VE기법을 이용한 자동차 개발부품 원가절감에 관한 연구 : D사의 사례를 중심으로

채동수 漢陽大學校 産業經營大學院 2005 국내석사

산란계 사료 내 뽕잎과 게르마늄의 첨가 급여가 산란후기 생산성과 계란품질에 미치는 영향

채동수 전북대학교 일반대학원 2018 국내석사

This study was conducted to investigate the effects of dietary Mulberry Leaves(ML) and Germanium on the performance and egg quality, blood composition of laying hens from 74 to 85 weeks of age. In Experiment 1, Seventy four weeks old, three hundred sixty Hyline Brown laying hens were replaced into 4 dietary treatments with 5 replicate of 18 birds in each. Basal diet contained ME 2750 kcal/kg, CP 15%. Treatments were divided into ML addition(0, 0.2, 0.4, 0.8%). Egg production, daily eggmass, feed intake, feed conversion and egg quality were measured in every four week. Blood was taken at the end of experiment. Egg production and daily eggmass of birds fed ML was higher than control, but was not statistically different. The feed conversion was significantly (P<0.05) improved in ML treatment compared to control(P<0.05) from 82 to 85 weeks of age. However, egg quality was not significantly different among the treatments. Serum HDL increased (21.97 mg/dl) significantly in 0.4% dietary additional ML compared with control (17.55 mg/dl). This experiment indicate that Mulberry leaves can be added in the laying hen diet upto 0.4% during the finishing stage. In Experiment 2, 360 Hyline Brown laying hens were divided into four dietary treatments with five replicate of 18 birds in each from 74 to 85 weeks of age. Basal diets was composed of ML Basal diets composition. Germanium were added with basal diets(0, 1.0, 2.0, 4.0%). Egg production, daily eggmass, feed intake, feed conversion and egg quality were measured in every four week. Blood and yolk were also taken at the end of experiment. Daily egg mass of birds fed 2% Germanium addition diets(47.22 g) was higher(48.52 g) than control during the finishing stage. Haugh unit was also higher at all 3 period (77, 81 and 85 weeks) in 2% Germanium additional diet treatment(P<0.05). Eggshell breaking strength observed the highest in 2% germanium addition group(P<0.05) at 81 weeks of age. Eggshell thickness was significantly (P<0.05) increased in 2% germanium addution group (0.370mm) compared with control (0.352) at 85 weeks of age. Addition of Germanium reduced the serum cholesterol, but creased HDL cholesterol(21.29 mg/dl). As the results of this experiments, 2% Germanium addition of hens diet improved the egg production, eggshell quality and cholesterol composition during the finishing stage of laying hens. The results of this experiments suggested that the dietary Mulberry leaves and Germanium supplementation of laying hens diet improved the egg production eggshell quality during the finishing stage.

시텍스트 해석 모형의 문학교육적 연구

채동수 아주대학교 교육대학원 2000 국내석사

대구광역시 북구의회 의정활동의 문제점과 개선방안

채동수 경북대학교 행정대학원 2010 국내석사

본 연구는 대구광역시 북구의회를 선정하여 급속한 환경변화와 지역주민의 요구에 부응할 수 있도록 지방의회의 가장 중요한 기능을 분석하여 문제점을 도출하고 개선방안을 도출하고자 한다. 구체적으로 말하면 첫째, 지방의회와 지방의원들의 지역주민의 대표기능․정책결정기능․집행기관견제기능을 분석․검토하고 둘째, 검토된 문제점을 토대로 하여 향후 지방의회를 합리적으로 운영하는데 필요한 개선방안을 모색하여 지방의회의 자체적인 역량강화와 지역주민의 복지증진과 나아가서 지방자치 발전을 증진시키는 데 그 목적이 있다.

고온환경에서 서로 다른 음용수가 가금의 생산과 면역에 미치는 영향

채동수 전북대학교 일반대학원 2021 국내박사

The temperature in the recent summer has been gradually increasing by the global warming. As a result, productivity of many livestock is decreasing, and economic losses are incurred for farms. Drinking water is needed not only for various physiological activities, but also for body temperature control. In particular, drinking water management is very important in high temperature environments. This study was conducted to investigate the effects of different drinking water on performance and immunity of poultry to prevent the heat stress. In experiment 1, different drinking water temperature was applied to investigate the effect on performance, hormone concentration and blood composition of laying hens during hot-humid weather (33℃ and 60%). A total of four hundred thirty-two birds, fifty-three weeks of age Hy-Line brown laying hens divided into three treatments with eight replicates of twelve hens for five weeks. Treatments were consisted of 14.5, 24.0 and 32.5℃ water temperature. Productive performances were evaluated by measuring egg production, egg weight, feed consumption, egg mass and feed conversion of eggs. At the end of trial, egg quality traits were measured, and the physiological performance determined by measuring some biochemical traits of blood and hormone concentration. Results of this study showed that egg production and daily egg mass were significantly (p<0.05) higher in 14.5℃ water treatment than 24.0 and 32.5℃. Also, there was significant (p<0.05) increase of shell strength in 14.5 and 24.0℃ water temperature treatment compared to that of 32.0℃ treatment. The concentration of GH and IGF-I of serum and liver showed significant increase as the water temperature decreased(p<0.05). Furthermore, serum corticosterone, AST, cholesterol and triglyceride were significantly (p<0.05) improved in hens drunk 14.5℃ water compared with 24.0 and 32.5℃ water. It could be concluded that 14.5℃ drinking water temperature can improve the performance, egg quality and blood during summer season. In experiment 2, the purpose of this study was to investigate the effects of cold water on the cellular and humoral immunity from heat-stressed laying hens. A total number of seventy-two, Hy-line brown laying hens (seventeen weeks of age) was placed into three treatments with four replicates of six hens per pen. The treatments consisted of CT-NW (Tap water: 25±1°C in thermoneutral temperature), HT-NW (Tap water: 25±1°C in high temperature) and HT-CW (tap water: 15±1°C in high temperature). Egg production and weight was recorded daily. At the end of study, blood composition were determined. The results showed recovered effect from the heat stress on egg production and feed intake by HT-CW treatment. HT-CW restored the contents of PBMC lymphocyte from B-cell (BU-Ia), helper T cell (CD4) and the ratio of helper and cytotoxic T cell (CD4/CD8). Moreover, there was same significant (P<0.05) pattern on the level of mRNA for IL-2 and INF-γ as well concentration of immuno-cytokines in plasma IL-2, INF-γ and IgG in HT-CW. In conclusion, cold water enhanced the cellular and humoral immunity for heat stress laying hens. In experiment 3, the effect of ion drinking water was applied to investigate on the performance, blood composition and serum biochemical properties of laying hens in a high-temperature environment. A total of one hundred and eighty laying hens were randomly divided into three treatments with five replicates. Ion water (IW), tap water (TW) and cold water (CW) treatments were applied to individual cage of from twenty four to twenty-seven weeks old laying hens. The effects of these treatments on production performance was measured daily, and at the end of the experiment, egg quality and blood composition were analyzed. The results showed that the egg production, egg weight, and feed intake of hens were significantly (P<0.01) improved in the IW group compared with those in the TW group but did not differ from those in the CW group. Egg quality parameters such as albumen height, Haugh unit, and eggshell thickness were found to be higher in the IW than in the TW group (P<0.05); however, no significant differences were observed in comparison with the CW group. Moreover, serum Ca and P concentrations tended to increase (P<0.10) in the IW group, and serum HDL cholesterol and albumin levels were greater (P<0.05) in response to IW than TW treatment. IW drinking effect was confirmed to be similar as the CW. It showed potential as a feeding management to drink water of hens in the summer season. Experiment 4 was conducted to investigate the effects of various types of drinking water on performance, meat quality and blood biochemical composition of broiler chicks under high temperature conditions. 368 days old broilers (Ross X Ross) were allocated with four treatments for five weeks. Treatments consisted of tap water (TW; 29.5℃), ion water (IW; 29.5℃), cold water (CW; 15℃) and IW+CW (ICW; 15℃) with six replicates. Weight gain, feed intake and feed conversion were weekly measured until five weeks of age from eight days old. Blood and meat samples were taken and measured at the end of experiment. In the result, Weight gain, feed intake and feed conversion significantly (p<0.05) higher in ICW treatment than TW, IW and CW at five weeks of age. Furthermore, pH and cooking loss of meat showed lower (p<0.05) in TW compared to that of other treatments. The serum triglyceride and HDL cholesterol of birds drunk IW, CW and ICW were improved (p<0.05) relative to that of TW. The results of this experiment indicated that ICW can improve the performance, meat quality and HDL cholesterol of broiler chicks under high temperature season. In conclusion, cold and ionized drinking water during the high temperature season improved the performance and immunity of laying hens and broiler chicks.