• 한국어업기술학회:학술대회논문집
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• 한국어업기술학회 2002년도 추계 수산관련학회 공동학술대회발표요지집
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• pp.175-176
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• 2002

Rice blast, caused by Pyricularia oryzae (P. oryzae), is generally considered to be the most serious fungal disease of rice by its widespread distribution and destructiveness (Manandhar et al., 1998). The pathogenic fungus directly penetrates into the rice plant from a cellular structure called an appressorium that is formed at the tip of the germ tube. And the fungus can attack any aerial part of the rice plant, including seeds, in which the fungus may overwinter for several years. (omitted)

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• 제8권1호
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• pp.92-100
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• 1997

뚜렛장애는 운동틱과 음성틱이 복합적으로 나타나는 만성적인 질환으로써 임상적인 특성, 동반된 행동상의 문제들에 대해 전세계적으로 많은 연구가 이루어지고 있다. 이 연구의 목적은 한국의 뚜렛장애 환자의 임상적인 특성과 동반된 행동상의 특징을 비교적 다수 환자집단을 대상으로 연구한 것이다. 연구대상은 157명의 뚜렛장애 환자로서 1988년부터 1994년까지 연세대학교 정신과 뚜렛클리닉을 방문한 환자들이었다. 진단을 위해 DSM-III-R의 진단기준을 사용하였다. 인구학적 자료, 증상, 경과 등 임상적인 특성, 가족력 및 과잉행동, 강박성, 충동성, 야뇨증, 자기파괴행동, 수면장애 등 동반된 행동상의 특징은 본 연구를 위해 고안된 반구조화된 설문지와 전반적 임상적 인상(global clinical impression)을 이용해 평가하였다. 연구결과는 다음과 같다. 환자들의 평균연령은 14.49(${\pm}7.99$)세였다. 남자가 138명(87.9%), 여자는 19명(12.1%)으로 남녀의 성비가 약 7：1의 비율로 남자가 많았다. 133명(84.7%)은 오른손잡이였고 24명(15.3%)은 양손잡이거나 왼손잡이였다. 평균발병연령은 8.85(${\pm}4.56$)세였고 발병연령의 범위는 2세에서 16세였다. 반수 이상의 환자가 6세에서 10세 사이에 발병하는 양상을 보였다. 발명연령에 있어 두번의 높은 발병빈도가 관찰되었는데 처음에는 6세경에 높은 양상을 보였고 이후 10세 무렵에 다시 한번 높은 발병빈도가 관찰되었다. 이러한 경향은 남녀간에 공통적이었다. 처음 증상중 가장 흔한 것은 눈깜박임으로 55% 이상의 환자에서 나타났다. 다음으로는 고개 돌리기, 음성틱 등이었다. 환자들이 발병후 내원할 때까지 보였던 모든 틱증상의 빈도를 보면 전체 환자중 129명(82.2%)에서 눈깜박임이 있었고 91명(57.9%)이 고개짓, 83명(52.7%)이 어깨 움추리기 혹은 돌리기, 51명(32.6%)이 팔흔들기가 있었다. 101명(64.3%)은 증상이 신체의 상부에서 하부로 향했고 25명(15.9%)은 신체의 하부에서 상부로 증상이 진행하는 양상을 보였다. 나머지는 음성틱과 고개돌리기가 비슷한 시기에 나타나는 등 증상의 진행방향에서 상향성 혹은 하향성을 정하기 어려운 환자들이었다. 환자의 아버지중 19명(12%)이 강박장애의 병력이 있었고 17명(10.6%)은 틱장애의 병력이 있었다. 반면, 환자의 어머니중 7명(4.5%)이 강박장애의 병력이 있었고 4명(2.5%)은 틱장애의 병력이 있었다. 환자중 118명(75.1%)에서 과잉행동이 동반되었고 95명(60.5%)에서 강박증상이 동반되었고 55명(35.0%)에서 자기파괴적인 행동이 있었으며 46명(29.3%)에서 충동성이 동반되었고 35명(22.3%)에서 유뇨증이 관찰되었다. 환자의 발병연령과 내원시 연령, 병의 이병 기간, 강박증상의 정도 사이에 통계적으로 유의한 양성의 상관관계가 있었고 과잉행동성과 음성의 상관관계가 있었다. 과잉행동성과 충동성, 강박성, 야뇨증, 자기파괴적 행동사이에 통계적으로 유의한 양성의 상관관계가 있었다. 환자의 강박증상의 정도와 과잉행동성, 수면장애, 자기파괴적 행동 사이에 통계적으로 유의한 양성의 상관관계가 있었다. 본 연구 결과 저자들은 외래에 내원한 뚜렛장애 환자의 임상적 특성이나 동반된 행동상 문제들이 이전 연구와 크게 상이하지 않음을 확인할 수 있었으며 발병연령이 어릴수록 과잉행동성이 심했으며 발병연령이 늦을수록 강박성이 심했다. 과잉행동성과 충동성, 강박성, 야뇨증, 자기파괴적 행동 등은 상호 높은 관련성이 있었다.

• 한국전기전자재료학회논문지
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• 제11권5호
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• pp.371-377
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• 1998

The plasma chemical vapor deposition is one of the most utilized techniques for the diamond growth. As the applications of diamond thin films prepared by plasma chemical vapor deposition(CVD) techniques become more demanding, improved fine-tuning and control of the process are required. The important parameters in diamond film deposition include the substrate temperature, $CO/H_2$gas flow ratio, total gas pressure, and gas excitation power. With the spectroscopic ellipsometry, the substrate temperature as well as the various parameters of the film can be determined without the physical contact and the destructiveness under the extreme environment associated with the diamond film deposition. Through this paper, the important parameters during the diamond film growth using $CO+H_2$are determined and it is shown that $sp^2$ C in the diamond film is greatly reduced.

• Earthquakes and Structures
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• 제10권6호
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• pp.1315-1330
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• 2016

This study investigates ground motion parameters and their damage potential for building type structures. It focuses on low and mid-rise reinforced concrete buildings that are important portion of the existing building stock under seismic risk in many countries. Correlations of 19 parameters of 466 earthquake records with nonlinear displacement demands of 1056 Single Degree of Freedom (SDOF) systems are investigated. Properties of SDOF systems are established to represent RC building construction practice. The correlation of damage and ground motion characteristics is examined with respect to number of story and site classes. Equations for average nonlinear displacement demands of considered RC buildings are given for some of the ground motion parameters. Velocity related parameters are generally found to have better results than the acceleration, displacement and frequency related ones. Correlation of the parameters may be expected to decrease with increasing intensity of seismic event. Velocity Spectrum Intensity and Peak Ground Velocity have been found to have the highest correlation values for almost all site classes and number of story groups. Common parameter of Peak Ground Acceleration has lower correlation with damage when compared to them and some other parameters like Effective Design Acceleration and Characteristic Intensity.

• Geomechanics and Engineering
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• 제33권3호
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• pp.261-269
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• 2023

In this study, the compressive strength of cement stabilized soil was predicted using the electrical resistivity measurement. The effects of the water to cement (w/c) ratio and recovered Carbon Black (rCB) contents were examined. A series of electrical resistivity and compressive strength tests were conducted on two types of stabilized soil after 28 days of curing. Multiple nonlinear regression (MNLR) analysis was used to evaluate the relationship between the compressive strength and the electrical resistivity in terms of the rCB, C_u (uniformity coefficient), and w/c ratio. The results showed that the w/c ratio and C_u have a strong influence on the compressive strength and electrical resistivity of the cement stabilized soil compared to the rCB content. The use of a small amount of rCB led to a decrease in the void space in the specimen and was attributed to the increase strength and decrease electrical resistivity. A high w/c ratio also induced a low electrical resistivity and compressive strength, whereas 3% rCB in the cemented soil provided the optimum strength for all w/c ratios. Finally, a prediction equation for the compressive strength using the electrical resistivity measurement was suggested based on its reliability, time effectiveness, non-destructiveness, and cost-effectiveness.

• 한국환경과학회지
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• 제31권2호
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• pp.131-139
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• 2022

This study aimed to evaluate the effects of four types of environmental enrichment on the improvement of companion dogs' behavioral problems due to separation anxiety. A total of 21 dogs of various breeds were included in the study. Data were collected to investigate the behaviors associated with anxiety in dogs, including vocalization, elimination, escape attempts, and destructiveness. A first stage, in which the dog and owner were together (P0), lasted 15 min, and a second stage, in which the dog and owner were separated (P1), lasted 15 min. After the dog and owner were separated (P1), the third stage (P2), during which the environment was enriched, lasted 20 min, and the fourth stage, following environment enrichment (P3), lasted 15 min. The results of the study indicated that compared to P0, the frequency of problematic behavior was highest during the 15 min following separation from the owner (P1). Following environmental enrichment, the average frequency of problematic behaviors in P2 decreased (P < 0.001) compared to P1. Environmental enrichment can also be used appropriately in the case of companion dogs, including shelter dogs or experimental dogs that use a limited kennel, and is a particularly effective means of improving the quality of life of dogs.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• 제8권2호
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• pp.287-297
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• 1997

품행장애의 아형분류는 사회화및 공격성여부, 발병의 시기등을 기준으로 이루어져왔다. ICD- 10 에서는 이러한 구분이외에 품행문제를 보이는 상황에 따라 가정에 국한된 품행장애라는 아형을 두고 있다. 저자들은 부모 및 형제에 대한 공격적인 행동 및 분노발작, 가정내의 기물파손등의 행동문제를 보이나 가정 이외의 장소에서는 뚜렷한 행동문제를 나타내지 않는 아동의 증례를 경험하였다. 자세한 병력청취 및 입원후 의 관찰 및 치료를 통해 환아의 부모에 의한 만성적인 방임 및 학대, 일관성 없는 양육태도등으로 인한 애착 형성의 문제가 환아의 행동문제 및 감정적인 어려움에 크게 기여함을 알 수 있었다. 이에 학대및 애착형성의 장애등의 부모-자녀관계의 병리가 품행장애와 어떤 상관관계를 갖는가를 알아보았고 치료적 제안에 대해 고찰하였다.

• 한국결정성장학회지
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• 제8권2호
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• pp.240-248
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• 1998

화학기상증착 방법에 의한 다결정 다이아몬드 박막성장을 위한 공정가운데 가장 많이 사용되는 기법중의 하나가 바로 플라즈마에 의한 방법이다. 특히 플라즈마 화학기상증착(Plasma-Enhanced CVD)기술에 의한 다이아몬드 박막응용은 그 공정에 대한 세부 조정을 통하여 더욱 향상시킬 수 있다. 다이아몬드 박막증착의 경우 중요 변수들은 다이아몬드 필름이 증착되는 기판(substrate)의 온도, $CH_4/H_2$가스비율, 전체가스 압력 및 가스 excitation에너지 등이다. 분광 ellipsometry는 다이아몬드 필름 증착과 관련된 극단적인 환경에서도 물리적인 접촉이나 만들어지는 샘플의 손상없이도 필름자체의 여러 성질뿐만 아니라 기초 샘플의 온도까지도 결정할 수 있는 좋은 방법이다. 이러한 장점들을 이용하여 양질의 다이아몬드 박막을 성장시키기 위한 조건과 그에 따른 박막 특성을 얻기 위하여 분광 ellipsomerry의 사용과 해석이 소개된다. 그리고, 분광 ellipsometry를 이용, 플라즈마 화학기상증착 기술에 의하여 성장되는 다이아몬드 박막으로부터 나타나는 중요 변수들이 결정될 것이며 이러한 변수들은 필름의 두께, 필름에 포함되는 void 및 비다이아몬드의 체적비와, 그들의 시간에 따른 변화등을 포함한다. 그리고 샘플이 원하는 두께까지 성장된 후에 라만 분광기로 측정되어 다이아몬드 성분을 확인한다.

• 센서학회지
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• 제31권4호
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• pp.249-254
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• 2022

To achieve high-performance colloidal quantum dot light-emitting diodes (QD-LEDs), the use of a densely packed QD film is crucial to prevent the formation of leakage current pathways and increase in interface resistance. Spin coating is the most common method to deposit QDs; however, this method often produces pinholes that can act as short-circuit paths within devices. Since state-of-the-art QD-LEDs typically employ mono- or bi-layer QDs as an emissive layer because of their low conductivities, the use of a densely packed and pinhole-free QD film is essential. Herein, we introduce the Langmuir-Blodgett (LB) technique as a deposition method for the fabricate densely packed QD films in QD-LEDs. The LB technique successfully transfers a highly dense monolayer of QDs onto the substrate, and multilayer deposition is performed by repeating the transfer process. To validate the comparability of the LB technique with the standard QD-LED fabrication process, we fabricate and compare the performance of LB-based QD-LEDs to that of the spin-coating-based device. Owing to the non-destructiveness of the LB technique, the electroluminescence efficiency of the LB-based QD-LEDs is similar to that of the standard spin coating-based device. Thus, the LB technique is promising for use in optoelectronic applications.

• 유통과학연구
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• 제13권7호
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• pp.63-71
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• 2015

Purpose - The characteristics of the modern management environment in Korea clearly involve the limitations of knowledge management, globalization, changes in industrial structures, polarization of the economy, consumption, and education, and the demand for creative management. To achieve a continuous competitive advantage for individuals as well as organizations, Wisdom Management can be said to be a paradigm for the current environment. The Research is an alternative to environmental management in the early study of the need to conceptualize the theoretical approach to wisdom management. In other words, it presents a new management paradigm for a business environment of uncertainty and unpredictability. Furthermore, it aims to propose Wisdom Management as an alternative in the modern management environment as well as a topic of discourse. Its purpose is to provide basic knowledge to people who study and practice in this field to strengthen the competitiveness of individuals and companies. Research design, data, and methodology - This paper first provides six characteristics of the current management environment at home and abroad. It then attempts to emphasize the necessity of wisdom based on such characteristics by classifying wisdom according to recent management study research. This allows the derivation of definitions of wisdom management, suggesting its components and properties. Results - The six characteristics of the modern business environment are: 1) limits of knowledge, 2) intensifying globalized competition, 3) changes in industry structure - IoT (Internet of all Things) trend, 4) serious polarization and social unrest diffusion, 5) personal and organizational competitiveness creativity requirements, and 6) domestic special national and social situations. Therefore, accordingly, wisdom can be defined and classified as: wisdom that offers potential integration beyond knowledge, practicing and maintaining knowledge wisdom as an efficient strategy for an organization wisdom as a decision-making process that addresses ambivalence wisdom as the pursuit of common goods based on ethics; and, wisdom as creativity that involves intuition and insight. This paper attempts to define Wisdom Management in accordance with these definitions of wisdom. Wisdom Management is a management system that is awareof the current environment given in the multidimensional perspective, achieves the efficiency of the organization and the goals of common good through an uncertain decision-making process, based on the organization of individual and organizational knowledge, and the internal experiences and resources. Wisdom Management components include human beings, virtue, knowledge, creativity, and ambivalent thinking. Its properties include intentionality, self-destructiveness, creative and ethical reflexivity, complexity, insight, unpredictability, ambivalence, and wholeness. Conclusions - Since all organizations face the limitations of their environment, crises, and opportunities, applying wisdom in management to develop as Wisdom Management can be an inevitable alternative to the uncertainties of the management environment faced by modern society. The conceptualization of Wisdom Management forms a valuable context to further advance knowledge management theory into practice. It is also a cornerstone of strategic management and can provide insight into its potential for success and implementation.