• 한국가스학회지
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• 제24권4호
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• pp.84-92
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• 2020

대부분의 화학공장 내 설비는 유해물질을 취급하거나, 일상적으로 접할 수 있는 온도 및 압력의 범위를 벗어난 환경에서 가동되며 이러한 응력 및 환경조건으로 인하여 노후화에 취약하다. 이러한 조건에 노출된 설비는 지속적인 손상이 누적되어 고장이 발생할 가능성이 높아짐은 물론, 정비 및 교체를 하지 않는다면 사고로 이어진다. 전세계적으로 위험성기반검사(Risk Based Inspection)라는 권고지침이 통용되고 있다. 하지만 RBI는 이미 일정시간 경과한 설비에 대해서는 한계가 존재한다. 적절한 점검을 수행하는 우리나라 울산 산업단지의 노후화 실태 조사 결과, 많은 수의 설비들이 사용기간이 20년을 경과하였다. 또한, 사고가 일어난 설비 대부분이 20년 이상 운영해 왔다. 따라서 본 연구에서는 일정 사용기간이 초과된 장치를 노후설비로 분류하는 기준을 제시하였다. 또한, 이에 대하여 정량적 위험성평가를 진행하였다. 이로 인해 도출된 해당 노후설비의 위험성을 Economic index로 표현하여 손실비용을 산정하고 Risk를 감소하기 위하여 비용편익 분석 방법을 활용한 안전투자 방법을 제안하였다. 본 연구에서 제시한 정량적 위험성 평가를 이용한 노후설비의 비용편익 분석 방법을 활용하여 노후 설비의 성능 향상 및 수명 연장, 생산 효율성 및 설비 계통 신뢰도 향상, 안전관리 비용 인식 변화, 그리고 직원의 안정감 증대, 손실비용의 감소를 기대할 수 있다.

• 대한지리학회지
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• 제41권3호
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• pp.331-345
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• 2006

본 연구는 두만강 하류 지역에 대규모로 발달한 사구 지형의 분포 및 지표 환경, 퇴적물의 특성, 기원 및 형성과정을 밝히고, 두만강 하류 일대의 하천 및 해안 환경변화를 고찰하고자 한다. 이를 위해, Landsat, Spot 영상을 이용하여 지표피복을 분석하고, 2회의 현지 야외조사를 실시하였으며, 입도분석 및 현미경 관찰을 통해 사구 퇴적물 시료를 분석하였다. 위성영상에서 파악된 사질퇴적지형 요소들은 삼각주, 사취, 이동사구, 정착사구, 사주, 사주피복 수변식생으로 구분되었다. 사구 퇴적물에 대한 입도 분석 결과, 조사 지역 중 가장 상류 쪽에 해당하는 DM3과 DM4에서 하성보다는 해성 모래와의 상관성이 높게 나타났다. 이는 현재 사구를 이루는 모래의 입도 특성이 두만강 하류 지역의 현재 자연환경을 반영하고 있지 않음을 의미하는 것이다. 현미경 분석 결과, 모든 시료에서 풍화에 가장 강한 석영의 비율이 $65{\sim}83%$로 가장 높았다. 그러나 $30{\sim}40%$를 차지하는 광물 입자의 표면은 화학적 풍화를 받아 황색의 물질로 표면이 코팅되어 있으며, 물리 화학적 풍화에 의한 바늘 및 그물 모양의 거친 표면 형태와 에칭 피트가 나타난다.

• 대한방사선기술학회지:방사선기술과학
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• 제35권1호
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• pp.35-44
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• 2012

서울소재 'S'병원에서 근무중인 방사선사를 대상으로 병원 근무경력 및 CT검사실 근무 경험 유 무, 현재 사용하고 있는 방사선 선원의 종류에 따른 CT검사와 일반촬영검사의 방사선 선량과 위험성에 관한 인식도 조사를 통해 CT검사의 위험성에 대한 각성을 위한 기초자료로 활용하고자 한다. 영상의학과에 근무하는 방사선사 중 131명을 대상으로 설문지를 통해 연구가설 검정을 위한 자료를 수집하였고, 설문문항의 Cronbach @계수는0.825988과0.767161로 나타났으며, p-value의 기각률은<0.05로 하였다. 연구가설검정을 위해 SAS 9.1(SAS Institute Inc., Cary, NC, USA.)통계패키지를 이용하여 Mann-Whitney test와 Kruskai-Wallis test, Two sample T-test, Two sample T-test with Bonferroni's Correction, One-way ANOVA 통계분석방법 등을 이용하였다. CT검사와 일반촬영의 선량에 관한 가설의 각 p-value 값은 0.2291~0.9663의 범위로 나타났고, CT검사와 일반촬영검사의 위험성에 관한 가설의 각 p-value 값은 0.1924~1.0000의 범위로 나타났다. 모든 연구가설의 p-value값이 기각률(<0.05)을 상위하여 나타났으며, 현재 'S'병원에 근무중인 방사선사들은 근무경력 및 CT검사실 근무경력 유무, 현재 사용하는 방사선 선원의 종류에 관계없이 일반촬영 보다 CT검사가 선량이 많으며, 위험하다고 인식하고 있는 것으로 나타났다.

• 한국의료질향상학회지
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• 제10권2호
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• pp.190-203
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• 2003

Background: Dental hygienists are at risk of acquiring infections through exposure to infectious agents. This study explores the frequency of exposure to infectious agents and infection control practices among dental hygienists. Methods: We undertook a cross-sectional survey to examine the exposure to infectious agents and infection control practices among dental hygienists through questionnaire. Data were obtained from 124 dental hygienists attending educational conferences. A multiple logistic regression analysis was conducted to determine the factors that effect infection control practices in relation to age, completion of infection control education, recognition of their own serum hepatitis Ag/Ab status, the number of one day patients, location of clinics, type of clinics, and career years. Result: Of the 124 dental hygienists, 91.7% were exposed to at least one accident such as needle stick injuries during their practices periods. The health screening coverage rate in dental hygienists was 16.5%. The number of one day patients and career years were important in relation to infection control practices among dental hygienists. The adjusted odds ratio estimates for career years were 5.049 times greater(95% Cl 1.238-20.597) for groups with over 4 career years than under 2 career years. That for the number of one day patients were 0.261(95% Cl 0.071-0.955) lower for through 20 up to 30 patients, 0.531(95% Cl 0.102-2.78) lower for through 30 up to 40 patients and 0.498(95% Cl 0.123-2.017) lower for more than 40 patients than under 20 patients. Conclusion: From these results, prevalence of infection control practices among dental hygienists is related to the number of one day patients and career years. Prevention of cross infection and reduction of future transmission should be a priority to dental hygienists for promotion of infection control and further efforts to educate newcomers on infection prevention should be made.

• 한국보건간호학회지
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• 제12권2호
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• pp.122-135
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• 1998

This study was carried out to understand the nursing needs of postpartum women during the postpartum period. The goal of study was to obtain data needed to develop maternal education programs and to improve the nursing quality for postpartum women. A cross-sectional survey design was employed in this study. The subjects were 101 postpartum women who had delivery at 2 general hospitals in Chung-Buk. Korea. Data were collected from Sep. 29 to Nov. 28. 1997 by means of a structured questionnaire. The instrument used for this study was the one which was consisted of revised Maternal Concerns Questionnaire (MCQ) developed by Bull (1979). The data were analyzed through the SPSS/PC+ program by use of frequency, t-test and ANOVA. The results of the study were as follows; 1) The mean score of concerns about 'self' was 2.98 for primipara and 2.80 for multipara but was not statistically significant difference. Among the items of concerns 'for self', 'Being good mothers' was the highest (primipara 3.93. multipara 3.75). 2) The mean score of concerns about 'baby' was 3.64 for primipara and 3.53 for multipara but was not statistically significant difference. Among the items of concerns 'for baby', 'Normal growth and development' was the highest (primipara 3.91. multipara 3.90). 3) The mean score of concerns about 'husband' was 3.33 for primipara and 3.06 for multipara and was statistically significant difference (t=2.11. p=0.03). Among the items of concerns 'for husband', 'Husband being a good father' was the highest (primipara 3.87, multipara 3.77). 4) The mean score of concerns about 'family' was 2.65 for primipara and 2.80 for multipara but was not statistically significant. Among the items of concerns 'for family', 'Change in the family's lifestyle' was the highest(primipara 3.01, multipara 2.93, t=-1.99, p=0.04). 5) The mean score of concerns about 'community' was 2.48 for primipara and 2.42 for multipara but was not statistically significant. Among the items of concerns 'for community'. 'Getting to health care facilities' was the highest (primipara 2.48, multipara 2.42). 6) On considering the relationship between the postpartum women's nursing needs and their general characteristics, 'regularly antenatal care' was statistically significant (t=2.29. p=0.02). In conclusion, recognition of maternal concerns can be used by nurses to identify nursing diagnoses and to develop care plans that reflect the patient's priorities.

• 한국학교수학회논문집
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• 제5권2호
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• pp.1-15
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• 2002

The purpose of this study came to start to be helpful in that the teachers in field produced evaluation subject about the mathematics and applied by analyzing the performance capacity for the students about the subject developed through the application of subject about the teaching-learning model that can utilize the learners' learning experience and the development of items that can evaluate it by utilizing various and concrete operational materials as an object of the first year at the middle schools. The concrete purpose of realizing it is as follows. 1. This study is to develop the teaching-learning model centered on activities adequate to utilize various and concrete operational materials. 2. This study is to develop evaluation data for utilizing the concrete operational materials by making construction through the application of developed teaching-learning model as possible. 3. This study is to present standards initiative for reliable and fair marking about the evaluation data and to analyze the students' practice capacity by using it effectively. For accomplishing the purpose of this research, this study is the work-oriented teaching and learning model using learning data that can be easily found around the surroundings and 8 evaluation programs in order that the experience-oriented learning based on circumstances learning among the learning models of constructivism. Also, it is to examine the result after applying that on a basis of 25 students, consisted of only on class in a year, in the first year at the small size of agricultural middle schools. The result of this study from this research is as follows. First, as a result of frequency survey, of response about the developed evaluation data it showed positive response more than 80% of all the items. The atmosphere of self-directed learning was produced because the developed evaluation data could induce activity-based learning naturally by stimulating the students' curiosity and promoting interest. Second, this study executed t-test for the result of questionnaire about the mathematics propensity, and there were significant differences in 19 items among 25 items. It presented that the application of data about the teaching-learning and evaluation directly using concrete operational materials to the constructional learning by level might have desirable affect on the students' mathematical propensity. It came to be a motive that could increase value recognition and interest on the subject of mathematics by investigating a mathematical principle rule and confirming it through activity learning using the concrete operational materials.

• 한국산업보건학회지
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• 제9권1호
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• pp.41-55
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• 1999

In order to evaluate the effects of knowledge, attitude and practice on noise-induced hearing loss or hearing threshold level, questionnaire survey was performed and hearing thresholds of 1 kHz and 4 kHz were measured on 1,040 subjects with workers exposed to noise, safety and health officers. industrial hygienists, analysts rind office workers. The results were as follows ; 1. The following 6 factors were obtained by factor analysis and factor rotation of 30 questionnaire of knowledge, attitude and practice about noise; knowledge of noise (F1), concern of hearing protective devices (F2), concern of noise induced hearing loss (F3), concern of noise level and hearing impairment (F4), concern of noise in workplace (F5) and recognition of noised-induced hearing loss (F6). 56.1% of variance was explained by 6 factors. 2. Significant variables influencing knowledge, attitude and practice about noise were education level and age in F1, personal protective devices (PPE) and education level in F2, age and education level in F3, education level, age and sex in F4, PPE, education level, age and work duration in F5, and work duration and PPE in F6. 3. Hearing thresholds of 4 kHz were significantly higher in workers exposed to noise than that of in the other subjects and tended to be higher in industrial hygienists, safety and health officers and analysts than that of the office workers. 4. Significant variables influencing hearing thresholds of 1 kHz were age, education level, F5 and F6 in workers exposed to noise, and F1 in industrial hygienists. 5. Significant variables influencing hearing thresholds of 4 kHz were age, F6, sex, work duration, F1, F5, F2 and F3 in workers exposed to noise, F1 and age in safety and health officers, and F6, sex and F4 in industrial hygienists. With the above results, it suggested that workers exposed to noise be needed the education of knowledge, attitude and practice about noise in hearing conservation program for the prevention of noise induced hearing loss. Also, it suggested that health managers in workplace be needed countermeasures to prevent hearing loss although they are intermittently exposed to noise.

• 한국방사선학회논문지
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• 제1권1호
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• pp.5-10
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• 2007

본 연구는 충남 S시 방사선학과, 식품생물학과 1, 2, 3학년에 재학 중인 208명(남자 93명, 여자 115명)을 대상으로 방사선 식품조사에 대한 인지도 및 수용도를 설문지 이용하여 분석한 결과는 다음과 같다. 1. 방사선 식품조사에 대해 알고 있다고 답변한 대상자는 전체 208명 중 81명(38.9%)으로 나타났으며, 학과, 학년별 분포에서는 방사선학과의 3학년 32명(15.4%)이 가장 많이 알고 있었고, 식품생물공학과 학생들은 대부분 모르는 것으로 나타났다. 2. 방사선 조사식품에 대해 가장 신뢰하는 기관이나 단체에서 식품의 안정성을 과학적으로 입증한다면 이를 "전적으로 구입하겠다"고 답변한 대상자는 전체 208명 중 방사선학과 50명(24%), 식품생물공학과 12명(5.77%) 총 62명(29.8%)으로 나타났으며, 132명(63.5%)은 "모르겠다"라고 답하였는데 이는 방사선 조사식품에 대해 정확한 정보부족으로 인식하지 못하는 것으로 사료된다. 방사선 조사식품의 수용도와 성별과 학년별간의 유의성은 없는 것으로 나타났다. 3. 최근 정부에서는 학교급식 식중독사고에 대처하기 위하여 급식식품에 방사선 조사를 하겠다고 하는 방침에 학생들의 생각을 분석한 것으로 학교급식의 식중독 사고 방지를 위하여 급식식품에 방사선을 조사한다는 정부 방침에 총 204명 중 "매우 필요하다"고 답한 응답자는 18명(8.8%), "대체로 필요하다"는 87명(42.6%)으로 총 105명(51.5%)이 긍정적으로 생각하고 있는 것으로 나타났으며, "모르겠다"고 답한 응답자는 87명(42.6%), "필요하지 않다"는 12명(5.9%)으로 총 99명(48.5%)이 부정적으로 생각하는 것으로 나타났고, 방사선 조사 식품의 필요성과 정부의 대처방안에 대한 일원 다변량 분산분석 결과 유의성이 있는 것으로 나타났다.

• 가정간호학회지
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• 제13권1호
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• pp.24-32
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• 2006

The purpose of this study is to predict the degree of taking the complementary & alternative therapy in the home care nursing service and provide basic data for the application of it. To accomplish this, degree of general recognition of the complementary & alternative therapy, experiences, degree of concern, applicability of the therapy, and educational need should be studied. This study is a descriptive research survey on the home care nurses working at 73 medical centers out of 125 nationwide who provide hospital based home nursing care. The data was collected from Sep. 20, to Oct. 20, 2004 by ChoiHeyran's questionaries (2002). The data was analyzed by the frequency and the percentage. The results of this study are as follows ; 1. The degree of pre-cognition on the complementary & alternative therapy is very high. Information about the therapy was mostly obtained through medias. Home care nurses understand that he desirable treatment is to practice medical treatment and complementary & alternative therapy simultaneously. While 50% of them have already practiced complementary & alternative therapy among their patients. The most commonly used therapy is Acupressure. And Home care nurses have open and positive attitudes about the complementary & alternative therapy as to answer they aye ready to recommend it to their patients. 2. Over half of the Home care nurses met patients taking complementary & alternative therapy. 94.5% of them think scientific diagnosis on the effect of the therapy. advice from the doctor. and the special working staff is required to apply it on to the home care nursing. 3. 68.5% of the Home care nurses have taken education on the therapy through general comprehensive instructions and supplementary. Most of them want to have a opportunity education on the therapy because they want to provide comprehensive nursing and diversified nursing service. The preferred educations are Hand acupuncture, Acupressure & Massage and Aromatherapy, in that order. Based on the above results, the followings are recommended. 1. A study that stipulates the types, applications, and efficiency assessment of the complementary & alternative therapy practiced by Home care nurses in the home care nursing care procedure. And systematic and scientific nursing intervention be developed.

• 한국지구과학회지
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• 제27권3호
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• pp.279-288
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• 2006

본 연구는 김제시 1개 중학교 2학년 여학생 5개 반을 대상으로, 중학교 과학 '지각 변동' 단원을 중심으로 협동학습을 실시하여 협동 학습이 여학생들의 과학 선호도에 효과가 있는지 조사하였다. 협동 학습 모둠은 학습 능력이 이질적으로 되도록 4명을 한 모둠으로 구성하여 약 10주간의 협동 학습을 실시하였다. 협동 학습 실시 전 후 동일한 검사지로 과학 선호도에 대한 사전 검사와 사후 검사를 실시하였다. 협동 학습 실시 후 여중생들의 과학 선호도에 긍정적인 효과가 나타났다. 과학 수업에 대한 인식과 과학 수업에 대한 참여도가 협동 학습 전과 달리 긍정적인 변화를 보였다. 그러나 과학자들에 대한 인식이나 과학적으로 사고하거나 행동하는 습관을 나타내는 과학적 태도는 유의미한 차이가 없었다. 이는 10주 동안의 기간은 협동 학습 전략을 효과적으로 시행하는데 충분하지 못한 것으로 생각된다. 협동학습에 대한 학생들의 의견 조사에서 중위 수준 학생들은 상-하위 수준 학생들과 달리 협동 학습에 대해 강한 긍정을 나타냈다. 협동 학습을 통해 상위 수준 학생들에게 배우고, 하위 수준 학생들에게 나누는 모둠 활동에서 자신감을 얻고 흥미를 느낀 것으로 보인다. 다른 의견으로는 협동 학습이 과학 수업에 대한 흥미 유발과 공부에 더 도움이 되고, 학생의 참여도를 높이며, 학생들에게 협동심을 길러주는 등의 좋은 점이 있으나, 학생의 언어적 상호작용으로 인한 소란스러움을 유발시키고, 모둠 내 협동하는데 의견 충돌이 있는 단점이 있었다.