• 디자인학연구
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• 제14권
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• pp.181-191
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• 1996

$\ulcorner$ID생산성$\lrcorner$이란 $\ulcorner$인더스트리얼 디자인$\lrcorner$(Industrial Design; 이하 ID로 약칭)과 $\ulcorner$생산성$\lrcorner$(Productivity)을 결합한 용어로서 그 개념은 상품의 디자인개발에 투입된 모든 디자인자원 및 요소의 효율적인 이용도를 나타내는 지표로 설명될 수 있다. $\ulcorner$ID생산성$\lrcorner$은객관 적인 방법과 주관적인 방법 두 가지 측면에서 측정 할 수 있다. 전자는 투입과 산출의 관계를 가능한 객관적, 정량적으로 분석한다는 방식이며, 후자는 ID의 방법 자체가 극히 주관적이라는 특성을 전제로 하여 $\ulcorner$ID생산성$\lrcorner$을 가능한 한 정상적으로 분석하는 방법이다. 전자는 디자인 시간, 디자이너 수 , 경비를 공통의 투입요소로 사용하여 개인별.요소별.디자인문문 전체의 디자인 생산성 측정 그 자체가 불가능하며 신뢰성이 없는 단점이 있다. 후자는 Good Design을 산출요소로 사용하여 개인 및 디자인 부문 전체의 합리적 디자인 생산성 측정이 가능한 반면, 주관적 평가를 위한 설문조사나 분석방법 절차 등이 번거러운 단점이 있다. 그러나 이 방법은 전자보다는 매우 합리적이며 신뢰도가 높다는 이점이 있다.

• 한국산학기술학회논문지
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• 제12권11호
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• pp.5071-5078
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• 2011

본 연구는 취약계층 재가노인의 기능적 건강상태와 맞춤형 방문건강관리 서비스 만족도 및 삶의 질과의 관계를 검증하기 위한 것이다. 자료수집은 D시 B구 1개 지역보건소 방문보건센터에 등록되어 있는 65세 이상 노인 399명을 대상으로 보건보직부에서 권고하여 맞춤형 방문건강관리서비스 기록지에 사용하고 있는 측정도구를 이용하여 2010년 6월부터 9월까지 하였다. 자료분석은 SPSS 17.0 프로그램을 이용하여 t-test, one-way ANOVA, Pearson correlation coefficients를 검증하였다. 연구결과, 기능적 건강상태와 삶의 질, 맞춤형 방문건강관리서비스 만족도와 삶의 질에서 정적 상관관계가 있었으며, 기능적 건강상태와 맞춤형 방문건강관리 서비스 만족도는 상관관계가 없었다. 결론적으로, 맞춤형 방문건강관리 사업의 효과적인 관리를 위한 기초 자료로 활용될 수 있을 것이다.

• 한국융합학회논문지
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• 제10권5호
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• pp.85-94
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• 2019

본 연구는 체간안정화 운동인 복부 드로잉-인 기법을 융합한 가슴압박이 요통예방과 가슴압박 질에 미치는 영향을 분석하기 위해 119구급대원(응급구조사) 15명을 대상으로 동작분석, 근전도, 가슴압박 질을 분석하였다. 자료는 SPSS 21.0으로 정규분포(Kolmogorov-Smirnov 및 Shapiro-Wilk 검정)을 실시하였고 가슴압박 형태에 따른 전 후 대응표본 T 검정(paired T-test), 측정시점 차이분석은 일원배치 분산분석(one-way ANOVA), 사후검증은 LSD를 활용하였다. 연구결과 복부 드로잉-인 상태로 가슴압박을 하면 근활성도 및 가슴압박 성공률에서 유의한 차이를 보였다. 따라서 향후 구급대원의 요통을 예방하면서 가슴압박 성공률도 높일 수 있는 심폐소생술 교육에 대한 연구가 필요하다.

• 대한물리의학회지
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• 제16권4호
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• pp.13-21
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• 2021

PURPOSE: This study examined the effects of action observational training with acoustic stimulation (AOTA) on the balance and gait ability in stroke patients. METHODS: Forty-five chronic stroke patients were divided into three groups. The AOTA group (n = 15) received training via a video that showed a normal gait with the sound of footsteps. The action observation training (AOT) group (n = 15) received AOT without acoustic stimulation. The control group (n = 15) received physical training. Each intervention was applied once per day, three times per week for six weeks. The participants in the AOTA and AOT groups had five minutes of AOT. The participants in the all group had 20 minutes of physical training. All participants were measured using the Berg Balance Scale, the Timed Up and Go Test, the Functional Reaching Test, 10 Meter Walk Test, six Minute Walk Test, and Dynamic Gait Index. The collected data were analyzed using SPSS version 20.0 for Windows. The between- and within-group comparisons were analyzed using the one-way analysis of variance (ANOVA) test and a paired t-test, respectively. For all statistical analyses, the significance level was set to .05. RESULTS: The one-way ANOVA test identified significant differences among the measurement results of the three groups (p < .05). Post hoc analyses indicated the AOTA group to undergo more significant balance and gait changes than the control group (p < .05). CONCLUSION: The gait and balance abilities could be improved effectively for patients with stroke when action observation training and acoustic stimulation were applied simultaneously.

• 센서학회지
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• 제17권2호
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• pp.87-94
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• 2008

Blood pressure (BP), one of the most important vital signs, is used to identify an emergency state and reflects the blood flow characteristics of the cardiovascular system. The conventional noninvasive method of measuring BP is inconvenient because patients must wear a cuff on their arm and the measurement process takes time. This paper proposes an algorithm for estimating the BP using the pulse transit time (PTT) of the photoplethysmography (PPG) and pressure pulse from finger at the same time as a more convenient way to measure the BP. After recording the electrocardiogram (ECG), measuring the pressure pulse, and performing PPG, we calculated the PTT from the acquired signals. Then, we used a multiple regression analysis to measure the systolic and diastolic BP indirectly. Comparing the BP measured indirectly using the proposed algorithm and the real BP measured with a sphygmomanometer, the systolic pressure had a mean error of ${\pm}3.240$ mmHg and a standard deviation of 2.530 mmHg, while the diastolic pressure had a satisfactory result, i.e., a mean error of ${\pm}1.807$ mmHg and a standard deviation of 1.396 mmHg. These results are more superior than existing method estimating blood pressure using the one PTT and satisfy the ANSI/AAMI regulations for certifying a sphygmomanometer i.e., the measurement error should be within a mean error of ${\pm}5$ mmHg and a standard deviation of 8 mmHg. These results suggest the possibility of applying our method to a portable, long-term BP monitoring system.

• 대한물리치료과학회지
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• 제25권1호
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• pp.44-51
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• 2018

Background: In this paper, the relationship between the Cranio-Vertebral Angle (CVA) and the vital capacity in each position is reviewed, and the vital capacity in the position is studied. Methods: This study targeted 20 non-smoking female students of U university, which is located in Gyeongju-si. To review the Forward Head Posture (FHP) of each subject, CVA was measured, and FVC, FEV1, and FEF (25-75%) were measured and analyzed using a spirometer. Subjects were ordered to exhale three times with ease and then inhale up to their total lung capacity. After then, they were requested to exhale longer than six seconds. Then the inspiration and expiration were repeated. The measurement was executed in three positions, including supine, prone, and sitting. In each position the measurement was repeated twice, and a one-minute break was given between each cycle, so it was measured six times in total. SPSS 14.0 for Windows was used to analyze the data. The subjects' general properties were analyzed using descriptive statistics, and the correlation between the angle and the respiration variable result in each position was analyzed. The result of the respiration variable in each position was analyzed using the one-way ANOVA, and then a Scheffe post-hoc comparison was executed. Results: According to the analysis result of the correlation between the angle and respiration variable in each position, the sitting position and FEF (25-75%) showed a positive correlation (P<0.05). The respiration variable in each position showed a significant difference in FVC (p<0.05), and the Scheffe post-hoc comparison differed in prone and sitting positions. Conclusion: To increase the FVC of FHP patients, different exercises for each position can be applied, and the result of this study can be utilized as background data for further research.

• 산업경영시스템학회지
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• 제43권3호
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• pp.53-60
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• 2020

Evaluating the operational efficiency of electric vehicle charging stations (EVCSs) is important to understand charging network evolution and the charging behavior of electric vehicle users. However, aggregation of efficiency performance metrics poses a significant challenge to practitioners and researchers. In general, the operational efficiency of EVCSs can be measured as a complicated function of various factors with multiple criteria. Such a complex aspect of managing EVCSs becomes one of the challenging issues to measure their operational efficiency. Considering the difficulty in the efficiency measurement, this paper suggests a way to measure the operational efficiency of EVCSs based on data envelopment analysis (DEA). The DEA model is formulated as constant returns of output-oriented model with five types of inputs, four of them are the numbers of floating population and nearby charging stations, distance of nearby charging stations and traffic volume as desirable inputs and the other is the traffic speed in congestion as undesirable one. Meanwhile, the output is given by the charging frequency of EVCSs in a day. Using real-world data obtained from reliable sources, we suggest operational efficiencies of EVCSs in Seoul and discuss implications on the development of electric vehicle charging network. The result of efficiency measurement shows that most of EVCSs in Seoul are inefficient, while some districts (Nowon-gu, Dongdaemun-gu, Dongjak-gu, Songpa-gu, Guro-gu) have relatively more efficient EVCSs than the others.

• 한국간호교육학회지
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• 제21권2호
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• pp.266-275
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• 2015

Purpose: The aim of this study was to evaluate the effect of student question-centered lessons for bi-directional faculty-student communication. Methods: This study performed one-group pretest-posttest design; participants were university students majoring in health science (nursing 58, physical therapy 45) in city C. Data was collected and the program was conducted from March 3 to June 14, 2014. Measurements employed were the ARCS model of motivational design, self-assertiveness, learning satisfaction, and interpersonal relationship. Data was analyzed through frequency statistics, descriptive statistics, and repeated measurement of one-way analysis of variance with the SPSS 19.0 program. Results: In this student question-centered lesson participants exhibited significant enhanced satisfaction in terms of learning motivation, learning satisfaction, self-assertiveness, behavioral assertiveness, general assertiveness, and sensibility regarding interpersonal relationships. Conclusion: The results suggest that student question-centered lessons are applicable to a variety of subjects. Also, for comparative purposes, a faculty-centered lesson will be undertaken.

• 중환자간호학회지
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• 제10권3호
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• pp.53-64
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• 2017

Purpose : This study investigated the effects of active warming using a Warm Touch warming system or a cotton blanket in postoperative patients after general anesthesia for abdominal surgery. Methods : This quasi-experimental study utilized two experimental groups and one control group: a cotton-blanket group (n = 25) were warmed with a cotton blanket and a sheet; a forced-air warming group (n = 24) were warmed with a Warm Touch warming system, a cotton blanket, and a sheet; and a control group (n = 25) were warmed with a sheet. Measurement variables were postoperative pain, body temperature, and thermal discomfort. Data were analyzed using a one-way ANOVA, ${\chi}^2-tests$, Fisher's exact test, and a repeated measures ANOVA. Results : The effects of active warming using a Warm Touch warming system and a cotton blanket on postoperative patients was significant in reducing pain (F = 13.91, p < .001) and increasing body temperature (F = 12.49, p < .001). Conclusion : Active warming made a significant difference in pain and body temperature changes. Active warming methods may help patients' postoperative recovery and prevent complications. Further research is needed to explore the effects and side effects of active warming on recovering normothermia.

• 대한기계학회논문집
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• 제18권4호
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• pp.920-932
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• 1994

The combustion phenomena of a reciprocating engine is one of the most important processes affecting performance and emissions. One effective way to improve the engine combustion is to control the motion of the charge inside a cylinder by means of optimum induction system design, because the flame speed is mainly determined by the turbulence at compression(TDC) process in S.I. engine. It is believed that the tumble and swirl motion generated during intake breaks down into small-scale turbulence in the compression stroke of the cycle. However, the exact nature of their relationship is not well known. This paper describes cycle resolved LDV measurement of turbulent flow inside the cylinder of a 4-valve engine under motoring(non-firing) conditions, and studies the effect of intake port configurations on the turbulence characteristics using following parameters ; Eulerian temporal autocorrelation coefficient, turbulence energy spectral density function, Taylor micro time scale, integral time scale, and integral length scale.