• Title/Summary/Keyword: Gain schedule-control

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Effects of Controlled Compensatory Growth on Mammary Gland Development and Lactation in Rats

  • Moon, Yang S.;Park, Chung S.
    • Asian-Australasian Journal of Animal Sciences
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    • v.15 no.9
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    • pp.1364-1370
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    • 2002
  • The objective of this study was to examine the effect of compensatory growth nutritional regimen on mammary gland growth and lactation. One hundred twenty-two Sprague Dawley female rats (35 days of age) were randomly assigned to either a control or a stair-step compensatory nutrition (SSCN) feeding regimen or an alternating 2-2-3-3-week schedule beginning with 40% energy restriction for 2 weeks followed by re-alimentation (control diet) for 2 weeks. Pup weight gain and milk yield were improved 8% and 8 to 15%, respectively, by the SSCN regimen. The gene expression of $\beta$-casein was 2.3-fold greater in the SSCN group than in the control group during early lactation, but they were greater at all stages of the second lactation. The gene expression of insulin-like growth factor-I was 40% lower in the SSCN group than in the control group during early lactation of the second lactation, but during late lactation it was 80% greater than in the control group. The concentration of serum corticosterone tended to be higher in the SSCN group during the late stage of the first lactation. These results suggest that the stair-step compensatory nutrition regimen improves lactation performance and persistency by modulation of cell differentiation and apoptotic cell death.

Investigation of the Color Change and Physical Properties of Heat-treated Pinus koraiensis Square Lumbers (열처리 잣나무 정각재의 재색 변화 및 물성 조사)

  • Lim, Ho-Mook;Hong, Seung-Hyun;Kang, Ho-Yang
    • Journal of the Korean Wood Science and Technology
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    • v.42 no.1
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    • pp.13-19
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    • 2014
  • Three heat-treatment schedules were applied to $90{\times}90mm$ dimension square lumber of Pinus koraiensis, one of major domestic species, and their colors and physical properties were investigated for obtaining an optimum schedule. Each square lumber was heat-treated three times. The temperatures of $170^{\circ}C$ and $190^{\circ}C$, and the time of 9 hours and 13 hours were used for the first heat-treatment. The schedule of $190^{\circ}C$ and 7 hours were used for the next two heat-treatments. The averages of brightness $L^*$ decreased linearly as the heat-treatment repeated and its standard deviations also decreased slightly. While the averages of color difference ${\Delta}E^*$ increased linearly as the heat-treatment repeated and its standard deviations also increased slightly. The average compressive strength of the heat-treated specimen was higher than that of the control by 9%, which deviates from previous reports. ASE and WPG of the heat-treated specimens were measured to confirm that heat-treatment improved dimensional stability significantly.

Fatigue and its Related Factors in Patients on Hemodialysis (혈액투석환자의 피로와 관련 요인에 관한 연구)

  • 김혜령
    • Journal of Korean Academy of Nursing
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    • v.26 no.1
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    • pp.53-72
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    • 1996
  • The Purpose of this study was to identify characteristics of fatigue and the relationship between fatigue and related factors in patients on hemodialysis. This study was a survey study using a cross-sectional design. The subjects for this study were 101 patients on hemodialysis who were registered in the six hemodialysis clinics among a total of eleven clinics in Seoul. The period of data collection was from February 28, 1995 to May 2, 1995. Data were collected through an interview with a structured packet and the physiological data. The tools used in this study were the Visual Analogue Scale-Fatigue developed by Lee et al(1990) and translated by Lee(1991), the fatigue interview schedule developed by this researcher, Zung's self rating depression scale(Zung, 1965), the self-efficacy scale developed by Sherer et al(1982) and the Norbeck Social Support Questionnaire(NSSQ) translated by Oh(1984). The collected data were analyzed using descriptive statistics(mean, standard deviation, frequency, range), Pearson correlation coefficients and Stepwise multiple regression. The results were as follows ; 1. Characteristics of Fatigue of hemodialysis patients : 1) 79 of 101 hemodialysis patients complained fatigue. 2) The mean fatigue score as measured by the VAS-F was 36.2mm. 3) The mean duration of fatigue was 2.9 hours 2. Characteristics of fatigue related factors : 1) The physiologic factor which included Hgb, Hct, BUN, creatinine, potassium and interdialytic weight gain deviated from normal range. 2) The psychological factor which included depression and self-efficacy was about the same level as for patients with other chronic diseases. 3) The environmental factor which included social support had wide variation. 3. The relationship between fatigue and related factors : 1) Interdialytic weight gain in the physiologica factor was the only valuable with fatigue (p<.05) 2) The relationship between fatigue and the psychological factor of depression showed a positive and strong correlation(p<.05). According to the findings of this study, fatigue was highly correlated with the depression. This indicates that nurses should try to assess and control psychological factors when patients complain of fatigue rather than just considering physiological factors. Nursing has to develop effective nursing interventions to reduce fatigue in patients with chronic diseases using the relationship between fatigue and physiological, psychological and environmental factors.

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Influence of (-)-Hydroxycitrate on food Intake, Body Weight and Lipogenesis in Rats ((-)-Hydroxycitrate의 식이 투여가 흰쥐의 식이 섭취량, 체중, 지방대사 및 합성에 미치는 영향)

  • 김상배
    • Journal of Nutrition and Health
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    • v.30 no.2
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    • pp.123-131
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    • 1997
  • The influence of (-0-Hydroxycitrate(HCA), shown to be a competitive inhibitor of adenosine 5-triphosphate(ATP) citrate lyase, on food intake and body weight, serum triglyceride and cholosterol level, in vivo rates of fatty acid and cholesterol synthesis, and fat cell number and size was investigated. 3 groups of female, 5 weeks old Sprague Dawley rats, 8 animals each, were ad libitum meal-fed or pair-fed(3 hours from 10 : 00 to 13 : 00) AIN based high glucose diet for a total period of 8 weeks. Providing normolipidemic rats orally with 400mg of HCA formula containing approximately 20mg of HCA 1 hour prior to daily feeding schedule significantly depressed in vivo hepatic rates of fatty acid and cholesterol synthesis in the liver and adipose tissue. Serum triglyceride and cholesterol levels were significantly reduced by HCA. At the end of treatment period, the rats administered with HCA resulted in a significantly reduction in body weight gain. The reduction in weights was attributable to a significant decrease in fat cell size with a smaller extent, but not significant, reduction in fat cell number. Rats receiving HCA demonstrated less food intake than the controls ; however, this decreased caloric intake was not fully responsible for the HCA induced depression of hepatic and adipocytic lipogenesis, since experiment using pair-fed cojntrol rats showed, less magnitude but similar results. Both a anorectic and an antilipogenic properties of HCA seem to be responsible for this weight reduction activity of HCA. The outcome of this study suggest that metabolic regulation may be a feasible approach to the control of obesity and hyperlipidemia.

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An Empirical Study about Assessment of the JIT System: on korean semi-production firm

  • Lee, Eung-Kweon
    • International Commerce and Information Review
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    • v.7 no.2
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    • pp.75-94
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    • 2005
  • This study is focused on evaluating the computer-integrated just-in-time (CI-JIT) production system of a semi-conductor manufacturing firm in Korea. Approaching the mid-1980s, the emphasis was on low price, low-cost operations, and quality, especially in USA. American companies have shifted output to low-wage countries like the Philippines, Korea, Japan, Malaysia and allied countries that can make quality products at low prices. Korea and other Asian countries forego short-term profits to gain a solid foothold in a product market, recognizing that larger market share leads to lower cost and higher profit in the long run. They bring manufacturers and suppliers together to improve material management and operation management, using project teams that investigate topics, such as Just-In-Time(JIT)manufacturing, among others. The "Kanban" word means "card" in Japanese, and is used to indicate the desired final delivery schedule. The operation for a particular item produced is scheduled for a specific time. The same process is extended to the external suppliers. More recently, the cards are gradually being replaced by electronic procedures that follow the same concept. Its capacity must be capable of handling the various transactions required by the JIT coverage as well as some allowances for expanded applications.

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Effects of Dietary Nutrient Content, Feeding Period, and Feed Allowance on Juvenile Olive Flounder Paralichthys olivaceus at Different Feeding Period and Ration

  • Kim, Byeng-Hak;Cho, Sung Hwoan
    • Fisheries and Aquatic Sciences
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    • v.17 no.4
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    • pp.441-448
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    • 2014
  • We examined the effects of dietary nutrient content, feeding period, and feed allowance on compensatory growth, food use, chemical composition, and serum chemistry of juvenile olive flounder Paralichthys olivaceus. We placed 720 juvenile fish into 24 400-L flow-through round tanks (30 fish per tank).A $2{\time}2{\time}2$ factorial design (diet: control (C) and high protein and lipid (HPL) ${\time}$ feeding period: 8 and 6 weeks ${\time}$ feed allowance: 100% and 90% of satiation) was applied. Fish were hand-fed twice daily, based on the designated feeding schedule. Weight gain and food consumption were affected by both the feeding period and feed allowance, but not by diet. The food efficiency ratio was not affected by diet, feeding period, or feed allowance, but the protein efficiency ratio and protein retention were affected by diet and feeding period, respectively. We found that the full compensatory growth of fish was not achieved at a restricted feeding allowance.

Effects of a Stair-step Growth Pattern on Improvements in Meat Quality and Growth in Hanwoo Steers

  • Li, Z.H.;Lee, H.G.;Xu, C.X.;Hong, Z.S.;Jin, Y.C.;Yin, J.L.;Zhang, Q.K.;Piao, D.C.;Yang, U.M.;Choi, Y.J.
    • Asian-Australasian Journal of Animal Sciences
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    • v.23 no.11
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    • pp.1427-1435
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    • 2010
  • The present study was conducted to examine the effect of a stair-stepped feed intake pattern on growth, feed efficiency, and meat quality of Hanwoo steers. Twenty-seven 11-month-old Hanwoo steers were randomly divided into three groups. The control group was fed according to the Korean steer feeding program, and the other two groups were fed according to an alternated feeding schedule of 3-2-4-2 months. During the first three months of the experiment, treatment group 1 (T1) and treatment group 2 (T2) were fed 20% and 30% less than the control group, respectively. For the following two months, the T1 group was fed 20% more than the control group while the T2 group was fed 20% less than the control group. In the third step, T1 and T2 groups were fed 20% and 10% less, respectively, than the control group for four months. In the last two months, T1 and T2 groups were fed 20% more than the control group. After the stair-step feeding trial, steers were fed concentrated feed ad libitum for five months. The altered feed intake pattern did not affect daily body weight gain. However, daily feed intake tended to decrease and growth efficiency tended to increase in the two treatment groups compared to the control group. Altered feed intake also affected blood metabolite levels. The serum glucose and BUN level of the T1 group increased in the first re-fed period compared to the T2 and control groups. The serum cholesterol level of the T2 group decreased in the first restricted-re-fed growth period compared to the T1 and control groups. The serum NEFA levels of the two treatment groups increased from the first restricted period compared to the controls. The serum insulin level of the T2 group increased in the last period compared to the T1 and control groups. Regarding meat yield index, the control group was significantly higher than the T2 group (p<0.05). Regarding meat yield grade, the carcass back fat thickness of the T2 group was significantly higher than the control group (p<0.05). In marbling score, the T1 group was the highest (4.9), followed by the control group (4.1) and the T2 group (4.0). These results indicate that using a stair-stepped growth pattern (T1) can contribute to improvements in growth efficiency and muscle marbling.

A Comparative Study of the Effects of Public Health Nursing: Home Visits to Patients with Tuberculosis (결핵환자 간호에 있어서 가정방문이 미치는 영향에 관한 조사 연구)

  • 서미혜
    • Journal of Korean Academy of Nursing
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    • v.4 no.1
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    • pp.151-161
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    • 1974
  • Home visiting as a Public Health Horsing function is believed to be of therapeutic value to, the patient. However, home visiting is time consuming and expensive. Is the gain in knowledge and treatment for patients with Tuberculosis in Korea enough to make the necessary outlay in finances and personnel worthwhile\ulcorner While this study does not attempt to completely answer this question it does, under the following objectives, attempt to answer part of the question. The objectives of the study were to l) ascertain if there is a difference between patients, who receive home visits from the public Health Nurse and those who do not, in the following areas: a) their compliance with medical regimen, b) their ability to answer general questions about Tuberculosis, and c) their compliance with medical advice concerning prevention (B.C.G. immunization) and early diagnosis (contact X-rays), and 2) to determine if there is any correlation between the patient's answers to questions about Tuberculosis and his action both in the areas of treatment and prevention. The patients participating in the study were all newly diagnosed patients at Kwangju Christian Hospital. A control group and an experimental group were selected. The patients in the control group were seen according to the regular schedule at the Kwangju Christian Hospital except that they received no home visits from the Public Health Nurses. The patients in the experimental group were visited on an average of three times during the first two months of their treatment by the investigator, a Public Health Nurse. At the end of two months the patients in the two groups were compared as to compliance both in the treatment and preventive areas. They were also compared according to their answers to a questionnaire regarding both the prevention and treatment of Tuberculosis. The following results were obtained : 1. Patients in the experimental group (68.2%) showed a significantly higher compliance rate for medical treatment than patients in the control group (43.2%). 2. Patients in the experimental group (87.5%) showed a higher compliance rate for B.C.G. immunization than those in the control group (40%). 3. Women patients in the experimental group showed a higher mean score (7.2$\pm$2.6) on the questionnaire than did women in the control group (6.2$\pm$3.4). The results of this study seem to indicate that while home visiting is beneficial to the patient with Tuberculosis as far as treatment is concerned, something more concrete needs to be done if home visiting is to help the patient learn more about Tuberculosis and its prevention. Further study is indicated in the following areas: 1) A similar type of study over a longer period of time involving more subjects and using Korean Public Health Nurses to make the home visits. 2) Study to develop an adequate approach to education considering the problems unique to patients with Tuberculosis living in Korea.

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Relationships between compliance and health-related quality of life in patients with hemodialysis (혈액투석환자의 이행과 건강관련 삶의 질 간의 관계)

  • Cha, Jieun
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.16 no.10
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    • pp.6495-6503
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    • 2015
  • The purpose of the study was to evaluate patients' compliance with the hemodialysis and to investigate relationships between compliance, physiological parameters, and health-related quality of life. Data were collected from 220 patients at 27 local hemodialysis clinics. Compliance was measured with Sick-role Behavioral Compliance including interdialytic weight gain, serum potassium, and phosphorus. Health-related quality of life was assessed using Medical Outcomes Study Short Form-12. Data were analyzed using descriptive statistics, t-tests, ANOVA, and Pearson correlation. Total compliance scored 2.92 out of 4 points on average. Among fifteen items, 'I keep on my dialysis schedule(time and date)' was the highest score. There were differences in the scores for compliance according to age, marital status, and dialysis period. Statistically significant correlations were found between four compliance items(medication, infection control, sleep, eating vegetable and fruit) and health-related quality of life. The results of the study indicate that a patient-centered approach would be helpful to improve quality of life in patients with hemodialysis. Healthcare providers need to understand the patients' perspectives by identifying what is important to patients and taking patient values and priorities into account.

Red Color Light at Different Intensities Affects the Performance, Behavioral Activities and Welfare of Broilers

  • Senaratna, D.;Samarakone, T.S.;Gunawardena, W.W.D.A.
    • Asian-Australasian Journal of Animal Sciences
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    • v.29 no.7
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    • pp.1052-1059
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    • 2016
  • Red light (RL) marked higher weight gain (WG) and preference of broilers compared to other light colors. This study aimed to investigate how different intensities of RL affect the performance, behavior and welfare of broilers. RL treatments were T1 = high intensity (320 lux), T2 = medium intensity (20 lux); T3 = dim intensity (5 lux), T4 = control/white light at (20 lux) provided on 20L:4D schedule and T5 = negative control; 12 hours dark: 12 hours day light. Cobb strain broilers were used in a Complete Randomize Design with 6 replicates. WG, water/feed intake, feed conversion ratio (FCR), mortality, behavior and welfare were assessed. At 35 d, significantly (p<0.05) highest body weight ($2,147.06g{\pm}99$) was recorded by T3. Lowest body weight ($1,640.55g{\pm}56$) and FCR (1.34) were recorded by T5. Skin weight was the only carcass parameter showed a significant (p<0.05) influence giving the highest (56.2 g) and the lowest (12.6 g) values for T5 and T1 respectively. Reduced welfare status indicated by significantly (p<0.05) higher foot pad lesions, hock burns and breast blisters was found under T3, due to reduced expression of behavior. Highest walking ($2.08%{\pm}1%$) was performed under T1 in the evening during 29 to 35 days. Highest dust bathing ($3.01%{\pm}2%$) was performed in the morning during 22 to 28 days and highest bird interaction (BI) ($4.87%{\pm}4%$) was observed in the evening by T5 during 14 to 21 days. Light $intensity{\times}day$ $session{\times}age$ interaction was significantly (p<0.05) affected walking, dust bathing and BI. Light intensity significantly (p<0.05) affected certain behaviors such as lying, eating, drinking, standing, walking, preening while lying, wing/leg stretching, sleeping, dozing, BI, vocalization, idling. In conclusion, birds essentially required provision of light in the night for better performance. Exposed to 5 lux contributed to higher WG, potentially indicating compromised welfare status. Further researches are suggested to investigate RL intensity based lighting regimen that favors for both production and welfare of Broilers.