• Journal of the Korean Geographical Society
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• v.50 no.1
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• pp.23-36
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• 2015

The temperature change patterns of climatic solar terms and their climatic fitness were analyzed. Harmonic analysis based on thirty-year(1981-2010) time-series data from sixty one weather stations across South Korea showed that the central peaks of the extreme heat had shifted toward start of autumn with increasing mean temperature. The overall climatic fitness of solar terms, such as major heat, frost descent, major snow, and major cold, was low, and it showed significant regional variations. The actual meteorological phenomenon representing each climatic solar term was observed much later than the day of the solar term at most weather stations. The number of observations, where an actual meteorological condition for each climatic solar term was recorded within ${\pm}1$ week from the day of that solar term, ranged only from 7.7% to 40.4% of the entire data. Study results also showed that the climatic fitness of major heat, frost descent, and major snow gradually changed in the east-west direction. Major cold, a solar term with higher climatic fitness, was influenced more strongly by latitude than longitude. Considering geographically uneven magnitude and trends in temperature changes, rearrangement and adjustment of time intervals between the solar terms may help us improve their applicability as realistic indicators of seasonal changes.

• Journal of the Korean Geographical Society
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• v.47 no.2
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• pp.208-225
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• 2012

The spatial characteristics of changes in extreme temperature indices for 2070-2099 relative to 1971-2000 in the Republic of Korea were investigated using daily maximum (Tmax) and minimum (Tmin) temperature data from a regional climate model (HadGEM3-RA) based on the IPCC RCP4.5/8.5 at 12.5km grid spacing and observations. Six temperature-based indices were selected to consider the frequency and intensity of extreme temperature events. For validation during the reference period (1971-2000), the simulated Tmax and Tmin distributions reasonably reproduce annual and seasonal characteristics not only for the relative probability but also the variation range. In the future (2070-2099), the occurrence of summer days (SD) and tropical nights (TR) is projected to be more frequent in the entire region while the occurrence of ice days (ID) and frost days (FD) is likely to decrease. The increase of averaged Tmax above 95th percentile (TX95) and Tmin below 5th percentile (TN5) is also projected. These changes are more pronounced under RCP8.5 scenario than RCP4.5. The changes in extreme temperature indices except for FD show significant correlations with altitude, and the changes in ID, TR, and TN5 also show significant correlations with latitude. The mountainous regions are projected to be more influenced by an increase of low extreme temperature than low altitude while the southern coast is likely to be more influenced by an increase of tropical nights.

• Journal of Bio-Environment Control
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• v.25 no.4
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• pp.308-319
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• 2016

In order to set the outdoor weather conditions to be applied to the design standard of the greenhouse heating and cooling system, outdoor air temperature and heating degree-hour for heating design, dry bulb temperature, wet bulb temperature and solar irradiance for cooling design were analyzed and presented. For every region in Korea, we used thirty years from 1981 to 2010 hourly weather data for analysis, which is the current standard of climatological normal provided by KMA. Since the use of standard weather data is limited, design weather conditions were obtained using the entire weather data for 30 years, and the average value of the entire data period was presented as a design standard. The design weather data with exceedance probability of 1, 2.5, and 5% were analyzed by the TAC method, and we presented the distribution map with exceedance probability of 1% for heating and 2.5% for cooling which are recommended by design standards. The changes of maximum heating load, seasonal heating load and maximum cooling load were examined by regions, exceedance probabilities, and setpoint temperatures. The proposed outdoor design conditions can be used not only directly for the greenhouse heating and cooling design, but also for the reinforcement of heating and cooling facilities and the establishment of energy saving measures. Recently, due to the climate change, sweltering heat in summer and abnormal temperature in winter are occurring frequently, so we need to analyze weather data periodically and revise the design standard at least every 10 years cycle.

• The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY
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• v.3 no.1
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• pp.16-24
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• 1998

In this study, Ocean General Circulation Model (OGCM) has been developed as a counterpart of Atmospheric General Circulation (AGCM) for the study of coupled ocean-atmosphere climate system. The oceanic responses to given atmospheric boundary conditions have been investigated using the OGCM. In an integration carried out over 100 simulated years with climatological monthly mean data (EXP 1), most parts of the model reached a quasi-equilibrium climate reproducing many of the observed large-scale oceanic features remarkably well. Some observed narrow currents, however, such as North Equatorial Counter Current, were inevitably distorted due to the model's relatively coarse resolution. The seasonal changes in sea ice cover over the southern oceans around Antarctica were also simulated. In an experiment (EXP 2) under boundary condition of 10-year monthly data (1982-1991) from NCEP/NCAR Reanalysis Project model properly reproduced major oceanic changes during the period, including El Ni$\tilde{n}$os of 1982-1983 and 1986-87. During the ENSO periods, the experiment showed eastward expansion of warm surface waters and a negative vertical velocity anomalies along' the equator in response to expansion of westerly current velocity anomalies as westerly wind anomalies propagated eastward. Simulated anomalous distribution and the time behavior in response to El Ni$\tilde{n}$o events is consistent with that of the observations. These experiments showed that the model has an ability to reproduce major mean and anomalous oceanic features and can be effectively used for the study of ocean-atmosphere coupling system.

• Asian Journal of Turfgrass Science
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• v.23 no.1
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• pp.91-100
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• 2009

In regional nutrient quota system, livestock manure was applied as liquid fertilizer after slurry composting and biofiltration (SCB) process. This study was conducted to evaluate the effect of SCB liquid fertilizer on turfgrass growth in golf course during 6 month period from May to October in 2008. Fertilizer treatment was designed as follows; non-fertilizer (NF), control (CF; compound fertilizer), S-1 (1L SCB${\cdot}m^{-2}$) and S-2 (2L SCB${\cdot}m^{-2}$). Every treatment was arranged in a randomized complete block design with three replications. In creeping bentgrass, turf color index, chlorophyll content, and dry weight were measured. Results were as follows; A seasonal change pattern of turf grass quality in all treatment increased in April $\sim$ June and September $\sim$ October, whereas it decreased in July $\sim$ August. As compared with NF, turf color index of CF, S-1 and S-2 increased by 1.8%, 1.8%, and 3.3%, respectively and chlorophyll content by 13%, 14%, and 20%, respectively. Dry weight of CF, S-1, and S-2 was higher than that of NFl by 7.7%, 18.2%, and 18.1%, respectively. For turf color index, chlorophyll content, and dry weigh, S-2 showed the best effect, followed by S-1 and CF in creeping bentgrass. These results indicated that the SCB application improves turf growth and quality.

• Korean Journal of Ichthyology
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• v.7 no.2
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• pp.187-194
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• 1995

This study was carried out to obtain fundamental data on the metabolism of hibernant fish loach, Misgurnus mizolepis. Main focus was on the compositon of muscle components and its changes in fresh - water loach before and after spawning season and before and after hibernation. Distributional changes of carbohydrate, protein and lipid in the muscle tissues were also investigated. Change patterns of miosture and crude protein, and moisture and crude lipid were in inversely proportional, i.e. : moisture amount showed the lowest value after spawnig season, the highest just after hibernation, but crude protein and crude lipid were the highest values after spawning season, and the lowest just after hibernation. Carbohydrate showed the highest value just before hibernation and tended to decrease thereafter. Muco layer of epidermis and muscle cell of hypodermis layer in loach were remarkable in its PAS dyeing degree after sapwning season, and it was presumed to include high percentage of protein or carbohydrate. Dermis layer became thinner before spawning hibernation. Lipid component in female tended to distribute relatively widely in the muscle cell layer before spawning season, but in case of male mainly in muco layer and epidermis layer. It appeared that lipid was spreaded mainly in epidermis and hypodermis tissue after spawning season, while it prevailed in almost all tissues but tended to decrease after hibernation.

• Journal of Digital Convergence
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• v.12 no.2
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• pp.409-415
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• 2014

This study was done to identify the relationships between nursing practice stress and stress coping for the nursing students in Korea. Data were collected at 2 universities located in C city in Korea. Participants were 160 nursing students. Data were analyzed by SPSS 18.0 using descriptive statistics and Pearson's correlation coefficient. Nursing practice stress was $2.72{\pm}6.2$. Stress coping was $2.60{\pm}0.37$. Stress was correlated with wishful thinking coping strategy when doing orientation (r=0.32, p<0.01), conference(r=0.52, p<0.01), homework(r=0.29, p<0.01). Stress for practice exam was correlated with problem focused coping strategy(r=0.31, p<0.05). Stress was correlated with positive view coping strategy when face nurse(r=0.31, p<0.01) or interpersonal relations(r=0.35, p<0.01). Stress related to practice environment and class was correlated with indifference (r=0.26, p<0.01) and tension relieve strategy (r=0.28, p<0.01). There's no stress when they meet or serve direct care to patients. Students managed the stress by showing active coping pattern. It is considered that the experience gave students an excellent capacity to cope with stress. Since the degree of stress and coping pattern can differ from adaptability of situation, a research of change in clinical training stress by seasonal clinical training and coping patter is proposed.

• The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY
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• v.17 no.2
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• pp.95-111
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• 2012

Relationship between plankton assemblage and environmental factors in a semi-closed Chunsu Bay was examined. Temporal changes in phytoplankton assemblage was rather drastic than those found in most Korean coastal area in the Yellow Sea primarily due to the seawater temperature (T) and nutrient input from the dikes nearby. Freshwater discharge seemed to cause winter time increase of Diatoms (February) and summer time increase of Dinoflagellates at surface (July to August). Structural change in cell size with time was also found in Diatom. Zooplankton community structure was also changed with season probably due to the food concentration, seawater temperature and salinity (S). From principal component analysis (PCA) of zooplankton distribution, it was postulated that seasonal environmental changes such as T and S could explain about 32% of variability in zooplankton distribution along with phytoplankton cell numbers, while freshwater discharge could explain about 17%. Comparing with past data of 1985-1986, 1991-1992, the distributional patterns and percent composition of major species, Acartia hongi, Paracalanus parvus sensu lato and Centropages abdominalis, were similar. However, the abundances have been increased more than three times. The composition of other taxa than copepods showed significant changes.

• Parasites, Hosts and Diseases
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• v.29 no.2
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• pp.181-188
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• 1991

Epidemiological studies on host rodents of tsutsugamushi disease were carried out during the period of July∼September 1990 at nine localities of central Korea. Among total 111 wild rodents trapped by the modified Sherman live traps, 103 were Apodemus agrarius (92.8%), seven were Crocidura lasiura (6.3%) and one was Microtus fortis (0.9%) , showing 24.0% of trapping rate in winter, 11.7% in spring, 11,2% in summer and 12.0% in autumn. Out of 103 A. agrarius 84 were parasitized by chiggers, showing 81.6% of the infestation rate and 43.0 of the chigger index. The antibody positive rate of A. agrarius sera to Rickettsia tsutsugamushi was significantly variable by locality, being in the range of 0∼78.6%. The seasonal change of the antibody positive rate at Dorai 5-ri, Goyang-gun was 75.8% in average during November∼March, decreased to 30.3% in April and further decreased to 13.3% in average during May∼August. Among 33 antibody positives, 31 were Karp strain and two were Gilliam. Seven Crocidura lasiura sera showed all negative. R. tsutsugamushi organisms were isolated from three A. ngrarius out of 94 mice tested, showing 3.2% of the infection rate.

• Journal of Food Hygiene and Safety
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• v.15 no.2
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• pp.68-78
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• 2000

In Korea, food balance sheet and national nutrition survey have been conducted in parallel by Central Government for several decades. However, the gap between the two statistics became larger to reach an intolerable level in recent years, likely due to the limitation of dietary survey method in spite of the drastic change in dietary habits after industrialization and urbanization during last three decades. The currently available data from national nutrition survey was optimized by taking in to account of the food balance sheet. Adjusted consumption data for individual food items during the period of 1991-95 were given in tabular forms for groups of cereals potatoes sugars & sweets, legumes, nuts & seeds, fruits, vegetables, meats, eggs, dairy products oils & fats and fishery foods. Conversion factors of processed foods including wheat products, soybean products, Kimchi and dairy products into their raw materials were tentatively proposed. Great differences between supply data and intake data of food commodities were pointed out to be likely due to the seasonal variation and ignorance of processed foods and dining-out in the national nutrition survey. It is recommended to utilize these optimized food intake data as the nationally-representative one until new data from the national health and nutrition survey undertaken after modified procedures since 1998 are obtained and verified in future.