동요는 금물! 장기비육을 통한 고급육 생산이 우선이다

김욱,Kim, Uk 한국낙농육우협회 2007 낙농·육우 Vol.27 No.5

골프 동호인들의 운동열정과 운동몰입 및 운동지속의 관계

김욱한(Kim, Wook-Han),이봉(Yi, Bong) 한국체육과학회 2015 한국체육과학회지 Vol.24 No.1

This study was proposed to provide fundamental information for understanding psychological characteristics of club golf coterie members via verification of structural relationship among passion, commitment and adherence in the group of amateur club golfers. To attain this purpose, total 337 subjects were selected with purposive sampling of non-probability sampling method for survey, and the final 315 data were analyzed with structural equation modeling. First of all, the relation between passion and commitment showed that harmonious passion has significant effect on behavioral commitment(β=.597, p〈.001) and cognitive commitment(β=.527, p〈.001) positively, and obsessive passion has significant effect on just cognitive commitment (β=.261. p〈.001) factor positively. Second, in the relation between exercise passion and exercise adherence, only harmonious passion showed positive effect on exercise adherence(β=.261, p=023). Finally, the relation between commitment and exercise adherence displayed that both of behavioral commitment(β=.322, p〈.001) and cognitive commitment(β=.327, p〈.001) positively affected exercise adherence.

오차보정기능을 갖는 10비트 D/A 변환기

김욱,양정욱,김민규,김석기,김원찬,Kim, Ook,Yang, Jung-Wook,Kim, Min-Kyu,Kim, Suk-Ki,Kim, Won-Chan 대한전자공학회 1994 전자공학회논문지-A Vol.31 No.6

To realize high accuracy and high speed we developed a new self compensation scheme and applied it to a 10-bit D/A converter. This circuit can compensate the device mismatch without interrupting the D/A converter operation. With the compensation circuit,INA decreased down to 0.22LSB from 0.47LSB. The device was fabricated using a 0.8$\mu$m CMOS process. The area of the D/A converter core is 3.2mm$^{2}$ and the area of the compensation part is 0.64mm$^{2}$.

BCNF 릴레이션 생성에 관한 연구

김욱,한상만,송영기,Kim, Uk,Han, Sang-Man,Song, Yeong-Gi 한국전자통신연구원 1987 전자통신 Vol.9 No.3

주어진 릴레이션 스킴(relation scheme)을 이에 관련된 함수적 종속(functional dependency)들을 가지고 분해하여 Boyce-Codd 정규형(Boyce-Codd normal form)에 속하는 릴레이션 스키머(schema)로 정규화(normalization)시키는 기존의 분해 알고리즘(decomposition algorithm)은 구현해서 사용하기에 적합하지 못하다. 본 고에서는 기존의 알고리즘 구현시 발생하는 문제점을 분석하고 이런 문제점을 해결하는 방법을 제시하며, 이를 토대로 Boyce-Codd 정규형 릴레이션 스킴을 생성하는 새로운 알고리즘을 제시하고, 이 알고리즘을 UNIX 환경하에 C 언어로 구현한 후 임의의 자료를 수행하여 얻어진 릴레이션 스키머와 기존의 알고리즘에 의해 얻어진 릴레이션 스키머를 비교분석하였다.

P Element-Mediated Transformation with the rosy Gene in Drosophila melanogaster

김욱,Kim, Wook,Kidwell, Margaret G. The Korean Society for Integrative Biology 1995 동물학회지 Vol.38 No.3

D. melanogaster를 대상으로 두 종류의 P element construct, 즉 Pc[(ry+)B]와 p[(ry+)$\Delta$SX9]을 사용한 형질전환 실험을 통하여 자율적 및 비자율적인 P element construct간의 vector로써의 효율성을 분석했다. 자율적인 P element 내에 rosy 유전자를 포함하고 있는 Pc[(ry+)B] construct를 진정 M 계통형인 ry506 돌연변이 계통에 주입시켰다. 또한 비자율적인 P element 내에 rosy 유전자를 포함하고 있는 p[(ry+)$\Delta$SX9] construct와 전이효소의 공급원으로써 p-$\Delta$2-3hs$\pi$ helper plasmid를 역시 같은 계통의 ry506 돌연변이 계통에 주입시켰다. Dechorination 방법에 의해 총 1143 embryo를 대상으로 microinjection 한 결과, 모두 35 계통의 형질전환된 정상형의 눈을 가진 계통을 얻었다. P element construct를 주입시킨 전체 1143 embryo 중에서 약 20% 정도가 성체로 부화되었으며, 부화된 개체 가운데 약 40% 정도가 눈 색깔이 거의 정상형과 같은 G0 transformant 로 나타났다. 그러나 생식력을 가진 G0 transformant의 약 40% 만이 G1 transformant로 나타남으로써 모두 35 계통의 transformant를 얻었다. 따라서 G0 단계에서 나타난 형질전환 현상에는 반드시 rosy transformant의 염색체 삽입에 의해서 만이 아니라 세포질내에서도 construct내의 rosy 유전자의 발현이 가능한 것으로 분석되었다. 또한 형질전환율에 있어서는 Pc[(ry+)B]와p[(ry+)$\Delta$SX9] construct 간에 유의한 차가 없는 것으로 나타났다. 이상의 결과로 볼 때, 실험 목적에 따라 자율적인 P element 또는 helper DNA를 이용한 비자율적인 P element를 효과적인 vector 로 선택 이용함으로써 특정 유전자를 곤충집단내로 침투 및 고정시킬 수 있다고 판단된다. We have used two kinds of P element constructs, Pc[(ry+)B] and p[(ry+)$\Delta$SX9], for genetic transformation by microinjection of D. melanogaster. Pc[(ry+)B] construct carrying the rosy gene within an autonomous P element was injected into a true M strain caring the ry506. mutation. The source of transposase for microinjection and transformation was provided by a P element helper plasmid designated p-$\Delta$2-3hs$\pi$, which was co-injected with nonautonomous P[(ry+)$\Delta$SX9] construct into same ry506 M strains. A dechorination method was adopted and 35 independent transformed lines were obtained froin 1143 G0 Injected (35/1143). About 20% of the injected embryos eclosed as adults. Among G0 eclosed flies, approximately 40% exhibited eye color that was similar to wild-type (ry+), but about 60% of fertile G0 transformed lines appeared to have no G1 transformants. Therefore it is unlikely that G0 expression requires integration of the rosy transposon into chromosomes. Pc[(ry+)B] and P[(ry+)$\Delta$SX9] constructs were found to be nearly same in the frequency of element-mediated transformation. On the basis of these results, nonautonomous P elements constructs could he used as same effective vectors in P element-mediated transformation for introducing and fixing genes in insect populations.

냉각체 회전법에 의한 고순도 알루미늄 및 규소의 응고 및 정련에 관한 연구

김욱,이종기,백홍구,윤우영 ( Wook Kim,Jong Ki Lee,Hong Koo Baik,Woo Young Yoon ) 한국주조공학회 1991 한국주조공학회지 Vol.11 No.4

N/A The Purification mechanism of high purity aluminum was studied through the variation of stirring speed and coolant flow rate in the stirring method. In the stirring method the degree of purification was changed as the following factors :the variation of diffusion boundary layer thickness the variation of growth rate and the solute concentration of the residual melt. The concentration of Fe and Si was decreased as the stirring speed and the radial distance increased. In a high stirring speed of 2000rpm with unidirectional stirring mode, the uniformity of solutes was obtained. On the other hand, the purification of Si was done by the combinations of stirring method, fractional melting and acid leaching. In the case of Si purification, the centrifugal force developed in the melt acted as the significant purification factor. It was possible to obtain the purified 3N grade Si crystal after the complete elimination of residual aluminum by fractional melting and acid leaching.

정역 회전법에 의한 고순도 알루미늄의 응고 및 정련에 관한 연구

김욱,이종기,백홍구,허성강 ( Wook Kim,Joung Ki Lee,Hong Koo Baik,Seong Gang Heo ) 한국주조공학회 1992 한국주조공학회지 Vol.12 No.3

N/A The degree of purification and the macrostructure of high purity aluminium were studied through the alternate stirring method in order to improve the nonuniformity of solute concentration in the unidirectional stirring method. The 2³factorial design was done to examine the effects of experimental factors more qualitatively. In the relatively low stirring speed of 1500 rpm with alternate stirring mode, the uniform solute profile and refined grain structure were obtained due to strong washing effect and turbulent fluid flow. It was induced by the transition of the momentum boundary layer by alternation of the stirrer. It was concluded from this study that the alternate stirring mode was more effective to obtain the uniformity of solute even in the stirring speed of 1500 rpm. But the degree of purification decreased below the critical alternating period. When 2N(99.8wt.%) aluminium was used as the starting material the morphology of solid-liquid showed the cellular shape and the columnar grains were inclined to the direction of rotation. This inclined grain growth resulted from the difference of relative velocities of solid and liquid. The inclined angle was increased as the stirring speed increased and solidification proceeded. In the case of 4N aluminium, there was no inclined grain growth and it was confirmed from the macrostructure and SEM work that the morphology of solid-liquid interface was planar. From the factorial design, it was found that the alternate stirring mode showed poorer purification effect than that of unidirectional stirring mode at low speed(500 rpm). In addition, the factor that had the most significant effect on the degree of purification was the stirring speed.

군사훈련 소음이 주민들의 삶의 만족도에 미치는 영향

김욱,조영무,Kim, Wook,Cho, Young-Moo 한국콘텐츠학회 2022 한국콘텐츠학회논문지 Vol.22 No.10

이 연구는 군사훈련으로 발생하는 소음이 군사시설 주변에 거주하는 주민들의 삶의 만족도에 미치는 영향을 확인하기 위해 시행되었다. 2017년 군사시설 주변에 거주하는 성인 주민 904명을 대상으로 설문을 시행하였다. 대상자들의 삶의 만족도 점수는 총 5점 만점에 3.17점 수준으로 선행연구에 비해 낮은 수준으로 확인되었다. 삶의 만족도 영향요인을 분석하기 위해 종속변수로 삶의 만족도, 독립변수로 인구사회학적 요인과 신체적 피해 경험 요인, 그리고 정신적 피해 경험 요인을 선정하여 회귀분석한 결과 인구사회학적 요인으로는 월평균 가구소득(coef.=0.09, p<0.001), 정신적 피해 경험 요인으로는 정서불안(coef.=-0.34, p<0.001)과 스트레스(coef.=-0.05, p<0.001)가 삶의 만족도에 영향을 미치는 것으로 분석되었다. 이 연구는 군사시설 주변 지역에 거주하는 주민들의 삶의 만족도 향상을 위한 정책 수립에 기초 자료로 활용될 수 있을 것으로 기대된다.

군납, 학교급식 등 납품수요 꾸준한 가운데 공급량 부족으로 상승세

김욱,Kim, Uk 한국낙농육우협회 2015 낙농·육우 Vol.35 No.7

2017년도 육우소비 및 가격 전망

김욱,Kim, Uk 한국낙농육우협회 2017 낙농·육우 Vol.37 No.4