• Journal of Aquaculture
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• v.8 no.1
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• pp.59-67
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• 1995

Growth rate, first reproductive age, life span and total offspring numbers were measured to study the effects of water temperature and salinity on the propagation of rotifer, Brachionus plicatilis. Three types of rotifer, Large (L), Small (S) and Thailand Small (TS)-types, were cultured in the $4\times4$ factorial culture conditions with four different salinities (5, 15, 25 and $35\%o$) at each of four different water temperatures (15, 20, 25 and $29^{\circ}C$). The results are as follows; Under the 4 different salinity gradients %$(5\%o,\;15\%o,\;25\%o,\;and\;35\%o)\;at\;29^{\circ}C$, the mean growth rates of L, Sand TS-type were 0.60, 0.84 and 0.96, respectively. The first reproductive age of three types rotifer appeared to be early at high water temperature. The total offspring numbers of the three types were higher at $25^{\circ}C\;and\;29^{\circ}C$, with the maximum value of 28.3 on the average at $29^{\circ}C$ for TS-type, and the minimum value at $15^{\circ}C$ for S-type. Life span decreased with high water temperature and increased with low water temperature. L-type and TS-type rotifer showed the longest life span of 13.5 days on the average at $15^{\circ}C$, and S-type showed shortest 6.2 days on the average at $29^{\circ}C$.

• Journal of Service Research and Studies
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• v.9 no.1
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• pp.1-16
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• 2019

This study analyzed Korean representative ideology to establish a service philosophy. As a follow - up study of the service philosophy consistency study of the Korean original idea, we searched for the coherence as the philosophy of the service age in the Korean representative ideology. The basic structure and operation model of service philosophy are presented, and the service philosophy of major korean ideology is derived. The philosophy of service can be presented by the structure of service and the operation of service. The essential characteristics of the service are relationship, interactivity, horizontality, and harmony, and the service structure that reflects this is the coexistence of products and services. Based on the discussion on the structure and operation of the service philosophy, the service philosophy synthesis of Korean representative ideology is presented. From the Silla era to the Koryo dynasty, the essence of Korean Buddhism thought is in line with the service philosophy, and it was found that Toegye and Yulgok to Dasan's thoughts are also consistent with service philosophy. In the future, we need further studies to refine the structure and operational principles of the service philosophy and to develop it into a big idea. In addition, it is necessary to follow up the service philosophy of Oriental representative ideology centering on Chinese and Indian philosophy. Ultimately, it is necessary to establish a service philosophy as the main philosophical thought and to establish a service philosophy as a desirable future economic and social philosophy.

• Korean journal of applied entomology
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• v.44 no.3 s.140
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• pp.177-187
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• 2005

For the comparison of feeding behavior of Nilaparvata lugens among different rice varieties, electrical penetration graph (EPG) technique was used. Ten rice varieties were selected from national-widely recommended rice varieties cultivating in Chungnam province. The correlation between feeding duration and honeydew amount excreted was investigated, and the types of EPG pattern were analyzed among rice varieties. The EPG patterns divided into 6 types according to electrical specific feature, respectively. Type 1 pattern was a searching feeding sites, resting or wandering on a rice plant. Type 2 pattern was appeared when the insect untaken from phloem sieve element. Type 3 pattern was observed when the insect piercing into the rice plant. Type 4 pattern was observed when the insect salivating in rice plant. Type 5 pattern was observed when the insect ingesting from the xylem. Type 6 pattern was observed when the stylet moving in cell. Feeding duration time on Gum-nam was significantly shorter than Dong-jin, Dae-ahn, Dong-ahn, Dae-san. Also, on Gun-nam, it was shown that the brown planthopper did not penetrate the cuticle for a long time. The total number of excreted honeydew droplets by the brown planthopper was the greatest in Dong-jin variety and the least in Gum-nam variety. In proportion to phloem feeding time, the number of honeydew droplets had been increased. According to the results of EPG patterns and honeydew droplets analysis, N. lugens seems to prefer Dong-jin, Dong-ahn, Dae-san, and Dae-ahn to Gum-nam, Da-san, and Nam-chun rice plant variety.

• Journal of the Korean association of regional geographers
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• v.15 no.1
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• pp.36-52
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• 2009

Demographic change is the best indicator to be able to show the rural change exactly and thus becomes the factor to be considered by all means in the setting-up process of the rural development policy. First of all, this paper is concerned with the two main themes, depopulation and aging process of Goryeong-gun(county), after a brief consideration of the demographic trends in rural areas of Korea. And then it will analyze the population structures of 8 administrative districts of Goryeong-gun(1 Eub, 7 Myeons) to reveal the areal differentiation of rural demographic change. Like other rural areas in Korea, Goryeong-gun experienced a sharp depopulation and aging during last several decades, and it represents typical rural backward areas in Korea. But within the same county, the process of population change differs from district to district. On the basis of several demographic indicators, 8 administrative districts(Eub and Myeons) in Goryeong-gun can be classified into 4 types of population change, namely 'type with stagnant population' like Goryeong-eub, 'type with increasing population' like Dasan-myeon, 'type with decreasing population' like Seongsan-myeon Gaejin-myeon Sangrim-myeon, 'type with rapidly decreasing population' like Deokgok-myeon Unsu-myeon Ugok-myeon. It highlights the need to develop differentiated rural policies according to relevant regional conditions.

• Journal of the Korean association of regional geographers
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• v.15 no.1
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• pp.1-15
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• 2009

This study aims to provide preliminary data needed for establishing policies on the environment and disasters of Goryeong county. The main results are as follows. First, the present master plan of the region does not reflect local socio-economic and environmental conditions and the local people's opinion. Second, The air conditions of Gyeongbuk province and Goryeong county are within the permitted limit of air pollution of Korea. Third, the analysis of water pollution index in Nakdong river system shows improvement of water quality in both Andong and Goryeong. Fourth, the conditions of waste collection and disposal are improved in both Gyeongbuk province and Goryeong county. Fifth, in case of environmental pollutant emitting facilities of Gyeongbuk province, the proportion of 1st to 4th grade(relatively much more environmental pollutant emitting quantity than 5th grade) tends to be increasing. Sixth, environmental pollutant emitting facilities of Goryeong county are remarkably increasing in Dasan, Gaegin, Ssangrim, involving industrial complex. Finally, in case of disasters, it is relatively stable in Yecheon, Gumi, Uiseong, Yeongju and Cheongdo, while relatively unstable in Seongju, Gunwi, Yeongcheon, Chilgok, Mungyeong, Bonghwa and Goryeong.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.42 no.2
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• pp.182-188
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• 1997

The study was carried out to determine an optimum concentration of plant growth regulators(ABA and kinetin) on reducing NaCl toxicity during germination in rice. Plant height of a japonica cultivar Ilpumbyeo in ABA 10$^{-5}$ M was increased, while all treatments of kinetin had no clear effects on increasing the plant height. However, other rice cultivars showed slightly different reaction by PGRs compared with Ilpumbyeo. Germination rate of four rice cultivars was ranged from 53.1 to 58.2％ in NaCl 1.3％. All treatments of kinetin accelerated germination rate of tested rice cultivars except Dasanbyeo compared with NaCl 1.3％ treatment. The higher concentration of ABA and kinetin treatment induced the higher starch content, and while the lower concentration of two plant growth regulators induced the higher sugar content in all four rice cultivars. The free proline content of rice seedlings was highest in Ilpumbyeo among the tested cultivars under NaCl 1.3％ treatment.

• Journal of Korean Society of Transportation
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• v.22 no.6
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• pp.159-173
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• 2004

Using a generalized translog multiproduct cost function model, this paper examines economies of scale and scope in the vertically-integrated Korean railway industry. The paper then conceptualizes that the Korea National Railroad (KNR) produces four outputs (passenger-kilometers, ton-kilometers of freight, average length of passenger trips, and average length of freight haul) using three input factors(labor, fuel and maintenance, and rolling stock and capital). Using time series data collected from the KNR's annual records for the years from 1977 to 2002, the simultaneous equation system consisting of a cost function and two input share equatins is estimated with the Zellner's iterative seemingly unrelated regression. The findings show that the cost function corresponding to a non-Cobb-Douglas, non-homothetic, and non-homogeneous production technology adequately represents the KNR's cost structure. On the other hand, the Korean railway industry experiences sizeable overall scale economies, which result from substantial product-specific scale economies associated with passenger-kilometers and freight ton-kilometers and from scope economies associated with their joint production. In addition, the magnitude of economies of scope is influenced largely by the ratio of passenger trips, and has increased over time as the former has increased while the latter has decreased.

• Korean Journal of Heritage: History & Science
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• v.44 no.4
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• pp.70-85
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• 2011

The study of the modern art market and distribution differs in its research focus from that of traditional art history, which traces and analyzes the works of master artists, their schools and influence, in that it attempts to approach such issues as art and society, and distribution and consumption of works of art, based on new research methods and perspectives. This paper examines the life and art collection activities of Park Yeong-cheol, considered to be one of the earliest major modern Korean art collectors. He graduated from the Japanese military academy and served as both a solider of the Greater Korean Empire and a high level officer of the Japanese army. After being discharged, he served as Governor of Gangwon-do and then Hamgyeongbuk-do, and after his retirement from public office, he became a leading businessman. He is well-known as a Japanese sympathizer who approved of and advocated for the aggressive colonial policies of the Japanese empire. As a cultural enthusiast and art collector, however, Park Yeong-cheol published the most accurate edition of Yeonamjip, and donated his collection to Geyongseong University at the end of his life, thus providing the foundation for the Seoul National University Museum. All of these activities are highly commendable. His interest in growing his collection of paintings and calligraphies was largely motivated by his love of paintings and Chinese poems,but it also appears to have been the result of his active collaboration with the Japanese government's policy of trying to discover the distinct, non-western characteristics of traditional Eastern art.

• PNF and Movement
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• v.16 no.3
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• pp.485-493
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• 2018

Purpose: This study provides a treatment for central nervous system development in patients with chronic stroke by investigating changes in the upper limb function over time. The correlations among the activities, participation, and environmental factors of the international classification of functioning (ICF), disability and health are also examined. Methods: The subjects of this study are 18 patients with chronic stroke who were hospitalized and treated at 00 hospital in the Chungcheongbuk-do province. Their upper extremity functions are evaluated using the manual function test (MFT). The activities, participation, and environmental factors are evaluated using the ICF generic form. The correlations between the total scores of the affected and unaffected sides and the ICF items are analyzed using the Pearson correlation analysis. The significance level is p<0.05. Results: When the correlations between the activities and participation areas of ICF and the total score of the affected side of MFT were examined, significant correlations (p<0.05) were found in the following items: changing basic body position (D410), lifting and carrying objects (D430), moving around using equipment (D465), using transportation (D470), washing oneself (D510), caring for body parts (D520), and dressing (D540). When the correlations between the activities and participation areas of ICF and the total score of the unaffected side of MFT were examined, significant correlations (p<0.05) were found among writing (D170), speaking (D330), eating (D550), and drinking (D560). In addition, when the correlation between the environment area of ICF and the total score of the unaffected side of the MFT were examined, significant correlations (p<0.05) were found between products and technology for personal use in daily living (E115) and immediate family (E310). Conclusion: The MFT of patients with chronic stroke is closely correlated with the activities, participation, and environmental factors of ICF. This result suggests that ICF can be used as a useful tool to comprehensively evaluate the abilities of the patient, including the upper extremity function.

• Korean Journal of Breeding Science
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• v.50 no.4
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• pp.522-528
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• 2018

Saemimyeon, a Tongil type, medium-late maturing rice variety, is especially used for preparing rice noodles. Its high amylose content was developed to fit market demands and to be affordable for rice processing industries. One of the high yielding lines, Milyang181 (Hanareum), was used in the final three-way cross of $IR50^*2$/YR18241-B-B-115-1-1 for yield improvement and cultivation stabilization, including disease resistance. YR24235-10-1-3, a high yielding and compact plant type, was selected and named Milyang278 after yield test at NICS (RDA, Miryang) in 2010. It was subjected to regional yield test at six sites in the middle and southern plain areas of South Korea. Saemimyeon heading occurs on August 12 and is a mid-late maturing cultivar, with resistance to leaf blast, rice stripe virus, and bacterial blight (K1-K3a), but it is susceptible to major diseases and insect pest infestation. Saemimyeon showed a high amylose content of 26.7%, with a relatively low KOH digestion value of 3.5, which are key factors in rice noodles and pasta processing. In the local adaptability tests, the yield of Saemimyeon was 7.08 MT/ha-an increase of approximately 106% compared to that of Dasan. Thus, Saemimyeon is suitable for cultivation in the southern and middle plain areas of South Korea.