• 환경생물
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• 제27권2호
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• pp.183-190
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• 2009

식생요인, 토양환경요인이 수질에 미치는 영향을 연구하고자 1993~1997년의 자료를 토대로 2003~2007년에 걸쳐 조사를 실시하였다. 조사유역을 11개 소집수역으로 세분하고 하천 유역의 오염원 동태, 식생요인과 하천수질, 토양요인과 하천수질의 상관성을 생태학적 관점에서 규명하고자 조사를 실시하였다. 식생형은 총 10개 type으로 구분되었으며 식생형별 수질과의 상관은 특히, 굴참나무군락에서 용존산소(DO)와 5% 수준(r=0.98)에서, 일본잎갈나무식재림과 T-P는 1% 수준(r=1)에서 유의한 상관을 나타내고 있었다. 또한, 삼림면적과 총인($Y_{T-P}$=-0.0017X+0.2215, r=0.16), COD는 $Y_{COD}$=-0.0395X+8.5051 (r=0.47)는 역의 상관을 BOD는 $Y_{BOD}$=0.0098X+3.0381 (r=0.19)로 거의 상관이 없는 것으로 나타났다. 조사지역의 토양형은 서쪽의 토양은 단순하지만 동쪽은 암쇄토를 비롯하여 적황색토, 퇴적토 등 매우 복잡한 양상을 띠고 있다. pH는 5.4~6.0의 범위로 나타났는데 전국 토양 pH의 평균치인 5.4~6.9와 거의 비슷하였다. 그러나 TS는 75.8~80.2%, VS는 3.80~5.80%의 범위로 전국의 평균치보다 훨씬 높았다. 표토의 깊이와 유출량과는 $Y_{run-off}$=-1.0088X+35.378 (r=0.68)로 부(-)의 상관이 있는데 상류지역에서는 상관이 낮고, 하류 지역으로 갈수록 높은 상관을 나타내고 있다. 이는 상류지역의 경우 평균경사가 높아 표토의 깊이에 관계없이 유출량이 증가하기 때문으로 상류지역보다는 하류지역의 표토 관리를 철저히 해야 유출량이 일정히 유지될 것으로 보인다. 또한, 토양환경요인과 수질항목 간의 유의성은 토양 pH와 하천수질의 pH 간에 유의한 차이가 있는 것으로 확인되었다.

• 한국응급구조학회지
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• 제13권2호
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• pp.99-108
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• 2009

Purpose : The purpose of this study is to offer basic data in arranging the improved working environment to Emergency Medical Technicians, by analyzing the influence of job satisfaction in Emergency Medical Technician within hospital upon organizational commitment. Method : This study was carried out targeting 203 Emergency Medical Technicians who are working at hospitals in B Metropolitan City, U Metropolitan City, D Metropolitan City, an d G Province. The data collection was performed from April 1, 2009 to June 10. The statistical processing was used a program of SPSS WIN 12.0 Version. The statistical significance was set to p<.05. Results : 1. In the descriptive statistics of the job satisfaction and the organizational commitment. the whole average for job satisfaction was 3.06 points. The whole average for organizational commitment was 3.05 points. 2. In the difference between job satisfaction and organizational commitment, the group for job satisfaction was indicated to be statistically significant in job-choice motive(F=2.710, p<.05) and turnover propensity(t=.662, p<.001). The group for organizational commitment was indicated to be statistically significant in working department(F=2.871, p<.05), job-choice motive(F=2.944, p<.05), turnover propensity(t=.903, p<.001), and turnover reason(F=3.415, p<.01). 3. In the correlation between job satisfaction and organizational commitment, the job satisfaction showed positive correlation(r=.736, p<.01) with organizational commitment. 4. As for the influence of job-satisfaction factor upon organizational commitment, salary(${\beta}$=.162, t=2.739, p<.01), autonomy(${\beta}$=.372, t=4.633, p<.001), working environment(${\beta}$=.139, t=1.968, p<.05), and organizational needs(${\beta}$=.172, t=2.291, p<.05) were indicated to have significant effect on organizational commitment. Conclusion : The institutional arrangement is considered to be likely to be necessarily made highly for improving social image and enhancing salary and working environment so that Emergency Medical Technician within hospital can be enhanced job satisfaction and organizational commitment.

• 한국유기농업학회지
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• 제23권4호
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• pp.897-909
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• 2015

우리나라 포도원에서 고품질 포도생산에 이용되고 있는 잡초관리 방법들이 병발생 및 수체생육과 과실품질에 미치는 영향을 구명하여 포도재배 농가에 실제적인 잡초관리 방법을 제공하고자 연구를 실시하였다. '캠벨얼리' 품종을 재배하는 비가림 포도원에서 잡초관리방법으로 포도가지 파쇄(C.B.), 흑색부직포(W.F.), 흑색차광망(S.N.), 흑색비닐(P.F.), 왕겨(R.H.), 기계제초 2회(M.W.2), 기계제초 3회(M.W.3)를 무처리와 비교하였다. 비가림 포도원의 피복처리구(C.B., W.F., S.N., P.F., R.H.)와 무피복처리구(M.W.2, M.W.3, U.T.)간 평균온도는 각각 $26.2^{\circ}C$와 $25.8^{\circ}C$로 비슷하였으나, 피복처리구의 지상부 습도는 피복처리구에서 7월에 90%로 유지되다가 7월 하순 이후 40% 이하로 급격히 낮아져 무피복처리구와 확연한 차이를 보였다. 토양수분은 무피복처리구에 비해 피복처리구에서 모두 높았으나 지온은 대체적으로 피복처리구가 낮았다. 피복처리별 갈색무늬병 발병은 흑색비닐피복에서 무처리 대비 7월에는 85%, 병발생이 높아지는 8월에는 69%의 감소효과를 보였고, 결과모지에서 병반 발생이 가장 적은 것으로 나타났다. 생육특성 중 절간장, 절간경은 무처리에 비해 흑색비닐 피복에서 생육이 좋았고 SPAD값은 흑색비닐 피복에서 가장 높았다. 과실품질 중 당도는 $14{\sim}15^{\circ}Brix$로 큰 차이는 없었으나 흑색비닐 피복에서 약간 높게 나타났다.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2018년도 추계학술대회
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• pp.109-109
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• 2018

Bacillus subtilis B22, a chemotrophic and aerobic bacterial strain was isolated from homemade kimchi, identified by 16S rRNA gene sequencing. B22 was primarily screened by biochemical, carbon source utilization tests. B22 was used to produce pectinase and ${\beta}$-glucosidase by submerged fermentation under different light sources. B22 was incubated in pectin media and basal media (pH 7.0) under blue, green, red and white light-emitting diodes (LEDs), fluorescent white light, and in darkness at $37^{\circ}C$, orbital shaker 150 rpm for 24 hours. Fermentation under blue LEDs maximized pectinase production ($71.59{\pm}1.6U/mL$ at 24 h) and ${\beta}$-glucosidase production ($56.31{\pm}1.6U/mL$ at 24 h). Further, the production of enzyme increased to pectinase ($156{\pm}1.28U/mL$) and ${\beta}$-glucosidase ($172{\pm}1.28U/mL$) with 3% glucose as a carbon source. Activity and stability of the partially purified enzymes were higher at pH 6.0 to 8.0 and $25-55^{\circ}C$. The effect on the metal ions $Na^+$ and $K^+$ and (moderateactivity) $Mn^{2+}$ and $Ni^{2+}$ increased activity, while $Hg^{2+}$, $Cu^{2+}$, $Fe^{2+}$, and $Fe^{2+}$ inhibited activity. EDTA, phenylmethylsulfonyl fluoride and 5,5-dithiobis (2-nitrobenzoicacid) reduced activity, while tetrafluoroethylene and 1,10-phenanthroline inhibited activity. The amylase was highly tolerant of the surfactants TritonX-100, Tween-20, Tween-80 and compatible with organic solvents methanol, ethanol, isoamylalcohol, isopropanol, t-butylalcohol and the oxidizing agents hydrogen peroxide, sodium perborate and sodium hypochlorite, although potassium iodide and ammonium persulfate reduced activity. These properties suggest utility of pectinase and ${\beta}$-glucosidase produced by B. subtilis B22 under blue LED-mediated fermentation for industrial applications.

• 한국산학기술학회논문지
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• 제22권6호
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• pp.226-236
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• 2021

본 연구는 복지관 이용 노인의 사회적지지가 회피적 대처방식의 매개효과를 통하여 자살생각에 미치는 영향을 파악하기 위한 목적으로 시도되었다. 연구방법은 G시에 소재한 4곳의 노인복지관을 이용하는 노인 392명을 대상으로 한 서술적 조사연구로, 2019년 10월 21일부터 11월 8일까지 자료를 수집하였다. 연구 통계방법은 IBM SPSS/win 26.0 프로그램으로 t-test, ANOVA, Scheff's test, 피어슨 상관관계를 분석하였고, 매개효과는 Baron과 Kenny의 3단계분석 절차에 따른 다중회귀분석으로 분석하였다. 그 결과, 대상자의 사회적지지의 평균점수는 5.73±1.23점으로 높은 것으로 나타났으며, 회피적 대처방식은 12.53±3.47점, 자살생각은 6.21±2.06점으로 회피적 대처방식과 자살생각의 점수 모두 매우 낮은 것으로 나타났다. 각 변수들 간의 상관관계에서 자살생각은 사회적지지(r=-.151, p=.004)와 음의 상관관계 있었으며, 회피적 대처방식과(r=.315, p<.001)는 통계적으로 유의한 양의 상관관계가 있는 것으로 나타났다. 노인복지관 이용 노인의 회피적 대처방식은 사회적지지와 자살생각의 관계를 부분매개하는 것으로 나타났다(Z=-2.97, p<.001). 따라서 지역사회 노인들의 자살생각과 같은 부정적인 정서를 사전에 예방하고 방지하기 위해 지역 및 정부차원의 다양한 정책과 지원이 지속적으로 이루어져야 할 것이다.

• International Journal of Industrial Entomology and Biomaterials
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• 제8권1호
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• pp.113-115
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• 2004

Six generations (P$_1$, P$_2$, F$_1$, BC$_1$, BC$_2$ and F$_2$) of four bivoltine silkworm crosses (SKAU-R-1 ${\times}$ Yakwei, SKAU-R-6 ${\times}$ Yakwei, CSR$_2$ ${\times}$ CSR$_4$ and SH$_{6}$${\times}$ NB$_4$D$_2$) were evaluated in a completely randomized block design with 5 replications for each treatment. The generation mean 2 in respect of 3 metric traits (single cocoon weight, single shell weight, and shell ratio ％), were subjected to Cavallis joint scaling test. Additive dominance model was found to be adequate in CSR$_2$${\times}$CSR$_4$ and SH$_{6}$${\times}$ NB$_4$D$_2$ for single cocoon weight and shell weight and SKAU-R-6 ${\times}$ Yakwei for shell ratio(％). Whereas, in rest of the crosses epistasis was evident in the traits under investigation. Magnitude of additive gene effect (d) was greater than dominance(h) in SH$_{6}$${\times}$NB$_4$D$_2$ and SKUA-R-6${\times}$Yakwei for shell ratio (％) and in CSR$_2$${\times}$ CSR$_4$ for shell weight. Thus selection for these traits in early segregating generations of these crosses would be effective for obtaining considerable genetic gain. gain.

• 한국도로학회논문집
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• 제11권2호
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• pp.17-25
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• 2009

본 연구의 목적은 사고위치별(유입부, 유출부, 교차로내 및 횡단보도) 로지스틱 회귀 교통사고 모형을 개발하는 것이다. 충북지방경찰청의 2004$\sim$2005년도 사고 자료와 현장조사 자료를 근거로, 교통사고와 관련된 기하구조 요소, 환경 요소 등이 분석되었다. 개발된 모형은 카이제곱 p 값은 0.000 그리고 Nagelkerke $R^2$값 0.363$\sim$0.819로 모두 통계적으로 유의한 것으로 분석된다. 개발된 모형의 공통 사고요인은 교통량, 횡단거리 및 좌회전전용차로이며, 특정변수는 교차로내 사고모형의 부도로 교통량, 그리고 횡단보도 사고모형의 주도로 U턴인 것으로 나타나고 있다. Hosmer & Lomeshow 검정은 유입부를 제외한 모형들은 p값이 0.05보다 크기 때문에 통계적으로 적합한 것으로 평가된다. 또한 정분류율 결과는 모든 모형식이 73.9% 이상으로 높은 예측력을 보이는 것으로 분석된다.

• 생물정신의학
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• 제25권4호
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• pp.110-117
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• 2018

Objectives This study aimed to investigate the relationship between depressive and anxiety symptoms and tardive dyskinesia (TD) and reveal the association of cognitive function and TD in patients with schizophrenia. Methods We recruited 30 schizophrenia patients with TD and 31 without TD from a national mental hospital in South Korea. To assess depressive and anxiety symptoms, the Beck Depression Inventory-II (BDI-II) and the Beck Anxiety Inventory (BAI) were conducted. Using the five-factor structure of the BDI-II and BAI, somatic anxiety, cognitive depression, somatic depression, subjective anxiety, and autonomic anxiety were assessed. Computerized neurocognitive function test (CNT) was performed to assess levels of cognitive functions. We compared the clinical characteristics, levels of cognitive functions, and depressive and anxiety symptoms between schizophrenia patients with TD and without TD. Chi-square test, Fisher's exact test, independent t-test and Mann Whitney U test were conducted to compare two groups. Pearson correlation analysis was conducted to evaluate relationships among the abnormal involuntary movement scale (AIMS), BDI-II, BAI, somatic anxiety, cognitive depression, somatic depression, subjective anxiety, and autonomic anxiety. Results The subjects with TD had significantly lower score on the cognitive depression than those without TD (t = -2.087, p = 0.041). There were significant correlations between the AIMS score and the BDI-II score (r = -0.386, p = 0.035) and between the AIMS score and cognitive depression score (r = - 0.385, p = 0.035). Conclusions Our findings suggest the inverse relationship between severities in TD and depression and support the assumption that there is an inverse relationship between the pathophysiology of TD and depression.

• 한국직업건강간호학회지
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• 제19권2호
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• pp.236-245
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• 2010

Purpose: The purpose of this study was to examine the relationship of psychosocial distress, intention to quit and nursing performance. Methods: The data were collected through structured questionnaires from 210 registered nurses in a general hospital. They were analyzed by descriptive statistics, t-test, ANOVA, scheffe test, Pearson's correlation coefficient and multiple regression with the SPSS WIN program. Results: The results of the analysis showed that the mean of the psychosocial distress was $25.38{\pm}7.26$, intention to quit was $3.51{\pm}0.78$, and nursing performance was $3.67{\pm}0.46$. In the correlation analysis, the nursing performance had negative correlation with psychosocial distress(r=-.371, p=.000) and intention to quit(r=-.211, p=.002). There were statistically significant differences in nursing performance depending on age, marital status, position and work experience. The psychosocial distress and age explained 15.1% of nursing performance. Conclusion: This study showed psychosocial distress and intention to quit affects the nursing performance. Therefore, nursing executives and unit managers need to concern on the significance of the stress management programs so that these can be organizational support.

• 한국간호교육학회지
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• 제16권2호
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• pp.177-185
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• 2010

Purpose: The purpose of this study was to examine the relationship between test anxiety, self-esteem and mental health. Method: Data were collected by structured questionnaires from 306 nursing students in a dormitory for the national examination for registered nurses. Collected data were analyzed by t-test, ANOVA, scheffe's test and Pearson's correlation coefficient and hierarchial multiple regression through the SPSS WIN program. Result: The results of the analysis showed that the mean for test anxiety was $79.70{\pm}18.74$ points, the degree of self-esteem was $28.26{\pm}5.02$, and mental health was $24.31{\pm}13.07$. In the correlation analysis, mental health positively correlated with test anxiety (r=.559, p=.000) and negatively correlated with self-esteem (r=-.141, p=.013). Test anxiety and subjective health status explained 36.4% of mental health. Conclusion: This finding of this study recommends that test anxiety control and self-esteem enhancement programs should be development for mental health promotion in nursing students taking the national examination for registered nurses.