• Korean Journal of Materials Research
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• v.9 no.8
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• pp.810-816
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• 1999

The variations of crystalline structures and physical proerties of serpentine and talc mineral which was treated in a planetary ball mill, wre investigated by means of X-ray diffraction, FT-IR, DSC-TG, particle size analysis and SEM observation. The crystalline peaks of serpentine and talc in the XRD patterns were gradually reduced with the increase of grinding time and after 120 minutes turned into the amorphous phase, which is attributed to the disordering of the local structure around magnesium. The endothermic peaks for the ground serpentine and talc sample are observed at a considerably lower temperatures than that for the starting sample. A morphological change from the originally flat and irregular shape to spherically agglomerated particles was clearly observed.

• International Journal of Highway Engineering
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• v.13 no.4
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• pp.93-101
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• 2011

The evaluation of various color coating methods for color maintenance of color asphalt pavement is conducted using the laboratory and field tests on the bus lane. The surface of color asphalt constructed on the bus lane is deteriorated such as changing color and decoloration and abrasion due to the passing of the traffic and time. The total of 9 coating methods were evaluated in this study. The laboratory tests included Ultra violet test, adhesion test and Taber abrasion test and the field tests were british pendulum test and visual survey. The results of tests showed that the different methods showed the their own engineering characteristics and it is dependant upon the main material used. The rubber epoxy material for the main material showed the satisfactory result among the methods tested. However, the performance of the coating methods after 100days are not satisfactory, decoloration, abrasion and peeling up are investigated and need to be studied for the further application in the field.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.32 no.4B
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• pp.234-245
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• 2007

There are lots of controversies over the introduction of MVNO(Mobile Virtual Network Operator) policy to Korean mobile telecommunications market. MVNO is a kind of service-based competition in mobile market. This paper attempts to analyze the ripple effect of MVNO regulation and also desirable ways of implementing the policy. Based on Laffont, Rey and Tirole(1998), Armstrong (1998) model, theoretical MVNO model is defined and derived implications of price, quantity in the market. According to the model, the fact that MNOs have one-way access profit leads the static efficiency by lowering its market price. In regarding the most desirable way to enhance social welfare is revealed as 'two MNOs conduct MVNO' other than 'One MNO does' or 'Structurally divided network'.

• Korean Journal of Food Science and Technology
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• v.44 no.5
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• pp.568-576
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• 2012

Baksulgi with various sugar substitutes was prepared and characterized for physicochemical and sensory qualities. The 10% sugar in a control baksulgi was replaced with 16.1% glucose, 13.3% erythritol, 10.2% xylitol, 0.2% stevioside (enzymatically modified stevia 100%), 0.05% aspartame, or 1.2% sucralose. Instrumental and sensory analyses indicated that the baksulgi with glucose was significantly different in color from the others, which was attributed to high susceptibility to browning reaction of the glucose. Baksulgi with aspartame showed significantly lower pH than that of control baksulgi, suggesting that the aspartame might have been hydrolyzed into its constituent amino acids under elevated steaming temperature. A sensory evaluation revealed that baksulgi with sucralose or xylitol was comparable to the control baksulgi in all sensory characteristics. However, the baksulgi with sucralose showed appreciably increased hardness with increased storage time at $4^{\circ}C$, partially due to the anhygroscopic property of sucralose.

• Korean Journal of Food Science and Technology
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• v.45 no.6
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• pp.754-762
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• 2013

This study investigated the relative sweetness of various sweeteners (tagatose, xylose, erythritol, sucralose, and enzyme treated stevia) in milk and instant coffee systems. Additionally, the effects of interactions with other ingredients on the sensory characteristics of milk and coffee were explored. In the case of a banana-flavored milk system, sucrose was added to a concentration of 5%, and the five types of sweetener were added to a concentration of equal sweetness to a 5% concentration of sucrose. For coffee systems, 5.9% sucrose level and sweeteners' concentration equivalent to this level was added. A generic descriptive analysis was performed using ten trained panelists. The results showed that the relative sweetness of all the sweeteners was identical to that identified in the aqueous system, except for stevia in the milk system and in the coffee system with added vegetable cream. For the black coffee system, the relative sweetness decreased for tagatose, erythritol and for stevia. Fat and vegetable cream significantly affected the sensory qualities of milk and coffee, respectively.

• Journal of Preventive Medicine and Public Health
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• v.27 no.1 s.45
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• pp.117-134
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• 1994

The effects of regional medical insurance on utilization of medical care in urban population was examined in this study. The data was collected in a 2-year follow-up household survey conducted at Taegu city before and after implementation of the regional medical insurance. The study population was divided into 2 groups. Cohort I was the uninsured in 1989 and cohort II was the insured in 1989. After the coverage of medical insurance, physician visit rate per 1,000 population, use-disability ratio and use-restricted activity ratio in cohort I were increased compared to cohort II in both of acute and chronically ill people. The use-disability ratio and use-restricted activity ratio of the insured poor were lower than those of the insured nonpoor in both of cohort I and cohort II. The major reasons for pharmacy use were accessibility and affordability before the coverage of medical insurance in cohort I, however, after the coverage of medical insurance, the important reason was accessibility rather than affordability. In logistic regression analysis of physician visit, the significant independent variables were acute illness episode (+), chronic illness episode (+) and income (+) in both of cohort I and cohort II. In cohort I, after the coverage of medical insurance, more people replied that the medical cost of hospital and clinic was reasonable. The people who covered by the regional medical insurance were more dissatisfied with the imposed premium than those who covered by other types of medical insurance in both of cohort I and cohort II. More people in cohort II than cohort I were dissatisfied with the services from hospitals and clinics after implementation of the regional medical insurance. In conclusion. after the coverage of medical insurance, the gap between the poor and the nonpoor still exists in terms of medical care utilization.

• 한국생물공학회:학술대회논문집
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• 2003.04a
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• pp.263-266
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• 2003

Dental caries suppression effect of herb extracts were measured in comparison with sucrose. The result of susceptibility test for dental caties by using Streptococcus mutans KCTC 3065, Streptococcus cricetus KCTC 3292, Streptococcu rattus KCTC 3294, Actinomyces naeslundii KCTC 9013 indicated that Astragalus membranaceus BUNGE was effective than another herbs.

• Korean Deer Journal
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• no.21
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• pp.19-25
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• 1995

우리나라의 사슴에 공급되는 조사료는 대부분 중국산 갈잎건초, 옥수수 사일리지 및 일부 자가 생산된 조사료이다. 우리나라에서 녹용생산을 위해 사육되고 있는 사슴은 6개의 사슴아과중 진사슴아과(Cervinae)에 속하는 꽃사슴, 붉은사슴, 엘크, 다마 사슴들로 이들은 거친사료에 가장 잘 적응되어 있는 종류들이다. 특히 사슴은 타 동물과는 달리 난틴성분을 분해할 수 있는 능력이 있으므로 갈잎이나 어린새싹등을 소화하는데 잘 길들여져 있다. 그러나 우리나라에서 수입하고 있는 갈잎은 품질이 균일하지 못한 경우가 있고 사슴의 사육기간에 따라 고단백사료를 필요로 하므로 대체 사료의 개발이라는 측면에서 가격만 적당하다면 다양한 무기물과 미지성장인자가 많이 함유된 것으로 알려진 알팔파도 좋은 사료자원이 될 수 있을 것이다. 그러나 이러한 알팔파를 사슴사료로 이용하기 위해서는 섬유소와 에너지 단백질의 적정요구량을 결정하고 여러가지 가공알팔파를 적절히 이용하는 방법을 찾아내는 것이 필요하다. 따라서 여기에서는 1992년부터 1993년까지 카나다의 알버타 대학에서 실시한 사슴사료로써 알팔파의 효과와 각종 가공 알팔파의 올바른 이용방법에 대해 연구한 것을 발표하고자 한다.

• 한국생물공학회:학술대회논문집
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• 2002.04a
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• pp.297-300
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• 2002

Dental caries suppression effect of herb extracts were measured in comparison with sucrose. The result of susceptibility test for dental caries by using Streptococcus mutans KCTC 3065, Streptococcus cricetus KCTC 3292, Streptococcu rattus KCTC 3294, Actinomyces naeslundii KCTC 9013 indicated that Astragalus membranaceus BUNGE was effective than another herbs.

• The Journal of the Korea Contents Association
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• v.14 no.8
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• pp.277-286
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• 2014

The purpose of this study was to identify the relationship between the health insurance perception level and health insurance satisfaction for national health insurance subscriber. The collected data were analyzed by $X^2$-test, t-test, ANOVA using the SPSS/WIN (ver.14.0). Research results can be summarized as follows. The relationship between the health insurance perception level and health insurance satisfaction was relatively high. The study showed significantly high levels in the score of health insurance satisfactions according to perception of security level, health insurance premium, positive thinking, and fair in premium charge. Also health insurance satisfaction scores were significantly low levels according to perception of raise health insurance premium and burden on households. This study investigated the relationship between the detail perception and satisfaction for national health insurance. Therefore, we are setting the overall direction of national health insurance perception, and look forward to utilizing the basis data as help to improve the system of health insurance for people.