• 간호행정학회지
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• 제21권2호
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• pp.212-222
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• 2015

Purpose: This study was conducted to identify correlations in hospital nurses' work environment, emotional labor and happiness index to provide basic resources for nurses' happiness at work. Methods: Resources were gathered from 291 nurses who agreed to participate. Random sampling of nurses in nine hospitals in G-do was done between July 15 and August 14, 2014. Data were analyzed using ${\chi}^2$ tests, independent t-test, One-way ANOVA, Pearson correlation coefficients and multiple hierarchical regression with SPSS/WIN 18.0. Results: Mean scores (scale of 5) were nurses' work environment, 2.81, emotional labor, 3.24, and happiness index, 2.94. There were significant differences on the happiness index for: age, marriage, children, clinical experience, position, payment, and future work plans and a negative correlation between work environment and emotional labor, emotional labor and happiness index but a positive correlation between happiness index and work environment. Happiness index was influenced by work environment, emotional labor, future work plans. Explanatory power of these variables was 26%. Conclusion: Based on the findings of this study, so it is necessary to improve the work environment and reduce the frequency of emotional labor in order to increase the happiness index of hospital nurses.

• 호남수학학술지
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• 제19권1호
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• pp.87-95
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• 1997

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2005년도 학술발표회 논문집
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• pp.270-274
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• 2005

우리나라의 경우 매년 인구증가와 도시화로 인한 용수부족으로 국지적인 제한 급수를 실시하는 등 점차 물 문제가 중요한 사회 문제로 떠오르고 있는 가운데 새로운 대체 용수원의 개발이 시급하게 대두되어지고 있다. 이 가운데 지하댐(Ground-Water Dam) 건설에 의한 지하수 자원의 개발이 제안되고 있다. 수자원의 계절적 편중에 의한 수자원 최적화 활용을 위해 지하댐 최적 운용기법의 개발이 필요한데 이를 위해 본 연구에서는 지하댐 운영지표(Groundwater Dam Operating Index, G.O.I)를 제안하였다. 이를 위해 쌍천 유역의 수문학적 자료와 강수의 경향, 지하수위 그리고 지하댐 운영 자료를 이용하여 강수와 지하수위 상관관계를 비교 분석하였다. 분석한 결과 일강우량 90일 이동평균의 대수값이 지하수위 변동특성과 가장 높은 상관도를 보였다. 이 결과 값을 G.O.I 로 정의 하였으며 G.O.I 지표가 1보다 작은 구간과 지하댐 운영시 제한급수가 실시되었던 구간이 거의 일치하는 것으로 나타났다. 따라서 G.O.I 를 이용한 지하댐 실시간 의사결정 시스템 구성이 가능할 것으로 판단하였다.

• 한국가금학회지
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• 제16권4호
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• pp.201-207
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• 1989

본 실험은 우리나라 재래계의 육종 기초 자료를 얻고자 염색체의 형태와 G-, C-banding pattern을 조사하여 보았다. 시료는 성장중인 초기배아를 이용하였고 염색체 분양분석은 현재 Ohio 대학에서 시행하고 있는 방법을 다소 수정하여 행하였다. 실험결과 macrochromosome의 armratio와 centromeric index 그리고 relative length에서 다소 개량종과 차가 있으나 designation에는 차이가 없었다. Densitometric recording에 나타난 graph의 정점은 G-banding에서 1, 2, 3, 4, Z, 그리고 5번의 각 염색체에서 각각 21, 14, 12, 8, 11 그리고 4 개였고, C-banding에서는 各各 16, 13, 9, 9, 9,그리고 4 개였다. 이러한 banding pattern은 분염분석 방법에 따라 더 많이 발현시킬 수 있으리라 생각하며, banding pattern 에 의해서 genetic marker를 시사하기 위해서는 더 많은 연구가 이루어져야 할 것이다.

• 한국환경과학회지
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• 제12권3호
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• pp.299-306
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• 2003

The purpose of this study is to investigate the characteristics of water quality in Jeju harbor and to estimate pollutant loadings discharged into Jeju Harbor. To know characteristics of water quality in Jeju harbor, and pollutant loadings of Sanzi river, we have investigated from August, 2000 to May, 2001. The results showed that the concentrations of COD, DIN and DIP were in the range of 1.00∼4.85 mg/L (mean 2.15 mg/L), 2.14∼74.0 $\mu\textrm{g}$-at/L(mean 12.20 $\mu\textrm{g}$-at/L) and 0.52∼4.00 $\mu\textrm{g}$-at/L(mean 1.18 $\mu\textrm{g}$-at/L), respectively. These values were under III class of seawater quality criteria. The ratio of nitrogen to phosphorus was lower than 16 except for Station 1 in Jeju harbor. Therefore, nitrogen was playing an important role in phytoplankton growth as limiting factor in Jeju harbor. The mean values of eutrophication index were exceeding 1, which was the eutrophication criteria. The results of estimating pollutant loadings at Sanzi river are 0.30 ton/day for COD, 300 kg/day for DIN and 18.0 kg/day for DIP, respectively.

• Asian-Australasian Journal of Animal Sciences
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• 제17권5호
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• pp.684-687
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• 2004

A study was conducted to determine the effect of live weight of pheasants on egg production and egg quality characteristics. A total of 48 ring-necked pheasants were divided into control, heavy, middle and light BW groups. Live weights of the control were 1,187 g, 1,352.92 g for heavy group, 1,247.92 g for middle group and 1,003.33 g for light group. Egg production of groups were found as 47.32, 42.82, 45.79 and 46.51% respectively, in 10 weeks of period. There were no statistical differences on egg production among the groups. The effect of live weight on egg weight, shape index, specific gravity, shell weight, shell thickness, Haugh Unit, yolk weight and albumen weight were found statistically significant (p<0.05). The effect of live weight on albumen index, membrane weight and membrane thickness were found not important (p>0.05). On the other hand, other important factors to be effective on the egg quality of pheasants should be investigated. As a result of this study, live weight of pheasant hens is not an important factor to obtain high egg production in pheasants. But, body conformation of breeding materials should be in good conditions.

• 에너지공학
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• 제13권1호
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• pp.75-81
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• 2004

본 연구에서는 ZZF탈황제의 내마모성을 개선하기 위하여 산화칼슘함량을 1, 3, 5, wt%정도 첨가한 탈황제를 제조하여 마모실험을 수행하였다. 마모실험전과 후의 탈황제 형상을 SEM으로 관찰하고 입자크기분포를 쿨터계수기로 측정하였다. 산화칼슘을 첨가하지 않은 ZZF 탈황제의 마모도는 Al=28.3%, CAI=10.8% 정도였다. CaO 함량이 3 wt%인 ZZFCa-3 탈황제의 마모도(Al=17.3%, CAI=8.8%가 가장 낮았다. ZZFCa 3 탈황제가 입자모양과 평균입도가 잘 유지되었다 ZZFCa-3 탈황제의 황화 및 재생실험을 수행하였다. 석탄가스 중의 10000 ppm수준의 H$_2$S를 1 ppm 이하로 정제할 수 있었으며, 탈황제의 황수용능력은 최대 28.8 g S/100 g sorbent정도 유지되었다. 재생된 탈황제의 XRD분석에서 CaSO$_4$실 생성은 관찰되지 않았으며, 황화반응에서도 SO$_2$ slippage가 관찰되지 않았다. 이러한 결과로 국내 고유 기술에 의한 반응성, 내구성, 내마모성이 모두 만족되는 고온건식 탈황제를 개발할 수 있었다.

• Toxicological Research
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• 제20권3호
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• pp.213-223
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• 2004

This work aimed to study the effectiveness of cellular oxidative parameter (malondial-dehyde, protein carbonyl, and 8-hydroxy-2'deoxyguanosine). The experimental groups were aluminum treated rats and control rats. Aluminum treatd rats were given intraperitoneally aluminum nitrate nonahydrate ($Al^{3+}$, 0.2 mmol/kg) daily for 30 days except Sunday. Control rats were injected 1 ml of saline. After the dose, rats were decapitated and hippocampus and cerebral cortex were removed. The measured parameters were tissue malondialdehyde (MDA, index of lipid peroxidation), protein carbonyl (index of protein oxidation), 8-hydroxy-2'-deoxy-guanosine (8-OHdG, index of DNA oxidation), reduced glutathione (GSH) levels as well as glutathione reductase (GR) and catalase. AI concentrations in the tissues were also measured. All results were corrected by tissue protein levels. The results were as followed; 1. The concentrations of AI in the cortex and hippocampus were significantly higher in the AI-treated rats than in the control rats. 2. Antioxidative enzyme's activity, catalase and GR, were significantly higher in the AI-treated rats than the control rats. GSH levels were also higher in the AI-treated rats. 3. MDA, protein carbonyl, and 8-OHdG concentration of AI-treated rats were significantly higher than those of control rats. 4. The concentrations of antioxidants, and oxidative stress parameter were correlated with the concentrations of AI in hippocampus and cerebral cortex. Catalase and GR activity were also correlated with the concentration of AI. Based on these results, it can be suggested that intraperitoneally injected AI was accumulated in the brain and induced the increase of antioxidant levels and antioxidative enzyme activity. Also, the oxidative products of cellular macromolecules are significantly related to tissue AI concentration. Therefore MDA, protein carbonyl, and 8-OHdG are useful markers for oxidative stress on cellular macromolecules.

• 한국수산과학회지
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• 제54권6호
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• pp.1007-1016
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• 2021

This study examined the characteristics and seasonal distribution patterns of subtidal marine algal communities along the east coast of Korea, from 2016 to 2017, and recorded the coverage ratio (%) by the algal type. During the study period, 134 marine algae species (16 green, 29 brown, and 89 red) were identified at the survey sites. The maximum number of species was observed at the Nagok site (70 species), and the minimum at the Gisamoon site (50 species). The total average biomass (dry weight) during the survey period was 66.22 g/m², including green algae (2.19 g/m²), brown algae (38.10 g/m²), and red algae (25.94 g/m²). The dominant seaweeds in the vertical distribution based on coverage rates (%) were Sargassum yezoense and Dictyopteris divaricata at the upper, Symphyocladia latiuscula and Undaria pinnatifida at the middle, and Agarum clathratum subsp. yakishiriense and Plocamium telfairiae at the lower sections of the distribution. Richness, evenness, and diversity index, calculated based on the biomass of the abundant species, were estimated to be 6.36, 0.55, and 1.98, respectively, over the entire sea area. Based on the evaluation of the environmental states using community indices, the ecological evaluation index (EEI-c) of subtidal marine algal communities along the east coast of Korea was marked as 'good-moderate'.

• Bulletin of the Korean Chemical Society
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• 제33권9호
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• pp.2861-2866
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• 2012

Results of the comparisons of various density functional theory (DFT) methods with different basis sets for predicting the molecular geometry of TPOP24N-Oxide macrocycle, an oxoporphyrin N-oxide, are reported in this paper. DFT methods, including M06-2X, B3LYP, LSDA, B3PW91, PBEPBE, and BPV86, are examined. Different basis sets, such as 6-$31G^*$, 6-31+G (d, p), 6-311+G (d, p), and 6-311++G (d, p), are also considered. The M06-2X/6-$31G^*$ level is superior to all other density functional methods used in predicting the geometry of TPOP24N-Oxide. The geometries of regioisomeric chlorin N-oxide and oxoporphyrin N-oxide are reported using M06-2X/6-$31G^*$ method. The geometry effects of oxoporphyrin and chlorin N-oxide regioisomers are increased ${\beta}-{\beta}$ bond lengths by N-oxidation because the bond overlap index due to charge transfers is decreased. In N-oxidation ring (II, III), angles that include ${\beta}-{\beta}$ bond length increase as the bond overlap index of ${\beta}-{\beta}$ bond is decreased by N-oxidation. The potential energy surfaces of chlorin N-oxide and oxoporphyrin N-oxide are explored by M06-2X/6-$31G^*$, and single-point calculations are performed at levels up to M06-2X/6-311++G (d, p). Total and relative energies are then calculated. The results indicate that chlorin 24 N-oxides are more stable than chlorin 22 N-oxides in chlorin N-oxide regioisomers. Moreover, TPOP24N-Oxide is less stable than TPOP22N-Oxide.