• 한국환경생태학회지
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• 제30권3호
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• pp.434-442
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• 2016

스트레스 수준에 따라 산림치유 프로그램의 선호도에 차이가 있는지를 살펴 보았다. 편의표본추출(convenience sampling)방법을 이용하여 성인 남 여를 대상으로 산림치유 프로그램 선호도와 사회 심리적 스트레스 척도에 관한 설문을 실시하였다. 사회 심리적 스트레스 척도(PWI-SF: Psycho social Well-being Index Short Form)를 근거로 성인 620명을 건강군, 잠재적 스트레스군, 고위험군으로 분류하였다. 자료분석은 SPSS 21.0 프로그램을 사용하였다. 스트레스 수준에 따른 세 군 사이의 산림치유 프로그램 선호도 차이를 알아보기 위해 일원 분산분석(one-way ANOVA)을 이용하였다. 스트레스 수준에 따라 산림치유 프로그램 선호도(호흡법 호흡체조, 자유롭게 숲속걷기, 물 흐르는 소리 듣기, 카운슬링 상담 등 전문가 코칭, 스트레스 관련 강의, 대인관계 커뮤니케이션 강의, 경관보기, 숲 해설 듣기, 삼림욕 풍욕 일광욕)에 있어서 차이가 있었다. 고위험 스트레스군은 카운슬링 상담 등 전문가 코칭, 스트레스 관련 강의, 대인관계 커뮤니케이션 강의 등의 인지적인 접근의 프로그램을, 건강군은 호흡법 호흡체조, 자유롭게 숲속걷기(신발착용), 물 흐르는 소리 듣기, 경관보기, 삼림욕 풍욕 일광욕 등의 오감을 활용하는 감성적인 접근의 프로그램을 각각 상대적으로 높게 선호하는 것으로 나타났다. 잠재적 스트레스군에 있어서는 두드러진 선호도가 발견되지 않았다. 본 연구 결과가 스트레스 정도에 따른 산림치유 프로그램을 개발을 위한 기초자료로 활용되기를 기대한다.

• 한국주거학회논문집
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• 제19권3호
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• pp.1-10
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• 2008

When environmental elements such as heat, light, air, and sound conditions were suited for the human life, it makes for the welfare and comfortableness of dwellers. This study about residential environmental stress based on environmental psychology very importance because dwellers' background characteristics have an impact on their residential environmental stress levels and it was related to dwellers' satisfaction and well-being. Research about stress connected with residential environment is very important. One's residential environment has direct effects not only on the physical environment but also on family values and expectations, actions, attitude etc. The purpose of this paper is to: 1) identify the general trends of residential environmental stress 2) analyze the differences in socio-demographic characteristics and how the physical characteristics of buildings affect stress. The samples in this study consisted of dwellers living in multi-family housing in Gwang-ju, South Korea. The city was divided into 5 districts and used quota sampling. 324 housewives were sampled from the households by self-administered questionnaires. The survey was conducted in December of the year 2006 after the questionnaire was revised based on the results of preliminary survey.

• 소성∙가공
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• 제21권4호
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• pp.265-270
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• 2012

In this study, a process design method for the multi-pass shape drawing is proposed with consideration of the drawing stress. First, the shape drawing load was calculated to evaluate the shape drawing stress, and the intermediate die shape was determined by using an electric field analysis and the average reduction ratio. In order to evaluate whether material yielding occurs at the die exit, the drawing stress was determined by using the calculated shape drawing load. Finally, FE-analysis and shape drawing experiments were conducted to validate the design of the multi-pass shape drawing process. From the results of the FE-analysis and shape drawing experiments, it was possible to produce a sound shape drawn product with the designed process. The dimensional tolerances of the product were within the allowable tolerances.

• ETRI Journal
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• 제38권6호
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• pp.1218-1228
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• 2016

This paper proposes a robot hand for a violin-playing robot and introduces a newly developed robot finger. The proposed robot hand acts as the left hand of the violin-playing robot system. The violin fingering plays an important role in determining the tone or sound when the violin is being played. Among the diverse types of violin fingering playing, it is not possible to produce vibrato with simple position control. Therefore, we newly designed a three-axis load cell for force control, which is mounted at the end of the robot finger. Noise is calculated through an analysis of the resistance difference across the strain gauge attached to the proposed three-axis load cell. In order to ensure the stability of the three-axis load cell by analyzing the stress distribution, the strain generated in the load cell is also verified through a finite element analysis. A sound rating quality system previously developed by the authors is used to compare and analyze the sound quality of the fourth-octave C-note played by a human violinist and the proposed robot finger.

• 한국음향학회지
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• 제25권5호
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• pp.197-206
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• 2006

비올족 현악기에서 현의 진동은 브릿지에 의해 전판에 전달되어서 악기 몸통을 공명시킨다. 따라서 브릿지의 재질, 기하학적 형상, 설치 위치 등이 음색에 영향을 미치게 된다. 본 연구에서는 첼로에서 현에 의해 변위가 가해질 때 브릿지 내부의 변형, 응력, 그리고 브릿지 다리에 의해 전판에 미치는 힘을 탄성학적으로 해석하고, 브릿지의 고유진동모드와 고유진동주파수 등을 구하였다. 또, 브릿지의 형상이 음색에 미치는 영향을 주파수 응답의 관점에서 측정하였다. 본 연구의 결과는 첼로에서 브릿지의 진동특성은 대단히 복잡하고, 그 재질, 형상 등이 음색에 큰 영향을 미치며, 따라서 브릿지의 형상을 변화시킴으로써 첼로의 음색을 조정하는 것이 가능함을 실험적으로 보였다.

• 한국치위생학회지
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• 제19권2호
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• pp.241-249
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• 2019

Objectives: This study aimed to investigate the effects of verbal violence experience on stress and positive psychological capital as well as the mediating effects of positive psychological capital. Methods: A survey was conducted with dental hygienists working at university hospitals, general hospitals, and dental hospitals and clinics in Busan, Gyeongnam, and Ulsan areas.Of the 230 questionnaires distributed, 206 were used in the analysis after excluding 24 completed questionnaires that had errors or missing answers. Results: As a result of identifying the relationships between verbal violence damage, positive psychological capital, and stress, verbal violence damage was negatively correlated with positive psychological capital (r=-0.28, p<0.001) and positively correlated with stress (r=0.40, p<0.001). Positive psychological capital had a negative correlation with stress (r=-0.25, p<0.001). As a result of verifying the mediating effects of positive psychological capital on the relationship between verbal violence damage and stress among dental hygienists, it was found that verbal violence had a significant effect on stress and positive psychological capital in the first and second stages. In the third stage, the effect of positive psychological capital on stress was significant, showing that there was a mediating effect. Conclusions: Therefore, sound work environments should aim to reduce verbal violence while increasing support systems to reduce negative emotional and psychological states.

• 센서학회지
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• 제22권6호
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• pp.410-414
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• 2013

As one of the effective methods for researching the objective tinnitus detection, the GPIAS (Gap Pre-pulse Inhibition of Acoustic Startle) measurement has been used to verify the existence of animal tinnitus objectively. The level and pattern of the background sound presented prior to a startle pulse are closely related with the GPIAS results. But the effect of the starting point of the background sound on animal startle responses has not been reported yet. In this paper, we present the implementation of a GPIAS measurement system based on an unconstrained enclosure to avoid animals' excessive constraint stress and deal with the animals' growth. After the performance of our implemented system has been tested through the animal experiment using 4 SD-rats, the effect of starting point of stimulus background sound on the startle response has been studied by the use of our implemented system. Through the results, it is verified that our system can measure the inhibition of animal startle responses due the gap pre-pulse for GPIAS calculation and the background sound starting point does not significantly effect on the startle response and the GPIAS values if the background sound continues for more than 300msec before a gap pre-pulse is presented.

• 가족자원경영과 정책
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• 제19권1호
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• pp.1-21
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• 2015

Unlike daily hassles or minor stressors, immigration is an intense life event that may cause excessive stress. In particular, immigrant parents find themselves in a more stressful situation in that they experience stresses caused by immigration and stresses caused by parenting at the same time. The purpose of this study is to develop and validate an Immigrant Parental Stress Inventory (IPSI), that objectively and comprehensively assesses the stress experienced by immigrant parents within the Korean context. Based on the Immigrant Parental Stress Inventory developed within the American context, preliminary items were refined through a literature review and the discussions of experts and immigrant parents and were empirically validated with a sample of 203 immigrant parents residing in Korea. Through exploratory and confirmatory factor analysis, six main factors were identified (Factor1 Difficulties in communication, Factor2 Financial difficulties, Factor3 Difficulties in social adjustment, Factor4 Social discrimination, Factor5 Lack of social resources, Factor6 Difficulties in parenting). The IPSI was shown to be a psychometrically sound instrument that is capable of measuring immigrant parental stress within the Korean context. Social service professionals and researchers studying or working with immigrant families could use the IPSI to examine immigrant parental stress.

• 대한치과의사협회지
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• 제48권4호
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• pp.297-307
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• 2010

Noncarious cervical lesions(NCCLs) are characterized as structural defects found on the tooth surface of the cement-enamel junction. Loss of tooth structure through noncarious mechanisms may vary in etiology and clinical presentation for each individual but presently many clinician now classify this as tooth failure of abfraction due to the stress applied in the cervical area of the tooth under oral physiological and pathological loads. In the current study, we investigated the stress distribution of maxillary premolar with NCCL using simulated 3D finite element analysis. The results were as follows: 1. In the sound maxillary premolar, the stresses were highly concentrated at cervical enamel surface of the mesiobuccal line angle, asymmetrically. 2. Once the lesion has been formed, the highest stress concentration was observed around the apex of the wedge shaped lesion. 3. In four types of NCCL, the patterns of stress distribution were similar and the peak stress was observed at mesial corner and also stresses concentrated at lesion apex. 4. Lesion cavity modification of rounding apex, reduced stress of lesion apex. 5. When restoring the notch-shaped lesion, material with high elastic modulus worked well at the lesion apex and material with low elastic modulus worked well at the cervical cavosurface margin.

• 자원리싸이클링
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• 제14권1호
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• pp.55-63
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• 2005

This study investigated the electrochemical recovery of palladium in a HCl solution that is used for palladium leaching. The high acidity of HCl solution and the low concentration of Pd ions increased the cathodic overpotential and reduced the limiting current density. Lowering the current density produced dense deposits; however, they were under high tensile stress. Raising the temperature affected both the densification and the stress, which enabled the attainment of dense Pd deposits under low stress. Lowering the current density and raising the temperature up to 70$^{\circ}C$ was recommended for the recovery of palladium as sound bulk Pd deposits. Current efficiency was over 85% at the initial stage of recovery may decrease the current efficiency, since a low Pd ion concentration results in a low limiting current density.