• Journal of Biosystems Engineering
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• 제15권3호
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• pp.219-229
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• 1990

The compression creep behavior of grains when loaded depends not only on load but also on duration of load application. The most common methods of studying the load-time characteristics of agricultural products is by employing rheological models such as Burger's model. However it is sometimes not sufficient to describe the viscoelastic behavior of grains to be Burger's model. For this reason, this study was conducted to develop the rheological model which represented the creep compliance response of the rough rice kernel and was a function of initial stress applied and time. The effects of the initial stress applied and the moisture content on the compression creep behavior of the rough rice kernel were analyzed. The results were obtained from the study as follows: 1. Since the viscoelastic behavior of the rough rice kernel was nonlinear, the transient and steady state creep compliance was satisfactorily modelled as follows: $$J({\sigma},t)=A{\sigma}^B[C+Dt-exp(-Ft)]$$ But, for the every stress applied, the compression creep behavior of the samples tested can be well described by Burger's model respectively. 2. The creep compliance, the instantaneous elastic strain, the retarded elastic strain and the viscous strain of the sample tested generally increased in magnitude with increasing the applied initial stress and the moisture content used in the tests. At low moisture content, the creep compliance for the Japonica-type rough rice kernel Was a little higher than those for Indica-type and at high moisture content, vice versa at high moisture content. 3. The retardation times of the samples had not an uniform tendency by the initial stress and the moisture content. The retardation times ranged from 0.66 to 6.76 seconds, and the creep progressed from transient to steady state at a relatively high rate. 4. The less viscous strain than the instantaneous elastic strain for the samples tested indicated that rough rice kernel behaved as a viscoelastic body characterized by elasticity than viscosity.

• Journal of Acupuncture Research
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• 제17권2호
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• pp.209-220
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• 2000

Spasticity, an abnormal increase in resting muscle tone, is one of the most common symptoms of stroke, and its management is becoming a major issue in rehabilitation. The aims of this study are to determine the effects of electroacupuncture(EA), TENS and neuromuscular electric stimulation(NMES) on spasticity, as well as the possibility of tissue comliance method as a spasticity scale. 45 stroke patients participated in a study of the effects on hemiplegic spasticity of EA, TENS and NMES. Spasticity was measured by modified Ashworth scale on the upper extremity and tissue compliance measurement, penetration mm/kg, on Susamni(LI10) area at just before and after stimulation, and 30 minutes, 1 hour, 2 hours and 24 hours after stimulation. The acupuncture points were applied to Kokchi(LI11), Susamni(LI10), Hapkok(LI4) and Oegwan(TE5) of the affected limb. The electrodes were placed unilaterally on LI11 to LI10 and TE5 to LI4. EA with biphasic wave, 60Hz, 0.4 msec pulse duration and low intensity was applied continuously for 20 minutes. TENS with high frequency, low intensity was applied. NMES was applied with spasticity program for 20 minutes. Each electric stimulation was done on extensor muscles group of forearm for 20 minutes. EA and NMES groups were found to produce a statistically significant decrease(p〈0.05) of spasticity and these effects lasted up to 30 minutes after stimulation. There was no definite correlation between the modified Ashworth scale and tissue compliance measurement. But tissure compliance method was found to be possible as a quantitative measurement on spasticity. There was no significant correlation between the effects of EA and NMES and the characteristics of patient, but significant correlation between the effects of EA and NMES and the modified Ashworth scale.

• Journal of Preventive Medicine and Public Health
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• 제34권4호
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• pp.417-426
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• 2001

Objectives : To analyse the psychosocial factors associated with hypertension management(drug treatment and life style modification) of newly detected cases and to understand and assess their behavioral intention or behaviors. Methods : The survey area was a combined urban and rural area in Chungnam province, Korea, and the sampling method was cluster sampling. Study subjects included 541 newly detected cases of hypertension rated above stage 2 by JNC-VI from a community survey. The first survey was applied to 383 of these patients in order to discern their psychosocial characteristics. A follow-up survey was given to 345 persons with an 11-month interval following monthly telephone counseling concerning medication and life style modification by trained nurses. The final study subjects for analysis comprised 271 persons after excluding cases of incomplete data and change of address. Results : Among the 85(33.2%) new patients who had intended to undergo drug treatment, 30(35.3%) persons were treated with antihypertensive agent after 11 - month interval, while among the patients with no intention to receive treatment, only 36(21.1%) persons were treated. Hypertensive patients with a high intention score revealed a high score in life style modification compliance as well. Seventy three percent of the variance of behavioral intention to undergo hypertension management was explained by the patients attitude toward performing the behavior and subjective norm associated with behaviors related to the theory of reasoned action in structural modeling. Actual behaviors related positively with behavioral intention. The coefficient of determination was 0.255. Conclusion : Improving the compliance level of hypertensive patients in respect to drug treatment or life style modification requires a build up of positive behavioral intention, and caregivers must pay more attention to eventually converting behavioral intention to actual behaviors.

• 정보보호학회논문지
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• 제32권3호
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• pp.575-590
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• 2022

최근, 조직들은 정보보안 정책 및 기술 도입을 통해 정보보안 위협으로부터 정보자원을 보호하기 위한 투자를 높이고 있다. 하지만, 정보보안 사고는 조직 외부의 침입과 내부의 노출 등 다양하게 발생하고 있다. 본 연구는 조직내부자의 정보보안 업무 스트레스가 미치는 부정적 영향을 제시하고, 업무 스트레스 감소를 위한 조직 및 개인 관점의 요인을 제시하였다. 본 연구는 정보보안을 도입하여 운영하는 기업의 근로자들을 대상으로 설문을 하였으며, 329개의 표본을 활용해 가설을 검증하였다. 가설 검증 결과, 정보보안 조직 공정성이 업무 스트레스를 완화하고, 긍정심리자본을 강화하여 조직원의 정보보안 준수 의도에 영향을 주었다. 또한, 긍정심리자본이 개인의 정보보안 관련 스트레스와 준수 의도 간의 관계를 조절하였다. 본 연구는 조직원의 정보보안 준수 행동에 영향을 주는 조건을 조직환경 및 개인 특성 측면에서 제시함으로써, 조직이 목표하는 보안 수준 달성에 기여할 것으로 판단한다.

• 한국물환경학회지
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• 제16권4호
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• pp.431-443
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• 2000

Water quality data from water treatment plants in Korea during 1994-1998 were investigated to find out the characteristics of their non compliance. The number of plants surveyed were approximately 600 and the number of samples were over 30,000. Ten parameters of water quality selected in this study and their non compliance % (inside parenthesis) were as follows: Heterotrophic plate count (0.14%), Total coliforms (0.08%), $NH_3$-N (0.29%), $NO_3$-N (0.14%), THMs (0.02%), Turbidity (0.11%), Residual chlorine (5.5%), $KMnO_4$ consumption (0.04%), Hardness (0.03%), pH (0.07%). These levels of non compliance were compared to those obtained from WIDB (Water Industry Database, 1996) of American Water Works Association. This study strongly supported that small water plants (<10,000 tons/day) were more vulnerable in meeting the regulation criteria of many water quality parameters such as Heterotrophic plate count. Total coliforms, $NO_3$-N, THMs, Turbidity, Residual chlorine, $KMnO_1$ consumption, Hardness and pH. The $NH_3$-N concentration was especially high in winter and its violation was frequently found in the specific areas such as the downstream of major rivers. The average THMs concentration was surprisingly low, indicating $13{\mu}g/L$ which is 43% of US. Accordingly, these characteristics must be reflected in establishing the effective management of water quality policy of drinking water in Korea.

• 대한기계학회논문집A
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• 제25권5호
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• pp.765-771
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• 2001

Elastic-plastic fracture toughness JIC can be used a s an effective design criterion in elastic-plastic fracture mechanics. Among the JIC test methods approved by ASTM, unloading compliance method was used in this study. In order to examine the relationship between fracture behavior of JIC test and AE signals, the post processing of AE signals has been carried out by Short Time Fourier Transform(STFT), one of the time-frequency analysis methods. The objective of this study is to evaluate the application of characterization of AE signals for unloading compliance method of JIC test. As a result of time-frequency analysis, we could extract the AE from the raw signal and analyze the frequencies in AE signal at the same time. AE signal generated by elastic-plastic fracture of material has some different aspects at elastic and plastic ranges, or the first portion of crack growth by fracture. First of all, increased energy recorded and detected by using AE count method increase rapidly from the start of ductile fracture. The variation of main frequency range with time-frequency analysis method could be confirmed. We could know fracture behavior of interior material by examination AE characteristics generated in real-time when elastic-plastic fracture occurred in material under loading.

• 환경영향평가
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• 제24권5호
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• pp.397-406
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• 2015

2013년 시행된 유역하수도정비계획에서는 유역별 수질상황을 고려하여 하수처리시설별 방류수 수질 준수농도(기준)를 별도로 적용하는 것이 가능하다. 유역의 중권역 목표기준 또는 수질오염총량관리 목표수질을 달성하기 위하여 유역하수도 제도 도입에 따라 유역 내 지역별 시설규모별 하수처리시설에 대한 방류수 수질 준수농도(안)을 설정하는 것이 필요하다. 유역환경청에서 수립하고 있는 유역하수도정비계획 수립 시 공공하수처리시설 방류수 수질 준수농도(기준)을 설정하는데 있어 II지역인 미호천유역의 경우 BOD 5 mg/L에서 3 mg/L, II III지역이 혼재되어 있는 영산강 상류유역의 경우 BOD 5~10 mg/L에서 3 mg/L로, IV지역인 안성천유역의 경우 BOD 10 mg/L에서 5 mg/L로 일률적으로 강화하도록 계획하고 있다. 이렇게 일률적으로 정하고 있는 준수농도에 대해 하수 처리기술, 유역특성을 고려한 유역하수도 공공하수처리시설의 방류수 수질 준수농도를 설정하는 방법을 제시하는 것이 필요하다. 본 연구에서는 공공하수처리시설 방류수 수질 준수농도 강화(안)을 설정할 때 이 강화된 준수농도가 공공수역 수질에 미치는 영향을 평가하여 어떤 강화(안)이 유역관리에 좀 더 효과적인지 고찰하였다.

• 한국기술혁신학회:학술대회논문집
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• 한국기술혁신학회 2012년도 추계 학술대회 논문집
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• pp.5-18
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• 2012

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2002년도 ICCAS
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• pp.36.1-36
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• 2002

$\textbullet$ Actuator based on dielelectric elastomer $\textbullet$ Antagonistic configuration $\textbullet$ Musclelike characteristics $\textbullet$ Quasi-static and dynamic analysis $\textbullet$ Compliance control $\textbullet$ Robotic actuators

• 한국산학기술학회논문지
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• 제11권5호
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• pp.1897-1904
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• 2010

본 연구는 행정자료인 건강보험 및 의료급여비용 청구자료를 이용하였으며, 일개지역(2개도, 남 북)에 개설되어있는 전체 의료기관을 대상으로 진료일 기준 '08.7월~'08.12월(184일)동안 외래 방문이 1회 이상인 30세 이상의 수진자 432,915명을 대상으로 하였다. 투약순응도와 영향 요인을 분석한 결과 아래와 같다. 연구대상자의 투약순응도 평균은 61.5%로 나타났으며, 이는 분석대상기간 6개월(184일)동안 약 113일 정도 처방 받았음을 의미하며, 투약순응군 비율은 13.0%에 불과하였다. 고혈압상병(주 부상병)으로 외래를 방문한 평균 횟수는 4.3일, 방문한 기관수는 평균 1.1곳이었고, 한곳의 의료기관만을 이용한 환자가 전체의 94.9%로 나타났다. 당뇨병을 동반상병으로 가지고 있는 환자가 11.6%로 가장 많았고 고혈압 환자의 23.3%가 동반상병을 가지고 있었다. 투약순응도는 남성, 건강보험 가입자, 종합전문을 주이용기관으로 이용하는 환자, 동반상병을 가지고 있는 환자에서 높게 나타났으며, 65-74세까지 투약 순응도가 증가하다가 그 후 감소하는 경향을 보였다. 투약순응도에 영향을 미치는 요인으로는 남성, 55-64세, 건강보험 가입자가, 종합전문, 종합병원, 보건기관을 주 이용기관으로 방문하는 환자와 심장질환, 당뇨병을 동반상병으로 가지고 있는 환자에서 투약순응도가 높았다. 이상의 연구결과 투약 순응도가 낮은 환자에 대한 다양한 요인분석이 필요하며, 투약 순응도를 높이기 위한 고혈압관리사업의 정책적 검토 및 대안이 필요할 것이다. 또한 고혈압 환자의 경우 당뇨 등 동반상병 비율이 높아 저염식, 금연 등 올바른 생활습관 관리를 위한 체계적 보건교육과 홍보 프로그램을 개발할 필요성이 요구된다.