• Mycobiology
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• 제46권4호
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• pp.407-415
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• 2018

Pheromone (PHB)-receptor (RCB) interaction in the mating pheromone response pathway of Lentinula edodes was investigated using synthetic PHBs. Functionality of the C-terminally carboxymethylated synthetic PHBs was demonstrated by concentration-dependent induction of a mating-related gene (znf2) expression and by pseudoclamp formation in a monokaryotic strain S1-11 of L. edodes. Treatment with synthetic PHBs activated the expression of homeodomain genes (HDs) residing in the A mating type locus, and of A-regulated genes, including znf2, clp1, and priA, as well as genes in the B mating type locus, including pheromone (phb) and receptor (rcb) genes. The synthetic PHBs failed to discriminate self from non-self RCBs. PHBs of the B4 mating type (B4 PHBs) were able to activate the mating pheromone response pathway in both monokaryotic S1-11 and S1-13 strains, whose B mating types were B4 (self) and B12 (non-self), respectively. The same was true for B12 PHBs in the B4 (non-self) and B12 (self) mating types. The synthetic PHBs also promoted the mating of two monokaryotic strains carrying B4-common incompatible mating types ($A5B4{\times}A1B4$). However, the dikaryon generated by this process exhibited abnormally high content of hyphal branching and frequent clamp connections and, more importantly, was found to be genetically unstable due to overexpression of mating-related genes such as clp1. Although synthetic PHBs were unable to discriminate self from non-self RCBs, they showed a higher affinity for non-self RCBs, through which the mating pheromone response pathway in non-self cells may be preferentially activated.

• 조명전기설비학회논문지
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• 제21권7호
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• pp.103-108
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• 2007

신경회로망은 많은 제어 시스템 분야에서 이용되고 있으나, 단일 궤환 신경회로망 제어기로 사용할 경우 입출력 패턴을 구하기 쉽지 않고, 부하급변 및 외란이 인가되는 경우에는 만족할만한 성능을 얻을 수 없었다. 이러한 문제를 해결하기 위해 본 논문에서는 신경회로망 출력노드의 활성화 함수 대신에 제어 대상체를 사용하는 새로운 알고리즘을 제안하였다. 결과적으로 제안된 신경회로망 자율 적응 제어 시스템은 구조가 간략화 되었으며 입출력 패턴의 문제가 해결되었고 일반적인 역전파 알고리즘을 이용하여 실시간으로 학습이 가능하게 되었다. 제안된 신경망 자율 적응 제어의 알고리즘 효과는 고속연산을 실행하는 DSP(TMS320C32)에 알고리즘을 탑재하여 A.C. 서보 모터의 속도제어에 의해서 확인하였다.

• 대한기계학회논문집A
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• 제26권2호
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• pp.349-356
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• 2002

For two kinds of 25Cr-20Ni stainless steels, STS310J1TB and STS310S with and without a small amount of Nb and N, creep behavior has been studied in a stress and temperature range from 147 to 392 MPa and from 923 to 773 K with a special reference to tertiary creep. The average creep life of STS310J1TB was about 100 times longer than that of the STS310S. The apparent activation energy for the initial creep rate was 330 kJ/mol in STS310J1TB, while that of the STS310S was 274kJ/mol in a power law creep region and 478 kJ/mol in a region of power law breakdown (PLB). The activation energy for STS310S below PLB is close to the for self-diffusion. When compensating for the temperature dependence of the Young's modulus and the omega value, it was found that the apparent activation energy for STS310J1TB was reduced to the activation energy for diffusion of chromium atom in gamma steel. The stress exponent of STS310S was about 12.3 above PLB and 5.1 in a power law creep region. Notwithstanding that the creep condition for STS310J1TB was in a power law creep region, its stress exponent was 7.9 larger than that of STS310S corresponding to the same creep conditions. This was ascribed to the presence of fine precipitates in STS310J1TB.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2001년도 추계학술대회논문집A
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• pp.117-122
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• 2001

For two kinds of 25Cr-20Ni stainless steels, SUS310J1TB TB and SUS310S with and without a small amount of Nb and N, creep behavior has been studied in a stress and temperature range from 147 to 392MPa and from 923 to 973K with a special reference to tertiary creep. The average creep life of SUS310J1TB was about 100 times longer than that of the SUS310S. The apparent activation energy for the initial creep rate was 330 kJ/mol in SUS310J1TB, while that of the SUS310S was 274 kJ/mol in a power law creep region and 478 kJ/mol in a region of power law breakdown (PLB). The activation energy for SUS310S below PLB is close to the that for self-diffusion. When compensating for the temperature dependence of the Young's modulus and the omega value, it was found that the apparent activation energy for SUS310J1TB was reduced to the activation energy for diffusion of chromium atom in a gamma steel. The stress exponent of SUS310S was about 12 above PLB and 5.1 in a power law creep region. Notwithstanding that the creep condition for SUS310J1TB was in a power law creep region, its stress exponent was 8.3 larger than that of SUS310S corresponding to the same creep conditions. This was ascribed to the presence of fine precipitates in SUS310J1TB.

• 공업화학
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• 제28권6호
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• pp.649-654
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• 2017

제주도에서 다량 발생하고 있는 폐감귤박을 활성화제로 KOH를 사용하여 활성탄을 제조하였고, 제조된 활성탄의 특성을 검토하였다. KOH 침적비율(100~300%), 활성화 온도($400{\sim}900^{\circ}C$) 및 활성화 시간(0.5~1.5 h)의 조건에서 각 조건이 증가할수록 요오드 흡착능은 증가하였으나 활성탄의 수율은 감소하였다. 그리고 활성화 시간의 경우 1.5 h 이상에서는 요오드 흡착능 및 활성탄 수율에서 비슷하였다. 또한 KOH 침적비율이 증가할수록 비표면적 및 세공부피는 증가하였으나 세공크기는 감소하였으며, 제조된 평균 세공크기는 $20{\sim}25{\AA}$이었다. KOH의 침적비율 300%, 활성화 온도 $900^{\circ}C$, 활성화 시간 1.5 h에서 제조된 활성탄은 비표면적 및 요오드 흡착능이 각각 $1,527m^2/g$ 및 1,246 mg/g으로 가장 높았다.

• 생물정신의학
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• 제21권2호
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• pp.57-64
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• 2014

Objectives The purpose of this study was to investigate the difference of brain activity between internet game overusers in adulthood and normal adults in a state of disembodiment. Methods The fMRI images were taken while the internet game overuser group (n = 14) and the control group (n = 15) were asked to perform the task composed of ball-throwing animations. The task reflected on either self-agency about ball-throwing or location of a ball. And each block was shown with either different (changing viewpoint) or same animations (fixed viewpoint). The disembodiment-related condition was the interaction between agency task and changing viewpoint. Results 1) In within-group analyses, the control group exhibited higher brain activation in the left precentral gyrus, the left inferior frontal gyrus, and the left insula. And the overuser group exhibited higher activation in the right cuneus, the left posterior middle occipital gyrus, and the left parahippocampal gyrus. 2) In between-group analyses, the control group exhibited higher activation in the right posterior superior temporal gyrus. And the overuser group exhibited higher activation in the left cuneus, and the left posterior middle occipital area. Conclusions These results show that the disembodiment-related brain activation of internet game overusers in adulthood is different from that of normal adults.

• 한국콘텐츠학회논문지
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• 제21권5호
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• pp.47-69
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• 2021

빅데이터 관련기술이 발전하면서 경영활동 전반에 데이터분석 기술이 도입되고 있다. 이에 따라, 데이터과학자는 4차 산업혁명 시대의 새로운 지식근로자로 부상하였다. 하지만 많은 기업들이 우수한 데이터과학자의 확보, 유지에 어려움을 호소하고 있는 실정이다. 일반적으로 지식근로자의 업무는 낮은 표준화 수준과 높은 모호성을 특징으로 한다. 따라서 자율적인 판단과 실행을 강조하는 셀프리더십은 지식근로자의 업무성과에 큰 영향을 미친다. 본 연구는 셀프리더십의 효과에 주목하여, 데이터과학자의 셀프리더십이 조직몰입과 이직의도를 높일 것으로 예상하고 실증분석을 수행하였다. 또한 특성 활성화 이론을 기반으로 인지된 직무자율성이 셀프리더십을 향상시키는지도 확인하였다. 분석결과 데이터과학자의 셀프리더십은 조직몰입을 통해 이직의향을 낮추는 것으로 나타났다. 그리고 이러한 매개 효과는 인지된 직무자율성에 의해 조절되는 조절된 매개효과가 존재하였다. 본 연구는 지식근로자의 셀프리더십에 대한 이론적 이해를 넓히고 기업 경쟁력과 직결된 중요한 인적자원인 데이터과학자의 관리를 위한 실무적 시사점을 제공하였다.

• 소성∙가공
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• 제17권8호
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• pp.558-563
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• 2008

The initial strain, the applied stress exponent, the activation energy, and rupture time in AZ31 magnesium alloy have been measured in order to predict the deformation mechanism and rupture life of creep over the temperature range of 423-443K. Creep tests were carried out under constant applied stress and temperature, and the lever type tester and automatic temperature controller was used for it, respectively. The experimental results showed that the applied stress exponent was about 9.74, and the activation energy for creep, 113.6KJ/mol was less than that of the self diffusion of Mg alloy including aluminum. From the results, the mechanism for creep deformation seems to be controlled by cross slip at the temperature range of 423-443K. Also the higher the applied stress and temperature, the higher the initial strain. And the rupture time for creep decreased as quadratic function with increasing the initial strain in double logarithmic axis.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2013년도 추계학술대회
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• pp.228-229
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• 2013

경제 발전과 더불어 사람들의 자기 외모에 대한 관심이 많이 증가하고 있다. 그중에 특히 여성들의 패션에 대한 관심은 매우 증가하고 있는 추세이다. 여성들의 외모에 대한 관심이 증가함으로써 여성들의 패션 마케팅에 대한 요구가 점차 증가하고 있으며, 그만큼 여성 패션 시장이 확대되어지고 있다. 이에 본 연구에서는 여성의 패션 시장을 중심으로 여성 패션에 대한 마케팅 활성화 전략에 대해 살펴보고 전략을 제시해고보가 한다. 본 연구의 여성 패션 활성화 전략을 통해서 여성패션 마케팅 시장에서 경쟁력있는 기대 효과를 얻을 수 있다.

• Industrial Engineering and Management Systems
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• 제9권4호
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• pp.312-322
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• 2010

An enterprise must achieve both a sound organizational management and effective development of individual members while maintaining a balanced approach. Relative to this, there is a research field dubbed as Organizational Activation. However, there is a necessity to clarify various factors required for organizational activation and to propose a methodology for organization management. This study is an attempt to create a model from an organization-a University Seminar Class-and agents therein-the Students and the Teacher-with an assumed goal of advancing together toward the students' self-growth. The model is expressed on two dimensional planes with vectors through a computer. Vectors are composed of the growth, demand, member, hindrance and student vectors. These vectors provide data to the mathematical model for a simulation. Each agent provided the individual information from the questionnaire-conducted to 169 university students. From the analysis data and extrapolations, this study was able to craft a guideline for future seminar activity. It also examines the possibility of assimilation of the Questionnaire Approach and that of the Computational Organization Theory approach. Finally, this study discusses the future possibility of application of the Assimilated Method for research and development, and for project management.