• 융합정보논문지
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• 제9권3호
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• pp.146-151
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• 2019

본 연구는 간호사의 직무 스트레스와 자기효능감과의 관계를 규명하기 위하여 관련 연구의 동향을 고찰하고 텍스트 네트워크 분석을 시행하였다. 선행문헌고찰을 위하여 국내 3곳, 국외 1곳의 데이터베이스를 이용하여 '간호사', '스트레스', '자기효능감', 'nurse', 'stress', 'self-efficacy'를 주요 검색어로 검색하였다. 총 18편의 논문이 대상 문헌으로 선정되었다. 이중 9편의 연구에서 간호사의 직무 스트레스와 자기효능감 간에 통계적으로 유의한 음의 상관관계가 있음을 보고하였다. 그러나 도구의 선택에 있어 번안자에 따라 문항을 선택적으로 사용하여 상이한 결과가 도출되어 동일한 도구를 사용한 다른 논문들과의 비교 분석이 어려웠다. 또한, 18편 논문의 초록에서 키워드를 추출하여 텍스트 네트워크 분석을 시행하였다. 출현 빈도수가 가장 높은 단어는 직무스트레스였고, 이를 기준으로 관계를 분석하였을 때 출현 빈도수가 높은 주요어는 자기효능감, 의료기관, 상관성이었다. 해당 주요어간의 관계를 명확하게 하기 위해 한국형 도구 개발을 통한 영향요인 탐색 연구 수행을 제언한다.

• 한국콘텐츠학회논문지
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• 제21권8호
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• pp.580-592
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• 2021

본 연구는 영유아 자녀를 둔 여성을 대상으로 양육 스트레스 및 우울증에 영향을 미치는 관련 요인을 파악하고, 미용 프로그램이 양육 스트레스 및 우울증에 미치는 효과를 검증하고자 수행되었다. 부산에 거주하는 산후 36개월 이하의 영유아 자녀를 둔 여성 450명을 2018년 5월 1일부터 20일까지 임의 표집하여 자기기입식 설문조사를 시행한 후 402명을 최종 분석하였다. 또한 미용 프로그램이 양육 스트레스 및 우울증에 미치는 효과를 실증적으로 검증하고자 2018년 6월 1일부터 29일까지 17명을 대상으로 단일군 사전사후 실험연구방법의 미용치료프로그램을 진행하였으며, 그 결과는 다음과 같다. 다중회귀분석결과, 외모관리행동을 많이 할수록 양육 스트레스 및 우울증은 낮아지는 경향을 보였으며, 미용프로그램 참여 전에 비해 미용 프로그램 참여 후 양육 스트레스와 우울증은 유의미하게 감소하는 것으로 나타났다. 따라서 미용 프로그램은 여성의 정신건강과 자존감을 향상시키는 효과적인 방법 중 하나임을 확인하였다.

• 한국전기전자재료학회논문지
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• 제15권2호
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• pp.190-197
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• 2002

In this thesis, ZnO varistors with various formulation, such as A∼E, were fabricated according to ceramic fabrication method. The microstructure, electrical properties, and surge characteristics of ZnO varistors were investigated according to ZnO varistors with various formulation. In the microstructure, A∼E\`s ZnO varistor ceramics sintered at 1130$\^{C}$ was consisted of ZnO grain(ZnO), spinel phase (Zn$\_$2.33/Sb$\_$0.67/O$\_$4/), Bi-rich phase(Bi$_2$O$_3$) and intergranuler phase, wholly. Lightning impulse residual voltage of A, B, C and E\`s ZnO varistors suited standard characteristics, below 12kV at current of 5kA. On the contrary, D\`s ZnO varistor exhibited high residual voltage as high reference voltage. In the accelerated aging test, leakage current and watt loss of B, C and D\`s ZnO varistors increases abruptly with stress time under the first a.c. stress(115$\^{C}$/3.213kV/300h). Consequently, C varistor exhibited a thermal run away. On the contrary, leakage current and watt loss of A and C\`s ZnO varistors which show low initial leakage current exhibited constant characteristics. After high current impulse test, A\`s ZnO varistor has broken the side of varistor but impulse current flowed. On the contrary, E\`s ZnO Varistor exhibited good discharge characteristics which the appearance of varistor was not wrong such as puncture, flashover, creaking and other significant damage. After long duration impulse current test, E\`s ZnO varistor exhibited good discharge characteristics which the appearance of varistor was not wrong such as puncture, flashover, creaking and other significant damage. After high current impulse test and long duration impulse current test, E\`s ZnO varistor exhibited very good characteristics which variation rate of residual voltage is 1.4% before and after test.

• 대한치과보철학회지
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• 제43권2호
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• pp.218-231
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• 2005

Statement of problem. In the partially edentulous patients, removable partial dentures have been working as a important treatment modality. Clasps, a kind of direct retainers, received some amount of stresses during the insertion and removal of partial denture on the abutment tooth. Purpose. The study is to investigate stresses of the different clasps. Material and methods. In order to investigate the degree of stresses, maxillary partial edentulism (Kennedy Class II modification I) was assumed and removable partial dentures were designed on it with three kinds of metallic materials; cobalt-chromium alloy, type IV gold alloy and commercially pure (c.p.) titanium. Aker's clasp was applied on the left second molar. RPA (mesial rest-proximal plate-Aker's) clasp was on the left first premolar and wrought wire clasp was on the right first premolar. Three dimensional, non-linear, dynamic finite element analysis method was run to solve this process. Results. 1. Cobalt-chromium alloy had the highest von Mises stress value and c.p. titanium had the lowest one irrespective of the types of clasps. 2. In the Aker's clasps, stress on the retentive tips was shown shortly after the appearance of stresses of the middle and minor connector areas. These time lag was much shorter in the RPA clasps than in the Aker's clasp. 3. In general. retentive tips of wrought wire clasps had much less amount of stress than other clasps. Conclusion. The amount of stress was the highest in the RPA clasp and the lowest in the wrought wire clasp, in general.

• 한국안전학회지
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• 제24권2호
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• pp.23-29
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• 2009

The hybrid composite materials are recently used in many field as an advanced material due to their high resistance to fracture. However, hybrid composite materials have several problems, especially delamination, compared with homogeneous materials such as an aluminum alloy, etc. In this study, we carried out the tensile test to study the tension failure appearances and tensile ultimate strength of CFRP/Al/CFRP hybrid composite materials. The CFRP material used in the experiment is a commercial material known as CU175NS in unidirectional carbon prepreg. Also Al/CFRP/Al hybrid composites with three kind length of a single edge crack were investigated for the relationship between an aluminium volume fraction and a crack length. The crack length was measured by a traveling microscope under a universal dynamic tester. Futhermore the stress intensity factor behavior was examined according to a volume fraction and an initial crack length ratio to a width.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제13권3호
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• pp.7-14
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• 2007

The concept and spatial composition of office have endlessly changed according to social trend. And according to social change, members of office, namely, concept of organization has been changed. Presently, our society finds and needs appearance of office suitable for our society. According to a concept of ecological environment and a concept laying stress on human, various trials have been performed but still, stress of salaried men is treated as social issue. By having connection between psychological healing theory of Max $L{\ddot{\bar{u}}}scher$ and spatial expression elements (content : refuge, self-esteem : prospect, confidence : flow, liberty : void) as a theory, we discussed possibility of aesthetic office landscape could be developed to a type of office which could control emotion that can be a cause of stress and we intended to examine limitation and possibility through case analysis.

• 한국산학기술학회논문지
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• 제19권3호
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• pp.456-467
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• 2018

현대 사회에서 외모가 자신을 표현하는 중요한 가치로 부상함에 따라 날씬함이 아름다움의 상징으로 여겨지고 있다. 이에 본 연구에서는 여대생들의 신체상, 외모관련 사회문화적 태도, 비만 스트레스와 다이어트 행동이 체중감량 제품 복용에 미치는 영향을 조사하고자 시도되었다. 자료수집은 2017년 6월과 7월에 온라인 설문조사 프로그램을 이용하여 220명의 여대생을 대상으로 신체상, 외모관련 사회문화적 태도, 비만 스트레스와 다이어트 행동에 대해 조사하였다. 자료분석은 SPSS WIN 프로그램을 이용하여 $x^2$-test, 피어슨 상관관계 분석, 로지스틱 회귀분석을 이용하였다. 연구결과, 체중감량 제품의 복용군과 비복용군 사이에는 신체상, 외모관련 사회문화적 태도, 비만스트레스와 다이어트 행동에 유의한 차이가 있었으며, 모든 변수는 서로 유의한 상관관계가 있었다. 체중감량 제품 복용에 영향을 미치는 요인은 외모관련 사회문화적 태도(OR=1.15, CI=1.03~1.29), 비만 스트레스(OR=1.13, CI=1.06~1.20), 다이어트 행동(OR=1.21, CI=1.10~1.33)과 체중감량 제품에 대한 부작용 지식(OR=3.86, CI=1.62~9.20)으로 나타났다. 따라서 여대생을 대상으로 건강한 체중에 대한 올바른 지식과 체중감량 제품 복용이 필요한 경우, 제품의 성분, 부작용에 대한 적절한 정보전달이 이루어져야 한다.

• 한국산학기술학회논문지
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• 제17권2호
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• pp.489-500
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• 2016

본 논문은 한국 간호대학생의 외모 만족도와 대인관계 성향 및 우울간의 관계를 확인하고 우울에 미치는 영향요인을 확인하고자 한다. 연구 대상자의 연령은 17세-27세 범위이며 총 247명이 편의 추출에 의해 선정되었다. 연구는 2012년 11월 1일부터 2013년 3월 30일까지 시행하였다. 우울에 유의한 변수는 형제서열순위, 종교, 학교성적, 경제적 상태, 거주상태, 스트레스 해소방법이었다. 우울과 외모만족도, 대인관계 경향은 양의 상관관계를 가지는 것으로 나타났다. 우울에 가장 큰 영향을 미치는 것은 외형, 경제적 수준이었고, 다음으로 동정-수용적, 반항-불신적, 체형과 거주상태 순으로 모형의 수정된 결정계수(R2)는 .268 이었다. 본 연구결과는 한국 간호대학생의 우울을 이해하고 개인간 상호관계와 우울 프로그램을 개발하는데 유용한 연구가 될 것이다.

• The Plant Pathology Journal
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• 제32권4호
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• pp.300-310
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• 2016

Pathogen infection in plants induces complex responses ranging from gene expression to metabolic processes in infected plants. In spite of many studies on biotic stress-related changes in host plants, little is known about the metabolic and phenotypic responses of the host plants to Pseudomonas cichorii infection based on image-based analysis. To investigate alterations in tomato plants according to disease severity, we inoculated plants with different cell densities of P. cichorii using dipping and syringe infiltration methods. High-dose inocula (${\geq}10^6cfu/ml$) induced evident necrotic lesions within one day that corresponded to bacterial growth in the infected tissues. Among the chlorophyll fluorescence parameters analyzed, changes in quantum yield of PSII (${\Phi}PSII$) and non-photochemical quenching (NPQ) preceded the appearance of visible symptoms, but maximum quantum efficiency of PSII ($F_v/F_m$) was altered well after symptom development. Visible/near infrared and chlorophyll fluorescence hyperspectral images detected changes before symptom appearance at low-density inoculation. The results of this study indicate that the P. cichorii infection severity can be detected by chlorophyll fluorescence assay and hyperspectral images prior to the onset of visible symptoms, indicating the feasibility of early detection of diseases. However, to detect disease development by hyperspectral imaging, more detailed protocols and analyses are necessary. Taken together, change in chlorophyll fluorescence is a good parameter for early detection of P. cichorii infection in tomato plants. In addition, image-based visualization of infection severity before visual damage appearance will contribute to effective management of plant diseases.

• 콘크리트학회논문집
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• 제11권6호
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• pp.3-12
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• 1999

The larger, loftier and more highly strengthened the recent structures become, the greater attention is paid to the problem of thermal crack occurrence associate with hydration heat. As one of methods to solve the problem, a care has been taken to the improvement of construction such as the application of pre-cooling or pipe-cooling, adjustment of concrete block size, concrete placement timing, joint arrangement and so on. But it is expected that a proper selection of cement shall additionally contribute to the control of thermal cracks. In this study, thus, we selected 4 types of cements such as Type V for anti-sulphate, blast furnace cements (slag content of 45% and 65% respectively)and ternary blended low heat cement, and carried out mock-up tests. In every assigned time, temperatures and thermal stresses were measured and calculated from raw data. As a result of measurement, it was found that the magnitude of hydration heat is in order of blast furnace slag cement. Type V and ternary blended low heat cement. Results of thermal stresses were same as the order of temperature. In addition, thermal stresses calculated from the data of strain gauges showed almost similar to those measured from effective stress gauges only when strain values were adjusted properly in accordance with initial time of stress appearance. Theoretical results agreed well with the measured values comparatively, but showed slight differences. It is inferred that these differences shall be reduced if more tests capable of evaluating thermal characteristics of concrete are carried out.