:4}\;w6(0.16),\;C_{22:5}\;w6(0.07)\;and\;C_{22:6}\;w3(0.79)$ were also lower than the other fatty acid. Consequently, it is considered that the ratios of w3 HUFA is related to the biosynthesis of polyenoic acid and growth rates of cultured and Israeli carp.

Ni계 Deloro 50합금의 고하중 Sliding 마모거동에 미치는 마모환경의 영향

최진호,최세종,김준기,김용덕,김학수,문주현,백하충,이덕현,김선진,Choi, Jin-Ho,Choi, Se-Jong,Kim, Jun-Gi,Kim, Yong-Deog,Kim, Hak-Soo,Mun, Ju-Hyun,Baek, Ha-Chung,Lee, Duck-Hyun,Kim, Seon-Jin 한국재료학회 1998 한국재료학회지 Vol.8 No.12

The sliding wear behavior of Ni-base hardfacing alloy, Deloro 50, was investigated at the contact stresses of 15ksi and 30ksi under the various wear environments. In air at room temperature, Deloro 50 showed lower wear resistance than Stellite 6 even at 15ksi due to the occurrence of severe adhesive wear. This seems to be caused by the lower hardness and work- hardening rate of Deloro 50 than those of Stellite 6. In water at room temperature, Deloro 50 showed as good wear resistance as Stellite 6 at 15ksi. It was considered to be due to that water could effectively prevent metal to metal contact through contacting asperities. However, Deloro 50 showed severe adhesive wear at 30ksi in water at room temperature. It seems to be that the water could not suppress adhesion wear at 30ksi. At $300^{\circ}C$ in air, Deloro 50 exhibited higher wear resistance than Stellite 6 even at 30ksi. It was considered that the oxide glaze layers formed on wear surface during sliding, effectively prevented direct metal-to-metal contacts.

수확시기에 따른 '원황' 배 과실의 품질과 과심갈변에 미치는 영향

최진호,임순희,김성종,이한찬,권용희,박용서,정석규,최현석,Choi, Jin-Ho,Yim, Sun-Hee,Kim, Sung-Jong,Lee, Han-Chan,Kwon, Yong-Hee,Park, Yong-Seo,Jung, Seok-Kyu,Choi, Hyun-Sug 한국유기농업학회 2015 한국유기농업학회지 Vol.23 No.1

This study was conducted on how the harvest time affect fruit quality, core breakdown, and taste of GA-pasted 'Wonhwang' pear (Pyrus pyrifolia Nakai) fruit in order to verify the optimum harvest time. Harvest time included 110, 115, 120, 125, 130 days after full bloom (DAFB). Delayed fruit harvest increased fruit weight and content of soluble solids but decreased firmness, titratable acidity, and starch content. Harvest at 130 DAFB severely reduced fruit firmness and increased fruit core breakdown for 21 days at room storage, while harvest at 115 DAFB showed the opposite result of the fruit firmness and breakdown. Delayed fruit harvest reduced fruit taste, regardless of GA pasting on fruit. GA-pasted fruit showed reduced taste in advance compared to those of non GA-pasted fruit, regardless of the harvest time. Harvest at 120 DAFB would be suitable to maintain fruit quality and reduce core breakdown.

GOSAT 기반의 동북아시아 CO₂ 분포도에 적용된 크리깅 기법의 비교평가

최진호,엄정섭,Choi, Jin Ho,Um, Jung-Sup 한국환경영향평가학회 2011 환경영향평가 Vol.20 No.6

The GOSAT (Greenhouse gases Observing SATellite) data provide new opportunities the most regionally complete and up-to-date assessment of $CO_2$. However, in practice, GOSAT records often suffer from missing data values mainly due to unfavorable meteorological condition in specific time periods of data acquisition. The aim of this research was to identify optimal spatial interpolation techniques to ensure the continuity of $CO_2$ from samples taken in the North East Asia. The accuracy among ordinary kriging (OK), universal kriging (UK) and simple kriging (SK) was compared based on the combined consideration of $R^2$ values, Root Mean Square Error (RMSE), Mean Error (ME) for variogram models. Cross validation for 1312 random sampling points indicate that the (UK) kriging is the best geostatistical method for spatial predictions of $CO_2$ in the East Asia region. The results from this study can be useful for selecting optimal kriging algorithm to produce $CO_2$ map of various landscapes. Also, data users may benefit from a statistical approach that would allow them to better understand the uncertainty and limitations of the GOSAT sample data.

MOSFET의 특성변화에 따른RF 전력증폭기의 신뢰성 특성 분석

최진호,Choi, Jin-Ho 한국정보통신학회 2007 한국정보통신학회논문지 Vol.11 No.1

MOSFET 트랜지스터의 전기적인 특성 변화에 따른 Class-E RF 전력 증폭기의 신뢰성 특성을 분석하였다. Class-E 전력 증폭기에서 MOSFET는 높은 효율을 얻기 위해 스위치로 동작하며, 이로 인해 MOSFET가 off 되었을 때 드레인 단자에 높은 전압 신호가 발생한다. 회로가 동작함에 따라 높은 전압의 스트레스로 인하여 MOSFET의 문턱 전압은 증가하고 전자의 이동도는 감소하여 MOSFET의 드레인 전류는 감소하게 된다. Class-E 전력 증폭기에서 MOSFET의 전류가 감소하면 전력 효율 및 출력 전력은 감소하게 된다. 그러나 class-E 전력증폭기에서 작은 부하 인덕터를 사용할 경우 큰 인덕터를 사용하는 경우에 비 해 신뢰성 특성을 향상시킬 수 있다. 1mH의 부하 인덕터를 사용한 경우 $10^{7}$초 후에 드레인 전류는 46.3%가 감소하였으며, 전력 효율은 58%에서 36%로 감소하였다. 그러나 1nH의 부하 인덕터를 사용한 경우 드레인 전류는 8.89%, 전력 효율 59%에서 55%로 감소하여 우수한 신뢰성 특성을 보여주었다. The reliability characteristics of class-E RF power amplifier are studied, based on the degradation of MOSFET electrical characteristics. The class-E power amplifier operates as a switch mode operation to achieve high efficiency. This operation leads to high voltage stress when MOSFET switch is turned-off. The increase in threshold voltage and decrease in nobility caused by high voltage stress leads to a drop in the drain current. In the class-E power amplifier the effects caused by the degradation of MOSFET drain current is a drop of the power efficiency and output power. But the small inductor in the class-E load network allows the reliability to be improved. After $10^{7}\;sec$. the drain current decreases 46.3% and the PAE(Power Added Efficiency) decreases from 58% to 36% when the load inductor is 1mH. But when the load inductor is 1nH the drain current decreases 8.89% and the PAE decreases from 59% to 55%.

계란의 내용물과 난각의 특성에 관한 연구

최진호,강원준,백동훈,박홍석 ( Jin Ho Choi,Won Joon Kang,Dong Hoon Baik,Hong Suk Park ) 한국축산학회 1983 한국축산학회지 Vol.25 No.6

A total of 999 eggs, randomly collected from a flock of 2,000 hens of White Shaver strain that had been in production for seven months was tested to investigate interrelationships between egg weight and weight of each fraction of egg and between egg weight and shell quality. Egg weight, weights of yolk, albumen and shell, specific gravity of egg and sheaf thickness were measured for each egg. Percentages of fraction weights out of egg weight were calculated and designated respectively as % yolk, % albumen and % shell. Correlations were also investigated among four parameters involved in shell quality. Following results were obtained. 1. Mean (±SD) weight of total eggs tested was 58.72±4.80 g. and mean weights of fractions were 17.08 g. for the yolk, 35.22 g. for the albumen and 5.21 g. for the shell which were equivalent to approximately 30, 60 and 9% respectively of egg weight. 2. Correlation coefficients of egg weight were 0.89 with albumen weight, 0.54 with yolk weight and 0.53 with shell weight, indicating that variation in egg weight was mainly due to variation in albumen weight and egg weight was less influenced by yolk and shell weights. 3. As egg weight decreased weights of all three fractions also decreased. However, the pace of changing was much greater in albumen weight than in yolk weight, resulting in that % yolk increased as egg weight decreased. 4. There were found positive correlations between egg weight and both shell thickness and egg specific gravity, indicating that as egg size decreased shell quality decreased. 5. High correlation coefficients were observed between any pair of four parameters of shell quality measured, which were shell weight, % shell, shell thickness and egg specific gravity.

봉지종류와 수확시기가 '추황배'의 수상에서의 과피흑변과 과실품질에 미치는 영향

최진호,임순희,김성종,권용희,이한찬,정석규,최현석,Choi, Jin-Ho,Yim, Sun-Hee,Kim, Sung-Jong,Kwon, Yong-Hee,Lee, Han-Chan,Jung, Seok-Kyu,Choi, Hyun-Sug 한국유기농업학회 2015 한국유기농업학회지 Vol.23 No.1

'Chuhwangbae' pears (Pyrus pyrifolia Nakai) were investigated on how types of paper bag and harvesting dates influenced on skin blackening before harvest as well as fruit quality after harvest. Experiments included four different types of paper bags (NP/YP, GP/YP, NP/BP, and NP/RP) and five different harvesting dates [160, 170, 180, 190, and 200 days after full bloom (DAFB)]. NP/YP and GP/YP indicated for newspaper- and gray paper-outer bag, respectively, with yellow paper-inner bag of the both. NP/BP and NP/RP indicated for newspaper-outer bag of the both with black paper- and red paper-inner bag, respectively. The NP/YP (newspaper/yellow paper) showed high absorbance and air and water vapor permeability in the bags, while the NP/RP (newspaper/red paper) resulted in poor physical properties in the bags. Fruit enclosed with NP/YP resulted in the absence of skin blackening, but fruit with NP/RP bags had the highest skin blackening (12.7%). Occurrence of skin blackening was concentrated on the middle and calyx end-part of fruit region. NP/RP bag treatment was likely to increase fruit weight, firmness, titratable acidity, and fruit surface color. Harvest at high relative humidity in air increased skin blackening of fruit. Later fruit harvest, such as 190 and 200 DAFB, increased skin blackening, fruit weight, and sugar content while decreasing fruit firmness and titratable acidity.