• 아동학회지
• /
• 제12권1호
• /
• pp.38-51
• /
• 1991

This study investigated (1) the relation of aggressiveness to the outcome of conflict, intentional attribution, predicted response, and (2) friendship as a variable affecting intentional attribution and predicted response. The subjects are 78 fifth grade boys selected from a public elementary school located in Seoul. The children were individually tested by the researcher who read the items to the child. Dodge and Somberg's aggression questionnaire and Dodge and Frame's conflict outcome of ambiguosly intended stories were modified for use in this study. The instigator of aggression in the stories was classified as friend or non-friend and aggressive non-friend or nonaggressive non-friend. Two-way analyses of variance involving one between-subjects factor (aggression of subject) and one within-subjects factor (instigator combination) were performed on children's responses to three of the scales (hostile, neutral, positive). The results show that (1) there were differences in intentional attribution to the children's aggressiveness, regardless of the friendship status of the instigator, and (2) the predicted response to aggressiveness varied with type of instigator.

• 제어로봇시스템학회:학술대회논문집
• /
• 제어로봇시스템학회 2001년도 ICCAS
• /
• pp.148.2-148
• /
• 2001

The most important difference of an airship from conventional vehicle is that it has the apparent mass and inertia provided from the existence of Helium gas inside the airship. To acquire To acquire the exact response of the airship, the longitudinal responses of airship with respect to the vertical gust, which is the non-linear system, have been studied. An Airship has neutral buoyancy in equilibrium state. When it moves, its motion shows much difference comparing with conventional aircraft. Here, we compare two cases, the one has the apparent mass and the other hasn´t. With the apparent mass, the magnitude of the former response is smaller than the latter, while the frequency is higher. However, the apparent mass delay ...

• Journal of Ship and Ocean Technology
• /
• 제4권2호
• /
• pp.1-12
• /
• 2000

The present study concentrates on the weak-scatterer hypothesis for the nonlinear wave-body interaction problems. In this method, the free surface boundary conditions are linearized on the incoming wave profile and the exact body motion is applied. The considered problems are the diffraction problem near a circular cylinder and the ship response in oblique waves. The numerical method of solution is a Rankine panel method. The Rankine panel method of this study adopts the higher-order B spline basis function for the approximation of physical variables. A modified Euler scheme is applied for the time stepping, which has neutral stability. The computational result shows some nonlinear behaviors of disturbance waves and wave forces. Moreover, the ship response shows very close results to experimental data.

• Structural Engineering and Mechanics
• /
• 제87권2호
• /
• pp.165-172
• /
• 2023

This paper presents a novel method for modeling elastic wave propagation in long beams. The proposed method derives a solution for the transient transverse displacement of the beam's neutral axis without assuming the separation of variables (SV). By mapping the governing equation from the space domain to the frequency domain using Fourier transformation (FT), the transverse displacement function is determined as a convolution integral of external loading functions and a combination of trigonometric and Fresnel functions. This method determines the beam's response to general loading conditions as a linear combination of the analytical response of a beam subjected to an abrupt localized loading. The proposed solution method is verified through finite element analysis (FEA) and wave propagation patterns are derived for tone burst loading with specific frequency contents. The results demonstrate that the proposed solution method accurately models wave dispersion, reduces computational cost, and yields accurate results even for high-frequency loading.

• 한국정보디스플레이학회:학술대회논문집
• /
• 한국정보디스플레이학회 2006년도 6th International Meeting on Information Display
• /
• pp.864-867
• /
• 2006

In order to satisfy with the clear visibility without any difficulties such as blurring and tailing, the high refreshing rate technology and fast response time of LC itself were applied to TFT-LCDs. In proportion to the decrease of holding time of 1 frame, the fast transition of LC behavior was necessary to both maintain the luminance and minimize the tailing appearance. The introduction of a new LC mixture for faster response times was realized by the good combination of newly introduced dielectrically neutral LC material so called 'Super Low Viscosity' (SLV) and highly polar $CF_2O-linkage$ LC material. This resulted in about a 20% reduction in the ${\gamma}_1$ of the new LC mixture compared to the references. In accordance with a new LC mixture with low ${\gamma}_1$, fast response time of 5ms has been made for S-IPS LCD TV application. Consequently, by applying the high frame frequency of 120Hz driving alongside the 5ms response time characteristics, the MPRT value was reduced by half.

• Computers and Concrete
• /
• 제1권2호
• /
• pp.211-226
• /
• 2004

A relatively simple multiple-vertical-line-element macro model has been incorporated into a standard computer code DRAIN-2D. It was used in blind predictions of seismic response of cantilever RC walls subjected to a series of consequent earthquakes on a shaking table. The model was able to predict predominantly flexural response with relative success. It was able to predict the stiffness and the strength of the pre-cracked specimen and time-history response of the highly nonlinear wall as well as to simulate the shift of the neutral axis and corresponding varying axial force in the cantilever wall. However, failing to identify the rupture of some brittle reinforcement in the third test, the model was not able to predict post-critical, near collapse behaviour during the subsequent response to two stronger earthquakes. The analysed macro model seems to be appropriate for global analyses of complex building structures with RC structural walls subjected to moderate/strong earthquakes. However, it cannot, by definition, be used in refined research analyses monitoring local behaviour in the post critical region.

• 대한간호학회지
• /
• 제8권1호
• /
• pp.111-130
• /
• 1978

This study of nurse educator's attitudes which found aspects of professional nursing was carried out from September 10 to 30, 1977. Subjects were 205 respondents from a total population of 314 nurse educators from the level of instructors to professors in all the diploma (post high school 3 year), professional junior college (3 year level) and university (4 year) nursing schools in Korea. Specific objectives were to determine their attitudes about the 1. social position of nursing as a profession, 2. nurses attitudes towards their word, 3. factors influencing the development of nursing, 4. the future of nursing, 5. nursing educational problems, 6. their own educational position's intrinsic job satisfaction and 7. their salary and benefits. The instrument used was a questionnaire developed from consultations with nursing educators and sociologists, and based on earlier. worts by Burke (1976), Mason (1974) and Hong 1969. Data were analysis by computer using one-way analysis. Statistically significant findings included the following; 1. Responses were positive toward all seven aspects of professional nursing. 2. Compared to diploma nursing school staff whose responses were positive, professional and university school faculty response toward the social position of nursing were neutral. 3. Faculty with clinical experience of 10 to 19 years were most positive in their responses about nurses' attitudes towards their work. In all three types of schools, in comparison to professors, associate professors' responses were more positive about nurses' attitudes toward their work. Faculty with longer clinical experience expressed high agreement with statements about factors which influence the development of nursing. Without any differences between school, all faculty had positive attitudes towards the future of nursing, the younger the staff member, the more positive were the responses. 4. faculty in diploma schools and those with 10 to 19 years clinical experience expressed high agreement with statement about nursing educational problems, 6. their own educational position's intrinsic job satisfaction and 7. their salary and benefits. The instrument used was a questionnaire developed from consultations with nursing educators and sociologists, and based on earlier. worts by Burke (1976), Mason (1974) and Hong 1969. Data were analysis by computer using one-way analysis. Statistically significant findings included the following; 1. Responses were positive toward all seven aspects of professional nursing. 2. Compared to diploma nursing school staff whose responses were positive, professional and university school faculty response toward the social position of nursing were neutral. 3. Faculty with clinical experience of 10 to 19 years were most positive in their responses about nurses' attitudes towards their work. In all three types of schools, in comparison to professors, associate professors' responses were more positive about nurses' attitudes toward their work. Faculty with longer clinical experience expressed high agreement with statements about factors which influence the development of nursing. Without any differences between school, all faculty had positive attitudes towards the future of nursing, the younger the staff member, the more positive were the responses. 4. faculty in diploma schools and those with 10 to 19 years clinical experience expressed high agreement with statement about nursing educational problems while responses from faculty from professional schools and those without clinical experience were neutral. 5. Responses showed general satisfaction with intrinsic aspects of teaching in all school. Associate professors were positive about satisfaction with salary and other benefits but full professors' responses were neutral.

• Animal Bioscience
• /
• 제35권12호
• /
• pp.1967-1976
• /
• 2022

Objective: The aim of this study was to characterize the fecal microbiota of broiler chickens reared in the presence of different shades of light-emitting diode (LED) lights, correlating this information with biochemical and molecular evidence that allowed drawing conclusions on the state of health of the animals. Methods: Overall, the metagenomic approach on fecal samples was associated with evaluations on enzymes involved in the cellular response to oxidative stress: glutathione peroxidase (GPX), superoxide dismutase and catalase; while the inflammatory aspect was studied through the dosage of a proinflammatory cytokine, the interleukin 6 (IL-6), and the evaluation of the matrix metalloproteinases 2 (MMP-2) and 9 (MMP-9). Specifically, analysis was performed on distinct groups of chickens respectively raised in the presence of neutral (K = 3,300 to 3,700), cool (K = 5,500 to 6,000), and warm (K = 3,000 to 2,500) LED lightings, and a direct comparison was performed with animals reared with traditional neon lights. Results: The metagenomic analysis highlighted the presence of two most abundant bacterial phyla, the Firmicutes and the Bacteroidetes, with the latter characterized by a greater relative abundance (p<0.05) in the group of animals reared with Neutral LED light. The analysis on the enzymes involved in the antioxidant response showed an effect of the LED light, regardless of the applied shade, of reducing the expression of GPX (p<0.01), although this parameter is not correlated to an effective reduction in the tissue amount of the enzyme. Regarding the inflammatory state, no differences associated with IL-6 and MMP-9 were found; however, is noteworthy the significant reduction of MMP-2 activity in tissue samples obtained from animals subjected to illumination with neutral LED light. Conclusion: This evidence, combined with the metagenomic findings, supports a potential positive effect of neutral LED lighting on animal welfare, although these considerations must be reflected in more targeted biochemical evaluations.

• 감성과학
• /
• 제22권4호
• /
• pp.75-84
• /
• 2019

중독자들은 물질이나 행동과 같은 중독-관련 단서에 주의를 더 기울인다. 그리고 이러한 단서들에 증가된 주의는 갈망과 관련이 있다. 국내 마약류 사범 중 가장 많이 남용되고 있는 마약류는 메스암페타민이며, 재범률은 지속적으로 증가하고 있는 추세이다. 최근 3년 동안 전체 마약류 사범 중 여성의 비율은 21.1%이나, 여성 마약류 사범에 대한 연구의 부족으로 관련 정책과 심리치료 프로그램 개발을 위한 기초 자료는 부족한 실정이다. 본 연구의 목적은 여성 메스암페타민 중독자들을 대상으로 약물 단서에 대한 주의편향이 나타나는지를 확인하는 것이다. 본 연구에서는 교정기관에 수용중인 여성 메스암페타민 중독자(중독 집단) 22명과 약물과 관련한 문제가 없는 정상인(통제 집단) 22명을 대상으로 탐침탐사 과제를 수행하였다. 이 과제를 통해 약물 단서와 중성 단서 위치에 따른 정반응률 및 정반응시간을 산출하였다. 그 결과, 통제 집단은 정반응률과 정반응시간 모두에서 약물 단서와 중성 단서 간의 차이가 없었으나, 중독 집단은 중성단서에 비해 약물 단서에서 더 낮은 반응률과 더 느린 반응시간을 보였다. 이러한 본 연구의 결과는 마약류로부터 단절된 여성 메스암페타민 중독자들의 약물 단서에 대한 주의편향 특성을 규명하였다는 점에서 의의가 있다.

• 한국어병학회지
• /
• 제10권1호
• /
• pp.53-63
• /
• 1997

본 실험에서는 두 온도 조건(15, $25^{\circ}C$)하에서 포르말린과 중성 포르말린(0, 50, 100, 150, 200, 300 ppm)으로 약욕한 넙치(Paralichthys olivaceus)의 회복에 필요한 시간을 알아보기 위해 아가미와 신장의 병리 조직학적인 관찰과 혈액내 변형 적혈구율이 조사되었다. 모든 실험구에서 포르말린이 중성 포르말린보다 독성이 강하게 나타났고, 낮은 농도(50~100 ppm)에서는 병변이 아중증까지 진행되지 않았다. 예상대로, 약욕 농도와 온도가 증가할수록 회복시간이 길어졌다. 약욕에 의한 아가미의 병변은 부종, 2차 새변의 뒤틀림, 상피세포의 박리, 혈전 증상이 나타나고 신장에서는 부종, 수증성 퇴행성 병변, 초자적 변성이 일어났다. 대표적으로, 포르말린과 중성 포르말린 300 ppm에 침지된 어류의 아가미 조직 회복시간은 $25^{\circ}C$조건의 포르말린에서는 약 120시간, 중성 포르말린에서는 72시간과 $15^{\circ}C$조건의 포르말린에서는 72시간, 중성 포르말린에서는 48시간 정도였다. 신장 조직의 회복은 $25^{\circ}C$조건 포르말린에서는 72시간, 중성 포르말린에서는 48시간 정도였고 $15^{\circ}C$조건의 포르말린과 중성 포르말린에서는 다같이 48시간 정도였다. 혈액내 변형적혈구율의 최대 수치는 $25^{\circ}C$ 수온조건, 포르말린 300 ppm 구에서 27.84%로 나타났다. 변형적혈구율의 감소 추세는 조직의 회복과 비슷한 양상을 보였다.