• Korean Journal of Organic Agriculture
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• v.29 no.4
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• pp.507-521
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• 2021

The livestock farmers are producing under uncertainties such as Foot-and-Mouth Disease (FMD) and Free Trade Agreement (FTA). The purpose of this study is to strengthen the management capabilities of Hanwoo farmers to prepare them for the uncertainties just mentioned. To this end, this study was conducted to find the optimal rearing period in order to reduce the feed cost, which accounts for the largest portion of the operation cost of Hanwoo. Using the universal lattice model, 41,139 of 289,000 Hanwoo slaughter data from 2010 to 2019 were used for the FMD period and 246,605 heads for the general period. The results show that the maximum cutoff price of Hanwoo steer is 6,394,457 won at the 4th week of 27 months of age in general period, where as 6,242,752 won at the 2nd week of 26 months of age in the FMD period. Therefore, it is judged that it will be helpful for Hanwoo farms to maximize their business profits by slaughtering one month and two weeks earlier in the FMD period than in the general period. In addition, Hanwoo farmers need to break away from the conventional rearing method and improve their management efficiency through a more flexible rearing method.

• Korean Journal of Child Studies
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• v.23 no.1
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• pp.105-119
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• 2002

This study of child-rearing practices and daily activities of children during the Chosun dynasty was conducted through analysis of 91 traditional paintings of the period. Genre, figure, folk, and landscape paintings were included in the analysis. Findings were that child-rearing was strongly focused on the family. Generally, the mother was shown as the primary caregiver of the child. Grandmother, father, and grandfather also played a role in raising the child. The daily activities of the children consisted of helping with household chores, assisting the elderly, doing small jobs, studying, playing, performing for family members, and participating in family rituals and community events. Differences in child-rearing methods and contents of daily activities varied by gender and socio-economic status.

• Korean Journal of Veterinary Research
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• v.57 no.3
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• pp.189-195
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• 2017

The isolation rate of Escherichia (E.) coli in poultry litter was investigated at 44 broiler farms, 20 that used fresh litter and 24 that used recycled litter. The patterns of resistance to antibiotics of the E. coli isolates were compared. In litter sampled before the rearing period, the isolation rate of E. coli was higher at farms that used fresh litter; E. coli was present in the litter in 94.5% (35 out of 37 flocks tested) of the farms that used fresh litter vs. 51.2% (21 out of 41 flocks) of the farms that used recycled litter. The susceptibility of the 93 isolates of E. coli to 13 antibiotics was studied. Before the rearing period, E. coli isolates from the farms that recycled litter showed higher resistance rates than isolates from farms that replaced litter with fresh litter. Comparing the antibiotic resistance patterns of isolates from litter sampled before and at the end of the rearing period, the antibiotic resistance rates at the end of the rearing period increased dramatically compared with rates before the rearing period.

• Journal of Environmental Science International
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• v.22 no.6
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• pp.773-777
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• 2013

This study examined the effects of cage rearing system and backyard raising system on fatty acid profile of egg in laying hens during 9 weeks. Two hundred hens, 70-wk-old, Hy-line Brown, were used in this study and fed basal diets. 100 hens, randomly collected from facility, were transferred to cage rearing system and 100 remaining hens were moved to backyard raising system. For overall period, higher unsaturated fatty acid percentages in two different rearing systems than did saturated fatty acid (SFA) were observed. In unsaturated fatty acid compositions, both rearing system showed a higher mono unsaturated fatty acid (MUFA) contents than poly unsaturated fatty acid (PUFA) contents. Egg quality traits of laying hens reared in backyard system had considerably lower contents of SFA and higher contents of MUFA compared with eggs from cage rearing system (P<0.05). In addition, eggs from cage rearing system resulted in a significantly lower n-3 contents and higher n-6:n-3 ratios and CLA contents in comparison with backyard raising system (P<0.05). However, no significant effects of two different rearing systems on PUFA, PUFA:SFA ratio, and n-6 contents were observed during the experimental period. In conclusion, this result suggests that cage rearing system and backyard raising system will play an important role in improving egg production as functional foods.

• Proceedings of the Korean Society of Environment and Ecology Conference
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• 2006.10a
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• pp.98-102
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• 2006

We studied the behavior of black vultures breeding in Erdenesant, Mongolia through time budget observation. We observed a pair of black vulture for 115 days from April 30 to August 22, 2005, of which 15 days were before hatching and 100 days of brood rearing. The egg hatched on May $14^{th}$. Incubation was done by both a male and female vultures, but the period covered by the male vulture(56.82%) was longer than that by the female one(34.62%). In the early days of brood rearing, time spent by the female vulture at the nest took 54.9 % and it was 19.27% for the male. In the middle of brood rearing period, just inaction and preening were noticed, as they watched their chicks for a long time without sheltering chick under the parent's body. Late brood rearing period was characterized by less chick care and adults mostly stayed in the nest only when to feed the chicks. During breeding time, both the male and the female vulture fed only the chicks and did not give food to each other. During rearing period, the male vulture fed the chick more often than female.

• Journal of Sericultural and Entomological Science
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• v.16 no.2
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• pp.141-146
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• 1974

This study was carried out to observe the possibility of special rearing of young silkworm for a simple cooperative rearing in the indoor vinyl house. The results of this study are as follows. 1. Temperature and humidity were regulated reasonably in the indoor vinyl house in comparison with general rearing and covered rearing with damp-proof and all workings in it were more convenient. 2. Duration of silkworm life was same in the covered rearing with damp-proof and indoor vinyl house, but general rearing was longer spring rearing silkworm period, 5 hours and autumn young silkworm period. 6 hours than indoor vinyl house. 3. In the mortality ratio, missing larvae of general rearing was more than any other treatments in spring and autumn. There was no difference between covered rearing with damp-proof and indoor vinyl house rearing, but missing larvae seemed to be a little indoor vinyl house. 4. In the individual cocoon ratio there was no significance in spring and autumn, but best cocoon ratio was high in the special rearing and good and low cocoon ratio was high in the general rearing. 5. In the cocoon weight of 10,000 3rd moulted silkworm. cocoon weight of general rearing was less than any other treatments in spring rearing season, and that of covered rearing with damp-proof and indoor vinyl house rearing It was same result. 6. There was no significance in the cocoon layer ratio in spring and autumn, but that of covered rearing with damp-proof and indoor vinyl house was high in comparison with general rearing. 7. As showed above, it is considered that the rearing of indoor vinyl house is worth as special rearing of young silkworm for simple cooperative rearing because it showed good records with three times feedings a day in comparison with general rearing and covered rearing with damp-proof.

• Journal of Korean Public Health Nursing
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• v.26 no.3
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• pp.561-571
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• 2012

Purpose: This study was designed to evaluate the effects of a newborn care education promotion program on child-rearing knowledge, child rearing stress, and child rearing self-efficacy of immigrant pregnant women. Methods: The subjects were 23 immigrant pregnant women who voluntarily participated in the study in D city. The program was provided, once a week for 90 minutes for a period of 3 weeks. The outcome variables were child-rearing knowledge, child-rearing stress, and child rearing self-efficacy. Data was collected from April 4 to June 24, 2011, through self-administered questionnaires. Results: The program significantly improved child rearing knowledge, child rearing stress, and newborn care self-efficacy for married immigrant pregnant women who participated in the program compared to women who did not participate. Conclusion: The results suggest that the reproductive health promotion program has an affirmative effect on child-rearing knowledge, child rearing stress, and child rearing self-efficacy of married immigrant pregnant women. It is suggested, therefore, that the educational program be presented to married immigrant woman at public health centers to enhance their confidence in child-rearing.

• Journal of Korean Academy of Nursing
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• v.27 no.2
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• pp.454-464
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• 1997

The purpose of this study was to identify the correlation between the intention of pregnancy and the child rearing attitudes of mothers with infants. The data was collected from 138 mothers by means of an interview and questionnaire in a period from April 1 to April 30, 1997, when they came to have their infants vaccinated at one hospital and one health care center. The collected data was analyzed by means of the SPSS Program using percentage, means and standard deviation in each area and the ANOVA and Pearson Correlation Coefficient. The results of this study were as follows : 1. It showed that the mother's degree of intention of pregnancy was 3.90(±1.49) among the possible score of 0∼5 and the score of child rearing attitudes was 70.1 among the possible score of 20∼100. The mom score of the items was 3.50(±.36) among the possible score of 0∼5. 2. There was a significant relation between the intention of pregnancy and child rearing attitudes. It was mildly positive but was significant (r=.21, p＜0.05). 3. There was a significant relation between the period from marriage to the time of pregnancy and the intention or pregnancy(F=.57, p<0.05). Also, it was found out that the group of mothers who became pregnant later than 12 months after marriage wanted after pregnancy more than the group of women who were pregnant within 12 months after marriage(F=11.30, p<0.01). 4. There was a significant relation between the period from marriage to the time of pregnancy and child rearing attitudes(F=4.14, p<0.05), It showed that the child rearing attitudes of the group of women who became pregnant later than 12 months after marriage was positive(F=11.42, p<0.01). Also, in case that the both the husband and wife decided on the pregnancy, the child rearing attitudes were more positive (F=7.15, p< 0.05). In conclusion, when the intention of pregnancy was stronger, the subjects' child rearing attitudes were more positive. Also when both the husband and wife decided on the pregnancy, the attitudes were more positive. So it seems that both husband and wife should discuss and agree upon pregnancy, having a sufficient period during which both the spouses prepare for the intention of pregnancy. Additionally, it is suggested that when the husband and wife are doing family planning, it would be beneficial to use a program of 'Woman's Intention on Pregnancy' during this process.

• Journal of Sericultural and Entomological Science
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• v.13 no.2
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• pp.145-150
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• 1971

During 1968-1970, rearing method being held yearly through was conducted to find adequate rearing season under joint projects in various areas; Chung-nam area, Kyung-buk area, Chun-nam area. The results are summarized as follows: 1. In view of rearing results, earlier transfer represents better, in spring season while early transfer worst in autumn season. If the conventional transfer sets on critical point in autumn season, the value recorded gradually decreased in earlier and later transfer and rapidly in earlier and later. 2. With rearing season, obtained results are degraded in order of spring(1st-4th), autumn(7th-10th), late autumn(11th), summer(5th) , early autumn(6th). Late autumn transfer could be delayed for about 6-7 days in southern area. 3. With referrence to rearing results alone, it may be concluded that 4 time ordinary rearing is adoptable in multi-rearing method, dividing into 2 seasons which are 2 time spring rearing(1st-3rd) and 2 time autumn rearings(8th-10th).1st period of spring rearing should be done 3-4 days ahead of the conventional transfer dates being practiced in each local, and 2nd period of spring transfer 5-6 days delayed. In autumn transfer, 2-5 days ahead and 3-6 days delayed batches tested are preferable. In branch rearing, it is recommended that 4 time branch rearing is conducted to divide into 2 seasons which are 2 time spring rearing(1st-3rd) and 2 time autumn rearing (9th-11th) and that the former is carried out in the same level of the 2 time spring rearing, latter in the same level of the conventional autumn .earing (9th) , and late autumn rearing (11th).

• Korean Parent-Child Health Journal
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• v.14 no.1
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• pp.36-44
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• 2011

Purpose: This study was conducted to explore foreign immigrant mothers' experiences of pregnancy, childbirth, and child rearing. Methods: Ten married female migrants were selected by a purposive and snowball sampling method. Data were collected during the period from September to November, 2009 by individual in-depth interviews and all interviews were audio-taped and transcribed verbatim. Results: Ten categories were induced: In pregnancy and childbirth domain, social support-request help to their own parents, social support-depending on husband and mother's in law, Enduring emesis-gravidarum in strange environment were extracted. In Chid-rearing domain, child-rearing overburden, lack of self-confidence on maternal role, child-rearing difficulties due to language barrier, lack of information and education on child-rearing, lack of accessibility to public health care services, expectation of child's assimilation in Korea, financial strain in child-rearing. Conclusion: This study provides basic knowledge regarding married female migrants' experiences related to pregnancy, childbirth, and child rearing. The findings of the study will help health professionals designing effective interventions for married female migrants with difficulties related to child care, parenting, rearing.