• Advances in nano research
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• 제2권1호
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• pp.57-67
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• 2014

This article shows the coarsening behavior of nanoparticle multilayers during heat treatments which produce larger metallic nanostructures with varying shapes and sizes on glass slides. Nanoparticle multilayer films are initially constructed via the layer-by-layer self-assembly of small and monodispersed gold and/or palladium nanoparticles with different compositions (gold only, palladium only, or both gold and palladium) and assembly orders (compounding layers of gold layers over palladium layers or vice versa). Upon heating the slides at $600^{\circ}C$, the surface nanoparticles undergo coalescence becoming larger nanostructured metallic films. UV-Vis results show a clear reliance of the layering sequence on the optical properties of these metal films, which demonstrates an importance of the outmost (top) layers in each nanoparticle multilayer films. Topographic surface features show that the heat treatments of nanoparticle multilayer films result in the nucleation of nanoparticles and the formation of metallic cluster structures. The results confirm that different composition and layering sequence of nanoparticle multilayer films clearly affect the coalescence behavior of nanoparticles during heat treatments.

• Ocean Systems Engineering
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• 제4권1호
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• pp.1-19
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• 2014

Hydrodynamic coefficients strongly affect the dynamic performance of autonomous underwater vehicles (AUVs). A novel kind of underwater vehicle (Heavier-than-water AUV) with higher density than water is presented, which is different from conventional ones. RANS method and overlapping grids are used to simulate the flow field around the vehicle. Lifts, drags and moments of different attack and drift angles in steady state are calculated. The hydrodynamic performances and how the forces change with the attitude are analyzed according to the flow field structure. The steady-state results using overlapping grid method are compared with those of software FLUENT and wind tunnel tests. The calculation results show that the overlapping grid method can well simulate the viscous flow field around the underwater vehicle. Overlapping grid skills have also been used to figure out the planar-motion-mechanism (PMM) problem of Heavier-than-water AUV and forecast its hydrodynamic performance, verifying its effectiveness in dealing with the dynamic problems, which would be quite helpful for design and control of Heavier-than-water AUV and other underwater vehicles.

• 대한기계학회논문집A
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• 제21권6호
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• pp.907-917
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• 1997

The purpose of this study is to design an anti-sway motion for industrial overhead cranes which transport objects on a horizontal plane by adjusting movements of a trolley motor and a girder motor. The movement of a hoist motor has not been considered at this time since its role was assumed to move objects only vertically, therefore, not to affect the swing motion of objects. The dynamic behavior of the swing motion shows nonlinear characteristics, which makes the design of anti-sway motion controller difficult. First of all, the nonlinear state equation for the motion of industrial overhead cranes has been derived. Then they have been linearized about normal operating states determined by the dynamic characteristics of motor motion-acceleration, constant speed, and deceleration, and deceleration, during transportation. The partial state feedback control algorithm based on this linearized state equation has been developed on order to suppress the swing motion. The simulation results have demonstrated satisfactory performance of the proposed controller.

• Coupled systems mechanics
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• 제8권2호
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• pp.129-146
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• 2019

The main goal of this work is to develop a numerical simulator to study an isothermal single-phase two-component flow in a naturally fractured oil reservoir, taking into account advection and diffusion effects. We use the Peng-Robinson equation of state with a volume translation to evaluate the properties of the components, and the discretization of the governing partial differential equations is carried out using the Finite Difference Method, along with implicit and first-order upwind schemes. This process leads to a coupled non-linear algebraic system for the unknowns pressure and molar fractions. After a linearization and the use of an operator splitting, the Conjugate Gradient and Bi-conjugated Gradient Stabilized methods are then used to solve two algebraic subsystems, one for the pressure and another for the molar fraction. We studied the effects of fractures in both the flow field and mass transport, as well as in computing time, and the results show that the fractures affect, as expected, the flow creating a thin preferential path for the mass transport.

• 한국생활과학회지
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• 제22권1호
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• pp.57-74
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• 2013

The purpose of this study was to identify how age-identity is associated with the attitude toward the elderly and self-esteem of the aged. The subjects were 366 adults aged 60 and over. The statistics used for the data analysis were reliability test, frequency, percentage, mean, standard deviation, one way ANOVA, correlation and multiple regression. The results of this study were as follows; First, The majority of elderly acknowledged psychological ages as their actual ages. Secondly, The degrees of elderlys' age-identity was 2.12, and the levels of the attitude toward the elderly was 60.62. Also, The degrees of elderlys' self-esteem was 24.16. The surveyed data showed higher means than medians. Third, The age-identity of elderly was significant with respect to spouse, religion, career, living state, sex, age, gap of actual age, health state, economic state, education, monthly living expenses. And the attitude toward the elderly was stastically significant with respect age-identity, career, spouse, religion, living state, health state, education, monthly living expenses, economic state, gap of actual age, and age. Moreover, The elderlys' self-esteem level was significant with respect to spouse, age-identity, living state, religion, career, economic state, monthly living expenses, the attitude toward the elderly, health state, education, and age. Finally, The variables affecting the age-identity of elderly were health state, economic state, religion, age that explained about 34% of the total variance. And The attitude toward the elderly were age-identity, health state, gap of actual age that explained about 19% of the total variance. Also, The variables that affect elderlys' self-esteem were economic state, age-identity, the attitude toward the elderly, sex, monthly living expenses that explained about 33% of the total variance.

• Asian Pacific Journal of Cancer Prevention
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• 제15권22호
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• pp.9631-9634
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• 2014

Background: : In 2012, the breast cancer estimate worldwide stood at 1.67 million new cases, these accounting for 25% of all types of cancer diagnosed in women. For 2014, 57,120 new cases are expected, with a risk estimated at 56.1 cases for every 100,000 women. The objective of this study was to analyze the satisfaction regarding the use of external breast prostheses by women undergoing mastectomy. Materials and Methods: This cross-sectional study was conducted with 76 women who used an external breast prosthesis (EBP), registered in the services of the Cuiaba Center for Comprehensive Rehabilitation, Mato Grosso, Brazil, from 2009 to 2012. Data were collected from the records of women who had requested the opening of a process of external breast prosthesis concession. Results: Satisfaction with the EBP was identified in 56.6% of the women. Those satisfied with the EBP reported that its weight was not annoying (p<0.01). Although the women felt body sensations of stitches, pains, pulling, dormancy and phantom limb, they are satisfied with the EBP. The variable related to the displacement of the breast prosthesis during activity of everyday life has demonstrated that even though the women have reported the possibility of displacements, they are satisfied with the EBP. The satisfaction with the use of external breast prosthesis did not affect the sexuality of the women with mastectomy. Conclusions: Learning the specificities of the EBP, taking into consideration the satisfaction of its use, allows the rehabilitation team, by listening to their clientele more attentively, following up this woman throughout her life journey, supporting and guiding the best way of use, with an eye to her personal, emotional and social life, as well as to her self-esteem.

• 산학경영연구
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• 제13권
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• pp.67-87
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• 2000

과거 16년 동안 광고에서 감정에 관한 연구는 놀랄만한 성과를 이룩해 왔다. 광고에서 감정의 역할에 관한 연구는 다양한 관점에서 연구되어 광고를 집행하는 데 지침이 되는 밑걸음을 제공하였다. 그러나 다양한 연구결과에도 불구하고 통합적으로 정리되지 않아 실무에서 광고표현전략을 전개하는 데에는 한계가 있었다. 본 연구는 광고에서 감정에 관한 역할을 지금까지의 연구결과를 토대로 체계화시켜 정리함으로써 체계적이고 통합적인 시각을 제공하기 위하여 연구되었다. 본 연구에서는 감정과 관련되는 유사 개념들을 살펴보았으며 이론적인 틀을 마련하여 광고에서 감정에 관한 연구를 정리하는 데 기초로 삼았다. 광고에서 감정의 역할에 관한 연구는 자극으로서 장고 특성과 관련한 연구, 자극으로서 광고가 제시되는 환경과 관련한 연구, 개인의 특성과 관련한 연구, 광고 태도 및 상표 태도와 관련한 연구로 구분할 수 있다. 이러한 연구 결과를 기초로 향후 광고에서 감정과 관련해서 연구할 분야로 광고 소구, 부정적인 감정의 역할, 감정의 측정, 새로운 매체에서의 역할, 인지요소와의 관련성 등을 제시하였다.

• 동의신경정신과학회지
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• 제26권2호
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• pp.103-116
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• 2015

Objectives: Medical students suffer from mental health and academic problems due to academic stress. We investigated academic stress and exhaustion along with psychological issues caused by medical education during the years in the School of Korean Medicine. Methods: Two hundred fifty-one university students from the School of Korean Medicine, Pusan National University, were asked to complete the Medical Stress Scale (MSS), Maslach Burnout Inventory-Student Survey (MBI-SS), Positive Affect and Negative Affect Schedule (PANAS), and State-Trait Anxiety Inventory (STAI) three times during each semester for two years from 2013 onwards. We analyzed the influence of school term and vacation on educational stress and negative affect with the T-test. The Pearson's correlation analysis and regression analysis were used to predict changes during the first semester or first years of study in the School of Korean Medicine. Results: Academic stress and burnout increased steadily until the first semester of third grade, which was measured with MSS and MBI-SS. The anxiety level was highest when the students started the first grade and it decreased significantly after the first semester. Negative affect repeatedly increased significantly after each school term; however, it reduced after each vacation. In the first grade, 19.5% of the last measure of MSS can be explained with the first measure of MSS. Discussion: This study extensively reviewed the trends and characteristics of four years of academic stress and its related psychological influence, and discussed its importance for developing a more efficient academic curriculum for traditional Korean Medicine.

• 한국심리학회지 : 문화 및 사회문제
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• 제20권4호
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• pp.391-414
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• 2014

본 연구에서는 운전자들이 경험한 상태운전분노가 운전자의 상황인식과 추돌회피 수행에 어떠한 영향을 미치는지, 그리고 상황인식에 대한 상태운전분노의 효과를 긍정/부정정서가 어떻게 조절하는지 운전 시뮬레이션을 통해 살펴보았다. 본 실험에는 63명의 대학생 운전자들이 참여하였다. 본 연구의 주요결과를 정리하면 다음과 같다. 첫째, 상태운전분노 수준에 따라 추돌위험 가능상황에서 실제 추돌사고를 야기했는지의 여부를 분석한 결과, 상태운전분노를 높은 수준으로 경험한 실험참가자들은 그렇지 않은 실험참가자들에 비해 선행차량과의 추돌비율이 유의하게 높았다. 둘째, 상황인식 측정점수에 대한 특성운전분노와 긍정/부정정서의 주효과는 각각 유의하지 않았다. 셋째, 상태운전분노 수준이 높을수록 전반적으로 상태운전분노 유발 이후의 상황인식 점수가 유의하게 낮아지기는 하였으나 이러한 경향은 부정정서가 높은 경우에 더 두드러져 상태운전분노에 의한 상황인식에서의 저하는 운전자의 부정정서 점수가 높을수록 더 컸다. 이러한 결과들은 운전자의 특성운전분노보다는 상태운전분노가 운전자의 상황인식 능력 저하와 유의한 관련성이 있고, 특히 운전자의 상태운전분노가 상황인식에 대해 갖는 효과는 부정정서와 같은 정서-관련변인을 통합적으로 고려할 경우 더 타당하게 설명될 수 있다는 것을 시사한다.

• 사상체질의학회지
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• 제23권3호
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• pp.330-339
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• 2011

1. Objectives: The purpose of this study is to find the association between personality pattern and quality of life according to Sasang Constitution. 2. Methods: The 529 subjects whose constitutions had been confirmed by the experts on the base of drug response were recruited. Personality questionnaire was composed of 15 personal characteristics items measuring the influence of yin/yang and health estimating instrument was SF-12 evaluating the quality of life. Two-way ANOVA was conducted to analyze the Sasang Constitutional difference according to personality pattern. 3. Results: There were 5 different items in PCS(physical component summary), 7 different items in MCS(mental component summary). The individual scores of 3 items - give up easily/stand, decide easily/hard and be exited easily/rationalwere different according to the Sasang Constitution. 4. Conclusions: We suggest that psychological factors may affect the health state, especially might affect the health state of Sasang Constitution differently.