• 한국도로학회논문집
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• 제14권5호
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• pp.75-83
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• 2012

PURPOSES: Suggestion of asphalt binder constitutive model based on time-temperature superposition principle and overstress concept in order to describe behavior of asphalt binders. METHODS: A series of temperature sweep tests and multiple stress creep and recovery(MSCR) tests are performed to verify the applicability of time-temperature superposition principle(t-Ts) and to develop viscoelastoplastic constitutive equation based on overstress concept. For the tests, temperature sweep tests at various high temperature and various frequency and MSCR test at $58^{\circ}C$, $64^{\circ}C$ $70^{\circ}C$, $76^{\circ}C$, and $82^{\circ}C$ are performed. From the temperature sweep tests, dynamic shear modulus mastercurve and time-temperature shift function are built and the shift function and MSCR at $58^{\circ}C$ are utilized to determine model coefficients of VBO model. RESULTS: It is observed that the time-temperature shift function built at low strain level of 0.1% is applicable not only to 1.0% strain level temperature sweep test but also maximum 500,00% strain level of MSCR test. As well, the modified VBO model shows perfect prediction on MSCR measured strain at the other temperatures. CONCLUSIONS: The Time-temperature superposition principle stands hold from very low strain level to very high strain level and that the modified VBO model can be applicable for various range of strain and temperature region to predict elastic, viscoelastic, and viscoplastic strain of asphalt binders.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 1999년도 춘계학술대회논문집
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• pp.135-139
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• 1999

The static softening behavior of AISI 4140 could be characterized by the hot torsion test in the temperature ranges of 10$0^{\circ}C$~120$0^{\circ}C$ and strain rate ranges of 0.05/sec~5/sec. Deformation efficiency which was based on dynamic materials model was calculated from flow stress curves obtained continuous deformation. Interrupted deformation was performed with 2 pass deformation in the pass strain ranges of 0.25{{{{ epsilon _p}}}} ~3{{{{ epsilon _p}}}} and interrupted time ranges of 0.5~100sec. The dependences of process variables pass strain ({{{{ epsilon _i}}}}) stain rate ({{{{ {. } atop {$\varepsilon$ } }}}}) temperature (T) and interpass time ({{{{ {t }_{i } }}}}) on static recrystallization (SRX) and metadynamic recrystallization .(MDRX) could be indicidually predicted from the modified Avrami's equations. Comparison of the softening kinetics between MDRX and SRX showed that the rate of MDRX was more rapid than that of SRX for the same deformation variables. Controlled multipass deformations were performed using deformation efficiency static and metadynamic recrystallization of AISI 4140.

• 대한간호학회지
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• 제33권5호
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• pp.538-543
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• 2003

Purpose: The purpose of this study was to identify the stress and the coping methodes in the cancer patients and their caregivers. Method: The stress method was measured by V AS(Visual Analogue Scale). The coping methodes was measured using the modified Ways of Coping Questionnaire. The phases of patient illness consisted of Ist(initial) stage, and 2nd(recurred) stage and 3rd(terminal) stage based on Lewandowski & Jones(1988) method. The data were collected by a survey of convenience sampling of 257 cancer patients and 196 of their caregivers from two hospitals in Seoul. The data were analyzed using paired t-test, unpaired t-test. Result: The stress level of cancer patients was lower than their caregivers. The cancer patients used emotion-focused coping mode than problem-focused coping mode. The caregivers problem-focused coping mode over emotion-focused coping mode. In the problem-focused coping mode, the caregivers significantly used two coping strategies that were ‘positve cope’, ‘information seeking’ more than patients. In emotion-focused coping mode, the caregivers significantly used one coping strategies that was ‘wish’ more than patients. The patients tended to used two coping strategies that were ‘blame’ and ‘emotion expression’ more than the caregivers. Conclusion: Further study needs to be done to positively identify these coping methods and develop interventions to assist patients and their caregivers.

• 종양간호연구
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• 제12권1호
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• pp.20-26
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• 2012

Purpose: The purpose of this study was to identify the stress and the coping strategies in breast cancer patients and their spouses. Methods: The stress level was measured by the Stress Questionnaire of Andersson & Albertsson (2000). The coping strategies were measured by the modified Lazarus & Folkman's Ways of Coping Questionnaire. The data were collected by a survey sampling 49 couples from one hospital in Seoul. The data were analyzed by t-test, ANOVA and paired t-test. Results: There was no significant differences between the stress level of breast cancer patients and their spouses. The problem-focused coping of breast cancer patients was significant higher than their spouses. The cancer patients and their spouses used problem-focused coping mode more than emotion-focused coping mode. In the problem-focused coping mode, breast cancer patients used two coping strategies - 'seeking information' and 'cognitive reconstruction' - significantly more than their spouses. In emotion-focused coping mode, the breast cancer patients used one coping strategy, 'emotional expression', significantly more than the their spouses. Conclusion: Further study needs to attempt to develop nursing interventions that could improve positive coping strategies.

• The Journal of Korean Physical Therapy
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• 제30권2호
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• pp.58-62
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• 2018

Purpose: This study evaluated the effects of respiratory muscle training on respiratory function, balance, and activities of daily living (ADL) in patients with stroke. Methods: The study included 21 patients with stroke, divided into the experimental group and control group. Both groups underwent traditional physical therapy once a day for 30 minutes, five times weekly for 6 weeks. The experimental group underwent additional respiratory muscle training once a day, five times a week during the study period. Maximal inspiratory pressure (MIP), maximal expiratory pressure (MEP), Berg balance scale (BBS), and Korean-modified Barthel index (K-MBI) were measured before and after the study period. For statistical analysis, paired t-test was used to compare the difference between the pre and post values. Independent t-test was used compare the differences between groups. Results: Both groups had significantly improved MIP, MEP, BBS, and K-MBI scores after the study period. The experimental group had significantly improved MIP, MEP, BBS, and K-MBI scores. Conclusion: These results suggest that respiratory muscle training improves respiratory function, balance, and ADL in patients with stroke.

• 부모자녀건강학회지
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• 제9권2호
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• pp.150-160
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• 2006

Purpose: This study was to examine how an invasive procedures education program affected the anxiety and supportive behavior of mothers with hospitalized children, and to help provide an efficient to improve their maternal role performance by boosting their supportive behavior. Method: To evaluate their anxiety, Spilberger(1972)'s Anxiety Inventory that was translated by Kim Jeong-taek, et al.(1978) was employed, and Weon Dae-yeoung(1999)'s modified version of Melnyx(1994)'s Index of Parent Support During Instructive Procedure was utilized to assess their supportive behavior. The collected data were analyzed with SPSS program. Statistical data on real number and percentage were acquired, and $x^2$-test and t-test were conducted. Result: There was a more favorable change in the anxiety(trait anxiety and state anxiety) of the experimental group that participated in an invasive procedures education program(a mean of -0.14) than in that of the control group that didn't(a mean of 0.16). The experimental group(an average of 4..65) outstripped the control group(a mean of 3.42) in that regard. Conclusions: The invasive procedures education program that catered to the mothers with hospitalized children turned out to be effective in easing their anxiety and enhancing their supportive behavior.

• 설비공학논문집
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• 제20권11호
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• pp.733-738
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• 2008

Due to environmental concerns $CO_2$ has been reintroduced as a potential candidate to replace HFCs in refrigeration systems. Oils are always required in a vapor-compression cycle, and thus it is necessary to precisely estimate the thermodynamic mixture properties of $CO_2$-lubricant oil. In the present study, the density and the viscosity of the mixture was calculated by the Redlich and Kwong type EoS and the modified Peng and Robinson type viscosity EoS, respectively. The viscosity model was based on the similarity between P-v-T and T-$\mu$-P relationships. The predicted results were compared with the experimental data of Pens ado et al. whose test conditions were 100$\sim$650 bar of pressure and 303 K$\sim$353 K of temperature with the $CO_2$-POEs mixtures under 92.2 wt.% and 83.3 wt.% of $CO_2$ concentration. The mean deviations of the mixture density were 7.93% and 8.32% for 92.2 wt.% and 83.3 wt.% of $CO_2$ concentration, respectively. Concerning the viscosity, the mean deviations were 4% and 10% for 92.2 wt.% and 83.3 wt.% of $CO_2$ concentration under the Pensado et al.'s test conditions.

• 기본간호학회지
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• 제24권2호
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• pp.128-137
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• 2017

Purpose: This study was conducted to investigate the effects of core basic nursing education using cellular phone video recordings on self-confidence in performance, achievement, and practice satisfaction. Methods: The research design was a nonequivalent control group modified and non-synchronized design. The participants were assigned to either the experimental (n=60) or control group (n=67). During one semester, the experimental group received training for 10 selected core basic nursing skills using cellular phone video recording. The control group, also for one semester, received training with traditional practices. Self-confidence in performance and practice satisfaction were measured using a questionnaire, and achievement was evaluated by professors at the conclusion of the semester. Collected data were analyzed using t-test and Pearson correlation coefficients. Results: Self-confidence in performance increased significantly after training in the experimental group (t=7.94, p<.001). The experimental group showed significantly higher self-confidence in performance (t=2.39, p=.018) and achievement (t=2.40, p=.018) compared to the control group. However, the difference in practice satisfaction was not statistically significant. Conclusion: The results indicate that cellular phone video recording is effective in improving self-confidence in performance and achievement of core basic nursing skills.

• 대한한방체열의학회지
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• 제3권1호
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• pp.6-14
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• 2004

Purpose: We intended to research the relations between abdominal temperature and primary dysmenorrhea severity. Methods: We selected the 95 primary dysmenorrhea patients by means of screening test (first screening test-inquiry, second screening test-clinical test, additionally Waist-to-Hip ratio (WHR) by Inbody 2.0). We measured 4 points abdominal temperature (Chon-jung(CV17), Chung-wan(CV12), Kwan-won(CV4), Chung-guk(CV3)) by DITI (DOREX Inc., USA). And then we checked the difference of temperature $({\Delta}T)$ between CV17 and CV4 / CV17 and CV3 / CV12 and CV4 / CV12 and CV3. After that, we compared ${\Delta}T$ with primary dysmenorrhea severity evaluated by multidimensional scales (verbal rating scale modified from the one devised by Bibe roglu & Berhrman(VRS; B&B), multidimensional verbal rating scale by Andersch & Milsom(MVRS)). In dysmenorrhea severity, we standardized scale score and 3-group-severity by score (mild, moderate, severe). For statistics, we used Pearson correlations and Spearman's rho correlations, SPSS 11.0 for windows. Results: In case of MVRS, MVRS score and 3-group-severity were not correlated to ${\Delta}T$. In case of VRS; B&B, VRS; B&B score was correlated to ${\Delta}T$ (CV12 and CV4 / CV12 and CV3) and 3-group-severity was correlated to ${\Delta}T$ (CV12 and CV3). Statistically they showed significant result (p<0.05). So we can consider that ${\Delta}T$ (CV12 and CV3) and the primary dysmenorrhea severity by VRS; B&B are most correlated. Conclusion: The primary dysmenorrhea patients showed that severity by VRS; B&B was connected with ${\Delta}T$ (CV12 and CV3). So we can consider DITI as primary dysmenorrhea evaluation instrument and must further research measurement points for the exact primary dysmenorrhea evaluation by DITI.

• 한국콘텐츠학회논문지
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• 제16권11호
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• pp.444-455
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• 2016

본 연구의 목적은 동기강화상담 프로그램이 중학생들의 금연지식, 금연태도 및 금연행위에 미치는 효과를 파악하는 것이다. 본 연구의 대상자는 G광역시에 소재한 M중학교 3학년 21명(실험군)과 D중학교 3학년 21명(대조군), 총 42명이었다. 본 연구의 독립변인인 동기강화상담 프로그램은 Valasquez(2001)가 개발하고 임애리(2010)가 재구성한 집단 형태의 동기증진면담 매뉴얼을 본 연구자가 수정 보완하였으며, 프로그램의 효과는 금연지식, 금연태도, 일일흡연량 및 금연변화단계 척도를 사용하여 평가하였다. 수집된 자료는 SPSS 21.0을 이용하여 백분율, t-test 등을 통해 분석하였으며, 연구 결과는 다음과 같다. 동기강화상담 프로그램에 참여한 실험군은 참여하지 않은 대조군보다 금연지식(t=8.99, p=.000), 금연태도(t=2.77, p=.008) 및 금연변화단계점수(t=3.85, p=.000)가 통계적으로 유의하게 증가하였으며 일일흡연량(t=-3.68, p=.001)이 통계적으로 유의하게 감소하였다. 따라서 동기강화상담 프로그램은 청소년들의 흡연예방과 금연 및 정신건강증진을 위한 유용한 정신간호중재로 사용될 수 있으리라 사료된다.