• 한국도로학회논문집
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• 제16권5호
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• pp.143-154
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• 2014

PURPOSES : This study drew factors affecting motorcycle accidents in Seoul by severity using an ordered probit model and aimed to analyze and verify the drawn influence factors. METHODS : As the severity of the accidents could be classified into three types (fatal injury, serious injury and minor injury), this study drew the factors affecting accidents by a comparative analysis employing an ordered probit model, removed the variables that would not secure significance sequentially to construct a model with high explanatory power regarding the factors affecting the severity of motorcycle accidents, and calculated the marginal effect of each factor to understand the degree of each factor's impact on the severity. First, Model 1 put in all variables; Model 2 was constructed by removing the variables of the road surface conditions that could not meet the level of significance (p=0.608); Model 3 was constructed by removing gender variable (p=0.423); and Model 4 was constructed finally by removing age variable (p=0.320). RESULTS : As a result of an analysis, statistically significant variables were time of occurrence, type of accident, road alignment and motorcycle displacement, and it turned out that the impacts on the severity were in the following order: a road alignment of left downhill, the type of motorcycle-to-vehicle accidents and a road alignment of a flatland on the left. The significance of the models was tested using the likelihood ratio, the level of significance and suitability statistics about them, and as a result of the test, the significance level and suitability of the constructed models were all excellent. In addition, the model accuracy indicating the accuracy of a predicted value compared to that of the value actually observed was 70.3% for minor injury; 70.1% for serious injury; and 68.6% for fatal injury, and the overall accuracy was 70.2%, which was very high. CONCLUSIONS : As a result of an analysis of motorcycle accidents in Seoul through the ordered probit model and the marginal effect, it turned out that their severity increased in nighttime accidents as compared to daytime ones and gradually increased in the order of motorcycle-to-vehicle accidents, motorcycle-to-person ones and the ones involving motorcycle only. As a result of an analysis, the severity of accidents in road alignments of left downhill, left flatland and straight downhill increased as compared to those in a road alignment of straight flatland and that the severity of accidents of motorcycles with a displacement larger than 50cc was higher than that of those with a displacement smaller than 50cc.

• 대한기계학회논문집B
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• 제38권2호
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• pp.129-137
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• 2014

본 연구에서는 바이오디젤연료 혼합비변화에 대한 디젤엔진의 배기특성에 대해 조사하였다. 실험에 사용된 연료는 경유와 바이오디젤(폐식용유) 혼합연료 BD3, BD5, BD20, BD50 및 BD100을 사용하였으며, 실험변수로서 분사압력(${\Delta}p_{inj}$)을 400bar, 600bar, 800bar, 1000bar 및 1200bar로 설정하였다. 분사압력과 바이오디젤 혼합연료 혼합비에 따른 정량적인 NOx와 Soot의 배기특성 해석을 위하여 통계학에 기초한 피어슨 상관계수와 스피어만 상관계수의 개념을 도입하였다. 본 연구의 결과로서 실험 조건 전체에 대한 피어슨 상관계수는 -0.732, 스피어만 상관계수는 -0.724로 NOx와 Soot 발생의 상관관계가 선형적이다. 특히 분사압력 800bar 조건에서 피어슨 상관계수가 -0.089으로 NOx와 Soot 배출량 상관관계가 0에 가깝기 때문에, 바이오디젤 연료 혼합비 제어를 통한 NOx와 Soot의 동시저감이 가능하다고 판단된다.

• 농약과학회지
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• 제5권4호
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• pp.40-44
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• 2001

농약사용과 관련하여 환경영향 감소를 위한 농약사용 지표 개발에 활용하고자 사과, 배 등 6종 과수를 대상으로 재배면적별 22지역 70농가를 선정하여 국내 과수재배 환경 중 농약의 사용량을 조사 분석하였다. 과수재배시 용도별 농약 사용경향은 살균제>살충제>제초제 순이었으며 사과의 경우 전체 사용량 중 살균제가 72%로서 해충방제가 우선인 벼재배와는 달리 병해방제 위주의 농약사용을 나타냈다. 살균제 중주요 사용농약은 Mancozeb, Propineb, Thiophanate-methyl이었으며 살충제의 경우 Propagite, Omethoate가 우선적으로 사용되었다. 제형별 농약사용량은 수화제 농약 위주의 사용경향을 나타냈으며 WP>EC>SL>SC>SP>WG 순이었다. 과수별 단위면적당(a.i./ha) 농약사용량은 감귤 48.6 kg, 사과 27.1 kg, 배 18.6 kg, 감 17.5 kg, 복숭아 11.3 kg, 포도 9.2 kg으로서, 이를 미국의 농약사용량과 비교한 결과 사과는 한국의 사용량이 더 많은 살포용량 경향을 나타냈으나 감귤, 배, 복숭아의 경우 미국의 농약사용량이 더 많았다. 농약 사용량의 조사분석은 농약위해성 경감을 위한 단위면적당 농약 사용량을 감소시키는 것이 그 목적이므로, 향후 전반적인 농업환경을 반영시킨 전체 작물별 농약 사용량 조사와 함께 작물별 농약 사용량을 경감시킬 수 있는 요인분석이 요망된다.

• 한국산학기술학회논문지
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• 제18권6호
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• pp.68-77
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• 2017

본 연구의 목적은 간호대학생의 전공만족도, 간호전문직관, 대학생활적응의 관계를 확인하고, 전공만족도와 대학생활적응의 관계에서 간호전문직관의 역할을 파악하여 대학생활적응을 돕는 기초자료를 제공하고자 시행하였다. 연구대상자는 K시와 P시에 소재하는 4년제 대학 2개교에서 간호대학생 553명을 대상으로 자기기입식 설문조사를 시행하였다. 자료수집 기간은 2016년 11월 07일부터 11월 25일까지였다. 설문에 응답한 데이터는 SPSS 20.0 프로그램을 이용하여 빈도분석, 기술통계(평균, 표준편차), t-test, ANOVA, Scheffe test, Pearson correlation coefficient, hierarchical regression analysis으로 분석하였다. 연구결과, 간호대학생의 전공만족도는 5점 만점에 3.86점, 간호전문직관은 5점 만점에 3.97점, 대학생활적응은 5점 만점에 3.34점이었으며, 간호대학생의 전공만족도와 간호전문직관(r=.640, p<.001), 전공만족도와 대학생활적응(r=.510, p<.001), 간호전문직관과 대학생활적응(r=.448, p<.001)은 각각에서 유의한 정(+)의 상관관계가 있었다. 그리고 간호대학생의 전공만족도와 대학생활적응과의 관계에서 간호전문직관이 유의한 조절효과(F=8.460, p=.004)와 부분매개효과(${\beta}=.21$, p<.001)를 가지는 것으로 확인되었다. 결론적으로 간호대학생의 전공만족도가 대학생활적응에 미치는 영향에서 간호전문직관이 매우 중요한 요인임을 보여준다. 따라서 간호대학생의 대학생활적응을 높이기 위해서는 전공만족도를 높이고, 나아가 올바른 간호전문직관을 확립할 수 있는 교육프로그램의 개발 및 적용이 필요하다.

• 한국의료질향상학회지
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• 제5권2호
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• pp.224-237
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• 1998

Background : This is an investigative study to analyse the importance of works perceived by Quality Improvement(QI) Coordinators and to evaluate their current work performances using the questionnaires developed by the investigator. Methods : The data were collected from 37 subjects over two weeks period from Oct. 1 to Oct. 17, 1998 and analysed by the descriptive statistics of SPSS program. The items of questionnaire are consisted of 13 work domains including 73 activities based on Quality Management(QM) Coordinator's job description of National Association for Healthcare Quality:data collection & analysis, communication, monitoring, evaluation, accreditation, tool development, policy development, program development, self development, education & trainning, system design, planning, and consultation & support. Results : 1) Of the performances in 13 work domains, the frequencies of the work performed were accreditation(89%), planning(88%), communication(83%), data collection & analysis(82%), monitoring(76%), policy development(72%), consultation & support (71%), education & trainning(70%), self development(68%), evaluation(63%), tool development(61%), program development(44%) and system design(43%) in order. 2) For the importances (1=not important, 5=very important), the policy development(4.46) scored highest then monitoring(4.42), planning(4.41), education & trainning(4.38), communication(4.35), evaluation(4.34) tool development (4.30), data collection & analysis(4.29), program development(4.22), consultation & support(4.22), accreditation(4.15), self development(4.05) and system design(3.98) in order. 3) There was a difference between the work performance and the perceived importance. The results showed the low performances in policy development, monitoring, education & trainning and evaluation which ranked high by the perceived importance and the high performances in accreditation, data collection & analysis, self development, communication and consultation & support which ranked middle to low by the perceived importance. 4) The reasons for low performances of QI Coordinators were the lack of clear assignment for the responsibility and allowed authority for work to QI Coordinators(30.8%), insufficient member of QI Coordinators(13.9%), lack of hospital director's interest(11.5%), low motivation of QI Coordinators (10.6%) and insufficient knowledge & experience of QI Coordinators (8.8%). Conclusion : Most works were perceived important by QI Coordinators, but there was a difference in the work performance. The works performed over 70% were related with accreditation, data collection & analysis, communication, planning and monitoring, on the other hand under 50% in performances were related with system design, program development, tool development and evaluation.

• 대한물리치료과학회지
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• 제9권3호
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• pp.19-29
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• 2002

This study questionnaires 166 inpatients and outpatients with stroke in 8 hospitals, including Wonkwang University Gwangju Korean Hospital from July 2 to 31, 2001 in order to find out the influence of general nature, smoking, drinking, obesity, and perception of saltness of patients with stork on the outbreak of stroke and to examine important factors by dividing into hemorrhagic and ischemic stroke. Finally, collected data is analyzed statistically, using SPSS 7.5 statistics package. This study reaches a conclusion as follows. 1. For general nature, 86(51.8%) patients have hemorrhagic stroke and 80(48.2%), ischemic stroke in the rate of 1.59:1(male:female), suggesting that male's outbreak is more than female's. Outbreak age is ranged from 20 years to 90 years in order of 60's, 50's, and 40's. 50's-60's accounts for more than half percentage. 2. For smoking, 73(71.6%) of male patients has smoking experience and their 562% has ischemic stroke. Their cross-analysis for hemorrhagic and ischemic stroke shows significant difference with $x^2=3.90$(p<0.05). 48.6% of patients with smoking experience is ranged from 1 to 10 a day in smoking quantity. 3. For drinking, 90(88.2%) of male patients has drinking experience and their 53.3% has hemorrhagicstroke. Their cross-analysis for hemorrhagic and ischemic stroke shows no significant difference with x2=3.40(p<0.1). 59.3% of patients with drinking experience is classified as a overdrinking group. 4. For obesity, low weight is 8(4.8%): normal, 111(66.9%): excessive, 40(24.1%), and obesity, 7(4.2%). In patients with hemorrhagic stroke, excessive weight and obesity are somewhat high(33.7%). The cross-analysis for male's hemorrhagic and ischemic stork by dividing BMI into more and less than 25 shows no significant difference with x=3.52(p<0.1). 5. For perception of saltness, 21(12.7%) patients eat flat: 76(45.8%) normally, and 69(41.5%), saltily. Many patients with ischemic stroke are classified as a group who eat saltily. The cross-analysis for male's hemorrhagic and ischemic stroke shows signifiant difference with x2=10.99(p<0.05). As this study has small sample and selects inpatient and outpatient in certain local hospital, it is difficult to generalize. But the cross-analysis of male's hemorrhagic and ischemic stroke shows signifiant difference in smoking and perception of saltness. Drinking and obesity are more important factors in hemorrhagic stroke and smoking and perception of saltness in ischemic stroke.

• 한국산학기술학회논문지
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• 제10권5호
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• pp.1009-1019
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• 2009

본 연구에서는 우리나라 수위관측소들 중에서 관측 유량이 검증된 총 19개 유역을 선정하고 관측된 홍수량을 사용하여 적정 설계홍수량을 유도함으로써 우리나라의 설계홍수량 특성을 분석하였다. 대상유역별로 관측개시 년도에서부터 분석 시작년을 기준으로 1년씩 증가 시키는 점진적 구성 방식으로 연최대홍수량에 대한 빈도분석을 실시하기 위해, 변동특성을 이동평균법에 의해 분석하였다. 19개 대상유역에 대한 연최대홍수량 계열 구성기간별로 기본통치를 산정하고 독립성, 동질성 및 Outiler 검정을 실시하였다. Gumbel, Generalized Extreme Value, Generalized Logistic 및 Generalized Pareto 분포의 적합도 검정을 LH-모멘트비도와 Kolmogorov-Smirnov 검정에 의해 수행하였다. 적정 확률분포로 선정된 GEV 분포의 매개변수를 확률가중모멘트의 치수 변화에 의한 L, L1, L2, L3 및 L4-모멘트법에 의해 추정하고 대상유역 및 연최대홍수량 계열 구성 기간별 설계홍수량을 유도하였다. 본 연구에서 사용한 변동률 분석에 따라 최근 지구온난화에 따른 우리나라 기후 변화를 고려한 적절한 수리구조물의 설계 조건변경시기는 2002년 전후로 하여야 할 것이다.

• 한국산학기술학회논문지
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• 제10권5호
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• pp.1115-1125
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• 2009

본 연구는 초등학생의 안전실천수준과 안전실천 관련요인을 파악하여 초등학생의 안전사고 예방을 위한 프로그램개발에 기초 자료를 제공하기 위하여 시도되었다. 대상자는 549명으로 자가설문지를 이용하였다. 자료분석은 기술적 통계, t-test, ANOVA, Scheffe's test, Pearson correlation coefficient, Stepwise multiple regression을 SPSS 12.0을 이용하여 분석하였다. 안전의식 수준은 3.55점과 안전실천 수준은 2.98점이었으며. 안전실천 수준은 초등학생의 성별, 학년, 친구수, 학교생활적응정도, 학업수준, 성격, 호기심, 안전교육필요성 인식정도, 부모의 안전교육실시 정도, 학교안전교육실시 정도에 통계적으로 유의한 차이가 있었다. 안전실천정도에 영향을 미치는 변수로는 안전의식 수준이 가장 높은 설명력을 나타냈으며, 자아존중감, 부모의 안전교육실시정도가 안전실천 수준을 설명하는 유의한 변수로 모두 28.8%의 설명력을 나타내었다. 안전실천수준에 영향을 미치는 다른 변인을 앞으로 더 규명해야 할 필요가 있다.

• 한국산학기술학회논문지
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• 제21권8호
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• pp.241-247
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• 2020

본 연구는 간호대학생의 다문화 인식과 문화적 공감이 문화적 역량에 미치는 영향을 확인하여 문화적 역량을 향상시키기 위한 기초자료를 제공하기 위하여 시도된 서술적 조사연구이다. 연구대상자는 광주와 전남 지역에 소재한 2개의 간호대학에 재학 중인 1학년에서 4학년까지의 학생을 대상으로 하였다. 자료는 2018년 9월부터 12월까지 수집하였으며, 분석을 위해 총 201명의 자료를 사용하였다. 자료 분석을 위해 SPSS 25.0 program을 이용하여 기술적 통계, t-test, ANOVA, Pearson 상관계수, 다중회귀분석을 실시하였다. 본 연구의 결과는 다음과 같다. 간호대학생의 다문화 인식((r=.451, p<.01)과 문화적 공감(r=.582, p<.01)은 문화적 역량에 유의하게 높은 양의 상관관계를 갖는 것으로 나타났다. 또한 간호대학생의 문화적 역량에 영향을 미치는 요인은 문화적 공감(β=.422, p<.001), 다문화 인식(β=.222, p<.001) 순으로 긍정적인 영향을 미치는 것으로 나타났으며, 이들 요인의 설명력은 40.5%로 확인되었다. 이러한 연구 결과는 간호대학생의 문화적 역량을 증진시키기 위해서는 다문화 인식과 문화적 공감을 높이기 위한 다양한 방안들이 적극적으로 개발되어야 하며, 이러한 방안을 개발할 때 다문화 인식보다는 문화적 공감에 더 중점을 두어야 함을 시사한다.

• 산경연구논집
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• 제9권12호
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• pp.31-43
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• 2018

Purpose - Smartphone shopping malls provide customers with a variety of tangible and intangible services including web sites, web design, use convenience, information for products and shopping and various after services. Accordingly, it is needed to expand and classify service qualities based on the various services provided by smartphone shopping malls, and then analyze path structures of smartphone shopping malls' qualities → customer satisfaction → behavioral intention. The purpose of this study is to categorize the qualities of smartphone shopping mall users based on the e-SERVQUAL by Lee(2002) and the SERVQUAL by Parasuraman et al.(1988, 2005), the smartphone shopping malls' service qualities based on service quality of smartphone shopping malls used in the previous use studies, and the Website quality factors of service industry and to analyze path structure of smartphone shopping mall's qualities → customer satisfaction → behavioral intention on college students in order to confirm the system of smartphone shopping malls' qualities. Research design, data, and methodology - This study's survey was carried out on the college students of university located in northeastern of Seoul. It was from December 7 - 15, 2017, and a total of 240 questionnaires were distributed, with 228 collected. Of them, effective questionnaires used in the final study were a total of 201 except 27 that couldn't be used. In this study, empirical analysis was done with factor analysis, correlation analysis, multiple regression analysis, simple multiple regression analysis and moderating regression analysis by using Statistics Package SPSS18.0. Results - The study results are as follows: First, smartphone shopping malls' qualities were classified into six categories like customer system quality, Web design quality, convenience quality, information-offering quality, service quality, and product quality. Second, it showed that system quality, Web design quality, and information-offering quality had a positive impact on customer satisfaction, respectively. Third, it suggested that quality factors of smartphone shopping mall users had a positive impact on customer satisfaction in the order of quality, information-offering quality, system quality and Web design quality. Finally, it showed that customer service quality, product quality, and convenience quality did not have a positive impact on customer satisfaction. In addition, it said that customer satisfaction of smartphone shopping mall users had a positive impact on behavioral intention and thereby, the higher the customer satisfaction was, the higher the relations between reuse intention and recommendation intention were. Meanwhile, moderating regression analysis showed that trust did not have moderating effect in the relations between customer satisfaction and behavioral intention. The above study revealed that smartphone shopping malls' qualities were classified into six categories and it was possible to generalize after empirical analysis was made in the path structure. Conclusions - Smartphone shopping mall users consider usefulness of obtaining shopping information and quality on quick and abundant shopping information more important than access environment of smartphone shopping malls and kind services of smartphone shopping mall managers. Thereby, smartphone shopping mall marketers need to take service qualities like system quality and information-offering quality into more consideration.