• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.21 no.1
• /
• pp.338-348
• /
• 2020

This study examined the longitudinal relationship between paternal depressive symptoms and maternal depressive symptoms simultaneously. This study also identified the interplay of paternal and maternal depressive symptoms for predicting elementary children's language development, their problem behaviors and their school adjustment. Using the data from the Panel Study on Korean Children for the 4th-8th years (2011~2015 year), this study used the Latent Growth Curve Model, which is helpful for examining longitudinal relationship differences among variables. The sample subjects were 1,754 parents and children. The results are as follows. The initial level of paternal depressive symptoms had a positive impact on the rate of change in maternal depressive symptoms. The initial level of maternal depressive symptoms had a negative impact on the rate of change in maternal depressive symptoms. Mothers' depressive symptoms showed not only the mothers' own depression problem. but also the self-effect and counterpart effect of depression on the fathers' depression problem. The rate of change in maternal depressive symptom mediated the relation between the initial level of parental depressive symptoms and children's receptive language, internalizing/externalizing problems, and school adjustment. Therefore, depression prevention and intervention programs for both fathers and mothers are needed for the healthy development and school adaptation of school-age children.

• Korean Journal of Poultry Science
• /
• v.7 no.1
• /
• pp.31-42
• /
• 1980

In order to identify the best superior cross combination of breeder stocks for broiler production, combining ability test and analyses of phenotypic performances for parent stocks were examined on records of 1,440 broiler chicken which were produced from 4 parental strains and 3 maternal strains at Hanhyup Poultry Breeding Farm from September 28, 1978 to January 5, 1979. The results obtained were as follows; 1. There was not found heterosis effect in viability but it seems to be desirable to select Hubbard strain in paternal line to improve viability. 2. As the paternal and maternal lines, selection of Ross strain showed the best paternal and maternal performance and the best general combining ability in body weight at 8 weeks of age is expected to be able to improve body weight of it s crossbred And the most superior cross combinations based on the specific combining ability and performance of rack crossbred were identified as Hubbard x Ross ana Ross x Hypeco crossbreds. 3. The best paternal and maternal lines on the smallest feed consumption for 8 weeks were Hubbard and Ross strains, and Hypeco strain, respectively. Especially Hubbard x Hypeco cross combination was proved as the smallest feed consumption compared with other cross combinations. 4. In feed requirement per Kg body weight increase, Hubbard strain for paternal line, Hypeco strain for naternal line, and cross combinations of Hubbard x Hypeco, Hubbard x Ross and Ross x Hypeco were certified as the most superiors. 5. Also superior cross combinations of Hubbard x Hypeco and Hubbard x Ross earned the most profit per bird through economic analysis. According to results as shown above, this experiment seems to be able to reach a such conclusion that production of superior cross combinations Hubbard x Ross, Hubbard x Hypeco and Ross x Hypeco through selection of Ross and Hubbard strains to paternal line and Hypeco and Ross strains for maternal line may become to considerable improvement for important economic characters of broiler; viability, body weight, feed consumption and feed requirement.

• Human Ecology Research
• /
• v.55 no.1
• /
• pp.81-92
• /
• 2017

Father participation in child rearing is gaining its importance in the field of child development. Previous literature consistently suggests the importance of parental efficacy and educational support on children's school life. However, studies which that focus exclusively on the role of the father's role are highly limited. Based on previous literature, we hypothesized that parental efficacy would directly and indirectly affect children's school life via parental educational support at home. We aimed to expand on the previous literature by exploring the relations within fathers. Participants were 662 fathers whose children attended elementary, middle, and high school. We measured parental efficacy, educational support at home, and their children's school life were measured. Descriptive statistics were first conducted to investigate the general features of participants as well as the correlations between study variables. The research model was analyzed using structural equation modeling in AMOS 20.0. Results proved the direct effect of father's parental efficacy on father's educational support at home as well as children's school life. Fathers' educational support at home mediated the effect of parental efficacy on children's school life. Our results suggests that fathers who perceive themselves as efficient parents provides a higher level of educational support at home for their children; consequently, children of those fathers in turn adjust better in school and achieve higher grades. Also, the father's parental efficacy also indirectly exerts positive effects on children's school life via heightened educational support at home. An importance of paternal participation and support in child rearing and education was highly suggested. Relevant policy issues regarding paternal educational support were discussed.

• Asian-Australasian Journal of Animal Sciences
• /
• v.20 no.12
• /
• pp.1805-1811
• /
• 2007

A simulation study was conducted to evaluate the effect of reciprocal cross on the detection and characterization of parent-of-origin (POE) QTL in $F_2$ QTL populations. Data were simulated under two different mating designs. In the one-way cross design, six $F_0$ grand sires of one breed and 30 $F_0$ grand dams of another breed generated 10 $F_1$ offspring per dam. Sixteen $F_1$ sires and 64 $F_1$ dams were randomly chosen to produce a total of 640 $F_2$ offspring. In the reciprocal design, three $F_0$ grand sires of A breed and 15 $F_0$ grand dams of B breed were mated to generate 10 $F_1$ offspring per dam. Eight $F_1$ sires and 32 $F_1$ dams were randomly chosen to produce 10 $F_2$ offspring per $F_1$ dam, totaling 320 $F_2$ offspring. Another mating set comprised three $F_0$ grand sires of B breed and 15 $F_0$ grand dams of A breed to produce the same number of $F_1$ and $F_2$ offspring. A chromosome of 100 cM was simulated with large, medium or small QTL with fixed or different allele frequencies in parental breeds. A series of tests between Mendelian and POE models were applied to characterize QTL as Mendelian, paternal, maternal or partial expression QTL. The overall detection powers were similar between the two mating designs. However, the proportions of paternally expressed QTL that were declared as paternal QTL type were greater in the reciprocal cross design than in the one-way cross, and vice versa for Mendelian QTL. When QTL alleles were segregating in parental breeds, a significant proportion of Mendelian QTL were spuriously declared POE QTL, suggesting that care must be taken to characterize imprinting QTL in a QTL mapping population with a small number of $F_1$ parents.

• Toxicological Research
• /
• v.20 no.2
• /
• pp.131-136
• /
• 2004

3-Monochloro-1,2-propanediol(3-MCPD) is a toxic compound, often present in different foods containing acid hydrolyzed(AH) protein, like seasonings and savory food products. The purpose of the present study was to investigate the effects of 3-MCPD on male fertility, sperm and testosterone secretion. In vivo male fertility test was performed for observing the adverse effects of 3-MCPD on the function of male reproductive system and pregnancy outcome. 0.01, 0.05, 0.25, 1 and 5 mg/kg b.w. of 3-MCPD was given daily by gavage to groups of 15 adult male SD rats for 4 weeks. At the end of pre-treatment period, males were mated overnight with normal females. Following morning, males demonstrating successful induction of pregnancy were sacrificed on that day to assess sperm parameters and histopathology of reproductive organs. The resulting pregnant females were sacrificed on day 20 of gestation to evaluate pregnancy outcome. As a result, four-week paternal administration with 3-MCPD resulted in adverse effects on male fertility and pregnancy outcome without remarkable histopathological changes in testes and epididymides; sperm motility, copulation index and fertility index were markedly decreased in the treated group and numbers of live fetuses showed steep dose-response curves. Also, spermatogenesis was investigated in this experiment. However, no effect was observed on production of sperm in testes treated with 3-MCPD for 4 weeks. Hormone assay was performed for observing the effects of 3-MCPD on testosterone and luteinizing hormone (LH) in blood and testes of male SD rats and cultured primary Leydig cell. In result, significant changes of related hormones did not observed by treatment of 3-MCPD. These results indicated that paternal treatment with 3-MCPD induced spermatotoxic effect, which caused an antifertility on male.

• Journal of Families and Better Life
• /
• v.32 no.2
• /
• pp.77-97
• /
• 2014

The purpose of this study was to examine 1) the relations among parent-reported, teacher-reported, and task-observed effortful control, and 2) the differences of preschoolers' effortful control based on preschoolers' gender and parenting behaviors (affectionate, controlled). In this study, the subjects were 221 preschoolers (104 boys, 117 girls) and their parents. The preschoolers' effortful controls was measured by Effortful Control Battery (Snack Delay, Turtle and Rabbit, and Red-Green Sign) and the Children's Behavior Questionnaire-Short Form. Parenting behavior was measured by the Parenting Style scale. The major results of this study were as follows. First, there were positive correlations between parent-reported effortful control and both teacher-reported and task-observed effortful control. Second, there were significant differences in preschoolers' effortful control by gender and level of affectionate parenting behavior. And there was an interaction effect between gender and level of affectionate parenting behavior on preschoolers' effortful control. The implications of this study were as follows. It is needed to evaluate effortful control in various circumstances and by multiple raters, and affectionate parenting behavior had an important role upon boys' effortful control rather than that of girls.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
• /
• v.13 no.5
• /
• pp.119-129
• /
• 2018

Today, many organizations, including venture companies, are focusing on attention on securing and attracting talented people, and on the job satisfaction of their members. However, many organizations, including venture companies, lack understanding of work-family interaction. This study was conducted to investigate the interactions between work and family. Specifically, this study aims to verify the mediating effects of paternal involvement in child care, specifically effects on influences of autonomy at work over satisfaction at work for Dual-income married man living in Gyungbuk province, whose spouse is also working. In order to achieve the aim, I conducted survey from August 29 to September 22 in 2014, targeting married man living in Gyungbuk province, and collected data were analysed using SPSS 20.0. Characteristics of each factors were analysed through frequency and descriptive statistic analysis, and correlation, causal relation, and mediating effects of factors were analysed through correlation analysis and hierarchial analysis. The summary of this study is as follows. First, satisfaction at work for married man showed positive relations with all the sub factors of autonomy at work and paternal involvement, which are housekeeping activities, cognitive fulfillment counselling, life style counselling, and leisure activity participation. Second, satisfaction at work for married man appears to be affected by autonomy at work, life style counselling, leisure activity participation, monthly income, and occupation. Also, in relationship between autonomy at work and satisfaction at work, life style counselling and leisure activity participation, that are sub factors of paternal involvement, appeared to be partially mediating. Therefore, in order to improve the job satisfaction of men, it is necessary not only to increase job autonomy, but also to improve the job satisfaction by preparing ways to parenting involvement.

• Korean Journal of Child Studies
• /
• v.35 no.2
• /
• pp.63-84
• /
• 2014

The purpose of this study was to explore the effects of parental differential treatment and social support perceived by adolescents with siblings with special needs on their self-esteem and internalized problems. The subjects comprised one hundred 12- to 18-year-old adolescents with siblings with special needs. The major results of this study were as follows. First, there were significant differences in adolescents' self-esteem by participation in support programs for siblings of children with special needs. Second, there was no significant effect of parental differential treatment on adolescents' self-esteem. Third, there was a significant effect of social support (family, friends, and teachers) on adolescents' self-esteem. Fourth, there was no effects of paternal differential parenting on adolescents' internalized problems. However, there was a significant effect of differential maternal affection on adolescents' internalized problems. Fifth, there was a significant effect of social support, especially in terms of support provided by friends, on adolescents' internalized problems. In conclusion, social support and differential maternal affection both have an important role in adolescents' self-esteem and internalized problems.

• Proceedings of the KIEE Conference
• /
• 2007.04c
• /
• pp.159-161
• /
• 2007

$CO_2$ laser sees that is most suitable to get this effect through minimum formation damage and advantage that is root enemy of effect that happen in minimum cellular tissue depth of 0.1mm is stable living body organization or internal organs institution. Formation damage by ten can be related in formation's kind or energy density, length of evaporation time. If shorten evaporation time, surroundings cellular thermal damage 200 - because happen within 400ums laser beam in rain focus sacred ground surroundings cellular tissue without vitiation me by evaporation Poe of very small floor as is clean steam can. Application is possible to vulva cuticle cousins by a paternal aunt quantity, uterine cancer, cuticle tumor by laser system that $CO_2$ laser gets into standard in obstetrics and gynecology application. Because effect that super pulse output is ten enemies of laser if uniformity one pulse durations are short almost is decreased, most of all pulse module special quality of pulse style $CO_2$ laser for obstetrics and gynecology mode stabilization by weight very, in this research to get into short pulse duration and higher frequency density, do switching by high frequency in DC-DC Converter output DC's ripple high frequency to be changed, high frequency done current ripple amount of condenser for output filter greatly reduce can. Ripple of output approximately to Zero realization applying possible inductor realization through a special quality experiment do.

• Proceedings of the KIEE Conference
• /
• 2007.04a
• /
• pp.55-57
• /
• 2007

$CO_2$ laser sees that is most suitable to get this effect through minimum formation damage and advantage that is root enemy of effect that happen in minimum cellular tissue depth of 0.1mm is stable living body organization or internal organs institution. Formation damage by ten can be related in formation's kind or energy density, length of evaporation time. If shorten evaporation time, surroundings cellular thermal damage 200 - because happen within 400ums laser beam in rain focus sacred ground surroundings cellular, tissue without vitiation me by evaporation Poe of very small floor as is clean steam can. Application is possible to vulva cuticle cousins by a paternal aunt quantity, uterine cancer, cuticle tumor by laser system that $CO_2$ laser gets into standard in obstetrics and gynecology application. Because effect that super pulse output is ten enemies of laser if uniformity one pulse durations are short almost is decreased, most of all pulse module special quality of pulse style $CO_2$ laser for obstetrics and gynecology mode stabilization by weight very, in this research to get into short pulse duration and higher frequency density, do switching by high frequency in DC-DC Converter output DC's ripple high frequency to be changed, high frequency done current ripple amount of condenser for output filter greatly reduce can. Ripple of output approximately to Zero realization applying possible inductor realization through a special quality experiment do.