• 한국동물번식학회:학술대회논문집
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• 한국동물번식학회 2001년도 춘계학술발표대회
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• pp.53-53
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• 2001

Two trials were conducted in a commercial dairy farm on heifer synchronization with PGF$_2$ $\alpha$. Animals showing estrus following the first injection were bred and animals not showing estrus were given the second injection 10 days later. In the first trial, the injection sites were rump and rump. In the second trial, the injection sites were rump and shoulder. Estrous detection was peformed 24 h after injection. Animals were bred by the same technician. In the first trial, the response rate for the first injection was 51.4% and the subsequent pregnancy rate of these animals was 60.0%. The response rate in the second injection was 57.1% and the pregnancy rate was 50.0%. In the second trial, the response rate in the first injection on the rump was 48.7% and the subsequent pregnancy rate was 70.6%. The second injection was given on the shoulder and the response rate was 60.0% and the subsequent pregnancy rate was 25.0%. The data suggests that the site of PGF2 $\alpha$ administration was critical to achieve success in estrous synchronization and pregnancy rates.

• 한국보육지원학회지
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• 제20권2호
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• pp.127-143
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• 2024

Objective: The purpose of this study is to develop a machine learning model to predict the subsequent childbirth intention of married women with one child, aiming to address the low birth rate problem in Korea, This will be achieved by utilizing data from the 2021 Family and Childbirth Survey conducted by the Korea Institute for Health and Social Affairs. Methods: A prediction model was developed using the Random Forest algorithm to predict the subsequent childbirth intention of married women with one child. This algorithm was chosen for its advantages in prediction and generalization, and its performance was evaluated. Results: The significance of variables influencing the Random Forest prediction model was confirmed. With the exception of the presence or absence of leave before and after childbirth, most variables contributed to predicting the intention to have subsequent childbirth. Notably, variables such as the mother's age, number of children planned at the time of marriage, average monthly household income, spouse's share of childcare burden, mother's weekday housework hours, and presence or absence of spouse's maternity leave emerged as relatively important predictors of subsequent childbirth intention.

• Asian Pacific Journal of Cancer Prevention
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• 제16권12호
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• pp.4977-4980
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• 2015

Background: ASC-US cases are managed according to the current American Society for Colposcopy and Cervical Pathology (ASCCP) guideline in which a human papillomavirus (HPV) test and repeat Pap smear are performed in the next 1 year. Colposcopy in cases of positive high risk HPV and persistent ASC-US or more in subsequent Pap smear is recommended. The HPV test is more expensive and still not currently a routine practice in Thailand. Objective: To identify the risk factors of persisted abnormal Pap smear and the colposcopic requirement rate in women with ASC-US. Materials and Methods: During 2008-2013, this study was conducted in Prapokklao Hospital, Chanthaburi, Thailand. Participants were women who attended gynaecology clinic for cervical cancer screening. Women who had cytological reports with ASC-US were recruited. During the study period, 503 cases were enrolled. Colposcopic requirement was defined as those who were detected with an ASC-US or more in subsequent Pap smears up to 1 year follow-up. Results: The colposcopic referral rate was 23.2 (85/365) percent at 12 months. Prevalence of cervical intraepithelial neoplasia (CIN) 2/3 was 3.3 (12/365) percent. Loss follow-up rate of subsequent Pap smear and colposcopic appointment were 27.4 (138/503) and 48.2 (41/85) percent, respectively. There was no invasive cancer. High risk factors for persisted abnormal Pap smears in subsequent test were premenopausal status, HIV infected patients and non-oral contraceptive pills (COC) users. Conclusions: Referral rate for colposcopy in women with ASC-US reports was rather high. Loss to follow-up rate was the major limitation. Immediate colposcopy should be offered for women who had high risk for silent CIN.

• 한국세라믹학회지
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• 제35권6호
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• pp.635-639
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• 1998

When the low pressure injection molded parts are debinded by wicking and subsequent thermal pyrolysis the optimum transition point from wicking to thermal pyrolysis is just after the completion of the constant wicking rate period. Even when the partially debinded parts were heated at 5$^{\circ}C$/min after reaching the 1st falling rate period the debinding defects such as distortion and cracks were not found.

• 디지털융복합연구
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• 제15권9호
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• pp.65-78
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• 2017

본 연구는 기혼여성의 자녀가치관과 추가출산의향의 관계에서 출산장려정책(보육료지원, 육아휴직제도)의 조절효과를 분석하는 것을 목적으로 하였다. 이를 위하여 "2015년 전국 출산력 및 가족 보건복지 실태조사"자료 중 총 2,143명의 자료를 선택하여 위계적 다중회귀분석과 조절회귀 분석방법을 적용하였다. 배경변수(교육수준, 소득, 연령, 기존 자녀 수)를 통제한 후, 위계적 다중회귀분석을 실시한 결과, 이상적 자녀수, 도구적 가치관과 정서적 가치관의 순으로 추가출산의향에 양(+)의 영향을 미치는 것으로 나타났다. 그리고 '육아휴직'은 추가출산의향에 유의한 영향이 없는 반면에, '보육료 지원'은 음(-)의 영향이 있는 것으로 나타났다. 또한 '보육료 지원'만이 '도구적, 정서적 가치관'과 추가출산의향의향의 관계에서 조절효과가 있는 것으로 나타났다. 이러한 결과는 효율적인 출산율 제고를 위해서는 무엇보다 자녀가치관을 높이기 위한 출산장려 문화정책이 필요하며, 아울러 추가출산 가능성이 높은 여성들을 대상으로 자녀수 등을 고려한 맞춤형 지원이 필요함을 시사한다.

• 한국가축번식학회지
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• 제26권1호
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• pp.69-72
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• 2002

PGF$_2$$\alpha$의 투여부위가 젖소의 발정동기화율 및 그에 따른 수태율에 미치는 영향을 구명하기 위하여 하와이주의 대규모 농장에서 사육중인 미경산 젖소에 대하여 25mg Dinoprost trometamine을 투여한 결과 다음과 같은 결과를 얻었다. 1. 둔부(근육주사)-둔부(근육주사) 처리에 있어서 첫 번째 처리된 35두 중 18두 (51.4%)가 발정이 발현되었고 그중 9두가 수태되어 60.0%의 수태율을 나타내었다. 첫 번째 처리후 발정을 나타내지 않은 개체들에 대하여 10일후에 다시 둔부에 PGF$_2$$\alpha$를 처리한 결과 14두중 8두(57.1%)가 발정이 유기 되었고 그중 4두가 수태 되어 50.0%의 수태율을 나타내었다. 2. 둔부(근육주사)-어깨부위(피하주사) 처리에 있어서 첫 번째 처리된 39두중 19두 (48.7%)가 발정이 발현되었고 그중 12두가 수태되어 70.6%의 수태율을 나타내었다. 첫 번째 처리후 발정을 나타내지 않은 개체들에 대하여 10일후에 에께부위에 PGF$_2$$\alpha$를 처리한 결과 20두중 12두(60.0%)가 발정이 유기 되 었고 그중 3두가 수태되어 25.0%의 수태율을 나타내었다. 3. 둔부 처리의 경우 점액이 유출된 27두중 18두(66.7%)가 수태로 이어졌고 점액이 유출되지 않은 13두중 5두에서 수태로 이어졌다 어깨처리의 경우에는 점액이 유출된 2두중 1두(50.0%)가 수태로 이어졌고 점액이 유출되지 않은 10두중 1두(10.0%)만이 수태로 이어졌다.

• Tribology and Lubricants
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• 제36권3호
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• pp.117-123
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• 2020

In this study, the effect of the pre-mild wear mode test condition on the subsequent severe wear behavior of carbon steel has been investigated when the wear mode is varied according to the sliding speed change during sliding contact. Two sliding speeds of 0.3 m/s and 3 m/s for the mild wear mode test have been chosen and a sliding speed of 1 m/s for the severe wear mode test. A mild wear mode test at two different sliding speeds has been carried out during the severe wear mode test and total sliding distance of the mild wear mode test has been changed at this time. As a result, it could be found that the wear rate of carbon steel under the severe wear mode test after performing a pre-mild wear mode test is significantly reduced, compared with that before performing. However, its wear rate was slightly higher than that under the mild wear mode test. Oxides produced during the pre-mild wear mode test have been found to play a significant role in reducing the wear rate under the subsequent severe wear mode test. In particular, it was found that the effect of a pre-mild wear mode test performed at the sliding speed of 3 m/s has more rapid and the reduction in the wear rate was greater than thst at the sliding speed of 0.3 m/s.

• 한국가정과교육학회지
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• 제27권4호
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• pp.155-172
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• 2015

본 연구는 어머니의 개인적 관계적 속성과 현 자녀속성이 후속출산계획에 미치는 영향과 어머니의 취업여부에 따라 후속출산계획을 예측하는 요인을 알아보기 위해 수행되었다. 본 연구대상은 한국아동패널조사에 참여한 어머니 1,635명이었으며, 조사도구는 어머니의 월평균 가구소득, 양육스트레스, 자녀가치, 결혼만족도, 사회적 지원, 기존 자녀의 출생순위와 성별을 측정하기 위한 자기기입식 설문지이었다. 수집된 자료는 SPSS 22.0 프로그램을 사용하여 기술통계와 t 검증 및 ${\chi}^2$ 검증, 의사결정나무분석을 통해 분석되었다. 본 연구의 주요결과는 다음과 같다. 첫째, 어머니의 양육스트레스, 자녀가치, 결혼만족도, 사회적 지원, 자녀의 출생순위와 성별은 후속 출산계획에 영향을 미친 반면 월평균 가구소득은 영향을 미치지 않는 것으로 나타났다. 둘째, 비취업모의 경우 자녀의 출생순위와 성별, 자녀가치가 후속출산계획을 예측하는 주요인으로 제시되었는데, 현 자녀가 첫째이면서 여아일 경우 후속출산계획을 수립할 가능성이 가장 높았으며, 자녀가 첫째이면서 남아일 경우 자녀에 가치를 부여하는 정도가 높을수록 후속출산계획을 수립하는 것으로 나타났다. 취업모의 경우 자녀의 출생순위와 결혼만족도가 후속출산계획을 가장 잘 예측하는 요인으로 나타났으며, 현 자녀가 첫째이면서 결혼만족도가 높을 경우 후속출산계획을 수립할 가능성이 높았다. 마지막으로, 후속출산율 제고방안으로, 인구교육의 필요성과 가정교과의 역할을 제안하였다.

• Archives of Plastic Surgery
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• 제44권6호
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• pp.523-529
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• 2017

Background Serial tissue expansion is performed to remove giant congenital melanocytic nevi. However, there have been no studies comparing the expansion rate between the subsequent and preceding expansions. In this study, we analyzed the rate of expansion in accordance with the number of surgeries, expander location, expander size, and sex. Methods A retrospective analysis was performed in pediatric patients who underwent tissue expansion for giant congenital melanocytic nevi. We tested four factors that may influence the expansion rate: The number of surgeries, expander location, expander size, and sex. The rate of expansion was calculated by dividing the 'inflation amount' by the 'expander size'. Results The expansion rate, compared with the first-time group, was 1.25 times higher in the second-or-more group (P=0.04) and 1.84 times higher in the third-or-more group (P<0.01). The expansion rate was higher at the trunk than at other sites (P<0.01). There was a tendency of lower expansion rate for larger expanders (P=0.03). Sex did not affect the expansion rate. Conclusions There was a positive correlation between the number of surgeries and the expansion rate, a positive correlation between the expander location and the expansion rate, and a negative correlation between the expander size and the expansion rate.

• Asian-Australasian Journal of Animal Sciences
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• 제14권12호
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• pp.1675-1677
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• 2001

The effect of the presence or absence of corpus luteum in the ovaries of slaughtered buffaloes was studied for the oocytes recovery and their subsequent maturation and fertilization in vitro. On an average, 0.41 and 0.67 oocytes per ovary were recovered from ovaries with and without corpus luteum, respectively. Immature oocytes were matured in TCM-199 medium. Significant difference was observed in maturation rate between good (74%) and fair (37%) oocytes. However, there was no significant difference in cleavage rate between the two types. The results of this study show that although the presence of corpus luteum in the ovary at the time of recovery significantly affected availability of total oocytes and in-vitro maturation, but fertilization and cleavage remained unaffected under in vitro conditions.