• Physical Therapy Rehabilitation Science
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• 제10권2호
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• pp.197-204
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• 2021

Objective: This study is based on a parallax design before and after a non-equivalent control group to examine the effects of laughter therapy on the anxiety, depression, and stress in patients with cancer admitted to a nursing hospital. Design: A randomized controlled trial. Methods: Data collection was conducted on 34 patients who agreed to participate in the study among patients admitted to E Cancer Hospital from September to November 2018. Laughter treatment interventions were performed three times a week for 50 minutes each and a total of eight times. In this study, a tool developed by Spielberger was used to measure state anxiety, a tool developed by Beck was used to measure depression, and the Perceived Stress Scaled eveloped by Cohen was used to measure stress. Results: Anxiety was significantly lower in the experimental group than in the control group (F=10.74, p=0.003). Depression was lower in both the experimental group and the control group that did not participate in the laughter therapy intervention and was not significant (F=0.58, p=0.451). Stress was significantly lower in the experimental group than in the control group (F=4.36, p=0.045). Conclusions: The results of this study suggest that laughter therapy has a positive effect on reducing anxiety and stress in patients with cancer admitted to nursing hospitals.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2003년도 ICCAS
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• pp.1945-1950
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• 2003

Conceived to acquire personal information for an electronic medical record, the clinical interview contains probing questions. The number and type of inquiries are assumed to fulfill medical protocols, and therefore are deemed essential for treatment - but the rate can and should be controlled. High rates of inquiry merely intimidate the patient and affect replies. The purpose of this paper is to mathematically formulate permissible rates of clinical interviews held during telehomecare virtual visits and designed to avoid patient anxiety. Mental stress is derived as a function of the weight of importance assigned by the patient, virtual visit duration, and the rate of questioning in the direction of greater sensitivity. Two operations are of interest: Collecting and recording information by the provider, and maintaining synchrony of questions and answers by the patient. The Lorentz transformation yields the patient’s view of the operational rates. Conservation of information momentum is postulated and applied before and after replies are recorded. It is shown that the weight of importance designated by the patient to collecting and recording personal information is driven by a singularity that depends on the rate of questioning. The findings should serve as a guideline in interviewer training programs.

• Advances in aircraft and spacecraft science
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• 제7권5호
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• pp.459-473
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• 2020

The aircraft nose landing gear (NLG) can suffer of an unstable vibration called shimmy that is responsible of discomfort and of fatigue stress on the gear strut components. An adaptive controller is proposed in this paper to cope with the aforementioned problem. It is based on a method called Modified Simple Adaptive control (MSAC) which is able of governing the NLG motion by using a feedback signal that relies on just one output of the plant. The MSAC only asks for the passivity of the controlled plant. With this aim, a parallel feedforward compensator is employed in this work to let the system satisfies the almost strictly passivity (ASP) requirements. The nonlinear equations that govern the aircraft NLG shimmy vibration behavior are used to analyzed the controlled system transient response undergoing an initial disturbance and taking into account different taxiing speed values.

• Journal of Applied Biological Chemistry
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• 제64권1호
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• pp.39-48
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• 2021

가뭄은 작물의 성장과 생산성을 방해하는 비 생물학적 스트레스 중 하나다. 비 생물학적 스트레스에 대응하기 위해서는 식물이 불리한 환경 조건에서 스트레스에 나타내는 분자 조절 네트워크를 이해해야 한다. 비 생물학적 스트레스 (가뭄에 대응)에 대처할 수 있는 조합을 선별하기 위한 실험에서 스트레스 조건에서만 발현되는 5개의 가뭄 스트레스 유도성 프로모터를 선별하였으며, 이 중 36개의 cis-regulatory element를 선별하였다. 그 결과 가뭄 스트레스에서만 발현되는 유전자의 프로모터에서 cis-regulatory element를 새롭게 조합하여 미세 제어 조절을 할 수 있는 2 개의 합성프로모터(BL1, BL2)를 제작하였다. 합성프로모터를 포함한 형질전환식물(BL1-GUS, BL2-GUS)의 분석은 합성프로모터가 건조 조건에서 형질전환식물 내의 GUS 유전자의 발현을 증가시키는 것을 통하여 확인하였다. 또한 Transient activation assay를 통해 DREB1A와 DREB2C에 의해 합성프로모터가 활성화되는 것도 확인하였다. 이러한 결과는 가뭄 특이적인 cis-regulatory element의 조합에 의해 제작한 합성프로모터가 다양한 비 생물학적 스트레스에 반응하고, 식물의 성장 지연을 유발하지 않고 스트레스에 효과적으로 대응할 수 있을 것이라 예상할 수 있다.

• 대한기계학회논문집A
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• 제39권1호
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• pp.11-17
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• 2015

최근에 원자력 발전소 안전 3 등급 배관에 적용되고 있는 고밀도 폴리에틸렌 배관은 융착표면을가열한 후 축방향으로 가압하는 열 융착 공정을 이용하여 맞대기 융착되어진다. 이러한 열 융착공정은 맞대기 융착부에 비드 형상을 발생시킨다. 이러한 비드 형상의 응력집중에 기인하여 피로수명이 줄어들 수 있다. 따라서 피로거동에 미치는 맞대기 열 융착부 비드의 효과를 고찰하는 것이 필요하다. 본 연구에서는 응력 제어 조건 하의 인장 피로 시험과 유한요소 탄성응력 해석을 수행하여 맞대기 열 융착부의 인장 피로 거동을 고찰하였다. 고찰 결과, 중주기 및 고주기 피로 영역에선 피로수명에 미치는 비드의 영향이 미미한 반면 저주기 피로 영역에선 비드의 존재가 피로 수명을 감소시킴을 확인하였다.

• 한국식품과학회지
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• 제32권4호
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• pp.974-978
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• 2000

다섯 종류의 시판 고추장에 대한 항복응력은 vane 방법에 의해 controlled shear-rate 조건에서 측정되었다. Vane 항복응력은 전단속도와 전단응력 데이터의 외삽법(extrapolation)에 의해 결정된 Casson 항복응력 보다 높은 수치를 보여주었다. 고추장의 구조가 손상되지 않은 시료와 이미 손상된 시료에 대해 vane 방법에 의해 정적항복응력$({\sigma}_s)$과 동적항복음력$({\sigma}_d)$이 각각 측정되었으며 큰 수치 차이로부터 고추장에 대한 구조파괴 정도를 결정하는 데 있어 vane 방법이 적합함을 알 수 있었다. ${\sigma}_{ov}({\sigma}_{s},\;{\sigma}_{d})$와 ${\sigma}_{oc}$ 수치 사이에는 좋은 상관관계를 보여주고 있으며 ${\sigma}_{d}$ 수치는 외삽법에 의해 얻어진 ${\sigma}_{oc}$ 수치와 잘 일치함을 나타냈다. ${\sigma}_{s}$와 ${\sigma}_{d}$의 비율로부터 얻어진 무차원 yield number$(N{\sigma}_{o})$는 고추장의 일시적 구조 존재여부를 결정하는데 사용될 수 있다. $N{\sigma}_{o}$로부터 계산된 fator ${\varepsilon}$의 수치$({\varepsilon}=0.100-0.169)$로부터 고추장은 강한 결착구조를 형성하고 있는 분산식품임을 알 수 있었다.

• 한국정밀공학회지
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• 제23권2호
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• pp.199-206
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• 2006

Automatic grease lubricator is equipment that provides adequate amount of fresh grease constantly to the shaft and the bearings of machines. It minimizes the friction heat and reduces the friction loss of machines to the least. This research is to develop automatic grease lubricator by gear driven mechanism with controlled operation time. The ultimate design of this equipment is to lubricate an adequate amount of grease by a simple switch clicking according to the advanced set cycle. The backlash of the gear was minimized to increase the output power. To increase the power of gear mechanism, the binding frequency and the thickness of the coil were changed. To control the rotating cycles of the main shaft according to its set numbers, different resistance and chips were used to design the circuit to controls electrical signals with pulse. The body of the lubricator was analyzed by stress analysis with different constructed angle. The stress analysis for differing loading pressures applied to the exterior body of grease lubricator due to the setup angle, was found that the maximum stress was distributed over the outlet part where the grease lubricator suddenly narrowed contracts. Digital mock-up was analyzed and the rapid prototyping(RP) trial products were tested with PCB circuit and grease. The evaluation of the outlet capacity for RP trial products was conducted, because the friction caused by the outlet on the wall surface was an important factor in the operation of the equipment. Finally, the finishing process was applied to decrease the roughness of the surface to a comparable level and was able to test the performance examination for the product.

• 한국간호교육학회지
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• 제30권1호
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• pp.19-28
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• 2024

Purpose: The purpose of this study was to develop a child abuse prevention education program for parents. Furthermore, the aim was to investigate the impact of child abuse prevention education on parents' response to positive emotion, parenting stress, and potential for child abuse. Methods: A randomized controlled pretest posttest design was used. A total of 60 participants, who were parents with children aged 1~5 and attending 8 nurseries and kindergartens located in Daegu, were recruited. They were randomly assigned to an experimental group (n=30) and a control group (n=30). The collected data were analyzed by an independent t-test, paired t-test, and χ²-test along with descriptive statistics using IBM SPSS Statistics 25.0. Child abuse prevention education for the experimental group included four modules on child rights, understanding child abuse, proper child discipline, and positive parenting attitudes. Results: The experimental group showed a significant difference in positive rumination from the control group (t=2.15, p=.036). The experimental group reported a significant difference in dampening from the control group (t=-2.49, p=.016). Additionally, the experimental group reported a significant difference in parenting stress from the control group (t=-2.12, p=.038) and also reported significant differences in child abuse potential from the control group (t=-2.26, p=.028). Conclusion: The results of this study indicate that child abuse prevention education for parents can improve positive rumination, reduce dampening, and reduce parenting stress and child abuse potential. Therefore, this study is useful in demonstrating how parental susceptibility to child abuse can be decreased. Future studies should pursue long-term programs and counseling programs.

• 한국지반공학회지:지반
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• 제5권2호
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• pp.45-56
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• 1989

정규압밀 점성토의 응력-변형 거동은 응력경로에 의하여 어떠한 영향을 받게 되는가를 규명하기 위하여, 실험실에서 인위적으로 압밀한 Kaolin정성토 공시체를 사용하여 현위치 응력상태인 연. 응 역상태로 압밀하고, 여러가지 서로 다른 응력경로를 따라 삼축추축 배수시험을 행하였다. 그 결과, 응력증가비가 특정한 값, 곧 임계응력증가비를 가질 때 응력-변형 거동은 거의 녹형의 형태로 나타나고, 그 이상이 되면 응력의 증가와 더불어 재료의 성질이 강화되는 변형경화 현상을 나타내고 있음을 알 수 있었다. 본 연구에서는, 이러한 변Wi초화 현상을 보이는 응력-변형 거동을 Drnevich의 쌍유선 함수의 개념을 적용하여 모델화 하였으며, 이를 축대칭 하중을 받고있는지반의 응력경로를 고려한 여밀침하 계산에 적용하는 방법을 제시하였다.

• 대한치과교정학회지
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• 제24권3호
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• pp.721-733
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• 1994

Orthodontic tooth movement is closely related to the stress on the periodontal tissue. In this research the finite element method was used to observe the stress distribution and to find the best condition for effective tooth movement in the case of unilateral molar expansion. The author constructed the model of lower dental arch of average Korean adult and used $.032'\times.032'\times60mm$ TMA wire. The wire was deflected in the horizontal and vertical direction to give the 16 conditions. The following results were obtained ; 1. When the moment and force were controlled properly the movement of anchor tooth was minimized and the movement of moving tooth was maximized. 2. As the initial horizontal deflection increased the buccal displacement of both teeth was also increased. As the initial horizontal deflection increased the lingual movement of anchor tooth and the buccal movement of moving tooth increased. 3. When the initial horizontal and vertical deflection rate was 1.5 the effective movement of moving tooth was observed with minimal displacement of anchor tooth.