• Journal of Embryo Transfer
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• v.23 no.4
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• pp.257-261
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• 2008

The objective of present study was to investigate the effect of seasons on reproductive performance of Hanwoo and Holstein heifers. Heat stress in summer or cold stress in winter stress to Hanwoo and Holstein heifers may bring reproduction failure, which would pose an important economic loss, even around Daegwallyeong region located in high mountainous area. Seasonal differences in the serum levels of LH, FSH and progesterone ($P_4$) in response to environmental factors (hot and cold) out of 20 pubertal Hanwoo heifers in Daegwallyeong, Gangwon Province and 20 non-lactating Holstein heifers in Chonan city of Republic of Korea at 2-3 years of age were compared. Blood samples for hormonal analysis were from jugular vein after detection of estrus repeatedly over four seasons within four-week intervals (Spring: May to June, Summer: July to August, Autumn: October to November and Winter: January to February). In Hanwoo heifer population, averages of LH and FSH concentration in spring and in summer were greater compared to those in winter (p<0.05). LH or FSH levels tended to be greater (p=0.06) in spring and less (p=0.09) in winter compared to the levels in autumn. Only in summer, cattle seemed to show lower LH or FSH secretion (p<0.05). Similar to the results in Hanwoo heifers, the serum concentrations of LH and FSH in Holstein heifers decreased further by heat stress in summer when P 4 levels were high during luteal phase. The results demonstrate significant effect of summer heat on reproduction of Hanwoo or Holstein heifers. Although parameters indicating the extent of heat stress were not measured in this study, we suggest that serum hormone levels could be considered as successful indicators of summer heat stress condition for Hanwoo and Holstein heifers even under rather cool summer climate.

• Korean Journal of Adult Nursing
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• v.19 no.3
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• pp.353-364
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• 2007

Purpose: The purpose of this study was to investigate the effects of health promotion program on physiological stress, perceived stress and menopausal symptoms in menopausal women. Methods: This study followed a nonequivalent control group pretest-post test design. The subjects consisted of 57 middle-aged women(30 in the experimental group and 27 in the control group) who were recruited from the community health center in J city. The subjects in the experimental group participated in a health promotion program for 8 weeks, which was composed of yoga and teaching for 1 session per week. Results: The health promotion program showed a statistical difference in blood pressure, pulse rate and perceived stress. However, there was not a statistical difference in serum cortisol, or menopausal symptoms. Conclusion: This health promotion program was partially effective for reducing stress and it was not effective for reducing menopausal symptoms in menopausal women. It is necessary to conduct a future study using a different time period, measurement time, and target population.

• Journal of Korean Public Health Nursing
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• v.22 no.2
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• pp.255-265
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• 2008

Purpose: The principal objective of this study was to assess the topics and research methods of smoking-related research and to suggest future research directions. Methods: The subjects of this study were smoking research articles supported by the National Health Promotion Funds from 1998 to 2007. A total of 41 articles were selected and analyzed from 1999 to 2005 using the frameworks such as topics, subjects contents, subjects, research field, and research design. Results: The most frequent topic of smoking-related research was the development & evaluation of educational programs for smoking prevention and smoking cessation (34.1%). The majority of the research subjects were adults (42.2%) and adolescents (35.9%). 31.7% of the total research researches was conducted at the nationwide population level. The most popular research design was the descriptive study (36.6%) in the non-experimental studies and nonequivalent control group pretest-posttest design(19.5%) in the experimental study studies. Conclusion: The topics of smoking research should be planned under governmental strategies for decreasing to a 30% reduction in of smoking rates, as established in the 2010 Health Plan. With regard to the methodological aspects, longitudinal and nationwide research was first required so that we could plan an evidence-based program for smoking prevention and smoking cessation.

• Women's Health Nursing
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• v.19 no.3
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• pp.129-141
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• 2013

Purpose: The purpose of this study was to determine the current state of nursing intervention for maternal adaptation and its' effectiveness in Korea by utilizing a systematic review. Methods: The PICO(Population-Intervention-Compar ator-Outcome) strategy was established, and 1,720 pieces of literature published during the last ten-year period from four electronic databases were reviewed. Eighteen references that met inclusion and exclusion criteria were finally selected for systematic review. The quality of references using critical appraisal checklist for experimental studies were evaluated, and then systematic review and meta-analysis were conducted. Results: All 18 references were quasi-experimental research design. Most interventions were provided at the hospital and postpartum care center. Maternal adaptation interventions appeared to be of many types, and particularly maternal role education programs were the most common. Confidence in maternal role was used as the most common variable for the maternal adaptati on. Various interventions for helping maternal adaptation in the postnatal period improved maternal confidence, moth er-infant attachment, maternal satisfaction and mother-infant interaction effectively. Conclusion: A diversity of nursin g interventions in postnatal period improved various aspects of maternal adaptation. Randomized controlled trials and longitudinal studies are needed in order to verify the effect of interventions for maternal adaptation more clearly.

• Asian-Australasian Journal of Animal Sciences
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• v.20 no.6
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• pp.908-913
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• 2007

Concentrations of major elements in forages were determined in relation to ruminant requirements at a livestock experimental station in Leiah district, Punjab-Pakistan using mapping techniques. The study investigated the influence of sampling periods and pasture types on the concentrations of calcium, magnesium, potassium, and sodium in forages. The implications of these forages for nutrition of ruminants were assessed for the livestock population at that particular experimental station, which are supported by the farm pastures. Within the farm, variations in the element status of the forages were related to soil pasture types. A tentative assessment of the mineral status of available forages at this farm for different pastures using guidelines developed for domestic animals indicated deficiencies of only Na, but forages contained adequate Ca, Mg, and K levels required for grazing ruminants. The concentrations of Na in the forage reserves indicated that the potential supply of this element to plants was limited from the soil to plants and from plants to the animals grazing them. Soil minerals were not measured in this study. The potential use of fertilizers, as pasture amendment as well as supplementation of ruminants, with a specifically tailored mineral mixture is important to livestock producers and environmentalists as well, because their use may improve forage nutritive value and in turn meet requirements of animals.

• Child Health Nursing Research
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• v.14 no.4
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• pp.352-360
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• 2008

Purpose: The purpose of this study was to investigate the effects of an education program on health promotion behavior for students with hearing impairments. Method: For this study a nonequivalent control group pretest-posttest design was used. The three components of the study were: 1) the recognition of the importance of health promotion behavior, 2) formation of supportive networks, and 3) practice of health promotion behavior. The study population consisted of 38 students with hearing impairments (experimental group [19], control group [19]). The program was provided to students in the experimental group for 50-120 minutes, once a week for 3 weeks. Descriptive statistics, $X^2$-test, t-test, Fisher's exact test, and ANCOVA were used to analyze the data. Results: Perceived social support and health promotion behavior, but not self efficacy, were significantly different between the two groups. Conclusion: The result of this study indicate that this education program for health promotion behavior was effective for promoting perceived social support and health promotion behavior in students with hearing impairments, but further continuous research is needed to identify effective interventions to promote health behavior in students with hearing impairments and to allow for generalization of the results of this study.

• Korean Parent-Child Health Journal
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• v.16 no.1
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• pp.37-44
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• 2013

Purpose: The purpose of this study is to analyze the effectiveness of maternity nursing education-knowledge, skills and attitude among the third year students who have completed maternity nursing, practice at the college, clinical practice and core skill practicum. Methods: This is the descriptive research to verify the effectiveness of simulation-based practice education for core skill of maternity nursing. Third year nursing students who have completed maternity nursing related theories and practice have been selected as population. Total of 202 surveys have been used for analysis. Data analysis is done by using SPSS/WIN 18.0. Results: Self-confidence of core skill in maternity nursing is experimental group 4.52 and control group 4.37 score (p<.05). Performance competence in childbirth care is experimental group 4.53 and control group 4.35 score (p<.05). The students who have maternity nursing related clinical practice and core skill practicum experience show high core skill evaluation score. Conclusion: Therefore, it is recommended that current maternity nursing core skill curriculum should be reviewed and improved, and the students should be provided variety of simulation techniques to gain essential knowledge and core nursing skills.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.16 no.6
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• pp.119-133
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• 2013

The purpose of this study is to develop riverbed techniques to activating ecological function of hyporheic zone. Hyporheic zone maybe simply defined as an active eco-tone between surface water and groundwater, which facilitates to exchange water, nutrients and aquatic habitat occur in response to variation in discharge and bed geomorphology. The aim of this study is to evaluate the effectiveness of an applied riverbed technique for two years since its installation in the hyporheic zone. The experimental riverbed technique has been implemented on Anyang stream penetrating Anyang city in Gyunggi province. The dimension of the installed structure is 5.0 m in width, 46 m in length. Bottom layer is filled with rip-rap covered with gabion. After the implementation of the technique, the study conducts follow-up monitoring in two years of between 2011 and 2012. The results of follow-up monitoring for two years are as follows:1) In Hydro geomorphic process, the riverbed technique maintains hydraulic stability despite of several flood events in 2011, 2012. 2) After transformation to form pool-and-riffle habitat, for aquatic community composed of freshwater fish, macro invertebrate, and attached algae, the species diversity and population gradually increased. 3) The riverbed technique achieved desired effect on enhancement of ecological function in hyporheic zone.

• Journal of Korean Society for Atmospheric Environment
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• v.14 no.3
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• pp.177-190
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• 1998

The concentrations of air pollutants In large cities such as Pusan area have been increased every year due to the increasing of fuels consumption at factories and by vehicles as well as the gravitation of the population. In addition to the pollution sources, time and spatial variation of air pollutants concentration and meteorological factors have a great influence on the air pollution problem. Especially , its concentration is governed by wind direction, wind speed, precipitation, solar radiation, temperature, humidity and cloud amounts, etc. In this study, we have analyzed various data of meteorological factors using typical patterns of the air pressure to investigate how the concentration of air pollutants is varied with meteorological condition. Using the relationship between meteorological factors (air temperature, relative humidity, wind speed and solar radiation) and the concentration of air pollutants (SO2, O3) , experimental prediction formulas for their concentration were obtained. Therefore, these prediction formulas at each meteorological factor in a pressure pattern may be roughly used to predict the air pollutants concentration and contributed to estimate the variation of its value according to the weather condition in Pusan city.

• Transactions of the Korean Society of Mechanical Engineers
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• v.14 no.5
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• pp.1211-1221
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• 1990

The purpose of this study is to get experimental data on the distribution of CWM (Coal- Water Mixture) droplets size and the presence of pulverized coal particles inside CWM droplets. Atomization of CWM is done by Twin-Fluid Atomizer. The operational parameters are atomizing air pressure, coal particle loading, mean size of pulverized coal particles and sampling positions across spray. Th data analysis is initiated by Impression Sampling Method(Magnesium Oxide Technique) and Photo-technique and counting works are followed. Experimental work induces following research results. The variation of particle loadings in slurry makes no appreciable effects on the mean size of CWM droplets. It is evident that atomizing air pressure has very strong effect on the atomization of slurry. The mean size of atomized fuel droplets is dramatically reduced with the increasing air pressure. The population ratio of droplets without coal particles to total number of droplets is decreased as atomizing air pressure or loading rises and the same trend is obtained as the mean size of coal particles becomes smaller but a certain tendency of coal particle presence inside droplets could not be found from the change of sampling positions.